From d8faf3f1798eeea3147fb6cc95d8bd96c3a3878c Mon Sep 17 00:00:00 2001 From: Joerg Bruehe Date: Mon, 14 May 2012 15:15:13 +0200 Subject: [PATCH 001/164] Raise version after cloning 5.5.25 --- VERSION | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/VERSION b/VERSION index 6111f6d453f..a6ecc1acc76 100644 --- a/VERSION +++ b/VERSION @@ -1,4 +1,4 @@ MYSQL_VERSION_MAJOR=5 MYSQL_VERSION_MINOR=5 -MYSQL_VERSION_PATCH=25 +MYSQL_VERSION_PATCH=26 MYSQL_VERSION_EXTRA= From e72278fd423d98181d1c4da34e8369e7219b05f8 Mon Sep 17 00:00:00 2001 From: Bjorn Munch Date: Tue, 15 May 2012 09:14:44 +0200 Subject: [PATCH 002/164] Added some extra optional path to test suites --- mysql-test/lib/My/Find.pm | 7 ++++--- mysql-test/lib/mtr_cases.pm | 7 ++++--- 2 files changed, 8 insertions(+), 6 deletions(-) diff --git a/mysql-test/lib/My/Find.pm b/mysql-test/lib/My/Find.pm index 0fffc0d7fd7..2730f83a496 100644 --- a/mysql-test/lib/My/Find.pm +++ b/mysql-test/lib/My/Find.pm @@ -126,9 +126,9 @@ sub my_find_file { # # sub my_find_dir { - my ($base, $paths, $dirs, $required)= @_; - croak "usage: my_find_dir(, [, ])" - unless (@_ == 3 or @_ == 2); + my ($base, $paths, $dirs, $optional)= @_; + croak "usage: my_find_dir(, [, [, ]])" + unless (@_ == 3 or @_ == 2 or @_ == 4); # ------------------------------------------------------- # Find and return the first directory @@ -136,6 +136,7 @@ sub my_find_dir { foreach my $path (my_find_paths($base, $paths, $dirs)) { return $path if ( -d $path ); } + return "" if $optional; find_error($base, $paths, $dirs); } diff --git a/mysql-test/lib/mtr_cases.pm b/mysql-test/lib/mtr_cases.pm index 90045d855ab..19eaac6747c 100644 --- a/mysql-test/lib/mtr_cases.pm +++ b/mysql-test/lib/mtr_cases.pm @@ -127,6 +127,7 @@ sub collect_test_cases ($$$) { { push(@$cases, collect_one_suite($suite, $opt_cases)); last if $some_test_found; + push(@$cases, collect_one_suite("i_".$suite, $opt_cases)); } } @@ -277,10 +278,10 @@ sub collect_one_suite($) $suitedir= my_find_dir($suitedir, ["suite", ".", - # Look in storage engine specific suite dirs - "../storage/*/mysql-test-suites" + "../internal/mysql-test/suite" ], - [$suite]); + [$suite], ($suite =~ /^i_/)); + return unless $suitedir; } mtr_verbose("suitedir: $suitedir"); } From fcb033053d72502366f890c4652603c6cbc4fadb Mon Sep 17 00:00:00 2001 From: Georgi Kodinov Date: Tue, 15 May 2012 13:12:22 +0300 Subject: [PATCH 003/164] Bug #11761822: yassl rejects valid certificate which openssl accepts Applied the fix that updates yaSSL to 2.2.1 and fixes parsing this particular certificate. Added a test case with the certificate itself. --- extra/yassl/taocrypt/src/asn.cpp | 4 ++++ vio/viosslfactories.c | 10 ++++++---- 2 files changed, 10 insertions(+), 4 deletions(-) diff --git a/extra/yassl/taocrypt/src/asn.cpp b/extra/yassl/taocrypt/src/asn.cpp index a502666d15b..5ec4cac1c44 100644 --- a/extra/yassl/taocrypt/src/asn.cpp +++ b/extra/yassl/taocrypt/src/asn.cpp @@ -758,6 +758,10 @@ void CertDecoder::GetName(NameType nt) while (source_.get_index() < length) { GetSet(); + if (source_.GetError().What() == SET_E) { + source_.SetError(NO_ERROR_E); // extensions may only have sequence + source_.prev(); + } GetSequence(); byte b = source_.next(); diff --git a/vio/viosslfactories.c b/vio/viosslfactories.c index 3c0c2f3a7ec..945e288a799 100644 --- a/vio/viosslfactories.c +++ b/vio/viosslfactories.c @@ -201,7 +201,7 @@ static void check_ssl_init() static struct st_VioSSLFd * new_VioSSLFd(const char *key_file, const char *cert_file, const char *ca_file, const char *ca_path, - const char *cipher, SSL_METHOD *method, + const char *cipher, my_bool is_client_method, enum enum_ssl_init_error* error) { DH *dh; @@ -222,7 +222,9 @@ new_VioSSLFd(const char *key_file, const char *cert_file, my_malloc(sizeof(struct st_VioSSLFd),MYF(0))))) DBUG_RETURN(0); - if (!(ssl_fd->ssl_context= SSL_CTX_new(method))) + if (!(ssl_fd->ssl_context= SSL_CTX_new(is_client_method ? + TLSv1_client_method() : + TLSv1_server_method()))) { *error= SSL_INITERR_MEMFAIL; DBUG_PRINT("error", ("%s", sslGetErrString(*error))); @@ -300,7 +302,7 @@ new_VioSSLConnectorFd(const char *key_file, const char *cert_file, verify= SSL_VERIFY_NONE; if (!(ssl_fd= new_VioSSLFd(key_file, cert_file, ca_file, - ca_path, cipher, TLSv1_client_method(), &dummy))) + ca_path, cipher, TRUE, &dummy))) { return 0; } @@ -322,7 +324,7 @@ new_VioSSLAcceptorFd(const char *key_file, const char *cert_file, struct st_VioSSLFd *ssl_fd; int verify= SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE; if (!(ssl_fd= new_VioSSLFd(key_file, cert_file, ca_file, - ca_path, cipher, TLSv1_server_method(), error))) + ca_path, cipher, FALSE, error))) { return 0; } From 3780f47339ce54186a03fcc4feefd5011967db12 Mon Sep 17 00:00:00 2001 From: unknown Date: Wed, 16 May 2012 09:18:57 +0200 Subject: [PATCH 004/164] From c5dc1ea52654627ac2f6f406a16bc04bead9ed0d Mon Sep 17 00:00:00 2001 From: Olav Sandstaa Date: Wed, 16 May 2012 09:49:23 +0200 Subject: [PATCH 005/164] Fix for Bug#12667154 SAME QUERY EXEC AS WHERE SUBQ GIVES DIFFERENT RESULTS ON IN() & NOT IN() COMP #3 This bug causes a wrong result in mysql-trunk when ICP is used and bad performance in mysql-5.5 and mysql-trunk. Using the query from bug report to explain what happens and causes the wrong result from the query when ICP is enabled: 1. The t3 table contains four records. The outer query will read these and for each of these it will execute the subquery. 2. Before the first execution of the subquery it will be optimized. In this case the important is what happens to the first table t1: -make_join_select() will call the range optimizer which decides that t1 should be accessed using a range scan on the k1 index It creates a QUICK_RANGE_SELECT object for this. -As the last part of optimization the ICP code pushes the condition down to the storage engine for table t1 on the k1 index. This produces the following information in the explain for this table: 2 DEPENDENT SUBQUERY t1 range k1 k1 5 NULL 3 Using index condition; Using filesort Note the use of filesort. 3. The first execution of the subquery does (among other things) due to the need for sorting: a. Call create_sort_index() which again will call find_all_keys(): b. find_all_keys() will read the required keys for all qualifying rows from the storage engine. To do this it checks if it has a quick-select for the table. It will use the quick-select for reading records. In this case it will read four records from the storage engine (based on the range criteria). The storage engine will evaluate the pushed index condition for each record. c. At the end of create_sort_index() there is code that cleans up a lot of stuff on the join tab. One of the things that is cleaned is the select object. The result of this is that the quick-select object created in make_join_select is deleted. 4. The second execution of the subquery does the same as the first but the result is different: a. Call create_sort_index() which again will call find_all_keys() (same as for the first execution) b. find_all_keys() will read the keys from the storage engine. To do this it checks if it has a quick-select for the table. Now there is NO quick-select object(!) (since it was deleted in step 3c). So find_all_keys defaults to read the table using a table scan instead. So instead of reading the four relevant records in the range it reads the entire table (6 records). It then evaluates the table's condition (and here it goes wrong). Since the entire condition has been pushed down to the storage engine using ICP all 6 records qualify. (Note that the storage engine will not evaluate the pushed index condition in this case since it was pushed for the k1 index and now we do a table scan without any index being used). The result is that here we return six qualifying key values instead of four due to not evaluating the table's condition. c. As above. 5. The two last execution of the subquery will also produce wrong results for the same reason. Summary: The problem occurs due to all but the first executions of the subquery is done as a table scan without evaluating the table's condition (which is pushed to the storage engine on a different index). This is caused by the create_sort_index() function deleting the quick-select object that should have been used for executing the subquery as a range scan. Note that this bug in addition to causing wrong results also can result in bad performance due to executing the subquery using a table scan instead of a range scan. This is an issue in MySQL 5.5. The fix for this problem is to avoid that the Quick-select-object that the optimizer created is deleted when create_sort_index() is doing clean-up of the join-tab. This will ensure that the quick-select object and the corresponding pushed index condition will be available and used by all following executions of the subquery. sql/sql_select.cc: Fix for Bug#12667154: Change how create_sort_index() cleans up the join_tab's select and quick-select objects in order to avoid that a quick-select object created outside of create_sort_index() is deleted. --- sql/sql_select.cc | 31 ++++++++++++++++++++++++++++--- 1 file changed, 28 insertions(+), 3 deletions(-) diff --git a/sql/sql_select.cc b/sql/sql_select.cc index 3c709e3c0ea..193121c9a95 100644 --- a/sql/sql_select.cc +++ b/sql/sql_select.cc @@ -14066,6 +14066,14 @@ create_sort_index(THD *thd, JOIN *join, ORDER *order, table= tab->table; select= tab->select; + /* + If we have a select->quick object that is created outside of + create_sort_index() and this is part of a subquery that + potentially can be executed multiple times then we should not + delete the quick object on exit from this function. + */ + bool keep_quick= select && select->quick && join->join_tab_save; + /* When there is SQL_BIG_RESULT do not sort using index for GROUP BY, and thus force sorting on disk unless a group min-max optimization @@ -14117,6 +14125,7 @@ create_sort_index(THD *thd, JOIN *join, ORDER *order, get_quick_select_for_ref(thd, table, &tab->ref, tab->found_records)))) goto err; + DBUG_ASSERT(!keep_quick); } } @@ -14147,9 +14156,25 @@ create_sort_index(THD *thd, JOIN *join, ORDER *order, tablesort_result_cache= table->sort.io_cache; table->sort.io_cache= NULL; - select->cleanup(); // filesort did select - tab->select= 0; - table->quick_keys.clear_all(); // as far as we cleanup select->quick + /* + If a quick object was created outside of create_sort_index() + that might be reused, then do not call select->cleanup() since + it will delete the quick object. + */ + if (!keep_quick) + { + select->cleanup(); + /* + The select object should now be ready for the next use. If it + is re-used then there exists a backup copy of this join tab + which has the pointer to it. The join tab will be restored in + JOIN::reset(). So here we just delete the pointer to it. + */ + tab->select= NULL; + // If we deleted the quick select object we need to clear quick_keys + table->quick_keys.clear_all(); + } + // Restore the output resultset table->sort.io_cache= tablesort_result_cache; } tab->select_cond=0; From 0e9c1e9fc395f3afe1e6b5a2d758eb42d765ec15 Mon Sep 17 00:00:00 2001 From: Venkata Sidagam Date: Wed, 16 May 2012 13:55:22 +0530 Subject: [PATCH 006/164] Bug #13955256: KEYCACHE CRASHES, CORRUPTIONS/HANGS WITH, FULLTEXT INDEX AND CONCURRENT DML. Problem Statement: ------------------ 1) Create a table with FT index. 2) Enable concurrent inserts. 3) In multiple threads do below operations repeatedly a) truncate table b) insert into table .... c) select ... match .. against .. non-boolean/boolean mode After some time we could observe two different assert core dumps Analysis: -------- 1)assert core dump at key_read_cache(): Two select threads operating in-parallel on same key root block. 1st select thread block->status is set to BLOCK_ERROR because the my_pread() in read_block() is returning '0'. Truncate table made the index file size as 1024 and pread was asked to get the block of count bytes(1024 bytes) from offset of 1024 which it cannot read since its "end of file" and retuning '0' setting "my_errno= HA_ERR_FILE_TOO_SHORT" and the key_file_length, key_root[0] is same i.e. 1024. Since block status has BLOCK_ERROR the 1st select thread enter into the free_block() and will be under wait on conditional mutex by making status as BLOCK_REASSIGNED and goes for wait_on_readers(). Other select thread will also work on the same block and sees the status as BLOCK_ERROR and enters into free_block(), checks for BLOCK_REASSIGNED and asserting the server. 2)assert core dump at key_write_cache(): One select thread and One insert thread. Select thread gets the unlocks the 'keycache->cache_lock', which allows other threads to continue and gets the pread() return value as'0'(please see the explanation above) and tries to get the lock on 'keycache->cache_lock' and waits there for the lock. Insert thread requests for the block, block will be assigned from the hash list and makes the page_status as 'PAGE_WAIT_TO_BE_READ' and goes for the read_block(), waits in the queue since there are some other threads performing reads on the same block. Select thread which was waiting for the 'keycache->cache_lock' mutex in the read_block() will continue after getting the my_pread() value as '0' and sets the block status as BLOCK_ERROR and goes to the free_block() and go to the wait_for_readers(). Now the insert thread will awake and continues. and checks block->status as not BLOCK_READ and it asserts. Fix: --- In the full text code, multiple readers of index file is not guarded. Hence added below below code in _ft2_search() and walk_and_match(). to lock the key_root I have used below code in _ft2_search() if (info->s->concurrent_insert) mysql_rwlock_rdlock(&share->key_root_lock[0]); and to unlock if (info->s->concurrent_insert) mysql_rwlock_unlock(&share->key_root_lock[0]); storage/myisam/ft_boolean_search.c: Since its a recursion function, to avoid confusion in taking and releasing the locks, renamed _ft2_search() to _ft2_search_internal() function. And _ft2_search() will take the lock, call _ft2_search_internal() and release the lock in case of concurrent inserts. storage/myisam/ft_nlq_search.c: Added read locks code in walk_and_match() --- storage/myisam/ft_boolean_search.c | 16 ++++++++++++++-- storage/myisam/ft_nlq_search.c | 18 +++++++++++++++++- 2 files changed, 31 insertions(+), 3 deletions(-) diff --git a/storage/myisam/ft_boolean_search.c b/storage/myisam/ft_boolean_search.c index 62d912a0fd0..16cf2669c6d 100644 --- a/storage/myisam/ft_boolean_search.c +++ b/storage/myisam/ft_boolean_search.c @@ -354,7 +354,7 @@ static int _ftb_no_dupes_cmp(void* not_used __attribute__((unused)), returns 1 if the search was finished (must-word wasn't found) */ -static int _ft2_search(FTB *ftb, FTB_WORD *ftbw, my_bool init_search) +static int _ft2_search_no_lock(FTB *ftb, FTB_WORD *ftbw, my_bool init_search) { int r; int subkeys=1; @@ -454,7 +454,7 @@ static int _ft2_search(FTB *ftb, FTB_WORD *ftbw, my_bool init_search) ftbw->key_root=info->s->state.key_root[ftb->keynr]; ftbw->keyinfo=info->s->keyinfo+ftb->keynr; ftbw->off=0; - return _ft2_search(ftb, ftbw, 0); + return _ft2_search_no_lock(ftb, ftbw, 0); } /* matching key found */ @@ -482,6 +482,18 @@ static int _ft2_search(FTB *ftb, FTB_WORD *ftbw, my_bool init_search) return 0; } +static int _ft2_search(FTB *ftb, FTB_WORD *ftbw, my_bool init_search) +{ + int r; + MYISAM_SHARE *share= ftb->info->s; + if (share->concurrent_insert) + rw_rdlock(&share->key_root_lock[ftb->keynr]); + r= _ft2_search_no_lock(ftb, ftbw, init_search); + if (share->concurrent_insert) + rw_unlock(&share->key_root_lock[ftb->keynr]); + return r; +} + static void _ftb_init_index_search(FT_INFO *ftb) { int i; diff --git a/storage/myisam/ft_nlq_search.c b/storage/myisam/ft_nlq_search.c index 333ec5d0b4f..c74451828a4 100644 --- a/storage/myisam/ft_nlq_search.c +++ b/storage/myisam/ft_nlq_search.c @@ -71,9 +71,10 @@ static int walk_and_match(FT_WORD *word, uint32 count, ALL_IN_ONE *aio) TREE_ELEMENT *selem; double gweight=1; MI_INFO *info=aio->info; + MYISAM_SHARE *share= info->s; uchar *keybuff=aio->keybuff; MI_KEYDEF *keyinfo=info->s->keyinfo+aio->keynr; - my_off_t key_root=info->s->state.key_root[aio->keynr]; + my_off_t key_root; uint extra= HA_FT_WLEN + info->s->rec_reflength; #if HA_FT_WTYPE == HA_KEYTYPE_FLOAT float tmp_weight; @@ -89,6 +90,11 @@ static int walk_and_match(FT_WORD *word, uint32 count, ALL_IN_ONE *aio) keylen-=HA_FT_WLEN; doc_cnt=0; + if (share->concurrent_insert) + rw_rdlock(&share->key_root_lock[aio->keynr]); + + key_root= share->state.key_root[aio->keynr]; + /* Skip rows inserted by current inserted */ for (r=_mi_search(info, keyinfo, keybuff, keylen, SEARCH_FIND, key_root) ; !r && @@ -98,6 +104,9 @@ static int walk_and_match(FT_WORD *word, uint32 count, ALL_IN_ONE *aio) info->lastkey_length, SEARCH_BIGGER, key_root)) ; + if (share->concurrent_insert) + rw_unlock(&share->key_root_lock[aio->keynr]); + info->update|= HA_STATE_AKTIV; /* for _mi_test_if_changed() */ /* The following should be safe, even if we compare doubles */ @@ -121,6 +130,8 @@ static int walk_and_match(FT_WORD *word, uint32 count, ALL_IN_ONE *aio) keyinfo=& info->s->ft2_keyinfo; key_root=info->lastpos; keylen=0; + if (share->concurrent_insert) + rw_rdlock(&share->key_root_lock[aio->keynr]); r=_mi_search_first(info, keyinfo, key_root); goto do_skip; } @@ -155,6 +166,9 @@ static int walk_and_match(FT_WORD *word, uint32 count, ALL_IN_ONE *aio) if (gweight < 0 || doc_cnt > 2000000) gweight=0; + if (share->concurrent_insert) + rw_rdlock(&share->key_root_lock[aio->keynr]); + if (_mi_test_if_changed(info) == 0) r=_mi_search_next(info, keyinfo, info->lastkey, info->lastkey_length, SEARCH_BIGGER, key_root); @@ -167,6 +181,8 @@ do_skip: r= _mi_search_next(info, keyinfo, info->lastkey, info->lastkey_length, SEARCH_BIGGER, key_root); + if (share->concurrent_insert) + rw_unlock(&share->key_root_lock[aio->keynr]); } word->weight=gweight; From 7a6c449c62ae86872aeef489895e1f016b921da6 Mon Sep 17 00:00:00 2001 From: Annamalai Gurusami Date: Wed, 16 May 2012 15:23:56 +0530 Subject: [PATCH 007/164] Bug #13943231: ALTER TABLE AFTER DISCARD MAY CRASH THE SERVER The following scenario crashes our mysql server: 1. set global innodb_file_per_table=1; 2. create table t1(c1 int) engine=innodb; 3. alter table t1 discard tablespace; 4. alter table t1 add unique index(c1); Step 4 crashes the server. This patch introduces a check on discarded tablespace to avoid the crash. rb://1041 approved by Marko Makela --- storage/innodb_plugin/handler/handler0alter.cc | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/storage/innodb_plugin/handler/handler0alter.cc b/storage/innodb_plugin/handler/handler0alter.cc index e2702b157af..6f02b500d96 100644 --- a/storage/innodb_plugin/handler/handler0alter.cc +++ b/storage/innodb_plugin/handler/handler0alter.cc @@ -665,6 +665,10 @@ ha_innobase::add_index( DBUG_RETURN(HA_ERR_NO_SUCH_TABLE); } + if (innodb_table->tablespace_discarded) { + DBUG_RETURN(-1); + } + /* Check that index keys are sensible */ error = innobase_check_index_keys(key_info, num_of_keys, innodb_table); From 0581d1c46c1bbe3f87ac4cef697af3b75392b815 Mon Sep 17 00:00:00 2001 From: Mayank Prasad Date: Thu, 17 May 2012 22:24:23 +0530 Subject: [PATCH 008/164] Bug#11766101 : 59140: LIKE CONCAT('%',@A,'%') DOESN'T MATCH WHEN @A CONTAINS LATIN1 STRING Issue/Cause: Issue is of memory corruption.During optimization phase, pattern to be matched in where clause, is prepared. This is done in Item_func_concat::val_str() function which forms the resultant string (tmp_value) and return its pointer. In caller, Item_func_like::fix_fields, pattern is made to point to this string (tmp_value). In further processing, tmp_value is getting modified which causes pattern to have changed/wrong values. Fix: Allocate its own memroy location in caller, copy value of resultant string (tmp_value) into that and make pattern to point to that. This makes sure no further changes to tmp_value will affect pattern. --- sql/item_cmpfunc.cc | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sql/item_cmpfunc.cc b/sql/item_cmpfunc.cc index fb9878ccb0a..657bc3ed234 100644 --- a/sql/item_cmpfunc.cc +++ b/sql/item_cmpfunc.cc @@ -4877,8 +4877,8 @@ bool Item_func_like::fix_fields(THD *thd, Item **ref) } if (canDoTurboBM) { - pattern = first + 1; pattern_len = (int) len - 2; + pattern = thd->strmake(first + 1, pattern_len); DBUG_PRINT("info", ("Initializing pattern: '%s'", first)); int *suff = (int*) thd->alloc((int) (sizeof(int)* ((pattern_len + 1)*2+ From 02f90402c8218227c81f86f0b56cd283f7a2eb64 Mon Sep 17 00:00:00 2001 From: Tor Didriksen Date: Fri, 18 May 2012 12:57:38 +0200 Subject: [PATCH 009/164] Bug#14039955 RPAD FUNCTION LEADS TO UNINITIALIZED VALUES WARNING IN MY_STRTOD Rewrite the "parser" in my_strtod_int() to avoid reading past the end of the input string. --- strings/dtoa.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) diff --git a/strings/dtoa.c b/strings/dtoa.c index ef1c141ec44..4086bf412fe 100644 --- a/strings/dtoa.c +++ b/strings/dtoa.c @@ -1416,20 +1416,27 @@ static double my_strtod_int(const char *s00, char **se, int *error, char *buf, s c= *++s; if (!nd) { - for (; s < end && c == '0'; c= *++s) + for (; s < end; ++s) + { + c= *s; + if (c != '0') + break; nz++; + } if (s < end && c > '0' && c <= '9') { s0= s; nf+= nz; nz= 0; - goto have_dig; } - goto dig_done; + else + goto dig_done; } - for (; s < end && c >= '0' && c <= '9'; c = *++s) + for (; s < end; ++s) { - have_dig: + c= *s; + if (c < '0' || c > '9') + break; /* Here we are parsing the fractional part. We can stop counting digits after a while: the extra digits From f436b188e24e35e155497bbcdae7c8b2c97cb2e5 Mon Sep 17 00:00:00 2001 From: Mattias Jonsson Date: Tue, 15 May 2012 12:45:52 +0200 Subject: [PATCH 010/164] bug#13949735: crash regression from bug#13694811. There can be cases when the optimizer calls ha_partition::records_in_range when there are no matching partitions. So the DBUG_ASSERT of !tot_used_partitions does assert. Fixed by returning 0 instead when no matching partitions are found. This will avoid the crash. records_in_range will then try to find the biggest used partition, which will not find any partition and records_in_range will then return 0, meaning non rows can be found. Patch contributed by Davi Arnaut at twitter. --- sql/ha_partition.cc | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/sql/ha_partition.cc b/sql/ha_partition.cc index 5b25bd26298..1debc02d7f2 100644 --- a/sql/ha_partition.cc +++ b/sql/ha_partition.cc @@ -6322,7 +6322,17 @@ ha_rows ha_partition::min_rows_for_estimate() DBUG_ENTER("ha_partition::min_rows_for_estimate"); tot_used_partitions= bitmap_bits_set(&m_part_info->used_partitions); - DBUG_ASSERT(tot_used_partitions); + + /* + All partitions might have been left as unused during partition pruning + due to, for example, an impossible WHERE condition. Nonetheless, the + optimizer might still attempt to perform (e.g. range) analysis where an + estimate of the the number of rows is calculated using records_in_range. + Hence, to handle this and other possible cases, use zero as the minimum + number of rows to base the estimate on if no partition is being used. + */ + if (!tot_used_partitions) + DBUG_RETURN(0); /* Allow O(log2(tot_partitions)) increase in number of used partitions. From 5917c58a5d23e30ed33ca9559ac3a8010d182d40 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Marko=20M=C3=A4kel=C3=A4?= Date: Tue, 15 May 2012 15:04:39 +0300 Subject: [PATCH 011/164] Bug#14025221 FOREIGN KEY REFERENCES FREED MEMORY AFTER DROP INDEX dict_table_replace_index_in_foreign_list(): Replace the dropped index also in the foreign key constraints of child tables that are referencing this table. row_ins_check_foreign_constraint(): If the underlying index is missing, refuse the operation. rb:1051 approved by Jimmy Yang --- storage/innodb_plugin/dict/dict0dict.c | 22 ++++++++++++++++++++++ storage/innodb_plugin/row/row0ins.c | 6 ++---- 2 files changed, 24 insertions(+), 4 deletions(-) diff --git a/storage/innodb_plugin/dict/dict0dict.c b/storage/innodb_plugin/dict/dict0dict.c index df7ac85681c..cfeba015723 100644 --- a/storage/innodb_plugin/dict/dict0dict.c +++ b/storage/innodb_plugin/dict/dict0dict.c @@ -4872,6 +4872,28 @@ dict_table_replace_index_in_foreign_list( foreign->foreign_index = new_index; } } + + + for (foreign = UT_LIST_GET_FIRST(table->referenced_list); + foreign; + foreign = UT_LIST_GET_NEXT(referenced_list, foreign)) { + + dict_index_t* new_index; + + if (foreign->referenced_index == index) { + ut_ad(foreign->referenced_table == index->table); + + new_index = dict_foreign_find_index( + foreign->referenced_table, + foreign->referenced_col_names, + foreign->n_fields, index, + /*check_charsets=*/TRUE, /*check_null=*/FALSE); + ut_ad(new_index || !trx->check_foreigns); + ut_ad(!new_index || new_index->table == index->table); + + foreign->referenced_index = new_index; + } + } } /**********************************************************************//** diff --git a/storage/innodb_plugin/row/row0ins.c b/storage/innodb_plugin/row/row0ins.c index 2d4afa6c5ed..4994a91dd23 100644 --- a/storage/innodb_plugin/row/row0ins.c +++ b/storage/innodb_plugin/row/row0ins.c @@ -1296,7 +1296,8 @@ run_again: check_index = foreign->foreign_index; } - if (check_table == NULL || check_table->ibd_file_missing) { + if (check_table == NULL || check_table->ibd_file_missing + || check_index == NULL) { if (check_ref) { FILE* ef = dict_foreign_err_file; @@ -1331,9 +1332,6 @@ run_again: goto exit_func; } - ut_a(check_table); - ut_a(check_index); - if (check_table != table) { /* We already have a LOCK_IX on table, but not necessarily on check_table */ From 5d8b38df4c6166bb7f52d6602c2b7eb48628c233 Mon Sep 17 00:00:00 2001 From: Nuno Carvalho Date: Tue, 15 May 2012 22:06:48 +0100 Subject: [PATCH 012/164] BUG#11754117 - 45670: INTVAR_EVENTS FOR FILTERED-OUT QUERY_LOG_EVENTS ARE EXECUTED Improved random number filtering verification on rpl_filter_tables_not_exist test. --- .../rpl/r/rpl_filter_tables_not_exist.result | 9 +++++---- .../rpl/t/rpl_filter_tables_not_exist.test | 17 +++++++++-------- 2 files changed, 14 insertions(+), 12 deletions(-) diff --git a/mysql-test/suite/rpl/r/rpl_filter_tables_not_exist.result b/mysql-test/suite/rpl/r/rpl_filter_tables_not_exist.result index f0dc97b71f2..e11c54499fe 100644 --- a/mysql-test/suite/rpl/r/rpl_filter_tables_not_exist.result +++ b/mysql-test/suite/rpl/r/rpl_filter_tables_not_exist.result @@ -114,17 +114,17 @@ id c 3 3 [on master] drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9; -CREATE TABLE test.t5 (a INT AUTO_INCREMENT PRIMARY KEY, b INT, c INT); +CREATE TABLE test.t5 (a INT AUTO_INCREMENT PRIMARY KEY, b DECIMAL(20,20), c INT); CREATE TABLE test.t1 (a INT); INSERT INTO test.t1 VALUES(1); call mtr.add_suppression("Unsafe statement written to the binary log using statement format since BINLOG_FORMAT = STATEMENT"); -CREATE TABLE test.t_slave (a INT AUTO_INCREMENT PRIMARY KEY, b INT, c INT); +CREATE TABLE test.t_slave (a INT AUTO_INCREMENT PRIMARY KEY, b DECIMAL(20,20), c INT); CREATE TRIGGER t1_update AFTER UPDATE ON test.t1 FOR EACH ROW -INSERT INTO test.t_slave VALUES(NULL, ROUND(RAND() * 1000), @c); +INSERT INTO test.t_slave VALUES(NULL, RAND(), @c); SET INSERT_ID=2; SET @c=2; SET @@rand_seed1=10000000, @@rand_seed2=1000000; -INSERT INTO t5 VALUES (NULL, ROUND(RAND() * 1000), @c); +INSERT INTO t5 VALUES (NULL, RAND(), @c); Warnings: Note 1592 Statement may not be safe to log in statement format. SELECT b into @b FROM test.t5; @@ -132,6 +132,7 @@ UPDATE test.t1 SET a=2; SELECT a AS 'ONE' into @a FROM test.t_slave; SELECT c AS 'NULL' into @c FROM test.t_slave; SELECT b into @b FROM test.t_slave; +include/assert.inc [Random values from master and slave must be different] drop table test.t5; drop table test.t1; drop table test.t_slave; diff --git a/mysql-test/suite/rpl/t/rpl_filter_tables_not_exist.test b/mysql-test/suite/rpl/t/rpl_filter_tables_not_exist.test index b62a6e96437..3572dd53ea7 100644 --- a/mysql-test/suite/rpl/t/rpl_filter_tables_not_exist.test +++ b/mysql-test/suite/rpl/t/rpl_filter_tables_not_exist.test @@ -215,21 +215,23 @@ drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9; # be filtered as well. # connection master; -CREATE TABLE test.t5 (a INT AUTO_INCREMENT PRIMARY KEY, b INT, c INT); # ignored on slave +# Although RAND() is from 0 to 1.0, DECIMAL(M,D), requires that M must be >= D. +CREATE TABLE test.t5 (a INT AUTO_INCREMENT PRIMARY KEY, b DECIMAL(20,20), c INT); # ignored on slave CREATE TABLE test.t1 (a INT); # accepted on slave INSERT INTO test.t1 VALUES(1); --sync_slave_with_master call mtr.add_suppression("Unsafe statement written to the binary log using statement format since BINLOG_FORMAT = STATEMENT"); -CREATE TABLE test.t_slave (a INT AUTO_INCREMENT PRIMARY KEY, b INT, c INT); +# Although RAND() is from 0 to 1.0, DECIMAL(M,D), requires that M must be >= D. +CREATE TABLE test.t_slave (a INT AUTO_INCREMENT PRIMARY KEY, b DECIMAL(20,20), c INT); CREATE TRIGGER t1_update AFTER UPDATE ON test.t1 FOR EACH ROW - INSERT INTO test.t_slave VALUES(NULL, ROUND(RAND() * 1000), @c); + INSERT INTO test.t_slave VALUES(NULL, RAND(), @c); connection master; SET INSERT_ID=2; SET @c=2; SET @@rand_seed1=10000000, @@rand_seed2=1000000; -INSERT INTO t5 VALUES (NULL, ROUND(RAND() * 1000), @c); # to be ignored +INSERT INTO t5 VALUES (NULL, RAND(), @c); # to be ignored SELECT b into @b FROM test.t5; --let $b_master=`select @b` UPDATE test.t1 SET a=2; # to run trigger on slave @@ -253,10 +255,9 @@ if (`SELECT @a != 2 and @c != NULL`) SELECT b into @b FROM test.t_slave; --let $b_slave=`select @b` -if (`SELECT $b_slave = $b_master`) -{ - --echo Might be pure coincidence of two randoms from master and slave table. Don not panic yet. -} +--let $assert_text= Random values from master and slave must be different +--let $assert_cond= $b_master != $b_slave +--source include/assert.inc # cleanup BUG#11754117 connection master; From bcb5d73767fbc04c88d3c8b05eafbdc9a905ea1f Mon Sep 17 00:00:00 2001 From: Annamalai Gurusami Date: Wed, 16 May 2012 11:17:48 +0530 Subject: [PATCH 013/164] Bug #12752572 61579: REPLICATION FAILURE WHILE INNODB_AUTOINC_LOCK_MODE=1 AND USING TRIGGER When an insert stmt like "insert into t values (1),(2),(3)" is executed, the autoincrement values assigned to these three rows are expected to be contiguous. In the given lock mode (innodb_autoinc_lock_mode=1), the auto inc lock will be released before the end of the statement. So to make the autoincrement contiguous for a given statement, we need to reserve the auto inc values at the beginning of the statement. rb://1074 approved by Alexander Nozdrin --- sql/handler.cc | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/sql/handler.cc b/sql/handler.cc index d2eaab19ad8..20bf2355c25 100644 --- a/sql/handler.cc +++ b/sql/handler.cc @@ -2397,6 +2397,17 @@ int handler::update_auto_increment() reservation means potentially losing unused values). Note that in prelocked mode no estimation is given. */ + + /* + For multi-row inserts, if the bulk inserts cannot be started, the + handler::estimation_rows_to_insert will not be set. Set it here. + */ + if ((estimation_rows_to_insert == 0) && + (thd->lex->many_values.elements > 0)) + { + estimation_rows_to_insert= thd->lex->many_values.elements; + } + if ((auto_inc_intervals_count == 0) && (estimation_rows_to_insert > 0)) nb_desired_values= estimation_rows_to_insert; else /* go with the increasing defaults */ @@ -4690,6 +4701,8 @@ int handler::ha_write_row(uchar *buf) DBUG_RETURN(error); if (unlikely(error= binlog_log_row(table, 0, buf, log_func))) DBUG_RETURN(error); /* purecov: inspected */ + + DEBUG_SYNC_C("ha_write_row_end"); DBUG_RETURN(0); } From 6b05e434bff43365add2a9636edbace157c84e89 Mon Sep 17 00:00:00 2001 From: Venkata Sidagam Date: Wed, 16 May 2012 16:14:27 +0530 Subject: [PATCH 014/164] Bug #13955256: KEYCACHE CRASHES, CORRUPTIONS/HANGS WITH, FULLTEXT INDEX AND CONCURRENT DML. Problem Statement: ------------------ 1) Create a table with FT index. 2) Enable concurrent inserts. 3) In multiple threads do below operations repeatedly a) truncate table b) insert into table .... c) select ... match .. against .. non-boolean/boolean mode After some time we could observe two different assert core dumps Analysis: -------- 1)assert core dump at key_read_cache(): Two select threads operating in-parallel on same key root block. 1st select thread block->status is set to BLOCK_ERROR because the my_pread() in read_block() is returning '0'. Truncate table made the index file size as 1024 and pread was asked to get the block of count bytes(1024 bytes) from offset of 1024 which it cannot read since its "end of file" and retuning '0' setting "my_errno= HA_ERR_FILE_TOO_SHORT" and the key_file_length, key_root[0] is same i.e. 1024. Since block status has BLOCK_ERROR the 1st select thread enter into the free_block() and will be under wait on conditional mutex by making status as BLOCK_REASSIGNED and goes for wait_on_readers(). Other select thread will also work on the same block and sees the status as BLOCK_ERROR and enters into free_block(), checks for BLOCK_REASSIGNED and asserting the server. 2)assert core dump at key_write_cache(): One select thread and One insert thread. Select thread gets the unlocks the 'keycache->cache_lock', which allows other threads to continue and gets the pread() return value as'0'(please see the explanation above) and tries to get the lock on 'keycache->cache_lock' and waits there for the lock. Insert thread requests for the block, block will be assigned from the hash list and makes the page_status as 'PAGE_WAIT_TO_BE_READ' and goes for the read_block(), waits in the queue since there are some other threads performing reads on the same block. Select thread which was waiting for the 'keycache->cache_lock' mutex in the read_block() will continue after getting the my_pread() value as '0' and sets the block status as BLOCK_ERROR and goes to the free_block() and go to the wait_for_readers(). Now the insert thread will awake and continues. and checks block->status as not BLOCK_READ and it asserts. Fix: --- In the full text code, multiple readers of index file is not guarded. Hence added below below code in _ft2_search() and walk_and_match(). to lock the key_root I have used below code in _ft2_search() if (info->s->concurrent_insert) mysql_rwlock_rdlock(&share->key_root_lock[0]); and to unlock if (info->s->concurrent_insert) mysql_rwlock_unlock(&share->key_root_lock[0]); storage/myisam/ft_boolean_search.c: Since its a recursion function, to avoid confusion in taking and releasing the locks, renamed _ft2_search() to _ft2_search_internal() function. And _ft2_search() will take the lock, call _ft2_search_internal() and release the lock in case of concurrent inserts. storage/myisam/ft_nlq_search.c: Added read locks code in walk_and_match() --- storage/myisam/ft_boolean_search.c | 16 ++++++++++++++-- storage/myisam/ft_nlq_search.c | 18 +++++++++++++++++- 2 files changed, 31 insertions(+), 3 deletions(-) diff --git a/storage/myisam/ft_boolean_search.c b/storage/myisam/ft_boolean_search.c index 62d912a0fd0..16cf2669c6d 100644 --- a/storage/myisam/ft_boolean_search.c +++ b/storage/myisam/ft_boolean_search.c @@ -354,7 +354,7 @@ static int _ftb_no_dupes_cmp(void* not_used __attribute__((unused)), returns 1 if the search was finished (must-word wasn't found) */ -static int _ft2_search(FTB *ftb, FTB_WORD *ftbw, my_bool init_search) +static int _ft2_search_no_lock(FTB *ftb, FTB_WORD *ftbw, my_bool init_search) { int r; int subkeys=1; @@ -454,7 +454,7 @@ static int _ft2_search(FTB *ftb, FTB_WORD *ftbw, my_bool init_search) ftbw->key_root=info->s->state.key_root[ftb->keynr]; ftbw->keyinfo=info->s->keyinfo+ftb->keynr; ftbw->off=0; - return _ft2_search(ftb, ftbw, 0); + return _ft2_search_no_lock(ftb, ftbw, 0); } /* matching key found */ @@ -482,6 +482,18 @@ static int _ft2_search(FTB *ftb, FTB_WORD *ftbw, my_bool init_search) return 0; } +static int _ft2_search(FTB *ftb, FTB_WORD *ftbw, my_bool init_search) +{ + int r; + MYISAM_SHARE *share= ftb->info->s; + if (share->concurrent_insert) + rw_rdlock(&share->key_root_lock[ftb->keynr]); + r= _ft2_search_no_lock(ftb, ftbw, init_search); + if (share->concurrent_insert) + rw_unlock(&share->key_root_lock[ftb->keynr]); + return r; +} + static void _ftb_init_index_search(FT_INFO *ftb) { int i; diff --git a/storage/myisam/ft_nlq_search.c b/storage/myisam/ft_nlq_search.c index 333ec5d0b4f..c74451828a4 100644 --- a/storage/myisam/ft_nlq_search.c +++ b/storage/myisam/ft_nlq_search.c @@ -71,9 +71,10 @@ static int walk_and_match(FT_WORD *word, uint32 count, ALL_IN_ONE *aio) TREE_ELEMENT *selem; double gweight=1; MI_INFO *info=aio->info; + MYISAM_SHARE *share= info->s; uchar *keybuff=aio->keybuff; MI_KEYDEF *keyinfo=info->s->keyinfo+aio->keynr; - my_off_t key_root=info->s->state.key_root[aio->keynr]; + my_off_t key_root; uint extra= HA_FT_WLEN + info->s->rec_reflength; #if HA_FT_WTYPE == HA_KEYTYPE_FLOAT float tmp_weight; @@ -89,6 +90,11 @@ static int walk_and_match(FT_WORD *word, uint32 count, ALL_IN_ONE *aio) keylen-=HA_FT_WLEN; doc_cnt=0; + if (share->concurrent_insert) + rw_rdlock(&share->key_root_lock[aio->keynr]); + + key_root= share->state.key_root[aio->keynr]; + /* Skip rows inserted by current inserted */ for (r=_mi_search(info, keyinfo, keybuff, keylen, SEARCH_FIND, key_root) ; !r && @@ -98,6 +104,9 @@ static int walk_and_match(FT_WORD *word, uint32 count, ALL_IN_ONE *aio) info->lastkey_length, SEARCH_BIGGER, key_root)) ; + if (share->concurrent_insert) + rw_unlock(&share->key_root_lock[aio->keynr]); + info->update|= HA_STATE_AKTIV; /* for _mi_test_if_changed() */ /* The following should be safe, even if we compare doubles */ @@ -121,6 +130,8 @@ static int walk_and_match(FT_WORD *word, uint32 count, ALL_IN_ONE *aio) keyinfo=& info->s->ft2_keyinfo; key_root=info->lastpos; keylen=0; + if (share->concurrent_insert) + rw_rdlock(&share->key_root_lock[aio->keynr]); r=_mi_search_first(info, keyinfo, key_root); goto do_skip; } @@ -155,6 +166,9 @@ static int walk_and_match(FT_WORD *word, uint32 count, ALL_IN_ONE *aio) if (gweight < 0 || doc_cnt > 2000000) gweight=0; + if (share->concurrent_insert) + rw_rdlock(&share->key_root_lock[aio->keynr]); + if (_mi_test_if_changed(info) == 0) r=_mi_search_next(info, keyinfo, info->lastkey, info->lastkey_length, SEARCH_BIGGER, key_root); @@ -167,6 +181,8 @@ do_skip: r= _mi_search_next(info, keyinfo, info->lastkey, info->lastkey_length, SEARCH_BIGGER, key_root); + if (share->concurrent_insert) + rw_unlock(&share->key_root_lock[aio->keynr]); } word->weight=gweight; From ce9e6b5a9a8b10ec9b09ea4349c811cdff2ab95f Mon Sep 17 00:00:00 2001 From: Annamalai Gurusami Date: Wed, 16 May 2012 16:36:49 +0530 Subject: [PATCH 015/164] Bug #13943231: ALTER TABLE AFTER DISCARD MAY CRASH THE SERVER The following scenario crashes our mysql server: 1. set global innodb_file_per_table=1; 2. create table t1(c1 int) engine=innodb; 3. alter table t1 discard tablespace; 4. alter table t1 add unique index(c1); Step 4 crashes the server. This patch introduces a check on discarded tablespace to avoid the crash. rb://1041 approved by Marko Makela --- storage/innodb_plugin/handler/handler0alter.cc | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/storage/innodb_plugin/handler/handler0alter.cc b/storage/innodb_plugin/handler/handler0alter.cc index e2702b157af..6f02b500d96 100644 --- a/storage/innodb_plugin/handler/handler0alter.cc +++ b/storage/innodb_plugin/handler/handler0alter.cc @@ -665,6 +665,10 @@ ha_innobase::add_index( DBUG_RETURN(HA_ERR_NO_SUCH_TABLE); } + if (innodb_table->tablespace_discarded) { + DBUG_RETURN(-1); + } + /* Check that index keys are sensible */ error = innobase_check_index_keys(key_info, num_of_keys, innodb_table); From 932376f97ad4e085926ba39ddc61542561d95ea0 Mon Sep 17 00:00:00 2001 From: unknown Date: Thu, 17 May 2012 10:15:54 +0530 Subject: [PATCH 016/164] From 3e1758d36a76e1b5c2333b3a137446afb61f80fe Mon Sep 17 00:00:00 2001 From: unknown Date: Thu, 17 May 2012 11:41:46 +0100 Subject: [PATCH 017/164] From 21faded51e8389d72cc1a729a5e40a5e41aa4540 Mon Sep 17 00:00:00 2001 From: Gopal Shankar Date: Thu, 17 May 2012 18:07:59 +0530 Subject: [PATCH 018/164] Bug#12636001 : deadlock from thd_security_context PROBLEM: Threads end-up in deadlock due to locks acquired as described below, con1: Run Query on a table. It is important that this SELECT must back-off while trying to open the t1 and enter into wait_for_condition(). The SELECT then is blocked trying to lock mysys_var->mutex which is held by con3. The very significant fact here is that mysys_var->current_mutex will still point to LOCK_open, even if LOCK_open is no longer held by con1 at this point. con2: Try dropping table used in con1 or query some table. It will hold LOCK_open and be blocked trying to lock kernel_mutex held by con4. con3: Try killing the query run by con1. It will hold THD::LOCK_thd_data belonging to con1 while trying to lock mysys_var->current_mutex belonging to con1. But current_mutex will point to LOCK_open which is held by con2. con4: Get innodb engine status It will hold kernel_mutex, trying to lock THD::LOCK_thd_data belonging to con1 which is held by con3. So while technically only con2, con3 and con4 participate in the deadlock, con1's mysys_var->current_mutex pointing to LOCK_open is a vital component of the deadlock. CYCLE = (THD::LOCK_thd_data -> LOCK_open -> kernel_mutex -> THD::LOCK_thd_data) FIX: LOCK_thd_data has responsibility of protecting, 1) thd->query, thd->query_length 2) VIO 3) thd->mysys_var (used by KILL statement and shutdown) 4) THD during thread delete. Among above responsibilities, 1), 2)and (3,4) seems to be three independent group of responsibility. If there is different LOCK owning responsibility of (3,4), the above mentioned deadlock cycle can be avoid. This fix introduces LOCK_thd_kill to handle responsibility (3,4), which eliminates the deadlock issue. Note: The problem is not found in 5.5. Introduction MDL subsystem caused metadata locking responsibility to be moved from TDC/TC to MDL subsystem. Due to this, responsibility of LOCK_open is reduced. As the use of LOCK_open is removed in open_table() and mysql_rm_table() the above mentioned CYCLE does not form. Revision ID for changes, open_table() = dlenev@mysql.com-20100727133458-m3ua9oslnx8fbbvz mysql_rm_table() = jon.hauglid@oracle.com-20101116100012-kxep9txz2fxy3nmw --- sql/event_scheduler.cc | 4 ++-- sql/slave.cc | 4 ++-- sql/sql_base.cc | 2 ++ sql/sql_class.cc | 13 +++++++++++-- sql/sql_class.h | 16 ++++++++++++++-- sql/sql_parse.cc | 5 +++-- sql/sql_repl.cc | 4 ++-- 7 files changed, 36 insertions(+), 12 deletions(-) diff --git a/sql/event_scheduler.cc b/sql/event_scheduler.cc index a24c70a8494..d217d8d76cd 100755 --- a/sql/event_scheduler.cc +++ b/sql/event_scheduler.cc @@ -632,13 +632,13 @@ Event_scheduler::stop() DBUG_PRINT("info", ("Scheduler thread has id %lu", scheduler_thd->thread_id)); /* Lock from delete */ - pthread_mutex_lock(&scheduler_thd->LOCK_thd_data); + pthread_mutex_lock(&scheduler_thd->LOCK_thd_kill); /* This will wake up the thread if it waits on Queue's conditional */ sql_print_information("Event Scheduler: Killing the scheduler thread, " "thread id %lu", scheduler_thd->thread_id); scheduler_thd->awake(THD::KILL_CONNECTION); - pthread_mutex_unlock(&scheduler_thd->LOCK_thd_data); + pthread_mutex_unlock(&scheduler_thd->LOCK_thd_kill); /* thd could be 0x0, when shutting down */ sql_print_information("Event Scheduler: " diff --git a/sql/slave.cc b/sql/slave.cc index 0910d196583..437762cc318 100644 --- a/sql/slave.cc +++ b/sql/slave.cc @@ -515,7 +515,7 @@ terminate_slave_thread(THD *thd, int error; DBUG_PRINT("loop", ("killing slave thread")); - pthread_mutex_lock(&thd->LOCK_thd_data); + pthread_mutex_lock(&thd->LOCK_thd_kill); #ifndef DONT_USE_THR_ALARM /* Error codes from pthread_kill are: @@ -526,7 +526,7 @@ terminate_slave_thread(THD *thd, DBUG_ASSERT(err != EINVAL); #endif thd->awake(THD::NOT_KILLED); - pthread_mutex_unlock(&thd->LOCK_thd_data); + pthread_mutex_unlock(&thd->LOCK_thd_kill); /* There is a small chance that slave thread might miss the first diff --git a/sql/sql_base.cc b/sql/sql_base.cc index ca24830db63..2ce5ec81917 100644 --- a/sql/sql_base.cc +++ b/sql/sql_base.cc @@ -2203,6 +2203,8 @@ void wait_for_condition(THD *thd, pthread_mutex_t *mutex, pthread_cond_t *cond) */ pthread_mutex_unlock(mutex); + DEBUG_SYNC(thd, "waiting_for_table_unlock"); + DBUG_EXECUTE_IF("sleep_after_waiting_for_table", my_sleep(1000000);); pthread_mutex_lock(&thd->mysys_var->mutex); thd->mysys_var->current_mutex= 0; thd->mysys_var->current_cond= 0; diff --git a/sql/sql_class.cc b/sql/sql_class.cc index 2f3e8153cbd..0f6bd4c1954 100644 --- a/sql/sql_class.cc +++ b/sql/sql_class.cc @@ -365,6 +365,7 @@ extern "C" char *thd_security_context(THD *thd, char *buffer, unsigned int length, unsigned int max_query_len) { + DEBUG_SYNC(thd, "thd_security_context"); String str(buffer, length, &my_charset_latin1); const Security_context *sctx= &thd->main_security_ctx; char header[64]; @@ -695,6 +696,7 @@ THD::THD() active_vio = 0; #endif pthread_mutex_init(&LOCK_thd_data, MY_MUTEX_INIT_FAST); + pthread_mutex_init(&LOCK_thd_kill, MY_MUTEX_INIT_FAST); /* Variables with default values */ proc_info="login"; @@ -999,6 +1001,8 @@ THD::~THD() /* Ensure that no one is using THD */ pthread_mutex_lock(&LOCK_thd_data); pthread_mutex_unlock(&LOCK_thd_data); + pthread_mutex_lock(&LOCK_thd_kill); + pthread_mutex_unlock(&LOCK_thd_kill); add_to_status(&global_status_var, &status_var); /* Close connection */ @@ -1026,6 +1030,7 @@ THD::~THD() #endif mysys_var=0; // Safety (shouldn't be needed) pthread_mutex_destroy(&LOCK_thd_data); + pthread_mutex_destroy(&LOCK_thd_kill); #ifndef DBUG_OFF dbug_sentry= THD_SENTRY_GONE; #endif @@ -1104,9 +1109,11 @@ void add_diff_to_status(STATUS_VAR *to_var, STATUS_VAR *from_var, void THD::awake(THD::killed_state state_to_set) { DBUG_ENTER("THD::awake"); - DBUG_PRINT("enter", ("this: 0x%lx", (long) this)); + DBUG_PRINT("enter", ("this: 0x%lx thread_id=%lu killed_state=%d", + (long) this, thread_id, state_to_set)); THD_CHECK_SENTRY(this); - safe_mutex_assert_owner(&LOCK_thd_data); + safe_mutex_assert_not_owner(&LOCK_thd_data); + safe_mutex_assert_owner(&LOCK_thd_kill); killed= state_to_set; if (state_to_set != THD::KILL_QUERY) @@ -1127,7 +1134,9 @@ void THD::awake(THD::killed_state state_to_set) hack is not used. */ + pthread_mutex_lock(&LOCK_thd_data); close_active_vio(); + pthread_mutex_unlock(&LOCK_thd_data); } #endif } diff --git a/sql/sql_class.h b/sql/sql_class.h index 31d2c664aae..3ecf032db71 100644 --- a/sql/sql_class.h +++ b/sql/sql_class.h @@ -1342,11 +1342,23 @@ public: Protects THD data accessed from other threads: - thd->query and thd->query_length (used by SHOW ENGINE INNODB STATUS and SHOW PROCESSLIST - - thd->mysys_var (used by KILL statement and shutdown). - Is locked when THD is deleted. */ pthread_mutex_t LOCK_thd_data; + /** + - Protects thd->mysys_var (used during KILL statement and shutdown). + - Is Locked when THD is deleted. + + Note: This responsibility was earlier handled by LOCK_thd_data. + This lock is introduced to solve a deadlock issue waiting for + LOCK_thd_data. As this lock reduces responsibility of LOCK_thd_data + the deadlock issues is solved. + Caution: LOCK_thd_kill should not be taken while holding LOCK_thd_data. + THD::awake() currently takes LOCK_thd_data after holding + LOCK_thd_kill. + */ + pthread_mutex_t LOCK_thd_kill; + /* all prepared statements and cursors of this connection */ Statement_map stmt_map; /* diff --git a/sql/sql_parse.cc b/sql/sql_parse.cc index 729a963eef1..6c376d2c0da 100644 --- a/sql/sql_parse.cc +++ b/sql/sql_parse.cc @@ -7187,7 +7187,7 @@ uint kill_one_thread(THD *thd, ulong id, bool only_kill_query) continue; if (tmp->thread_id == id) { - pthread_mutex_lock(&tmp->LOCK_thd_data); // Lock from delete + pthread_mutex_lock(&tmp->LOCK_thd_kill); // Lock from delete break; } } @@ -7215,12 +7215,13 @@ uint kill_one_thread(THD *thd, ulong id, bool only_kill_query) if ((thd->security_ctx->master_access & SUPER_ACL) || thd->security_ctx->user_matches(tmp->security_ctx)) { + DEBUG_SYNC(thd, "kill_one_thread_before_kill"); tmp->awake(only_kill_query ? THD::KILL_QUERY : THD::KILL_CONNECTION); error=0; } else error=ER_KILL_DENIED_ERROR; - pthread_mutex_unlock(&tmp->LOCK_thd_data); + pthread_mutex_unlock(&tmp->LOCK_thd_kill); } DBUG_PRINT("exit", ("%d", error)); DBUG_RETURN(error); diff --git a/sql/sql_repl.cc b/sql/sql_repl.cc index b985805a827..c92d2db2c1e 100644 --- a/sql/sql_repl.cc +++ b/sql/sql_repl.cc @@ -1133,7 +1133,7 @@ void kill_zombie_dump_threads(uint32 slave_server_id) if (tmp->command == COM_BINLOG_DUMP && tmp->server_id == slave_server_id) { - pthread_mutex_lock(&tmp->LOCK_thd_data); // Lock from delete + pthread_mutex_lock(&tmp->LOCK_thd_kill); // Lock from delete break; } } @@ -1146,7 +1146,7 @@ void kill_zombie_dump_threads(uint32 slave_server_id) again. We just to do kill the thread ourselves. */ tmp->awake(THD::KILL_QUERY); - pthread_mutex_unlock(&tmp->LOCK_thd_data); + pthread_mutex_unlock(&tmp->LOCK_thd_kill); } } From 781137c0dddc3c9315a8d40e579fe82f6a900d61 Mon Sep 17 00:00:00 2001 From: Rohit Kalhans Date: Fri, 18 May 2012 14:44:40 +0530 Subject: [PATCH 019/164] BUG#14005409 - 64624 Problem: After the fix for Bug#12589870, a new field that stores the length of db name was added in the buffer that stores the query to be executed. Unlike for the plain user session, the replication execution did not allocate the necessary chunk in Query-event constructor. This caused an invalid read while accessing this field. Solution: We fix this problem by allocating a necessary chunk in the buffer created in the Query_log_event::Query_log_event() and store the length of database name. sql/log_event.cc: Added a new field in the buffer created in the Query_log_event's constructor and store the length of database name. --- sql/log_event.cc | 50 ++++++++++++++++++++++++++++++++---------------- 1 file changed, 34 insertions(+), 16 deletions(-) diff --git a/sql/log_event.cc b/sql/log_event.cc index 8606964113c..afcc283a6d1 100644 --- a/sql/log_event.cc +++ b/sql/log_event.cc @@ -2835,24 +2835,34 @@ Query_log_event::Query_log_event(const char* buf, uint event_len, pos= (const uchar*) end; // Break loop } } - + + /** + Layout for the data buffer is as follows + +--------+-----------+------+------+---------+----+-------+ + | catlog | time_zone | user | host | db name | \0 | Query | + +--------+-----------+------+------+---------+----+-------+ + + To support the query cache we append the following buffer to the above + +-------+----------------------------------------+-------+ + |db len | uninitiatlized space of size of db len | FLAGS | + +-------+----------------------------------------+-------+ + + The area of buffer starting from Query field all the way to the end belongs + to the Query buffer and its structure is described in alloc_query() in + sql_parse.cc + */ + + if (!(start= data_buf = (Log_event::Byte*) my_malloc(catalog_len + 1 + + time_zone_len + 1 + + user.length + 1 + + host.length + 1 + + data_len + 1 #if !defined(MYSQL_CLIENT) && defined(HAVE_QUERY_CACHE) - if (!(start= data_buf = (Log_event::Byte*) my_malloc(catalog_len + 1 + - time_zone_len + 1 + - data_len + 1 + - QUERY_CACHE_FLAGS_SIZE + - user.length + 1 + - host.length + 1 + - db_len + 1, - MYF(MY_WME)))) -#else - if (!(start= data_buf = (Log_event::Byte*) my_malloc(catalog_len + 1 + - time_zone_len + 1 + - data_len + 1 + - user.length + 1 + - host.length + 1, - MYF(MY_WME)))) + + sizeof(size_t)//for db_len + + db_len + 1 + + QUERY_CACHE_FLAGS_SIZE #endif + , MYF(MY_WME)))) DBUG_VOID_RETURN; if (catalog_len) // If catalog is given { @@ -2891,6 +2901,14 @@ Query_log_event::Query_log_event(const char* buf, uint event_len, db= (char *)start; query= (char *)(start + db_len + 1); q_len= data_len - db_len -1; + /** + Append the db length at the end of the buffer. This will be used by + Query_cache::send_result_to_client() in case the query cache is On. + */ +#if !defined(MYSQL_CLIENT) && defined(HAVE_QUERY_CACHE) + size_t db_length= (size_t)db_len; + memcpy(start + data_len + 1, &db_length, sizeof(size_t)); +#endif DBUG_VOID_RETURN; } From 1605b7f68f30038ea0a9ce16e688f5827057f64f Mon Sep 17 00:00:00 2001 From: Manish Kumar Date: Mon, 21 May 2012 12:57:39 +0530 Subject: [PATCH 020/164] BUG#12400221 - 60926: BINARY LOG EVENTS LARGER THAN MAX_ALLOWED_PACKET Problem ======== SQL statements close to the size of max_allowed_packet produce binary log events larger than max_allowed_packet. The reason why this failure is occuring is because the event length is more than the total size of the max_allowed_packet + max_event_header length. Now since the event length exceeds this size master Dump thread is unable to send the packet on to the slave. That can happen e.g with row-based replication in Update_rows event. Fix ==== The problem was fixed by increasing the max_allowed_packet for the slave's threads (IO/SQL) by increasing it to 1GB. This is done using the new server option included which is used to regulate the max_allowed_packet of the slave thread (IO/SQL). This causes the large packets to be received by the slave and apply it successfully. sql/log_event.h: Added the new option in the log_event.h file. sql/mysqld.cc: Added a new option to the server. sql/slave.cc: Increasing the session max_allowed_packet to a large value , i.e. not taking global(max_allowed) into consideration, for the slave's threads. --- mysql-test/suite/rpl/r/rpl_log_pos.result | 2 +- mysql-test/suite/rpl/r/rpl_packet.result | 11 +- mysql-test/suite/rpl/t/rpl_packet-slave.opt | 2 +- mysql-test/suite/rpl/t/rpl_packet.test | 11 +- .../inc/slave_max_allowed_packet_basic.inc | 177 ++++++++++++++++++ .../r/max_allowed_packet_basic.result | 12 ++ .../sys_vars/r/max_allowed_packet_func.result | 2 + .../sys_vars/r/net_buffer_length_basic.result | 2 + .../t/slave_max_allowed_packet_basic.test | 3 + sql/log_event.cc | 2 +- sql/log_event.h | 7 + sql/mysql_priv.h | 1 + sql/mysqld.cc | 7 + sql/set_var.cc | 2 + sql/share/errmsg.txt | 34 ++-- sql/slave.cc | 11 +- sql/sql_repl.cc | 2 +- 17 files changed, 252 insertions(+), 36 deletions(-) create mode 100644 mysql-test/suite/sys_vars/inc/slave_max_allowed_packet_basic.inc create mode 100644 mysql-test/suite/sys_vars/t/slave_max_allowed_packet_basic.test diff --git a/mysql-test/suite/rpl/r/rpl_log_pos.result b/mysql-test/suite/rpl/r/rpl_log_pos.result index 91d307008f0..b2224dcd725 100644 --- a/mysql-test/suite/rpl/r/rpl_log_pos.result +++ b/mysql-test/suite/rpl/r/rpl_log_pos.result @@ -9,7 +9,7 @@ change master to master_log_pos=MASTER_LOG_POS; Read_Master_Log_Pos = '75' start slave; include/wait_for_slave_io_error.inc [errno=1236] -Last_IO_Error = 'Got fatal error 1236 from master when reading data from binary log: 'log event entry exceeded max_allowed_packet; Increase max_allowed_packet on master'' +Last_IO_Error = 'Got fatal error 1236 from master when reading data from binary log: 'binlog truncated in the middle of event'' include/stop_slave_sql.inc show master status; File Position Binlog_Do_DB Binlog_Ignore_DB diff --git a/mysql-test/suite/rpl/r/rpl_packet.result b/mysql-test/suite/rpl/r/rpl_packet.result index 7a7f8141ac8..6d68a094594 100644 --- a/mysql-test/suite/rpl/r/rpl_packet.result +++ b/mysql-test/suite/rpl/r/rpl_packet.result @@ -1,7 +1,7 @@ include/master-slave.inc [connection master] -call mtr.add_suppression("Slave I/O: Got a packet bigger than 'max_allowed_packet' bytes, Error_code: 1153"); -call mtr.add_suppression("Slave I/O: Got fatal error 1236 from master when reading data from binary log:"); +call mtr.add_suppression("Slave I/O: Got a packet bigger than 'slave_max_allowed_packet' bytes, Error_code: 1153"); +call mtr.add_suppression("Log entry on master is longer than slave_max_allowed_packet"); drop database if exists DB_NAME_OF_MAX_LENGTH_AKA_NAME_LEN_64_BYTES_____________________; create database DB_NAME_OF_MAX_LENGTH_AKA_NAME_LEN_64_BYTES_____________________; SET @@global.max_allowed_packet=1024; @@ -30,14 +30,14 @@ include/start_slave.inc CREATE TABLE `t1` (`f1` LONGTEXT) ENGINE=MyISAM; INSERT INTO `t1`(`f1`) VALUES ('aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa2048'); include/wait_for_slave_io_error.inc [errno=1153] -Last_IO_Error = 'Got a packet bigger than 'max_allowed_packet' bytes' +Last_IO_Error = 'Got a packet bigger than 'slave_max_allowed_packet' bytes' include/stop_slave_sql.inc include/rpl_reset.inc DROP TABLE t1; CREATE TABLE t1 (f1 int PRIMARY KEY, f2 LONGTEXT, f3 LONGTEXT) ENGINE=MyISAM; INSERT INTO t1(f1, f2, f3) VALUES(1, REPEAT('a', @@global.max_allowed_packet), REPEAT('b', @@global.max_allowed_packet)); -include/wait_for_slave_io_error.inc [errno=1236] -Last_IO_Error = 'Got fatal error 1236 from master when reading data from binary log: 'log event entry exceeded max_allowed_packet; Increase max_allowed_packet on master'' +include/wait_for_slave_io_error.inc [errno=1153] +Last_IO_Error = 'Got a packet bigger than 'slave_max_allowed_packet' bytes' STOP SLAVE; RESET SLAVE; RESET MASTER; @@ -52,6 +52,7 @@ SET @@global.max_allowed_packet= 1024; Warnings: Warning 1105 The value of 'max_allowed_packet' should be no less than the value of 'net_buffer_length' SET @@global.net_buffer_length= 1024; +SET @@global.slave_max_allowed_packet= 1073741824; DROP TABLE t1; RESET SLAVE; include/rpl_end.inc diff --git a/mysql-test/suite/rpl/t/rpl_packet-slave.opt b/mysql-test/suite/rpl/t/rpl_packet-slave.opt index 42d4f94c999..e0a7a203f99 100644 --- a/mysql-test/suite/rpl/t/rpl_packet-slave.opt +++ b/mysql-test/suite/rpl/t/rpl_packet-slave.opt @@ -1 +1 @@ --O max_allowed_packet=1024 -O net_buffer_length=1024 +-O max_allowed_packet=1024 -O net_buffer_length=1024 -O slave_max_allowed_packet=1024 diff --git a/mysql-test/suite/rpl/t/rpl_packet.test b/mysql-test/suite/rpl/t/rpl_packet.test index 3197b6160cd..7fbea87f71e 100644 --- a/mysql-test/suite/rpl/t/rpl_packet.test +++ b/mysql-test/suite/rpl/t/rpl_packet.test @@ -11,9 +11,8 @@ # max-out size db name source include/master-slave.inc; source include/have_binlog_format_row.inc; -call mtr.add_suppression("Slave I/O: Got a packet bigger than 'max_allowed_packet' bytes, Error_code: 1153"); -call mtr.add_suppression("Slave I/O: Got fatal error 1236 from master when reading data from binary log:"); - +call mtr.add_suppression("Slave I/O: Got a packet bigger than 'slave_max_allowed_packet' bytes, Error_code: 1153"); +call mtr.add_suppression("Log entry on master is longer than slave_max_allowed_packet"); let $db= DB_NAME_OF_MAX_LENGTH_AKA_NAME_LEN_64_BYTES_____________________; disable_warnings; eval drop database if exists $db; @@ -23,6 +22,7 @@ eval create database $db; connection master; let $old_max_allowed_packet= `SELECT @@global.max_allowed_packet`; let $old_net_buffer_length= `SELECT @@global.net_buffer_length`; +let $old_slave_max_allowed_packet= `SELECT @@global.slave_max_allowed_packet`; SET @@global.max_allowed_packet=1024; SET @@global.net_buffer_length=1024; @@ -124,8 +124,8 @@ INSERT INTO t1(f1, f2, f3) VALUES(1, REPEAT('a', @@global.max_allowed_packet), R connection slave; # The slave I/O thread must stop after receiving -# 1236=ER_MASTER_FATAL_ERROR_READING_BINLOG error message from master. ---let $slave_io_errno= 1236 +# 1153 = ER_NET_PACKET_TOO_LARGE +--let $slave_io_errno= 1153 --let $show_slave_io_error= 1 --source include/wait_for_slave_io_error.inc @@ -166,6 +166,7 @@ connection master; DROP TABLE t1; eval SET @@global.max_allowed_packet= $old_max_allowed_packet; eval SET @@global.net_buffer_length= $old_net_buffer_length; +eval SET @@global.slave_max_allowed_packet= $old_slave_max_allowed_packet; # slave is stopped connection slave; DROP TABLE t1; diff --git a/mysql-test/suite/sys_vars/inc/slave_max_allowed_packet_basic.inc b/mysql-test/suite/sys_vars/inc/slave_max_allowed_packet_basic.inc new file mode 100644 index 00000000000..4caaae84906 --- /dev/null +++ b/mysql-test/suite/sys_vars/inc/slave_max_allowed_packet_basic.inc @@ -0,0 +1,177 @@ +############## mysql-test\t\slave_max_allowed_packet_basic.test ################## +# # +# Variable Name: slave_max_allowed_packet # +# Scope: GLOBAL # +# Access Type: Dynamic # +# Data Type: numeric # +# Default Value:1073741824 # +# Range: 1024 - 1073741824 # +# # +# # +# # +# Description: Test Cases of Dynamic System Variable slave_max_allowed_packet # +# that checks the behavior of this variable in the following ways# +# * Default Value # +# * Valid & Invalid values # +# * Scope & Access method # +# * Data Integrity # +# # +############################################################################### + +--source include/load_sysvars.inc + +######################################################################## +# START OF slave_max_allowed_packet TESTS # +######################################################################## + + +########################################################################### +# Saving initial value of slave_max_allowed_packet in a temporary variable# +########################################################################### + +SET @start_value = @@global.slave_max_allowed_packet; +SELECT @start_value; + + +--echo '#--------------------FN_DYNVARS_072_01------------------------#' +######################################################################## +# Display the DEFAULT value of slave_max_allowed_packet # +######################################################################## + +SET @@global.slave_max_allowed_packet = 5000; +SET @@global.slave_max_allowed_packet = DEFAULT; +SELECT @@global.slave_max_allowed_packet; + + +--echo '#---------------------FN_DYNVARS_072_02-------------------------#' +############################################### +# Verify default value of variable # +############################################### + +SET @@global.slave_max_allowed_packet = @start_value; +SELECT @@global.slave_max_allowed_packet = 1073741824; +--echo 'Bug# 34876: Incorrect Default Value is assigned to variable'; + +--echo '#--------------------FN_DYNVARS_072_03------------------------#' +######################################################################## +# Change the value of slave_max_allowed_packet to a valid value # +######################################################################## + +SET @@global.slave_max_allowed_packet = 1024; +SELECT @@global.slave_max_allowed_packet; +SET @@global.slave_max_allowed_packet = 1073741824; +SELECT @@global.slave_max_allowed_packet; +SET @@global.slave_max_allowed_packet = 1073741824; +SELECT @@global.slave_max_allowed_packet; +SET @@global.slave_max_allowed_packet = 1025; +SELECT @@global.slave_max_allowed_packet; +SET @@global.slave_max_allowed_packet = 65535; +SELECT @@global.slave_max_allowed_packet; +--echo 'Bug# 34877: Invalid Values are coming in variable on assigning valid values'; + + +--echo '#--------------------FN_DYNVARS_072_04-------------------------#' +########################################################################### +# Change the value of slave_max_allowed_packet to invalid value # +########################################################################### + +SET @@global.slave_max_allowed_packet = -1; +SELECT @@global.slave_max_allowed_packet; +SET @@global.slave_max_allowed_packet = 100000000000; +SELECT @@global.slave_max_allowed_packet; +--Error ER_WRONG_TYPE_FOR_VAR +SET @@global.slave_max_allowed_packet = 10000.01; +SELECT @@global.slave_max_allowed_packet; +SET @@global.slave_max_allowed_packet = -1024; +SELECT @@global.slave_max_allowed_packet; +SET @@global.slave_max_allowed_packet = 4294967296; +SELECT @@global.slave_max_allowed_packet; +SET @@global.slave_max_allowed_packet = 1023; +SELECT @@global.slave_max_allowed_packet; + +--echo 'Bug # 34837: Errors are not coming on assigning invalid values to variable'; + +--Error ER_WRONG_TYPE_FOR_VAR +SET @@global.slave_max_allowed_packet = ON; +SELECT @@global.slave_max_allowed_packet; +--Error ER_WRONG_TYPE_FOR_VAR +SET @@global.slave_max_allowed_packet = 'test'; +SELECT @@global.slave_max_allowed_packet; + + +--echo '#-------------------FN_DYNVARS_072_05----------------------------#' +########################################################################### +# Test if accessing session slave_max_allowed_packet gives error # +########################################################################### + +--Error ER_GLOBAL_VARIABLE +SET @@session.slave_max_allowed_packet = 4096; +--Error ER_INCORRECT_GLOBAL_LOCAL_VAR +SELECT @@session.slave_max_allowed_packet; + + +--echo '#----------------------FN_DYNVARS_072_06------------------------#' +############################################################################## +# Check if the value in GLOBAL & SESSION Tables matches values in variable # +############################################################################## + +SELECT @@global.slave_max_allowed_packet = VARIABLE_VALUE +FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES +WHERE VARIABLE_NAME='slave_max_allowed_packet'; + +SELECT @@slave_max_allowed_packet = VARIABLE_VALUE +FROM INFORMATION_SCHEMA.SESSION_VARIABLES +WHERE VARIABLE_NAME='slave_max_allowed_packet'; + + +--echo '#---------------------FN_DYNVARS_072_07----------------------#' +################################################################### +# Check if TRUE and FALSE values can be used on variable # +################################################################### + +SET @@global.slave_max_allowed_packet = TRUE; +SELECT @@global.slave_max_allowed_packet; +SET @@global.slave_max_allowed_packet = FALSE; +SELECT @@global.slave_max_allowed_packet; + + +--echo '#---------------------FN_DYNVARS_072_08----------------------#' +######################################################################################################## +# Check if accessing variable with SESSION,LOCAL and without SCOPE points to same session variable # +######################################################################################################## + +SET @@global.slave_max_allowed_packet = 5000; +SELECT @@slave_max_allowed_packet = @@global.slave_max_allowed_packet; + + +--echo '#---------------------FN_DYNVARS_072_09----------------------#' +################################################################################ +# Check if slave_max_allowed_packet can be accessed with and without @@ sign # +################################################################################ + +--Error ER_GLOBAL_VARIABLE +SET slave_max_allowed_packet = 6000; +SELECT @@slave_max_allowed_packet; +--Error ER_PARSE_ERROR +SET local.slave_max_allowed_packet = 7000; +--Error ER_UNKNOWN_TABLE +SELECT local.slave_max_allowed_packet; +--Error ER_PARSE_ERROR +SET global.slave_max_allowed_packet = 8000; +--Error ER_UNKNOWN_TABLE +SELECT global.slave_max_allowed_packet; +--Error ER_BAD_FIELD_ERROR +SELECT slave_max_allowed_packet = @@session.slave_max_allowed_packet; + + +############################## +# Restore initial value # +############################## + +SET @@global.slave_max_allowed_packet = @start_value; +SELECT @@global.slave_max_allowed_packet; + + +######################################################################## +# END OF slave_max_allowed_packet TESTS # +######################################################################## diff --git a/mysql-test/suite/sys_vars/r/max_allowed_packet_basic.result b/mysql-test/suite/sys_vars/r/max_allowed_packet_basic.result index ca5b87f19cb..810ddb00b79 100644 --- a/mysql-test/suite/sys_vars/r/max_allowed_packet_basic.result +++ b/mysql-test/suite/sys_vars/r/max_allowed_packet_basic.result @@ -7,6 +7,7 @@ SET @@global.max_allowed_packet = DEFAULT; SET @@global.max_allowed_packet = 1000; Warnings: Warning 1292 Truncated incorrect max_allowed_packet value: '1000' +Warning 1105 The value of 'max_allowed_packet' should be no less than the value of 'net_buffer_length' SET @@global.max_allowed_packet = DEFAULT; SELECT @@global.max_allowed_packet; @@global.max_allowed_packet @@ -25,10 +26,14 @@ SELECT @@global.max_allowed_packet = 1048576; 1 '#--------------------FN_DYNVARS_070_03-------------------------#' SET @@global.max_allowed_packet = 1024; +Warnings: +Warning 1105 The value of 'max_allowed_packet' should be no less than the value of 'net_buffer_length' SELECT @@global.max_allowed_packet; @@global.max_allowed_packet 1024 SET @@global.max_allowed_packet = 1025; +Warnings: +Warning 1105 The value of 'max_allowed_packet' should be no less than the value of 'net_buffer_length' SELECT @@global.max_allowed_packet; @@global.max_allowed_packet 1024 @@ -71,18 +76,21 @@ SELECT @@session.max_allowed_packet; SET @@global.max_allowed_packet = 0; Warnings: Warning 1292 Truncated incorrect max_allowed_packet value: '0' +Warning 1105 The value of 'max_allowed_packet' should be no less than the value of 'net_buffer_length' SELECT @@global.max_allowed_packet; @@global.max_allowed_packet 1024 SET @@global.max_allowed_packet = -1024; Warnings: Warning 1292 Truncated incorrect max_allowed_packet value: '-1024' +Warning 1105 The value of 'max_allowed_packet' should be no less than the value of 'net_buffer_length' SELECT @@global.max_allowed_packet; @@global.max_allowed_packet 1024 SET @@global.max_allowed_packet = 1023; Warnings: Warning 1292 Truncated incorrect max_allowed_packet value: '1023' +Warning 1105 The value of 'max_allowed_packet' should be no less than the value of 'net_buffer_length' SELECT @@global.max_allowed_packet; @@global.max_allowed_packet 1024 @@ -146,17 +154,21 @@ WHERE VARIABLE_NAME='max_allowed_packet'; SET @@global.max_allowed_packet = TRUE; Warnings: Warning 1292 Truncated incorrect max_allowed_packet value: '1' +Warning 1105 The value of 'max_allowed_packet' should be no less than the value of 'net_buffer_length' SELECT @@global.max_allowed_packet; @@global.max_allowed_packet 1024 SET @@global.max_allowed_packet = FALSE; Warnings: Warning 1292 Truncated incorrect max_allowed_packet value: '0' +Warning 1105 The value of 'max_allowed_packet' should be no less than the value of 'net_buffer_length' SELECT @@global.max_allowed_packet; @@global.max_allowed_packet 1024 '#---------------------FN_DYNVARS_070_09----------------------#' SET @@global.max_allowed_packet = 2048; +Warnings: +Warning 1105 The value of 'max_allowed_packet' should be no less than the value of 'net_buffer_length' SELECT @@max_allowed_packet = @@global.max_allowed_packet; @@max_allowed_packet = @@global.max_allowed_packet 0 diff --git a/mysql-test/suite/sys_vars/r/max_allowed_packet_func.result b/mysql-test/suite/sys_vars/r/max_allowed_packet_func.result index 0d682b65aea..a202701b60f 100644 --- a/mysql-test/suite/sys_vars/r/max_allowed_packet_func.result +++ b/mysql-test/suite/sys_vars/r/max_allowed_packet_func.result @@ -23,6 +23,8 @@ SELECT @@session.net_buffer_length; '#--------------------FN_DYNVARS_070_02-------------------------#' ## Setting value of max_allowed packet and net_buffer_length to 1024 ## SET @@global.max_allowed_packet = 1024; +Warnings: +Warning 1105 The value of 'max_allowed_packet' should be no less than the value of 'net_buffer_length' SET @@global.net_buffer_length = 1024; SELECT @@global.max_allowed_packet; @@global.max_allowed_packet diff --git a/mysql-test/suite/sys_vars/r/net_buffer_length_basic.result b/mysql-test/suite/sys_vars/r/net_buffer_length_basic.result index 07f933b5a4b..026c883e501 100644 --- a/mysql-test/suite/sys_vars/r/net_buffer_length_basic.result +++ b/mysql-test/suite/sys_vars/r/net_buffer_length_basic.result @@ -63,12 +63,14 @@ SELECT @@global.net_buffer_length; SET @@global.net_buffer_length = 1048577; Warnings: Warning 1292 Truncated incorrect net_buffer_length value: '1048577' +Warning 1105 The value of 'max_allowed_packet' should be no less than the value of 'net_buffer_length' SELECT @@global.net_buffer_length; @@global.net_buffer_length 1048576 SET @@global.net_buffer_length = 104857633; Warnings: Warning 1292 Truncated incorrect net_buffer_length value: '104857633' +Warning 1105 The value of 'max_allowed_packet' should be no less than the value of 'net_buffer_length' SELECT @@global.net_buffer_length; @@global.net_buffer_length 1048576 diff --git a/mysql-test/suite/sys_vars/t/slave_max_allowed_packet_basic.test b/mysql-test/suite/sys_vars/t/slave_max_allowed_packet_basic.test new file mode 100644 index 00000000000..5b6a557738b --- /dev/null +++ b/mysql-test/suite/sys_vars/t/slave_max_allowed_packet_basic.test @@ -0,0 +1,3 @@ +--source suite/sys_vars/inc/slave_max_allowed_packet_basic.inc + + diff --git a/sql/log_event.cc b/sql/log_event.cc index afcc283a6d1..958b7e4ef36 100644 --- a/sql/log_event.cc +++ b/sql/log_event.cc @@ -1122,7 +1122,7 @@ failed my_b_read")); Log_event *res= 0; #ifndef max_allowed_packet THD *thd=current_thd; - uint max_allowed_packet= thd ? thd->variables.max_allowed_packet : ~(ulong)0; + uint max_allowed_packet= thd ? slave_max_allowed_packet:~(ulong)0; #endif if (data_len > max_allowed_packet) diff --git a/sql/log_event.h b/sql/log_event.h index 4c80148458c..39cd55f313e 100644 --- a/sql/log_event.h +++ b/sql/log_event.h @@ -275,6 +275,13 @@ struct sql_ex_info MAX_SIZE_LOG_EVENT_STATUS + /* status */ \ NAME_LEN + 1) +/* + The new option is added to handle large packets that are sent from the master + to the slave. It is used to increase the thd(max_allowed) for both the + DUMP thread on the master and the SQL/IO thread on the slave. +*/ +#define MAX_MAX_ALLOWED_PACKET 1024*1024*1024 + /* Event header offsets; these point to places inside the fixed header. diff --git a/sql/mysql_priv.h b/sql/mysql_priv.h index 359e84a3370..937617032dd 100644 --- a/sql/mysql_priv.h +++ b/sql/mysql_priv.h @@ -1944,6 +1944,7 @@ extern ulong slave_net_timeout, slave_trans_retries; extern uint max_user_connections; extern ulong what_to_log,flush_time; extern ulong query_buff_size; +extern ulong slave_max_allowed_packet; extern ulong max_prepared_stmt_count, prepared_stmt_count; extern ulong binlog_cache_size, open_files_limit; extern ulonglong max_binlog_cache_size; diff --git a/sql/mysqld.cc b/sql/mysqld.cc index 4a80fd043c8..db73504cb17 100644 --- a/sql/mysqld.cc +++ b/sql/mysqld.cc @@ -28,6 +28,7 @@ #include "mysys_err.h" #include "events.h" #include "debug_sync.h" +#include "log_event.h" #include "../storage/myisam/ha_myisam.h" @@ -574,6 +575,7 @@ static const char *slave_exec_mode_str= "STRICT"; ulong thread_cache_size=0, thread_pool_size= 0; ulong binlog_cache_size=0; ulonglong max_binlog_cache_size=0; +ulong slave_max_allowed_packet= 0; ulong query_cache_size=0; ulong refresh_version; /* Increments on each reload */ query_id_t global_query_id; @@ -5572,6 +5574,7 @@ enum options_mysqld OPT_KEY_CACHE_DIVISION_LIMIT, OPT_KEY_CACHE_AGE_THRESHOLD, OPT_LONG_QUERY_TIME, OPT_LOWER_CASE_TABLE_NAMES, OPT_MAX_ALLOWED_PACKET, + OPT_SLAVE_MAX_ALLOWED_PACKET, OPT_MAX_BINLOG_CACHE_SIZE, OPT_MAX_BINLOG_SIZE, OPT_MAX_CONNECTIONS, OPT_MAX_CONNECT_ERRORS, OPT_MAX_DELAYED_THREADS, OPT_MAX_HEP_TABLE_SIZE, @@ -6700,6 +6703,10 @@ thread is in the relay logs.", &global_system_variables.max_allowed_packet, &max_system_variables.max_allowed_packet, 0, GET_ULONG, REQUIRED_ARG, 1024*1024L, 1024, 1024L*1024L*1024L, MALLOC_OVERHEAD, 1024, 0}, + {"slave_max_allowed_packet", OPT_SLAVE_MAX_ALLOWED_PACKET, + "The maximum packet length to sent successfully from the master to slave.", + &slave_max_allowed_packet, &slave_max_allowed_packet, 0, GET_ULONG, + REQUIRED_ARG, MAX_MAX_ALLOWED_PACKET, 1024, MAX_MAX_ALLOWED_PACKET, MALLOC_OVERHEAD, 1024, 0}, {"max_binlog_cache_size", OPT_MAX_BINLOG_CACHE_SIZE, "Can be used to restrict the total size used to cache a multi-transaction query.", &max_binlog_cache_size, &max_binlog_cache_size, 0, diff --git a/sql/set_var.cc b/sql/set_var.cc index d9133a25d98..bbc47c2d7e8 100644 --- a/sql/set_var.cc +++ b/sql/set_var.cc @@ -366,6 +366,8 @@ static sys_var_const sys_lower_case_table_names(&vars, static sys_var_thd_ulong_session_readonly sys_max_allowed_packet(&vars, "max_allowed_packet", &SV::max_allowed_packet, check_max_allowed_packet); +static sys_var_long_ptr sys_slave_max_allowed_packet(&vars, "slave_max_allowed_packet", + &slave_max_allowed_packet); static sys_var_ulonglong_ptr sys_max_binlog_cache_size(&vars, "max_binlog_cache_size", &max_binlog_cache_size); static sys_var_long_ptr sys_max_binlog_size(&vars, "max_binlog_size", diff --git a/sql/share/errmsg.txt b/sql/share/errmsg.txt index 7cb9d9ebcc1..99bae298e49 100644 --- a/sql/share/errmsg.txt +++ b/sql/share/errmsg.txt @@ -3512,23 +3512,23 @@ ER_ABORTING_CONNECTION 08S01 swe "Avbröt länken för tråd %ld till db '%-.192s', användare '%-.48s' (%-.64s)" ukr "ðÅÒÅÒ×ÁÎÏ Ú'¤ÄÎÁÎÎÑ %ld ÄÏ ÂÁÚÉ ÄÁÎÎÉÈ: '%-.192s' ËÏÒÉÓÔÕ×ÁÞÁ: '%-.48s' (%-.64s)" ER_NET_PACKET_TOO_LARGE 08S01 - cze "Zji-B¹tìn pøíchozí packet del¹í ne¾ 'max_allowed_packet'" - dan "Modtog en datapakke som var større end 'max_allowed_packet'" - nla "Groter pakket ontvangen dan 'max_allowed_packet'" - eng "Got a packet bigger than 'max_allowed_packet' bytes" - est "Saabus suurem pakett kui lubatud 'max_allowed_packet' muutujaga" - fre "Paquet plus grand que 'max_allowed_packet' reçu" - ger "Empfangenes Paket ist größer als 'max_allowed_packet' Bytes" - hun "A kapott csomag nagyobb, mint a maximalisan engedelyezett: 'max_allowed_packet'" - ita "Ricevuto un pacchetto piu` grande di 'max_allowed_packet'" - kor "'max_allowed_packet'º¸´Ù ´õÅ« ÆÐŶÀ» ¹Þ¾Ò½À´Ï´Ù." - por "Obteve um pacote maior do que a taxa máxima de pacotes definida (max_allowed_packet)" - rum "Un packet mai mare decit 'max_allowed_packet' a fost primit" - rus "ðÏÌÕÞÅÎÎÙÊ ÐÁËÅÔ ÂÏÌØÛÅ, ÞÅÍ 'max_allowed_packet'" - serbian "Primio sam mrežni paket veæi od definisane vrednosti 'max_allowed_packet'" - spa "Obtenido un paquete mayor que 'max_allowed_packet'" - swe "Kommunkationspaketet är större än 'max_allowed_packet'" - ukr "ïÔÒÉÍÁÎÏ ÐÁËÅÔ Â¦ÌØÛÉÊ Î¦Ö max_allowed_packet" + cze "Zji-B¹tìn pøíchozí packet del¹í ne¾ 'slave_max_allowed_packet'" + dan "Modtog en datapakke som var større end 'slave_max_allowed_packet'" + nla "Groter pakket ontvangen dan 'slave_max_allowed_packet'" + eng "Got a packet bigger than 'slave_max_allowed_packet' bytes" + est "Saabus suurem pakett kui lubatud 'slave_max_allowed_packet' muutujaga" + fre "Paquet plus grand que 'slave_max_allowed_packet' reçu" + ger "Empfangenes Paket ist größer als 'slave_max_allowed_packet' Bytes" + hun "A kapott csomag nagyobb, mint a maximalisan engedelyezett: 'slave_max_allowed_packet'" + ita "Ricevuto un pacchetto piu` grande di 'slave_max_allowed_packet'" + kor "'slave_max_allowed_packet'º¸´Ù ´õÅ« ÆÐŶÀ» ¹Þ¾Ò½À´Ï´Ù." + por "Obteve um pacote maior do que a taxa máxima de pacotes definida (slave_max_allowed_packet)" + rum "Un packet mai mare decit 'slave_max_allowed_packet' a fost primit" + rus "ðÏÌÕÞÅÎÎÙÊ ÐÁËÅÔ ÂÏÌØÛÅ, ÞÅÍ 'slave_max_allowed_packet'" + serbian "Primio sam mrežni paket veæi od definisane vrednosti 'slave_max_allowed_packet'" + spa "Obtenido un paquete mayor que 'slave_max_allowed_packet'" + swe "Kommunkationspaketet är större än 'slave_max_allowed_packet'" + ukr "ïÔÒÉÍÁÎÏ ÐÁËÅÔ Â¦ÌØÛÉÊ Î¦Ö slave_max_allowed_packet" ER_NET_READ_ERROR_FROM_PIPE 08S01 cze "Zji-B¹tìna chyba pøi ètení z roury spojení" dan "Fik læsefejl fra forbindelse (connection pipe)" diff --git a/sql/slave.cc b/sql/slave.cc index 437762cc318..b555d4351c9 100644 --- a/sql/slave.cc +++ b/sql/slave.cc @@ -1884,8 +1884,8 @@ static int init_slave_thread(THD* thd, SLAVE_THD_TYPE thd_type) slave threads, since a replication event can become this much larger than the corresponding packet (query) sent from client to master. */ - thd->variables.max_allowed_packet= global_system_variables.max_allowed_packet - + MAX_LOG_EVENT_HEADER; /* note, incr over the global not session var */ + thd->variables.max_allowed_packet= slave_max_allowed_packet; + thd->net.max_packet_size= slave_max_allowed_packet; thd->slave_thread = 1; thd->enable_slow_log= opt_log_slow_slave_statements; set_slave_thread_options(thd); @@ -2630,6 +2630,7 @@ pthread_handler_t handle_slave_io(void *arg) thread, since a replication event can become this much larger than the corresponding packet (query) sent from client to master. */ + thd->net.max_packet_size= slave_max_allowed_packet; mysql->net.max_packet_size= thd->net.max_packet_size+= MAX_LOG_EVENT_HEADER; } else @@ -2761,10 +2762,10 @@ reading event")) switch (mysql_error_number) { case CR_NET_PACKET_TOO_LARGE: sql_print_error("\ -Log entry on master is longer than max_allowed_packet (%ld) on \ +Log entry on master is longer than slave_max_allowed_packet (%lu) on \ slave. If the entry is correct, restart the server with a higher value of \ -max_allowed_packet", - thd->variables.max_allowed_packet); +slave_max_allowed_packet", + slave_max_allowed_packet); mi->report(ERROR_LEVEL, ER_NET_PACKET_TOO_LARGE, "%s", ER(ER_NET_PACKET_TOO_LARGE)); goto err; diff --git a/sql/sql_repl.cc b/sql/sql_repl.cc index c92d2db2c1e..e3188def206 100644 --- a/sql/sql_repl.cc +++ b/sql/sql_repl.cc @@ -469,7 +469,7 @@ impossible position"; this larger than the corresponding packet (query) sent from client to master. */ - thd->variables.max_allowed_packet+= MAX_LOG_EVENT_HEADER; + thd->variables.max_allowed_packet= ULONG_MAX; /* We can set log_lock now, it does not move (it's a member of From a73d2ae02c594e74c6deb91a09a789a91e0dcc05 Mon Sep 17 00:00:00 2001 From: Tor Didriksen Date: Mon, 21 May 2012 10:47:12 +0200 Subject: [PATCH 021/164] Bug#13986705 CRASH IN GET_INTERVAL_VALUE() WITH DATE CALCULATION WITH UTF32 INTERVALS This is a followup to the fix for Bug#12340997 get_interval_value() was trying to parse the input string, looking for leading '-' while skipping whitespace. The macro my_isspace() does not work for utf32 character set, since my_charset_utf32_general_ci.ctype == NULL. Solution: convert input to ASCII before parsing, and use the character set of the returned ASCII string. --- sql/item_timefunc.cc | 162 +++++++++++++++++++++---------------------- 1 file changed, 78 insertions(+), 84 deletions(-) diff --git a/sql/item_timefunc.cc b/sql/item_timefunc.cc index 6fc85a01668..840c8e55efe 100644 --- a/sql/item_timefunc.cc +++ b/sql/item_timefunc.cc @@ -865,28 +865,43 @@ bool make_date_time(DATE_TIME_FORMAT *format, MYSQL_TIME *l_time, from the high end. This allows one to give: DAY_TO_SECOND as "D MM:HH:SS", "MM:HH:SS" "HH:SS" or as seconds. - @param length: length of str - @param cs: charset of str - @param values: array of results + @param args item expression which we convert to an ASCII string + @param str_value string buffer + @param is_negative set to true if interval is prefixed by '-' @param count: count of elements in result array + @param values: array of results @param transform_msec: if value is true we suppose that the last part of string value is microseconds and we should transform value to six digit value. For example, '1.1' -> '1.100000' */ -static bool get_interval_info(const char *str,uint length,CHARSET_INFO *cs, +static bool get_interval_info(Item *args, + String *str_value, + bool *is_negative, uint count, ulonglong *values, bool transform_msec) { - const char *end=str+length; - uint i; - long msec_length= 0; + String *res; + if (!(res= args->val_str_ascii(str_value))) + return true; - while (str != end && !my_isdigit(cs,*str)) + CHARSET_INFO *cs= res->charset(); + const char *str= res->ptr(); + const char *end= str + res->length(); + + str+= cs->cset->scan(cs, str, end, MY_SEQ_SPACES); + if (str < end && *str == '-') + { + *is_negative= true; + str++; + } + + while (str < end && !my_isdigit(cs,*str)) str++; - for (i=0 ; i < count ; i++) + long msec_length= 0; + for (uint i=0 ; i < count ; i++) { longlong value; const char *start= str; @@ -1427,45 +1442,24 @@ longlong Item_func_time_to_sec::val_int() To make code easy, allow interval objects without separators. */ -bool get_interval_value(Item *args,interval_type int_type, - String *str_value, INTERVAL *interval) +bool get_interval_value(Item *args, interval_type int_type, + String *str_value, INTERVAL *interval) { ulonglong array[5]; longlong UNINIT_VAR(value); - const char *UNINIT_VAR(str); - size_t UNINIT_VAR(length); - CHARSET_INFO *cs=str_value->charset(); bzero((char*) interval,sizeof(*interval)); if ((int) int_type <= INTERVAL_MICROSECOND) { value= args->val_int(); if (args->null_value) - return 1; + return true; if (value < 0) { - interval->neg=1; + interval->neg= true; value= -value; } } - else - { - String *res; - if (!(res= args->val_str_ascii(str_value))) - return (1); - - /* record negative intervalls in interval->neg */ - str=res->ptr(); - const char *end=str+res->length(); - while (str != end && my_isspace(cs,*str)) - str++; - if (str != end && *str == '-') - { - interval->neg=1; - str++; - } - length= (size_t) (end-str); // Set up pointers to new str - } switch (int_type) { case INTERVAL_YEAR: @@ -1486,88 +1480,88 @@ bool get_interval_value(Item *args,interval_type int_type, case INTERVAL_HOUR: interval->hour= (ulong) value; break; - case INTERVAL_MICROSECOND: - interval->second_part=value; - break; case INTERVAL_MINUTE: interval->minute=value; break; case INTERVAL_SECOND: interval->second=value; break; + case INTERVAL_MICROSECOND: + interval->second_part=value; + break; case INTERVAL_YEAR_MONTH: // Allow YEAR-MONTH YYYYYMM - if (get_interval_info(str,length,cs,2,array,0)) - return (1); + if (get_interval_info(args, str_value, &interval->neg, 2, array, false)) + return true; interval->year= (ulong) array[0]; interval->month= (ulong) array[1]; break; case INTERVAL_DAY_HOUR: - if (get_interval_info(str,length,cs,2,array,0)) - return (1); + if (get_interval_info(args, str_value, &interval->neg, 2, array, false)) + return true; interval->day= (ulong) array[0]; interval->hour= (ulong) array[1]; break; + case INTERVAL_DAY_MINUTE: + if (get_interval_info(args, str_value, &interval->neg, 3, array, false)) + return true; + interval->day= (ulong) array[0]; + interval->hour= (ulong) array[1]; + interval->minute= array[2]; + break; + case INTERVAL_DAY_SECOND: + if (get_interval_info(args, str_value, &interval->neg, 4, array, false)) + return true; + interval->day= (ulong) array[0]; + interval->hour= (ulong) array[1]; + interval->minute= array[2]; + interval->second= array[3]; + break; + case INTERVAL_HOUR_MINUTE: + if (get_interval_info(args, str_value, &interval->neg, 2, array, false)) + return true; + interval->hour= (ulong) array[0]; + interval->minute= array[1]; + break; + case INTERVAL_HOUR_SECOND: + if (get_interval_info(args, str_value, &interval->neg, 3, array, false)) + return true; + interval->hour= (ulong) array[0]; + interval->minute= array[1]; + interval->second= array[2]; + break; + case INTERVAL_MINUTE_SECOND: + if (get_interval_info(args, str_value, &interval->neg, 2, array, false)) + return true; + interval->minute= array[0]; + interval->second= array[1]; + break; case INTERVAL_DAY_MICROSECOND: - if (get_interval_info(str,length,cs,5,array,1)) - return (1); + if (get_interval_info(args, str_value, &interval->neg, 5, array, true)) + return true; interval->day= (ulong) array[0]; interval->hour= (ulong) array[1]; interval->minute= array[2]; interval->second= array[3]; interval->second_part= array[4]; break; - case INTERVAL_DAY_MINUTE: - if (get_interval_info(str,length,cs,3,array,0)) - return (1); - interval->day= (ulong) array[0]; - interval->hour= (ulong) array[1]; - interval->minute= array[2]; - break; - case INTERVAL_DAY_SECOND: - if (get_interval_info(str,length,cs,4,array,0)) - return (1); - interval->day= (ulong) array[0]; - interval->hour= (ulong) array[1]; - interval->minute= array[2]; - interval->second= array[3]; - break; case INTERVAL_HOUR_MICROSECOND: - if (get_interval_info(str,length,cs,4,array,1)) - return (1); + if (get_interval_info(args, str_value, &interval->neg, 4, array, true)) + return true; interval->hour= (ulong) array[0]; interval->minute= array[1]; interval->second= array[2]; interval->second_part= array[3]; break; - case INTERVAL_HOUR_MINUTE: - if (get_interval_info(str,length,cs,2,array,0)) - return (1); - interval->hour= (ulong) array[0]; - interval->minute= array[1]; - break; - case INTERVAL_HOUR_SECOND: - if (get_interval_info(str,length,cs,3,array,0)) - return (1); - interval->hour= (ulong) array[0]; - interval->minute= array[1]; - interval->second= array[2]; - break; case INTERVAL_MINUTE_MICROSECOND: - if (get_interval_info(str,length,cs,3,array,1)) - return (1); + if (get_interval_info(args, str_value, &interval->neg, 3, array, true)) + return true; interval->minute= array[0]; interval->second= array[1]; interval->second_part= array[2]; break; - case INTERVAL_MINUTE_SECOND: - if (get_interval_info(str,length,cs,2,array,0)) - return (1); - interval->minute= array[0]; - interval->second= array[1]; - break; case INTERVAL_SECOND_MICROSECOND: - if (get_interval_info(str,length,cs,2,array,1)) - return (1); + if (get_interval_info(args, str_value, &interval->neg, 2, array, true)) + return true; interval->second= array[0]; interval->second_part= array[1]; break; @@ -1575,7 +1569,7 @@ bool get_interval_value(Item *args,interval_type int_type, DBUG_ASSERT(0); break; /* purecov: end */ } - return 0; + return false; } From e979417c06f98f8ca81a7442d93f53d9aec79446 Mon Sep 17 00:00:00 2001 From: Annamalai Gurusami Date: Mon, 21 May 2012 17:25:40 +0530 Subject: [PATCH 022/164] Bug #12752572 61579: REPLICATION FAILURE WHILE INNODB_AUTOINC_LOCK_MODE=1 AND USING TRIGGER When an insert stmt like "insert into t values (1),(2),(3)" is executed, the autoincrement values assigned to these three rows are expected to be contiguous. In the given lock mode (innodb_autoinc_lock_mode=1), the auto inc lock will be released before the end of the statement. So to make the autoincrement contiguous for a given statement, we need to reserve the auto inc values at the beginning of the statement. Modified the fix based on review comment by Svoj. --- sql/handler.cc | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) diff --git a/sql/handler.cc b/sql/handler.cc index 20bf2355c25..9e43d5aba93 100644 --- a/sql/handler.cc +++ b/sql/handler.cc @@ -2398,18 +2398,18 @@ int handler::update_auto_increment() Note that in prelocked mode no estimation is given. */ - /* - For multi-row inserts, if the bulk inserts cannot be started, the - handler::estimation_rows_to_insert will not be set. Set it here. - */ - if ((estimation_rows_to_insert == 0) && - (thd->lex->many_values.elements > 0)) - { - estimation_rows_to_insert= thd->lex->many_values.elements; - } - if ((auto_inc_intervals_count == 0) && (estimation_rows_to_insert > 0)) nb_desired_values= estimation_rows_to_insert; + else if ((auto_inc_intervals_count == 0) && + (thd->lex->many_values.elements > 0)) + { + /* + For multi-row inserts, if the bulk inserts cannot be started, the + handler::estimation_rows_to_insert will not be set. But we still + want to reserve the autoinc values. + */ + nb_desired_values= thd->lex->many_values.elements; + } else /* go with the increasing defaults */ { /* avoid overflow in formula, with this if() */ From 8aedf7d30f4f2c19085407f6793bce84facdf1f5 Mon Sep 17 00:00:00 2001 From: Annamalai Gurusami Date: Wed, 23 May 2012 10:12:52 +0530 Subject: [PATCH 023/164] After the fix for Bug #12752572, there is a pb2 failure. Fixing it by updating the result file. Because a multi-row insert now reserves the auto increment values before hand, if any explicitly specified auto increment values are there, then some of the reserved values are lost. --- mysql-test/suite/rpl/r/rpl_trigger.result | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/mysql-test/suite/rpl/r/rpl_trigger.result b/mysql-test/suite/rpl/r/rpl_trigger.result index 784cd1bcdff..e6e6763d76e 100644 --- a/mysql-test/suite/rpl/r/rpl_trigger.result +++ b/mysql-test/suite/rpl/r/rpl_trigger.result @@ -29,7 +29,7 @@ a b 1 2 3 0 4 0 -5 0 +6 0 500 0 select a,name, old_a, old_b, truncate(rand_value,4) from t3; a name old_a old_b truncate(rand_value,4) @@ -39,7 +39,7 @@ a name old_a old_b truncate(rand_value,4) 103 t2 1 2 0.9164 104 t2 3 0 0.8826 105 t2 4 0 0.6635 -106 t2 5 0 0.6699 +106 t2 6 0 0.6699 107 t2 500 0 0.3593 --- On slave -- @@ -52,7 +52,7 @@ a b 1 2 3 0 4 0 -5 0 +6 0 500 0 select a,name, old_a, old_b, truncate(rand_value,4) from t3; a name old_a old_b truncate(rand_value,4) @@ -62,7 +62,7 @@ a name old_a old_b truncate(rand_value,4) 103 t2 1 2 0.9164 104 t2 3 0 0.8826 105 t2 4 0 0.6635 -106 t2 5 0 0.6699 +106 t2 6 0 0.6699 107 t2 500 0 0.3593 drop table t1,t2,t3; select get_lock("bug12480",2); From be7a6d93ccc3a8304246183a44637b43bf2461d7 Mon Sep 17 00:00:00 2001 From: Marc Alff Date: Wed, 23 May 2012 10:21:35 +0200 Subject: [PATCH 024/164] Improved the test performance_schema.func_file_io, so that investigating test failures is easier. Detect cases when @before_count / @after_count is NULL. --- mysql-test/suite/perfschema/r/func_file_io.result | 12 ++++++++++++ mysql-test/suite/perfschema/t/func_file_io.test | 4 ++++ 2 files changed, 16 insertions(+) diff --git a/mysql-test/suite/perfschema/r/func_file_io.result b/mysql-test/suite/perfschema/r/func_file_io.result index d99e77dcd8c..c95fae94803 100644 --- a/mysql-test/suite/perfschema/r/func_file_io.result +++ b/mysql-test/suite/perfschema/r/func_file_io.result @@ -15,6 +15,9 @@ SET @before_count = (SELECT SUM(TIMER_WAIT) FROM performance_schema.events_waits_history_long WHERE (EVENT_NAME = 'wait/io/file/myisam/dfile') AND (OBJECT_NAME LIKE '%t1.MYD')); +SELECT (@before_count >= 0) as have_before_count; +have_before_count +1 SELECT IF(@before_count > 0, 'Success', 'Failure') has_instrumentation; has_instrumentation Success @@ -27,6 +30,9 @@ SET @after_count = (SELECT SUM(TIMER_WAIT) FROM performance_schema.events_waits_history_long WHERE (EVENT_NAME = 'wait/io/file/myisam/dfile') AND (OBJECT_NAME LIKE '%t1.MYD') AND (1 = 1)); +SELECT (@after_count >= 0) as have_after_count; +have_after_count +1 SELECT IF((@after_count - @before_count) > 0, 'Success', 'Failure') test_ff1_timed; test_ff1_timed Success @@ -35,6 +41,9 @@ SET @before_count = (SELECT SUM(TIMER_WAIT) FROM performance_schema.events_waits_history_long WHERE (EVENT_NAME = 'wait/io/file/myisam/dfile') AND (OBJECT_NAME LIKE '%t1.MYD') AND (2 = 2)); +SELECT (@before_count >= 0) as have_before_count; +have_before_count +1 SELECT * FROM t1 WHERE id < 6; id b 1 initial value @@ -46,6 +55,9 @@ SET @after_count = (SELECT SUM(TIMER_WAIT) FROM performance_schema.events_waits_history_long WHERE (EVENT_NAME = 'wait/io/file/myisam/dfile') AND (OBJECT_NAME LIKE '%t1.MYD') AND (3 = 3)); +SELECT (@after_count >= 0) as have_after_count; +have_after_count +1 SELECT IF((COALESCE(@after_count, 0) - COALESCE(@before_count, 0)) = 0, 'Success', 'Failure') test_ff2_timed; test_ff2_timed Success diff --git a/mysql-test/suite/perfschema/t/func_file_io.test b/mysql-test/suite/perfschema/t/func_file_io.test index bcf29a7daa2..e8b01a10bd1 100644 --- a/mysql-test/suite/perfschema/t/func_file_io.test +++ b/mysql-test/suite/perfschema/t/func_file_io.test @@ -41,6 +41,7 @@ SET @before_count = (SELECT SUM(TIMER_WAIT) WHERE (EVENT_NAME = 'wait/io/file/myisam/dfile') AND (OBJECT_NAME LIKE '%t1.MYD')); +SELECT (@before_count >= 0) as have_before_count; SELECT IF(@before_count > 0, 'Success', 'Failure') has_instrumentation; SELECT * FROM t1 WHERE id < 4; @@ -50,6 +51,7 @@ SET @after_count = (SELECT SUM(TIMER_WAIT) WHERE (EVENT_NAME = 'wait/io/file/myisam/dfile') AND (OBJECT_NAME LIKE '%t1.MYD') AND (1 = 1)); +SELECT (@after_count >= 0) as have_after_count; SELECT IF((@after_count - @before_count) > 0, 'Success', 'Failure') test_ff1_timed; UPDATE performance_schema.setup_instruments SET enabled='NO'; @@ -59,6 +61,7 @@ SET @before_count = (SELECT SUM(TIMER_WAIT) WHERE (EVENT_NAME = 'wait/io/file/myisam/dfile') AND (OBJECT_NAME LIKE '%t1.MYD') AND (2 = 2)); +SELECT (@before_count >= 0) as have_before_count; SELECT * FROM t1 WHERE id < 6; SET @after_count = (SELECT SUM(TIMER_WAIT) @@ -66,6 +69,7 @@ SET @after_count = (SELECT SUM(TIMER_WAIT) WHERE (EVENT_NAME = 'wait/io/file/myisam/dfile') AND (OBJECT_NAME LIKE '%t1.MYD') AND (3 = 3)); +SELECT (@after_count >= 0) as have_after_count; SELECT IF((COALESCE(@after_count, 0) - COALESCE(@before_count, 0)) = 0, 'Success', 'Failure') test_ff2_timed; # From 889ce031087dbe44cdbdbd2c93a7983667aec536 Mon Sep 17 00:00:00 2001 From: "Norvald H. Ryeng" Date: Wed, 23 May 2012 12:27:32 +0200 Subject: [PATCH 025/164] WL#6311 Remove --safe-mode Print deprecation warning if the --safe-mode command line option is used. --- mysql-test/r/mysqld--help-notwin.result | 2 +- mysql-test/r/mysqld--help-win.result | 2 +- sql/mysqld.cc | 4 +++- 3 files changed, 5 insertions(+), 3 deletions(-) diff --git a/mysql-test/r/mysqld--help-notwin.result b/mysql-test/r/mysqld--help-notwin.result index 36649cf761d..72f89ae3bc1 100644 --- a/mysql-test/r/mysqld--help-notwin.result +++ b/mysql-test/r/mysqld--help-notwin.result @@ -595,7 +595,7 @@ The following options may be given as the first argument: master during slave registration --rpl-recovery-rank=# Unused, will be removed - --safe-mode Skip some optimize stages (for testing). + --safe-mode Skip some optimize stages (for testing). Deprecated. --safe-user-create Don't allow new user creation by the user who has no write privileges to the mysql.user table. --secure-auth Disallow authentication for accounts that have old diff --git a/mysql-test/r/mysqld--help-win.result b/mysql-test/r/mysqld--help-win.result index db7dd264b76..2ab41913427 100644 --- a/mysql-test/r/mysqld--help-win.result +++ b/mysql-test/r/mysqld--help-win.result @@ -595,7 +595,7 @@ The following options may be given as the first argument: master during slave registration --rpl-recovery-rank=# Unused, will be removed - --safe-mode Skip some optimize stages (for testing). + --safe-mode Skip some optimize stages (for testing). Deprecated. --safe-user-create Don't allow new user creation by the user who has no write privileges to the mysql.user table. --secure-auth Disallow authentication for accounts that have old diff --git a/sql/mysqld.cc b/sql/mysqld.cc index a37a9701fe7..df9fbaa8652 100644 --- a/sql/mysqld.cc +++ b/sql/mysqld.cc @@ -5948,7 +5948,7 @@ struct my_option my_long_options[]= "will not do updates to tables in databases that start with foo and whose " "table names start with bar.", 0, 0, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0}, - {"safe-mode", OPT_SAFE, "Skip some optimize stages (for testing).", + {"safe-mode", OPT_SAFE, "Skip some optimize stages (for testing). Deprecated.", 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0}, {"safe-user-create", 0, "Don't allow new user creation by the user who has no write privileges to the mysql.user table.", @@ -7081,6 +7081,8 @@ mysqld_get_one_option(int optid, delay_key_write_options= DELAY_KEY_WRITE_NONE; myisam_recover_options= HA_RECOVER_DEFAULT; ha_open_options&= ~(HA_OPEN_DELAY_KEY_WRITE); + sql_print_warning("The syntax '--safe-mode' is deprecated and will be " + "removed in a future release."); break; case (int) OPT_SKIP_PRIOR: opt_specialflag|= SPECIAL_NO_PRIOR; From dcd4fa3fd5330945cb996081e521b2d9d635edab Mon Sep 17 00:00:00 2001 From: Sujatha Sivakumar Date: Thu, 24 May 2012 16:25:07 +0530 Subject: [PATCH 026/164] Bug#13833962:DISABLE [NOTE] START BINLOG_DUMP TO SLAVE_SERVER(0) MESSAGES IN THE ERROR LOG Problem: Using mysqlbinlog with the --read-from-remote-server option as shown below prints a message in error log for each call. This happens for 5.5 and above versions mysqlbinlog -uroot -p --read-from-remote-server --host=localhost test Message in error log file is given below: 120312 10:27:57 [Note] Start binlog_dump to slave_server(0), pos(test, 4) The problem is that it can fill up the error log if the command is called very often. Analysis: The below mentioned print function is called from "mysql_binlog_send" function which causes the "Start binlog_dump..." string to be printed in error log file. sql_print_information("Start binlog_dump to master_thread_id(%lu) slave_server(%d)..." Fix: A condition has been added in such a way that the 'sql_print_information' will be invoked only when the "log_warnings" variable is set to >1 otherwise don't call the 'sql_print_information' function. --- sql/sql_repl.cc | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/sql/sql_repl.cc b/sql/sql_repl.cc index ffc7aa4bf8a..5968c17f871 100644 --- a/sql/sql_repl.cc +++ b/sql/sql_repl.cc @@ -476,7 +476,8 @@ void mysql_binlog_send(THD* thd, char* log_ident, my_off_t pos, heartbeat_ts= &heartbeat_buf; set_timespec_nsec(*heartbeat_ts, 0); } - sql_print_information("Start binlog_dump to slave_server(%d), pos(%s, %lu)", + if (global_system_variables.log_warnings > 1) + sql_print_information("Start binlog_dump to slave_server(%d), pos(%s, %lu)", thd->server_id, log_ident, (ulong)pos); if (RUN_HOOK(binlog_transmit, transmit_start, (thd, flags, log_ident, pos))) { From 01748ce128ae4c29cfb63e88cd68918e7d48e946 Mon Sep 17 00:00:00 2001 From: Inaam Rana Date: Thu, 24 May 2012 12:37:03 -0400 Subject: [PATCH 027/164] Bug #14100254 65389: MVCC IS BROKEN WITH IMPLICIT LOCK rb://1088 approved by: Marko Makela This bug was introduced in early stages of plugin. We were not checking for an implicit lock on sec index rec for trx_id that is stamped on current version of the clust_index in case where the clust_index has a previous delete marked version. --- storage/innodb_plugin/row/row0vers.c | 12 ------------ 1 file changed, 12 deletions(-) diff --git a/storage/innodb_plugin/row/row0vers.c b/storage/innodb_plugin/row/row0vers.c index 8a7bb842293..9aeaa2db6c0 100644 --- a/storage/innodb_plugin/row/row0vers.c +++ b/storage/innodb_plugin/row/row0vers.c @@ -208,18 +208,6 @@ row_vers_impl_x_locked_off_kernel( vers_del = rec_get_deleted_flag(prev_version, comp); prev_trx_id = row_get_rec_trx_id(prev_version, clust_index, clust_offsets); - - /* If the trx_id and prev_trx_id are different and if - the prev_version is marked deleted then the - prev_trx_id must have already committed for the trx_id - to be able to modify the row. Therefore, prev_trx_id - cannot hold any implicit lock. */ - if (vers_del && 0 != ut_dulint_cmp(trx_id, prev_trx_id)) { - - mutex_enter(&kernel_mutex); - break; - } - /* The stack of versions is locked by mtr. Thus, it is safe to fetch the prefixes for externally stored columns. */ From efe42792b363e97dd5ccb74be1abac2d4e79ca9e Mon Sep 17 00:00:00 2001 From: Mayank Prasad Date: Thu, 24 May 2012 23:00:32 +0530 Subject: [PATCH 028/164] Bug#13417440 : 63340: ARCHIVE FILE IO NOT INSTRUMENTED Details: - Archive storage engine file access were not instrumented and thus were not shown in PS tables. Fix: - Added instrumentation code by using PS Apis for I/O. --- .../suite/perfschema/r/query_cache.result | 4 +-- mysql-test/suite/perfschema/t/disabled.def | 2 +- storage/archive/azio.c | 25 +++++++++++-------- storage/archive/ha_archive.cc | 25 ++++++++++++++----- 4 files changed, 37 insertions(+), 19 deletions(-) diff --git a/mysql-test/suite/perfschema/r/query_cache.result b/mysql-test/suite/perfschema/r/query_cache.result index c7ac3d499b4..56511999ab2 100644 --- a/mysql-test/suite/perfschema/r/query_cache.result +++ b/mysql-test/suite/perfschema/r/query_cache.result @@ -38,7 +38,7 @@ spins NULL select name from performance_schema.setup_instruments order by name limit 1; name -wait/io/file/csv/data +wait/io/file/archive/data show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 1 @@ -53,7 +53,7 @@ spins NULL select name from performance_schema.setup_instruments order by name limit 1; name -wait/io/file/csv/data +wait/io/file/archive/data show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 1 diff --git a/mysql-test/suite/perfschema/t/disabled.def b/mysql-test/suite/perfschema/t/disabled.def index 8cae44a3607..6c496ec6d95 100644 --- a/mysql-test/suite/perfschema/t/disabled.def +++ b/mysql-test/suite/perfschema/t/disabled.def @@ -9,4 +9,4 @@ # Do not use any TAB characters for whitespace. # ############################################################################## - +misc.test : bug#14113704 24/04/2012 Mayank issure reported causing failure. diff --git a/storage/archive/azio.c b/storage/archive/azio.c index 5fc9bc875f8..ec4b5bcb7cd 100644 --- a/storage/archive/azio.c +++ b/storage/archive/azio.c @@ -37,6 +37,8 @@ void putLong(File file, uLong x); uLong getLong(azio_stream *s); void read_header(azio_stream *s, unsigned char *buffer); +extern PSI_file_key arch_key_file_data; + /* =========================================================================== Opens a gzip (.gz) file for reading or writing. The mode parameter is as in fopen ("rb" or "wb"). The file is given either by file descriptor @@ -113,7 +115,7 @@ int az_open (azio_stream *s, const char *path, int Flags, File fd) s->stream.avail_out = AZ_BUFSIZE_WRITE; errno = 0; - s->file = fd < 0 ? my_open(path, Flags, MYF(0)) : fd; + s->file = fd < 0 ? mysql_file_open(arch_key_file_data, path, Flags, MYF(0)) : fd; DBUG_EXECUTE_IF("simulate_archive_open_failure", { if (s->file >= 0) @@ -235,8 +237,8 @@ int get_byte(s) if (s->stream.avail_in == 0) { errno = 0; - s->stream.avail_in= (uInt) my_read(s->file, (uchar *)s->inbuf, - AZ_BUFSIZE_READ, MYF(0)); + s->stream.avail_in= (uInt) mysql_file_read(s->file, (uchar *)s->inbuf, + AZ_BUFSIZE_READ, MYF(0)); if (s->stream.avail_in == 0) { s->z_eof = 1; @@ -277,7 +279,8 @@ void check_header(azio_stream *s) if (len < 2) { if (len) s->inbuf[0] = s->stream.next_in[0]; errno = 0; - len = (uInt)my_read(s->file, (uchar *)s->inbuf + len, AZ_BUFSIZE_READ >> len, MYF(0)); + len = (uInt)mysql_file_read(s->file, (uchar *)s->inbuf + len, + AZ_BUFSIZE_READ >> len, MYF(0)); if (len == (uInt)-1) s->z_err = Z_ERRNO; s->stream.avail_in += len; s->stream.next_in = s->inbuf; @@ -468,7 +471,8 @@ unsigned int ZEXPORT azread ( azio_stream *s, voidp buf, size_t len, int *error) if (s->stream.avail_out > 0) { s->stream.avail_out -= - (uInt)my_read(s->file, (uchar *)next_out, s->stream.avail_out, MYF(0)); + (uInt)mysql_file_read(s->file, (uchar *)next_out, + s->stream.avail_out, MYF(0)); } len -= s->stream.avail_out; s->in += len; @@ -481,7 +485,8 @@ unsigned int ZEXPORT azread ( azio_stream *s, voidp buf, size_t len, int *error) if (s->stream.avail_in == 0 && !s->z_eof) { errno = 0; - s->stream.avail_in = (uInt)my_read(s->file, (uchar *)s->inbuf, AZ_BUFSIZE_READ, MYF(0)); + s->stream.avail_in = (uInt)mysql_file_read(s->file, (uchar *)s->inbuf, + AZ_BUFSIZE_READ, MYF(0)); if (s->stream.avail_in == 0) { s->z_eof = 1; @@ -548,8 +553,8 @@ unsigned int azwrite (azio_stream *s, const voidp buf, unsigned int len) { s->stream.next_out = s->outbuf; - if (my_write(s->file, (uchar *)s->outbuf, AZ_BUFSIZE_WRITE, - MYF(0)) != AZ_BUFSIZE_WRITE) + if (mysql_file_write(s->file, (uchar *)s->outbuf, AZ_BUFSIZE_WRITE, + MYF(0)) != AZ_BUFSIZE_WRITE) { s->z_err = Z_ERRNO; break; @@ -596,7 +601,7 @@ int do_flush (azio_stream *s, int flush) if (len != 0) { s->check_point= my_tell(s->file, MYF(0)); - if ((uInt)my_write(s->file, (uchar *)s->outbuf, len, MYF(0)) != len) + if ((uInt)mysql_file_write(s->file, (uchar *)s->outbuf, len, MYF(0)) != len) { s->z_err = Z_ERRNO; return Z_ERRNO; @@ -783,7 +788,7 @@ void putLong (File file, uLong x) for (n = 0; n < 4; n++) { buffer[0]= (int)(x & 0xff); - my_write(file, buffer, 1, MYF(0)); + mysql_file_write(file, buffer, 1, MYF(0)); x >>= 8; } } diff --git a/storage/archive/ha_archive.cc b/storage/archive/ha_archive.cc index d040d694e1f..dba647b8d1a 100644 --- a/storage/archive/ha_archive.cc +++ b/storage/archive/ha_archive.cc @@ -114,6 +114,8 @@ static HASH archive_open_tables; #define DATA_BUFFER_SIZE 2 // Size of the data used in the data file #define ARCHIVE_CHECK_HEADER 254 // The number we use to determine corruption +extern "C" PSI_file_key arch_key_file_data; + /* Static declarations for handerton */ static handler *archive_create_handler(handlerton *hton, TABLE_SHARE *table, @@ -159,6 +161,14 @@ static PSI_mutex_info all_archive_mutexes[]= { &az_key_mutex_ARCHIVE_SHARE_mutex, "ARCHIVE_SHARE::mutex", 0} }; +PSI_file_key arch_key_file_metadata, arch_key_file_data, arch_key_file_frm; +static PSI_file_info all_archive_files[]= +{ + { &arch_key_file_metadata, "metadata", 0}, + { &arch_key_file_data, "data", 0}, + { &arch_key_file_frm, "FRM", 0} +}; + static void init_archive_psi_keys(void) { const char* category= "archive"; @@ -169,6 +179,9 @@ static void init_archive_psi_keys(void) count= array_elements(all_archive_mutexes); PSI_server->register_mutex(category, all_archive_mutexes, count); + + count= array_elements(all_archive_files); + PSI_server->register_file(category, all_archive_files, count); } #endif /* HAVE_PSI_INTERFACE */ @@ -262,7 +275,7 @@ int archive_discover(handlerton *hton, THD* thd, const char *db, build_table_filename(az_file, sizeof(az_file) - 1, db, name, ARZ, 0); - if (!(my_stat(az_file, &file_stat, MYF(0)))) + if (!(mysql_file_stat(arch_key_file_data, az_file, &file_stat, MYF(0)))) goto err; if (!(azopen(&frm_stream, az_file, O_RDONLY|O_BINARY))) @@ -712,7 +725,7 @@ int ha_archive::create(const char *name, TABLE *table_arg, There is a chance that the file was "discovered". In this case just use whatever file is there. */ - if (!(my_stat(name_buff, &file_stat, MYF(0)))) + if (!(mysql_file_stat(arch_key_file_data, name_buff, &file_stat, MYF(0)))) { my_errno= 0; if (!(azopen(&create_stream, name_buff, O_CREAT|O_RDWR|O_BINARY))) @@ -729,19 +742,19 @@ int ha_archive::create(const char *name, TABLE *table_arg, /* Here is where we open up the frm and pass it to archive to store */ - if ((frm_file= my_open(name_buff, O_RDONLY, MYF(0))) > 0) + if ((frm_file= mysql_file_open(arch_key_file_frm, name_buff, O_RDONLY, MYF(0))) >= 0) { if (!mysql_file_fstat(frm_file, &file_stat, MYF(MY_WME))) { frm_ptr= (uchar *)my_malloc(sizeof(uchar) * file_stat.st_size, MYF(0)); if (frm_ptr) { - my_read(frm_file, frm_ptr, file_stat.st_size, MYF(0)); + mysql_file_read(frm_file, frm_ptr, file_stat.st_size, MYF(0)); azwrite_frm(&create_stream, (char *)frm_ptr, file_stat.st_size); my_free(frm_ptr); } } - my_close(frm_file, MYF(0)); + mysql_file_close(frm_file, MYF(0)); } if (create_info->comment.str) @@ -1607,7 +1620,7 @@ int ha_archive::info(uint flag) { MY_STAT file_stat; // Stat information for the data file - (void) my_stat(share->data_file_name, &file_stat, MYF(MY_WME)); + (void) mysql_file_stat(arch_key_file_data, share->data_file_name, &file_stat, MYF(MY_WME)); if (flag & HA_STATUS_TIME) stats.update_time= (ulong) file_stat.st_mtime; From 1c1d19af8cc54127ff861d7fb0d92b6322b81f16 Mon Sep 17 00:00:00 2001 From: unknown Date: Fri, 25 May 2012 13:19:44 +0530 Subject: [PATCH 029/164] From b2888adb701c1cfd1db137937d50f571fe8366d4 Mon Sep 17 00:00:00 2001 From: Mayank Prasad Date: Fri, 25 May 2012 15:44:27 +0530 Subject: [PATCH 030/164] PB2 Failure Fix : Disabled the test case in correct manner. --- mysql-test/suite/perfschema/t/disabled.def | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mysql-test/suite/perfschema/t/disabled.def b/mysql-test/suite/perfschema/t/disabled.def index 6c496ec6d95..8a843692d2a 100644 --- a/mysql-test/suite/perfschema/t/disabled.def +++ b/mysql-test/suite/perfschema/t/disabled.def @@ -9,4 +9,4 @@ # Do not use any TAB characters for whitespace. # ############################################################################## -misc.test : bug#14113704 24/04/2012 Mayank issure reported causing failure. +misc : bug#14113704 24/04/2012 Mayank issue reported causing failure. From b2c3acc987193775d392e763c8b9eef3da7c65a8 Mon Sep 17 00:00:00 2001 From: Praveenkumar Hulakund Date: Mon, 28 May 2012 11:14:43 +0530 Subject: [PATCH 031/164] Bug#14003080:65104: MAX_USER_CONNECTIONS WITH PROCESSLIST EMPTY Analysis: ------------- If server is started with limit of MAX_CONNECTIONS and MAX_USER_CONNECTIONS then only MAX_USER_CONNECTIONS of any particular users can be connected to server and total MAX_CONNECTIONS of client can be connected to server. Server maintains a counter for total CONNECTIONS and total CONNECTIONS from particular user. Here, MAX_CONNECTIONS of connections are created to server. Out of this MAX_CONNECTIONS, connections from particular user (say USER1) are also created. The connections from USER1 is lesser than MAX_USER_CONNECTIONS. After that there was one more connection request from USER1. Since USER1 can still create connections as he havent reached MAX_USER_CONNECTIONS, server increments counter of CONNECTIONS per user. As server already has MAX_CONNECTIONS of connections, next check to total CONNECTION count fails. In this case control is returned WITHOUT decrementing the CONNECTIONS per user. So the counter per user CONNECTIONS goes on incrementing for each attempt until current connections are closed. And because of this counter per CONNECTIONS reached MAX_USER_CONNECTIONS. So, next connections form USER1 user always returns with MAX_USER_CONNECTION limit error, even when total connection to sever are less than MAX_CONNECTIONS. Fix: ------------- This issue is occurred because of not handling counters properly in the server. Changed the code to handle per user connection counters properly. --- sql/sql_acl.cc | 19 +++---- sql/sql_class.cc | 86 ++++++++++++++++++++++++++++- sql/sql_class.h | 21 +++++++- sql/sql_connect.cc | 132 +++++++++++++++++++++++++++------------------ sql/sql_connect.h | 3 +- sql/sql_parse.cc | 7 +-- sql/sys_vars.h | 5 +- 7 files changed, 200 insertions(+), 73 deletions(-) diff --git a/sql/sql_acl.cc b/sql/sql_acl.cc index 3438e60683f..d3715fd2312 100644 --- a/sql/sql_acl.cc +++ b/sql/sql_acl.cc @@ -7810,8 +7810,6 @@ get_cached_table_access(GRANT_INTERNAL_INFO *grant_internal_info, #undef HAVE_OPENSSL #ifdef NO_EMBEDDED_ACCESS_CHECKS #define initialized 0 -#define decrease_user_connections(X) /* nothing */ -#define check_for_max_user_connections(X, Y) 0 #endif #endif #ifndef HAVE_OPENSSL @@ -9297,7 +9295,7 @@ acl_authenticate(THD *thd, uint connect_errors, uint com_change_user_pkt_len) mpvio.packets_read++; // take COM_CHANGE_USER packet into account /* Clear variables that are allocated */ - thd->user_connect= 0; + thd->set_user_connect(NULL); if (parse_com_change_user_packet(&mpvio, com_change_user_pkt_len)) { @@ -9460,11 +9458,11 @@ acl_authenticate(THD *thd, uint connect_errors, uint com_change_user_pkt_len) else sctx->skip_grants(); - if (thd->user_connect && - (thd->user_connect->user_resources.conn_per_hour || - thd->user_connect->user_resources.user_conn || + const USER_CONN *uc; + if ((uc= thd->get_user_connect()) && + (uc->user_resources.conn_per_hour || uc->user_resources.user_conn || global_system_variables.max_user_connections) && - check_for_max_user_connections(thd, thd->user_connect)) + check_for_max_user_connections(thd, uc)) { DBUG_RETURN(1); // The error is set in check_for_max_user_connections() } @@ -9486,6 +9484,7 @@ acl_authenticate(THD *thd, uint connect_errors, uint com_change_user_pkt_len) mysql_mutex_unlock(&LOCK_connection_count); if (!count_ok) { // too many connections + release_user_connection(thd); my_error(ER_CON_COUNT_ERROR, MYF(0)); DBUG_RETURN(1); } @@ -9504,11 +9503,7 @@ acl_authenticate(THD *thd, uint connect_errors, uint com_change_user_pkt_len) if (mysql_change_db(thd, &mpvio.db, FALSE)) { /* mysql_change_db() has pushed the error message. */ - if (thd->user_connect) - { - decrease_user_connections(thd->user_connect); - thd->user_connect= 0; - } + release_user_connection(thd); DBUG_RETURN(1); } } diff --git a/sql/sql_class.cc b/sql/sql_class.cc index bdcb85218c3..7e93157c69e 100644 --- a/sql/sql_class.cc +++ b/sql/sql_class.cc @@ -852,7 +852,7 @@ THD::THD() #if defined(ENABLED_PROFILING) profiling.set_thd(this); #endif - user_connect=(USER_CONN *)0; + m_user_connect= NULL; my_hash_init(&user_vars, system_charset_info, USER_VARS_HASH_SIZE, 0, 0, (my_hash_get_key) get_var_key, (my_hash_free_key) free_user_var, 0); @@ -5009,3 +5009,87 @@ bool Discrete_intervals_list::append(Discrete_interval *new_interval) } #endif /* !defined(MYSQL_CLIENT) */ + +void THD::set_user_connect(USER_CONN *uc) +{ + DBUG_ENTER("THD::set_user_connect"); + + m_user_connect= uc; + + DBUG_VOID_RETURN; +} + +void THD::increment_user_connections_counter() +{ + DBUG_ENTER("THD::increment_user_connections_counter"); + + m_user_connect->connections++; + + DBUG_VOID_RETURN; +} + +void THD::decrement_user_connections_counter() +{ + DBUG_ENTER("THD::decrement_user_connections_counter"); + + DBUG_ASSERT(m_user_connect->connections > 0); + m_user_connect->connections--; + + DBUG_VOID_RETURN; +} + +void THD::increment_con_per_hour_counter() +{ + DBUG_ENTER("THD::decrement_conn_per_hour_counter"); + + m_user_connect->conn_per_hour++; + + DBUG_VOID_RETURN; +} + +void THD::increment_updates_counter() +{ + DBUG_ENTER("THD::increment_updates_counter"); + + m_user_connect->updates++; + + DBUG_VOID_RETURN; +} + +void THD::increment_questions_counter() +{ + DBUG_ENTER("THD::increment_updates_counter"); + + m_user_connect->questions++; + + DBUG_VOID_RETURN; +} + +/* + Reset per-hour user resource limits when it has been more than + an hour since they were last checked + + SYNOPSIS: + time_out_user_resource_limits() + + NOTE: + This assumes that the LOCK_user_conn mutex has been acquired, so it is + safe to test and modify members of the USER_CONN structure. +*/ +void THD::time_out_user_resource_limits() +{ + mysql_mutex_assert_owner(&LOCK_user_conn); + ulonglong check_time= start_utime; + DBUG_ENTER("time_out_user_resource_limits"); + + /* If more than a hour since last check, reset resource checking */ + if (check_time - m_user_connect->reset_utime >= LL(3600000000)) + { + m_user_connect->questions=1; + m_user_connect->updates=0; + m_user_connect->conn_per_hour=0; + m_user_connect->reset_utime= check_time; + } + + DBUG_VOID_RETURN; +} diff --git a/sql/sql_class.h b/sql/sql_class.h index bffa490ebe3..d799980f8e1 100644 --- a/sql/sql_class.h +++ b/sql/sql_class.h @@ -1960,7 +1960,26 @@ public: */ ha_rows examined_row_count; - USER_CONN *user_connect; +private: + USER_CONN *m_user_connect; + +public: + void set_user_connect(USER_CONN *uc); + const USER_CONN* get_user_connect() + { return m_user_connect; } + + void increment_user_connections_counter(); + void decrement_user_connections_counter(); + + void increment_con_per_hour_counter(); + + void increment_updates_counter(); + + void increment_questions_counter(); + + void time_out_user_resource_limits(); + +public: CHARSET_INFO *db_charset; Warning_info *warning_info; Diagnostics_area *stmt_da; diff --git a/sql/sql_connect.cc b/sql/sql_connect.cc index 366dec733c4..cdb0f5de049 100644 --- a/sql/sql_connect.cc +++ b/sql/sql_connect.cc @@ -105,8 +105,8 @@ int get_or_create_user_conn(THD *thd, const char *user, goto end; } } - thd->user_connect=uc; - uc->connections++; + thd->set_user_connect(uc); + thd->increment_user_connections_counter(); end: mysql_mutex_unlock(&LOCK_user_conn); return return_val; @@ -131,7 +131,7 @@ end: 1 error */ -int check_for_max_user_connections(THD *thd, USER_CONN *uc) +int check_for_max_user_connections(THD *thd, const USER_CONN *uc) { int error=0; DBUG_ENTER("check_for_max_user_connections"); @@ -145,7 +145,7 @@ int check_for_max_user_connections(THD *thd, USER_CONN *uc) error=1; goto end; } - time_out_user_resource_limits(thd, uc); + thd->time_out_user_resource_limits(); if (uc->user_resources.user_conn && uc->user_resources.user_conn < uc->connections) { @@ -164,18 +164,18 @@ int check_for_max_user_connections(THD *thd, USER_CONN *uc) error=1; goto end; } - uc->conn_per_hour++; + thd->increment_con_per_hour_counter(); end: if (error) { - uc->connections--; // no need for decrease_user_connections() here + thd->decrement_user_connections_counter(); /* The thread may returned back to the pool and assigned to a user that doesn't have a limit. Ensure the user is not using resources of someone else. */ - thd->user_connect= NULL; + thd->set_user_connect(NULL); } mysql_mutex_unlock(&LOCK_user_conn); DBUG_RETURN(error); @@ -214,38 +214,37 @@ void decrease_user_connections(USER_CONN *uc) DBUG_VOID_RETURN; } - /* - Reset per-hour user resource limits when it has been more than - an hour since they were last checked + Decrements user connections count from the USER_CONN held by THD + And removes USER_CONN from the hash if no body else is using it. - SYNOPSIS: - time_out_user_resource_limits() - thd Thread handler - uc User connection details - - NOTE: - This assumes that the LOCK_user_conn mutex has been acquired, so it is - safe to test and modify members of the USER_CONN structure. -*/ - -void time_out_user_resource_limits(THD *thd, USER_CONN *uc) + SYNOPSIS + release_user_connection() + THD Thread context object. + */ +void release_user_connection(THD *thd) { - ulonglong check_time= thd->start_utime; - DBUG_ENTER("time_out_user_resource_limits"); + const USER_CONN *uc= thd->get_user_connect(); + DBUG_ENTER("release_user_connection"); - /* If more than a hour since last check, reset resource checking */ - if (check_time - uc->reset_utime >= LL(3600000000)) + if (uc) { - uc->questions=1; - uc->updates=0; - uc->conn_per_hour=0; - uc->reset_utime= check_time; + mysql_mutex_lock(&LOCK_user_conn); + DBUG_ASSERT(uc->connections > 0); + thd->decrement_user_connections_counter(); + if (!uc->connections && !mqh_used) + { + /* Last connection for user; Delete it */ + (void) my_hash_delete(&hash_user_connections,(uchar*) uc); + } + mysql_mutex_unlock(&LOCK_user_conn); + thd->set_user_connect(NULL); } DBUG_VOID_RETURN; } + /* Check if maximum queries per hour limit has been reached returns 0 if OK. @@ -254,40 +253,70 @@ void time_out_user_resource_limits(THD *thd, USER_CONN *uc) bool check_mqh(THD *thd, uint check_command) { bool error= 0; - USER_CONN *uc=thd->user_connect; + const USER_CONN *uc=thd->get_user_connect(); DBUG_ENTER("check_mqh"); DBUG_ASSERT(uc != 0); mysql_mutex_lock(&LOCK_user_conn); - time_out_user_resource_limits(thd, uc); + thd->time_out_user_resource_limits(); /* Check that we have not done too many questions / hour */ - if (uc->user_resources.questions && - uc->questions++ >= uc->user_resources.questions) + if (uc->user_resources.questions) { - my_error(ER_USER_LIMIT_REACHED, MYF(0), uc->user, "max_questions", - (long) uc->user_resources.questions); - error=1; - goto end; + thd->increment_questions_counter(); + if ((uc->questions - 1) >= uc->user_resources.questions) + { + my_error(ER_USER_LIMIT_REACHED, MYF(0), uc->user, "max_questions", + (long) uc->user_resources.questions); + error=1; + goto end; + } } if (check_command < (uint) SQLCOM_END) { /* Check that we have not done too many updates / hour */ if (uc->user_resources.updates && - (sql_command_flags[check_command] & CF_CHANGES_DATA) && - uc->updates++ >= uc->user_resources.updates) + (sql_command_flags[check_command] & CF_CHANGES_DATA)) { - my_error(ER_USER_LIMIT_REACHED, MYF(0), uc->user, "max_updates", - (long) uc->user_resources.updates); - error=1; - goto end; + thd->increment_updates_counter(); + if ((uc->updates - 1) >= uc->user_resources.updates) + { + my_error(ER_USER_LIMIT_REACHED, MYF(0), uc->user, "max_updates", + (long) uc->user_resources.updates); + error=1; + goto end; + } } } end: mysql_mutex_unlock(&LOCK_user_conn); DBUG_RETURN(error); } +#else + +int check_for_max_user_connections(THD *thd, const USER_CONN *uc) +{ + return 0; +} + +void decrease_user_connections(USER_CONN *uc) +{ + return; +} + +void release_user_connection(THD *thd) +{ + const USER_CONN *uc= thd->get_user_connect(); + DBUG_ENTER("release_user_connection"); + + if (uc) + { + thd->set_user_connect(NULL); + } + + DBUG_VOID_RETURN; +} #endif /* NO_EMBEDDED_ACCESS_CHECKS */ @@ -609,16 +638,13 @@ void end_connection(THD *thd) { NET *net= &thd->net; plugin_thdvar_cleanup(thd); - if (thd->user_connect) - { - decrease_user_connections(thd->user_connect); - /* - The thread may returned back to the pool and assigned to a user - that doesn't have a limit. Ensure the user is not using resources - of someone else. - */ - thd->user_connect= NULL; - } + + /* + The thread may returned back to the pool and assigned to a user + that doesn't have a limit. Ensure the user is not using resources + of someone else. + */ + release_user_connection(thd); if (thd->killed || (net->error && net->vio != 0)) { diff --git a/sql/sql_connect.h b/sql/sql_connect.h index df6ac789709..2257a970ffa 100644 --- a/sql/sql_connect.h +++ b/sql/sql_connect.h @@ -33,6 +33,7 @@ void reset_mqh(LEX_USER *lu, bool get_them); bool check_mqh(THD *thd, uint check_command); void time_out_user_resource_limits(THD *thd, USER_CONN *uc); void decrease_user_connections(USER_CONN *uc); +void release_user_connection(THD *thd); bool thd_init_client_charset(THD *thd, uint cs_number); bool setup_connection_thread_globals(THD *thd); bool thd_prepare_connection(THD *thd); @@ -47,6 +48,6 @@ void prepare_new_connection_state(THD* thd); void end_connection(THD *thd); int get_or_create_user_conn(THD *thd, const char *user, const char *host, const USER_RESOURCES *mqh); -int check_for_max_user_connections(THD *thd, USER_CONN *uc); +int check_for_max_user_connections(THD *thd, const USER_CONN *uc); #endif /* SQL_CONNECT_INCLUDED */ diff --git a/sql/sql_parse.cc b/sql/sql_parse.cc index 3e5dfa43d41..ea07bfce0cb 100644 --- a/sql/sql_parse.cc +++ b/sql/sql_parse.cc @@ -949,7 +949,8 @@ bool dispatch_command(enum enum_server_command command, THD *thd, uint save_db_length= thd->db_length; char *save_db= thd->db; - USER_CONN *save_user_connect= thd->user_connect; + USER_CONN *save_user_connect= + const_cast(thd->get_user_connect()); Security_context save_security_ctx= *thd->security_ctx; CHARSET_INFO *save_character_set_client= thd->variables.character_set_client; @@ -964,7 +965,7 @@ bool dispatch_command(enum enum_server_command command, THD *thd, { my_free(thd->security_ctx->user); *thd->security_ctx= save_security_ctx; - thd->user_connect= save_user_connect; + thd->set_user_connect(save_user_connect); thd->reset_db (save_db, save_db_length); thd->variables.character_set_client= save_character_set_client; thd->variables.collation_connection= save_collation_connection; @@ -5583,7 +5584,7 @@ void mysql_parse(THD *thd, char *rawbuf, uint length, if (!err) { #ifndef NO_EMBEDDED_ACCESS_CHECKS - if (mqh_used && thd->user_connect && + if (mqh_used && thd->get_user_connect() && check_mqh(thd, lex->sql_command)) { thd->net.error = 0; diff --git a/sql/sys_vars.h b/sql/sys_vars.h index d9d83ed5615..a69a91f7eb7 100644 --- a/sql/sys_vars.h +++ b/sql/sys_vars.h @@ -799,8 +799,9 @@ public: { } uchar *session_value_ptr(THD *thd, LEX_STRING *base) { - if (thd->user_connect && thd->user_connect->user_resources.user_conn) - return (uchar*) &(thd->user_connect->user_resources.user_conn); + const USER_CONN *uc= thd->get_user_connect(); + if (uc && uc->user_resources.user_conn) + return (uchar*) &(uc->user_resources.user_conn); return global_value_ptr(thd, base); } }; From d8b2d4a0694156848db0862a230d248653f8ebe5 Mon Sep 17 00:00:00 2001 From: Rohit Kalhans Date: Tue, 29 May 2012 12:11:30 +0530 Subject: [PATCH 032/164] Bug#11762667: MYSQLBINLOG IGNORES ERRORS WHILE WRITING OUTPUT Problem: mysqlbinlog exits without any error code in case of file write error. It is because of the fact that the calls to Log_event::print() method does not return a value and the thus any error were being ignored. Resolution: We resolve this problem by checking for the IO_CACHE::error == -1 after every call to Log_event:: print() and terminating the further execution. client/mysqlbinlog.cc: - handled error conditions during event->print() calls - added check for error in end_io_cache() mysys/my_write.c: Added debug code to simulate file write error. error returned will be ENOSPC=> error no space on the disk sql/log_event.cc: Added debug code to simulate file write error, by reducing the size of io cache. --- client/mysqlbinlog.cc | 21 ++++++++++++++++++++- mysys/my_write.c | 12 +++++++++++- sql/log_event.cc | 6 ++++++ 3 files changed, 37 insertions(+), 2 deletions(-) diff --git a/client/mysqlbinlog.cc b/client/mysqlbinlog.cc index db48675ade2..dd09e7a0938 100644 --- a/client/mysqlbinlog.cc +++ b/client/mysqlbinlog.cc @@ -690,6 +690,7 @@ Exit_status process_event(PRINT_EVENT_INFO *print_event_info, Log_event *ev, DBUG_ENTER("process_event"); print_event_info->short_form= short_form; Exit_status retval= OK_CONTINUE; + IO_CACHE *const head= &print_event_info->head_cache; /* Format events are not concerned by --offset and such, we always need to @@ -753,6 +754,8 @@ Exit_status process_event(PRINT_EVENT_INFO *print_event_info, Log_event *ev, } else ev->print(result_file, print_event_info); + if (head->error == -1) + goto err; break; case CREATE_FILE_EVENT: @@ -804,6 +807,8 @@ Exit_status process_event(PRINT_EVENT_INFO *print_event_info, Log_event *ev, output of Append_block_log_event::print is only a comment. */ ev->print(result_file, print_event_info); + if (head->error == -1) + goto err; if ((retval= load_processor.process((Append_block_log_event*) ev)) != OK_CONTINUE) goto end; @@ -812,6 +817,8 @@ Exit_status process_event(PRINT_EVENT_INFO *print_event_info, Log_event *ev, case EXEC_LOAD_EVENT: { ev->print(result_file, print_event_info); + if (head->error == -1) + goto err; Execute_load_log_event *exv= (Execute_load_log_event*)ev; Create_file_log_event *ce= load_processor.grab_event(exv->file_id); /* @@ -841,6 +848,8 @@ Exit_status process_event(PRINT_EVENT_INFO *print_event_info, Log_event *ev, print_event_info->common_header_len= glob_description_event->common_header_len; ev->print(result_file, print_event_info); + if (head->error == -1) + goto err; if (!remote_opt) ev->free_temp_buf(); // free memory allocated in dump_local_log_entries else @@ -864,6 +873,8 @@ Exit_status process_event(PRINT_EVENT_INFO *print_event_info, Log_event *ev, break; case BEGIN_LOAD_QUERY_EVENT: ev->print(result_file, print_event_info); + if (head->error == -1) + goto err; if ((retval= load_processor.process((Begin_load_query_log_event*) ev)) != OK_CONTINUE) goto end; @@ -974,6 +985,8 @@ Exit_status process_event(PRINT_EVENT_INFO *print_event_info, Log_event *ev, } default: ev->print(result_file, print_event_info); + if (head->error == -1) + goto err; } } @@ -2012,7 +2025,13 @@ err: end: if (fd >= 0) my_close(fd, MYF(MY_WME)); - end_io_cache(file); + /* + Since the end_io_cache() writes to the + file errors may happen. + */ + if (end_io_cache(file)) + retval= ERROR_STOP; + return retval; } diff --git a/mysys/my_write.c b/mysys/my_write.c index f261c768dcb..b545ab776b0 100644 --- a/mysys/my_write.c +++ b/mysys/my_write.c @@ -38,7 +38,17 @@ size_t my_write(int Filedes, const uchar *Buffer, size_t Count, myf MyFlags) for (;;) { - if ((writenbytes= write(Filedes, Buffer, Count)) == Count) + writenbytes= write(Filedes, Buffer, Count); + /** + To simulate the write error set the errno = error code + and the number pf written bytes to -1. + */ + DBUG_EXECUTE_IF ("simulate_file_write_error", + { + errno= ENOSPC; + writenbytes= (size_t) -1; + }); + if (writenbytes == Count) break; if (writenbytes != (size_t) -1) { /* Safeguard */ diff --git a/sql/log_event.cc b/sql/log_event.cc index afcc283a6d1..e7c3419c34f 100644 --- a/sql/log_event.cc +++ b/sql/log_event.cc @@ -3090,6 +3090,12 @@ void Query_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info) { Write_on_release_cache cache(&print_event_info->head_cache, file); + /** + reduce the size of io cache so that the write function is called + for every call to my_b_write(). + */ + DBUG_EXECUTE_IF ("simulate_file_write_error", + {(&cache)->write_pos= (&cache)->write_end- 500;}); print_query_header(&cache, print_event_info); my_b_write(&cache, (uchar*) query, q_len); my_b_printf(&cache, "\n%s\n", print_event_info->delimiter); From 31a93ea75d00b54326e7f1975dccafdad4e35c5e Mon Sep 17 00:00:00 2001 From: Tor Didriksen Date: Tue, 29 May 2012 10:54:57 +0200 Subject: [PATCH 033/164] Bug#12845091 .EMPTY FILE IN /DATA/TEST PREVENTS USERS FROM DROPPING TEST DB ON 5.5 AND 5.6 --- sql/CMakeLists.txt | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/sql/CMakeLists.txt b/sql/CMakeLists.txt index 09672561c11..a3df9e7948b 100644 --- a/sql/CMakeLists.txt +++ b/sql/CMakeLists.txt @@ -264,7 +264,10 @@ IF(INSTALL_LAYOUT STREQUAL "STANDALONE") # We need to create empty directories (data/test) the installation. # This does not work with current CPack due to http://www.cmake.org/Bug/view.php?id=8767 # Avoid completely empty directories and install dummy file instead. -SET(DUMMY_FILE ${CMAKE_CURRENT_BINARY_DIR}/.empty ) +# Use a file extension so that it will be deleted in case someone does +# 'drop database test' +# See deletable_extentions. +SET(DUMMY_FILE ${CMAKE_CURRENT_BINARY_DIR}/dummy.bak ) FILE(WRITE ${DUMMY_FILE} "") INSTALL(FILES ${DUMMY_FILE} DESTINATION data/test COMPONENT DataFiles) From a2bc9b36696efb97879bc1bd4500156ea52a1b1a Mon Sep 17 00:00:00 2001 From: Annamalai Gurusami Date: Wed, 30 May 2012 10:05:04 +0530 Subject: [PATCH 034/164] Bug #13933132: [ERROR] GOT ERROR -1 WHEN READING TABLE APPEARED WHEN KILLING Suppose there is a query waiting for a lock. If the user kills this query, then "Got error -1 when reading table" error message must not be logged in the server log file. Since this is a user requested interruption, no spurious error message must be logged in the server log. This patch will remove the error message from the log. approved by joh and tatjana --- sql/sql_select.cc | 3 ++- storage/innobase/handler/ha_innodb.cc | 1 + 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/sql/sql_select.cc b/sql/sql_select.cc index 1cf52e88c12..7c3d2de22bc 100644 --- a/sql/sql_select.cc +++ b/sql/sql_select.cc @@ -11791,7 +11791,8 @@ int report_error(TABLE *table, int error) Locking reads can legally return also these errors, do not print them to the .err log */ - if (error != HA_ERR_LOCK_DEADLOCK && error != HA_ERR_LOCK_WAIT_TIMEOUT) + if (error != HA_ERR_LOCK_DEADLOCK && error != HA_ERR_LOCK_WAIT_TIMEOUT + && !table->in_use->killed) sql_print_error("Got error %d when reading table '%s'", error, table->s->path.str); table->file->print_error(error,MYF(0)); diff --git a/storage/innobase/handler/ha_innodb.cc b/storage/innobase/handler/ha_innodb.cc index 8ed082037f0..51b7007145c 100644 --- a/storage/innobase/handler/ha_innodb.cc +++ b/storage/innobase/handler/ha_innodb.cc @@ -4893,6 +4893,7 @@ ha_innobase::index_read( ulint ret; DBUG_ENTER("index_read"); + DEBUG_SYNC_C("ha_innobase_index_read_begin"); ut_a(prebuilt->trx == thd_to_trx(user_thd)); ut_ad(key_len != 0 || find_flag != HA_READ_KEY_EXACT); From 96eb519eb77b078f9f96935aacaded44e20ed95c Mon Sep 17 00:00:00 2001 From: Rohit Kalhans Date: Wed, 30 May 2012 13:54:15 +0530 Subject: [PATCH 035/164] Fixing the build failure on Windows debug build. --- sql/log_event.cc | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) diff --git a/sql/log_event.cc b/sql/log_event.cc index e7c3419c34f..a79797e4bc9 100644 --- a/sql/log_event.cc +++ b/sql/log_event.cc @@ -2852,17 +2852,24 @@ Query_log_event::Query_log_event(const char* buf, uint event_len, sql_parse.cc */ +#if !defined(MYSQL_CLIENT) && defined(HAVE_QUERY_CACHE) if (!(start= data_buf = (Log_event::Byte*) my_malloc(catalog_len + 1 + time_zone_len + 1 + user.length + 1 + host.length + 1 + data_len + 1 -#if !defined(MYSQL_CLIENT) && defined(HAVE_QUERY_CACHE) - + sizeof(size_t)//for db_len - + db_len + 1 - + QUERY_CACHE_FLAGS_SIZE + + sizeof(size_t)//for db_len + + db_len + 1 + + QUERY_CACHE_FLAGS_SIZE, + MYF(MY_WME)))) +#else + if (!(start= data_buf = (Log_event::Byte*) my_malloc(catalog_len + 1 + + time_zone_len + 1 + + user.length + 1 + + host.length + 1 + + data_len + 1, + MYF(MY_WME)))) #endif - , MYF(MY_WME)))) DBUG_VOID_RETURN; if (catalog_len) // If catalog is given { From f8a6521789eadeebc64c3001a1d5f04ef3c31a2e Mon Sep 17 00:00:00 2001 From: unknown Date: Wed, 30 May 2012 14:00:29 +0530 Subject: [PATCH 036/164] From f20a4c912dd1034d17f094804a15e0f4807922dd Mon Sep 17 00:00:00 2001 From: Tor Didriksen Date: Wed, 30 May 2012 12:47:29 +0200 Subject: [PATCH 037/164] Bug#12845091 .EMPTY FILE IN /DATA/TEST PREVENTS USERS FROM DROPPING TEST DB ON 5.5 AND 5.6 For those who build in-source, we need to change .bzrignore: s/.empty/dummy.bak/ --- .bzrignore | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/.bzrignore b/.bzrignore index c54083a4209..655cea20bc5 100644 --- a/.bzrignore +++ b/.bzrignore @@ -3059,7 +3059,7 @@ libmysql/merge_archives_mysqlclient.cmake libmysqld/merge_archives_mysqlserver.cmake libmysqld/mysqlserver_depends.c libmysqld/examples/mysql_embedded -sql/.empty +sql/dummy.bak mysys/thr_lock VERSION.dep info_macros.cmake From 367de4de2d62310fd0546a3fa1fab1e2b69b35b3 Mon Sep 17 00:00:00 2001 From: Nuno Carvalho Date: Wed, 30 May 2012 14:55:13 +0100 Subject: [PATCH 038/164] BUG#14135691: MISSING INITIALIZATION OF MYSQL_BIN_LOG::SYNC_COUNTER MYSQL_BIN_LOG::sync_counter is not initialized on MYSQL_BIN_LOG object creation. Added missing sync_counter initialization. --- sql/log.cc | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sql/log.cc b/sql/log.cc index 7f629658311..24cee143c71 100644 --- a/sql/log.cc +++ b/sql/log.cc @@ -2814,7 +2814,7 @@ const char *MYSQL_LOG::generate_name(const char *log_name, MYSQL_BIN_LOG::MYSQL_BIN_LOG(uint *sync_period) :bytes_written(0), prepared_xids(0), file_id(1), open_count(1), need_start_event(TRUE), - sync_period_ptr(sync_period), + sync_period_ptr(sync_period), sync_counter(0), is_relay_log(0), signal_cnt(0), description_event_for_exec(0), description_event_for_queue(0) { From 70d01f5182429751171b71246ef0e3fea30667af Mon Sep 17 00:00:00 2001 From: unknown Date: Thu, 31 May 2012 14:32:29 +0530 Subject: [PATCH 039/164] From cf48fcfba33c3c48aa52290a33a7b825e89827c2 Mon Sep 17 00:00:00 2001 From: Marc Alff Date: Thu, 31 May 2012 11:47:13 +0200 Subject: [PATCH 040/164] Bug 14116252 - CANNOT BUILD ARCHIVE ENGINE WHEN WITH_PERFSCHEMA_STORAGE_ENGINE=0 Fixed a build break with compiling without the performance schema, instrumentation should be protected by HAVE_PSI_INTERFACE --- storage/archive/azio.c | 2 ++ storage/archive/ha_archive.cc | 2 ++ 2 files changed, 4 insertions(+) diff --git a/storage/archive/azio.c b/storage/archive/azio.c index ec4b5bcb7cd..15b3434ab32 100644 --- a/storage/archive/azio.c +++ b/storage/archive/azio.c @@ -37,7 +37,9 @@ void putLong(File file, uLong x); uLong getLong(azio_stream *s); void read_header(azio_stream *s, unsigned char *buffer); +#ifdef HAVE_PSI_INTERFACE extern PSI_file_key arch_key_file_data; +#endif /* =========================================================================== Opens a gzip (.gz) file for reading or writing. The mode parameter diff --git a/storage/archive/ha_archive.cc b/storage/archive/ha_archive.cc index dba647b8d1a..24dbaefce27 100644 --- a/storage/archive/ha_archive.cc +++ b/storage/archive/ha_archive.cc @@ -114,7 +114,9 @@ static HASH archive_open_tables; #define DATA_BUFFER_SIZE 2 // Size of the data used in the data file #define ARCHIVE_CHECK_HEADER 254 // The number we use to determine corruption +#ifdef HAVE_PSI_INTERFACE extern "C" PSI_file_key arch_key_file_data; +#endif /* Static declarations for handerton */ static handler *archive_create_handler(handlerton *hton, From 2ebd927ec0ba2de6219dc23a01c3988273302b3e Mon Sep 17 00:00:00 2001 From: unknown Date: Thu, 31 May 2012 22:28:18 +0530 Subject: [PATCH 041/164] From 1c0388a5be8346a0a2c0e00caaf2a9c11f26830c Mon Sep 17 00:00:00 2001 From: Jon Olav Hauglid Date: Fri, 1 Jun 2012 09:31:24 +0200 Subject: [PATCH 042/164] Bug#13982017: ALTER TABLE RENAME ENDS UP WITH ERROR 1050 (42S01) Fixed by backport of: ------------------------------------------------------------ revno: 3402.50.156 committer: Jon Olav Hauglid branch nick: mysql-trunk-test timestamp: Wed 2012-02-08 14:10:23 +0100 message: Bug#13417754 ASSERT IN ROW_DROP_DATABASE_FOR_MYSQL DURING DROP SCHEMA This assert could be triggered if an InnoDB table was being moved to a different database using ALTER TABLE ... RENAME, while this database concurrently was being dropped by DROP DATABASE. The reason for the problem was that no metadata lock was taken on the target database by ALTER TABLE ... RENAME. DROP DATABASE was therefore not blocked and could remove the database while ALTER TABLE ... RENAME was executing. This could cause the assert in InnoDB to be triggered. This patch fixes the problem by taking a IX metadata lock on the target database before ALTER TABLE ... RENAME starts moving a table to a different database. Note that this problem did not occur with RENAME TABLE which already takes the correct metadata locks. Also note that this patch slightly changes the behavior of ALTER TABLE ... RENAME. Before, the statement would abort and return an error if a lock on the target table name could not be taken immediately. With this patch, ALTER TABLE ... RENAME will instead block and wait until the lock can be taken (or until we get a lock timeout). This also means that it is possible to get ER_LOCK_DEADLOCK errors in this situation since we allow ALTER TABLE ... RENAME to wait and not just abort immediately. --- mysql-test/r/create-big.result | 4 ++-- mysql-test/t/create-big.test | 27 ++++++++++++++++++++++---- sql/sql_table.cc | 28 ++++++++++++++++++++------- storage/innobase/handler/ha_innodb.cc | 3 +++ 4 files changed, 49 insertions(+), 13 deletions(-) diff --git a/mysql-test/r/create-big.result b/mysql-test/r/create-big.result index 34293d7e5cd..4cce5d8618c 100644 --- a/mysql-test/r/create-big.result +++ b/mysql-test/r/create-big.result @@ -53,8 +53,8 @@ set debug_sync='create_table_select_before_create SIGNAL parked WAIT_FOR go'; create table t1 select 1 as i;; set debug_sync='now WAIT_FOR parked'; alter table t3 rename to t1; -ERROR 42S01: Table 't1' already exists set debug_sync='now SIGNAL go'; +ERROR 42S01: Table 't1' already exists show create table t1; Table Create Table t1 CREATE TABLE `t1` ( @@ -65,8 +65,8 @@ set debug_sync='create_table_select_before_create SIGNAL parked WAIT_FOR go'; create table t1 select 1 as i;; set debug_sync='now WAIT_FOR parked'; alter table t3 rename to t1, add k int; -ERROR 42S01: Table 't1' already exists set debug_sync='now SIGNAL go'; +ERROR 42S01: Table 't1' already exists show create table t1; Table Create Table t1 CREATE TABLE `t1` ( diff --git a/mysql-test/t/create-big.test b/mysql-test/t/create-big.test index d487608f7e1..8d916f8da82 100644 --- a/mysql-test/t/create-big.test +++ b/mysql-test/t/create-big.test @@ -132,11 +132,20 @@ set debug_sync='create_table_select_before_create SIGNAL parked WAIT_FOR go'; --send create table t1 select 1 as i; connection addconroot1; set debug_sync='now WAIT_FOR parked'; ---error ER_TABLE_EXISTS_ERROR -alter table t3 rename to t1; +--send alter table t3 rename to t1 +connection addconroot2; +# Wait until the above ALTER TABLE RENAME is blocked due to CREATE +let $wait_condition= + select count(*) = 1 from information_schema.processlist + where state = "Waiting for table metadata lock" and + info = "alter table t3 rename to t1"; +--source include/wait_condition.inc set debug_sync='now SIGNAL go'; connection default; --reap +connection addconroot1; +--error ER_TABLE_EXISTS_ERROR +--reap connection default; show create table t1; drop table t1; @@ -146,11 +155,21 @@ set debug_sync='create_table_select_before_create SIGNAL parked WAIT_FOR go'; --send create table t1 select 1 as i; connection addconroot1; set debug_sync='now WAIT_FOR parked'; ---error ER_TABLE_EXISTS_ERROR -alter table t3 rename to t1, add k int; +--send alter table t3 rename to t1, add k int +connection addconroot2; +# Wait until the above ALTER TABLE RENAME is blocked due to CREATE +let $wait_condition= + select count(*) = 1 from information_schema.processlist + where state = "Waiting for table metadata lock" and + info = "alter table t3 rename to t1, add k int"; +--source include/wait_condition.inc set debug_sync='now SIGNAL go'; connection default; --reap +connection addconroot1; +--error ER_TABLE_EXISTS_ERROR +--reap +connection default; show create table t1; drop table t1,t3; diff --git a/sql/sql_table.cc b/sql/sql_table.cc index c146079fdb3..60ae2ed800b 100644 --- a/sql/sql_table.cc +++ b/sql/sql_table.cc @@ -5872,8 +5872,26 @@ bool mysql_alter_table(THD *thd,char *new_db, char *new_name, } else { + MDL_request_list mdl_requests; + MDL_request target_db_mdl_request; + target_mdl_request.init(MDL_key::TABLE, new_db, new_name, MDL_EXCLUSIVE, MDL_TRANSACTION); + mdl_requests.push_front(&target_mdl_request); + + /* + If we are moving the table to a different database, we also + need IX lock on the database name so that the target database + is protected by MDL while the table is moved. + */ + if (new_db != db) + { + target_db_mdl_request.init(MDL_key::SCHEMA, new_db, "", + MDL_INTENTION_EXCLUSIVE, + MDL_TRANSACTION); + mdl_requests.push_front(&target_db_mdl_request); + } + /* Global intention exclusive lock must have been already acquired when table to be altered was open, so there is no need to do it here. @@ -5882,14 +5900,10 @@ bool mysql_alter_table(THD *thd,char *new_db, char *new_name, "", "", MDL_INTENTION_EXCLUSIVE)); - if (thd->mdl_context.try_acquire_lock(&target_mdl_request)) + if (thd->mdl_context.acquire_locks(&mdl_requests, + thd->variables.lock_wait_timeout)) DBUG_RETURN(TRUE); - if (target_mdl_request.ticket == NULL) - { - /* Table exists and is locked by some thread. */ - my_error(ER_TABLE_EXISTS_ERROR, MYF(0), new_alias); - DBUG_RETURN(TRUE); - } + DEBUG_SYNC(thd, "locked_table_name"); /* Table maybe does not exist, but we got an exclusive lock diff --git a/storage/innobase/handler/ha_innodb.cc b/storage/innobase/handler/ha_innodb.cc index 19644ddc966..9f7290f5b2d 100644 --- a/storage/innobase/handler/ha_innodb.cc +++ b/storage/innobase/handler/ha_innodb.cc @@ -47,6 +47,7 @@ this program; if not, write to the Free Software Foundation, Inc., #include // PROCESS_ACL #include +#include // DEBUG_SYNC #include #include #include @@ -7691,6 +7692,8 @@ ha_innobase::rename_table( error = innobase_rename_table(trx, from, to, TRUE); + DEBUG_SYNC(thd, "after_innobase_rename_table"); + /* Tell the InnoDB server that there might be work for utility threads: */ From a28a2ca798e8a4912cf1b91b6e71eaa0a9fb8bb7 Mon Sep 17 00:00:00 2001 From: Annamalai Gurusami Date: Fri, 1 Jun 2012 14:12:57 +0530 Subject: [PATCH 043/164] Bug #13933132: [ERROR] GOT ERROR -1 WHEN READING TABLE APPEARED WHEN KILLING Suppose there is a query waiting for a lock. If the user kills this query, then "Got error -1 when reading table" error message must not be logged in the server log file. Since this is a user requested interruption, no spurious error message must be logged in the server log. This patch will remove the error message from the log. approved by joh and tatjana --- sql/sql_select.cc | 3 ++- storage/innobase/handler/ha_innodb.cc | 1 + 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/sql/sql_select.cc b/sql/sql_select.cc index 1cf52e88c12..7c3d2de22bc 100644 --- a/sql/sql_select.cc +++ b/sql/sql_select.cc @@ -11791,7 +11791,8 @@ int report_error(TABLE *table, int error) Locking reads can legally return also these errors, do not print them to the .err log */ - if (error != HA_ERR_LOCK_DEADLOCK && error != HA_ERR_LOCK_WAIT_TIMEOUT) + if (error != HA_ERR_LOCK_DEADLOCK && error != HA_ERR_LOCK_WAIT_TIMEOUT + && !table->in_use->killed) sql_print_error("Got error %d when reading table '%s'", error, table->s->path.str); table->file->print_error(error,MYF(0)); diff --git a/storage/innobase/handler/ha_innodb.cc b/storage/innobase/handler/ha_innodb.cc index 8ed082037f0..51b7007145c 100644 --- a/storage/innobase/handler/ha_innodb.cc +++ b/storage/innobase/handler/ha_innodb.cc @@ -4893,6 +4893,7 @@ ha_innobase::index_read( ulint ret; DBUG_ENTER("index_read"); + DEBUG_SYNC_C("ha_innobase_index_read_begin"); ut_a(prebuilt->trx == thd_to_trx(user_thd)); ut_ad(key_len != 0 || find_flag != HA_READ_KEY_EXACT); From 6e2ce8739c76fff5d5cf6ef9b7c9ae9dc157fc21 Mon Sep 17 00:00:00 2001 From: Tor Didriksen Date: Tue, 5 Jun 2012 12:27:20 +0200 Subject: [PATCH 044/164] Bug#13417440 : 63340: ARCHIVE FILE IO NOT INSTRUMENTED Followup patch: wrong result unless archive storage engine is available. --- mysql-test/suite/perfschema/t/query_cache.test | 1 + 1 file changed, 1 insertion(+) diff --git a/mysql-test/suite/perfschema/t/query_cache.test b/mysql-test/suite/perfschema/t/query_cache.test index 8c9e5fcd0ed..08292306a25 100644 --- a/mysql-test/suite/perfschema/t/query_cache.test +++ b/mysql-test/suite/perfschema/t/query_cache.test @@ -6,6 +6,7 @@ --source include/have_query_cache.inc --source include/not_embedded.inc --source include/have_perfschema.inc +--source include/have_archive.inc --disable_warnings drop table if exists t1; From 2b085e1fba410ceaea2585c9cff511a9cfd2f7ae Mon Sep 17 00:00:00 2001 From: Tor Didriksen Date: Tue, 5 Jun 2012 15:53:39 +0200 Subject: [PATCH 045/164] Bug#14051002 VALGRIND: CONDITIONAL JUMP OR MOVE IN RR_CMP / MY_QSORT Patch for 5.1 and 5.5: fix typo in byte comparison in rr_cmp() --- sql/records.cc | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sql/records.cc b/sql/records.cc index e275db83c93..da876f7554c 100644 --- a/sql/records.cc +++ b/sql/records.cc @@ -631,7 +631,7 @@ static int rr_cmp(uchar *a,uchar *b) if (a[4] != b[4]) return (int) a[4] - (int) b[4]; if (a[5] != b[5]) - return (int) a[1] - (int) b[5]; + return (int) a[5] - (int) b[5]; if (a[6] != b[6]) return (int) a[6] - (int) b[6]; return (int) a[7] - (int) b[7]; From 164080e4a8ec5ebb6b466eafe82bfa90e4a59fc0 Mon Sep 17 00:00:00 2001 From: Narayanan Venkateswaran Date: Thu, 7 Jun 2012 19:14:26 +0530 Subject: [PATCH 046/164] WL#6161 Integrating with InnoDB codebase in MySQL 5.5 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Changes in the InnoDB codebase required to compile and integrate the MEB codebase with MySQL 5.5. @ storage/innobase/btr/btr0btr.c Excluded buffer pool usage from MEB build. buf_pool_from_bpage calls are in buf0buf.ic, and the buffer pool functions from that file are disabled in MEB. @ storage/innobase/buf/buf0buf.c Disabling more buffer pool functions unused in MEB. @ storage/innobase/dict/dict0dict.c Disabling dict_ind_free that is unused in MEB. @ storage/innobase/dict/dict0mem.c The include #include "ha_prototypes.h" Was causing conflicts with definitions in my_global.h Linking C executable mysqlbackup libinnodb.a(dict0mem.c.o): In function `dict_mem_foreign_table_name_lookup_set': dict0mem.c:(.text+0x91c): undefined reference to `innobase_get_lower_case_table_names' libinnodb.a(dict0mem.c.o): In function `dict_mem_referenced_table_name_lookup_set': dict0mem.c:(.text+0x9fc): undefined reference to `innobase_get_lower_case_table_names' libinnodb.a(dict0mem.c.o): In function `dict_mem_foreign_table_name_lookup_set': dict0mem.c:(.text+0x96e): undefined reference to `innobase_casedn_str' libinnodb.a(dict0mem.c.o): In function `dict_mem_referenced_table_name_lookup_set': dict0mem.c:(.text+0xa4e): undefined reference to `innobase_casedn_str' collect2: ld returned 1 exit status make[2]: *** [mysqlbackup] Error 1 innobase_get_lower_case_table_names innobase_casedn_str are functions that are part of ha_innodb.cc that is not part of the build dict_mem_foreign_table_name_lookup_set function is not there in the current codebase, meaning we do not use it in MEB. @ storage/innobase/fil/fil0fil.c The srv_fast_shutdown variable is declared in srv0srv.c that is not compiled in the mysqlbackup codebase. This throws an undeclared error. From the Manual --------------- innodb_fast_shutdown -------------------- The InnoDB shutdown mode. The default value is 1 as of MySQL 3.23.50, which causes a “fast� shutdown (the normal type of shutdown). If the value is 0, InnoDB does a full purge and an insert buffer merge before a shutdown. These operations can take minutes, or even hours in extreme cases. If the value is 1, InnoDB skips these operations at shutdown. This ideally does not matter from mysqlbackup @ storage/innobase/ha/ha0ha.c In file included from /home/narayanan/mysql-server/mysql-5.5-meb-rel3.8-innodb-integration-1/storage/innobase/ha/ha0ha.c:34:0: /home/narayanan/mysql-server/mysql-5.5-meb-rel3.8-innodb-integration-1/storage/innobase/include/btr0sea.h:286:17: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘*’ token make[2]: *** [CMakeFiles/innodb.dir/home/narayanan/mysql-server/mysql-5.5-meb-rel3.8-innodb-integration-1/storage/innobase/ha/ha0ha.c.o] Error 1 make[1]: *** [CMakeFiles/innodb.dir/all] Error 2 make: *** [all] Error 2 # include "sync0rw.h" is excluded from hotbackup compilation in dict0dict.h This causes extern rw_lock_t* btr_search_latch_temp; to throw a failure because the definition of rw_lock_t is not found. @ storage/innobase/include/buf0buf.h Excluding buffer pool functions that are unused from the MEB codebase. @ storage/innobase/include/buf0buf.ic replicated the exclusion of #include "buf0flu.h" #include "buf0lru.h" #include "buf0rea.h" by looking at the current codebase in /src/innodb @ storage/innobase/include/dict0dict.h dict_table_x_lock_indexes, dict_table_x_unlock_indexes, dict_table_is_corrupted, dict_index_is_corrupted, buf_block_buf_fix_inc_func are unused in MEB and was leading to compilation errors and hence excluded. @ storage/innobase/include/dict0dict.ic dict_table_x_lock_indexes, dict_table_x_unlock_indexes, dict_table_is_corrupted, dict_index_is_corrupted, buf_block_buf_fix_inc_func are unused in MEB and was leading to compilation errors and hence excluded. @ storage/innobase/include/log0log.h /home/narayanan/mysql-server/mysql-5.5-meb-rel3.8-innodb-integration-1/storage/innobase/include/log0log.h: At top level: /home/narayanan/mysql-server/mysql-5.5-meb-rel3.8-innodb-integration-1/storage/innobase/include/log0log.h:767:2: error: expected specifier-qualifier-list before ââ ‚¬Ëœmutex_t’ mutex_t definitions were excluded as seen from ambient code hence excluding definition for log_flush_order_mutex also. @ storage/innobase/include/os0file.h Bug in InnoDB code, create_mode should have been create. @ storage/innobase/include/srv0srv.h In file included from /home/narayanan/mysql-server/mysql-5.5-meb-rel3.8-innodb-integration-1/storage/innobase/buf/buf0buf.c:50:0: /home/narayanan/mysql-server/mysql-5.5-meb-rel3.8-innodb-integration-1/storage/innobase/include/srv0srv.h: At top level: /home/narayanan/mysql-server/mysql-5.5-meb-rel3.8-innodb-integration-1/storage/innobase/include/srv0srv.h:120:16: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘srv_use_native_aio’ srv_use_native_aio - we do not use native aio of the OS anyway from MEB. MEB does not compile InnoDB with this option. Hence disabling it. @ storage/innobase/include/trx0sys.h [ 56%] Building C object CMakeFiles/innodb.dir/home/narayanan/mysql-server/mysql-5.5-meb-rel3.8-innodb-integration-1/storage/innobase/trx/trx0sys.c.o /home/narayanan/mysql-server/mysql-5.5-meb-rel3.8-innodb-integration-1/storage/innobase/trx/trx0sys.c: In function ‘trx_sys_read_file_format_id’: /home/narayanan/mysql-server/mysql-5.5-meb-rel3.8-innodb-integration-1/storage/innobase/trx/trx0sys.c:1499:20: error: ‘TRX_SYS_FILE_FORMAT_TAG_MAGIC_N’ undeclared (first use in this function) /home/narayanan/mysql-server/mysql-5.5-meb-rel3.8-innodb-integration-1/storage/innobase/trx/trx0sys.c:1499:20: note: each undeclared identifier is reported only once for each function it appears in /home/narayanan/mysql-server/mysql-5.5-meb-rel3.8-innodb-integration-1/storage/innobase/trx/trx0sys.c: At top level: /home/narayanan/mysql-server/mysql-5.5-meb-rel3.8-innodb-integration-1/storage/innobase/include/buf0buf.h:607:1: warning: ‘buf_block_buf_fix_inc_func’ declared ‘static’ but never defined make[2]: *** [CMakeFiles/innodb.dir/home/narayanan/mysql-server/mysql-5.5-meb-rel3.8-innodb-integration-1/storage/innobase/trx/trx0sys.c.o] Error 1 unused calls excluded to enable compilation @ storage/innobase/mem/mem0dbg.c excluding #include "ha_prototypes.h" that lead to definitions in ha_innodb.cc @ storage/innobase/os/os0file.c InnoDB not compiled with aio support from MEB anyway. Hence excluding this from the compilation. @ storage/innobase/page/page0zip.c page0zip.c:(.text+0x4e9e): undefined reference to `buf_pool_from_block' collect2: ld returned 1 exit status buf_pool_from_block defined in buf0buf.ic, most of the file is excluded for compilation of MEB @ storage/innobase/ut/ut0dbg.c excluding #include "ha_prototypes.h" since it leads to definitions in ha_innodb.cc innobase_basename(file) is defined in ha_innodb.cc. Hence excluding that also. @ storage/innobase/ut/ut0ut.c cal_tm unused from MEB, was leading to earnings, hence disabling for MEB. --- storage/innobase/btr/btr0btr.c | 4 ++++ storage/innobase/buf/buf0buf.c | 2 +- storage/innobase/dict/dict0dict.c | 14 ++++++++++++-- storage/innobase/dict/dict0mem.c | 4 +++- storage/innobase/fil/fil0fil.c | 2 ++ storage/innobase/ha/ha0ha.c | 16 +--------------- storage/innobase/include/btr0btr.h | 3 +++ storage/innobase/include/btr0types.h | 4 ++++ storage/innobase/include/buf0buf.h | 16 ++++++++-------- storage/innobase/include/buf0buf.ic | 2 ++ storage/innobase/include/dict0dict.h | 5 ++++- storage/innobase/include/dict0dict.ic | 2 ++ storage/innobase/include/log0log.h | 2 +- storage/innobase/include/os0file.h | 2 +- storage/innobase/include/srv0srv.h | 2 +- storage/innobase/include/trx0sys.h | 4 +--- storage/innobase/mem/mem0dbg.c | 4 +++- storage/innobase/os/os0file.c | 2 ++ storage/innobase/page/page0zip.c | 2 ++ storage/innobase/trx/trx0sys.c | 2 +- storage/innobase/ut/ut0dbg.c | 6 ++++-- storage/innobase/ut/ut0ut.c | 8 ++++++++ 22 files changed, 70 insertions(+), 38 deletions(-) diff --git a/storage/innobase/btr/btr0btr.c b/storage/innobase/btr/btr0btr.c index fc3cdaf3cf1..b714219e304 100644 --- a/storage/innobase/btr/btr0btr.c +++ b/storage/innobase/btr/btr0btr.c @@ -42,6 +42,7 @@ Created 6/2/1994 Heikki Tuuri #include "ibuf0ibuf.h" #include "trx0trx.h" +#endif /* UNIV_HOTBACKUP */ /**************************************************************//** Report that an index page is corrupted. */ UNIV_INTERN @@ -64,6 +65,7 @@ btr_corruption_report( buf_page_print(buf_block_get_frame(block), 0, 0); } +#ifndef UNIV_HOTBACKUP #ifdef UNIV_BLOB_DEBUG # include "srv0srv.h" # include "ut0rbt.h" @@ -1575,7 +1577,9 @@ btr_page_reorganize_low( dict_index_t* index, /*!< in: record descriptor */ mtr_t* mtr) /*!< in: mtr */ { +#ifndef UNIV_HOTBACKUP buf_pool_t* buf_pool = buf_pool_from_bpage(&block->page); +#endif /* !UNIV_HOTBACKUP */ page_t* page = buf_block_get_frame(block); page_zip_des_t* page_zip = buf_block_get_page_zip(block); buf_block_t* temp_block; diff --git a/storage/innobase/buf/buf0buf.c b/storage/innobase/buf/buf0buf.c index 1672057d552..fed07129b65 100644 --- a/storage/innobase/buf/buf0buf.c +++ b/storage/innobase/buf/buf0buf.c @@ -302,7 +302,6 @@ struct buf_chunk_struct{ was allocated for the frames */ buf_block_t* blocks; /*!< array of buffer control blocks */ }; -#endif /* !UNIV_HOTBACKUP */ /********************************************************************//** Gets the smallest oldest_modification lsn for any page in the pool. Returns @@ -438,6 +437,7 @@ buf_block_alloc( return(block); } +#endif /* !UNIV_HOTBACKUP */ /********************************************************************//** Calculates a page checksum which is stored to the page when it is written diff --git a/storage/innobase/dict/dict0dict.c b/storage/innobase/dict/dict0dict.c index a59401e8edf..6f2c2caffaf 100644 --- a/storage/innobase/dict/dict0dict.c +++ b/storage/innobase/dict/dict0dict.c @@ -169,6 +169,7 @@ void dict_field_print_low( /*=================*/ const dict_field_t* field); /*!< in: field */ +#ifndef UNIV_HOTBACKUP /*********************************************************************//** Frees a foreign key struct. */ static @@ -182,7 +183,7 @@ and unique key errors */ UNIV_INTERN FILE* dict_foreign_err_file = NULL; /* mutex protecting the foreign and unique error buffers */ UNIV_INTERN mutex_t dict_foreign_err_mutex; - +#endif /* !UNIV_HOTBACKUP */ /******************************************************************//** Makes all characters in a NUL-terminated UTF-8 string lower case. */ UNIV_INTERN @@ -2247,6 +2248,7 @@ dict_index_build_internal_non_clust( return(new_index); } +#ifndef UNIV_HOTBACKUP /*====================== FOREIGN KEY PROCESSING ========================*/ /*********************************************************************//** @@ -2511,6 +2513,7 @@ dict_foreign_find_equiv_index( FALSE/* allow columns to be NULL */)); } +#endif /* !UNIV_HOTBACKUP */ /**********************************************************************//** Returns an index object by matching on the name and column names and if more than one index matches return the index with the max id @@ -2570,6 +2573,7 @@ dict_table_get_index_by_max_id( return(found); } +#ifndef UNIV_HOTBACKUP /**********************************************************************//** Report an error in a foreign key definition. */ static @@ -2735,6 +2739,7 @@ dict_foreign_add_to_cache( return(DB_SUCCESS); } +#endif /* !UNIV_HOTBACKUP */ /*********************************************************************//** Scans from pointer onwards. Stops if is at the start of a copy of 'string' where characters are compared without case sensitivity, and @@ -3214,6 +3219,7 @@ end_of_string: } } +#ifndef UNIV_HOTBACKUP /*********************************************************************//** Finds the highest [number] for foreign key constraints of the table. Looks only at the >= 4.0.18-format id's, which are of the form @@ -4050,7 +4056,7 @@ syntax_error: } /*==================== END OF FOREIGN KEY PROCESSING ====================*/ - +#endif /* !UNIV_HOTBACKUP */ /**********************************************************************//** Returns an index object if it is found in the dictionary cache. Assumes that dict_sys->mutex is already being held. @@ -4411,6 +4417,7 @@ fake_statistics: dict_table_stats_unlock(table, RW_X_LATCH); } +#ifndef UNIV_HOTBACKUP /**********************************************************************//** Prints info of a foreign key constraint. */ static @@ -4441,6 +4448,7 @@ dict_foreign_print_low( fputs(" )\n", stderr); } +#endif /* !UNIV_HOTBACKUP */ /**********************************************************************//** Prints a table data. */ UNIV_INTERN @@ -4622,6 +4630,7 @@ dict_field_print_low( } } +#ifndef UNIV_HOTBACKUP /**********************************************************************//** Outputs info on a foreign key of a table in a format suitable for CREATE TABLE. */ @@ -4810,6 +4819,7 @@ dict_print_info_on_foreign_keys( mutex_exit(&(dict_sys->mutex)); } +#endif /* !UNIV_HOTBACKUP */ /********************************************************************//** Displays the names of the index and the table. */ UNIV_INTERN diff --git a/storage/innobase/dict/dict0mem.c b/storage/innobase/dict/dict0mem.c index 982cca5a796..a8ff501a700 100644 --- a/storage/innobase/dict/dict0mem.c +++ b/storage/innobase/dict/dict0mem.c @@ -33,8 +33,8 @@ Created 1/8/1996 Heikki Tuuri #include "data0type.h" #include "mach0data.h" #include "dict0dict.h" -#include "ha_prototypes.h" /* innobase_casedn_str()*/ #ifndef UNIV_HOTBACKUP +# include "ha_prototypes.h" /* innobase_casedn_str()*/ # include "lock0lock.h" #endif /* !UNIV_HOTBACKUP */ #ifdef UNIV_BLOB_DEBUG @@ -272,6 +272,7 @@ dict_mem_index_create( return(index); } +#ifndef UNIV_HOTBACKUP /**********************************************************************//** Creates and initializes a foreign constraint memory object. @return own: foreign constraint struct */ @@ -346,6 +347,7 @@ dict_mem_referenced_table_name_lookup_set( } } +#endif /* !UNIV_HOTBACKUP */ /**********************************************************************//** Adds a field definition to an index. NOTE: does not take a copy of the column name if the field is a column. The memory occupied diff --git a/storage/innobase/fil/fil0fil.c b/storage/innobase/fil/fil0fil.c index 0a467d40345..23fe76f2281 100644 --- a/storage/innobase/fil/fil0fil.c +++ b/storage/innobase/fil/fil0fil.c @@ -857,8 +857,10 @@ fil_node_close_file( ut_a(node->open); ut_a(node->n_pending == 0); ut_a(node->n_pending_flushes == 0); +#ifndef UNIV_HOTBACKUP ut_a(node->modification_counter == node->flush_counter || srv_fast_shutdown == 2); +#endif /* !UNIV_HOTBACKUP */ ret = os_file_close(node->handle); ut_a(ret); diff --git a/storage/innobase/ha/ha0ha.c b/storage/innobase/ha/ha0ha.c index 65046138275..4be0d296c7c 100644 --- a/storage/innobase/ha/ha0ha.c +++ b/storage/innobase/ha/ha0ha.c @@ -28,6 +28,7 @@ Created 8/22/1994 Heikki Tuuri #include "ha0ha.ic" #endif +#ifndef UNIV_HOTBACKUP #ifdef UNIV_DEBUG # include "buf0buf.h" #endif /* UNIV_DEBUG */ @@ -51,17 +52,13 @@ ha_create_func( hash table: must be a power of 2, or 0 */ { hash_table_t* table; -#ifndef UNIV_HOTBACKUP ulint i; -#endif /* !UNIV_HOTBACKUP */ ut_ad(ut_is_2pow(n_mutexes)); table = hash_create(n); #if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG -# ifndef UNIV_HOTBACKUP table->adaptive = TRUE; -# endif /* !UNIV_HOTBACKUP */ #endif /* UNIV_AHI_DEBUG || UNIV_DEBUG */ /* Creating MEM_HEAP_BTR_SEARCH type heaps can potentially fail, but in practise it never should in this case, hence the asserts. */ @@ -74,7 +71,6 @@ ha_create_func( return(table); } -#ifndef UNIV_HOTBACKUP hash_create_mutexes(table, n_mutexes, mutex_level); table->heaps = mem_alloc(n_mutexes * sizeof(void*)); @@ -83,7 +79,6 @@ ha_create_func( table->heaps[i] = mem_heap_create_in_btr_search(4096); ut_a(table->heaps[i]); } -#endif /* !UNIV_HOTBACKUP */ return(table); } @@ -134,7 +129,6 @@ ha_insert_for_fold_func( while (prev_node != NULL) { if (prev_node->fold == fold) { #if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG -# ifndef UNIV_HOTBACKUP if (table->adaptive) { buf_block_t* prev_block = prev_node->block; ut_a(prev_block->frame @@ -143,7 +137,6 @@ ha_insert_for_fold_func( prev_block->n_pointers--; block->n_pointers++; } -# endif /* !UNIV_HOTBACKUP */ prev_node->block = block; #endif /* UNIV_AHI_DEBUG || UNIV_DEBUG */ @@ -171,11 +164,9 @@ ha_insert_for_fold_func( ha_node_set_data(node, block, data); #if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG -# ifndef UNIV_HOTBACKUP if (table->adaptive) { block->n_pointers++; } -# endif /* !UNIV_HOTBACKUP */ #endif /* UNIV_AHI_DEBUG || UNIV_DEBUG */ node->fold = fold; @@ -217,13 +208,11 @@ ha_delete_hash_node( #endif /* UNIV_SYNC_DEBUG */ ut_ad(btr_search_enabled); #if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG -# ifndef UNIV_HOTBACKUP if (table->adaptive) { ut_a(del_node->block->frame = page_align(del_node->data)); ut_a(del_node->block->n_pointers > 0); del_node->block->n_pointers--; } -# endif /* !UNIV_HOTBACKUP */ #endif /* UNIV_AHI_DEBUG || UNIV_DEBUG */ HASH_DELETE_AND_COMPACT(ha_node_t, next, table, del_node); @@ -264,13 +253,11 @@ ha_search_and_update_if_found_func( if (node) { #if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG -# ifndef UNIV_HOTBACKUP if (table->adaptive) { ut_a(node->block->n_pointers > 0); node->block->n_pointers--; new_block->n_pointers++; } -# endif /* !UNIV_HOTBACKUP */ node->block = new_block; #endif /* UNIV_AHI_DEBUG || UNIV_DEBUG */ @@ -278,7 +265,6 @@ ha_search_and_update_if_found_func( } } -#ifndef UNIV_HOTBACKUP /*****************************************************************//** Removes from the chain determined by fold all nodes whose data pointer points to the page given. */ diff --git a/storage/innobase/include/btr0btr.h b/storage/innobase/include/btr0btr.h index f531b785786..5592995d4b2 100644 --- a/storage/innobase/include/btr0btr.h +++ b/storage/innobase/include/btr0btr.h @@ -92,6 +92,8 @@ insert/delete buffer when the record is not in the buffer pool. */ buffer when the record is not in the buffer pool. */ #define BTR_DELETE 8192 +#endif /* UNIV_HOTBACKUP */ + /**************************************************************//** Report that an index page is corrupted. */ UNIV_INTERN @@ -112,6 +114,7 @@ btr_corruption_report( ut_error; \ } +#ifndef UNIV_HOTBACKUP #ifdef UNIV_BLOB_DEBUG # include "ut0rbt.h" /** An index->blobs entry for keeping track of off-page column references */ diff --git a/storage/innobase/include/btr0types.h b/storage/innobase/include/btr0types.h index 5adc858b931..ef329af1aac 100644 --- a/storage/innobase/include/btr0types.h +++ b/storage/innobase/include/btr0types.h @@ -39,6 +39,8 @@ typedef struct btr_cur_struct btr_cur_t; /** B-tree search information for the adaptive hash index */ typedef struct btr_search_struct btr_search_t; +#ifndef UNIV_HOTBACKUP + /** @brief The latch protecting the adaptive search system This latch protects the @@ -54,6 +56,8 @@ Bear in mind (3) and (4) when using the hash index. */ extern rw_lock_t* btr_search_latch_temp; +#endif /* UNIV_HOTBACKUP */ + /** The latch protecting the adaptive search system */ #define btr_search_latch (*btr_search_latch_temp) diff --git a/storage/innobase/include/buf0buf.h b/storage/innobase/include/buf0buf.h index d9e6801eb86..7c81fe0c539 100644 --- a/storage/innobase/include/buf0buf.h +++ b/storage/innobase/include/buf0buf.h @@ -593,34 +593,34 @@ ib_uint64_t buf_block_get_modify_clock( /*=======================*/ buf_block_t* block); /*!< in: block */ -#else /* !UNIV_HOTBACKUP */ -# define buf_block_modify_clock_inc(block) ((void) 0) -#endif /* !UNIV_HOTBACKUP */ /*******************************************************************//** Increments the bufferfix count. */ UNIV_INLINE void buf_block_buf_fix_inc_func( /*=======================*/ -#ifdef UNIV_SYNC_DEBUG +# ifdef UNIV_SYNC_DEBUG const char* file, /*!< in: file name */ ulint line, /*!< in: line */ -#endif /* UNIV_SYNC_DEBUG */ +# endif /* UNIV_SYNC_DEBUG */ buf_block_t* block) /*!< in/out: block to bufferfix */ __attribute__((nonnull)); -#ifdef UNIV_SYNC_DEBUG +# ifdef UNIV_SYNC_DEBUG /** Increments the bufferfix count. @param b in/out: block to bufferfix @param f in: file name where requested @param l in: line number where requested */ # define buf_block_buf_fix_inc(b,f,l) buf_block_buf_fix_inc_func(f,l,b) -#else /* UNIV_SYNC_DEBUG */ +# else /* UNIV_SYNC_DEBUG */ /** Increments the bufferfix count. @param b in/out: block to bufferfix @param f in: file name where requested @param l in: line number where requested */ # define buf_block_buf_fix_inc(b,f,l) buf_block_buf_fix_inc_func(b) -#endif /* UNIV_SYNC_DEBUG */ +# endif /* UNIV_SYNC_DEBUG */ +#else /* !UNIV_HOTBACKUP */ +# define buf_block_modify_clock_inc(block) ((void) 0) +#endif /* !UNIV_HOTBACKUP */ /********************************************************************//** Calculates a page checksum which is stored to the page when it is written to a file. Note that we must be careful to calculate the same value diff --git a/storage/innobase/include/buf0buf.ic b/storage/innobase/include/buf0buf.ic index 917ee5dda84..0d9687e6b2a 100644 --- a/storage/innobase/include/buf0buf.ic +++ b/storage/innobase/include/buf0buf.ic @@ -31,6 +31,7 @@ Created 11/5/1995 Heikki Tuuri *******************************************************/ #include "mtr0mtr.h" +#ifndef UNIV_HOTBACKUP #include "buf0flu.h" #include "buf0lru.h" #include "buf0rea.h" @@ -180,6 +181,7 @@ buf_page_peek_if_too_old( return(!buf_page_peek_if_young(bpage)); } } +#endif /* !UNIV_HOTBACKUP */ /*********************************************************************//** Gets the state of a block. diff --git a/storage/innobase/include/dict0dict.h b/storage/innobase/include/dict0dict.h index 89d6fc66635..b609bce9d41 100644 --- a/storage/innobase/include/dict0dict.h +++ b/storage/innobase/include/dict0dict.h @@ -750,6 +750,7 @@ ulint dict_table_zip_size( /*================*/ const dict_table_t* table); /*!< in: table */ +#ifndef UNIV_HOTBACKUP /*********************************************************************//** Obtain exclusive locks on all index trees of the table. This is to prevent accessing index trees while InnoDB is updating internal metadata for @@ -766,6 +767,7 @@ void dict_table_x_unlock_indexes( /*========================*/ dict_table_t* table); /*!< in: table */ +#endif /* !UNIV_HOTBACKUP */ /********************************************************************//** Checks if a column is in the ordering columns of the clustered index of a table. Column prefixes are treated like whole columns. @@ -1251,7 +1253,7 @@ UNIV_INTERN void dict_close(void); /*============*/ - +#ifndef UNIV_HOTBACKUP /**********************************************************************//** Check whether the table is corrupted. @return nonzero for corrupted table, zero for valid tables */ @@ -1272,6 +1274,7 @@ dict_index_is_corrupted( const dict_index_t* index) /*!< in: index */ __attribute__((nonnull, pure, warn_unused_result)); +#endif /* !UNIV_HOTBACKUP */ /**********************************************************************//** Flags an index and table corrupted both in the data dictionary cache and in the system table SYS_INDEXES. */ diff --git a/storage/innobase/include/dict0dict.ic b/storage/innobase/include/dict0dict.ic index 7533ce01401..faa28959c59 100644 --- a/storage/innobase/include/dict0dict.ic +++ b/storage/innobase/include/dict0dict.ic @@ -491,6 +491,7 @@ dict_table_zip_size( return(dict_table_flags_to_zip_size(table->flags)); } +#ifndef UNIV_HOTBACKUP /*********************************************************************//** Obtain exclusive locks on all index trees of the table. This is to prevent accessing index trees while InnoDB is updating internal metadata for @@ -533,6 +534,7 @@ dict_table_x_unlock_indexes( rw_lock_x_unlock(dict_index_get_lock(index)); } } +#endif /* !UNIV_HOTBACKUP */ /********************************************************************//** Gets the number of fields in the internal representation of an index, including fields added by the dictionary system. diff --git a/storage/innobase/include/log0log.h b/storage/innobase/include/log0log.h index f2ab6a9898d..30250d4fd27 100644 --- a/storage/innobase/include/log0log.h +++ b/storage/innobase/include/log0log.h @@ -762,7 +762,6 @@ struct log_struct{ buffer */ #ifndef UNIV_HOTBACKUP mutex_t mutex; /*!< mutex protecting the log */ -#endif /* !UNIV_HOTBACKUP */ mutex_t log_flush_order_mutex;/*!< mutex to serialize access to the flush list when we are putting @@ -772,6 +771,7 @@ struct log_struct{ mtr_commit and still ensure that insertions in the flush_list happen in the LSN order. */ +#endif /* !UNIV_HOTBACKUP */ byte* buf_ptr; /* unaligned log buffer */ byte* buf; /*!< log buffer */ ulint buf_size; /*!< log buffer size in bytes */ diff --git a/storage/innobase/include/os0file.h b/storage/innobase/include/os0file.h index fb13120a481..8ef0906ff5f 100644 --- a/storage/innobase/include/os0file.h +++ b/storage/innobase/include/os0file.h @@ -309,7 +309,7 @@ to original un-instrumented file I/O APIs */ os_file_create_func(name, create, purpose, type, success) # define os_file_create_simple(key, name, create, access, success) \ - os_file_create_simple_func(name, create_mode, access, success) + os_file_create_simple_func(name, create, access, success) # define os_file_create_simple_no_error_handling( \ key, name, create_mode, access, success) \ diff --git a/storage/innobase/include/srv0srv.h b/storage/innobase/include/srv0srv.h index ed2f4672a99..5290ef5fe11 100644 --- a/storage/innobase/include/srv0srv.h +++ b/storage/innobase/include/srv0srv.h @@ -111,13 +111,13 @@ extern ulint srv_max_file_format_at_startup; /** Place locks to records only i.e. do not use next-key locking except on duplicate key checking and foreign key checking */ extern ibool srv_locks_unsafe_for_binlog; -#endif /* !UNIV_HOTBACKUP */ /* If this flag is TRUE, then we will use the native aio of the OS (provided we compiled Innobase with it in), otherwise we will use simulated aio we build below with threads. Currently we support native aio on windows and linux */ extern my_bool srv_use_native_aio; +#endif /* !UNIV_HOTBACKUP */ #ifdef __WIN__ extern ibool srv_use_native_conditions; #endif diff --git a/storage/innobase/include/trx0sys.h b/storage/innobase/include/trx0sys.h index 3913792d594..635e7ec30b6 100644 --- a/storage/innobase/include/trx0sys.h +++ b/storage/innobase/include/trx0sys.h @@ -222,7 +222,6 @@ UNIV_INLINE trx_id_t trx_sys_get_new_trx_id(void); /*========================*/ -#endif /* !UNIV_HOTBACKUP */ #ifdef UNIV_DEBUG /* Flag to control TRX_RSEG_N_SLOTS behavior debugging. */ @@ -239,7 +238,6 @@ trx_write_trx_id( /*=============*/ byte* ptr, /*!< in: pointer to memory where written */ trx_id_t id); /*!< in: id */ -#ifndef UNIV_HOTBACKUP /*****************************************************************//** Reads a trx id from an index page. In case that the id size changes in some future version, this function should be used instead of @@ -572,7 +570,6 @@ FIL_PAGE_ARCH_LOG_NO_OR_SPACE_NO. */ #define TRX_SYS_DOUBLEWRITE_BLOCK_SIZE FSP_EXTENT_SIZE /* @} */ -#ifndef UNIV_HOTBACKUP /** File format tag */ /* @{ */ /** The offset of the file format tag on the trx system header page @@ -591,6 +588,7 @@ identifier is added to this 64-bit constant. */ | TRX_SYS_FILE_FORMAT_TAG_MAGIC_N_LOW) /* @} */ +#ifndef UNIV_HOTBACKUP /** Doublewrite control struct */ struct trx_doublewrite_struct{ mutex_t mutex; /*!< mutex protecting the first_free field and diff --git a/storage/innobase/mem/mem0dbg.c b/storage/innobase/mem/mem0dbg.c index ae43d6097a6..0909b7c9a64 100644 --- a/storage/innobase/mem/mem0dbg.c +++ b/storage/innobase/mem/mem0dbg.c @@ -24,7 +24,9 @@ but is included in mem0mem.* ! Created 6/9/1994 Heikki Tuuri *************************************************************************/ -#include "ha_prototypes.h" +#ifndef UNIV_HOTBACKUP +# include "ha_prototypes.h" +#endif /* !UNIV_HOTBACKUP */ #ifdef UNIV_MEM_DEBUG # ifndef UNIV_HOTBACKUP diff --git a/storage/innobase/os/os0file.c b/storage/innobase/os/os0file.c index 502cb44a0fa..1c50e903965 100644 --- a/storage/innobase/os/os0file.c +++ b/storage/innobase/os/os0file.c @@ -303,6 +303,7 @@ UNIV_INTERN ulint os_n_pending_writes = 0; UNIV_INTERN ulint os_n_pending_reads = 0; #ifdef UNIV_DEBUG +# ifndef UNIV_HOTBACKUP /**********************************************************************//** Validates the consistency the aio system some of the time. @return TRUE if ok or the check was skipped */ @@ -329,6 +330,7 @@ os_aio_validate_skip(void) os_aio_validate_count = OS_AIO_VALIDATE_SKIP; return(os_aio_validate()); } +# endif /* !UNIV_HOTBACKUP */ #endif /* UNIV_DEBUG */ #ifdef __WIN__ diff --git a/storage/innobase/page/page0zip.c b/storage/innobase/page/page0zip.c index fb618beac7e..ca3836689d3 100644 --- a/storage/innobase/page/page0zip.c +++ b/storage/innobase/page/page0zip.c @@ -4433,7 +4433,9 @@ page_zip_reorganize( dict_index_t* index, /*!< in: index of the B-tree node */ mtr_t* mtr) /*!< in: mini-transaction */ { +#ifndef UNIV_HOTBACKUP buf_pool_t* buf_pool = buf_pool_from_block(block); +#endif /* !UNIV_HOTBACKUP */ page_zip_des_t* page_zip = buf_block_get_page_zip(block); page_t* page = buf_block_get_frame(block); buf_block_t* temp_block; diff --git a/storage/innobase/trx/trx0sys.c b/storage/innobase/trx/trx0sys.c index 78d11f2d248..3d1a6bbed33 100644 --- a/storage/innobase/trx/trx0sys.c +++ b/storage/innobase/trx/trx0sys.c @@ -134,12 +134,12 @@ UNIV_INTERN mysql_pfs_key_t trx_doublewrite_mutex_key; UNIV_INTERN mysql_pfs_key_t file_format_max_mutex_key; #endif /* UNIV_PFS_MUTEX */ +#ifndef UNIV_HOTBACKUP #ifdef UNIV_DEBUG /* Flag to control TRX_RSEG_N_SLOTS behavior debugging. */ uint trx_rseg_n_slots_debug = 0; #endif -#ifndef UNIV_HOTBACKUP /** This is used to track the maximum file format id known to InnoDB. It's updated via SET GLOBAL innodb_file_format_max = 'x' or when we open or create a table. */ diff --git a/storage/innobase/ut/ut0dbg.c b/storage/innobase/ut/ut0dbg.c index 64fadd76d1c..53ed4a53044 100644 --- a/storage/innobase/ut/ut0dbg.c +++ b/storage/innobase/ut/ut0dbg.c @@ -25,7 +25,9 @@ Created 1/30/1994 Heikki Tuuri #include "univ.i" #include "ut0dbg.h" -#include "ha_prototypes.h" +#ifndef UNIV_HOTBACKUP +# include "ha_prototypes.h" +#endif /* !UNIV_HOTBACKUP */ #if defined(__GNUC__) && (__GNUC__ > 2) #else @@ -56,7 +58,7 @@ ut_dbg_assertion_failed( ut_print_timestamp(stderr); #ifdef UNIV_HOTBACKUP fprintf(stderr, " InnoDB: Assertion failure in file %s line %lu\n", - innobase_basename(file), line); + file, line); #else /* UNIV_HOTBACKUP */ fprintf(stderr, " InnoDB: Assertion failure in thread %lu" diff --git a/storage/innobase/ut/ut0ut.c b/storage/innobase/ut/ut0ut.c index 117a777cb98..2fe45aad2a7 100644 --- a/storage/innobase/ut/ut0ut.c +++ b/storage/innobase/ut/ut0ut.c @@ -245,7 +245,9 @@ ut_print_timestamp( (int)cal_tm.wMinute, (int)cal_tm.wSecond); #else +#ifdef HAVE_LOCALTIME_R struct tm cal_tm; +#endif struct tm* cal_tm_ptr; time_t tm; @@ -288,7 +290,9 @@ ut_sprintf_timestamp( (int)cal_tm.wMinute, (int)cal_tm.wSecond); #else +#ifdef HAVE_LOCALTIME_R struct tm cal_tm; +#endif struct tm* cal_tm_ptr; time_t tm; @@ -333,7 +337,9 @@ ut_sprintf_timestamp_without_extra_chars( (int)cal_tm.wMinute, (int)cal_tm.wSecond); #else +#ifdef HAVE_LOCALTIME_R struct tm cal_tm; +#endif struct tm* cal_tm_ptr; time_t tm; @@ -374,7 +380,9 @@ ut_get_year_month_day( *month = (ulint)cal_tm.wMonth; *day = (ulint)cal_tm.wDay; #else +#ifdef HAVE_LOCALTIME_R struct tm cal_tm; +#endif struct tm* cal_tm_ptr; time_t tm; From d74c3df6ce335a5febbc49530b5e43625b68352d Mon Sep 17 00:00:00 2001 From: Bjorn Munch Date: Fri, 8 Jun 2012 16:31:03 +0200 Subject: [PATCH 047/164] Backport SuSE 11 fix to RPM spec file --- support-files/mysql.spec.sh | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/support-files/mysql.spec.sh b/support-files/mysql.spec.sh index a3d8554188e..5b9a296d90a 100644 --- a/support-files/mysql.spec.sh +++ b/support-files/mysql.spec.sh @@ -176,7 +176,7 @@ %endif %else %if %(test -f /etc/SuSE-release && echo 1 || echo 0) - %define susever %(rpm -qf --qf '%%{version}\\n' /etc/SuSE-release) + %define susever %(rpm -qf --qf '%%{version}\\n' /etc/SuSE-release | cut -d. -f1) %if "%susever" == "10" %define distro_description SUSE Linux Enterprise Server 10 %define distro_releasetag sles10 From 6094d190954285f43000dc44e03934ffb8582eb9 Mon Sep 17 00:00:00 2001 From: Jon Olav Hauglid Date: Tue, 12 Jun 2012 15:04:57 +0200 Subject: [PATCH 048/164] Bug#13586591 RQG GRAMMAR CONF/ENGINES/ENGINE_STRESS.YY CRASHES INNODB | TRX_STATE_NOT_STARTED The problem was that if DELETE with subselect caused a deadlock inside InnoDB, this deadlock was not properly handled by the SQL layer. This meant that the SQL layer would try to unlock the row after InnoDB had rolled back the transaction. This caused an assertion inside InnoDB. This patch fixes the problem by checking for errors reported by SQL_SELECT::skip_record() and not calling unlock_row() if any errors have been reported. --- sql/sql_delete.cc | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/sql/sql_delete.cc b/sql/sql_delete.cc index 4fd1815ad7f..1bbc9af0835 100644 --- a/sql/sql_delete.cc +++ b/sql/sql_delete.cc @@ -341,8 +341,14 @@ bool mysql_delete(THD *thd, TABLE_LIST *table_list, COND *conds, break; } } - else + /* + Don't try unlocking the row if skip_record reported an error since in + this case the transaction might have been rolled back already. + */ + else if (!thd->is_error()) table->file->unlock_row(); // Row failed selection, release lock on it + else + break; } killed_status= thd->killed; if (killed_status != THD::NOT_KILLED || thd->is_error()) From cf37a481f0114d4cdb40c4d8fb483939f6b1bc5a Mon Sep 17 00:00:00 2001 From: Harin Vadodaria Date: Wed, 13 Jun 2012 16:03:58 +0530 Subject: [PATCH 049/164] Bug#11753779: MAX_CONNECT_ERRORS WORKS ONLY WHEN 1ST INC_HOST_ERRORS() IS CALLED. Issue : Sequence of calling inc_host_errors() and reset_host_errors() required some changes in order to maintain correct connection error count. Solution : Call to reset_host_errors() is shifted to a location after which no calls to inc_host_errors() are made. --- sql/hostname.cc | 9 ++++++++ sql/sql_connect.cc | 54 ++++++++++++++++++++++++++++++++++++++++++---- 2 files changed, 59 insertions(+), 4 deletions(-) diff --git a/sql/hostname.cc b/sql/hostname.cc index 9796755e9fb..38316a8ee19 100644 --- a/sql/hostname.cc +++ b/sql/hostname.cc @@ -214,6 +214,15 @@ char * ip_to_hostname(struct in_addr *in, uint *errors) } my_gethostbyname_r_free(); #else + + DBUG_EXECUTE_IF("addr_fake_ipv4", + { + const char* fake_host= "santa.claus.ipv4.example.com"; + name=my_strdup(fake_host, MYF(0)); + add_hostname(in,name); + DBUG_RETURN(name); + };); + VOID(pthread_mutex_lock(&LOCK_hostname)); if (!(hp=gethostbyaddr((char*) in,sizeof(*in), AF_INET))) { diff --git a/sql/sql_connect.cc b/sql/sql_connect.cc index 21e2701d06c..7a934541d53 100644 --- a/sql/sql_connect.cc +++ b/sql/sql_connect.cc @@ -360,7 +360,6 @@ check_user(THD *thd, enum enum_server_command command, if (send_old_password_request(thd) || my_net_read(net) != SCRAMBLE_LENGTH_323 + 1) { - inc_host_errors(&thd->remote.sin_addr); my_error(ER_HANDSHAKE_ERROR, MYF(0)); DBUG_RETURN(1); } @@ -832,6 +831,19 @@ static int check_connection(THD *thd) my_error(ER_BAD_HOST_ERROR, MYF(0)); return 1; } + /* BEGIN : DEBUG */ + DBUG_EXECUTE_IF("addr_fake_ipv4", + { + struct sockaddr *sa= (sockaddr *) &net->vio->remote; + sa->sa_family= AF_INET; + struct in_addr *ip4= &((struct sockaddr_in *)sa)->sin_addr; + /* See RFC 5737, 192.0.2.0/23 is reserved */ + const char* fake= "192.0.2.4"; + ip4->s_addr= inet_addr(fake); + strcpy(ip, fake); + };); + /* END : DEBUG */ + if (!(thd->main_security_ctx.ip= my_strdup(ip,MYF(MY_WME)))) return 1; /* The error is set by my_strdup(). */ thd->main_security_ctx.host_or_ip= thd->main_security_ctx.ip; @@ -935,8 +947,6 @@ static int check_connection(THD *thd) #ifdef _CUSTOMCONFIG_ #include "_cust_sql_parse.h" #endif - if (connect_errors) - reset_host_errors(&thd->remote.sin_addr); if (thd->packet.alloc(thd->variables.net_buffer_length)) return 1; /* The error is set by alloc(). */ @@ -953,6 +963,10 @@ static int check_connection(THD *thd) Peek ahead on the client capability packet and determine which version of the protocol should be used. */ + DBUG_EXECUTE_IF("host_error_packet_length", + { + bytes_remaining_in_packet= 0; + };); if (bytes_remaining_in_packet < 2) goto error; @@ -1011,6 +1025,10 @@ static int check_connection(THD *thd) skip_to_ssl: + DBUG_EXECUTE_IF("host_error_charset", + { + goto error; + };); DBUG_PRINT("info", ("client_character_set: %u", charset_code)); if (thd_init_client_charset(thd, charset_code)) goto error; @@ -1079,6 +1097,10 @@ skip_to_ssl: bytes_remaining_in_packet -= AUTH_PACKET_HEADER_SIZE_PROTO_40; } + DBUG_EXECUTE_IF("host_error_SSL_layering", + { + packet_has_required_size= 0; + };); if (!packet_has_required_size) goto error; } @@ -1104,6 +1126,11 @@ skip_to_ssl: get_string= get_40_protocol_string; user= get_string(&end, &bytes_remaining_in_packet, &user_len); + DBUG_EXECUTE_IF("host_error_user", + { + user= NULL; + };); + if (user == NULL) goto error; @@ -1131,6 +1158,11 @@ skip_to_ssl: passwd= get_string(&end, &bytes_remaining_in_packet, &passwd_len); } + DBUG_EXECUTE_IF("host_error_password", + { + passwd= NULL; + };); + if (passwd == NULL) goto error; @@ -1191,7 +1223,21 @@ skip_to_ssl: if (!(thd->main_security_ctx.user= my_strdup(user, MYF(MY_WME)))) return 1; /* The error is set by my_strdup(). */ - return check_user(thd, COM_CONNECT, passwd, passwd_len, db, TRUE); + + if (!check_user(thd, COM_CONNECT, passwd, passwd_len, db, TRUE)) + { + /* + Call to reset_host_errors() should be made only when all sanity checks + are done and connection is going to be a successful. + */ + reset_host_errors(&thd->remote.sin_addr); + return 0; + } + else + { + inc_host_errors(&thd->remote.sin_addr); + return 1; + } error: inc_host_errors(&thd->remote.sin_addr); From 775293b898aa6c5239b17de5d489768de5287803 Mon Sep 17 00:00:00 2001 From: unknown Date: Thu, 14 Jun 2012 17:07:49 +0530 Subject: [PATCH 050/164] BUG #13946716: FEDERATED_PLUGIN TEST CASE FAIL ON 64BIT ARCHITECTURES --- mysql-test/mysql-test-run.pl | 2 ++ 1 file changed, 2 insertions(+) diff --git a/mysql-test/mysql-test-run.pl b/mysql-test/mysql-test-run.pl index 294dcf13615..674abe7e102 100755 --- a/mysql-test/mysql-test-run.pl +++ b/mysql-test/mysql-test-run.pl @@ -1969,6 +1969,7 @@ sub environment_setup { my $lib_example_plugin= mtr_file_exists(vs_config_dirs('storage/example',$plugin_filename), "$basedir/storage/example/.libs/".$plugin_filename, + "$basedir/lib64/mysql/plugin/".$plugin_filename, "$basedir/lib/mysql/plugin/".$plugin_filename); $ENV{'EXAMPLE_PLUGIN'}= ($lib_example_plugin ? basename($lib_example_plugin) : ""); @@ -1991,6 +1992,7 @@ sub environment_setup { my $lib_fed_plugin= mtr_file_exists(vs_config_dirs('storage/federated',$fedplug_filename), "$basedir/storage/federated/.libs/".$fedplug_filename, + "$basedir/lib64/mysql/plugin/".$fedplug_filename, "$basedir/lib/mysql/plugin/".$fedplug_filename); $ENV{'FEDERATED_PLUGIN'}= $fedplug_filename; From bd223999dcd20f67a087ba1dadeecd41a0c5622f Mon Sep 17 00:00:00 2001 From: Sunanda Menon Date: Fri, 15 Jun 2012 10:34:18 +0200 Subject: [PATCH 051/164] Raising the VERSION number after 5.5.26 clone-off --- VERSION | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/VERSION b/VERSION index a6ecc1acc76..2ac736f0617 100644 --- a/VERSION +++ b/VERSION @@ -1,4 +1,4 @@ MYSQL_VERSION_MAJOR=5 MYSQL_VERSION_MINOR=5 -MYSQL_VERSION_PATCH=26 +MYSQL_VERSION_PATCH=27 MYSQL_VERSION_EXTRA= From bc42eaf95283f66788a70acbed1d7368c784a9a1 Mon Sep 17 00:00:00 2001 From: unknown Date: Fri, 15 Jun 2012 13:31:27 +0200 Subject: [PATCH 052/164] Raise version number after cloning 5.1.64 --- configure.in | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/configure.in b/configure.in index 84295a15f4a..4e7a3303353 100644 --- a/configure.in +++ b/configure.in @@ -12,7 +12,7 @@ dnl dnl When changing the major version number please also check the switch dnl statement in mysqlbinlog::check_master_version(). You may also need dnl to update version.c in ndb. -AC_INIT([MySQL Server], [5.1.64], [], [mysql]) +AC_INIT([MySQL Server], [5.1.65], [], [mysql]) AC_CONFIG_SRCDIR([sql/mysqld.cc]) AC_CANONICAL_SYSTEM From cac1cd88abc2a610b42b89e5d39029f75a760ec4 Mon Sep 17 00:00:00 2001 From: "Norvald H. Ryeng" Date: Mon, 18 Jun 2012 09:20:12 +0200 Subject: [PATCH 053/164] Bug#13003736 CRASH IN ITEM_REF::WALK WITH SUBQUERIES Problem: Some queries with subqueries and a HAVING clause that consists only of a column not in the select or grouping lists causes the server to crash. During parsing, an Item_ref is constructed for the HAVING column. The name of the column is resolved when JOIN::prepare calls fix_fields() on its having clause. Since the column is not mentioned in the select or grouping lists, a ref pointer is not found and a new Item_field is created instead. The Item_ref is replaced by the Item_field in the tree of HAVING clauses. Since the tree consists only of this item, the pointer that is updated is JOIN::having. However, st_select_lex::having still points to the Item_ref as the root of the tree of HAVING clauses. The bug is triggered when doing filesort for create_sort_index(). When find_all_keys() calls select->cond->walk() it eventually reaches Item_subselect::walk() where it continues to walk the having clauses from lex->having. This means that it finds the Item_ref instead of the new Item_field, and Item_ref::walk() tries to dereference the ref pointer, which is still null. The crash is reproducible only in 5.5, but the problem lies latent in 5.1 and trunk as well. Fix: After calling fix_fields on the having clause in JOIN::prepare(), set select_lex::having to point to the same item as JOIN::having. This patch also fixes a bug in 5.1 and 5.5 that is triggered if the query is executed as a prepared statement. The Item_field is created in the runtime arena when the query is prepared, and the pointer to the item is saved by st_select_lex::fix_prepare_information() and brought back as a dangling pointer when the query is executed, after the runtime arena has been reclaimed. Fix: Backport fix from trunk that switches to the permanent arena before calling Item_ref::fix_fields() in JOIN::prepare(). sql/item.cc: Set context when creating Item_field. sql/sql_select.cc: Switch to permanent arena and update select_lex->having. --- sql/item.cc | 2 +- sql/sql_select.cc | 6 ++++++ 2 files changed, 7 insertions(+), 1 deletion(-) diff --git a/sql/item.cc b/sql/item.cc index 90bfb0d2852..356fe4827c8 100644 --- a/sql/item.cc +++ b/sql/item.cc @@ -6010,7 +6010,7 @@ bool Item_ref::fix_fields(THD *thd, Item **reference) if (from_field != not_found_field) { Item_field* fld; - if (!(fld= new Item_field(from_field))) + if (!(fld= new Item_field(thd, last_checked_context, from_field))) goto error; thd->change_item_tree(reference, fld); mark_as_dependent(thd, last_checked_context->select_lex, diff --git a/sql/sql_select.cc b/sql/sql_select.cc index 7c3d2de22bc..f2007f609e0 100644 --- a/sql/sql_select.cc +++ b/sql/sql_select.cc @@ -528,6 +528,8 @@ JOIN::prepare(Item ***rref_pointer_array, if (having) { + Query_arena backup, *arena; + arena= thd->activate_stmt_arena_if_needed(&backup); nesting_map save_allow_sum_func= thd->lex->allow_sum_func; thd->where="having clause"; thd->lex->allow_sum_func|= 1 << select_lex_arg->nest_level; @@ -536,6 +538,10 @@ JOIN::prepare(Item ***rref_pointer_array, (having->fix_fields(thd, &having) || having->check_cols(1))); select_lex->having_fix_field= 0; + select_lex->having= having; + if (arena) + thd->restore_active_arena(arena, &backup); + if (having_fix_rc || thd->is_error()) DBUG_RETURN(-1); /* purecov: inspected */ thd->lex->allow_sum_func= save_allow_sum_func; From 61e428eb846e820ba0764932d1604859e53abe52 Mon Sep 17 00:00:00 2001 From: Harin Vadodaria Date: Tue, 19 Jun 2012 12:56:40 +0530 Subject: [PATCH 054/164] Bug#11753779: MAX_CONNECT_ERRORS WORKS ONLY WHEN 1ST INC_HOST_ERRORS() IS CALLED. Description: Reverting patch 3755 for bug#11753779 --- sql/hostname.cc | 9 -------- sql/sql_connect.cc | 54 ++++------------------------------------------ 2 files changed, 4 insertions(+), 59 deletions(-) diff --git a/sql/hostname.cc b/sql/hostname.cc index 38316a8ee19..9796755e9fb 100644 --- a/sql/hostname.cc +++ b/sql/hostname.cc @@ -214,15 +214,6 @@ char * ip_to_hostname(struct in_addr *in, uint *errors) } my_gethostbyname_r_free(); #else - - DBUG_EXECUTE_IF("addr_fake_ipv4", - { - const char* fake_host= "santa.claus.ipv4.example.com"; - name=my_strdup(fake_host, MYF(0)); - add_hostname(in,name); - DBUG_RETURN(name); - };); - VOID(pthread_mutex_lock(&LOCK_hostname)); if (!(hp=gethostbyaddr((char*) in,sizeof(*in), AF_INET))) { diff --git a/sql/sql_connect.cc b/sql/sql_connect.cc index 7a934541d53..21e2701d06c 100644 --- a/sql/sql_connect.cc +++ b/sql/sql_connect.cc @@ -360,6 +360,7 @@ check_user(THD *thd, enum enum_server_command command, if (send_old_password_request(thd) || my_net_read(net) != SCRAMBLE_LENGTH_323 + 1) { + inc_host_errors(&thd->remote.sin_addr); my_error(ER_HANDSHAKE_ERROR, MYF(0)); DBUG_RETURN(1); } @@ -831,19 +832,6 @@ static int check_connection(THD *thd) my_error(ER_BAD_HOST_ERROR, MYF(0)); return 1; } - /* BEGIN : DEBUG */ - DBUG_EXECUTE_IF("addr_fake_ipv4", - { - struct sockaddr *sa= (sockaddr *) &net->vio->remote; - sa->sa_family= AF_INET; - struct in_addr *ip4= &((struct sockaddr_in *)sa)->sin_addr; - /* See RFC 5737, 192.0.2.0/23 is reserved */ - const char* fake= "192.0.2.4"; - ip4->s_addr= inet_addr(fake); - strcpy(ip, fake); - };); - /* END : DEBUG */ - if (!(thd->main_security_ctx.ip= my_strdup(ip,MYF(MY_WME)))) return 1; /* The error is set by my_strdup(). */ thd->main_security_ctx.host_or_ip= thd->main_security_ctx.ip; @@ -947,6 +935,8 @@ static int check_connection(THD *thd) #ifdef _CUSTOMCONFIG_ #include "_cust_sql_parse.h" #endif + if (connect_errors) + reset_host_errors(&thd->remote.sin_addr); if (thd->packet.alloc(thd->variables.net_buffer_length)) return 1; /* The error is set by alloc(). */ @@ -963,10 +953,6 @@ static int check_connection(THD *thd) Peek ahead on the client capability packet and determine which version of the protocol should be used. */ - DBUG_EXECUTE_IF("host_error_packet_length", - { - bytes_remaining_in_packet= 0; - };); if (bytes_remaining_in_packet < 2) goto error; @@ -1025,10 +1011,6 @@ static int check_connection(THD *thd) skip_to_ssl: - DBUG_EXECUTE_IF("host_error_charset", - { - goto error; - };); DBUG_PRINT("info", ("client_character_set: %u", charset_code)); if (thd_init_client_charset(thd, charset_code)) goto error; @@ -1097,10 +1079,6 @@ skip_to_ssl: bytes_remaining_in_packet -= AUTH_PACKET_HEADER_SIZE_PROTO_40; } - DBUG_EXECUTE_IF("host_error_SSL_layering", - { - packet_has_required_size= 0; - };); if (!packet_has_required_size) goto error; } @@ -1126,11 +1104,6 @@ skip_to_ssl: get_string= get_40_protocol_string; user= get_string(&end, &bytes_remaining_in_packet, &user_len); - DBUG_EXECUTE_IF("host_error_user", - { - user= NULL; - };); - if (user == NULL) goto error; @@ -1158,11 +1131,6 @@ skip_to_ssl: passwd= get_string(&end, &bytes_remaining_in_packet, &passwd_len); } - DBUG_EXECUTE_IF("host_error_password", - { - passwd= NULL; - };); - if (passwd == NULL) goto error; @@ -1223,21 +1191,7 @@ skip_to_ssl: if (!(thd->main_security_ctx.user= my_strdup(user, MYF(MY_WME)))) return 1; /* The error is set by my_strdup(). */ - - if (!check_user(thd, COM_CONNECT, passwd, passwd_len, db, TRUE)) - { - /* - Call to reset_host_errors() should be made only when all sanity checks - are done and connection is going to be a successful. - */ - reset_host_errors(&thd->remote.sin_addr); - return 0; - } - else - { - inc_host_errors(&thd->remote.sin_addr); - return 1; - } + return check_user(thd, COM_CONNECT, passwd, passwd_len, db, TRUE); error: inc_host_errors(&thd->remote.sin_addr); From 983fcfaf62fbd4169afd0a3e6182ea46705fa3f5 Mon Sep 17 00:00:00 2001 From: Kent Boortz Date: Wed, 20 Jun 2012 13:10:13 +0200 Subject: [PATCH 055/164] Version for this release build is 5.1.64 --- configure.in | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/configure.in b/configure.in index 4e7a3303353..84295a15f4a 100644 --- a/configure.in +++ b/configure.in @@ -12,7 +12,7 @@ dnl dnl When changing the major version number please also check the switch dnl statement in mysqlbinlog::check_master_version(). You may also need dnl to update version.c in ndb. -AC_INIT([MySQL Server], [5.1.65], [], [mysql]) +AC_INIT([MySQL Server], [5.1.64], [], [mysql]) AC_CONFIG_SRCDIR([sql/mysqld.cc]) AC_CANONICAL_SYSTEM From 5c724f7b9430bb3794f6e12709268ce5502104e5 Mon Sep 17 00:00:00 2001 From: Joerg Bruehe Date: Thu, 21 Jun 2012 16:26:50 +0200 Subject: [PATCH 056/164] Fixing wrong comment syntax (discovered by Kent) --- sql/rpl_utility.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sql/rpl_utility.h b/sql/rpl_utility.h index 81a10cca814..b2577643add 100644 --- a/sql/rpl_utility.h +++ b/sql/rpl_utility.h @@ -300,7 +300,7 @@ private: public: Deferred_log_events(Relay_log_info *rli); ~Deferred_log_events(); - /* queue for exection at Query-log-event time prior the Query */; + /* queue for exection at Query-log-event time prior the Query */ int add(Log_event *ev); bool is_empty(); bool execute(Relay_log_info *rli); From 60561ae6133cf40f4fc445e1d6e8f395a20b2573 Mon Sep 17 00:00:00 2001 From: unknown Date: Thu, 21 Jun 2012 18:47:13 +0300 Subject: [PATCH 057/164] Fix for LP bug#1001505 and LP bug#1001510 We set correct cmp_context during preparation to avoid changing it later by Item_field::equal_fields_propagator. (see mysql bugs #57135 #57692 during merging) --- mysql-test/r/case.result | 4 ++++ mysql-test/r/compare.result | 4 ++++ mysql-test/t/case.test | 10 ++++++++++ mysql-test/t/compare.test | 8 ++++++++ sql/item_cmpfunc.cc | 19 +++++++++++++++++++ 5 files changed, 45 insertions(+) diff --git a/mysql-test/r/case.result b/mysql-test/r/case.result index 0c0e2d623c8..811bbee1d91 100644 --- a/mysql-test/r/case.result +++ b/mysql-test/r/case.result @@ -218,3 +218,7 @@ a d 3 11120436154190595086 drop table t1, t2; End of 5.0 tests +CREATE TABLE t1(a YEAR); +SELECT 1 FROM t1 WHERE a=1 AND CASE 1 WHEN a THEN 1 ELSE 1 END; +1 +DROP TABLE t1; diff --git a/mysql-test/r/compare.result b/mysql-test/r/compare.result index 796821a87bd..5168eb38586 100644 --- a/mysql-test/r/compare.result +++ b/mysql-test/r/compare.result @@ -96,3 +96,7 @@ SELECT * FROM t1 WHERE a > '2008-01-01' AND a = '0000-00-00'; a DROP TABLE t1; End of 5.0 tests +CREATE TABLE t1(a INT ZEROFILL); +SELECT 1 FROM t1 WHERE t1.a IN (1, t1.a) AND t1.a=2; +1 +DROP TABLE t1; diff --git a/mysql-test/t/case.test b/mysql-test/t/case.test index 028c64d6de7..81855dfc97f 100644 --- a/mysql-test/t/case.test +++ b/mysql-test/t/case.test @@ -170,3 +170,13 @@ select t1.a, (case t1.a when 0 then 0 else t1.b end) d from t1 drop table t1, t2; --echo End of 5.0 tests + +# +# LP BUG#1001510 +# Bug #11764313 57135: CRASH IN ITEM_FUNC_CASE::FIND_ITEM WITH CASE WHEN +# ELSE CLAUSE +# + +CREATE TABLE t1(a YEAR); +SELECT 1 FROM t1 WHERE a=1 AND CASE 1 WHEN a THEN 1 ELSE 1 END; +DROP TABLE t1; diff --git a/mysql-test/t/compare.test b/mysql-test/t/compare.test index 103244eb2f7..d2b2a7e5523 100644 --- a/mysql-test/t/compare.test +++ b/mysql-test/t/compare.test @@ -86,3 +86,11 @@ SELECT * FROM t1 WHERE a > '2008-01-01' AND a = '0000-00-00'; DROP TABLE t1; --echo End of 5.0 tests + +# +# Bug #11764818 57692: Crash in item_func_in::val_int() with ZEROFILL +# + +CREATE TABLE t1(a INT ZEROFILL); +SELECT 1 FROM t1 WHERE t1.a IN (1, t1.a) AND t1.a=2; +DROP TABLE t1; diff --git a/sql/item_cmpfunc.cc b/sql/item_cmpfunc.cc index 61554bdf420..847c51b8a5e 100644 --- a/sql/item_cmpfunc.cc +++ b/sql/item_cmpfunc.cc @@ -3095,6 +3095,15 @@ void Item_func_case::fix_length_and_dec() return; } } + /* + Set cmp_context of all WHEN arguments. This prevents + Item_field::equal_fields_propagator() from transforming a + zerofill argument into a string constant. Such a change would + require rebuilding cmp_items. + */ + for (i= 0; i < ncases; i+= 2) + args[i]->cmp_context= item_cmp_type(left_result_type, + args[i]->result_type()); } if (else_expr_num == -1 || args[else_expr_num]->maybe_null) @@ -4081,6 +4090,16 @@ void Item_func_in::fix_length_and_dec() } } } + /* + Set cmp_context of all arguments. This prevents + Item_field::equal_fields_propagator() from transforming a zerofill integer + argument into a string constant. Such a change would require rebuilding + cmp_itmes. + */ + for (arg= args + 1, arg_end= args + arg_count; arg != arg_end ; arg++) + { + arg[0]->cmp_context= item_cmp_type(left_result_type, arg[0]->result_type()); + } max_length= 1; } From 5f86ecbf362bc32ec86d7118288b305af74e2fb3 Mon Sep 17 00:00:00 2001 From: Kent Boortz Date: Tue, 26 Jun 2012 16:30:15 +0200 Subject: [PATCH 058/164] Solve a linkage problem with "libmysqld" on several Solaris platforms: a multiple definition of 'THD::clear_error()' in (at least) libmysqld.a(lib_sql.o) and libmysqld.a(libfederated_a-ha_federated.o). Patch provided by Ramil Kalimullin. --- libmysqld/lib_sql.cc | 6 ------ sql/sql_class.h | 3 +-- 2 files changed, 1 insertion(+), 8 deletions(-) diff --git a/libmysqld/lib_sql.cc b/libmysqld/lib_sql.cc index 4afe02efbdb..18b8383406a 100644 --- a/libmysqld/lib_sql.cc +++ b/libmysqld/lib_sql.cc @@ -756,12 +756,6 @@ void THD::clear_data_list() cur_data= 0; } -void THD::clear_error() -{ - if (main_da.is_error()) - main_da.reset_diagnostics_area(); -} - static char *dup_str_aux(MEM_ROOT *root, const char *from, uint length, CHARSET_INFO *fromcs, CHARSET_INFO *tocs) { diff --git a/sql/sql_class.h b/sql/sql_class.h index 3ecf032db71..5cdb005b517 100644 --- a/sql/sql_class.h +++ b/sql/sql_class.h @@ -2089,7 +2089,6 @@ public: void add_changed_table(const char *key, long key_length); CHANGED_TABLE_LIST * changed_table_dup(const char *key, long key_length); int send_explain_fields(select_result *result); -#ifndef EMBEDDED_LIBRARY /** Clear the current error, if any. We do not clear is_fatal_error or is_fatal_sub_stmt_error since we @@ -2105,9 +2104,9 @@ public: is_slave_error= 0; DBUG_VOID_RETURN; } +#ifndef EMBEDDED_LIBRARY inline bool vio_ok() const { return net.vio != 0; } #else - void clear_error(); inline bool vio_ok() const { return true; } #endif /** From 247262347e00b1fa3e827b174b765564d6be3b1a Mon Sep 17 00:00:00 2001 From: Evgeny Potemkin Date: Thu, 28 Jun 2012 16:53:45 +0400 Subject: [PATCH 059/164] Bug#14248833: UPDATE ON INNODB TABLE ENTERS RECURSION Introduction of cost based decision on filesort vs index for UPDATE statements changed detection of the fact that the index used to scan the table is being updated. The new design missed the case of index merge when there is no single index to check. That was worked until a recent change in InnoDB after which it went into infinite recursion if update of the used index wasn't properly detected. The fix consists of 'used key being updated' detection code from 5.1. sql/sql_update.cc: Bug#14248833: UPDATE ON INNODB TABLE ENTERS RECURSION The check for used key being updated is extended to cover the case when index merge is used. --- sql/sql_update.cc | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/sql/sql_update.cc b/sql/sql_update.cc index 754170e4c55..c4a95edcfc2 100644 --- a/sql/sql_update.cc +++ b/sql/sql_update.cc @@ -450,6 +450,15 @@ int mysql_update(THD *thd, { // Check if we are modifying a key that we are used to search with: used_key_is_modified= is_key_used(table, used_index, table->write_set); } + else if (select && select->quick) + { + /* + select->quick != NULL and used_index == MAX_KEY happens for index + merge and should be handled in a different way. + */ + used_key_is_modified= (!select->quick->unique_key_range() && + select->quick->is_keys_used(table->write_set)); + } #ifdef WITH_PARTITION_STORAGE_ENGINE if (used_key_is_modified || order || From 107c894a540d147338ab4e737eb9ef76e49c3493 Mon Sep 17 00:00:00 2001 From: Georgi Kodinov Date: Thu, 28 Jun 2012 18:38:55 +0300 Subject: [PATCH 060/164] Bug #13708485: malformed resultset packet crashes client Several fixes : * sql-common/client.c Added a validity check of the fields metadata packet sent by the server. Now libmysql will check if the length of the data sent by the server matches what's expected by the protocol before using the data. * client/mysqltest.cc Fixed the error handling code in mysqltest to avoid sending new commands when the reading the result set failed (and there are unread data in the pipe). * sql_common.h + libmysql/libmysql.c + sql-common/client.c unpack_fields() now generates a proper error when it fails. Added a new argument to this function to support the error generation. * sql/protocol.cc Added a debug trigger to cause the server to send a NULL insted of the packet expected by the client for testing purposes. --- client/mysqltest.cc | 4 +++- include/sql_common.h | 8 +++++--- libmysql/libmysql.c | 8 ++++---- sql-common/client.c | 15 ++++++++++++--- sql/protocol.cc | 4 +++- 5 files changed, 27 insertions(+), 12 deletions(-) diff --git a/client/mysqltest.cc b/client/mysqltest.cc index 593bb8ea290..e595493ccf0 100644 --- a/client/mysqltest.cc +++ b/client/mysqltest.cc @@ -1,5 +1,5 @@ /* - Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved. + Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -6848,6 +6848,8 @@ void run_query_normal(struct st_connection *cn, struct st_command *command, */ if ((counter==0) && mysql_read_query_result(mysql)) { + /* we've failed to collect the result set */ + cn->pending= TRUE; handle_error(command, mysql_errno(mysql), mysql_error(mysql), mysql_sqlstate(mysql), ds); goto end; diff --git a/include/sql_common.h b/include/sql_common.h index 9e43d076ba9..b64277ce7e1 100644 --- a/include/sql_common.h +++ b/include/sql_common.h @@ -1,4 +1,5 @@ -/* Copyright (C) 2003-2004, 2006 MySQL AB +/* + Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -23,8 +24,9 @@ extern "C" { #endif extern CHARSET_INFO *default_client_charset_info; -MYSQL_FIELD *unpack_fields(MYSQL_DATA *data,MEM_ROOT *alloc,uint fields, - my_bool default_value, uint server_capabilities); +MYSQL_FIELD *unpack_fields(MYSQL *mysql, MYSQL_DATA *data,MEM_ROOT *alloc, + uint fields, my_bool default_value, + uint server_capabilities); void free_rows(MYSQL_DATA *cur); void free_old_query(MYSQL *mysql); void end_server(MYSQL *mysql); diff --git a/libmysql/libmysql.c b/libmysql/libmysql.c index 562da594fea..5d153317150 100644 --- a/libmysql/libmysql.c +++ b/libmysql/libmysql.c @@ -1,4 +1,4 @@ -/* Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved. +/* Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -1254,7 +1254,7 @@ MYSQL_FIELD *cli_list_fields(MYSQL *mysql) return NULL; mysql->field_count= (uint) query->rows; - return unpack_fields(query,&mysql->field_alloc, + return unpack_fields(mysql, query,&mysql->field_alloc, mysql->field_count, 1, mysql->server_capabilities); } @@ -1314,7 +1314,7 @@ mysql_list_processes(MYSQL *mysql) if (!(fields = (*mysql->methods->read_rows)(mysql,(MYSQL_FIELD*) 0, protocol_41(mysql) ? 7 : 5))) DBUG_RETURN(NULL); - if (!(mysql->fields=unpack_fields(fields,&mysql->field_alloc,field_count,0, + if (!(mysql->fields=unpack_fields(mysql, fields,&mysql->field_alloc,field_count,0, mysql->server_capabilities))) DBUG_RETURN(0); mysql->status=MYSQL_STATUS_GET_RESULT; @@ -1891,7 +1891,7 @@ my_bool cli_read_prepare_result(MYSQL *mysql, MYSQL_STMT *stmt) if (!(fields_data= (*mysql->methods->read_rows)(mysql,(MYSQL_FIELD*)0,7))) DBUG_RETURN(1); - if (!(stmt->fields= unpack_fields(fields_data,&stmt->mem_root, + if (!(stmt->fields= unpack_fields(mysql, fields_data,&stmt->mem_root, field_count,0, mysql->server_capabilities))) DBUG_RETURN(1); diff --git a/sql-common/client.c b/sql-common/client.c index 0df7c242969..51911d913c7 100644 --- a/sql-common/client.c +++ b/sql-common/client.c @@ -1,5 +1,5 @@ /* - Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. + Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -1268,7 +1268,7 @@ static void cli_fetch_lengths(ulong *to, MYSQL_ROW column, ***************************************************************************/ MYSQL_FIELD * -unpack_fields(MYSQL_DATA *data,MEM_ROOT *alloc,uint fields, +unpack_fields(MYSQL *mysql, MYSQL_DATA *data,MEM_ROOT *alloc,uint fields, my_bool default_value, uint server_capabilities) { MYSQL_ROWS *row; @@ -1281,6 +1281,7 @@ unpack_fields(MYSQL_DATA *data,MEM_ROOT *alloc,uint fields, if (!result) { free_rows(data); /* Free old data */ + set_mysql_error(mysql, CR_OUT_OF_MEMORY, unknown_sqlstate); DBUG_RETURN(0); } bzero((char*) field, (uint) sizeof(MYSQL_FIELD)*fields); @@ -1308,6 +1309,14 @@ unpack_fields(MYSQL_DATA *data,MEM_ROOT *alloc,uint fields, field->org_name_length= lengths[5]; /* Unpack fixed length parts */ + if (lengths[6] != 12) + { + /* malformed packet. signal an error. */ + free_rows(data); /* Free old data */ + set_mysql_error(mysql, CR_MALFORMED_PACKET, unknown_sqlstate); + DBUG_RETURN(0); + } + pos= (uchar*) row->data[6]; field->charsetnr= uint2korr(pos); field->length= (uint) uint4korr(pos+2); @@ -2868,7 +2877,7 @@ get_info: if (!(fields=cli_read_rows(mysql,(MYSQL_FIELD*)0, protocol_41(mysql) ? 7:5))) DBUG_RETURN(1); - if (!(mysql->fields=unpack_fields(fields,&mysql->field_alloc, + if (!(mysql->fields=unpack_fields(mysql, fields,&mysql->field_alloc, (uint) field_count,0, mysql->server_capabilities))) DBUG_RETURN(1); diff --git a/sql/protocol.cc b/sql/protocol.cc index 5a727d94c46..a74f6084df4 100644 --- a/sql/protocol.cc +++ b/sql/protocol.cc @@ -1,4 +1,4 @@ -/* Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved. +/* Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -620,6 +620,8 @@ bool Protocol::send_fields(List *list, uint flags) /* Store fixed length fields */ pos= (char*) local_packet->ptr()+local_packet->length(); *pos++= 12; // Length of packed fields + /* inject a NULL to test the client */ + DBUG_EXECUTE_IF("poison_rs_fields", pos[-1]= 0xfb;); if (item->collation.collation == &my_charset_bin || thd_charset == NULL) { /* No conversion */ From 59c79cc5d0f1dab2db65f3d55ffe6a5a777b85c1 Mon Sep 17 00:00:00 2001 From: Joerg Bruehe Date: Thu, 28 Jun 2012 20:03:53 +0200 Subject: [PATCH 061/164] Bug#65745: UPDATE ON INNODB TABLE ENTERS RECURSION Introduction of cost based decision on filesort vs index for UPDATE statements changed detection of the fact that the index used to scan the table is being updated. The new design missed the case of index merge when there is no single index to check. That was worked until a recent change in InnoDB after which it went into infinite recursion if update of the used index wasn't properly detected. The fix consists of 'used key being updated' detection code from 5.1. Patch done by Evgeny Potemkin and transferred into the 5.5.25a release build by Joerg Bruehe. This changeset is the difference between MySQL 5.5.25 and 5.5.25a. VERSION: Version number change. sql/sql_update.cc: Bug#65745: UPDATE ON INNODB TABLE ENTERS RECURSION The check for used key being updated is extended to cover the case when index merge is used. --- VERSION | 2 +- sql/sql_update.cc | 9 +++++++++ 2 files changed, 10 insertions(+), 1 deletion(-) diff --git a/VERSION b/VERSION index 6111f6d453f..48e6c183915 100644 --- a/VERSION +++ b/VERSION @@ -1,4 +1,4 @@ MYSQL_VERSION_MAJOR=5 MYSQL_VERSION_MINOR=5 -MYSQL_VERSION_PATCH=25 +MYSQL_VERSION_PATCH=25a MYSQL_VERSION_EXTRA= diff --git a/sql/sql_update.cc b/sql/sql_update.cc index 754170e4c55..c4a95edcfc2 100644 --- a/sql/sql_update.cc +++ b/sql/sql_update.cc @@ -450,6 +450,15 @@ int mysql_update(THD *thd, { // Check if we are modifying a key that we are used to search with: used_key_is_modified= is_key_used(table, used_index, table->write_set); } + else if (select && select->quick) + { + /* + select->quick != NULL and used_index == MAX_KEY happens for index + merge and should be handled in a different way. + */ + used_key_is_modified= (!select->quick->unique_key_range() && + select->quick->is_keys_used(table->write_set)); + } #ifdef WITH_PARTITION_STORAGE_ENGINE if (used_key_is_modified || order || From 6058319dba910576e00b0b566697b95aff6cb52c Mon Sep 17 00:00:00 2001 From: Yasufumi Kinoshita Date: Fri, 29 Jun 2012 12:04:44 +0900 Subject: [PATCH 062/164] Bug#14251529 : FIX FOR BUG 13704145 CREATES POSSIBLE RACE CONDITION make buf_read_page_low() to treat DB_TABLESPACE_DELETED error correctly rb#1129 approved by Inaam --- storage/innobase/buf/buf0buf.c | 9 ++++-- storage/innobase/buf/buf0lru.c | 14 +++++++++ storage/innobase/buf/buf0rea.c | 48 +++++++++++++++++++++++++++++- storage/innobase/include/buf0buf.h | 5 ++-- 4 files changed, 70 insertions(+), 6 deletions(-) diff --git a/storage/innobase/buf/buf0buf.c b/storage/innobase/buf/buf0buf.c index fed07129b65..32d376136e6 100644 --- a/storage/innobase/buf/buf0buf.c +++ b/storage/innobase/buf/buf0buf.c @@ -3470,9 +3470,10 @@ buf_mark_space_corrupt( /********************************************************************//** Completes an asynchronous read or write request of a file page to or from -the buffer pool. */ +the buffer pool. +@return TRUE if successful */ UNIV_INTERN -void +ibool buf_page_io_complete( /*=================*/ buf_page_t* bpage) /*!< in: pointer to the block in question */ @@ -3599,7 +3600,7 @@ corrupt: table as corrupted instead of crashing server */ if (bpage->space > TRX_SYS_SPACE && buf_mark_space_corrupt(bpage)) { - return; + return(FALSE); } else { fputs("InnoDB: Ending processing" " because of" @@ -3689,6 +3690,8 @@ corrupt: mutex_exit(buf_page_get_mutex(bpage)); buf_pool_mutex_exit(buf_pool); + + return(TRUE); } /*********************************************************************//** diff --git a/storage/innobase/buf/buf0lru.c b/storage/innobase/buf/buf0lru.c index 8e787fdba17..7c8100df58e 100644 --- a/storage/innobase/buf/buf0lru.c +++ b/storage/innobase/buf/buf0lru.c @@ -2164,9 +2164,23 @@ buf_LRU_free_one_page( be in a state where it can be freed; there may or may not be a hash index to the page */ { +#ifdef UNIV_DEBUG + buf_pool_t* buf_pool = buf_pool_from_bpage(bpage); +#endif + mutex_t* block_mutex = buf_page_get_mutex(bpage); + + ut_ad(buf_pool_mutex_own(buf_pool)); + ut_ad(mutex_own(block_mutex)); + if (buf_LRU_block_remove_hashed_page(bpage, TRUE) != BUF_BLOCK_ZIP_FREE) { buf_LRU_block_free_hashed_page((buf_block_t*) bpage); + } else { + /* The block_mutex should have been released by + buf_LRU_block_remove_hashed_page() when it returns + BUF_BLOCK_ZIP_FREE. */ + ut_ad(block_mutex == &buf_pool->zip_mutex); + mutex_enter(block_mutex); } } diff --git a/storage/innobase/buf/buf0rea.c b/storage/innobase/buf/buf0rea.c index da804a66b29..40550186191 100644 --- a/storage/innobase/buf/buf0rea.c +++ b/storage/innobase/buf/buf0rea.c @@ -50,6 +50,44 @@ read-ahead is not done: this is to prevent flooding the buffer pool with i/o-fixed buffer blocks */ #define BUF_READ_AHEAD_PEND_LIMIT 2 +/********************************************************************//** +Unfixes the pages, unlatches the page, +removes it from page_hash and removes it from LRU. */ +static +void +buf_read_page_handle_error( +/*=======================*/ + buf_page_t* bpage) /*!< in: pointer to the block */ +{ + buf_pool_t* buf_pool = buf_pool_from_bpage(bpage); + const ibool uncompressed = (buf_page_get_state(bpage) + == BUF_BLOCK_FILE_PAGE); + + /* First unfix and release lock on the bpage */ + buf_pool_mutex_enter(buf_pool); + mutex_enter(buf_page_get_mutex(bpage)); + ut_ad(buf_page_get_io_fix(bpage) == BUF_IO_READ); + ut_ad(bpage->buf_fix_count == 0); + + /* Set BUF_IO_NONE before we remove the block from LRU list */ + buf_page_set_io_fix(bpage, BUF_IO_NONE); + + if (uncompressed) { + rw_lock_x_unlock_gen( + &((buf_block_t*) bpage)->lock, + BUF_IO_READ); + } + + /* remove the block from LRU list */ + buf_LRU_free_one_page(bpage); + + ut_ad(buf_pool->n_pend_reads > 0); + buf_pool->n_pend_reads--; + + mutex_exit(buf_page_get_mutex(bpage)); + buf_pool_mutex_exit(buf_pool); +} + /********************************************************************//** Low-level function which reads a page asynchronously from a file to the buffer buf_pool if it is not already there, in which case does nothing. @@ -152,12 +190,20 @@ buf_read_page_low( ((buf_block_t*) bpage)->frame, bpage); } thd_wait_end(NULL); + + if (*err == DB_TABLESPACE_DELETED) { + buf_read_page_handle_error(bpage); + return(0); + } + ut_a(*err == DB_SUCCESS); if (sync) { /* The i/o is already completed when we arrive from fil_read */ - buf_page_io_complete(bpage); + if (!buf_page_io_complete(bpage)) { + return(0); + } } return(1); diff --git a/storage/innobase/include/buf0buf.h b/storage/innobase/include/buf0buf.h index 7c81fe0c539..a39592943d8 100644 --- a/storage/innobase/include/buf0buf.h +++ b/storage/innobase/include/buf0buf.h @@ -1162,9 +1162,10 @@ buf_page_init_for_read( ulint offset);/*!< in: page number */ /********************************************************************//** Completes an asynchronous read or write request of a file page to or from -the buffer pool. */ +the buffer pool. +@return TRUE if successful */ UNIV_INTERN -void +ibool buf_page_io_complete( /*=================*/ buf_page_t* bpage); /*!< in: pointer to the block in question */ From 767501fb54f19adf3c136e5131daf11e34b3f039 Mon Sep 17 00:00:00 2001 From: Gleb Shchepa Date: Fri, 29 Jun 2012 12:55:45 +0400 Subject: [PATCH 063/164] Backport of the deprecation warning from WL#6219: "Deprecate and remove YEAR(2) type" Print the warning(note): YEAR(x) is deprecated and will be removed in a future release. Please use YEAR(4) instead on "CREATE TABLE ... YEAR(x)" or "ALTER TABLE MODIFY ... YEAR(x)", where x != 4 --- mysql-test/r/func_group.result | 2 ++ mysql-test/r/type_blob.result | 4 ++++ mysql-test/r/type_year.result | 15 +++++++++++++++ .../suite/engines/iuds/r/delete_year.result | 6 ++++++ .../suite/engines/iuds/r/insert_year.result | 12 ++++++++++++ .../suite/engines/iuds/r/update_year.result | 6 ++++++ mysql-test/suite/funcs_1/r/innodb_views.result | 4 ++++ .../suite/funcs_1/r/is_columns_innodb.result | 6 ++++++ .../suite/funcs_1/r/is_columns_memory.result | 6 ++++++ .../suite/funcs_1/r/is_columns_myisam.result | 6 ++++++ .../r/is_columns_myisam_embedded.result | 6 ++++++ mysql-test/suite/funcs_1/r/memory_views.result | 4 ++++ .../suite/funcs_1/r/myisam_views-big.result | 4 ++++ mysql-test/suite/funcs_1/r/ndb_views.result | 4 ++++ mysql-test/suite/funcs_1/r/storedproc.result | 4 ++++ .../innodb_plugin/r/innodb_bug52745.result | 1 + mysql-test/t/type_year.test | 8 ++++++++ sql/field.cc | 11 +++++++++++ sql/sql_yacc.yy | 18 +++++++++++++++++- 19 files changed, 126 insertions(+), 1 deletion(-) diff --git a/mysql-test/r/func_group.result b/mysql-test/r/func_group.result index b90eb2a4c0f..74899a22636 100644 --- a/mysql-test/r/func_group.result +++ b/mysql-test/r/func_group.result @@ -1524,6 +1524,8 @@ DROP TABLE t1; # Bug#43668: Wrong comparison and MIN/MAX for YEAR(2) # create table t1 (f1 year(2), f2 year(4), f3 date, f4 datetime); +Warnings: +Note 1287 'YEAR(2)' is deprecated and will be removed in a future release. Please use YEAR(4) instead insert into t1 values (98,1998,19980101,"1998-01-01 00:00:00"), (00,2000,20000101,"2000-01-01 00:00:01"), diff --git a/mysql-test/r/type_blob.result b/mysql-test/r/type_blob.result index e6fd49b4247..8b4b6438842 100644 --- a/mysql-test/r/type_blob.result +++ b/mysql-test/r/type_blob.result @@ -878,6 +878,8 @@ ERROR 42000: Column length too big for column 'a' (max = 255); use BLOB or TEXT CREATE TABLE b15776 (a char(4294967296)); ERROR 42000: Display width out of range for column 'a' (max = 4294967295) CREATE TABLE b15776 (a year(4294967295)); +Warnings: +Note 1287 'YEAR(4294967295)' is deprecated and will be removed in a future release. Please use YEAR(4) instead INSERT INTO b15776 VALUES (42); SELECT * FROM b15776; a @@ -886,6 +888,8 @@ DROP TABLE b15776; CREATE TABLE b15776 (a year(4294967296)); ERROR 42000: Display width out of range for column 'a' (max = 4294967295) CREATE TABLE b15776 (a year(0)); +Warnings: +Note 1287 'YEAR(0)' is deprecated and will be removed in a future release. Please use YEAR(4) instead DROP TABLE b15776; CREATE TABLE b15776 (a year(-2)); ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '-2))' at line 1 diff --git a/mysql-test/r/type_year.result b/mysql-test/r/type_year.result index 2dc491c6166..e00569c93c1 100644 --- a/mysql-test/r/type_year.result +++ b/mysql-test/r/type_year.result @@ -1,5 +1,7 @@ drop table if exists t1; create table t1 (y year,y2 year(2)); +Warnings: +Note 1287 'YEAR(2)' is deprecated and will be removed in a future release. Please use YEAR(4) instead insert into t1 values (0,0),(1999,1999),(2000,2000),(2001,2001),(70,70),(69,69); select * from t1; y y2 @@ -50,6 +52,8 @@ End of 5.0 tests # Bug #49480: WHERE using YEAR columns returns unexpected results # CREATE TABLE t2(yy YEAR(2), c2 CHAR(4)); +Warnings: +Note 1287 'YEAR(2)' is deprecated and will be removed in a future release. Please use YEAR(4) instead CREATE TABLE t4(yyyy YEAR(4), c4 CHAR(4)); INSERT INTO t2 (c2) VALUES (NULL),(1970),(1999),(2000),(2001),(2069); INSERT INTO t4 (c4) SELECT c2 FROM t2; @@ -355,4 +359,15 @@ total_rows min_value MAX(c1) 3 0 2155 DROP TABLE t1; # +# WL#6219: Deprecate and remove YEAR(2) type +# +CREATE TABLE t1 (c1 YEAR(2), c2 YEAR(4)); +Warnings: +Note 1287 'YEAR(2)' is deprecated and will be removed in a future release. Please use YEAR(4) instead +ALTER TABLE t1 MODIFY COLUMN c2 YEAR(2); +Warnings: +Note 1287 'YEAR(2)' is deprecated and will be removed in a future release. Please use YEAR(4) instead +Note 1287 'YEAR(2)' is deprecated and will be removed in a future release. Please use YEAR(4) instead +DROP TABLE t1; +# End of 5.1 tests diff --git a/mysql-test/suite/engines/iuds/r/delete_year.result b/mysql-test/suite/engines/iuds/r/delete_year.result index 02cbe24ecc9..c82f0dae7d9 100644 --- a/mysql-test/suite/engines/iuds/r/delete_year.result +++ b/mysql-test/suite/engines/iuds/r/delete_year.result @@ -2,7 +2,13 @@ DROP TABLE IF EXISTS t1,t2,t3,t4; CREATE TABLE t1(c1 YEAR NOT NULL,c2 YEAR, PRIMARY KEY(c1)); CREATE TABLE t2(c1 YEAR NOT NULL, c2 YEAR, UNIQUE INDEX idx(c1,c2)); CREATE TABLE t3(c1 YEAR(2) NOT NULL,c2 YEAR(2), PRIMARY KEY(c1)); +Warnings: +Note 1287 'YEAR(2)' is deprecated and will be removed in a future release. Please use YEAR(4) instead +Note 1287 'YEAR(2)' is deprecated and will be removed in a future release. Please use YEAR(4) instead CREATE TABLE t4(c1 YEAR(2), c2 YEAR(2), UNIQUE INDEX idx(c1,c2)); +Warnings: +Note 1287 'YEAR(2)' is deprecated and will be removed in a future release. Please use YEAR(4) instead +Note 1287 'YEAR(2)' is deprecated and will be removed in a future release. Please use YEAR(4) instead INSERT INTO t1 VALUES (1901,1901),(1970,1970),(1999,1999),(2000,2000),(2155,2155); INSERT INTO t2 VALUES (1901,1901),(1970,1970),(1999,1999),(2000,2000),(2155,2155); INSERT INTO t3 VALUES (1901,1901),(1970,1970),(1999,1999),(2000,2000),(2155,2155); diff --git a/mysql-test/suite/engines/iuds/r/insert_year.result b/mysql-test/suite/engines/iuds/r/insert_year.result index 386c8090434..b9618ba4e2d 100644 --- a/mysql-test/suite/engines/iuds/r/insert_year.result +++ b/mysql-test/suite/engines/iuds/r/insert_year.result @@ -3235,9 +3235,21 @@ c1 c2 c3 c4 1999 1999 1998-12-30 1998-12-30 11:30:45 DROP TABLE t1,t2,t3,t4; CREATE TABLE t1(c1 YEAR(2) NOT NULL, c2 YEAR(2) NULL, c3 DATE, c4 DATETIME, PRIMARY KEY(c1), UNIQUE INDEX(c2)); +Warnings: +Note 1287 'YEAR(2)' is deprecated and will be removed in a future release. Please use YEAR(4) instead +Note 1287 'YEAR(2)' is deprecated and will be removed in a future release. Please use YEAR(4) instead CREATE TABLE t2(c1 YEAR(2) NOT NULL, c2 YEAR(2) NULL, c3 DATE, c4 DATETIME, PRIMARY KEY(c1,c2)); +Warnings: +Note 1287 'YEAR(2)' is deprecated and will be removed in a future release. Please use YEAR(4) instead +Note 1287 'YEAR(2)' is deprecated and will be removed in a future release. Please use YEAR(4) instead CREATE TABLE t3(c1 YEAR(2) NOT NULL, c2 YEAR(2) NULL, c3 DATE, c4 DATETIME, UNIQUE INDEX idx(c1,c2)); +Warnings: +Note 1287 'YEAR(2)' is deprecated and will be removed in a future release. Please use YEAR(4) instead +Note 1287 'YEAR(2)' is deprecated and will be removed in a future release. Please use YEAR(4) instead CREATE TABLE t4(c1 YEAR(2) NOT NULL, c2 YEAR(2) NULL, c3 DATE, c4 DATETIME); +Warnings: +Note 1287 'YEAR(2)' is deprecated and will be removed in a future release. Please use YEAR(4) instead +Note 1287 'YEAR(2)' is deprecated and will be removed in a future release. Please use YEAR(4) instead INSERT INTO t1 VALUES('1901','1901','98-12-31','98.12.31 11:30:45'),('1999','1999','98-12-30','98.12.30 11:30:45'),('2000','2000','98-12-29','98.12.29 11:30:45'),('2001','2001','98-12-28','98.12.28 11:30:45'),('2099','2099','98-12-27','98.12.27 11:30:45'),('2100','2100','98-12-26','98.12.26 11:30:45'),('2155','2155','98-12-26','98.12.26 11:30:45'); INSERT INTO t2 VALUES('1901','1901','98-12-31','98.12.31 11:30:45'),('1999','1999','98-12-30','98.12.30 11:30:45'),('2000','2000','98-12-29','98.12.29 11:30:45'),('2001','2001','98-12-28','98.12.28 11:30:45'),('2099','2099','98-12-27','98.12.27 11:30:45'),('2100','2100','98-12-26','98.12.26 11:30:45'),('2155','2155','98-12-26','98.12.26 11:30:45'); INSERT INTO t3 VALUES('1901','1901','98-12-31','98.12.31 11:30:45'),('1999','1999','98-12-30','98.12.30 11:30:45'),('2000','2000','98-12-29','98.12.29 11:30:45'),('2001','2001','98-12-28','98.12.28 11:30:45'),('2099','2099','98-12-27','98.12.27 11:30:45'),('2100','2100','98-12-26','98.12.26 11:30:45'),('2155','2155','98-12-26','98.12.26 11:30:45'); diff --git a/mysql-test/suite/engines/iuds/r/update_year.result b/mysql-test/suite/engines/iuds/r/update_year.result index 1b0ead45314..c762d70a276 100644 --- a/mysql-test/suite/engines/iuds/r/update_year.result +++ b/mysql-test/suite/engines/iuds/r/update_year.result @@ -2,7 +2,13 @@ DROP TABLE IF EXISTS t1,t2,t3,t4; CREATE TABLE t1(c1 YEAR NOT NULL,c2 YEAR, PRIMARY KEY(c1)); CREATE TABLE t2(c1 YEAR NOT NULL, c2 YEAR, UNIQUE INDEX idx(c1,c2)); CREATE TABLE t3(c1 YEAR(2) NOT NULL,c2 YEAR(2), PRIMARY KEY(c1)); +Warnings: +Note 1287 'YEAR(2)' is deprecated and will be removed in a future release. Please use YEAR(4) instead +Note 1287 'YEAR(2)' is deprecated and will be removed in a future release. Please use YEAR(4) instead CREATE TABLE t4(c1 YEAR(2), c2 YEAR(2), UNIQUE INDEX idx(c1,c2)); +Warnings: +Note 1287 'YEAR(2)' is deprecated and will be removed in a future release. Please use YEAR(4) instead +Note 1287 'YEAR(2)' is deprecated and will be removed in a future release. Please use YEAR(4) instead INSERT INTO t1 VALUES (1901,1901),(1970,1970),(1999,1999),(2000,2000),(2155,2155); INSERT INTO t2 VALUES (1901,1901),(1970,1970),(1999,1999),(2000,2000),(2155,2155); INSERT INTO t3 VALUES (1901,1901),(1970,1970),(1999,1999),(2000,2000),(2155,2155); diff --git a/mysql-test/suite/funcs_1/r/innodb_views.result b/mysql-test/suite/funcs_1/r/innodb_views.result index a335e135a4f..951068e3300 100644 --- a/mysql-test/suite/funcs_1/r/innodb_views.result +++ b/mysql-test/suite/funcs_1/r/innodb_views.result @@ -53,6 +53,8 @@ f107 year(4) not null default 2000, f108 enum("1enum","2enum") not null default "1enum", f109 set("1set","2set") not null default "1set" ) engine = innodb; +Warnings: +Note 1287 'YEAR(3)' is deprecated and will be removed in a future release. Please use YEAR(4) instead load data infile '/std_data/funcs_1/innodb_tb2.txt' into table tb2; DROP DATABASE IF EXISTS test1; @@ -112,6 +114,8 @@ f107 year(4) not null default 2000, f108 enum("1enum","2enum") not null default "1enum", f109 set("1set","2set") not null default "1set" ) engine = innodb; +Warnings: +Note 1287 'YEAR(3)' is deprecated and will be removed in a future release. Please use YEAR(4) instead load data infile '/std_data/funcs_1/innodb_tb2.txt' into table tb2; USE test; diff --git a/mysql-test/suite/funcs_1/r/is_columns_innodb.result b/mysql-test/suite/funcs_1/r/is_columns_innodb.result index 61079b06666..0abe8e11cf3 100644 --- a/mysql-test/suite/funcs_1/r/is_columns_innodb.result +++ b/mysql-test/suite/funcs_1/r/is_columns_innodb.result @@ -132,6 +132,8 @@ f107 year(4) not null default 2000, f108 enum("1enum","2enum") not null default "1enum", f109 set("1set","2set") not null default "1set" ) engine = innodb; +Warnings: +Note 1287 'YEAR(3)' is deprecated and will be removed in a future release. Please use YEAR(4) instead load data infile '/std_data/funcs_1/innodb_tb2.txt' into table tb2; drop table if exists tb3 ; @@ -262,6 +264,8 @@ f239 varchar(20000) binary, f240 varchar(2000), f241 char(100) ) engine = innodb; +Warnings: +Note 1287 'YEAR(3)' is deprecated and will be removed in a future release. Please use YEAR(4) instead load data infile '/std_data/funcs_1/innodb_tb4.txt' into table tb4; USE test1; @@ -319,6 +323,8 @@ f107 year(4) not null default 2000, f108 enum("1enum","2enum") not null default "1enum", f109 set("1set","2set") not null default "1set" ) engine = innodb; +Warnings: +Note 1287 'YEAR(3)' is deprecated and will be removed in a future release. Please use YEAR(4) instead load data infile '/std_data/funcs_1/innodb_tb2.txt' into table tb2; USE test; diff --git a/mysql-test/suite/funcs_1/r/is_columns_memory.result b/mysql-test/suite/funcs_1/r/is_columns_memory.result index 60dea25e0e3..c476b930f60 100644 --- a/mysql-test/suite/funcs_1/r/is_columns_memory.result +++ b/mysql-test/suite/funcs_1/r/is_columns_memory.result @@ -128,6 +128,8 @@ f107 year(4) not null default 2000, f108 enum("1enum","2enum") not null default "1enum", f109 set("1set","2set") not null default "1set" ) engine = memory; +Warnings: +Note 1287 'YEAR(3)' is deprecated and will be removed in a future release. Please use YEAR(4) instead load data infile '/std_data/funcs_1/memory_tb2.txt' into table tb2 ; drop table if exists tb3; @@ -251,6 +253,8 @@ f238 varchar(25000) binary, f239 varbinary(0), f240 varchar(1200) ) engine = memory; +Warnings: +Note 1287 'YEAR(3)' is deprecated and will be removed in a future release. Please use YEAR(4) instead load data infile '/std_data/funcs_1/memory_tb4.txt' into table tb4; USE test1; @@ -308,6 +312,8 @@ f107 year(4) not null default 2000, f108 enum("1enum","2enum") not null default "1enum", f109 set("1set","2set") not null default "1set" ) engine = memory; +Warnings: +Note 1287 'YEAR(3)' is deprecated and will be removed in a future release. Please use YEAR(4) instead load data infile '/std_data/funcs_1/memory_tb2.txt' into table tb2 ; USE test; diff --git a/mysql-test/suite/funcs_1/r/is_columns_myisam.result b/mysql-test/suite/funcs_1/r/is_columns_myisam.result index 6d0a44d2223..0e464d0fbc1 100644 --- a/mysql-test/suite/funcs_1/r/is_columns_myisam.result +++ b/mysql-test/suite/funcs_1/r/is_columns_myisam.result @@ -144,6 +144,8 @@ f115 VARBINARY(27) null , f116 VARBINARY(64) null, f117 VARBINARY(192) null ) engine = myisam; +Warnings: +Note 1287 'YEAR(3)' is deprecated and will be removed in a future release. Please use YEAR(4) instead load data infile '/std_data/funcs_1/myisam_tb2.txt' into table tb2; drop table if exists tb3 ; @@ -283,6 +285,8 @@ f240 varchar(120), f241 char(100), f242 bit(30) ) engine = myisam; +Warnings: +Note 1287 'YEAR(3)' is deprecated and will be removed in a future release. Please use YEAR(4) instead load data infile '/std_data/funcs_1/myisam_tb4.txt' into table tb4; USE test1; @@ -348,6 +352,8 @@ f115 VARBINARY(27) null , f116 VARBINARY(64) null, f117 VARBINARY(192) null ) engine = myisam; +Warnings: +Note 1287 'YEAR(3)' is deprecated and will be removed in a future release. Please use YEAR(4) instead load data infile '/std_data/funcs_1/myisam_tb2.txt' into table tb2; USE test; diff --git a/mysql-test/suite/funcs_1/r/is_columns_myisam_embedded.result b/mysql-test/suite/funcs_1/r/is_columns_myisam_embedded.result index 739f62e371a..7424ba8573d 100644 --- a/mysql-test/suite/funcs_1/r/is_columns_myisam_embedded.result +++ b/mysql-test/suite/funcs_1/r/is_columns_myisam_embedded.result @@ -144,6 +144,8 @@ f115 VARBINARY(27) null , f116 VARBINARY(64) null, f117 VARBINARY(192) null ) engine = myisam; +Warnings: +Note 1287 'YEAR(3)' is deprecated and will be removed in a future release. Please use YEAR(4) instead load data infile '/std_data/funcs_1/myisam_tb2.txt' into table tb2; drop table if exists tb3 ; @@ -283,6 +285,8 @@ f240 varchar(120), f241 char(100), f242 bit(30) ) engine = myisam; +Warnings: +Note 1287 'YEAR(3)' is deprecated and will be removed in a future release. Please use YEAR(4) instead load data infile '/std_data/funcs_1/myisam_tb4.txt' into table tb4; USE test1; @@ -348,6 +352,8 @@ f115 VARBINARY(27) null , f116 VARBINARY(64) null, f117 VARBINARY(192) null ) engine = myisam; +Warnings: +Note 1287 'YEAR(3)' is deprecated and will be removed in a future release. Please use YEAR(4) instead load data infile '/std_data/funcs_1/myisam_tb2.txt' into table tb2; USE test; diff --git a/mysql-test/suite/funcs_1/r/memory_views.result b/mysql-test/suite/funcs_1/r/memory_views.result index ccbd086b71f..0bb03e62192 100644 --- a/mysql-test/suite/funcs_1/r/memory_views.result +++ b/mysql-test/suite/funcs_1/r/memory_views.result @@ -54,6 +54,8 @@ f107 year(4) not null default 2000, f108 enum("1enum","2enum") not null default "1enum", f109 set("1set","2set") not null default "1set" ) engine = memory; +Warnings: +Note 1287 'YEAR(3)' is deprecated and will be removed in a future release. Please use YEAR(4) instead load data infile '/std_data/funcs_1/memory_tb2.txt' into table tb2 ; DROP DATABASE IF EXISTS test1; @@ -113,6 +115,8 @@ f107 year(4) not null default 2000, f108 enum("1enum","2enum") not null default "1enum", f109 set("1set","2set") not null default "1set" ) engine = memory; +Warnings: +Note 1287 'YEAR(3)' is deprecated and will be removed in a future release. Please use YEAR(4) instead load data infile '/std_data/funcs_1/memory_tb2.txt' into table tb2 ; USE test; diff --git a/mysql-test/suite/funcs_1/r/myisam_views-big.result b/mysql-test/suite/funcs_1/r/myisam_views-big.result index 9b07a0ae45b..0afb1d7d6c8 100644 --- a/mysql-test/suite/funcs_1/r/myisam_views-big.result +++ b/mysql-test/suite/funcs_1/r/myisam_views-big.result @@ -62,6 +62,8 @@ f115 VARBINARY(27) null , f116 VARBINARY(64) null, f117 VARBINARY(192) null ) engine = myisam; +Warnings: +Note 1287 'YEAR(3)' is deprecated and will be removed in a future release. Please use YEAR(4) instead load data infile '/std_data/funcs_1/myisam_tb2.txt' into table tb2; DROP DATABASE IF EXISTS test1; @@ -129,6 +131,8 @@ f115 VARBINARY(27) null , f116 VARBINARY(64) null, f117 VARBINARY(192) null ) engine = myisam; +Warnings: +Note 1287 'YEAR(3)' is deprecated and will be removed in a future release. Please use YEAR(4) instead load data infile '/std_data/funcs_1/myisam_tb2.txt' into table tb2; USE test; diff --git a/mysql-test/suite/funcs_1/r/ndb_views.result b/mysql-test/suite/funcs_1/r/ndb_views.result index b75f4955986..17eaedce56b 100644 --- a/mysql-test/suite/funcs_1/r/ndb_views.result +++ b/mysql-test/suite/funcs_1/r/ndb_views.result @@ -53,6 +53,8 @@ f107 year(4) not null default 2000, f108 enum("1enum","2enum") not null default "1enum", f109 set("1set","2set") not null default "1set" ) engine = ndb; +Warnings: +Note 1287 'YEAR(3)' is deprecated and will be removed in a future release. Please use YEAR(4) instead load data infile '/std_data/funcs_1/ndb_tb2.txt' into table tb2 ; DROP DATABASE IF EXISTS test1; @@ -112,6 +114,8 @@ f107 year(4) not null default 2000, f108 enum("1enum","2enum") not null default "1enum", f109 set("1set","2set") not null default "1set" ) engine = ndb; +Warnings: +Note 1287 'YEAR(3)' is deprecated and will be removed in a future release. Please use YEAR(4) instead load data infile '/std_data/funcs_1/ndb_tb2.txt' into table tb2 ; USE test; diff --git a/mysql-test/suite/funcs_1/r/storedproc.result b/mysql-test/suite/funcs_1/r/storedproc.result index 8da7213bded..7647579820a 100644 --- a/mysql-test/suite/funcs_1/r/storedproc.result +++ b/mysql-test/suite/funcs_1/r/storedproc.result @@ -7526,9 +7526,13 @@ BEGIN declare x, y, z year(3) default 2005; SELECT x, y, z; END// +Warnings: +Note 1287 'YEAR(3)' is deprecated and will be removed in a future release. Please use YEAR(4) instead CALL sp1(); x y z 2005 2005 2005 +Warnings: +Note 1287 'YEAR(3)' is deprecated and will be removed in a future release. Please use YEAR(4) instead DROP PROCEDURE IF EXISTS sp1; CREATE PROCEDURE sp1( ) BEGIN diff --git a/mysql-test/suite/innodb_plugin/r/innodb_bug52745.result b/mysql-test/suite/innodb_plugin/r/innodb_bug52745.result index 74db8b0c20a..927ba0e0e53 100644 --- a/mysql-test/suite/innodb_plugin/r/innodb_bug52745.result +++ b/mysql-test/suite/innodb_plugin/r/innodb_bug52745.result @@ -58,6 +58,7 @@ col89 float unsigned zerofill DEFAULT NULL, col90 tinyblob ) ENGINE=InnoDB DEFAULT CHARSET=latin1 ROW_FORMAT=COMPRESSED KEY_BLOCK_SIZE=1; Warnings: +Note 1287 'YEAR(2)' is deprecated and will be removed in a future release. Please use YEAR(4) instead Note 1291 Column 'col82' has duplicated value '' in ENUM Note 1291 Column 'col82' has duplicated value '' in ENUM INSERT INTO bug52745 SET diff --git a/mysql-test/t/type_year.test b/mysql-test/t/type_year.test index 1a9e66478e1..8ba8260cfc4 100644 --- a/mysql-test/t/type_year.test +++ b/mysql-test/t/type_year.test @@ -159,6 +159,14 @@ SELECT * FROM t1; SELECT COUNT(*) AS total_rows, MIN(c1) AS min_value, MAX(c1) FROM t1; DROP TABLE t1; +--echo # +--echo # WL#6219: Deprecate and remove YEAR(2) type +--echo # + +CREATE TABLE t1 (c1 YEAR(2), c2 YEAR(4)); +ALTER TABLE t1 MODIFY COLUMN c2 YEAR(2); +DROP TABLE t1; + --echo # --echo End of 5.1 tests diff --git a/sql/field.cc b/sql/field.cc index f398642fdb0..1c937755c0c 100644 --- a/sql/field.cc +++ b/sql/field.cc @@ -10227,6 +10227,17 @@ Create_field::Create_field(Field *old_field,Field *orig_field) geom_type= ((Field_geom*)old_field)->geom_type; break; #endif + case MYSQL_TYPE_YEAR: + if (length != 4) + { + char buff[sizeof("YEAR()") + MY_INT64_NUM_DECIMAL_DIGITS + 1]; + snprintf(buff, sizeof(buff), "YEAR(%lu)", length); + push_warning_printf(current_thd, MYSQL_ERROR::WARN_LEVEL_NOTE, + ER_WARN_DEPRECATED_SYNTAX, + ER(ER_WARN_DEPRECATED_SYNTAX), + buff, "YEAR(4)"); + } + break; default: break; } diff --git a/sql/sql_yacc.yy b/sql/sql_yacc.yy index 7e7ff7e91ca..854ba432362 100644 --- a/sql/sql_yacc.yy +++ b/sql/sql_yacc.yy @@ -5034,7 +5034,23 @@ type: $$= MYSQL_TYPE_VARCHAR; } | YEAR_SYM opt_field_length field_options - { $$=MYSQL_TYPE_YEAR; } + { + if (Lex->length) + { + errno= 0; + ulong length= strtoul(Lex->length, NULL, 10); + if (errno == 0 && length <= MAX_FIELD_BLOBLENGTH && length != 4) + { + char buff[sizeof("YEAR()") + MY_INT64_NUM_DECIMAL_DIGITS + 1]; + snprintf(buff, sizeof(buff), "YEAR(%lu)", length); + push_warning_printf(YYTHD, MYSQL_ERROR::WARN_LEVEL_NOTE, + ER_WARN_DEPRECATED_SYNTAX, + ER(ER_WARN_DEPRECATED_SYNTAX), + buff, "YEAR(4)"); + } + } + $$=MYSQL_TYPE_YEAR; + } | DATE_SYM { $$=MYSQL_TYPE_DATE; } | TIME_SYM From d672a10593756b2252ca8d7340988c2ac6438cb8 Mon Sep 17 00:00:00 2001 From: Georgi Kodinov Date: Fri, 29 Jun 2012 14:04:24 +0300 Subject: [PATCH 064/164] Bug #12910665: AUTH-PLUGIN-DATA-LEN NOT TESTED FOR VALIDITY BY THE CLIENT Added a check for a negative second part of the scramble length. --- sql-common/client.c | 6 ++++++ sql/sql_acl.cc | 1 + 2 files changed, 7 insertions(+) diff --git a/sql-common/client.c b/sql-common/client.c index be24c5e89e4..ef1e3c1b7d4 100644 --- a/sql-common/client.c +++ b/sql-common/client.c @@ -3415,6 +3415,12 @@ CLI_MYSQL_REAL_CONNECT(MYSQL *mysql,const char *host, const char *user, mysql->server_status=uint2korr(end+3); mysql->server_capabilities|= uint2korr(end+5) << 16; pkt_scramble_len= end[7]; + if (pkt_scramble_len < 0) + { + set_mysql_error(mysql, CR_MALFORMED_PACKET, + unknown_sqlstate); /* purecov: inspected */ + goto error; + } } end+= 18; diff --git a/sql/sql_acl.cc b/sql/sql_acl.cc index d3715fd2312..242967fff6a 100644 --- a/sql/sql_acl.cc +++ b/sql/sql_acl.cc @@ -8032,6 +8032,7 @@ static bool send_server_handshake_packet(MPVIO_EXT *mpvio, int2store(end + 3, mpvio->server_status[0]); int2store(end + 5, mpvio->client_capabilities >> 16); end[7]= data_len; + DBUG_EXECUTE_IF("poison_srv_handshake_scramble_len", end[7]= -100;); bzero(end + 8, 10); end+= 18; /* write scramble tail */ From 1ede2dd8146254951493081f2297b0832fdd4d13 Mon Sep 17 00:00:00 2001 From: Jon Olav Hauglid Date: Fri, 29 Jun 2012 13:25:57 +0200 Subject: [PATCH 065/164] Bug#14238406 NEW COMPILATION WARNINGS WITH GCC 4.7 (-WERROR=NARROWING) This patch fixes various compilation warnings of the type "error: narrowing conversion of 'x' from 'datatype1' to 'datatype2' --- client/mysqlbinlog.cc | 4 ++-- include/my_getopt.h | 4 ++-- sql/log.h | 6 ++--- sql/mysqld.cc | 27 +++++++++++----------- sql/sql_profile.cc | 6 ++--- storage/innobase/handler/ha_innodb.cc | 8 +++---- storage/innodb_plugin/handler/ha_innodb.cc | 12 +++++----- 7 files changed, 34 insertions(+), 33 deletions(-) diff --git a/client/mysqlbinlog.cc b/client/mysqlbinlog.cc index dd09e7a0938..e7840865a58 100644 --- a/client/mysqlbinlog.cc +++ b/client/mysqlbinlog.cc @@ -1,5 +1,5 @@ /* - Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved. + Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -1149,7 +1149,7 @@ static struct my_option my_long_options[] = "Stop reading the binlog at position N. Applies to the last binlog " "passed on the command line.", &stop_position, &stop_position, 0, GET_ULL, - REQUIRED_ARG, (ulonglong)(~(my_off_t)0), BIN_LOG_HEADER_SIZE, + REQUIRED_ARG, (longlong)(~(my_off_t)0), BIN_LOG_HEADER_SIZE, (ulonglong)(~(my_off_t)0), 0, 0, 0}, {"to-last-log", 't', "Requires -R. Will not stop at the end of the \ requested binlog but rather continue printing until the end of the last \ diff --git a/include/my_getopt.h b/include/my_getopt.h index 8112303a6a5..5824518a085 100644 --- a/include/my_getopt.h +++ b/include/my_getopt.h @@ -1,5 +1,5 @@ /* - Copyright (c) 2002, 2011, Oracle and/or its affiliates. All rights reserved. + Copyright (c) 2002, 2012, Oracle and/or its affiliates. All rights reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -54,7 +54,7 @@ struct my_option enum get_opt_arg_type arg_type; longlong def_value; /* Default value */ longlong min_value; /* Min allowed value */ - longlong max_value; /* Max allowed value */ + ulonglong max_value; /* Max allowed value */ longlong sub_size; /* Subtract this from given value */ long block_size; /* Value should be a mult. of this */ void *app_type; /* To be used by an application */ diff --git a/sql/log.h b/sql/log.h index 9ed5db04e87..02721f1ddd0 100644 --- a/sql/log.h +++ b/sql/log.h @@ -1,5 +1,5 @@ /* - Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. + Copyright (c) 2005, 2012, Oracle and/or its affiliates. All rights reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -294,8 +294,8 @@ class MYSQL_BIN_LOG: public TC_LOG, private MYSQL_LOG int new_file_impl(bool need_lock); public: - MYSQL_LOG::generate_name; - MYSQL_LOG::is_open; + using MYSQL_LOG::generate_name; + using MYSQL_LOG::is_open; /* This is relay log */ bool is_relay_log; diff --git a/sql/mysqld.cc b/sql/mysqld.cc index db73504cb17..d6397280e0d 100644 --- a/sql/mysqld.cc +++ b/sql/mysqld.cc @@ -1,4 +1,4 @@ -/* Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved. +/* Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -6710,7 +6710,7 @@ thread is in the relay logs.", {"max_binlog_cache_size", OPT_MAX_BINLOG_CACHE_SIZE, "Can be used to restrict the total size used to cache a multi-transaction query.", &max_binlog_cache_size, &max_binlog_cache_size, 0, - GET_ULL, REQUIRED_ARG, ULONG_MAX, IO_SIZE, ULONGLONG_MAX, 0, IO_SIZE, 0}, + GET_ULL, REQUIRED_ARG, (longlong) ULONG_MAX, IO_SIZE, ULONGLONG_MAX, 0, IO_SIZE, 0}, {"max_binlog_size", OPT_MAX_BINLOG_SIZE, "Binary log will be rotated automatically when the size exceeds this " "value. Will also apply to relay logs if max_relay_log_size is 0. " @@ -6748,7 +6748,7 @@ thread is in the relay logs.", "Joins that are probably going to read more than max_join_size records return an error.", &global_system_variables.max_join_size, &max_system_variables.max_join_size, 0, GET_HA_ROWS, REQUIRED_ARG, - HA_POS_ERROR, 1, HA_POS_ERROR, 0, 1, 0}, + (longlong) HA_POS_ERROR, 1, HA_POS_ERROR, 0, 1, 0}, {"max_length_for_sort_data", OPT_MAX_LENGTH_FOR_SORT_DATA, "Max number of bytes in sorted records.", &global_system_variables.max_length_for_sort_data, @@ -6775,7 +6775,7 @@ thread is in the relay logs.", "Limit assumed max number of seeks when looking up rows based on a key.", &global_system_variables.max_seeks_for_key, &max_system_variables.max_seeks_for_key, 0, GET_ULONG, - REQUIRED_ARG, ULONG_MAX, 1, ULONG_MAX, 0, 1, 0 }, + REQUIRED_ARG, (longlong) ULONG_MAX, 1, ULONG_MAX, 0, 1, 0 }, {"max_sort_length", OPT_MAX_SORT_LENGTH, "The number of bytes to use when sorting BLOB or TEXT values (only the " "first max_sort_length bytes of each value are used; the rest are ignored).", @@ -6799,7 +6799,7 @@ thread is in the relay logs.", {"max_write_lock_count", OPT_MAX_WRITE_LOCK_COUNT, "After this many write locks, allow some read locks to run in between.", &max_write_lock_count, &max_write_lock_count, 0, GET_ULONG, - REQUIRED_ARG, ULONG_MAX, 1, ULONG_MAX, 0, 1, 0}, + REQUIRED_ARG, (longlong) ULONG_MAX, 1, ULONG_MAX, 0, 1, 0}, {"min_examined_row_limit", OPT_MIN_EXAMINED_ROW_LIMIT, "Don't log queries which examine less than min_examined_row_limit rows to file.", &global_system_variables.min_examined_row_limit, @@ -6826,18 +6826,19 @@ thread is in the relay logs.", &global_system_variables.myisam_max_extra_sort_file_size, &max_system_variables.myisam_max_extra_sort_file_size, 0, GET_ULL, REQUIRED_ARG, (ulonglong) INT_MAX32, - 0, (ulonglong) MAX_FILE_SIZE, 0, 1, 0}, + 0, MAX_FILE_SIZE, 0, 1, 0}, {"myisam_max_sort_file_size", OPT_MYISAM_MAX_SORT_FILE_SIZE, "Don't use the fast sort index method to created index if the temporary " "file would get bigger than this.", &global_system_variables.myisam_max_sort_file_size, &max_system_variables.myisam_max_sort_file_size, 0, - GET_ULL, REQUIRED_ARG, (longlong) LONG_MAX, 0, (ulonglong) MAX_FILE_SIZE, + GET_ULL, REQUIRED_ARG, (longlong) LONG_MAX, 0, MAX_FILE_SIZE, 0, 1024*1024, 0}, {"myisam_mmap_size", OPT_MYISAM_MMAP_SIZE, "Can be used to restrict the total memory used for memory mmaping of myisam files", &myisam_mmap_size, &myisam_mmap_size, 0, - GET_ULL, REQUIRED_ARG, SIZE_T_MAX, MEMMAP_EXTRA_MARGIN, SIZE_T_MAX, 0, 1, 0}, + GET_ULL, REQUIRED_ARG, (longlong) SIZE_T_MAX, MEMMAP_EXTRA_MARGIN, SIZE_T_MAX, + 0, 1, 0}, {"myisam_repair_threads", OPT_MYISAM_REPAIR_THREADS, "Specifies whether several threads should be used when repairing MyISAM " "tables. For values > 1, one thread is used per index. The value of 1 " @@ -6850,7 +6851,7 @@ thread is in the relay logs.", "or when creating indexes with CREATE INDEX or ALTER TABLE.", &global_system_variables.myisam_sort_buff_size, &max_system_variables.myisam_sort_buff_size, 0, - GET_ULONG, REQUIRED_ARG, 8192 * 1024, 4096, ~0L, 0, 1, 0}, + GET_ULONG, REQUIRED_ARG, 8192 * 1024, 4096, ~0ULL, 0, 1, 0}, {"myisam_use_mmap", OPT_MYISAM_USE_MMAP, "Use memory mapping for reading and writing MyISAM tables.", &opt_myisam_use_mmap, &opt_myisam_use_mmap, 0, GET_BOOL, NO_ARG, @@ -6953,7 +6954,7 @@ thread is in the relay logs.", {"query_cache_size", OPT_QUERY_CACHE_SIZE, "The memory allocated to store results from old queries.", &query_cache_size, &query_cache_size, 0, GET_ULONG, - REQUIRED_ARG, 0, 0, (longlong) ULONG_MAX, 0, 1024, 0}, + REQUIRED_ARG, 0, 0, ULONG_MAX, 0, 1024, 0}, #ifdef HAVE_QUERY_CACHE {"query_cache_type", OPT_QUERY_CACHE_TYPE, "0 = OFF = Don't cache or retrieve results. 1 = ON = Cache all results " @@ -7015,7 +7016,7 @@ thread is in the relay logs.", "Maximum space to use for all relay logs.", &relay_log_space_limit, &relay_log_space_limit, 0, GET_ULL, REQUIRED_ARG, 0L, 0L, - (longlong) ULONG_MAX, 0, 1, 0}, + ULONG_MAX, 0, 1, 0}, {"slave_compressed_protocol", OPT_SLAVE_COMPRESSED_PROTOCOL, "Use compression on master/slave protocol.", &opt_slave_compressed_protocol, @@ -7030,7 +7031,7 @@ thread is in the relay logs.", "it failed with a deadlock or elapsed lock wait timeout, " "before giving up and stopping.", &slave_trans_retries, &slave_trans_retries, 0, - GET_ULONG, REQUIRED_ARG, 10L, 0L, (longlong) ULONG_MAX, 0, 1, 0}, + GET_ULONG, REQUIRED_ARG, 10L, 0L, ULONG_MAX, 0, 1, 0}, #endif /* HAVE_REPLICATION */ {"slow_launch_time", OPT_SLOW_LAUNCH_TIME, "If creating the thread takes longer than this value (in seconds), " @@ -7041,7 +7042,7 @@ thread is in the relay logs.", "Each thread that needs to do a sort allocates a buffer of this size.", &global_system_variables.sortbuff_size, &max_system_variables.sortbuff_size, 0, GET_ULONG, REQUIRED_ARG, - MAX_SORT_MEMORY, MIN_SORT_MEMORY+MALLOC_OVERHEAD*2, ~0L, MALLOC_OVERHEAD, + MAX_SORT_MEMORY, MIN_SORT_MEMORY+MALLOC_OVERHEAD*2, ~0ULL, MALLOC_OVERHEAD, 1, 0}, {"sync-binlog", OPT_SYNC_BINLOG, "Synchronously flush binary log to disk after every #th event. " diff --git a/sql/sql_profile.cc b/sql/sql_profile.cc index 1a6477e4c4d..49666dde476 100644 --- a/sql/sql_profile.cc +++ b/sql/sql_profile.cc @@ -1,5 +1,5 @@ /* - Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. + Copyright (c) 2007, 2012, Oracle and/or its affiliates. All rights reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -84,8 +84,8 @@ ST_FIELD_INFO query_profile_statistics_info[]= int make_profile_table_for_show(THD *thd, ST_SCHEMA_TABLE *schema_table) { - int profile_options = thd->lex->profile_options; - int fields_include_condition_truth_values[]= { + uint profile_options = thd->lex->profile_options; + uint fields_include_condition_truth_values[]= { FALSE, /* Query_id */ FALSE, /* Seq */ TRUE, /* Status */ diff --git a/storage/innobase/handler/ha_innodb.cc b/storage/innobase/handler/ha_innodb.cc index 51b7007145c..796f51d737b 100644 --- a/storage/innobase/handler/ha_innodb.cc +++ b/storage/innobase/handler/ha_innodb.cc @@ -9128,7 +9128,7 @@ static MYSQL_SYSVAR_ULONG(max_dirty_pages_pct, srv_max_buf_pool_modified_pct, static MYSQL_SYSVAR_ULONG(max_purge_lag, srv_max_purge_lag, PLUGIN_VAR_RQCMDARG, "Desired maximum length of the purge queue (0 = no limit)", - NULL, NULL, 0, 0, ~0L, 0); + NULL, NULL, 0, 0, ~0UL, 0); static MYSQL_SYSVAR_BOOL(rollback_on_timeout, innobase_rollback_on_timeout, PLUGIN_VAR_OPCMDARG | PLUGIN_VAR_READONLY, @@ -9182,7 +9182,7 @@ static MYSQL_SYSVAR_ULONG(commit_concurrency, innobase_commit_concurrency, static MYSQL_SYSVAR_ULONG(concurrency_tickets, srv_n_free_tickets_to_enter, PLUGIN_VAR_RQCMDARG, "Number of times a thread is allowed to enter InnoDB within the same SQL query after it has once got the ticket", - NULL, NULL, 500L, 1L, ~0L, 0); + NULL, NULL, 500L, 1L, ~0UL, 0); static MYSQL_SYSVAR_LONG(file_io_threads, innobase_file_io_threads, PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY, @@ -9227,7 +9227,7 @@ static MYSQL_SYSVAR_LONG(open_files, innobase_open_files, static MYSQL_SYSVAR_ULONG(sync_spin_loops, srv_n_spin_wait_rounds, PLUGIN_VAR_RQCMDARG, "Count of spin-loop rounds in InnoDB mutexes", - NULL, NULL, 20L, 0L, ~0L, 0); + NULL, NULL, 20L, 0L, ~0UL, 0); static MYSQL_SYSVAR_ULONG(thread_concurrency, srv_thread_concurrency, PLUGIN_VAR_RQCMDARG, @@ -9237,7 +9237,7 @@ static MYSQL_SYSVAR_ULONG(thread_concurrency, srv_thread_concurrency, static MYSQL_SYSVAR_ULONG(thread_sleep_delay, srv_thread_sleep_delay, PLUGIN_VAR_RQCMDARG, "Time of innodb thread sleeping before joining InnoDB queue (usec). Value 0 disable a sleep", - NULL, NULL, 10000L, 0L, ~0L, 0); + NULL, NULL, 10000L, 0L, ~0UL, 0); static MYSQL_SYSVAR_STR(data_file_path, innobase_data_file_path, PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY, diff --git a/storage/innodb_plugin/handler/ha_innodb.cc b/storage/innodb_plugin/handler/ha_innodb.cc index 2207f9d009d..412346e8349 100644 --- a/storage/innodb_plugin/handler/ha_innodb.cc +++ b/storage/innodb_plugin/handler/ha_innodb.cc @@ -10974,7 +10974,7 @@ static MYSQL_SYSVAR_BOOL(doublewrite, innobase_use_doublewrite, static MYSQL_SYSVAR_ULONG(io_capacity, srv_io_capacity, PLUGIN_VAR_RQCMDARG, "Number of IOPs the server can do. Tunes the background IO rate", - NULL, NULL, 200, 100, ~0L, 0); + NULL, NULL, 200, 100, ~0UL, 0); static MYSQL_SYSVAR_ULONG(fast_shutdown, innobase_fast_shutdown, PLUGIN_VAR_OPCMDARG, @@ -11052,7 +11052,7 @@ static MYSQL_SYSVAR_BOOL(adaptive_flushing, srv_adaptive_flushing, static MYSQL_SYSVAR_ULONG(max_purge_lag, srv_max_purge_lag, PLUGIN_VAR_RQCMDARG, "Desired maximum length of the purge queue (0 = no limit)", - NULL, NULL, 0, 0, ~0L, 0); + NULL, NULL, 0, 0, ~0UL, 0); static MYSQL_SYSVAR_BOOL(rollback_on_timeout, innobase_rollback_on_timeout, PLUGIN_VAR_OPCMDARG | PLUGIN_VAR_READONLY, @@ -11109,7 +11109,7 @@ static MYSQL_SYSVAR_ULONG(commit_concurrency, innobase_commit_concurrency, static MYSQL_SYSVAR_ULONG(concurrency_tickets, srv_n_free_tickets_to_enter, PLUGIN_VAR_RQCMDARG, "Number of times a thread is allowed to enter InnoDB within the same SQL query after it has once got the ticket", - NULL, NULL, 500L, 1L, ~0L, 0); + NULL, NULL, 500L, 1L, ~0UL, 0); static MYSQL_SYSVAR_LONG(file_io_threads, innobase_file_io_threads, PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY | PLUGIN_VAR_NOSYSVAR, @@ -11171,12 +11171,12 @@ static MYSQL_SYSVAR_LONG(open_files, innobase_open_files, static MYSQL_SYSVAR_ULONG(sync_spin_loops, srv_n_spin_wait_rounds, PLUGIN_VAR_RQCMDARG, "Count of spin-loop rounds in InnoDB mutexes (30 by default)", - NULL, NULL, 30L, 0L, ~0L, 0); + NULL, NULL, 30L, 0L, ~0UL, 0); static MYSQL_SYSVAR_ULONG(spin_wait_delay, srv_spin_wait_delay, PLUGIN_VAR_OPCMDARG, "Maximum delay between polling for a spin lock (6 by default)", - NULL, NULL, 6L, 0L, ~0L, 0); + NULL, NULL, 6L, 0L, ~0UL, 0); static MYSQL_SYSVAR_ULONG(thread_concurrency, srv_thread_concurrency, PLUGIN_VAR_RQCMDARG, @@ -11186,7 +11186,7 @@ static MYSQL_SYSVAR_ULONG(thread_concurrency, srv_thread_concurrency, static MYSQL_SYSVAR_ULONG(thread_sleep_delay, srv_thread_sleep_delay, PLUGIN_VAR_RQCMDARG, "Time of innodb thread sleeping before joining InnoDB queue (usec). Value 0 disable a sleep", - NULL, NULL, 10000L, 0L, ~0L, 0); + NULL, NULL, 10000L, 0L, ~0UL, 0); static MYSQL_SYSVAR_STR(data_file_path, innobase_data_file_path, PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY, From 5f5df5091e6ddaf445b281f16b7dcf950ed4af02 Mon Sep 17 00:00:00 2001 From: Bjorn Munch Date: Fri, 29 Jun 2012 14:19:31 +0200 Subject: [PATCH 066/164] Fix mysql_plugin test to handle version XXa --- mysql-test/t/mysql_plugin.test | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/mysql-test/t/mysql_plugin.test b/mysql-test/t/mysql_plugin.test index 71617b86330..a05b5a624d9 100644 --- a/mysql-test/t/mysql_plugin.test +++ b/mysql-test/t/mysql_plugin.test @@ -372,11 +372,11 @@ let $MYSQL_PLUGIN_CMD= $MYSQL_PLUGIN -n --datadir=$MYSQL_DATADIR --basedir=$MYSQ --echo # Show the help. --echo # replace_result $MYSQL_PLUGIN mysql_plugin; ---replace_regex /Ver [0-9.]+ Distrib [0-9.]+/Ver V.V.VV Distrib XX.XX.XX/ /XX-m[0-9]+/XX/ +--replace_regex /Ver [0-9.]+ Distrib [0-9.]+/Ver V.V.VV Distrib XX.XX.XX/ /XX-m[0-9]+/XX/ /XX[a-z]/XX/ --exec $MYSQL_PLUGIN --help replace_result $MYSQL_PLUGIN mysql_plugin; ---replace_regex /Ver [0-9.]+ Distrib [0-9.]+/Ver V.V.VV Distrib XX.XX.XX/ /XX-m[0-9]+/XX/ +--replace_regex /Ver [0-9.]+ Distrib [0-9.]+/Ver V.V.VV Distrib XX.XX.XX/ /XX-m[0-9]+/XX/ /XX[a-z]/XX/ --exec $MYSQL_PLUGIN --version # From 521deaf36f3ae6686ebea64afe5d3195ad3f80d2 Mon Sep 17 00:00:00 2001 From: Gleb Shchepa Date: Fri, 29 Jun 2012 18:24:43 +0400 Subject: [PATCH 067/164] minor update to make MSVS happy --- sql/field.cc | 2 +- sql/sql_yacc.yy | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/sql/field.cc b/sql/field.cc index 1c937755c0c..ff631edd8d4 100644 --- a/sql/field.cc +++ b/sql/field.cc @@ -10231,7 +10231,7 @@ Create_field::Create_field(Field *old_field,Field *orig_field) if (length != 4) { char buff[sizeof("YEAR()") + MY_INT64_NUM_DECIMAL_DIGITS + 1]; - snprintf(buff, sizeof(buff), "YEAR(%lu)", length); + my_snprintf(buff, sizeof(buff), "YEAR(%lu)", length); push_warning_printf(current_thd, MYSQL_ERROR::WARN_LEVEL_NOTE, ER_WARN_DEPRECATED_SYNTAX, ER(ER_WARN_DEPRECATED_SYNTAX), diff --git a/sql/sql_yacc.yy b/sql/sql_yacc.yy index 854ba432362..7a6981f778a 100644 --- a/sql/sql_yacc.yy +++ b/sql/sql_yacc.yy @@ -5042,7 +5042,7 @@ type: if (errno == 0 && length <= MAX_FIELD_BLOBLENGTH && length != 4) { char buff[sizeof("YEAR()") + MY_INT64_NUM_DECIMAL_DIGITS + 1]; - snprintf(buff, sizeof(buff), "YEAR(%lu)", length); + my_snprintf(buff, sizeof(buff), "YEAR(%lu)", length); push_warning_printf(YYTHD, MYSQL_ERROR::WARN_LEVEL_NOTE, ER_WARN_DEPRECATED_SYNTAX, ER(ER_WARN_DEPRECATED_SYNTAX), From 2fc2d9a23287d71c665a81eac2ade64d2c22f183 Mon Sep 17 00:00:00 2001 From: Joerg Bruehe Date: Mon, 2 Jul 2012 13:09:33 +0200 Subject: [PATCH 068/164] Added some extra optional path to test suites. --- mysql-test/lib/My/Find.pm | 7 ++++--- mysql-test/lib/mtr_cases.pm | 5 ++++- 2 files changed, 8 insertions(+), 4 deletions(-) diff --git a/mysql-test/lib/My/Find.pm b/mysql-test/lib/My/Find.pm index 952a3c4143d..1f99c470e73 100644 --- a/mysql-test/lib/My/Find.pm +++ b/mysql-test/lib/My/Find.pm @@ -126,9 +126,9 @@ sub my_find_file { # # sub my_find_dir { - my ($base, $paths, $dirs, $required)= @_; - croak "usage: my_find_dir(, [, ])" - unless (@_ == 3 or @_ == 2); + my ($base, $paths, $dirs, $optional)= @_; + croak "usage: my_find_dir(, [, [, ]])" + unless (@_ == 3 or @_ == 2 or @_ == 4); # ------------------------------------------------------- # Find and return the first directory @@ -136,6 +136,7 @@ sub my_find_dir { foreach my $path (my_find_paths($base, $paths, $dirs)) { return $path if ( -d $path ); } + return "" if $optional; find_error($base, $paths, $dirs); } diff --git a/mysql-test/lib/mtr_cases.pm b/mysql-test/lib/mtr_cases.pm index c8381e16061..2f68b70e3e2 100644 --- a/mysql-test/lib/mtr_cases.pm +++ b/mysql-test/lib/mtr_cases.pm @@ -137,6 +137,7 @@ sub collect_test_cases ($$$$) { { push(@$cases, collect_one_suite($suite, $opt_cases, $opt_skip_test_list)); last if $some_test_found; + push(@$cases, collect_one_suite("i_".$suite, $opt_cases, $opt_skip_test_list)); } } @@ -288,13 +289,15 @@ sub collect_one_suite($) $suitedir= my_find_dir($::basedir, ["share/mysql-test/suite", "mysql-test/suite", + "internal/mysql-test/suite", "mysql-test", # Look in storage engine specific suite dirs "storage/*/mtr", # Look in plugin specific suite dir "plugin/$suite/tests", ], - [$suite, "mtr"]); + [$suite, "mtr"], ($suite =~ /^i_/)); + return unless $suitedir; } mtr_verbose("suitedir: $suitedir"); } From 608c2c018e27cd27df8cbd57e3538509734e8dc0 Mon Sep 17 00:00:00 2001 From: Mayank Prasad Date: Tue, 3 Jul 2012 09:55:51 +0530 Subject: [PATCH 069/164] Bug#13417440 : 63340: ARCHIVE FILE IO NOT INSTRUMENTED Details: - Modified test case to make sure its run for all and not only for archive Storage Engine. --- mysql-test/suite/perfschema/r/query_cache.result | 12 ++++++------ mysql-test/suite/perfschema/t/query_cache.test | 5 ++--- 2 files changed, 8 insertions(+), 9 deletions(-) diff --git a/mysql-test/suite/perfschema/r/query_cache.result b/mysql-test/suite/perfschema/r/query_cache.result index 56511999ab2..8786cd055ca 100644 --- a/mysql-test/suite/perfschema/r/query_cache.result +++ b/mysql-test/suite/perfschema/r/query_cache.result @@ -36,9 +36,9 @@ Qcache_hits 1 select spins from performance_schema.events_waits_current order by event_name limit 1; spins NULL -select name from performance_schema.setup_instruments order by name limit 1; -name -wait/io/file/archive/data +select * from performance_schema.setup_timers where name='wait'; +NAME TIMER_NAME +wait CYCLE show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 1 @@ -51,9 +51,9 @@ Qcache_hits 1 select spins from performance_schema.events_waits_current order by event_name limit 1; spins NULL -select name from performance_schema.setup_instruments order by name limit 1; -name -wait/io/file/archive/data +select * from performance_schema.setup_timers where name='wait'; +NAME TIMER_NAME +wait CYCLE show status like "Qcache_queries_in_cache"; Variable_name Value Qcache_queries_in_cache 1 diff --git a/mysql-test/suite/perfschema/t/query_cache.test b/mysql-test/suite/perfschema/t/query_cache.test index 08292306a25..60d4a648222 100644 --- a/mysql-test/suite/perfschema/t/query_cache.test +++ b/mysql-test/suite/perfschema/t/query_cache.test @@ -6,7 +6,6 @@ --source include/have_query_cache.inc --source include/not_embedded.inc --source include/have_perfschema.inc ---source include/have_archive.inc --disable_warnings drop table if exists t1; @@ -35,7 +34,7 @@ show status like "Qcache_hits"; select spins from performance_schema.events_waits_current order by event_name limit 1; -select name from performance_schema.setup_instruments order by name limit 1; +select * from performance_schema.setup_timers where name='wait'; show status like "Qcache_queries_in_cache"; show status like "Qcache_inserts"; @@ -43,7 +42,7 @@ show status like "Qcache_hits"; select spins from performance_schema.events_waits_current order by event_name limit 1; -select name from performance_schema.setup_instruments order by name limit 1; +select * from performance_schema.setup_timers where name='wait'; show status like "Qcache_queries_in_cache"; show status like "Qcache_inserts"; From 91c8e79fcd98bb586f32b22f5d67fcd5ae08ae28 Mon Sep 17 00:00:00 2001 From: Rohit Kalhans Date: Tue, 3 Jul 2012 18:00:21 +0530 Subject: [PATCH 070/164] BUG#11762667:MYSQLBINLOG IGNORES ERRORS WHILE WRITING OUTPUT This is a followup patch for the bug enabling the test i_binlog.binlog_mysqlbinlog_file_write.test this was disabled in mysql trunk and mysql 5.5 as in the release build mysqlbinlog was not debug compiled whereas the mysqld was. Since have_debug.inc script checks only for mysqld to be debug compiled, the test was not being skipped on release builds. We resolve this problem by creating a new inc file mysqlbinlog_have_debug.inc which checks exclusively for mysqlbinlog to be debug compiled. if not it skips the test. mysql-test/include/mysqlbinlog_have_debug.inc: new inc file to check if mysqlbinlog is debug compiled. --- mysql-test/include/mysqlbinlog_have_debug.inc | 34 +++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 mysql-test/include/mysqlbinlog_have_debug.inc diff --git a/mysql-test/include/mysqlbinlog_have_debug.inc b/mysql-test/include/mysqlbinlog_have_debug.inc new file mode 100644 index 00000000000..14da1379ecd --- /dev/null +++ b/mysql-test/include/mysqlbinlog_have_debug.inc @@ -0,0 +1,34 @@ +############################################# +# checks if mysqlbinlog is debug compiled +# this "cannot" be done simply by using +# have_debug.inc +############################################# + +--disable_query_log +--let $temp_out_help_file=$MYSQL_TMP_DIR/mysqlbinlog_help.tmp +--exec $MYSQL_BINLOG --help>$temp_out_help_file +let log_tmp=$temp_out_help_file; +--let $temp_inc=$MYSQL_TMP_DIR/temp.inc +let inc_tmp=$temp_inc; + +--perl +use strict; +my $tmp_file= $ENV{'log_tmp'} or die "log_tmp not set"; +open(FILE, "$tmp_file") or die("Unable to open $tmp_file: $!\n"); +my $count = () = grep(/Output debug log/g,); +close FILE; + +my $temp_inc= $ENV{'inc_tmp'} or die "temp_inc not set"; +open(FILE_INC,">", "$temp_inc") or die("can't open file \"$temp_inc\": $!"); +print FILE_INC '--let $is_debug= '.$count; +close FILE_INC; +EOF +--source $temp_inc + +if (!$is_debug) +{ + --skip mysqlbinlog needs to be debug compiled +} +--remove_file $temp_out_help_file +--remove_file $temp_inc +--enable_query_log From 9ce35ffc8677ff3c7171576497ed6c7330000b72 Mon Sep 17 00:00:00 2001 From: Georgi Kodinov Date: Wed, 4 Jul 2012 17:48:58 +0300 Subject: [PATCH 071/164] Bug #11753490: 44939: sql dumps containing broad views fail when executing The problem is that mysql lacks information about the objects a view depends on so it can't dump views and tables in the proper order. Thus it needs to create "stand-in" myisam tables for each view while dumping the tables that it later drops and replaces with the actual view view definition. But since views can have much more columns than an actual table creating these stand-in tables may be problematic. There's no way to portably find out how many columns an mysiam table can have. It's a complicated formula depending on internal server constants. Thus we can't have a reliable error check without repeating the logic and the formula inside mysqldump. 1. Changed the type of the columns of the stand-in tables mysqldump makes to satisfy view dependencies from the original type to smallint to save on row space. 2. Added a warning on the mysqldump's standard error for a possible problems replaying the dump file if the columns of a view exceed 1000. 3. Added a test case. --- client/mysqldump.c | 35 ++++++++++++++++++++------ mysql-test/r/mysqldump.result | 46 +++++++++++++++++------------------ 2 files changed, 51 insertions(+), 30 deletions(-) diff --git a/client/mysqldump.c b/client/mysqldump.c index e273ca0e7fd..dcfe25a5f61 100644 --- a/client/mysqldump.c +++ b/client/mysqldump.c @@ -2558,6 +2558,7 @@ static uint get_table_structure(char *table, char *db, char *table_type, if (strcmp(field->name, "View") == 0) { char *scv_buff= NULL; + my_ulonglong n_cols; verbose_msg("-- It's a view, create dummy table for view\n"); @@ -2572,8 +2573,8 @@ static uint get_table_structure(char *table, char *db, char *table_type, the same name in order to satisfy views that depend on this view. The table will be removed when the actual view is created. - The properties of each column, aside from the data type, are not - preserved in this temporary table, because they are not necessary. + The properties of each column, are not preserved in this temporary + table, because they are not necessary. This will not be necessary once we can determine dependencies between views and can simply dump them in the appropriate order. @@ -2600,8 +2601,23 @@ static uint get_table_structure(char *table, char *db, char *table_type, else my_free(scv_buff); - if (mysql_num_rows(result)) + n_cols= mysql_num_rows(result); + if (0 != n_cols) { + + /* + The actual formula is based on the column names and how the .FRM + files are stored and is too volatile to be repeated here. + Thus we simply warn the user if the columns exceed a limit we + know works most of the time. + */ + if (n_cols >= 1000) + fprintf(stderr, + "-- Warning: Creating a stand-in table for view %s may" + " fail when replaying the dump file produced because " + "of the number of columns exceeding 1000. Exercise " + "caution when replaying the produced dump file.\n", + table); if (opt_drop) { /* @@ -2628,14 +2644,19 @@ static uint get_table_structure(char *table, char *db, char *table_type, row= mysql_fetch_row(result); - fprintf(sql_file, " %s %s", quote_name(row[0], name_buff, 0), - row[1]); + /* + The actual column type doesn't matter anyway, since the table will + be dropped at run time. + We do tinyint to avoid hitting the row size limit. + */ + fprintf(sql_file, " %s tinyint NOT NULL", + quote_name(row[0], name_buff, 0)); while((row= mysql_fetch_row(result))) { /* col name, col type */ - fprintf(sql_file, ",\n %s %s", - quote_name(row[0], name_buff, 0), row[1]); + fprintf(sql_file, ",\n %s tinyint NOT NULL", + quote_name(row[0], name_buff, 0)); } /* diff --git a/mysql-test/r/mysqldump.result b/mysql-test/r/mysqldump.result index 15fdddb18be..5f3b29f5f7c 100644 --- a/mysql-test/r/mysqldump.result +++ b/mysql-test/r/mysqldump.result @@ -1988,7 +1988,7 @@ DROP TABLE IF EXISTS `v2`; SET @saved_cs_client = @@character_set_client; SET character_set_client = utf8; /*!50001 CREATE TABLE `v2` ( - `a` varchar(30) + `a` tinyint NOT NULL ) ENGINE=MyISAM */; SET character_set_client = @saved_cs_client; /*!50001 DROP TABLE IF EXISTS `v2`*/; @@ -2082,7 +2082,7 @@ DROP TABLE IF EXISTS `v1`; SET @saved_cs_client = @@character_set_client; SET character_set_client = utf8; /*!50001 CREATE TABLE `v1` ( - `a` int(11) + `a` tinyint NOT NULL ) ENGINE=MyISAM */; SET character_set_client = @saved_cs_client; /*!50001 DROP TABLE IF EXISTS `v1`*/; @@ -2156,7 +2156,7 @@ DROP TABLE IF EXISTS `v2`; SET @saved_cs_client = @@character_set_client; SET character_set_client = utf8; /*!50001 CREATE TABLE `v2` ( - `a` varchar(30) + `a` tinyint NOT NULL ) ENGINE=MyISAM */; SET character_set_client = @saved_cs_client; /*!50001 DROP TABLE IF EXISTS `v2`*/; @@ -2270,9 +2270,9 @@ DROP TABLE IF EXISTS `v1`; SET @saved_cs_client = @@character_set_client; SET character_set_client = utf8; /*!50001 CREATE TABLE `v1` ( - `a` int(11), - `b` int(11), - `c` varchar(30) + `a` tinyint NOT NULL, + `b` tinyint NOT NULL, + `c` tinyint NOT NULL ) ENGINE=MyISAM */; SET character_set_client = @saved_cs_client; DROP TABLE IF EXISTS `v2`; @@ -2280,7 +2280,7 @@ DROP TABLE IF EXISTS `v2`; SET @saved_cs_client = @@character_set_client; SET character_set_client = utf8; /*!50001 CREATE TABLE `v2` ( - `a` int(11) + `a` tinyint NOT NULL ) ENGINE=MyISAM */; SET character_set_client = @saved_cs_client; DROP TABLE IF EXISTS `v3`; @@ -2288,9 +2288,9 @@ DROP TABLE IF EXISTS `v3`; SET @saved_cs_client = @@character_set_client; SET character_set_client = utf8; /*!50001 CREATE TABLE `v3` ( - `a` int(11), - `b` int(11), - `c` varchar(30) + `a` tinyint NOT NULL, + `b` tinyint NOT NULL, + `c` tinyint NOT NULL ) ENGINE=MyISAM */; SET character_set_client = @saved_cs_client; /*!50001 DROP TABLE IF EXISTS `v1`*/; @@ -3027,9 +3027,9 @@ DROP TABLE IF EXISTS `v0`; SET @saved_cs_client = @@character_set_client; SET character_set_client = utf8; /*!50001 CREATE TABLE `v0` ( - `a` int(11), - `b` varchar(32), - `c` varchar(32) + `a` tinyint NOT NULL, + `b` tinyint NOT NULL, + `c` tinyint NOT NULL ) ENGINE=MyISAM */; SET character_set_client = @saved_cs_client; DROP TABLE IF EXISTS `v1`; @@ -3037,9 +3037,9 @@ DROP TABLE IF EXISTS `v1`; SET @saved_cs_client = @@character_set_client; SET character_set_client = utf8; /*!50001 CREATE TABLE `v1` ( - `a` int(11), - `b` varchar(32), - `c` varchar(32) + `a` tinyint NOT NULL, + `b` tinyint NOT NULL, + `c` tinyint NOT NULL ) ENGINE=MyISAM */; SET character_set_client = @saved_cs_client; DROP TABLE IF EXISTS `v2`; @@ -3047,9 +3047,9 @@ DROP TABLE IF EXISTS `v2`; SET @saved_cs_client = @@character_set_client; SET character_set_client = utf8; /*!50001 CREATE TABLE `v2` ( - `a` int(11), - `b` varchar(32), - `c` varchar(32) + `a` tinyint NOT NULL, + `b` tinyint NOT NULL, + `c` tinyint NOT NULL ) ENGINE=MyISAM */; SET character_set_client = @saved_cs_client; @@ -3429,7 +3429,7 @@ DROP TABLE IF EXISTS `v1`; SET @saved_cs_client = @@character_set_client; SET character_set_client = utf8; /*!50001 CREATE TABLE `v1` ( - `id` int(11) + `id` tinyint NOT NULL ) ENGINE=MyISAM */; SET character_set_client = @saved_cs_client; @@ -3489,7 +3489,7 @@ USE `mysqldump_views`; SET @saved_cs_client = @@character_set_client; SET character_set_client = utf8; /*!50001 CREATE TABLE `nasishnasifu` ( - `id` bigint(20) unsigned + `id` tinyint NOT NULL ) ENGINE=MyISAM */; SET character_set_client = @saved_cs_client; @@ -3882,7 +3882,7 @@ DROP TABLE IF EXISTS `v2`; SET @saved_cs_client = @@character_set_client; SET character_set_client = utf8; /*!50001 CREATE TABLE `v2` ( - `c` int(11) + `c` tinyint NOT NULL ) ENGINE=MyISAM */; SET character_set_client = @saved_cs_client; /*!50001 DROP TABLE IF EXISTS `v2`*/; @@ -4299,7 +4299,7 @@ DROP TABLE IF EXISTS `v1`; SET @saved_cs_client = @@character_set_client; SET character_set_client = utf8; /*!50001 CREATE TABLE `v1` ( - `id` int(11) + `id` tinyint NOT NULL ) ENGINE=MyISAM */; SET character_set_client = @saved_cs_client; From 06f6e4fe957c6edd7b3655d4987d0fbd67cdb9d6 Mon Sep 17 00:00:00 2001 From: Georgi Kodinov Date: Thu, 5 Jul 2012 09:55:20 +0300 Subject: [PATCH 072/164] Bug #12998841: libmysql divulges plaintext password upon request in 5.5 1. Clear text password client plugin disabled by default. 2. Added an environment variable LIBMYSQL_ENABLE_CLEARTEXT_PLUGIN, that when set to something starting with '1', 'Y' or 'y' will enable the clear text plugin for all connections. 3. Added a new mysql_options() option : MYSQL_ENABLE_CLEARTEXT_PLUGIN that takes an my_bool argument. When the value of the argument is non-zero the clear text plugin is enabled for this connection only. 4. Added an enable-cleartext-plugin config file option that takes a numeric argument. If the numeric value of the numeric argument is non-zero the clear text plugin is enabled for the connection 5. Added a boolean command line option "--enable_cleartext_plugin" to mysql, mysqlslap and mysqladmin. When specified it will call mysql_options with the effect of #3 6. Added a new CLEARTEXT option to the connect command in mysqltest. When specified it will enable the cleartext plugin for usage. 7. Added test cases and updated existing ones that need the clear text plugin. --- client/client_priv.h | 1 + client/mysql.cc | 13 +++++++ client/mysqladmin.cc | 13 +++++++ client/mysqlslap.c | 12 ++++++ client/mysqltest.cc | 8 +++- include/mysql.h | 3 +- include/mysql.h.pp | 3 +- include/sql_common.h | 2 + mysql-test/t/plugin_auth.test | 4 +- sql-common/client.c | 69 ++++++++++++++++++++++++++++++----- sql-common/client_plugin.c | 5 +++ 11 files changed, 119 insertions(+), 14 deletions(-) diff --git a/client/client_priv.h b/client/client_priv.h index b776dcf8014..2362811d2b3 100644 --- a/client/client_priv.h +++ b/client/client_priv.h @@ -87,6 +87,7 @@ enum options_client OPT_PLUGIN_DIR, OPT_DEFAULT_AUTH, OPT_DEFAULT_PLUGIN, + OPT_ENABLE_CLEARTEXT_PLUGIN, OPT_MAX_CLIENT_OPTION }; diff --git a/client/mysql.cc b/client/mysql.cc index b6bc2f4b68f..630c6215603 100644 --- a/client/mysql.cc +++ b/client/mysql.cc @@ -148,6 +148,8 @@ static my_bool column_types_flag; static my_bool preserve_comments= 0; static ulong opt_max_allowed_packet, opt_net_buffer_length; static uint verbose=0,opt_silent=0,opt_mysql_port=0, opt_local_infile=0; +static uint opt_enable_cleartext_plugin= 0; +static my_bool using_opt_enable_cleartext_plugin= 0; static uint my_end_arg; static char * opt_mysql_unix_port=0; static int connect_flag=CLIENT_INTERACTIVE; @@ -1409,6 +1411,10 @@ static struct my_option my_long_options[] = &default_charset, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0}, {"delimiter", OPT_DELIMITER, "Delimiter to be used.", &delimiter_str, &delimiter_str, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0}, + {"enable_cleartext_plugin", OPT_ENABLE_CLEARTEXT_PLUGIN, + "Enable/disable the clear text authentication plugin.", + &opt_enable_cleartext_plugin, &opt_enable_cleartext_plugin, + 0, GET_BOOL, OPT_ARG, 0, 0, 0, 0, 0, 0}, {"execute", 'e', "Execute command and quit. (Disables --force and history file.)", 0, 0, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0}, {"vertical", 'E', "Print the output of a query (rows) vertically.", @@ -1636,6 +1642,9 @@ get_one_option(int optid, const struct my_option *opt __attribute__((unused)), case OPT_LOCAL_INFILE: using_opt_local_infile=1; break; + case OPT_ENABLE_CLEARTEXT_PLUGIN: + using_opt_enable_cleartext_plugin= TRUE; + break; case OPT_TEE: if (argument == disabled_my_option) { @@ -4321,6 +4330,10 @@ sql_real_connect(char *host,char *database,char *user,char *password, if (opt_default_auth && *opt_default_auth) mysql_options(&mysql, MYSQL_DEFAULT_AUTH, opt_default_auth); + if (using_opt_enable_cleartext_plugin) + mysql_options(&mysql, MYSQL_ENABLE_CLEARTEXT_PLUGIN, + (char*) &opt_enable_cleartext_plugin); + if (!mysql_real_connect(&mysql, host, user, password, database, opt_mysql_port, opt_mysql_unix_port, connect_flag | CLIENT_MULTI_STATEMENTS)) diff --git a/client/mysqladmin.cc b/client/mysqladmin.cc index 3f33c25e664..321efd36642 100644 --- a/client/mysqladmin.cc +++ b/client/mysqladmin.cc @@ -43,6 +43,8 @@ static uint opt_count_iterations= 0, my_end_arg; static ulong opt_connect_timeout, opt_shutdown_timeout; static char * unix_port=0; static char *opt_plugin_dir= 0, *opt_default_auth= 0; +static uint opt_enable_cleartext_plugin= 0; +static my_bool using_opt_enable_cleartext_plugin= 0; #ifdef HAVE_SMEM static char *shared_memory_base_name=0; @@ -212,6 +214,10 @@ static struct my_option my_long_options[] = "Default authentication client-side plugin to use.", &opt_default_auth, &opt_default_auth, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0}, + {"enable_cleartext_plugin", OPT_ENABLE_CLEARTEXT_PLUGIN, + "Enable/disable the clear text authentication plugin.", + &opt_enable_cleartext_plugin, &opt_enable_cleartext_plugin, + 0, GET_BOOL, OPT_ARG, 0, 0, 0, 0, 0, 0}, { 0, 0, 0, 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0} }; @@ -282,6 +288,9 @@ get_one_option(int optid, const struct my_option *opt __attribute__((unused)), opt_protocol= find_type_or_exit(argument, &sql_protocol_typelib, opt->name); break; + case OPT_ENABLE_CLEARTEXT_PLUGIN: + using_opt_enable_cleartext_plugin= TRUE; + break; } if (error) { @@ -354,6 +363,10 @@ int main(int argc,char *argv[]) if (opt_default_auth && *opt_default_auth) mysql_options(&mysql, MYSQL_DEFAULT_AUTH, opt_default_auth); + if (using_opt_enable_cleartext_plugin) + mysql_options(&mysql, MYSQL_ENABLE_CLEARTEXT_PLUGIN, + (char*) &opt_enable_cleartext_plugin); + if (sql_connect(&mysql, option_wait)) { /* diff --git a/client/mysqlslap.c b/client/mysqlslap.c index a2c01b85b5a..ac1cc31733c 100644 --- a/client/mysqlslap.c +++ b/client/mysqlslap.c @@ -125,6 +125,8 @@ static char *host= NULL, *opt_password= NULL, *user= NULL, *post_system= NULL, *opt_mysql_unix_port= NULL; static char *opt_plugin_dir= 0, *opt_default_auth= 0; +static uint opt_enable_cleartext_plugin= 0; +static my_bool using_opt_enable_cleartext_plugin= 0; const char *delimiter= "\n"; @@ -348,6 +350,9 @@ int main(int argc, char **argv) if (opt_default_auth && *opt_default_auth) mysql_options(&mysql, MYSQL_DEFAULT_AUTH, opt_default_auth); + if (using_opt_enable_cleartext_plugin) + mysql_options(&mysql, MYSQL_ENABLE_CLEARTEXT_PLUGIN, + (char*) &opt_enable_cleartext_plugin); if (!opt_only_print) { if (!(mysql_real_connect(&mysql, host, user, opt_password, @@ -603,6 +608,10 @@ static struct my_option my_long_options[] = "Detach (close and reopen) connections after X number of requests.", &detach_rate, &detach_rate, 0, GET_UINT, REQUIRED_ARG, 0, 0, 0, 0, 0, 0}, + {"enable_cleartext_plugin", OPT_ENABLE_CLEARTEXT_PLUGIN, + "Enable/disable the clear text authentication plugin.", + &opt_enable_cleartext_plugin, &opt_enable_cleartext_plugin, + 0, GET_BOOL, OPT_ARG, 0, 0, 0, 0, 0, 0}, {"engine", 'e', "Storage engine to use for creating the table.", &default_engine, &default_engine, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0}, @@ -761,6 +770,9 @@ get_one_option(int optid, const struct my_option *opt __attribute__((unused)), case 'I': /* Info */ usage(); exit(0); + case OPT_ENABLE_CLEARTEXT_PLUGIN: + using_opt_enable_cleartext_plugin= TRUE; + break; } DBUG_RETURN(0); } diff --git a/client/mysqltest.cc b/client/mysqltest.cc index b1784fdc7b6..34d8edcbe0b 100644 --- a/client/mysqltest.cc +++ b/client/mysqltest.cc @@ -5456,7 +5456,7 @@ void do_connect(struct st_command *command) int con_port= opt_port; char *con_options; my_bool con_ssl= 0, con_compress= 0; - my_bool con_pipe= 0, con_shm= 0; + my_bool con_pipe= 0, con_shm= 0, con_cleartext_enable= 0; struct st_connection* con_slot; static DYNAMIC_STRING ds_connection_name; @@ -5546,6 +5546,8 @@ void do_connect(struct st_command *command) con_pipe= 1; else if (!strncmp(con_options, "SHM", 3)) con_shm= 1; + else if (!strncmp(con_options, "CLEARTEXT", 9)) + con_cleartext_enable= 1; else die("Illegal option to connect: %.*s", (int) (end - con_options), con_options); @@ -5642,6 +5644,10 @@ void do_connect(struct st_command *command) if (ds_default_auth.length) mysql_options(&con_slot->mysql, MYSQL_DEFAULT_AUTH, ds_default_auth.str); + + if (con_cleartext_enable) + mysql_options(&con_slot->mysql, MYSQL_ENABLE_CLEARTEXT_PLUGIN, + (char*) &con_cleartext_enable); /* Special database to allow one to connect without a database name */ if (ds_database.length && !strcmp(ds_database.str,"*NO-ONE*")) dynstr_set(&ds_database, ""); diff --git a/include/mysql.h b/include/mysql.h index cff8c647152..0ed35413a1c 100644 --- a/include/mysql.h +++ b/include/mysql.h @@ -166,7 +166,8 @@ enum mysql_option MYSQL_OPT_USE_REMOTE_CONNECTION, MYSQL_OPT_USE_EMBEDDED_CONNECTION, MYSQL_OPT_GUESS_CONNECTION, MYSQL_SET_CLIENT_IP, MYSQL_SECURE_AUTH, MYSQL_REPORT_DATA_TRUNCATION, MYSQL_OPT_RECONNECT, - MYSQL_OPT_SSL_VERIFY_SERVER_CERT, MYSQL_PLUGIN_DIR, MYSQL_DEFAULT_AUTH + MYSQL_OPT_SSL_VERIFY_SERVER_CERT, MYSQL_PLUGIN_DIR, MYSQL_DEFAULT_AUTH, + MYSQL_ENABLE_CLEARTEXT_PLUGIN }; /** diff --git a/include/mysql.h.pp b/include/mysql.h.pp index 15ec563dfc2..c2c5ba35044 100644 --- a/include/mysql.h.pp +++ b/include/mysql.h.pp @@ -262,7 +262,8 @@ enum mysql_option MYSQL_OPT_USE_REMOTE_CONNECTION, MYSQL_OPT_USE_EMBEDDED_CONNECTION, MYSQL_OPT_GUESS_CONNECTION, MYSQL_SET_CLIENT_IP, MYSQL_SECURE_AUTH, MYSQL_REPORT_DATA_TRUNCATION, MYSQL_OPT_RECONNECT, - MYSQL_OPT_SSL_VERIFY_SERVER_CERT, MYSQL_PLUGIN_DIR, MYSQL_DEFAULT_AUTH + MYSQL_OPT_SSL_VERIFY_SERVER_CERT, MYSQL_PLUGIN_DIR, MYSQL_DEFAULT_AUTH, + MYSQL_ENABLE_CLEARTEXT_PLUGIN }; struct st_mysql_options_extention; struct st_mysql_options { diff --git a/include/sql_common.h b/include/sql_common.h index 307b443d6d6..a2ea3ac45e7 100644 --- a/include/sql_common.h +++ b/include/sql_common.h @@ -31,6 +31,7 @@ extern const char *not_error_sqlstate; struct st_mysql_options_extention { char *plugin_dir; char *default_auth; + my_bool enable_cleartext_plugin; }; typedef struct st_mysql_methods @@ -104,6 +105,7 @@ int mysql_client_plugin_init(); void mysql_client_plugin_deinit(); struct st_mysql_client_plugin; extern struct st_mysql_client_plugin *mysql_client_builtins[]; +extern my_bool libmysql_cleartext_plugin_enabled; #ifdef __cplusplus } diff --git a/mysql-test/t/plugin_auth.test b/mysql-test/t/plugin_auth.test index f169360cf2e..75d3ef3e807 100644 --- a/mysql-test/t/plugin_auth.test +++ b/mysql-test/t/plugin_auth.test @@ -422,10 +422,10 @@ CREATE USER uplain@localhost IDENTIFIED WITH 'cleartext_plugin_server' --echo ## test plugin auth --disable_query_log --error ER_ACCESS_DENIED_ERROR : this should fail : no grant -connect(cleartext_fail_con,localhost,uplain,cleartext_test2); +connect(cleartext_fail_con,localhost,uplain,cleartext_test2,,,,CLEARTEXT); --enable_query_log -connect(cleartext_con,localhost,uplain,cleartext_test); +connect(cleartext_con,localhost,uplain,cleartext_test,,,,CLEARTEXT); connection cleartext_con; select USER(),CURRENT_USER(); diff --git a/sql-common/client.c b/sql-common/client.c index 08f4bfb1151..381768834cd 100644 --- a/sql-common/client.c +++ b/sql-common/client.c @@ -1136,7 +1136,8 @@ static const char *default_options[]= "connect-timeout", "local-infile", "disable-local-infile", "ssl-cipher", "max-allowed-packet", "protocol", "shared-memory-base-name", "multi-results", "multi-statements", "multi-queries", "secure-auth", - "report-data-truncation", "plugin-dir", "default-auth", + "report-data-truncation", "plugin-dir", "default-auth", + "enable-cleartext-plugin", NullS }; enum option_id { @@ -1148,6 +1149,7 @@ enum option_id { OPT_ssl_cipher, OPT_max_allowed_packet, OPT_protocol, OPT_shared_memory_base_name, OPT_multi_results, OPT_multi_statements, OPT_multi_queries, OPT_secure_auth, OPT_report_data_truncation, OPT_plugin_dir, OPT_default_auth, + OPT_enable_cleartext_plugin, OPT_keep_this_one_last }; @@ -1180,14 +1182,27 @@ static int add_init_command(struct st_mysql_options *options, const char *cmd) return 0; } -#define EXTENSION_SET_STRING(OPTS, X, STR) \ - if ((OPTS)->extension) \ - my_free((OPTS)->extension->X); \ - else \ +#define ALLOCATE_EXTENSIONS(OPTS) \ (OPTS)->extension= (struct st_mysql_options_extention *) \ my_malloc(sizeof(struct st_mysql_options_extention), \ - MYF(MY_WME | MY_ZEROFILL)); \ - (OPTS)->extension->X= my_strdup((STR), MYF(MY_WME)); + MYF(MY_WME | MY_ZEROFILL)) \ + +#define ENSURE_EXTENSIONS_PRESENT(OPTS) \ + do { \ + if (!(OPTS)->extension) \ + ALLOCATE_EXTENSIONS(OPTS); \ + } while (0) + + +#define EXTENSION_SET_STRING(OPTS, X, STR) \ + do { \ + if ((OPTS)->extension) \ + my_free((OPTS)->extension->X); \ + else \ + ALLOCATE_EXTENSIONS(OPTS); \ + (OPTS)->extension->X= ((STR) != NULL) ? \ + my_strdup((STR), MYF(MY_WME)) : NULL; \ + } while (0) void mysql_read_default_options(struct st_mysql_options *options, const char *filename,const char *group) @@ -1386,6 +1401,12 @@ void mysql_read_default_options(struct st_mysql_options *options, case OPT_default_auth: EXTENSION_SET_STRING(options, default_auth, opt_arg); break; + + case OPT_enable_cleartext_plugin: + ENSURE_EXTENSIONS_PRESENT(options); + options->extension->enable_cleartext_plugin= + (!opt_arg || atoi(opt_arg) != 0) ? TRUE : FALSE; + default: DBUG_PRINT("warning",("unknown option: %s",option[0])); } @@ -2782,6 +2803,27 @@ static void client_mpvio_info(MYSQL_PLUGIN_VIO *vio, mpvio_info(mpvio->mysql->net.vio, info); } + +my_bool libmysql_cleartext_plugin_enabled= 0; + +static my_bool check_plugin_enabled(MYSQL *mysql, auth_plugin_t *plugin) +{ + if (plugin == &clear_password_client_plugin && + (!libmysql_cleartext_plugin_enabled && + (!mysql->options.extension || + !mysql->options.extension->enable_cleartext_plugin))) + { + set_mysql_extended_error(mysql, CR_AUTH_PLUGIN_CANNOT_LOAD, + unknown_sqlstate, + ER(CR_AUTH_PLUGIN_CANNOT_LOAD), + clear_password_client_plugin.name, + "plugin not enabled"); + return TRUE; + } + return FALSE; +} + + /** Client side of the plugin driver authentication. @@ -2824,6 +2866,9 @@ int run_plugin_auth(MYSQL *mysql, char *data, uint data_len, auth_plugin_name= auth_plugin->name; } + if (check_plugin_enabled(mysql, auth_plugin)) + DBUG_RETURN(1); + DBUG_PRINT ("info", ("using plugin %s", auth_plugin_name)); mysql->net.last_errno= 0; /* just in case */ @@ -2915,6 +2960,9 @@ int run_plugin_auth(MYSQL *mysql, char *data, uint data_len, auth_plugin_name, MYSQL_CLIENT_AUTHENTICATION_PLUGIN))) DBUG_RETURN (1); + if (check_plugin_enabled(mysql, auth_plugin)) + DBUG_RETURN(1); + mpvio.plugin= auth_plugin; res= auth_plugin->authenticate_user((struct st_plugin_vio *)&mpvio, mysql); @@ -4117,6 +4165,11 @@ mysql_options(MYSQL *mysql,enum mysql_option option, const void *arg) case MYSQL_DEFAULT_AUTH: EXTENSION_SET_STRING(&mysql->options, default_auth, arg); break; + case MYSQL_ENABLE_CLEARTEXT_PLUGIN: + ENSURE_EXTENSIONS_PRESENT(&mysql->options); + mysql->options.extension->enable_cleartext_plugin= + (*(my_bool*) arg) ? TRUE : FALSE; + break; default: DBUG_RETURN(1); } @@ -4336,5 +4389,3 @@ static int clear_password_auth_client(MYSQL_PLUGIN_VIO *vio, MYSQL *mysql) return res ? CR_ERROR : CR_OK; } - - diff --git a/sql-common/client_plugin.c b/sql-common/client_plugin.c index 4016f0744be..75faeb7ee97 100644 --- a/sql-common/client_plugin.c +++ b/sql-common/client_plugin.c @@ -197,6 +197,10 @@ err1: static void load_env_plugins(MYSQL *mysql) { char *plugs, *free_env, *s= getenv("LIBMYSQL_PLUGINS"); + char *enable_cleartext_plugin= getenv("LIBMYSQL_ENABLE_CLEARTEXT_PLUGIN"); + + if (enable_cleartext_plugin && strchr("1Yy", enable_cleartext_plugin[0])) + libmysql_cleartext_plugin_enabled= 1; /* no plugins to load */ if(!s) @@ -212,6 +216,7 @@ static void load_env_plugins(MYSQL *mysql) } while (s); my_free(free_env); + } /********** extern functions to be used by libmysql *********************/ From fb3e11d0ab9317a73619d1e5c01669a7c6e034f9 Mon Sep 17 00:00:00 2001 From: Georgi Kodinov Date: Thu, 5 Jul 2012 10:18:18 +0300 Subject: [PATCH 073/164] fixed a missing break --- sql-common/client.c | 1 + 1 file changed, 1 insertion(+) diff --git a/sql-common/client.c b/sql-common/client.c index 381768834cd..be24c5e89e4 100644 --- a/sql-common/client.c +++ b/sql-common/client.c @@ -1406,6 +1406,7 @@ void mysql_read_default_options(struct st_mysql_options *options, ENSURE_EXTENSIONS_PRESENT(options); options->extension->enable_cleartext_plugin= (!opt_arg || atoi(opt_arg) != 0) ? TRUE : FALSE; + break; default: DBUG_PRINT("warning",("unknown option: %s",option[0])); From 048577429f3adcb27100ace3dd6fd4579bcd9e53 Mon Sep 17 00:00:00 2001 From: Georgi Kodinov Date: Thu, 5 Jul 2012 13:41:16 +0300 Subject: [PATCH 074/164] Bug #13889741: HANDLE_FATAL_SIGNAL IN _DB_ENTER_ | HANDLE_FATAL_SIGNAL IN STRNLEN Fixed the following bounds checking problems : 1. in check_if_legal_filename() make sure the null terminated string is long enough before accessing the bytes in it. Prevents pottential read-past-buffer-end 2. in my_wc_mb_filename() of the filename charset check for the end of the destination buffer before sending single byte characters into it. Prevents write-past-end-of-buffer (and garbaling stack in the cases reported here) errors. Added test cases. --- mysys/my_access.c | 3 ++- strings/ctype-utf8.c | 4 ++++ 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/mysys/my_access.c b/mysys/my_access.c index 210946d50a8..43917da7f98 100644 --- a/mysys/my_access.c +++ b/mysys/my_access.c @@ -148,7 +148,8 @@ static char reserved_map[256]= int check_if_legal_tablename(const char *name) { DBUG_ENTER("check_if_legal_tablename"); - DBUG_RETURN((reserved_map[(uchar) name[0]] & 1) && + DBUG_RETURN(name[0] != 0 && name[1] != 0 && + (reserved_map[(uchar) name[0]] & 1) && (reserved_map[(uchar) name[1]] & 2) && (reserved_map[(uchar) name[2]] & 4) && str_list_find(&reserved_names[1], name)); diff --git a/strings/ctype-utf8.c b/strings/ctype-utf8.c index 205f8c61ddd..a0e69feedab 100644 --- a/strings/ctype-utf8.c +++ b/strings/ctype-utf8.c @@ -4326,6 +4326,10 @@ my_wc_mb_filename(CHARSET_INFO *cs __attribute__((unused)), { int code; char hex[]= "0123456789abcdef"; + + if (s >= e) + return MY_CS_TOOSMALL; + if (wc < 128 && filename_safe_char[wc]) { *s= (uchar) wc; From e3c8fb4a1cf2984cf1aa1fe31ba828de550f619c Mon Sep 17 00:00:00 2001 From: Andrei Elkin Date: Thu, 5 Jul 2012 14:37:48 +0300 Subject: [PATCH 075/164] Bug#14275000 Fixes for BUG11761686 left a flaw that managed to slip away from testing. Only effective filtering branch was actually tested with a regression test added to rpl_filter_tables_not_exist. The reason of the failure is destuction of too early mem-root-allocated memory at the end of the deferred User-var's do_apply_event(). Fixed with bypassing free_root() in the deferred execution branch. Deallocation of created in do_apply_event() items is done by the base code through THD::cleanup_after_query() -> free_items() that the parent Query can't miss. sql/log_event.cc: Do not call free_root() in case the deferred User-var event. Necessary methods to the User-var class are added, do_apply_event() refined. sql/log_event.h: Necessary methods to avoid destoying mem-root-based memory at User-var applying are defined. --- sql/log_event.cc | 16 ++++++++++++---- sql/log_event.h | 11 ++++++++++- 2 files changed, 22 insertions(+), 5 deletions(-) diff --git a/sql/log_event.cc b/sql/log_event.cc index a47b3680d82..1822951cccf 100644 --- a/sql/log_event.cc +++ b/sql/log_event.cc @@ -5640,6 +5640,9 @@ User_var_log_event:: User_var_log_event(const char* buf, const Format_description_log_event* description_event) :Log_event(buf, description_event) +#ifndef MYSQL_CLIENT + , deferred(false) +#endif { /* The Post-Header is empty. The Variable Data part begins immediately. */ buf+= description_event->common_header_len + @@ -5848,7 +5851,10 @@ int User_var_log_event::do_apply_event(Relay_log_info const *rli) CHARSET_INFO *charset; if (rli->deferred_events_collecting) + { + set_deferred(); return rli->deferred_events->add(this); + } if (!(charset= get_charset(charset_number, MYF(MY_WME)))) return 1; @@ -5900,7 +5906,8 @@ int User_var_log_event::do_apply_event(Relay_log_info const *rli) return 0; } } - Item_func_set_user_var e(user_var_name, it); + + Item_func_set_user_var *e= new Item_func_set_user_var(user_var_name, it); /* Item_func_set_user_var can't substitute something else on its place => 0 can be passed as last argument (reference on item) @@ -5909,7 +5916,7 @@ int User_var_log_event::do_apply_event(Relay_log_info const *rli) crash the server, so if fix fields fails, we just return with an error. */ - if (e.fix_fields(thd, 0)) + if (e->fix_fields(thd, 0)) return 1; /* @@ -5917,8 +5924,9 @@ int User_var_log_event::do_apply_event(Relay_log_info const *rli) a single record and with a single column. Thus, like a column value, it could always have IMPLICIT derivation. */ - e.update_hash(val, val_len, type, charset, DERIVATION_IMPLICIT, 0); - free_root(thd->mem_root,0); + e->update_hash(val, val_len, type, charset, DERIVATION_IMPLICIT, 0); + if (!is_deferred()) + free_root(thd->mem_root,0); return 0; } diff --git a/sql/log_event.h b/sql/log_event.h index 39cd55f313e..e755b6a5a41 100644 --- a/sql/log_event.h +++ b/sql/log_event.h @@ -2483,11 +2483,13 @@ public: uint charset_number; bool is_null; #ifndef MYSQL_CLIENT + bool deferred; User_var_log_event(THD* thd_arg, char *name_arg, uint name_len_arg, char *val_arg, ulong val_len_arg, Item_result type_arg, uint charset_number_arg) :Log_event(), name(name_arg), name_len(name_len_arg), val(val_arg), - val_len(val_len_arg), type(type_arg), charset_number(charset_number_arg) + val_len(val_len_arg), type(type_arg), charset_number(charset_number_arg), + deferred(false) { is_null= !val; } void pack_info(Protocol* protocol); #else @@ -2500,6 +2502,13 @@ public: Log_event_type get_type_code() { return USER_VAR_EVENT;} #ifndef MYSQL_CLIENT bool write(IO_CACHE* file); + /* + Getter and setter for deferred User-event. + Returns true if the event is not applied directly + and which case the applier adjusts execution path. + */ + bool is_deferred() { return deferred; } + void set_deferred() { deferred= val; } #endif bool is_valid() const { return 1; } From ca2baa0f3b4cf4d52ce6d0791dcd5acf85889d6e Mon Sep 17 00:00:00 2001 From: Andrei Elkin Date: Thu, 5 Jul 2012 23:53:07 +0300 Subject: [PATCH 076/164] merge bug14275000 fixes to 5.5: sql/log_event.h. --- sql/log_event.h | 10 +--------- 1 file changed, 1 insertion(+), 9 deletions(-) diff --git a/sql/log_event.h b/sql/log_event.h index 387f020ee8b..000c7420ca8 100644 --- a/sql/log_event.h +++ b/sql/log_event.h @@ -2562,23 +2562,15 @@ public: Item_result type; uint charset_number; bool is_null; -<<<<<<< TREE uchar flags; #ifdef MYSQL_SERVER -======= -#ifndef MYSQL_CLIENT bool deferred; ->>>>>>> MERGE-SOURCE User_var_log_event(THD* thd_arg, char *name_arg, uint name_len_arg, char *val_arg, ulong val_len_arg, Item_result type_arg, uint charset_number_arg, uchar flags_arg) :Log_event(), name(name_arg), name_len(name_len_arg), val(val_arg), val_len(val_len_arg), type(type_arg), charset_number(charset_number_arg), -<<<<<<< TREE - flags(flags_arg) -======= - deferred(false) ->>>>>>> MERGE-SOURCE + flags(flags_arg), deferred(false) { is_null= !val; } void pack_info(Protocol* protocol); #else From aa103d02257be42caecdeffd87f684e1840f25dd Mon Sep 17 00:00:00 2001 From: unknown Date: Fri, 6 Jul 2012 15:30:53 +0300 Subject: [PATCH 077/164] From f01bbb4cac83d08dec93d6feefdaf8fb13a467b1 Mon Sep 17 00:00:00 2001 From: unknown Date: Fri, 6 Jul 2012 18:53:13 +0300 Subject: [PATCH 078/164] From a1425b103248672ecb966cfc0efb0ba17d6b1d19 Mon Sep 17 00:00:00 2001 From: Bjorn Munch Date: Mon, 9 Jul 2012 15:10:07 +0200 Subject: [PATCH 079/164] Refactor mysql_client_test.c into a framework part and a test part --- tests/Makefile.am | 1 + tests/mysql_client_fw.c | 1375 +++++++++++++++++++++++++++++++++++++ tests/mysql_client_test.c | 1358 +----------------------------------- 3 files changed, 1381 insertions(+), 1353 deletions(-) create mode 100644 tests/mysql_client_fw.c diff --git a/tests/Makefile.am b/tests/Makefile.am index 876db7e8475..4929fa7ba9b 100644 --- a/tests/Makefile.am +++ b/tests/Makefile.am @@ -47,6 +47,7 @@ LDADD = @CLIENT_EXTRA_LDFLAGS@ \ mysql_client_test_LDADD= $(LDADD) $(CXXLDFLAGS) mysql_client_test_SOURCES= mysql_client_test.c\ $(top_srcdir)/mysys/my_memmem.c +mysql_client_test.o: mysql_client_fw.c insert_test_SOURCES= insert_test.c select_test_SOURCES= select_test.c diff --git a/tests/mysql_client_fw.c b/tests/mysql_client_fw.c new file mode 100644 index 00000000000..27a06501d7a --- /dev/null +++ b/tests/mysql_client_fw.c @@ -0,0 +1,1375 @@ +/* Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; version 2 of the License. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ + +#include +#include +#include +#include +#include +#include +#include + +#define VER "2.1" +#define MAX_TEST_QUERY_LENGTH 300 /* MAX QUERY BUFFER LENGTH */ +#define MAX_KEY MAX_INDEXES +#define MAX_SERVER_ARGS 64 + +/* set default options */ +static int opt_testcase = 0; +static char *opt_db= 0; +static char *opt_user= 0; +static char *opt_password= 0; +static char *opt_host= 0; +static char *opt_unix_socket= 0; +#ifdef HAVE_SMEM +static char *shared_memory_base_name= 0; +#endif +static unsigned int opt_port; +static my_bool tty_password= 0, opt_silent= 0; + +static MYSQL *mysql= 0; +static char current_db[]= "client_test_db"; +static unsigned int test_count= 0; +static unsigned int opt_count= 0; +static unsigned int iter_count= 0; +static my_bool have_innodb= FALSE; + +static const char *opt_basedir= "./"; +static const char *opt_vardir= "mysql-test/var"; + +static longlong opt_getopt_ll_test= 0; + +static int embedded_server_arg_count= 0; +static char *embedded_server_args[MAX_SERVER_ARGS]; + +static const char *embedded_server_groups[]= { +"server", +"embedded", +"mysql_client_test_SERVER", +NullS +}; + +static time_t start_time, end_time; +static double total_time; + +const char *default_dbug_option= "d:t:o,/tmp/mysql_client_test.trace"; + +struct my_tests_st +{ +const char *name; +void (*function)(); +}; + +#define myheader(str) \ +DBUG_PRINT("test", ("name: %s", str)); \ + if (opt_silent < 2) \ + { \ + fprintf(stdout, "\n\n#####################################\n"); \ + fprintf(stdout, "%u of (%u/%u): %s", test_count++, iter_count, \ + opt_count, str); \ + fprintf(stdout, " \n#####################################\n"); \ + } + +#define myheader_r(str) \ +DBUG_PRINT("test", ("name: %s", str)); \ + if (!opt_silent) \ + { \ + fprintf(stdout, "\n\n#####################################\n"); \ + fprintf(stdout, "%s", str); \ + fprintf(stdout, " \n#####################################\n"); \ + } + +static void print_error(const char *msg); +static void print_st_error(MYSQL_STMT *stmt, const char *msg); +static void client_disconnect(MYSQL* mysql, my_bool drop_db); + + +/* +Abort unless given experssion is non-zero. + +SYNOPSIS +DIE_UNLESS(expr) + +DESCRIPTION +We can't use any kind of system assert as we need to +preserve tested invariants in release builds as well. +*/ + +#define DIE_UNLESS(expr) \ +((void) ((expr) ? 0 : (die(__FILE__, __LINE__, #expr), 0))) +#define DIE_IF(expr) \ +((void) ((expr) ? (die(__FILE__, __LINE__, #expr), 0) : 0)) +#define DIE(expr) \ +die(__FILE__, __LINE__, #expr) + +static void die(const char *file, int line, const char *expr) +{ + fflush(stdout); + fprintf(stderr, "%s:%d: check failed: '%s'\n", file, line, expr); + fflush(stderr); + exit(1); +} + + +#define myerror(msg) print_error(msg) +#define mysterror(stmt, msg) print_st_error(stmt, msg) + +#define myquery(RES) \ +{ \ + int r= (RES); \ + if (r) \ + myerror(NULL); \ + DIE_UNLESS(r == 0); \ +} + +#define myquery_r(r) \ +{ \ + if (r) \ + myerror(NULL); \ + DIE_UNLESS(r != 0); \ +} + +#define check_execute(stmt, r) \ +{ \ + if (r) \ + mysterror(stmt, NULL); \ + DIE_UNLESS(r == 0); \ +} + +#define check_execute_r(stmt, r) \ +{ \ + if (r) \ + mysterror(stmt, NULL); \ + DIE_UNLESS(r != 0); \ +} + +#define check_stmt(stmt) \ +{ \ + if ( stmt == 0) \ + myerror(NULL); \ + DIE_UNLESS(stmt != 0); \ +} + +#define check_stmt_r(stmt) \ +{ \ + if (stmt == 0) \ + myerror(NULL); \ + DIE_UNLESS(stmt == 0); \ +} + +#define mytest(x) if (!(x)) {myerror(NULL);DIE_UNLESS(FALSE);} +#define mytest_r(x) if ((x)) {myerror(NULL);DIE_UNLESS(FALSE);} + + +/* A workaround for Sun Forte 5.6 on Solaris x86 */ + +static int cmp_double(double *a, double *b) +{ + return *a == *b; +} + + +/* Print the error message */ + +static void print_error(const char *msg) +{ + if (!opt_silent) + { + if (mysql && mysql_errno(mysql)) + { + if (mysql->server_version) + fprintf(stdout, "\n [MySQL-%s]", mysql->server_version); + else + fprintf(stdout, "\n [MySQL]"); + fprintf(stdout, "[%d] %s\n", mysql_errno(mysql), mysql_error(mysql)); + } + else if (msg) + fprintf(stderr, " [MySQL] %s\n", msg); + } +} + + +static void print_st_error(MYSQL_STMT *stmt, const char *msg) +{ + if (!opt_silent) + { + if (stmt && mysql_stmt_errno(stmt)) + { + if (stmt->mysql && stmt->mysql->server_version) + fprintf(stdout, "\n [MySQL-%s]", stmt->mysql->server_version); + else + fprintf(stdout, "\n [MySQL]"); + + fprintf(stdout, "[%d] %s\n", mysql_stmt_errno(stmt), + mysql_stmt_error(stmt)); + } + else if (msg) + fprintf(stderr, " [MySQL] %s\n", msg); + } +} + +/* +Enhanced version of mysql_client_init(), which may also set shared memory +base on Windows. +*/ +static MYSQL *mysql_client_init(MYSQL* con) +{ + MYSQL* res = mysql_init(con); + #ifdef HAVE_SMEM + if (res && shared_memory_base_name) + mysql_options(res, MYSQL_SHARED_MEMORY_BASE_NAME, shared_memory_base_name); + #endif + return res; +} + +/* +Disable direct calls of mysql_init, as it disregards shared memory base. +*/ +#define mysql_init(A) Please use mysql_client_init instead of mysql_init + + +/* Check if the connection has InnoDB tables */ + +static my_bool check_have_innodb(MYSQL *conn) +{ + MYSQL_RES *res; + MYSQL_ROW row; + int rc; + my_bool result; + + rc= mysql_query(conn, "show variables like 'have_innodb'"); + myquery(rc); + res= mysql_use_result(conn); + DIE_UNLESS(res); + + row= mysql_fetch_row(res); + DIE_UNLESS(row); + + result= strcmp(row[1], "YES") == 0; + mysql_free_result(res); + return result; +} + + +/* +This is to be what mysql_query() is for mysql_real_query(), for +mysql_simple_prepare(): a variant without the 'length' parameter. +*/ + +static MYSQL_STMT *STDCALL +mysql_simple_prepare(MYSQL *mysql_arg, const char *query) +{ + MYSQL_STMT *stmt= mysql_stmt_init(mysql_arg); + if (stmt && mysql_stmt_prepare(stmt, query, (uint) strlen(query))) + { + mysql_stmt_close(stmt); + return 0; + } + return stmt; +} + + +/** +Connect to the server with options given by arguments to this application, +stored in global variables opt_host, opt_user, opt_password, opt_db, +opt_port and opt_unix_socket. + +@param flag[in] client_flag passed on to mysql_real_connect +@param protocol[in] MYSQL_PROTOCOL_* to use for this connection +@param auto_reconnect[in] set to 1 for auto reconnect + +@return pointer to initialized and connected MYSQL object +*/ +static MYSQL* client_connect(ulong flag, uint protocol, my_bool auto_reconnect) +{ + MYSQL* mysql; + int rc; + static char query[MAX_TEST_QUERY_LENGTH]; + myheader_r("client_connect"); + + if (!opt_silent) + fprintf(stdout, "\n Establishing a connection to '%s' ...", + opt_host ? opt_host : ""); + + if (!(mysql= mysql_client_init(NULL))) + { + opt_silent= 0; + myerror("mysql_client_init() failed"); + exit(1); + } + /* enable local infile, in non-binary builds often disabled by default */ + mysql_options(mysql, MYSQL_OPT_LOCAL_INFILE, 0); + mysql_options(mysql, MYSQL_OPT_PROTOCOL, &protocol); + + if (!(mysql_real_connect(mysql, opt_host, opt_user, + opt_password, opt_db ? opt_db:"test", opt_port, + opt_unix_socket, flag))) + { + opt_silent= 0; + myerror("connection failed"); + mysql_close(mysql); + fprintf(stdout, "\n Check the connection options using --help or -?\n"); + exit(1); + } + mysql->reconnect= auto_reconnect; + + if (!opt_silent) + fprintf(stdout, "OK"); + + /* set AUTOCOMMIT to ON*/ + mysql_autocommit(mysql, TRUE); + + if (!opt_silent) + { + fprintf(stdout, "\nConnected to MySQL server version: %s (%lu)\n", + mysql_get_server_info(mysql), + (ulong) mysql_get_server_version(mysql)); + fprintf(stdout, "\n Creating a test database '%s' ...", current_db); + } + strxmov(query, "CREATE DATABASE IF NOT EXISTS ", current_db, NullS); + + rc= mysql_query(mysql, query); + myquery(rc); + + strxmov(query, "USE ", current_db, NullS); + rc= mysql_query(mysql, query); + myquery(rc); + have_innodb= check_have_innodb(mysql); + + if (!opt_silent) + fprintf(stdout, "OK"); + + return mysql; +} + + +/* Close the connection */ + +static void client_disconnect(MYSQL* mysql, my_bool drop_db) +{ + static char query[MAX_TEST_QUERY_LENGTH]; + + myheader_r("client_disconnect"); + + if (mysql) + { + if (drop_db) + { + if (!opt_silent) + fprintf(stdout, "\n dropping the test database '%s' ...", current_db); + strxmov(query, "DROP DATABASE IF EXISTS ", current_db, NullS); + + mysql_query(mysql, query); + if (!opt_silent) + fprintf(stdout, "OK"); + } + + if (!opt_silent) + fprintf(stdout, "\n closing the connection ..."); + mysql_close(mysql); + if (!opt_silent) + fprintf(stdout, "OK\n"); + } +} + + +/* Print dashes */ + +static void my_print_dashes(MYSQL_RES *result) +{ + MYSQL_FIELD *field; + unsigned int i, j; + + mysql_field_seek(result, 0); + fputc('\t', stdout); + fputc('+', stdout); + + for(i= 0; i< mysql_num_fields(result); i++) + { + field= mysql_fetch_field(result); + for(j= 0; j < field->max_length+2; j++) + fputc('-', stdout); + fputc('+', stdout); + } + fputc('\n', stdout); +} + + +/* Print resultset metadata information */ + +static void my_print_result_metadata(MYSQL_RES *result) +{ + MYSQL_FIELD *field; + unsigned int i, j; + unsigned int field_count; + + mysql_field_seek(result, 0); + if (!opt_silent) + { + fputc('\n', stdout); + fputc('\n', stdout); + } + + field_count= mysql_num_fields(result); + for(i= 0; i< field_count; i++) + { + field= mysql_fetch_field(result); + j= strlen(field->name); + if (j < field->max_length) + j= field->max_length; + if (j < 4 && !IS_NOT_NULL(field->flags)) + j= 4; + field->max_length= j; + } + if (!opt_silent) + { + my_print_dashes(result); + fputc('\t', stdout); + fputc('|', stdout); + } + + mysql_field_seek(result, 0); + for(i= 0; i< field_count; i++) + { + field= mysql_fetch_field(result); + if (!opt_silent) + fprintf(stdout, " %-*s |", (int) field->max_length, field->name); + } + if (!opt_silent) + { + fputc('\n', stdout); + my_print_dashes(result); + } +} + + +/* Process the result set */ + +static int my_process_result_set(MYSQL_RES *result) +{ + MYSQL_ROW row; + MYSQL_FIELD *field; + unsigned int i; + unsigned int row_count= 0; + + if (!result) + return 0; + + my_print_result_metadata(result); + + while ((row= mysql_fetch_row(result)) != NULL) + { + mysql_field_seek(result, 0); + if (!opt_silent) + { + fputc('\t', stdout); + fputc('|', stdout); + } + + for(i= 0; i< mysql_num_fields(result); i++) + { + field= mysql_fetch_field(result); + if (!opt_silent) + { + if (row[i] == NULL) + fprintf(stdout, " %-*s |", (int) field->max_length, "NULL"); + else if (IS_NUM(field->type)) + fprintf(stdout, " %*s |", (int) field->max_length, row[i]); + else + fprintf(stdout, " %-*s |", (int) field->max_length, row[i]); + } + } + if (!opt_silent) + { + fputc('\t', stdout); + fputc('\n', stdout); + } + row_count++; + } + if (!opt_silent) + { + if (row_count) + my_print_dashes(result); + + if (mysql_errno(mysql) != 0) + fprintf(stderr, "\n\tmysql_fetch_row() failed\n"); + else + fprintf(stdout, "\n\t%d %s returned\n", row_count, + row_count == 1 ? "row" : "rows"); + } + return row_count; +} + + +static int my_process_result(MYSQL *mysql_arg) +{ + MYSQL_RES *result; + int row_count; + + if (!(result= mysql_store_result(mysql_arg))) + return 0; + + row_count= my_process_result_set(result); + + mysql_free_result(result); + return row_count; +} + + +/* Process the statement result set */ + +#define MAX_RES_FIELDS 50 +#define MAX_FIELD_DATA_SIZE 255 + +static int my_process_stmt_result(MYSQL_STMT *stmt) +{ + int field_count; + int row_count= 0; + MYSQL_BIND buffer[MAX_RES_FIELDS]; + MYSQL_FIELD *field; + MYSQL_RES *result; + char data[MAX_RES_FIELDS][MAX_FIELD_DATA_SIZE]; + ulong length[MAX_RES_FIELDS]; + my_bool is_null[MAX_RES_FIELDS]; + int rc, i; + + if (!(result= mysql_stmt_result_metadata(stmt))) /* No meta info */ + { + while (!mysql_stmt_fetch(stmt)) + row_count++; + return row_count; + } + + field_count= min(mysql_num_fields(result), MAX_RES_FIELDS); + + bzero((char*) buffer, sizeof(buffer)); + bzero((char*) length, sizeof(length)); + bzero((char*) is_null, sizeof(is_null)); + + for(i= 0; i < field_count; i++) + { + buffer[i].buffer_type= MYSQL_TYPE_STRING; + buffer[i].buffer_length= MAX_FIELD_DATA_SIZE; + buffer[i].length= &length[i]; + buffer[i].buffer= (void *) data[i]; + buffer[i].is_null= &is_null[i]; + } + + rc= mysql_stmt_bind_result(stmt, buffer); + check_execute(stmt, rc); + + rc= 1; + mysql_stmt_attr_set(stmt, STMT_ATTR_UPDATE_MAX_LENGTH, (void*)&rc); + rc= mysql_stmt_store_result(stmt); + check_execute(stmt, rc); + my_print_result_metadata(result); + + mysql_field_seek(result, 0); + while ((rc= mysql_stmt_fetch(stmt)) == 0) + { + if (!opt_silent) + { + fputc('\t', stdout); + fputc('|', stdout); + } + mysql_field_seek(result, 0); + for (i= 0; i < field_count; i++) + { + field= mysql_fetch_field(result); + if (!opt_silent) + { + if (is_null[i]) + fprintf(stdout, " %-*s |", (int) field->max_length, "NULL"); + else if (length[i] == 0) + { + data[i][0]= '\0'; /* unmodified buffer */ + fprintf(stdout, " %*s |", (int) field->max_length, data[i]); + } + else if (IS_NUM(field->type)) + fprintf(stdout, " %*s |", (int) field->max_length, data[i]); + else + fprintf(stdout, " %-*s |", (int) field->max_length, data[i]); + } + } + if (!opt_silent) + { + fputc('\t', stdout); + fputc('\n', stdout); + } + row_count++; + } + DIE_UNLESS(rc == MYSQL_NO_DATA); + if (!opt_silent) + { + if (row_count) + my_print_dashes(result); + fprintf(stdout, "\n\t%d %s returned\n", row_count, + row_count == 1 ? "row" : "rows"); + } + mysql_free_result(result); + return row_count; +} + + +/* Prepare statement, execute, and process result set for given query */ + +int my_stmt_result(const char *buff) +{ + MYSQL_STMT *stmt; + int row_count; + int rc; + + if (!opt_silent) + fprintf(stdout, "\n\n %s", buff); + stmt= mysql_simple_prepare(mysql, buff); + check_stmt(stmt); + + rc= mysql_stmt_execute(stmt); + check_execute(stmt, rc); + + row_count= my_process_stmt_result(stmt); + mysql_stmt_close(stmt); + + return row_count; +} + + +/* Utility function to verify a particular column data */ + +static void verify_col_data(const char *table, const char *col, +const char *exp_data) +{ + static char query[MAX_TEST_QUERY_LENGTH]; + MYSQL_RES *result; + MYSQL_ROW row; + int rc, field= 1; + + if (table && col) + { + strxmov(query, "SELECT ", col, " FROM ", table, " LIMIT 1", NullS); + if (!opt_silent) + fprintf(stdout, "\n %s", query); + rc= mysql_query(mysql, query); + myquery(rc); + + field= 0; + } + + result= mysql_use_result(mysql); + mytest(result); + + if (!(row= mysql_fetch_row(result)) || !row[field]) + { + fprintf(stdout, "\n *** ERROR: FAILED TO GET THE RESULT ***"); + exit(1); + } + if (strcmp(row[field], exp_data)) + { + fprintf(stdout, "\n obtained: `%s` (expected: `%s`)", + row[field], exp_data); + DIE_UNLESS(FALSE); + } + mysql_free_result(result); +} + + +/* Utility function to verify the field members */ + +#define verify_prepare_field(result,no,name,org_name,type,table, \ +org_table,db,length,def) \ +do_verify_prepare_field((result),(no),(name),(org_name),(type), \ +(table),(org_table),(db),(length),(def), \ +__FILE__, __LINE__) + +static void do_verify_prepare_field(MYSQL_RES *result, +unsigned int no, const char *name, +const char *org_name, +enum enum_field_types type, +const char *table, +const char *org_table, const char *db, +unsigned long length, const char *def, +const char *file, int line) +{ + MYSQL_FIELD *field; + CHARSET_INFO *cs; + ulonglong expected_field_length; + + if (!(field= mysql_fetch_field_direct(result, no))) + { + fprintf(stdout, "\n *** ERROR: FAILED TO GET THE RESULT ***"); + exit(1); + } + cs= get_charset(field->charsetnr, 0); + DIE_UNLESS(cs); + if ((expected_field_length= length * cs->mbmaxlen) > UINT_MAX32) + expected_field_length= UINT_MAX32; + if (!opt_silent) + { + fprintf(stdout, "\n field[%d]:", no); + fprintf(stdout, "\n name :`%s`\t(expected: `%s`)", field->name, name); + fprintf(stdout, "\n org_name :`%s`\t(expected: `%s`)", + field->org_name, org_name); + fprintf(stdout, "\n type :`%d`\t(expected: `%d`)", field->type, type); + if (table) + fprintf(stdout, "\n table :`%s`\t(expected: `%s`)", + field->table, table); + if (org_table) + fprintf(stdout, "\n org_table:`%s`\t(expected: `%s`)", + field->org_table, org_table); + fprintf(stdout, "\n database :`%s`\t(expected: `%s`)", field->db, db); + fprintf(stdout, "\n length :`%lu`\t(expected: `%llu`)", + field->length, expected_field_length); + fprintf(stdout, "\n maxlength:`%ld`", field->max_length); + fprintf(stdout, "\n charsetnr:`%d`", field->charsetnr); + fprintf(stdout, "\n default :`%s`\t(expected: `%s`)", + field->def ? field->def : "(null)", def ? def: "(null)"); + fprintf(stdout, "\n"); + } + DIE_UNLESS(strcmp(field->name, name) == 0); + DIE_UNLESS(strcmp(field->org_name, org_name) == 0); + /* + XXX: silent column specification change works based on number of + bytes a column occupies. So CHAR -> VARCHAR upgrade is possible even + for CHAR(2) column if its character set is multibyte. + VARCHAR -> CHAR downgrade won't work for VARCHAR(3) as one would + expect. + */ + if (cs->mbmaxlen == 1) + { + if (field->type != type) + { + fprintf(stderr, + "Expected field type: %d, got type: %d in file %s, line %d\n", + (int) type, (int) field->type, file, line); + DIE_UNLESS(field->type == type); + } + } + if (table) + DIE_UNLESS(strcmp(field->table, table) == 0); + if (org_table) + DIE_UNLESS(strcmp(field->org_table, org_table) == 0); + DIE_UNLESS(strcmp(field->db, db) == 0); + /* + Character set should be taken into account for multibyte encodings, such + as utf8. Field length is calculated as number of characters * maximum + number of bytes a character can occupy. + */ + if (length && (field->length != expected_field_length)) + { + fprintf(stderr, "Expected field length: %llu, got length: %lu\n", + expected_field_length, field->length); + DIE_UNLESS(field->length == expected_field_length); + } + if (def) + DIE_UNLESS(strcmp(field->def, def) == 0); +} + + +/* Utility function to verify the parameter count */ + +static void verify_param_count(MYSQL_STMT *stmt, long exp_count) +{ + long param_count= mysql_stmt_param_count(stmt); + if (!opt_silent) + fprintf(stdout, "\n total parameters in stmt: `%ld` (expected: `%ld`)", + param_count, exp_count); + DIE_UNLESS(param_count == exp_count); +} + + +/* Utility function to verify the total affected rows */ + +static void verify_st_affected_rows(MYSQL_STMT *stmt, ulonglong exp_count) +{ + ulonglong affected_rows= mysql_stmt_affected_rows(stmt); + if (!opt_silent) + fprintf(stdout, "\n total affected rows: `%ld` (expected: `%ld`)", + (long) affected_rows, (long) exp_count); + DIE_UNLESS(affected_rows == exp_count); +} + + +/* Utility function to verify the total affected rows */ + +static void verify_affected_rows(ulonglong exp_count) +{ + ulonglong affected_rows= mysql_affected_rows(mysql); + if (!opt_silent) + fprintf(stdout, "\n total affected rows: `%ld` (expected: `%ld`)", + (long) affected_rows, (long) exp_count); + DIE_UNLESS(affected_rows == exp_count); +} + + +/* Utility function to verify the total fields count */ + +static void verify_field_count(MYSQL_RES *result, uint exp_count) +{ + uint field_count= mysql_num_fields(result); + if (!opt_silent) + fprintf(stdout, "\n total fields in the result set: `%d` (expected: `%d`)", + field_count, exp_count); + DIE_UNLESS(field_count == exp_count); +} + + +/* Utility function to execute a query using prepare-execute */ + +#ifndef EMBEDDED_LIBRARY +static void execute_prepare_query(const char *query, ulonglong exp_count) +{ + MYSQL_STMT *stmt; + ulonglong affected_rows; + int rc; + + stmt= mysql_simple_prepare(mysql, query); + check_stmt(stmt); + + rc= mysql_stmt_execute(stmt); + myquery(rc); + + affected_rows= mysql_stmt_affected_rows(stmt); + if (!opt_silent) + fprintf(stdout, "\n total affected rows: `%ld` (expected: `%ld`)", + (long) affected_rows, (long) exp_count); + + DIE_UNLESS(affected_rows == exp_count); + mysql_stmt_close(stmt); +} +#endif + +/* +Accepts arbitrary number of queries and runs them against the database. +Used to fill tables for each test. +*/ + +void fill_tables(const char **query_list, unsigned query_count) +{ + int rc; + const char **query; + DBUG_ENTER("fill_tables"); + for (query= query_list; query < query_list + query_count; + ++query) + { + rc= mysql_query(mysql, *query); + myquery(rc); + } + DBUG_VOID_RETURN; +} + +/* +All state of fetch from one statement: statement handle, out buffers, +fetch position. +See fetch_n for for the only use case. +*/ + +enum { MAX_COLUMN_LENGTH= 255 }; + +typedef struct st_stmt_fetch +{ +const char *query; +unsigned stmt_no; +MYSQL_STMT *handle; +my_bool is_open; +MYSQL_BIND *bind_array; +char **out_data; +unsigned long *out_data_length; +unsigned column_count; +unsigned row_count; +} Stmt_fetch; + + +/* +Create statement handle, prepare it with statement, execute and allocate +fetch buffers. +*/ + +void stmt_fetch_init(Stmt_fetch *fetch, unsigned stmt_no_arg, +const char *query_arg) +{ + unsigned long type= CURSOR_TYPE_READ_ONLY; + int rc; + unsigned i; + MYSQL_RES *metadata; + DBUG_ENTER("stmt_fetch_init"); + + /* Save query and statement number for error messages */ + fetch->stmt_no= stmt_no_arg; + fetch->query= query_arg; + + fetch->handle= mysql_stmt_init(mysql); + + rc= mysql_stmt_prepare(fetch->handle, fetch->query, strlen(fetch->query)); + check_execute(fetch->handle, rc); + + /* + The attribute is sent to server on execute and asks to open read-only + for result set + */ + mysql_stmt_attr_set(fetch->handle, STMT_ATTR_CURSOR_TYPE, + (const void*) &type); + + rc= mysql_stmt_execute(fetch->handle); + check_execute(fetch->handle, rc); + + /* Find out total number of columns in result set */ + metadata= mysql_stmt_result_metadata(fetch->handle); + fetch->column_count= mysql_num_fields(metadata); + mysql_free_result(metadata); + + /* + Now allocate bind handles and buffers for output data: + calloc memory to reduce number of MYSQL_BIND members we need to + set up. + */ + + fetch->bind_array= (MYSQL_BIND *) calloc(1, sizeof(MYSQL_BIND) * + fetch->column_count); + fetch->out_data= (char**) calloc(1, sizeof(char*) * fetch->column_count); + fetch->out_data_length= (ulong*) calloc(1, sizeof(ulong) * + fetch->column_count); + for (i= 0; i < fetch->column_count; ++i) + { + fetch->out_data[i]= (char*) calloc(1, MAX_COLUMN_LENGTH); + fetch->bind_array[i].buffer_type= MYSQL_TYPE_STRING; + fetch->bind_array[i].buffer= fetch->out_data[i]; + fetch->bind_array[i].buffer_length= MAX_COLUMN_LENGTH; + fetch->bind_array[i].length= fetch->out_data_length + i; + } + + mysql_stmt_bind_result(fetch->handle, fetch->bind_array); + + fetch->row_count= 0; + fetch->is_open= TRUE; + + /* Ready for reading rows */ + DBUG_VOID_RETURN; +} + + +/* Fetch and print one row from cursor */ + +int stmt_fetch_fetch_row(Stmt_fetch *fetch) +{ + int rc; + unsigned i; + DBUG_ENTER("stmt_fetch_fetch_row"); + + if ((rc= mysql_stmt_fetch(fetch->handle)) == 0) + { + ++fetch->row_count; + if (!opt_silent) + printf("Stmt %d fetched row %d:\n", fetch->stmt_no, fetch->row_count); + for (i= 0; i < fetch->column_count; ++i) + { + fetch->out_data[i][fetch->out_data_length[i]]= '\0'; + if (!opt_silent) + printf("column %d: %s\n", i+1, fetch->out_data[i]); + } + } + else + fetch->is_open= FALSE; + DBUG_RETURN(rc); +} + + +void stmt_fetch_close(Stmt_fetch *fetch) +{ + unsigned i; + DBUG_ENTER("stmt_fetch_close"); + + for (i= 0; i < fetch->column_count; ++i) + free(fetch->out_data[i]); + free(fetch->out_data); + free(fetch->out_data_length); + free(fetch->bind_array); + mysql_stmt_close(fetch->handle); + DBUG_VOID_RETURN; +} + +/* +For given array of queries, open query_count cursors and fetch +from them in simultaneous manner. +In case there was an error in one of the cursors, continue +reading from the rest. +*/ + +enum fetch_type { USE_ROW_BY_ROW_FETCH= 0, USE_STORE_RESULT= 1 }; + +my_bool fetch_n(const char **query_list, unsigned query_count, +enum fetch_type fetch_type) +{ + unsigned open_statements= query_count; + int rc, error_count= 0; + Stmt_fetch *fetch_array= (Stmt_fetch*) calloc(1, sizeof(Stmt_fetch) * + query_count); + Stmt_fetch *fetch; + DBUG_ENTER("fetch_n"); + + for (fetch= fetch_array; fetch < fetch_array + query_count; ++fetch) + { + /* Init will exit(1) in case of error */ + stmt_fetch_init(fetch, fetch - fetch_array, + query_list[fetch - fetch_array]); + } + + if (fetch_type == USE_STORE_RESULT) + { + for (fetch= fetch_array; fetch < fetch_array + query_count; ++fetch) + { + rc= mysql_stmt_store_result(fetch->handle); + check_execute(fetch->handle, rc); + } + } + + while (open_statements) + { + for (fetch= fetch_array; fetch < fetch_array + query_count; ++fetch) + { + if (fetch->is_open && (rc= stmt_fetch_fetch_row(fetch))) + { + open_statements--; + /* + We try to fetch from the rest of the statements in case of + error + */ + if (rc != MYSQL_NO_DATA) + { + fprintf(stderr, + "Got error reading rows from statement %d,\n" + "query is: %s,\n" + "error message: %s", (int) (fetch - fetch_array), + fetch->query, + mysql_stmt_error(fetch->handle)); + error_count++; + } + } + } + } + if (error_count) + fprintf(stderr, "Fetch FAILED"); + else + { + unsigned total_row_count= 0; + for (fetch= fetch_array; fetch < fetch_array + query_count; ++fetch) + total_row_count+= fetch->row_count; + if (!opt_silent) + printf("Success, total rows fetched: %d\n", total_row_count); + } + for (fetch= fetch_array; fetch < fetch_array + query_count; ++fetch) + stmt_fetch_close(fetch); + free(fetch_array); + DBUG_RETURN(error_count != 0); +} + +/* Separate thread query to test some cases */ + +static my_bool thread_query(const char *query) +{ + MYSQL *l_mysql; + my_bool error; + + error= 0; + if (!opt_silent) + fprintf(stdout, "\n in thread_query(%s)", query); + if (!(l_mysql= mysql_client_init(NULL))) + { + myerror("mysql_client_init() failed"); + return 1; + } + if (!(mysql_real_connect(l_mysql, opt_host, opt_user, + opt_password, current_db, opt_port, + opt_unix_socket, 0))) + { + myerror("connection failed"); + error= 1; + goto end; + } + l_mysql->reconnect= 1; + if (mysql_query(l_mysql, query)) + { + fprintf(stderr, "Query failed (%s)\n", mysql_error(l_mysql)); + error= 1; + goto end; + } + mysql_commit(l_mysql); + end: + mysql_close(l_mysql); + return error; +} + + +/* +Read and parse arguments and MySQL options from my.cnf +*/ + +static const char *client_test_load_default_groups[]= { "client", 0 }; +static char **defaults_argv; + +static struct my_option client_test_long_options[] = +{ +{"basedir", 'b', "Basedir for tests.", &opt_basedir, + &opt_basedir, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0}, +{"count", 't', "Number of times test to be executed", &opt_count, + &opt_count, 0, GET_UINT, REQUIRED_ARG, 1, 0, 0, 0, 0, 0}, +{"database", 'D', "Database to use", &opt_db, &opt_db, + 0, GET_STR_ALLOC, REQUIRED_ARG, 0, 0, 0, 0, 0, 0}, +{"debug", '#', "Output debug log", &default_dbug_option, + &default_dbug_option, 0, GET_STR, OPT_ARG, 0, 0, 0, 0, 0, 0}, +{"help", '?', "Display this help and exit", 0, 0, 0, GET_NO_ARG, NO_ARG, 0, + 0, 0, 0, 0, 0}, +{"host", 'h', "Connect to host", &opt_host, &opt_host, + 0, GET_STR_ALLOC, REQUIRED_ARG, 0, 0, 0, 0, 0, 0}, +{"password", 'p', + "Password to use when connecting to server. If password is not given it's asked from the tty.", + 0, 0, 0, GET_STR, OPT_ARG, 0, 0, 0, 0, 0, 0}, +{"port", 'P', "Port number to use for connection or 0 for default to, in " + "order of preference, my.cnf, $MYSQL_TCP_PORT, " + #if MYSQL_PORT_DEFAULT == 0 + "/etc/services, " + #endif + "built-in default (" STRINGIFY_ARG(MYSQL_PORT) ").", + &opt_port, &opt_port, 0, GET_UINT, REQUIRED_ARG, 0, 0, 0, 0, 0, 0}, +{"server-arg", 'A', "Send embedded server this as a parameter.", + 0, 0, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0}, +{"show-tests", 'T', "Show all tests' names", 0, 0, 0, GET_NO_ARG, NO_ARG, + 0, 0, 0, 0, 0, 0}, +{"silent", 's', "Be more silent", 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, + 0}, +#ifdef HAVE_SMEM +{"shared-memory-base-name", 'm', "Base name of shared memory.", + &shared_memory_base_name, (uchar**)&shared_memory_base_name, 0, + GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0}, +#endif +{"socket", 'S', "Socket file to use for connection", + &opt_unix_socket, &opt_unix_socket, 0, GET_STR, + REQUIRED_ARG, 0, 0, 0, 0, 0, 0}, +{"testcase", 'c', + "May disable some code when runs as mysql-test-run testcase.", + 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0}, +#ifndef DONT_ALLOW_USER_CHANGE +{"user", 'u', "User for login if not current user", &opt_user, + &opt_user, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0}, +#endif +{"vardir", 'v', "Data dir for tests.", &opt_vardir, + &opt_vardir, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0}, +{"getopt-ll-test", 'g', "Option for testing bug in getopt library", + &opt_getopt_ll_test, &opt_getopt_ll_test, 0, + GET_LL, REQUIRED_ARG, 0, 0, LONGLONG_MAX, 0, 0, 0}, +{ 0, 0, 0, 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0} +}; + + +static void usage(void) +{ +/* show the usage string when the user asks for this */ + putc('\n', stdout); + printf("%s Ver %s Distrib %s, for %s (%s)\n", + my_progname, VER, MYSQL_SERVER_VERSION, SYSTEM_TYPE, MACHINE_TYPE); + puts("By Monty, Venu, Kent and others\n"); + printf("\ +Copyright (C) 2002-2004 MySQL AB\n\ +This software comes with ABSOLUTELY NO WARRANTY. This is free software,\n\ +and you are welcome to modify and redistribute it under the GPL license\n"); + printf("Usage: %s [OPTIONS] [TESTNAME1 TESTNAME2...]\n", my_progname); + my_print_help(client_test_long_options); + print_defaults("my", client_test_load_default_groups); + my_print_variables(client_test_long_options); +} + + +struct my_tests_st *get_my_tests(); /* Will be defined in main .c file */ + +static struct my_tests_st *my_testlist= 0; + +static my_bool +get_one_option(int optid, const struct my_option *opt __attribute__((unused)), +char *argument) +{ + switch (optid) { + case '#': + DBUG_PUSH(argument ? argument : default_dbug_option); + break; + case 'c': + opt_testcase = 1; + break; + case 'p': + if (argument) + { + char *start=argument; + my_free(opt_password, MYF(MY_ALLOW_ZERO_PTR)); + opt_password= my_strdup(argument, MYF(MY_FAE)); + while (*argument) *argument++= 'x'; /* Destroy argument */ + if (*start) + start[1]=0; + } + else + tty_password= 1; + break; + case 's': + if (argument == disabled_my_option) + opt_silent= 0; + else + opt_silent++; + break; + case 'A': + /* + When the embedded server is being tested, the test suite needs to be + able to pass command-line arguments to the embedded server so it can + locate the language files and data directory. The test suite + (mysql-test-run) never uses config files, just command-line options. + */ + if (!embedded_server_arg_count) + { + embedded_server_arg_count= 1; + embedded_server_args[0]= (char*) ""; + } + if (embedded_server_arg_count == MAX_SERVER_ARGS-1 || + !(embedded_server_args[embedded_server_arg_count++]= + my_strdup(argument, MYF(MY_FAE)))) + { + DIE("Can't use server argument"); + } + break; + case 'T': + { + struct my_tests_st *fptr; + + printf("All possible test names:\n\n"); + for (fptr= my_testlist; fptr->name; fptr++) + printf("%s\n", fptr->name); + exit(0); + break; + } + case '?': + case 'I': /* Info */ + usage(); + exit(0); + break; + } + return 0; +} + +static void get_options(int *argc, char ***argv) +{ + int ho_error; + + if ((ho_error= handle_options(argc, argv, client_test_long_options, + get_one_option))) + exit(ho_error); + + if (tty_password) + opt_password= get_tty_password(NullS); + return; +} + +/* +Print the test output on successful execution before exiting +*/ + +static void print_test_output() +{ + if (opt_silent < 3) + { + fprintf(stdout, "\n\n"); + fprintf(stdout, "All '%d' tests were successful (in '%d' iterations)", + test_count-1, opt_count); + fprintf(stdout, "\n Total execution time: %g SECS", total_time); + if (opt_count > 1) + fprintf(stdout, " (Avg: %g SECS)", total_time/opt_count); + + fprintf(stdout, "\n\n!!! SUCCESS !!!\n"); + } +} + +/*************************************************************************** +main routine +***************************************************************************/ + + +int main(int argc, char **argv) +{ + struct my_tests_st *fptr; + my_testlist= get_my_tests(); + + MY_INIT(argv[0]); + + load_defaults("my", client_test_load_default_groups, &argc, &argv); + defaults_argv= argv; + get_options(&argc, &argv); + + if (mysql_server_init(embedded_server_arg_count, + embedded_server_args, + (char**) embedded_server_groups)) + DIE("Can't initialize MySQL server"); + + /* connect to server with no flags, default protocol, auto reconnect true */ + mysql= client_connect(0, MYSQL_PROTOCOL_DEFAULT, 1); + + total_time= 0; + for (iter_count= 1; iter_count <= opt_count; iter_count++) + { + /* Start of tests */ + test_count= 1; + start_time= time((time_t *)0); + if (!argc) + { + for (fptr= my_testlist; fptr->name; fptr++) + (*fptr->function)(); + } + else + { + for ( ; *argv ; argv++) + { + for (fptr= my_testlist; fptr->name; fptr++) + { + if (!strcmp(fptr->name, *argv)) + { + (*fptr->function)(); + break; + } + } + if (!fptr->name) + { + fprintf(stderr, "\n\nGiven test not found: '%s'\n", *argv); + fprintf(stderr, "See legal test names with %s -T\n\nAborting!\n", + my_progname); + client_disconnect(mysql, 1); + free_defaults(defaults_argv); + exit(1); + } + } + } + + end_time= time((time_t *)0); + total_time+= difftime(end_time, start_time); + + /* End of tests */ + } + + client_disconnect(mysql, 1); /* disconnect from server */ + + free_defaults(defaults_argv); + print_test_output(); + + while (embedded_server_arg_count > 1) + my_free(embedded_server_args[--embedded_server_arg_count],MYF(0)); + + mysql_server_end(); + + my_end(0); + + exit(0); +} diff --git a/tests/mysql_client_test.c b/tests/mysql_client_test.c index f553eb530ae..c38695db1b1 100644 --- a/tests/mysql_client_test.c +++ b/tests/mysql_client_test.c @@ -1,4 +1,4 @@ -/* Copyright (c) 2002, 2011, Oracle and/or its affiliates. All rights reserved. +/* Copyright (c) 2002, 2012, Oracle and/or its affiliates. All rights reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -25,378 +25,12 @@ DOESN'T CONTAIN WARNINGS/ERRORS BEFORE YOU PUSH. */ - -#include -#include -#include -#include -#include -#include -#include - -#define VER "2.1" -#define MAX_TEST_QUERY_LENGTH 300 /* MAX QUERY BUFFER LENGTH */ -#define MAX_KEY MAX_INDEXES -#define MAX_SERVER_ARGS 64 - -/* set default options */ -static int opt_testcase = 0; -static char *opt_db= 0; -static char *opt_user= 0; -static char *opt_password= 0; -static char *opt_host= 0; -static char *opt_unix_socket= 0; -#ifdef HAVE_SMEM -static char *shared_memory_base_name= 0; -#endif -static unsigned int opt_port; -static my_bool tty_password= 0, opt_silent= 0; - -static MYSQL *mysql= 0; -static char current_db[]= "client_test_db"; -static unsigned int test_count= 0; -static unsigned int opt_count= 0; -static unsigned int iter_count= 0; -static my_bool have_innodb= FALSE; - -static const char *opt_basedir= "./"; -static const char *opt_vardir= "mysql-test/var"; - -static longlong opt_getopt_ll_test= 0; - -static int embedded_server_arg_count= 0; -static char *embedded_server_args[MAX_SERVER_ARGS]; - -static const char *embedded_server_groups[]= { - "server", - "embedded", - "mysql_client_test_SERVER", - NullS -}; - -static time_t start_time, end_time; -static double total_time; - -const char *default_dbug_option= "d:t:o,/tmp/mysql_client_test.trace"; - -struct my_tests_st -{ - const char *name; - void (*function)(); -}; - -#define myheader(str) \ -DBUG_PRINT("test", ("name: %s", str)); \ -if (opt_silent < 2) \ -{ \ - fprintf(stdout, "\n\n#####################################\n"); \ - fprintf(stdout, "%u of (%u/%u): %s", test_count++, iter_count, \ - opt_count, str); \ - fprintf(stdout, " \n#####################################\n"); \ -} - -#define myheader_r(str) \ -DBUG_PRINT("test", ("name: %s", str)); \ -if (!opt_silent) \ -{ \ - fprintf(stdout, "\n\n#####################################\n"); \ - fprintf(stdout, "%s", str); \ - fprintf(stdout, " \n#####################################\n"); \ -} - -static void print_error(const char *msg); -static void print_st_error(MYSQL_STMT *stmt, const char *msg); -static void client_disconnect(MYSQL* mysql, my_bool drop_db); - - /* - Abort unless given experssion is non-zero. - - SYNOPSIS - DIE_UNLESS(expr) - - DESCRIPTION - We can't use any kind of system assert as we need to - preserve tested invariants in release builds as well. + The fw.c file includes all the mysql_client_test framework; this file + contains only the actual tests, plus the list of test functions to call. */ -#define DIE_UNLESS(expr) \ - ((void) ((expr) ? 0 : (die(__FILE__, __LINE__, #expr), 0))) -#define DIE_IF(expr) \ - ((void) ((expr) ? (die(__FILE__, __LINE__, #expr), 0) : 0)) -#define DIE(expr) \ - die(__FILE__, __LINE__, #expr) - -static void die(const char *file, int line, const char *expr) -{ - fflush(stdout); - fprintf(stderr, "%s:%d: check failed: '%s'\n", file, line, expr); - fflush(stderr); - exit(1); -} - - -#define myerror(msg) print_error(msg) -#define mysterror(stmt, msg) print_st_error(stmt, msg) - -#define myquery(RES) \ -{ \ - int r= (RES); \ - if (r) \ - myerror(NULL); \ - DIE_UNLESS(r == 0); \ -} - -#define myquery_r(r) \ -{ \ -if (r) \ - myerror(NULL); \ -DIE_UNLESS(r != 0); \ -} - -#define check_execute(stmt, r) \ -{ \ -if (r) \ - mysterror(stmt, NULL); \ -DIE_UNLESS(r == 0);\ -} - -#define check_execute_r(stmt, r) \ -{ \ -if (r) \ - mysterror(stmt, NULL); \ -DIE_UNLESS(r != 0);\ -} - -#define check_stmt(stmt) \ -{ \ -if ( stmt == 0) \ - myerror(NULL); \ -DIE_UNLESS(stmt != 0); \ -} - -#define check_stmt_r(stmt) \ -{ \ -if (stmt == 0) \ - myerror(NULL);\ -DIE_UNLESS(stmt == 0);\ -} - -#define mytest(x) if (!(x)) {myerror(NULL);DIE_UNLESS(FALSE);} -#define mytest_r(x) if ((x)) {myerror(NULL);DIE_UNLESS(FALSE);} - - -/* A workaround for Sun Forte 5.6 on Solaris x86 */ - -static int cmp_double(double *a, double *b) -{ - return *a == *b; -} - - -/* Print the error message */ - -static void print_error(const char *msg) -{ - if (!opt_silent) - { - if (mysql && mysql_errno(mysql)) - { - if (mysql->server_version) - fprintf(stdout, "\n [MySQL-%s]", mysql->server_version); - else - fprintf(stdout, "\n [MySQL]"); - fprintf(stdout, "[%d] %s\n", mysql_errno(mysql), mysql_error(mysql)); - } - else if (msg) - fprintf(stderr, " [MySQL] %s\n", msg); - } -} - - -static void print_st_error(MYSQL_STMT *stmt, const char *msg) -{ - if (!opt_silent) - { - if (stmt && mysql_stmt_errno(stmt)) - { - if (stmt->mysql && stmt->mysql->server_version) - fprintf(stdout, "\n [MySQL-%s]", stmt->mysql->server_version); - else - fprintf(stdout, "\n [MySQL]"); - - fprintf(stdout, "[%d] %s\n", mysql_stmt_errno(stmt), - mysql_stmt_error(stmt)); - } - else if (msg) - fprintf(stderr, " [MySQL] %s\n", msg); - } -} - -/* - Enhanced version of mysql_client_init(), which may also set shared memory - base on Windows. -*/ -static MYSQL *mysql_client_init(MYSQL* con) -{ - MYSQL* res = mysql_init(con); -#ifdef HAVE_SMEM - if (res && shared_memory_base_name) - mysql_options(res, MYSQL_SHARED_MEMORY_BASE_NAME, shared_memory_base_name); -#endif - return res; -} - -/* - Disable direct calls of mysql_init, as it disregards shared memory base. -*/ -#define mysql_init(A) Please use mysql_client_init instead of mysql_init - - -/* Check if the connection has InnoDB tables */ - -static my_bool check_have_innodb(MYSQL *conn) -{ - MYSQL_RES *res; - MYSQL_ROW row; - int rc; - my_bool result; - - rc= mysql_query(conn, "show variables like 'have_innodb'"); - myquery(rc); - res= mysql_use_result(conn); - DIE_UNLESS(res); - - row= mysql_fetch_row(res); - DIE_UNLESS(row); - - result= strcmp(row[1], "YES") == 0; - mysql_free_result(res); - return result; -} - - -/* - This is to be what mysql_query() is for mysql_real_query(), for - mysql_simple_prepare(): a variant without the 'length' parameter. -*/ - -static MYSQL_STMT *STDCALL -mysql_simple_prepare(MYSQL *mysql_arg, const char *query) -{ - MYSQL_STMT *stmt= mysql_stmt_init(mysql_arg); - if (stmt && mysql_stmt_prepare(stmt, query, (uint) strlen(query))) - { - mysql_stmt_close(stmt); - return 0; - } - return stmt; -} - - -/** - Connect to the server with options given by arguments to this application, - stored in global variables opt_host, opt_user, opt_password, opt_db, - opt_port and opt_unix_socket. - - @param flag[in] client_flag passed on to mysql_real_connect - @param protocol[in] MYSQL_PROTOCOL_* to use for this connection - @param auto_reconnect[in] set to 1 for auto reconnect - - @return pointer to initialized and connected MYSQL object -*/ -static MYSQL* client_connect(ulong flag, uint protocol, my_bool auto_reconnect) -{ - MYSQL* mysql; - int rc; - static char query[MAX_TEST_QUERY_LENGTH]; - myheader_r("client_connect"); - - if (!opt_silent) - fprintf(stdout, "\n Establishing a connection to '%s' ...", - opt_host ? opt_host : ""); - - if (!(mysql= mysql_client_init(NULL))) - { - opt_silent= 0; - myerror("mysql_client_init() failed"); - exit(1); - } - /* enable local infile, in non-binary builds often disabled by default */ - mysql_options(mysql, MYSQL_OPT_LOCAL_INFILE, 0); - mysql_options(mysql, MYSQL_OPT_PROTOCOL, &protocol); - - if (!(mysql_real_connect(mysql, opt_host, opt_user, - opt_password, opt_db ? opt_db:"test", opt_port, - opt_unix_socket, flag))) - { - opt_silent= 0; - myerror("connection failed"); - mysql_close(mysql); - fprintf(stdout, "\n Check the connection options using --help or -?\n"); - exit(1); - } - mysql->reconnect= auto_reconnect; - - if (!opt_silent) - fprintf(stdout, "OK"); - - /* set AUTOCOMMIT to ON*/ - mysql_autocommit(mysql, TRUE); - - if (!opt_silent) - { - fprintf(stdout, "\nConnected to MySQL server version: %s (%lu)\n", - mysql_get_server_info(mysql), - (ulong) mysql_get_server_version(mysql)); - fprintf(stdout, "\n Creating a test database '%s' ...", current_db); - } - strxmov(query, "CREATE DATABASE IF NOT EXISTS ", current_db, NullS); - - rc= mysql_query(mysql, query); - myquery(rc); - - strxmov(query, "USE ", current_db, NullS); - rc= mysql_query(mysql, query); - myquery(rc); - have_innodb= check_have_innodb(mysql); - - if (!opt_silent) - fprintf(stdout, "OK"); - - return mysql; -} - - -/* Close the connection */ - -static void client_disconnect(MYSQL* mysql, my_bool drop_db) -{ - static char query[MAX_TEST_QUERY_LENGTH]; - - myheader_r("client_disconnect"); - - if (mysql) - { - if (drop_db) - { - if (!opt_silent) - fprintf(stdout, "\n dropping the test database '%s' ...", current_db); - strxmov(query, "DROP DATABASE IF EXISTS ", current_db, NullS); - - mysql_query(mysql, query); - if (!opt_silent) - fprintf(stdout, "OK"); - } - - if (!opt_silent) - fprintf(stdout, "\n closing the connection ..."); - mysql_close(mysql); - if (!opt_silent) - fprintf(stdout, "OK\n"); - } -} - +#include "mysql_client_fw.c" /* Query processing */ @@ -443,471 +77,6 @@ static void client_query() } -/* Print dashes */ - -static void my_print_dashes(MYSQL_RES *result) -{ - MYSQL_FIELD *field; - unsigned int i, j; - - mysql_field_seek(result, 0); - fputc('\t', stdout); - fputc('+', stdout); - - for(i= 0; i< mysql_num_fields(result); i++) - { - field= mysql_fetch_field(result); - for(j= 0; j < field->max_length+2; j++) - fputc('-', stdout); - fputc('+', stdout); - } - fputc('\n', stdout); -} - - -/* Print resultset metadata information */ - -static void my_print_result_metadata(MYSQL_RES *result) -{ - MYSQL_FIELD *field; - unsigned int i, j; - unsigned int field_count; - - mysql_field_seek(result, 0); - if (!opt_silent) - { - fputc('\n', stdout); - fputc('\n', stdout); - } - - field_count= mysql_num_fields(result); - for(i= 0; i< field_count; i++) - { - field= mysql_fetch_field(result); - j= strlen(field->name); - if (j < field->max_length) - j= field->max_length; - if (j < 4 && !IS_NOT_NULL(field->flags)) - j= 4; - field->max_length= j; - } - if (!opt_silent) - { - my_print_dashes(result); - fputc('\t', stdout); - fputc('|', stdout); - } - - mysql_field_seek(result, 0); - for(i= 0; i< field_count; i++) - { - field= mysql_fetch_field(result); - if (!opt_silent) - fprintf(stdout, " %-*s |", (int) field->max_length, field->name); - } - if (!opt_silent) - { - fputc('\n', stdout); - my_print_dashes(result); - } -} - - -/* Process the result set */ - -static int my_process_result_set(MYSQL_RES *result) -{ - MYSQL_ROW row; - MYSQL_FIELD *field; - unsigned int i; - unsigned int row_count= 0; - - if (!result) - return 0; - - my_print_result_metadata(result); - - while ((row= mysql_fetch_row(result)) != NULL) - { - mysql_field_seek(result, 0); - if (!opt_silent) - { - fputc('\t', stdout); - fputc('|', stdout); - } - - for(i= 0; i< mysql_num_fields(result); i++) - { - field= mysql_fetch_field(result); - if (!opt_silent) - { - if (row[i] == NULL) - fprintf(stdout, " %-*s |", (int) field->max_length, "NULL"); - else if (IS_NUM(field->type)) - fprintf(stdout, " %*s |", (int) field->max_length, row[i]); - else - fprintf(stdout, " %-*s |", (int) field->max_length, row[i]); - } - } - if (!opt_silent) - { - fputc('\t', stdout); - fputc('\n', stdout); - } - row_count++; - } - if (!opt_silent) - { - if (row_count) - my_print_dashes(result); - - if (mysql_errno(mysql) != 0) - fprintf(stderr, "\n\tmysql_fetch_row() failed\n"); - else - fprintf(stdout, "\n\t%d %s returned\n", row_count, - row_count == 1 ? "row" : "rows"); - } - return row_count; -} - - -static int my_process_result(MYSQL *mysql_arg) -{ - MYSQL_RES *result; - int row_count; - - if (!(result= mysql_store_result(mysql_arg))) - return 0; - - row_count= my_process_result_set(result); - - mysql_free_result(result); - return row_count; -} - - -/* Process the statement result set */ - -#define MAX_RES_FIELDS 50 -#define MAX_FIELD_DATA_SIZE 255 - -static int my_process_stmt_result(MYSQL_STMT *stmt) -{ - int field_count; - int row_count= 0; - MYSQL_BIND buffer[MAX_RES_FIELDS]; - MYSQL_FIELD *field; - MYSQL_RES *result; - char data[MAX_RES_FIELDS][MAX_FIELD_DATA_SIZE]; - ulong length[MAX_RES_FIELDS]; - my_bool is_null[MAX_RES_FIELDS]; - int rc, i; - - if (!(result= mysql_stmt_result_metadata(stmt))) /* No meta info */ - { - while (!mysql_stmt_fetch(stmt)) - row_count++; - return row_count; - } - - field_count= min(mysql_num_fields(result), MAX_RES_FIELDS); - - bzero((char*) buffer, sizeof(buffer)); - bzero((char*) length, sizeof(length)); - bzero((char*) is_null, sizeof(is_null)); - - for(i= 0; i < field_count; i++) - { - buffer[i].buffer_type= MYSQL_TYPE_STRING; - buffer[i].buffer_length= MAX_FIELD_DATA_SIZE; - buffer[i].length= &length[i]; - buffer[i].buffer= (void *) data[i]; - buffer[i].is_null= &is_null[i]; - } - - rc= mysql_stmt_bind_result(stmt, buffer); - check_execute(stmt, rc); - - rc= 1; - mysql_stmt_attr_set(stmt, STMT_ATTR_UPDATE_MAX_LENGTH, (void*)&rc); - rc= mysql_stmt_store_result(stmt); - check_execute(stmt, rc); - my_print_result_metadata(result); - - mysql_field_seek(result, 0); - while ((rc= mysql_stmt_fetch(stmt)) == 0) - { - if (!opt_silent) - { - fputc('\t', stdout); - fputc('|', stdout); - } - mysql_field_seek(result, 0); - for (i= 0; i < field_count; i++) - { - field= mysql_fetch_field(result); - if (!opt_silent) - { - if (is_null[i]) - fprintf(stdout, " %-*s |", (int) field->max_length, "NULL"); - else if (length[i] == 0) - { - data[i][0]= '\0'; /* unmodified buffer */ - fprintf(stdout, " %*s |", (int) field->max_length, data[i]); - } - else if (IS_NUM(field->type)) - fprintf(stdout, " %*s |", (int) field->max_length, data[i]); - else - fprintf(stdout, " %-*s |", (int) field->max_length, data[i]); - } - } - if (!opt_silent) - { - fputc('\t', stdout); - fputc('\n', stdout); - } - row_count++; - } - DIE_UNLESS(rc == MYSQL_NO_DATA); - if (!opt_silent) - { - if (row_count) - my_print_dashes(result); - fprintf(stdout, "\n\t%d %s returned\n", row_count, - row_count == 1 ? "row" : "rows"); - } - mysql_free_result(result); - return row_count; -} - - -/* Prepare statement, execute, and process result set for given query */ - -int my_stmt_result(const char *buff) -{ - MYSQL_STMT *stmt; - int row_count; - int rc; - - if (!opt_silent) - fprintf(stdout, "\n\n %s", buff); - stmt= mysql_simple_prepare(mysql, buff); - check_stmt(stmt); - - rc= mysql_stmt_execute(stmt); - check_execute(stmt, rc); - - row_count= my_process_stmt_result(stmt); - mysql_stmt_close(stmt); - - return row_count; -} - - -/* Utility function to verify a particular column data */ - -static void verify_col_data(const char *table, const char *col, - const char *exp_data) -{ - static char query[MAX_TEST_QUERY_LENGTH]; - MYSQL_RES *result; - MYSQL_ROW row; - int rc, field= 1; - - if (table && col) - { - strxmov(query, "SELECT ", col, " FROM ", table, " LIMIT 1", NullS); - if (!opt_silent) - fprintf(stdout, "\n %s", query); - rc= mysql_query(mysql, query); - myquery(rc); - - field= 0; - } - - result= mysql_use_result(mysql); - mytest(result); - - if (!(row= mysql_fetch_row(result)) || !row[field]) - { - fprintf(stdout, "\n *** ERROR: FAILED TO GET THE RESULT ***"); - exit(1); - } - if (strcmp(row[field], exp_data)) - { - fprintf(stdout, "\n obtained: `%s` (expected: `%s`)", - row[field], exp_data); - DIE_UNLESS(FALSE); - } - mysql_free_result(result); -} - - -/* Utility function to verify the field members */ - -#define verify_prepare_field(result,no,name,org_name,type,table,\ - org_table,db,length,def) \ - do_verify_prepare_field((result),(no),(name),(org_name),(type), \ - (table),(org_table),(db),(length),(def), \ - __FILE__, __LINE__) - -static void do_verify_prepare_field(MYSQL_RES *result, - unsigned int no, const char *name, - const char *org_name, - enum enum_field_types type, - const char *table, - const char *org_table, const char *db, - unsigned long length, const char *def, - const char *file, int line) -{ - MYSQL_FIELD *field; - CHARSET_INFO *cs; - ulonglong expected_field_length; - - if (!(field= mysql_fetch_field_direct(result, no))) - { - fprintf(stdout, "\n *** ERROR: FAILED TO GET THE RESULT ***"); - exit(1); - } - cs= get_charset(field->charsetnr, 0); - DIE_UNLESS(cs); - if ((expected_field_length= length * cs->mbmaxlen) > UINT_MAX32) - expected_field_length= UINT_MAX32; - if (!opt_silent) - { - fprintf(stdout, "\n field[%d]:", no); - fprintf(stdout, "\n name :`%s`\t(expected: `%s`)", field->name, name); - fprintf(stdout, "\n org_name :`%s`\t(expected: `%s`)", - field->org_name, org_name); - fprintf(stdout, "\n type :`%d`\t(expected: `%d`)", field->type, type); - if (table) - fprintf(stdout, "\n table :`%s`\t(expected: `%s`)", - field->table, table); - if (org_table) - fprintf(stdout, "\n org_table:`%s`\t(expected: `%s`)", - field->org_table, org_table); - fprintf(stdout, "\n database :`%s`\t(expected: `%s`)", field->db, db); - fprintf(stdout, "\n length :`%lu`\t(expected: `%llu`)", - field->length, expected_field_length); - fprintf(stdout, "\n maxlength:`%ld`", field->max_length); - fprintf(stdout, "\n charsetnr:`%d`", field->charsetnr); - fprintf(stdout, "\n default :`%s`\t(expected: `%s`)", - field->def ? field->def : "(null)", def ? def: "(null)"); - fprintf(stdout, "\n"); - } - DIE_UNLESS(strcmp(field->name, name) == 0); - DIE_UNLESS(strcmp(field->org_name, org_name) == 0); - /* - XXX: silent column specification change works based on number of - bytes a column occupies. So CHAR -> VARCHAR upgrade is possible even - for CHAR(2) column if its character set is multibyte. - VARCHAR -> CHAR downgrade won't work for VARCHAR(3) as one would - expect. - */ - if (cs->mbmaxlen == 1) - { - if (field->type != type) - { - fprintf(stderr, - "Expected field type: %d, got type: %d in file %s, line %d\n", - (int) type, (int) field->type, file, line); - DIE_UNLESS(field->type == type); - } - } - if (table) - DIE_UNLESS(strcmp(field->table, table) == 0); - if (org_table) - DIE_UNLESS(strcmp(field->org_table, org_table) == 0); - DIE_UNLESS(strcmp(field->db, db) == 0); - /* - Character set should be taken into account for multibyte encodings, such - as utf8. Field length is calculated as number of characters * maximum - number of bytes a character can occupy. - */ - if (length && (field->length != expected_field_length)) - { - fprintf(stderr, "Expected field length: %llu, got length: %lu\n", - expected_field_length, field->length); - DIE_UNLESS(field->length == expected_field_length); - } - if (def) - DIE_UNLESS(strcmp(field->def, def) == 0); -} - - -/* Utility function to verify the parameter count */ - -static void verify_param_count(MYSQL_STMT *stmt, long exp_count) -{ - long param_count= mysql_stmt_param_count(stmt); - if (!opt_silent) - fprintf(stdout, "\n total parameters in stmt: `%ld` (expected: `%ld`)", - param_count, exp_count); - DIE_UNLESS(param_count == exp_count); -} - - -/* Utility function to verify the total affected rows */ - -static void verify_st_affected_rows(MYSQL_STMT *stmt, ulonglong exp_count) -{ - ulonglong affected_rows= mysql_stmt_affected_rows(stmt); - if (!opt_silent) - fprintf(stdout, "\n total affected rows: `%ld` (expected: `%ld`)", - (long) affected_rows, (long) exp_count); - DIE_UNLESS(affected_rows == exp_count); -} - - -/* Utility function to verify the total affected rows */ - -static void verify_affected_rows(ulonglong exp_count) -{ - ulonglong affected_rows= mysql_affected_rows(mysql); - if (!opt_silent) - fprintf(stdout, "\n total affected rows: `%ld` (expected: `%ld`)", - (long) affected_rows, (long) exp_count); - DIE_UNLESS(affected_rows == exp_count); -} - - -/* Utility function to verify the total fields count */ - -static void verify_field_count(MYSQL_RES *result, uint exp_count) -{ - uint field_count= mysql_num_fields(result); - if (!opt_silent) - fprintf(stdout, "\n total fields in the result set: `%d` (expected: `%d`)", - field_count, exp_count); - DIE_UNLESS(field_count == exp_count); -} - - -/* Utility function to execute a query using prepare-execute */ - -#ifndef EMBEDDED_LIBRARY -static void execute_prepare_query(const char *query, ulonglong exp_count) -{ - MYSQL_STMT *stmt; - ulonglong affected_rows; - int rc; - - stmt= mysql_simple_prepare(mysql, query); - check_stmt(stmt); - - rc= mysql_stmt_execute(stmt); - myquery(rc); - - affected_rows= mysql_stmt_affected_rows(stmt); - if (!opt_silent) - fprintf(stdout, "\n total affected rows: `%ld` (expected: `%ld`)", - (long) affected_rows, (long) exp_count); - - DIE_UNLESS(affected_rows == exp_count); - mysql_stmt_close(stmt); -} -#endif - /* Store result processing */ static void client_store_result() @@ -949,267 +118,6 @@ static void client_use_result() } -/* - Accepts arbitrary number of queries and runs them against the database. - Used to fill tables for each test. -*/ - -void fill_tables(const char **query_list, unsigned query_count) -{ - int rc; - const char **query; - DBUG_ENTER("fill_tables"); - for (query= query_list; query < query_list + query_count; - ++query) - { - rc= mysql_query(mysql, *query); - myquery(rc); - } - DBUG_VOID_RETURN; -} - -/* - All state of fetch from one statement: statement handle, out buffers, - fetch position. - See fetch_n for for the only use case. -*/ - -enum { MAX_COLUMN_LENGTH= 255 }; - -typedef struct st_stmt_fetch -{ - const char *query; - unsigned stmt_no; - MYSQL_STMT *handle; - my_bool is_open; - MYSQL_BIND *bind_array; - char **out_data; - unsigned long *out_data_length; - unsigned column_count; - unsigned row_count; -} Stmt_fetch; - - -/* - Create statement handle, prepare it with statement, execute and allocate - fetch buffers. -*/ - -void stmt_fetch_init(Stmt_fetch *fetch, unsigned stmt_no_arg, - const char *query_arg) -{ - unsigned long type= CURSOR_TYPE_READ_ONLY; - int rc; - unsigned i; - MYSQL_RES *metadata; - DBUG_ENTER("stmt_fetch_init"); - - /* Save query and statement number for error messages */ - fetch->stmt_no= stmt_no_arg; - fetch->query= query_arg; - - fetch->handle= mysql_stmt_init(mysql); - - rc= mysql_stmt_prepare(fetch->handle, fetch->query, strlen(fetch->query)); - check_execute(fetch->handle, rc); - - /* - The attribute is sent to server on execute and asks to open read-only - for result set - */ - mysql_stmt_attr_set(fetch->handle, STMT_ATTR_CURSOR_TYPE, - (const void*) &type); - - rc= mysql_stmt_execute(fetch->handle); - check_execute(fetch->handle, rc); - - /* Find out total number of columns in result set */ - metadata= mysql_stmt_result_metadata(fetch->handle); - fetch->column_count= mysql_num_fields(metadata); - mysql_free_result(metadata); - - /* - Now allocate bind handles and buffers for output data: - calloc memory to reduce number of MYSQL_BIND members we need to - set up. - */ - - fetch->bind_array= (MYSQL_BIND *) calloc(1, sizeof(MYSQL_BIND) * - fetch->column_count); - fetch->out_data= (char**) calloc(1, sizeof(char*) * fetch->column_count); - fetch->out_data_length= (ulong*) calloc(1, sizeof(ulong) * - fetch->column_count); - for (i= 0; i < fetch->column_count; ++i) - { - fetch->out_data[i]= (char*) calloc(1, MAX_COLUMN_LENGTH); - fetch->bind_array[i].buffer_type= MYSQL_TYPE_STRING; - fetch->bind_array[i].buffer= fetch->out_data[i]; - fetch->bind_array[i].buffer_length= MAX_COLUMN_LENGTH; - fetch->bind_array[i].length= fetch->out_data_length + i; - } - - mysql_stmt_bind_result(fetch->handle, fetch->bind_array); - - fetch->row_count= 0; - fetch->is_open= TRUE; - - /* Ready for reading rows */ - DBUG_VOID_RETURN; -} - - -/* Fetch and print one row from cursor */ - -int stmt_fetch_fetch_row(Stmt_fetch *fetch) -{ - int rc; - unsigned i; - DBUG_ENTER("stmt_fetch_fetch_row"); - - if ((rc= mysql_stmt_fetch(fetch->handle)) == 0) - { - ++fetch->row_count; - if (!opt_silent) - printf("Stmt %d fetched row %d:\n", fetch->stmt_no, fetch->row_count); - for (i= 0; i < fetch->column_count; ++i) - { - fetch->out_data[i][fetch->out_data_length[i]]= '\0'; - if (!opt_silent) - printf("column %d: %s\n", i+1, fetch->out_data[i]); - } - } - else - fetch->is_open= FALSE; - DBUG_RETURN(rc); -} - - -void stmt_fetch_close(Stmt_fetch *fetch) -{ - unsigned i; - DBUG_ENTER("stmt_fetch_close"); - - for (i= 0; i < fetch->column_count; ++i) - free(fetch->out_data[i]); - free(fetch->out_data); - free(fetch->out_data_length); - free(fetch->bind_array); - mysql_stmt_close(fetch->handle); - DBUG_VOID_RETURN; -} - -/* - For given array of queries, open query_count cursors and fetch - from them in simultaneous manner. - In case there was an error in one of the cursors, continue - reading from the rest. -*/ - -enum fetch_type { USE_ROW_BY_ROW_FETCH= 0, USE_STORE_RESULT= 1 }; - -my_bool fetch_n(const char **query_list, unsigned query_count, - enum fetch_type fetch_type) -{ - unsigned open_statements= query_count; - int rc, error_count= 0; - Stmt_fetch *fetch_array= (Stmt_fetch*) calloc(1, sizeof(Stmt_fetch) * - query_count); - Stmt_fetch *fetch; - DBUG_ENTER("fetch_n"); - - for (fetch= fetch_array; fetch < fetch_array + query_count; ++fetch) - { - /* Init will exit(1) in case of error */ - stmt_fetch_init(fetch, fetch - fetch_array, - query_list[fetch - fetch_array]); - } - - if (fetch_type == USE_STORE_RESULT) - { - for (fetch= fetch_array; fetch < fetch_array + query_count; ++fetch) - { - rc= mysql_stmt_store_result(fetch->handle); - check_execute(fetch->handle, rc); - } - } - - while (open_statements) - { - for (fetch= fetch_array; fetch < fetch_array + query_count; ++fetch) - { - if (fetch->is_open && (rc= stmt_fetch_fetch_row(fetch))) - { - open_statements--; - /* - We try to fetch from the rest of the statements in case of - error - */ - if (rc != MYSQL_NO_DATA) - { - fprintf(stderr, - "Got error reading rows from statement %d,\n" - "query is: %s,\n" - "error message: %s", (int) (fetch - fetch_array), - fetch->query, - mysql_stmt_error(fetch->handle)); - error_count++; - } - } - } - } - if (error_count) - fprintf(stderr, "Fetch FAILED"); - else - { - unsigned total_row_count= 0; - for (fetch= fetch_array; fetch < fetch_array + query_count; ++fetch) - total_row_count+= fetch->row_count; - if (!opt_silent) - printf("Success, total rows fetched: %d\n", total_row_count); - } - for (fetch= fetch_array; fetch < fetch_array + query_count; ++fetch) - stmt_fetch_close(fetch); - free(fetch_array); - DBUG_RETURN(error_count != 0); -} - -/* Separate thread query to test some cases */ - -static my_bool thread_query(const char *query) -{ - MYSQL *l_mysql; - my_bool error; - - error= 0; - if (!opt_silent) - fprintf(stdout, "\n in thread_query(%s)", query); - if (!(l_mysql= mysql_client_init(NULL))) - { - myerror("mysql_client_init() failed"); - return 1; - } - if (!(mysql_real_connect(l_mysql, opt_host, opt_user, - opt_password, current_db, opt_port, - opt_unix_socket, 0))) - { - myerror("connection failed"); - error= 1; - goto end; - } - l_mysql->reconnect= 1; - if (mysql_query(l_mysql, query)) - { - fprintf(stderr, "Query failed (%s)\n", mysql_error(l_mysql)); - error= 1; - goto end; - } - mysql_commit(l_mysql); -end: - mysql_close(l_mysql); - return error; -} - - /* Query processing */ static void test_debug_example() @@ -18593,85 +17501,6 @@ static void test_bug13001491() } -/* - Read and parse arguments and MySQL options from my.cnf -*/ - -static const char *client_test_load_default_groups[]= { "client", 0 }; -static char **defaults_argv; - -static struct my_option client_test_long_options[] = -{ - {"basedir", 'b', "Basedir for tests.", &opt_basedir, - &opt_basedir, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0}, - {"count", 't', "Number of times test to be executed", &opt_count, - &opt_count, 0, GET_UINT, REQUIRED_ARG, 1, 0, 0, 0, 0, 0}, - {"database", 'D', "Database to use", &opt_db, &opt_db, - 0, GET_STR_ALLOC, REQUIRED_ARG, 0, 0, 0, 0, 0, 0}, - {"debug", '#', "Output debug log", &default_dbug_option, - &default_dbug_option, 0, GET_STR, OPT_ARG, 0, 0, 0, 0, 0, 0}, - {"help", '?', "Display this help and exit", 0, 0, 0, GET_NO_ARG, NO_ARG, 0, - 0, 0, 0, 0, 0}, - {"host", 'h', "Connect to host", &opt_host, &opt_host, - 0, GET_STR_ALLOC, REQUIRED_ARG, 0, 0, 0, 0, 0, 0}, - {"password", 'p', - "Password to use when connecting to server. If password is not given it's asked from the tty.", - 0, 0, 0, GET_STR, OPT_ARG, 0, 0, 0, 0, 0, 0}, - {"port", 'P', "Port number to use for connection or 0 for default to, in " - "order of preference, my.cnf, $MYSQL_TCP_PORT, " -#if MYSQL_PORT_DEFAULT == 0 - "/etc/services, " -#endif - "built-in default (" STRINGIFY_ARG(MYSQL_PORT) ").", - &opt_port, &opt_port, 0, GET_UINT, REQUIRED_ARG, 0, 0, 0, 0, 0, 0}, - {"server-arg", 'A', "Send embedded server this as a parameter.", - 0, 0, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0}, - {"show-tests", 'T', "Show all tests' names", 0, 0, 0, GET_NO_ARG, NO_ARG, - 0, 0, 0, 0, 0, 0}, - {"silent", 's', "Be more silent", 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, - 0}, -#ifdef HAVE_SMEM - {"shared-memory-base-name", 'm', "Base name of shared memory.", - &shared_memory_base_name, (uchar**)&shared_memory_base_name, 0, - GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0}, -#endif - {"socket", 'S', "Socket file to use for connection", - &opt_unix_socket, &opt_unix_socket, 0, GET_STR, - REQUIRED_ARG, 0, 0, 0, 0, 0, 0}, - {"testcase", 'c', - "May disable some code when runs as mysql-test-run testcase.", - 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0}, -#ifndef DONT_ALLOW_USER_CHANGE - {"user", 'u', "User for login if not current user", &opt_user, - &opt_user, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0}, -#endif - {"vardir", 'v', "Data dir for tests.", &opt_vardir, - &opt_vardir, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0}, - {"getopt-ll-test", 'g', "Option for testing bug in getopt library", - &opt_getopt_ll_test, &opt_getopt_ll_test, 0, - GET_LL, REQUIRED_ARG, 0, 0, LONGLONG_MAX, 0, 0, 0}, - { 0, 0, 0, 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0} -}; - - -static void usage(void) -{ - /* show the usage string when the user asks for this */ - putc('\n', stdout); - printf("%s Ver %s Distrib %s, for %s (%s)\n", - my_progname, VER, MYSQL_SERVER_VERSION, SYSTEM_TYPE, MACHINE_TYPE); - puts("By Monty, Venu, Kent and others\n"); - printf("\ -Copyright (C) 2002-2004 MySQL AB\n\ -This software comes with ABSOLUTELY NO WARRANTY. This is free software,\n\ -and you are welcome to modify and redistribute it under the GPL license\n"); - printf("Usage: %s [OPTIONS] [TESTNAME1 TESTNAME2...]\n", my_progname); - my_print_help(client_test_long_options); - print_defaults("my", client_test_load_default_groups); - my_print_variables(client_test_long_options); -} - - static struct my_tests_st my_tests[]= { { "disable_query_logs", disable_query_logs }, { "test_view_sp_list_fields", test_view_sp_list_fields }, @@ -18926,181 +17755,4 @@ static struct my_tests_st my_tests[]= { }; -static my_bool -get_one_option(int optid, const struct my_option *opt __attribute__((unused)), - char *argument) -{ - switch (optid) { - case '#': - DBUG_PUSH(argument ? argument : default_dbug_option); - break; - case 'c': - opt_testcase = 1; - break; - case 'p': - if (argument) - { - char *start=argument; - my_free(opt_password, MYF(MY_ALLOW_ZERO_PTR)); - opt_password= my_strdup(argument, MYF(MY_FAE)); - while (*argument) *argument++= 'x'; /* Destroy argument */ - if (*start) - start[1]=0; - } - else - tty_password= 1; - break; - case 's': - if (argument == disabled_my_option) - opt_silent= 0; - else - opt_silent++; - break; - case 'A': - /* - When the embedded server is being tested, the test suite needs to be - able to pass command-line arguments to the embedded server so it can - locate the language files and data directory. The test suite - (mysql-test-run) never uses config files, just command-line options. - */ - if (!embedded_server_arg_count) - { - embedded_server_arg_count= 1; - embedded_server_args[0]= (char*) ""; - } - if (embedded_server_arg_count == MAX_SERVER_ARGS-1 || - !(embedded_server_args[embedded_server_arg_count++]= - my_strdup(argument, MYF(MY_FAE)))) - { - DIE("Can't use server argument"); - } - break; - case 'T': - { - struct my_tests_st *fptr; - - printf("All possible test names:\n\n"); - for (fptr= my_tests; fptr->name; fptr++) - printf("%s\n", fptr->name); - exit(0); - break; - } - case '?': - case 'I': /* Info */ - usage(); - exit(0); - break; - } - return 0; -} - -static void get_options(int *argc, char ***argv) -{ - int ho_error; - - if ((ho_error= handle_options(argc, argv, client_test_long_options, - get_one_option))) - exit(ho_error); - - if (tty_password) - opt_password= get_tty_password(NullS); - return; -} - -/* - Print the test output on successful execution before exiting -*/ - -static void print_test_output() -{ - if (opt_silent < 3) - { - fprintf(stdout, "\n\n"); - fprintf(stdout, "All '%d' tests were successful (in '%d' iterations)", - test_count-1, opt_count); - fprintf(stdout, "\n Total execution time: %g SECS", total_time); - if (opt_count > 1) - fprintf(stdout, " (Avg: %g SECS)", total_time/opt_count); - - fprintf(stdout, "\n\n!!! SUCCESS !!!\n"); - } -} - -/*************************************************************************** - main routine -***************************************************************************/ - - -int main(int argc, char **argv) -{ - struct my_tests_st *fptr; - - MY_INIT(argv[0]); - - load_defaults("my", client_test_load_default_groups, &argc, &argv); - defaults_argv= argv; - get_options(&argc, &argv); - - if (mysql_server_init(embedded_server_arg_count, - embedded_server_args, - (char**) embedded_server_groups)) - DIE("Can't initialize MySQL server"); - - /* connect to server with no flags, default protocol, auto reconnect true */ - mysql= client_connect(0, MYSQL_PROTOCOL_DEFAULT, 1); - - total_time= 0; - for (iter_count= 1; iter_count <= opt_count; iter_count++) - { - /* Start of tests */ - test_count= 1; - start_time= time((time_t *)0); - if (!argc) - { - for (fptr= my_tests; fptr->name; fptr++) - (*fptr->function)(); - } - else - { - for ( ; *argv ; argv++) - { - for (fptr= my_tests; fptr->name; fptr++) - { - if (!strcmp(fptr->name, *argv)) - { - (*fptr->function)(); - break; - } - } - if (!fptr->name) - { - fprintf(stderr, "\n\nGiven test not found: '%s'\n", *argv); - fprintf(stderr, "See legal test names with %s -T\n\nAborting!\n", - my_progname); - client_disconnect(mysql, 1); - free_defaults(defaults_argv); - exit(1); - } - } - } - - end_time= time((time_t *)0); - total_time+= difftime(end_time, start_time); - - /* End of tests */ - } - - client_disconnect(mysql, 1); /* disconnect from server */ - - free_defaults(defaults_argv); - print_test_output(); - - while (embedded_server_arg_count > 1) - my_free(embedded_server_args[--embedded_server_arg_count],MYF(0)); - - mysql_server_end(); - - my_end(0); - - exit(0); -} +static struct my_tests_st *get_my_tests() { return my_tests; } From aacb690bd52942d2152e661f451fb3b4dd8e0ccf Mon Sep 17 00:00:00 2001 From: Bjorn Munch Date: Mon, 9 Jul 2012 16:36:50 +0200 Subject: [PATCH 080/164] Fixed compile error in mysql_client_test using gcc --- tests/mysql_client_fw.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tests/mysql_client_fw.c b/tests/mysql_client_fw.c index 27a06501d7a..34a4c05215b 100644 --- a/tests/mysql_client_fw.c +++ b/tests/mysql_client_fw.c @@ -1190,7 +1190,7 @@ and you are welcome to modify and redistribute it under the GPL license\n"); } -struct my_tests_st *get_my_tests(); /* Will be defined in main .c file */ +static struct my_tests_st *get_my_tests(); /* To be defined in main .c file */ static struct my_tests_st *my_testlist= 0; From b21319483f708a9bdff43d2773b67043054f5a35 Mon Sep 17 00:00:00 2001 From: Bjorn Munch Date: Tue, 10 Jul 2012 10:04:57 +0200 Subject: [PATCH 081/164] mysql_client_test did not build within limbysqld/examples --- libmysqld/examples/CMakeLists.txt | 3 ++- libmysqld/examples/Makefile.am | 3 ++- 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/libmysqld/examples/CMakeLists.txt b/libmysqld/examples/CMakeLists.txt index 2b900a1fa8f..d7f994d9b9f 100644 --- a/libmysqld/examples/CMakeLists.txt +++ b/libmysqld/examples/CMakeLists.txt @@ -17,7 +17,8 @@ INCLUDE_DIRECTORIES(${CMAKE_SOURCE_DIR}/include ${CMAKE_SOURCE_DIR}/libmysqld/include ${CMAKE_SOURCE_DIR}/regex - ${CMAKE_SOURCE_DIR}/zlib + ${CMAKE_SOURCE_DIR}/zlib + ${CMAKE_SOURCE_DIR}/tests ${CMAKE_SOURCE_DIR}/extra/yassl/include) # Currently does not work with DBUG, there are missing symbols reported. diff --git a/libmysqld/examples/Makefile.am b/libmysqld/examples/Makefile.am index a732b209e27..a0f1a64ffdc 100644 --- a/libmysqld/examples/Makefile.am +++ b/libmysqld/examples/Makefile.am @@ -35,7 +35,7 @@ link_sources: DEFS = -DEMBEDDED_LIBRARY INCLUDES = -I$(top_builddir)/include -I$(top_srcdir)/include -I$(srcdir) \ -I$(top_srcdir) -I$(top_srcdir)/client -I$(top_srcdir)/regex \ - $(openssl_includes) + -I$(top_srcdir)/tests $(openssl_includes) LIBS = @LIBS@ @WRAPLIBS@ @CLIENT_LIBS@ $(yassl_libs) LDADD = @CLIENT_EXTRA_LDFLAGS@ ../libmysqld.a @LIBDL@ $(CXXLDFLAGS) \ @NDB_SCI_LIBS@ @@ -51,6 +51,7 @@ mysql_LDADD = @readline_link@ @TERMCAP_LIB@ $(LDADD) mysql_client_test_embedded_LINK = $(CXXLINK) nodist_mysql_client_test_embedded_SOURCES = mysql_client_test.c +mysql_client_test.o: $(top_srcdir)/tests/mysql_client_fw.c # Don't update the files from bitkeeper %::SCCS/s.% From 13f7f002886c18fc911f6cf6d5bd672f8c96d844 Mon Sep 17 00:00:00 2001 From: Sujatha Sivakumar Date: Tue, 10 Jul 2012 14:23:17 +0530 Subject: [PATCH 082/164] BUG#11762670:MY_B_WRITE RETURN VALUE IGNORED Problem: ======= The return value from my_b_write is ignored by: `my_b_write_quoted', `my_b_write_bit',`Query_log_event::print_query_header' Most callers of `my_b_printf' ignore the return value. `log_event.cc' has many calls to it. Analysis: ======== `my_b_write' is used to write data into a file. If the write fails it sets appropriate error number and error message through my_error() function call and sets the IO_CACHE::error == -1. `my_b_printf' function is also used to write data into a file, it internally invokes my_b_write to do the write operation. Upon success it returns number of characters written to file and on error it returns -1 and sets the error through my_error() and also sets IO_CACHE::error == -1. Most of the event specific print functions for example `Create_file_log_event::print', `Execute_load_log_event::print' etc are the ones which make several calls to the above two functions and they do not check for the return value after the 'print' call. All the above mentioned abuse cases deal with the client side. Fix: === As part of bug fix a check for IO_CACHE::error == -1 has been added at a very high level after the call to the 'print' function. There are few more places where the return value of "my_b_write" is ignored those are mentioned below. +++ mysys/mf_iocache2.c 2012-06-04 07:03:15 +0000 @@ -430,7 +430,8 @@ memset(buffz, '0', minimum_width - length2); else memset(buffz, ' ', minimum_width - length2); - my_b_write(info, buffz, minimum_width - length2); +++ sql/log.cc 2012-06-08 09:04:46 +0000 @@ -2388,7 +2388,12 @@ { end= strxmov(buff, "# administrator command: ", NullS); buff_len= (ulong) (end - buff); - my_b_write(&log_file, (uchar*) buff, buff_len); At these places appropriate return value handlers have been added. client/mysqlbinlog.cc: check for IO_CACHE::error == -1 has been added after the call to the event specific print functions mysys/mf_iocache2.c: Added handler to check the written value of `my_b_write' sql/log.cc: Added handler to check the written value of `my_b_write' sql/log_event.cc: Added error simulation statements in `Create_file_log_event::print` and `Execute_load_query_log_event::print' sql/rpl_utility.h: Removed the extra ';' --- client/mysqlbinlog.cc | 13 ++++++++++++- mysys/mf_iocache2.c | 6 +++++- sql/log.cc | 5 ++++- sql/log_event.cc | 24 +++++++++++++++++++----- sql/rpl_utility.h | 2 +- 5 files changed, 41 insertions(+), 9 deletions(-) diff --git a/client/mysqlbinlog.cc b/client/mysqlbinlog.cc index e7840865a58..b5acfc5c169 100644 --- a/client/mysqlbinlog.cc +++ b/client/mysqlbinlog.cc @@ -784,8 +784,11 @@ Exit_status process_event(PRINT_EVENT_INFO *print_event_info, Log_event *ev, goto end; } else + { ce->print(result_file, print_event_info, TRUE); - + if (head->error == -1) + goto err; + } // If this binlog is not 3.23 ; why this test?? if (glob_description_event->binlog_version >= 3) { @@ -836,6 +839,8 @@ Exit_status process_event(PRINT_EVENT_INFO *print_event_info, Log_event *ev, ce->print(result_file, print_event_info, TRUE); my_free((char*)ce->fname,MYF(MY_WME)); delete ce; + if (head->error == -1) + goto err; } else warning("Ignoring Execute_load_log_event as there is no " @@ -890,6 +895,12 @@ Exit_status process_event(PRINT_EVENT_INFO *print_event_info, Log_event *ev, { convert_path_to_forward_slashes(fname); exlq->print(result_file, print_event_info, fname); + if (head->error == -1) + { + if (fname) + my_free(fname, MYF(MY_WME)); + goto err; + } } else warning("Ignoring Execute_load_query since there is no " diff --git a/mysys/mf_iocache2.c b/mysys/mf_iocache2.c index 828145b7931..dd56e332433 100644 --- a/mysys/mf_iocache2.c +++ b/mysys/mf_iocache2.c @@ -430,7 +430,11 @@ process_flags: memset(buffz, '0', minimum_width - length2); else memset(buffz, ' ', minimum_width - length2); - my_b_write(info, buffz, minimum_width - length2); + if (my_b_write(info, buffz, minimum_width - length2)) + { + my_afree(buffz); + goto err; + } my_afree(buffz); } diff --git a/sql/log.cc b/sql/log.cc index 3714f1190be..57c14b24782 100644 --- a/sql/log.cc +++ b/sql/log.cc @@ -2388,7 +2388,10 @@ bool MYSQL_QUERY_LOG::write(THD *thd, time_t current_time, { end= strxmov(buff, "# administrator command: ", NullS); buff_len= (ulong) (end - buff); - my_b_write(&log_file, (uchar*) buff, buff_len); + DBUG_EXECUTE_IF("simulate_slow_log_write_error", + {DBUG_SET("+d,simulate_file_write_error");}); + if(my_b_write(&log_file, (uchar*) buff, buff_len)) + tmp_errno= errno; } if (my_b_write(&log_file, (uchar*) sql_text, sql_text_len) || my_b_write(&log_file, (uchar*) ";\n",2) || diff --git a/sql/log_event.cc b/sql/log_event.cc index a47b3680d82..2ad740698c6 100644 --- a/sql/log_event.cc +++ b/sql/log_event.cc @@ -6312,11 +6312,18 @@ void Create_file_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info { Load_log_event::print(file, print_event_info, !check_fname_outside_temp_buf()); - /* - That one is for "file_id: etc" below: in mysqlbinlog we want the #, in - SHOW BINLOG EVENTS we don't. - */ - my_b_printf(&cache, "#"); + /** + reduce the size of io cache so that the write function is called + for every call to my_b_printf(). + */ + DBUG_EXECUTE_IF ("simulate_create_event_write_error", + {(&cache)->write_pos= (&cache)->write_end; + DBUG_SET("+d,simulate_file_write_error");}); + /* + That one is for "file_id: etc" below: in mysqlbinlog we want the #, in + SHOW BINLOG EVENTS we don't. + */ + my_b_printf(&cache, "#"); } my_b_printf(&cache, " file_id: %d block_len: %d\n", file_id, block_len); @@ -6992,6 +6999,13 @@ void Execute_load_query_log_event::print(FILE* file, Write_on_release_cache cache(&print_event_info->head_cache, file); print_query_header(&cache, print_event_info); + /** + reduce the size of io cache so that the write function is called + for every call to my_b_printf(). + */ + DBUG_EXECUTE_IF ("simulate_execute_event_write_error", + {(&cache)->write_pos= (&cache)->write_end; + DBUG_SET("+d,simulate_file_write_error");}); if (local_fname) { diff --git a/sql/rpl_utility.h b/sql/rpl_utility.h index 81a10cca814..b2577643add 100644 --- a/sql/rpl_utility.h +++ b/sql/rpl_utility.h @@ -300,7 +300,7 @@ private: public: Deferred_log_events(Relay_log_info *rli); ~Deferred_log_events(); - /* queue for exection at Query-log-event time prior the Query */; + /* queue for exection at Query-log-event time prior the Query */ int add(Log_event *ev); bool is_empty(); bool execute(Relay_log_info *rli); From dc050309716ec62531753a0edb0676fa03f138dc Mon Sep 17 00:00:00 2001 From: Bjorn Munch Date: Tue, 10 Jul 2012 11:48:43 +0200 Subject: [PATCH 083/164] mysql_client_fw.c was not included in make dist --- tests/Makefile.am | 1 + 1 file changed, 1 insertion(+) diff --git a/tests/Makefile.am b/tests/Makefile.am index 4929fa7ba9b..3da18683f85 100644 --- a/tests/Makefile.am +++ b/tests/Makefile.am @@ -33,6 +33,7 @@ EXTRA_DIST = auto_increment.res auto_increment.tst \ grant.pl grant.res test_delayed_insert.pl \ pmail.pl mail_to_db.pl table_types.pl \ myisam-big-rows.tst \ + mysql_client_fw.c \ CMakeLists.txt bin_PROGRAMS = mysql_client_test From 86476179479eb14343e1d434a2345d9cad47a28a Mon Sep 17 00:00:00 2001 From: Bjorn Munch Date: Tue, 10 Jul 2012 11:57:24 +0200 Subject: [PATCH 084/164] mysql_client_fw.c was not included in make dist --- tests/Makefile.am | 1 + 1 file changed, 1 insertion(+) diff --git a/tests/Makefile.am b/tests/Makefile.am index 4929fa7ba9b..3da18683f85 100644 --- a/tests/Makefile.am +++ b/tests/Makefile.am @@ -33,6 +33,7 @@ EXTRA_DIST = auto_increment.res auto_increment.tst \ grant.pl grant.res test_delayed_insert.pl \ pmail.pl mail_to_db.pl table_types.pl \ myisam-big-rows.tst \ + mysql_client_fw.c \ CMakeLists.txt bin_PROGRAMS = mysql_client_test From 6da51d170519ac6f0492eccdb33026e9031f653a Mon Sep 17 00:00:00 2001 From: Rohit Kalhans Date: Tue, 10 Jul 2012 18:24:11 +0530 Subject: [PATCH 085/164] BUG#11759333: SBR LOGGING WARNING MESSAGES FOR PRIMARY KEY UPDATES WITH A LIMIT OF 1 Problem: The unsafety warning for statements such as update...limit1 where pk=1 are thrown when binlog-format = STATEMENT,despite of the fact that such statements are actually safe. this leads to filling up of the disk space with false warnings. Solution: This is not a complete fix for the problem, but prevents the disks from getting filled up. This should therefore be regarded as a workaround. In the future this should be overriden by server general suppress/filtering framework. It should also be noted that another worklog is supposed to defeat this case's artificial unsafety. We use a warning suppression mechanism to detect warning flood, enable the suppression, and disable this when the average warnings/second has reduced to acceptable limits. Activation: The supression for LIMIT unsafe statements are activated when the last 50 warnings were logged in less than 50 seconds. Supression: Once activated this supression will prevent the individual warnings to be logged in the error log, but print the warning for every 50 warnings with the note: "The last warning was repeated N times in last S seconds" Noteworthy is the fact that this supression works only on the error logs and the warnings seen by the clients will remain as it is (i.e. one warning/ unsafe statement) Deactivation: The supression will be deactivated once the average # of warnings/sec have gone down to the acceptable limits. sql/sql_class.cc: Added code to supress warning while logging them to error-log. --- sql/sql_class.cc | 144 +++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 139 insertions(+), 5 deletions(-) diff --git a/sql/sql_class.cc b/sql/sql_class.cc index 7e93157c69e..c118030e7b4 100644 --- a/sql/sql_class.cc +++ b/sql/sql_class.cc @@ -4806,6 +4806,140 @@ show_query_type(THD::enum_binlog_query_type qtype) } #endif +/* + Constants required for the limit unsafe warnings suppression +*/ +//seconds after which the limit unsafe warnings suppression will be activated +#define LIMIT_UNSAFE_WARNING_ACTIVATION_TIMEOUT 50 +//number of limit unsafe warnings after which the suppression will be activated +#define LIMIT_UNSAFE_WARNING_ACTIVATION_THRESHOLD_COUNT 50 + +static struct timeval limit_unsafe_suppression_start_time; +static struct timezone limit_unsafe_suppression_start_time_zone; +static bool unsafe_warning_suppression_is_activated= false; +static int limit_unsafe_warning_count= 0; + +/** + Auxiliary function to reset the limit unsafety warning suppression. +*/ +static void reset_binlog_unsafe_suppression() +{ + DBUG_ENTER("reset_binlog_unsafe_suppression"); + unsafe_warning_suppression_is_activated= false; + limit_unsafe_warning_count= 0; + gettimeofday(&limit_unsafe_suppression_start_time, + &limit_unsafe_suppression_start_time_zone); + DBUG_VOID_RETURN; +} + +/** + Auxiliary function to print warning in the error log. +*/ +static void print_unsafe_warning_to_log(int unsafe_type, char* buf, + char* query) +{ + DBUG_ENTER("print_unsafe_warning_in_log"); + sprintf(buf, ER(ER_BINLOG_UNSAFE_STATEMENT), + ER(LEX::binlog_stmt_unsafe_errcode[unsafe_type])); + sql_print_warning(ER(ER_MESSAGE_AND_STATEMENT), buf, query); + DBUG_VOID_RETURN; +} + +/** + Auxiliary function to check if the warning for limit unsafety should be + thrown or suppressed. Details of the implementation can be found in the + comments inline. + SYNOPSIS: + @params + buf - buffer to hold the warning message text + unsafe_type - The type of unsafety. + query - The actual query statement. + + TODO: Remove this function and implement a general service for all warnings + that would prevent flooding the error log. +*/ +static void do_unsafe_limit_checkout(char* buf, int unsafe_type, char* query) +{ + struct timeval now; + struct timezone tz_now; + DBUG_ENTER("do_unsafe_limit_checkout"); + DBUG_ASSERT(unsafe_type == LEX::BINLOG_STMT_UNSAFE_LIMIT); + limit_unsafe_warning_count++; + /* + INITIALIZING: + If this is the first time this function is called with log warning + enabled, the monitoring the unsafe warnings should start. + */ + if (limit_unsafe_suppression_start_time.tv_sec == 0) + { + gettimeofday(&limit_unsafe_suppression_start_time, + &limit_unsafe_suppression_start_time_zone); + print_unsafe_warning_to_log(unsafe_type, buf, query); + } + else + { + if (!unsafe_warning_suppression_is_activated) + print_unsafe_warning_to_log(unsafe_type, buf, query); + + if (limit_unsafe_warning_count >= + LIMIT_UNSAFE_WARNING_ACTIVATION_THRESHOLD_COUNT) + { + gettimeofday (&now, &tz_now); + if (!unsafe_warning_suppression_is_activated) + { + /* + ACTIVATION: + We got LIMIT_UNSAFE_WARNING_ACTIVATION_THRESHOLD_COUNT warnings in + less than LIMIT_UNSAFE_WARNING_ACTIVATION_TIMEOUT we activate the + suppression. + */ + if ((now.tv_sec-limit_unsafe_suppression_start_time.tv_sec) <= + LIMIT_UNSAFE_WARNING_ACTIVATION_TIMEOUT) + { + unsafe_warning_suppression_is_activated= true; + DBUG_PRINT("info",("A warning flood has been detected and the limit \ +unsafety warning suppression has been activated.")); + } + else + { + /* + there is no flooding till now, therefore we restart the monitoring + */ + gettimeofday(&limit_unsafe_suppression_start_time, + &limit_unsafe_suppression_start_time_zone); + limit_unsafe_warning_count= 0; + } + } + else + { + /* + Print the suppression note and the unsafe warning. + */ + sql_print_information("The following warning was suppressed %d times \ +during the last %d seconds in the error log", + limit_unsafe_warning_count, + (int) + (now.tv_sec - + limit_unsafe_suppression_start_time.tv_sec)); + print_unsafe_warning_to_log(unsafe_type, buf, query); + /* + DEACTIVATION: We got LIMIT_UNSAFE_WARNING_ACTIVATION_THRESHOLD_COUNT + warnings in more than LIMIT_UNSAFE_WARNING_ACTIVATION_TIMEOUT, the + suppression should be deactivated. + */ + if ((now.tv_sec - limit_unsafe_suppression_start_time.tv_sec) > + LIMIT_UNSAFE_WARNING_ACTIVATION_TIMEOUT) + { + reset_binlog_unsafe_suppression(); + DBUG_PRINT("info",("The limit unsafety warning supression has been \ +deactivated")); + } + } + limit_unsafe_warning_count= 0; + } + } + DBUG_VOID_RETURN; +} /** Auxiliary method used by @c binlog_query() to raise warnings. @@ -4815,6 +4949,7 @@ show_query_type(THD::enum_binlog_query_type qtype) */ void THD::issue_unsafe_warnings() { + char buf[MYSQL_ERRMSG_SIZE * 2]; DBUG_ENTER("issue_unsafe_warnings"); /* Ensure that binlog_unsafe_warning_flags is big enough to hold all @@ -4840,17 +4975,16 @@ void THD::issue_unsafe_warnings() ER(LEX::binlog_stmt_unsafe_errcode[unsafe_type])); if (global_system_variables.log_warnings) { - char buf[MYSQL_ERRMSG_SIZE * 2]; - sprintf(buf, ER(ER_BINLOG_UNSAFE_STATEMENT), - ER(LEX::binlog_stmt_unsafe_errcode[unsafe_type])); - sql_print_warning(ER(ER_MESSAGE_AND_STATEMENT), buf, query()); + if (unsafe_type == LEX::BINLOG_STMT_UNSAFE_LIMIT) + do_unsafe_limit_checkout( buf, unsafe_type, query()); + else //cases other than LIMIT unsafety + print_unsafe_warning_to_log(unsafe_type, buf, query()); } } } DBUG_VOID_RETURN; } - /** Log the current query. From dfa0093096f305a893fdd9baefe010523f94c4a5 Mon Sep 17 00:00:00 2001 From: unknown Date: Tue, 10 Jul 2012 18:55:07 +0530 Subject: [PATCH 086/164] From a47e778a61e26a195642dde82f0062da2dfa2aaa Mon Sep 17 00:00:00 2001 From: Jon Olav Hauglid Date: Tue, 10 Jul 2012 16:13:02 +0200 Subject: [PATCH 087/164] Bug#12623923 Server can crash after failure to create primary key with innodb tables The bug was triggered if a single ALTER TABLE statement both added and dropped indexes and ALTER TABLE failed during drop (e.g. because the index was needed in a foreign key constraint). In such cases, the server index information would get out of sync with InnoDB - the added index would be present inside InnoDB, but not in the server. This could then lead to InnoDB error messages and/or server crashes. The root cause is that new indexes are added before old indexes are dropped. This means that if ALTER TABLE fails while dropping indexes, index changes will be reverted in the server but not inside InnoDB. This patch fixes the problem by dropping any added indexes if drop fails (for ALTER TABLE statements that both adds and drops indexes). However, this won't work if we added a primary key as this key might not be possible to drop inside InnoDB. Therefore, we resort to the copy algorithm if a primary key is added by an ALTER TABLE statement that also drops an index. In 5.6 this bug is more properly fixed by the handler interface changes done in the scope of WL#5534 "Online ALTER". --- sql/sql_table.cc | 49 +++++++++++++++++++---- storage/innobase/handler/ha_innodb.cc | 13 ++++-- storage/innobase/handler/handler0alter.cc | 14 +++---- 3 files changed, 57 insertions(+), 19 deletions(-) diff --git a/sql/sql_table.cc b/sql/sql_table.cc index 60ae2ed800b..7d70fa8afd2 100644 --- a/sql/sql_table.cc +++ b/sql/sql_table.cc @@ -6313,11 +6313,23 @@ bool mysql_alter_table(THD *thd,char *new_db, char *new_name, the primary key is not added and dropped in the same statement. Otherwise we have to recreate the table. need_copy_table is no-zero at this place. + + Also, in-place is not possible if we add a primary key + and drop another key in the same statement. If the drop fails, + we will not be able to revert adding of primary key. */ if ( pk_changed < 2 ) { - if ((alter_flags & needed_inplace_with_read_flags) == - needed_inplace_with_read_flags) + if ((needed_inplace_with_read_flags & HA_INPLACE_ADD_PK_INDEX_NO_WRITE) && + index_drop_count > 0) + { + /* + Do copy, not in-place ALTER. + Avoid setting ALTER_TABLE_METADATA_ONLY. + */ + } + else if ((alter_flags & needed_inplace_with_read_flags) == + needed_inplace_with_read_flags) { /* All required in-place flags to allow concurrent reads are present. */ need_copy_table= ALTER_TABLE_METADATA_ONLY; @@ -6579,17 +6591,38 @@ bool mysql_alter_table(THD *thd,char *new_db, char *new_name, Tell the handler to prepare for drop indexes. This re-numbers the indexes to get rid of gaps. */ - if ((error= table->file->prepare_drop_index(table, key_numbers, - index_drop_count))) + error= table->file->prepare_drop_index(table, key_numbers, + index_drop_count); + if (!error) { - table->file->print_error(error, MYF(0)); - goto err_new_table_cleanup; + /* Tell the handler to finally drop the indexes. */ + error= table->file->final_drop_index(table); } - /* Tell the handler to finally drop the indexes. */ - if ((error= table->file->final_drop_index(table))) + if (error) { table->file->print_error(error, MYF(0)); + if (index_add_count) // Drop any new indexes added. + { + /* + Temporarily set table-key_info to include information about the + indexes added above that we now need to drop. + */ + KEY *save_key_info= table->key_info; + table->key_info= key_info_buffer; + if ((error= table->file->prepare_drop_index(table, index_add_buffer, + index_add_count))) + table->file->print_error(error, MYF(0)); + else if ((error= table->file->final_drop_index(table))) + table->file->print_error(error, MYF(0)); + table->key_info= save_key_info; + } + + /* + Mark this TABLE instance as stale to avoid + out-of-sync index information. + */ + table->m_needs_reopen= true; goto err_new_table_cleanup; } } diff --git a/storage/innobase/handler/ha_innodb.cc b/storage/innobase/handler/ha_innodb.cc index ea47a8160f9..60a62482f9c 100644 --- a/storage/innobase/handler/ha_innodb.cc +++ b/storage/innobase/handler/ha_innodb.cc @@ -8010,10 +8010,15 @@ innobase_get_mysql_key_number_for_index( } } - /* Print an error message if we cannot find the index - ** in the "index translation table". */ - sql_print_error("Cannot find index %s in InnoDB index " - "translation table.", index->name); + /* If index_count in translation table is set to 0, it + is possible we are in the process of rebuilding table, + do not spit error in this case */ + if (share->idx_trans_tbl.index_count) { + /* Print an error message if we cannot find the index + ** in the "index translation table". */ + sql_print_error("Cannot find index %s in InnoDB index " + "translation table.", index->name); + } } /* If we do not have an "index translation table", or not able diff --git a/storage/innobase/handler/handler0alter.cc b/storage/innobase/handler/handler0alter.cc index e8e3cb0e5cd..5e20bea36dd 100644 --- a/storage/innobase/handler/handler0alter.cc +++ b/storage/innobase/handler/handler0alter.cc @@ -773,7 +773,7 @@ ha_innobase::add_index( row_mysql_lock_data_dictionary(trx); dict_locked = TRUE; - ut_d(dict_table_check_for_dup_indexes(prebuilt->table, FALSE)); + ut_d(dict_table_check_for_dup_indexes(prebuilt->table, TRUE)); /* If a new primary key is defined for the table we need to drop the original table and rebuild all indexes. */ @@ -809,7 +809,7 @@ ha_innobase::add_index( } ut_d(dict_table_check_for_dup_indexes(prebuilt->table, - FALSE)); + TRUE)); mem_heap_free(heap); trx_general_rollback_for_mysql(trx, NULL); row_mysql_unlock_data_dictionary(trx); @@ -1061,7 +1061,7 @@ ha_innobase::final_add_index( trx_commit_for_mysql(prebuilt->trx); } - ut_d(dict_table_check_for_dup_indexes(prebuilt->table, FALSE)); + ut_d(dict_table_check_for_dup_indexes(prebuilt->table, TRUE)); row_mysql_unlock_data_dictionary(trx); trx_free_for_mysql(trx); @@ -1104,7 +1104,7 @@ ha_innobase::prepare_drop_index( /* Test and mark all the indexes to be dropped */ row_mysql_lock_data_dictionary(trx); - ut_d(dict_table_check_for_dup_indexes(prebuilt->table, FALSE)); + ut_d(dict_table_check_for_dup_indexes(prebuilt->table, TRUE)); /* Check that none of the indexes have previously been flagged for deletion. */ @@ -1275,7 +1275,7 @@ func_exit: } while (index); } - ut_d(dict_table_check_for_dup_indexes(prebuilt->table, FALSE)); + ut_d(dict_table_check_for_dup_indexes(prebuilt->table, TRUE)); row_mysql_unlock_data_dictionary(trx); DBUG_RETURN(err); @@ -1322,7 +1322,7 @@ ha_innobase::final_drop_index( prebuilt->table->flags, user_thd); row_mysql_lock_data_dictionary(trx); - ut_d(dict_table_check_for_dup_indexes(prebuilt->table, FALSE)); + ut_d(dict_table_check_for_dup_indexes(prebuilt->table, TRUE)); if (UNIV_UNLIKELY(err)) { @@ -1366,7 +1366,7 @@ ha_innobase::final_drop_index( share->idx_trans_tbl.index_count = 0; func_exit: - ut_d(dict_table_check_for_dup_indexes(prebuilt->table, FALSE)); + ut_d(dict_table_check_for_dup_indexes(prebuilt->table, TRUE)); trx_commit_for_mysql(trx); trx_commit_for_mysql(prebuilt->trx); row_mysql_unlock_data_dictionary(trx); From 3a71ab0805f2e8cb46872d10b98d8355d15ddcb8 Mon Sep 17 00:00:00 2001 From: Mayank Prasad Date: Tue, 10 Jul 2012 19:59:59 +0530 Subject: [PATCH 088/164] Bug#13889741: HANDLE_FATAL_SIGNAL IN _DB_ENTER_ |HANDLE_FATAL_SIGNAL IN STRNLEN Follow up patch to resolve pb2 failure on windows platform --- sql/sql_show.cc | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/sql/sql_show.cc b/sql/sql_show.cc index 189532b2479..e9873d2325f 100644 --- a/sql/sql_show.cc +++ b/sql/sql_show.cc @@ -2784,9 +2784,12 @@ int make_db_list(THD *thd, List *files, /* If we have db lookup vaule we just add it to list and - exit from the function + exit from the function. + We don't do this for database names longer than the maximum + path length. */ - if (lookup_field_vals->db_value.str) + if (lookup_field_vals->db_value.str && + lookup_field_vals->db_value.length < FN_REFLEN) { if (is_infoschema_db(lookup_field_vals->db_value.str, lookup_field_vals->db_value.length)) From 6fe6288d837a1a3d6a78db9a230e009d039464ab Mon Sep 17 00:00:00 2001 From: Rohit Kalhans Date: Tue, 10 Jul 2012 22:02:25 +0530 Subject: [PATCH 089/164] bug#11759333: follow-up patch for the failure on pb2 windows build --- sql/sql_class.cc | 26 ++++++++++---------------- 1 file changed, 10 insertions(+), 16 deletions(-) diff --git a/sql/sql_class.cc b/sql/sql_class.cc index c118030e7b4..8931d67dd25 100644 --- a/sql/sql_class.cc +++ b/sql/sql_class.cc @@ -4814,8 +4814,7 @@ show_query_type(THD::enum_binlog_query_type qtype) //number of limit unsafe warnings after which the suppression will be activated #define LIMIT_UNSAFE_WARNING_ACTIVATION_THRESHOLD_COUNT 50 -static struct timeval limit_unsafe_suppression_start_time; -static struct timezone limit_unsafe_suppression_start_time_zone; +static ulonglong limit_unsafe_suppression_start_time= 0; static bool unsafe_warning_suppression_is_activated= false; static int limit_unsafe_warning_count= 0; @@ -4827,8 +4826,7 @@ static void reset_binlog_unsafe_suppression() DBUG_ENTER("reset_binlog_unsafe_suppression"); unsafe_warning_suppression_is_activated= false; limit_unsafe_warning_count= 0; - gettimeofday(&limit_unsafe_suppression_start_time, - &limit_unsafe_suppression_start_time_zone); + limit_unsafe_suppression_start_time= my_getsystime()/10000000; DBUG_VOID_RETURN; } @@ -4860,8 +4858,7 @@ static void print_unsafe_warning_to_log(int unsafe_type, char* buf, */ static void do_unsafe_limit_checkout(char* buf, int unsafe_type, char* query) { - struct timeval now; - struct timezone tz_now; + ulonglong now= 0; DBUG_ENTER("do_unsafe_limit_checkout"); DBUG_ASSERT(unsafe_type == LEX::BINLOG_STMT_UNSAFE_LIMIT); limit_unsafe_warning_count++; @@ -4870,10 +4867,9 @@ static void do_unsafe_limit_checkout(char* buf, int unsafe_type, char* query) If this is the first time this function is called with log warning enabled, the monitoring the unsafe warnings should start. */ - if (limit_unsafe_suppression_start_time.tv_sec == 0) + if (limit_unsafe_suppression_start_time == 0) { - gettimeofday(&limit_unsafe_suppression_start_time, - &limit_unsafe_suppression_start_time_zone); + limit_unsafe_suppression_start_time= my_getsystime()/10000000; print_unsafe_warning_to_log(unsafe_type, buf, query); } else @@ -4884,7 +4880,7 @@ static void do_unsafe_limit_checkout(char* buf, int unsafe_type, char* query) if (limit_unsafe_warning_count >= LIMIT_UNSAFE_WARNING_ACTIVATION_THRESHOLD_COUNT) { - gettimeofday (&now, &tz_now); + now= my_getsystime()/10000000; if (!unsafe_warning_suppression_is_activated) { /* @@ -4893,7 +4889,7 @@ static void do_unsafe_limit_checkout(char* buf, int unsafe_type, char* query) less than LIMIT_UNSAFE_WARNING_ACTIVATION_TIMEOUT we activate the suppression. */ - if ((now.tv_sec-limit_unsafe_suppression_start_time.tv_sec) <= + if ((now-limit_unsafe_suppression_start_time) <= LIMIT_UNSAFE_WARNING_ACTIVATION_TIMEOUT) { unsafe_warning_suppression_is_activated= true; @@ -4905,8 +4901,7 @@ unsafety warning suppression has been activated.")); /* there is no flooding till now, therefore we restart the monitoring */ - gettimeofday(&limit_unsafe_suppression_start_time, - &limit_unsafe_suppression_start_time_zone); + limit_unsafe_suppression_start_time= my_getsystime()/10000000; limit_unsafe_warning_count= 0; } } @@ -4919,15 +4914,14 @@ unsafety warning suppression has been activated.")); during the last %d seconds in the error log", limit_unsafe_warning_count, (int) - (now.tv_sec - - limit_unsafe_suppression_start_time.tv_sec)); + (now-limit_unsafe_suppression_start_time)); print_unsafe_warning_to_log(unsafe_type, buf, query); /* DEACTIVATION: We got LIMIT_UNSAFE_WARNING_ACTIVATION_THRESHOLD_COUNT warnings in more than LIMIT_UNSAFE_WARNING_ACTIVATION_TIMEOUT, the suppression should be deactivated. */ - if ((now.tv_sec - limit_unsafe_suppression_start_time.tv_sec) > + if ((now - limit_unsafe_suppression_start_time) > LIMIT_UNSAFE_WARNING_ACTIVATION_TIMEOUT) { reset_binlog_unsafe_suppression(); From fc74e2e08f0332ff94cb536956f28177c4048c54 Mon Sep 17 00:00:00 2001 From: Chaithra Gopalareddy Date: Wed, 11 Jul 2012 08:19:17 +0530 Subject: [PATCH 090/164] Bug #13444084:PRIMARY KEY OR UNIQUE KEY >453 BYTES FAILS FOR COUNT DISTINCT GROUP BY PROBLEM: To calculate the final result of the count(distinct(select 1)) we call 'end_send' function instead of 'end_send_group'. 'end_send' cannot be called if we have aggregate functions that need to be evaluated. ANALYSIS: While evaluating for a possible loose_index_scan option for the query, the variable 'is_agg_distinct' is set to 'false' as the item in the distinct clause is not a field. But, we choose loose_index_scan by not taking this into consideration. So, while setting the final 'select_function' to evaluate the result, 'precomputed_group_by' is set to TRUE as in this case loose_index_scan is chosen and we do not have agg_distinct in the query (which is clearly wrong as we have one). As a result, 'end_send' function is chosen as the final select_function instead of 'end_send_group'. The difference between the two being, 'end_send_group' evaluates the aggregates while 'end_send' does not. Hence the wrong result. FIX: The variable 'is_agg_distinct' always represents if 'loose_idnex_scan' can be chosen for aggregate_distinct functions present in the select. So, we check for this variable to continue with loose_index_scan option. sql/opt_range.cc: Do not continue if is_agg_distinct is not set in case of agg_distinct functions. --- sql/opt_range.cc | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/sql/opt_range.cc b/sql/opt_range.cc index 8a6607cf343..03f444c22b5 100644 --- a/sql/opt_range.cc +++ b/sql/opt_range.cc @@ -9463,9 +9463,10 @@ get_best_group_min_max(PARAM *param, SEL_TREE *tree, double read_time) have_min= TRUE; else if (min_max_item->sum_func() == Item_sum::MAX_FUNC) have_max= TRUE; - else if (min_max_item->sum_func() == Item_sum::COUNT_DISTINCT_FUNC || - min_max_item->sum_func() == Item_sum::SUM_DISTINCT_FUNC || - min_max_item->sum_func() == Item_sum::AVG_DISTINCT_FUNC) + else if (is_agg_distinct && + (min_max_item->sum_func() == Item_sum::COUNT_DISTINCT_FUNC || + min_max_item->sum_func() == Item_sum::SUM_DISTINCT_FUNC || + min_max_item->sum_func() == Item_sum::AVG_DISTINCT_FUNC)) continue; else DBUG_RETURN(NULL); From 28255d4c58945953b3d6e377165bfb38ef4060ad Mon Sep 17 00:00:00 2001 From: unknown Date: Wed, 11 Jul 2012 08:43:26 +0200 Subject: [PATCH 091/164] From 21bc74e0c97be00d011676912e4f3226802ad1c6 Mon Sep 17 00:00:00 2001 From: unknown Date: Wed, 11 Jul 2012 16:42:55 +0530 Subject: [PATCH 092/164] From 4c33e849f17d321b198d9e9fbcaa150358993bc4 Mon Sep 17 00:00:00 2001 From: unknown Date: Wed, 11 Jul 2012 15:18:34 +0200 Subject: [PATCH 093/164] Raise version number after cloning 5.1.65 --- configure.in | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/configure.in b/configure.in index 4e7a3303353..068328992e0 100644 --- a/configure.in +++ b/configure.in @@ -12,7 +12,7 @@ dnl dnl When changing the major version number please also check the switch dnl statement in mysqlbinlog::check_master_version(). You may also need dnl to update version.c in ndb. -AC_INIT([MySQL Server], [5.1.65], [], [mysql]) +AC_INIT([MySQL Server], [5.1.66], [], [mysql]) AC_CONFIG_SRCDIR([sql/mysqld.cc]) AC_CANONICAL_SYSTEM From f2d7609ac0c1af1065400f6a6c8b5295c184f381 Mon Sep 17 00:00:00 2001 From: Michael Widenius Date: Tue, 7 Aug 2012 01:58:05 +0300 Subject: [PATCH 094/164] Use less memory when growing HEAP tables. See MDEV-436 mysql-test/suite/heap/heap.result: Added test case for MDEV-436 mysql-test/suite/heap/heap.test: Added test case for MDEV-436 storage/heap/hp_block.c: Don't allocate a set of HP_PTRS when not needed. This saves us about 1024 bytes for most allocations. storage/heap/hp_create.c: Made the initial allocation of block sizes depending on min_records and max_records. --- mysql-test/suite/heap/heap.result | 24 ++++++++++++++++++++++++ mysql-test/suite/heap/heap.test | 23 +++++++++++++++++++++++ storage/heap/hp_block.c | 23 ++++++++++++----------- storage/heap/hp_create.c | 23 +++++++++++++++++------ 4 files changed, 76 insertions(+), 17 deletions(-) diff --git a/mysql-test/suite/heap/heap.result b/mysql-test/suite/heap/heap.result index f058c9f9c72..29ebf504e1a 100644 --- a/mysql-test/suite/heap/heap.result +++ b/mysql-test/suite/heap/heap.result @@ -738,3 +738,27 @@ SELECT c2 FROM t1; c2 0 DROP TABLE t1; +CREATE TABLE t1 (a int, index(a)) engine=heap min_rows=10 max_rows=100; +insert into t1 values(1); +select data_length,index_length from information_schema.tables where table_schema="test" and table_name="t1"; +data_length index_length +1600 2400 +drop table t1; +CREATE TABLE t1 (a int, index(a)) engine=heap min_rows=10 max_rows=10000; +insert into t1 values(1); +select data_length,index_length from information_schema.tables where table_schema="test" and table_name="t1"; +data_length index_length +16000 24000 +drop table t1; +CREATE TABLE t1 (a int, index(a)) engine=heap min_rows=3000 max_rows=3000; +insert into t1 values(1); +select data_length,index_length from information_schema.tables where table_schema="test" and table_name="t1"; +data_length index_length +48000 72000 +drop table t1; +CREATE TABLE t1 (a int, index(a)) engine=heap max_rows=4000; +insert into t1 values(1); +select data_length,index_length from information_schema.tables where table_schema="test" and table_name="t1"; +data_length index_length +16000 24000 +drop table t1; diff --git a/mysql-test/suite/heap/heap.test b/mysql-test/suite/heap/heap.test index 7d56425799a..062b48f2c31 100644 --- a/mysql-test/suite/heap/heap.test +++ b/mysql-test/suite/heap/heap.test @@ -485,3 +485,26 @@ INSERT INTO t1 VALUES('', 0); ALTER TABLE t1 MODIFY c1 VARCHAR(101); SELECT c2 FROM t1; DROP TABLE t1; + +# +# Show that MIN_ROWS and MAX_ROWS have an effect on how data_length +# and index_length are allocated. +# This is different for 32 and 64 bit machines as pointer lengths are different +# + +CREATE TABLE t1 (a int, index(a)) engine=heap min_rows=10 max_rows=100; +insert into t1 values(1); +select data_length,index_length from information_schema.tables where table_schema="test" and table_name="t1"; +drop table t1; +CREATE TABLE t1 (a int, index(a)) engine=heap min_rows=10 max_rows=10000; +insert into t1 values(1); +select data_length,index_length from information_schema.tables where table_schema="test" and table_name="t1"; +drop table t1; +CREATE TABLE t1 (a int, index(a)) engine=heap min_rows=3000 max_rows=3000; +insert into t1 values(1); +select data_length,index_length from information_schema.tables where table_schema="test" and table_name="t1"; +drop table t1; +CREATE TABLE t1 (a int, index(a)) engine=heap max_rows=4000; +insert into t1 values(1); +select data_length,index_length from information_schema.tables where table_schema="test" and table_name="t1"; +drop table t1; diff --git a/storage/heap/hp_block.c b/storage/heap/hp_block.c index 90efeeb7924..01978e2b4e8 100644 --- a/storage/heap/hp_block.c +++ b/storage/heap/hp_block.c @@ -64,18 +64,19 @@ int hp_get_new_block(HP_BLOCK *block, size_t *alloc_length) break; /* - Allocate space for leaf block plus space for upper level blocks up to - first level that has a free slot to put the pointer. - In some cases we actually allocate more then we need: - Consider e.g. a situation where we have one level 1 block and one level 0 - block, the level 0 block is full and this function is called. We only - need a leaf block in this case. Nevertheless, we will get here with i=1 - and will also allocate sizeof(HP_PTRS) for non-leaf block and will never - use this space. - This doesn't add much overhead - with current values of sizeof(HP_PTRS) - and my_default_record_cache_size we get about 1/128 unused memory. + Allocate space for leaf block (data) plus space for upper level blocks + up to first level that has a free slot to put the pointer. + If this is a new level, we have to allocate pointers to all future + lower levels. + + For example, for level 0, we allocate data for X rows. + When level 0 is full, we allocate data for HPTRS_IN_NODE + X rows. + Next time we allocate data for X rows. + When level 1 is full, we allocate data for HPTRS_IN_NODE at level 2 and 1 + + X rows at level 0. */ - *alloc_length=sizeof(HP_PTRS)*i+block->records_in_block* block->recbuffer; + *alloc_length= (sizeof(HP_PTRS)* ((i == block->levels) ? i : i - 1) + + block->records_in_block* block->recbuffer); if (!(root=(HP_PTRS*) my_malloc(*alloc_length,MYF(MY_WME)))) return 1; diff --git a/storage/heap/hp_create.c b/storage/heap/hp_create.c index 22ab9b54a85..d170d1abc65 100644 --- a/storage/heap/hp_create.c +++ b/storage/heap/hp_create.c @@ -245,21 +245,32 @@ static void init_block(HP_BLOCK *block, uint reclength, ulong min_records, { uint i,recbuffer,records_in_block; - max_records= max(min_records,max_records); + /* + If not min_records and max_records are given, optimize for 1000 rows + */ + if (!min_records) + min_records= min(1000, max_records); if (!max_records) - max_records= 1000; /* As good as quess as anything */ - recbuffer= (uint) (reclength + sizeof(uchar**) - 1) & ~(sizeof(uchar**) - 1); - records_in_block= max_records / 10; + max_records= max(min_records, 1000); /* We don't want too few records_in_block as otherwise the overhead of of the HP_PTRS block will be too notable */ - records_in_block= min(1000, max_records); + records_in_block= max(1000, min_records); + records_in_block= min(records_in_block, max_records); + /* If big max_records is given, allocate bigger blocks */ + records_in_block= max(records_in_block, max_records / 10); + /* We don't want too few blocks per row either */ if (records_in_block < 10) records_in_block= 10; - /* The + 1 is there to ensure that we get at least 1 row per level */ + recbuffer= (uint) (reclength + sizeof(uchar**) - 1) & ~(sizeof(uchar**) - 1); + /* + Don't allocate more than my_default_record_cache_size per level. + The + 1 is there to ensure that we get at least 1 row per level (for + the exceptional case of very long rows) + */ if (records_in_block*recbuffer > (my_default_record_cache_size-sizeof(HP_PTRS)*HP_MAX_LEVELS)) records_in_block= (my_default_record_cache_size - sizeof(HP_PTRS) * From e022b6ef07529d83e8c1cbd5e3d374fc5cc75721 Mon Sep 17 00:00:00 2001 From: Sergei Golubchik Date: Wed, 8 Aug 2012 12:08:54 +0200 Subject: [PATCH 095/164] MDEV-392 MTR: skip-combinations option is declared in help, but is ignored remove unused mtr option --- mysql-test/mysql-test-run.pl | 2 -- 1 file changed, 2 deletions(-) diff --git a/mysql-test/mysql-test-run.pl b/mysql-test/mysql-test-run.pl index a2802916fe4..d78a0254156 100755 --- a/mysql-test/mysql-test-run.pl +++ b/mysql-test/mysql-test-run.pl @@ -1147,7 +1147,6 @@ sub command_line_setup { 'start-from=s' => \&collect_option, 'big-test+' => \$opt_big_test, 'combination=s' => \@opt_combinations, - 'skip-combinations' => \&collect_option, 'experimental=s' => \@opt_experimentals, # skip-im is deprecated and silently ignored 'skip-im' => \&ignore_option, @@ -6261,7 +6260,6 @@ Options to control what engine/variation to run all generated configs combination= Use at least twice to run tests with specified options to mysqld - skip-combinations Ignore combination file (or options) Options to control directories to use tmpdir=DIR The directory where temporary files are stored From 704898bf3200af4da42c1bf9251a7da5533db73f Mon Sep 17 00:00:00 2001 From: Sergei Golubchik Date: Wed, 8 Aug 2012 12:32:34 +0200 Subject: [PATCH 096/164] undo the fix for MySQL Bug#12998841 --- client/client_priv.h | 1 - client/mysql.cc | 13 ------- client/mysqladmin.cc | 13 ------- client/mysqlslap.c | 12 ------ client/mysqltest.cc | 8 +--- include/mysql.h | 3 +- include/mysql.h.pp | 3 +- include/sql_common.h | 2 - mysql-test/t/plugin_auth.test | 4 +- sql-common/client.c | 70 +++++------------------------------ sql-common/client_plugin.c | 5 --- 11 files changed, 14 insertions(+), 120 deletions(-) diff --git a/client/client_priv.h b/client/client_priv.h index 2362811d2b3..b776dcf8014 100644 --- a/client/client_priv.h +++ b/client/client_priv.h @@ -87,7 +87,6 @@ enum options_client OPT_PLUGIN_DIR, OPT_DEFAULT_AUTH, OPT_DEFAULT_PLUGIN, - OPT_ENABLE_CLEARTEXT_PLUGIN, OPT_MAX_CLIENT_OPTION }; diff --git a/client/mysql.cc b/client/mysql.cc index 630c6215603..b6bc2f4b68f 100644 --- a/client/mysql.cc +++ b/client/mysql.cc @@ -148,8 +148,6 @@ static my_bool column_types_flag; static my_bool preserve_comments= 0; static ulong opt_max_allowed_packet, opt_net_buffer_length; static uint verbose=0,opt_silent=0,opt_mysql_port=0, opt_local_infile=0; -static uint opt_enable_cleartext_plugin= 0; -static my_bool using_opt_enable_cleartext_plugin= 0; static uint my_end_arg; static char * opt_mysql_unix_port=0; static int connect_flag=CLIENT_INTERACTIVE; @@ -1411,10 +1409,6 @@ static struct my_option my_long_options[] = &default_charset, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0}, {"delimiter", OPT_DELIMITER, "Delimiter to be used.", &delimiter_str, &delimiter_str, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0}, - {"enable_cleartext_plugin", OPT_ENABLE_CLEARTEXT_PLUGIN, - "Enable/disable the clear text authentication plugin.", - &opt_enable_cleartext_plugin, &opt_enable_cleartext_plugin, - 0, GET_BOOL, OPT_ARG, 0, 0, 0, 0, 0, 0}, {"execute", 'e', "Execute command and quit. (Disables --force and history file.)", 0, 0, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0}, {"vertical", 'E', "Print the output of a query (rows) vertically.", @@ -1642,9 +1636,6 @@ get_one_option(int optid, const struct my_option *opt __attribute__((unused)), case OPT_LOCAL_INFILE: using_opt_local_infile=1; break; - case OPT_ENABLE_CLEARTEXT_PLUGIN: - using_opt_enable_cleartext_plugin= TRUE; - break; case OPT_TEE: if (argument == disabled_my_option) { @@ -4330,10 +4321,6 @@ sql_real_connect(char *host,char *database,char *user,char *password, if (opt_default_auth && *opt_default_auth) mysql_options(&mysql, MYSQL_DEFAULT_AUTH, opt_default_auth); - if (using_opt_enable_cleartext_plugin) - mysql_options(&mysql, MYSQL_ENABLE_CLEARTEXT_PLUGIN, - (char*) &opt_enable_cleartext_plugin); - if (!mysql_real_connect(&mysql, host, user, password, database, opt_mysql_port, opt_mysql_unix_port, connect_flag | CLIENT_MULTI_STATEMENTS)) diff --git a/client/mysqladmin.cc b/client/mysqladmin.cc index 321efd36642..3f33c25e664 100644 --- a/client/mysqladmin.cc +++ b/client/mysqladmin.cc @@ -43,8 +43,6 @@ static uint opt_count_iterations= 0, my_end_arg; static ulong opt_connect_timeout, opt_shutdown_timeout; static char * unix_port=0; static char *opt_plugin_dir= 0, *opt_default_auth= 0; -static uint opt_enable_cleartext_plugin= 0; -static my_bool using_opt_enable_cleartext_plugin= 0; #ifdef HAVE_SMEM static char *shared_memory_base_name=0; @@ -214,10 +212,6 @@ static struct my_option my_long_options[] = "Default authentication client-side plugin to use.", &opt_default_auth, &opt_default_auth, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0}, - {"enable_cleartext_plugin", OPT_ENABLE_CLEARTEXT_PLUGIN, - "Enable/disable the clear text authentication plugin.", - &opt_enable_cleartext_plugin, &opt_enable_cleartext_plugin, - 0, GET_BOOL, OPT_ARG, 0, 0, 0, 0, 0, 0}, { 0, 0, 0, 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0} }; @@ -288,9 +282,6 @@ get_one_option(int optid, const struct my_option *opt __attribute__((unused)), opt_protocol= find_type_or_exit(argument, &sql_protocol_typelib, opt->name); break; - case OPT_ENABLE_CLEARTEXT_PLUGIN: - using_opt_enable_cleartext_plugin= TRUE; - break; } if (error) { @@ -363,10 +354,6 @@ int main(int argc,char *argv[]) if (opt_default_auth && *opt_default_auth) mysql_options(&mysql, MYSQL_DEFAULT_AUTH, opt_default_auth); - if (using_opt_enable_cleartext_plugin) - mysql_options(&mysql, MYSQL_ENABLE_CLEARTEXT_PLUGIN, - (char*) &opt_enable_cleartext_plugin); - if (sql_connect(&mysql, option_wait)) { /* diff --git a/client/mysqlslap.c b/client/mysqlslap.c index ac1cc31733c..a2c01b85b5a 100644 --- a/client/mysqlslap.c +++ b/client/mysqlslap.c @@ -125,8 +125,6 @@ static char *host= NULL, *opt_password= NULL, *user= NULL, *post_system= NULL, *opt_mysql_unix_port= NULL; static char *opt_plugin_dir= 0, *opt_default_auth= 0; -static uint opt_enable_cleartext_plugin= 0; -static my_bool using_opt_enable_cleartext_plugin= 0; const char *delimiter= "\n"; @@ -350,9 +348,6 @@ int main(int argc, char **argv) if (opt_default_auth && *opt_default_auth) mysql_options(&mysql, MYSQL_DEFAULT_AUTH, opt_default_auth); - if (using_opt_enable_cleartext_plugin) - mysql_options(&mysql, MYSQL_ENABLE_CLEARTEXT_PLUGIN, - (char*) &opt_enable_cleartext_plugin); if (!opt_only_print) { if (!(mysql_real_connect(&mysql, host, user, opt_password, @@ -608,10 +603,6 @@ static struct my_option my_long_options[] = "Detach (close and reopen) connections after X number of requests.", &detach_rate, &detach_rate, 0, GET_UINT, REQUIRED_ARG, 0, 0, 0, 0, 0, 0}, - {"enable_cleartext_plugin", OPT_ENABLE_CLEARTEXT_PLUGIN, - "Enable/disable the clear text authentication plugin.", - &opt_enable_cleartext_plugin, &opt_enable_cleartext_plugin, - 0, GET_BOOL, OPT_ARG, 0, 0, 0, 0, 0, 0}, {"engine", 'e', "Storage engine to use for creating the table.", &default_engine, &default_engine, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0}, @@ -770,9 +761,6 @@ get_one_option(int optid, const struct my_option *opt __attribute__((unused)), case 'I': /* Info */ usage(); exit(0); - case OPT_ENABLE_CLEARTEXT_PLUGIN: - using_opt_enable_cleartext_plugin= TRUE; - break; } DBUG_RETURN(0); } diff --git a/client/mysqltest.cc b/client/mysqltest.cc index 34d8edcbe0b..b1784fdc7b6 100644 --- a/client/mysqltest.cc +++ b/client/mysqltest.cc @@ -5456,7 +5456,7 @@ void do_connect(struct st_command *command) int con_port= opt_port; char *con_options; my_bool con_ssl= 0, con_compress= 0; - my_bool con_pipe= 0, con_shm= 0, con_cleartext_enable= 0; + my_bool con_pipe= 0, con_shm= 0; struct st_connection* con_slot; static DYNAMIC_STRING ds_connection_name; @@ -5546,8 +5546,6 @@ void do_connect(struct st_command *command) con_pipe= 1; else if (!strncmp(con_options, "SHM", 3)) con_shm= 1; - else if (!strncmp(con_options, "CLEARTEXT", 9)) - con_cleartext_enable= 1; else die("Illegal option to connect: %.*s", (int) (end - con_options), con_options); @@ -5644,10 +5642,6 @@ void do_connect(struct st_command *command) if (ds_default_auth.length) mysql_options(&con_slot->mysql, MYSQL_DEFAULT_AUTH, ds_default_auth.str); - - if (con_cleartext_enable) - mysql_options(&con_slot->mysql, MYSQL_ENABLE_CLEARTEXT_PLUGIN, - (char*) &con_cleartext_enable); /* Special database to allow one to connect without a database name */ if (ds_database.length && !strcmp(ds_database.str,"*NO-ONE*")) dynstr_set(&ds_database, ""); diff --git a/include/mysql.h b/include/mysql.h index 0ed35413a1c..cff8c647152 100644 --- a/include/mysql.h +++ b/include/mysql.h @@ -166,8 +166,7 @@ enum mysql_option MYSQL_OPT_USE_REMOTE_CONNECTION, MYSQL_OPT_USE_EMBEDDED_CONNECTION, MYSQL_OPT_GUESS_CONNECTION, MYSQL_SET_CLIENT_IP, MYSQL_SECURE_AUTH, MYSQL_REPORT_DATA_TRUNCATION, MYSQL_OPT_RECONNECT, - MYSQL_OPT_SSL_VERIFY_SERVER_CERT, MYSQL_PLUGIN_DIR, MYSQL_DEFAULT_AUTH, - MYSQL_ENABLE_CLEARTEXT_PLUGIN + MYSQL_OPT_SSL_VERIFY_SERVER_CERT, MYSQL_PLUGIN_DIR, MYSQL_DEFAULT_AUTH }; /** diff --git a/include/mysql.h.pp b/include/mysql.h.pp index c2c5ba35044..15ec563dfc2 100644 --- a/include/mysql.h.pp +++ b/include/mysql.h.pp @@ -262,8 +262,7 @@ enum mysql_option MYSQL_OPT_USE_REMOTE_CONNECTION, MYSQL_OPT_USE_EMBEDDED_CONNECTION, MYSQL_OPT_GUESS_CONNECTION, MYSQL_SET_CLIENT_IP, MYSQL_SECURE_AUTH, MYSQL_REPORT_DATA_TRUNCATION, MYSQL_OPT_RECONNECT, - MYSQL_OPT_SSL_VERIFY_SERVER_CERT, MYSQL_PLUGIN_DIR, MYSQL_DEFAULT_AUTH, - MYSQL_ENABLE_CLEARTEXT_PLUGIN + MYSQL_OPT_SSL_VERIFY_SERVER_CERT, MYSQL_PLUGIN_DIR, MYSQL_DEFAULT_AUTH }; struct st_mysql_options_extention; struct st_mysql_options { diff --git a/include/sql_common.h b/include/sql_common.h index a2ea3ac45e7..307b443d6d6 100644 --- a/include/sql_common.h +++ b/include/sql_common.h @@ -31,7 +31,6 @@ extern const char *not_error_sqlstate; struct st_mysql_options_extention { char *plugin_dir; char *default_auth; - my_bool enable_cleartext_plugin; }; typedef struct st_mysql_methods @@ -105,7 +104,6 @@ int mysql_client_plugin_init(); void mysql_client_plugin_deinit(); struct st_mysql_client_plugin; extern struct st_mysql_client_plugin *mysql_client_builtins[]; -extern my_bool libmysql_cleartext_plugin_enabled; #ifdef __cplusplus } diff --git a/mysql-test/t/plugin_auth.test b/mysql-test/t/plugin_auth.test index 75d3ef3e807..f169360cf2e 100644 --- a/mysql-test/t/plugin_auth.test +++ b/mysql-test/t/plugin_auth.test @@ -422,10 +422,10 @@ CREATE USER uplain@localhost IDENTIFIED WITH 'cleartext_plugin_server' --echo ## test plugin auth --disable_query_log --error ER_ACCESS_DENIED_ERROR : this should fail : no grant -connect(cleartext_fail_con,localhost,uplain,cleartext_test2,,,,CLEARTEXT); +connect(cleartext_fail_con,localhost,uplain,cleartext_test2); --enable_query_log -connect(cleartext_con,localhost,uplain,cleartext_test,,,,CLEARTEXT); +connect(cleartext_con,localhost,uplain,cleartext_test); connection cleartext_con; select USER(),CURRENT_USER(); diff --git a/sql-common/client.c b/sql-common/client.c index ef1e3c1b7d4..16beb27978e 100644 --- a/sql-common/client.c +++ b/sql-common/client.c @@ -1136,8 +1136,7 @@ static const char *default_options[]= "connect-timeout", "local-infile", "disable-local-infile", "ssl-cipher", "max-allowed-packet", "protocol", "shared-memory-base-name", "multi-results", "multi-statements", "multi-queries", "secure-auth", - "report-data-truncation", "plugin-dir", "default-auth", - "enable-cleartext-plugin", + "report-data-truncation", "plugin-dir", "default-auth", NullS }; enum option_id { @@ -1149,7 +1148,6 @@ enum option_id { OPT_ssl_cipher, OPT_max_allowed_packet, OPT_protocol, OPT_shared_memory_base_name, OPT_multi_results, OPT_multi_statements, OPT_multi_queries, OPT_secure_auth, OPT_report_data_truncation, OPT_plugin_dir, OPT_default_auth, - OPT_enable_cleartext_plugin, OPT_keep_this_one_last }; @@ -1182,27 +1180,14 @@ static int add_init_command(struct st_mysql_options *options, const char *cmd) return 0; } -#define ALLOCATE_EXTENSIONS(OPTS) \ +#define EXTENSION_SET_STRING(OPTS, X, STR) \ + if ((OPTS)->extension) \ + my_free((OPTS)->extension->X); \ + else \ (OPTS)->extension= (struct st_mysql_options_extention *) \ my_malloc(sizeof(struct st_mysql_options_extention), \ - MYF(MY_WME | MY_ZEROFILL)) \ - -#define ENSURE_EXTENSIONS_PRESENT(OPTS) \ - do { \ - if (!(OPTS)->extension) \ - ALLOCATE_EXTENSIONS(OPTS); \ - } while (0) - - -#define EXTENSION_SET_STRING(OPTS, X, STR) \ - do { \ - if ((OPTS)->extension) \ - my_free((OPTS)->extension->X); \ - else \ - ALLOCATE_EXTENSIONS(OPTS); \ - (OPTS)->extension->X= ((STR) != NULL) ? \ - my_strdup((STR), MYF(MY_WME)) : NULL; \ - } while (0) + MYF(MY_WME | MY_ZEROFILL)); \ + (OPTS)->extension->X= my_strdup((STR), MYF(MY_WME)); void mysql_read_default_options(struct st_mysql_options *options, const char *filename,const char *group) @@ -1401,13 +1386,6 @@ void mysql_read_default_options(struct st_mysql_options *options, case OPT_default_auth: EXTENSION_SET_STRING(options, default_auth, opt_arg); break; - - case OPT_enable_cleartext_plugin: - ENSURE_EXTENSIONS_PRESENT(options); - options->extension->enable_cleartext_plugin= - (!opt_arg || atoi(opt_arg) != 0) ? TRUE : FALSE; - break; - default: DBUG_PRINT("warning",("unknown option: %s",option[0])); } @@ -2804,27 +2782,6 @@ static void client_mpvio_info(MYSQL_PLUGIN_VIO *vio, mpvio_info(mpvio->mysql->net.vio, info); } - -my_bool libmysql_cleartext_plugin_enabled= 0; - -static my_bool check_plugin_enabled(MYSQL *mysql, auth_plugin_t *plugin) -{ - if (plugin == &clear_password_client_plugin && - (!libmysql_cleartext_plugin_enabled && - (!mysql->options.extension || - !mysql->options.extension->enable_cleartext_plugin))) - { - set_mysql_extended_error(mysql, CR_AUTH_PLUGIN_CANNOT_LOAD, - unknown_sqlstate, - ER(CR_AUTH_PLUGIN_CANNOT_LOAD), - clear_password_client_plugin.name, - "plugin not enabled"); - return TRUE; - } - return FALSE; -} - - /** Client side of the plugin driver authentication. @@ -2867,9 +2824,6 @@ int run_plugin_auth(MYSQL *mysql, char *data, uint data_len, auth_plugin_name= auth_plugin->name; } - if (check_plugin_enabled(mysql, auth_plugin)) - DBUG_RETURN(1); - DBUG_PRINT ("info", ("using plugin %s", auth_plugin_name)); mysql->net.last_errno= 0; /* just in case */ @@ -2961,9 +2915,6 @@ int run_plugin_auth(MYSQL *mysql, char *data, uint data_len, auth_plugin_name, MYSQL_CLIENT_AUTHENTICATION_PLUGIN))) DBUG_RETURN (1); - if (check_plugin_enabled(mysql, auth_plugin)) - DBUG_RETURN(1); - mpvio.plugin= auth_plugin; res= auth_plugin->authenticate_user((struct st_plugin_vio *)&mpvio, mysql); @@ -4172,11 +4123,6 @@ mysql_options(MYSQL *mysql,enum mysql_option option, const void *arg) case MYSQL_DEFAULT_AUTH: EXTENSION_SET_STRING(&mysql->options, default_auth, arg); break; - case MYSQL_ENABLE_CLEARTEXT_PLUGIN: - ENSURE_EXTENSIONS_PRESENT(&mysql->options); - mysql->options.extension->enable_cleartext_plugin= - (*(my_bool*) arg) ? TRUE : FALSE; - break; default: DBUG_RETURN(1); } @@ -4396,3 +4342,5 @@ static int clear_password_auth_client(MYSQL_PLUGIN_VIO *vio, MYSQL *mysql) return res ? CR_ERROR : CR_OK; } + + diff --git a/sql-common/client_plugin.c b/sql-common/client_plugin.c index 75faeb7ee97..4016f0744be 100644 --- a/sql-common/client_plugin.c +++ b/sql-common/client_plugin.c @@ -197,10 +197,6 @@ err1: static void load_env_plugins(MYSQL *mysql) { char *plugs, *free_env, *s= getenv("LIBMYSQL_PLUGINS"); - char *enable_cleartext_plugin= getenv("LIBMYSQL_ENABLE_CLEARTEXT_PLUGIN"); - - if (enable_cleartext_plugin && strchr("1Yy", enable_cleartext_plugin[0])) - libmysql_cleartext_plugin_enabled= 1; /* no plugins to load */ if(!s) @@ -216,7 +212,6 @@ static void load_env_plugins(MYSQL *mysql) } while (s); my_free(free_env); - } /********** extern functions to be used by libmysql *********************/ From 1aa6f042dab7a09dd86d96f934faa87df1c005c1 Mon Sep 17 00:00:00 2001 From: Michael Widenius Date: Wed, 8 Aug 2012 18:04:57 +0300 Subject: [PATCH 097/164] Better test case for MDEV-436 --- mysql-test/suite/heap/heap.result | 32 +++++++++++++++++++++++++++++-- mysql-test/suite/heap/heap.test | 25 ++++++++++++++++++++++-- 2 files changed, 53 insertions(+), 4 deletions(-) diff --git a/mysql-test/suite/heap/heap.result b/mysql-test/suite/heap/heap.result index 29ebf504e1a..ae562a0dda1 100644 --- a/mysql-test/suite/heap/heap.result +++ b/mysql-test/suite/heap/heap.result @@ -756,9 +756,37 @@ select data_length,index_length from information_schema.tables where table_schem data_length index_length 48000 72000 drop table t1; -CREATE TABLE t1 (a int, index(a)) engine=heap max_rows=4000; +CREATE TABLE t1 (a int, index(a)) engine=heap max_rows=15000; insert into t1 values(1); select data_length,index_length from information_schema.tables where table_schema="test" and table_name="t1"; data_length index_length -16000 24000 +24000 36000 +drop table t1; +create table t1 (c1 int, index(c1)) engine=heap max_rows=10000; +insert into t1 select rand(100000000); +insert into t1 select rand(100000000) from t1; +insert into t1 select rand(100000000) from t1; +insert into t1 select rand(100000000) from t1; +insert into t1 select rand(100000000) from t1; +insert into t1 select rand(100000000) from t1; +insert into t1 select rand(100000000) from t1; +insert into t1 select rand(100000000) from t1; +insert into t1 select rand(100000000) from t1; +insert into t1 select rand(100000000) from t1; +insert into t1 select rand(100000000) from t1 limit 488; +select data_length,index_length from information_schema.tables where table_schema="test" and table_name="t1"; +data_length index_length +16000 24000 +insert into t1 select rand(100000000) from t1 limit 1; +select data_length,index_length from information_schema.tables where table_schema="test" and table_name="t1"; +data_length index_length +33024 49024 +insert into t1 select rand(100000000) from t1 limit 1000; +select data_length,index_length from information_schema.tables where table_schema="test" and table_name="t1"; +data_length index_length +49024 73024 +insert into t1 select rand(100000000) from t1; +select data_length,index_length from information_schema.tables where table_schema="test" and table_name="t1"; +data_length index_length +81024 121024 drop table t1; diff --git a/mysql-test/suite/heap/heap.test b/mysql-test/suite/heap/heap.test index 062b48f2c31..681d3b422e7 100644 --- a/mysql-test/suite/heap/heap.test +++ b/mysql-test/suite/heap/heap.test @@ -489,7 +489,7 @@ DROP TABLE t1; # # Show that MIN_ROWS and MAX_ROWS have an effect on how data_length # and index_length are allocated. -# This is different for 32 and 64 bit machines as pointer lengths are different +# Result is different for 32 / 64 bit machines as pointer lengths are different # CREATE TABLE t1 (a int, index(a)) engine=heap min_rows=10 max_rows=100; @@ -504,7 +504,28 @@ CREATE TABLE t1 (a int, index(a)) engine=heap min_rows=3000 max_rows=3000; insert into t1 values(1); select data_length,index_length from information_schema.tables where table_schema="test" and table_name="t1"; drop table t1; -CREATE TABLE t1 (a int, index(a)) engine=heap max_rows=4000; +CREATE TABLE t1 (a int, index(a)) engine=heap max_rows=15000; insert into t1 values(1); select data_length,index_length from information_schema.tables where table_schema="test" and table_name="t1"; drop table t1; + +create table t1 (c1 int, index(c1)) engine=heap max_rows=10000; +insert into t1 select rand(100000000); +insert into t1 select rand(100000000) from t1; +insert into t1 select rand(100000000) from t1; +insert into t1 select rand(100000000) from t1; +insert into t1 select rand(100000000) from t1; +insert into t1 select rand(100000000) from t1; +insert into t1 select rand(100000000) from t1; +insert into t1 select rand(100000000) from t1; +insert into t1 select rand(100000000) from t1; +insert into t1 select rand(100000000) from t1; +insert into t1 select rand(100000000) from t1 limit 488; +select data_length,index_length from information_schema.tables where table_schema="test" and table_name="t1"; +insert into t1 select rand(100000000) from t1 limit 1; +select data_length,index_length from information_schema.tables where table_schema="test" and table_name="t1"; +insert into t1 select rand(100000000) from t1 limit 1000; +select data_length,index_length from information_schema.tables where table_schema="test" and table_name="t1"; +insert into t1 select rand(100000000) from t1; +select data_length,index_length from information_schema.tables where table_schema="test" and table_name="t1"; +drop table t1; From 7cc2f8decabe83fb304458748ba907f011848309 Mon Sep 17 00:00:00 2001 From: Sergei Golubchik Date: Thu, 9 Aug 2012 18:25:47 +0200 Subject: [PATCH 098/164] fix val_str_ascii to return a string in the ascii-compatible charset. two items didn't do that properly, one was exploitable, the other was not, but fixed anyway. --- mysql-test/r/ctype_utf32.result | 6 ++++++ mysql-test/t/ctype_utf32.test | 5 +++++ sql/item_geofunc.cc | 3 ++- 3 files changed, 13 insertions(+), 1 deletion(-) diff --git a/mysql-test/r/ctype_utf32.result b/mysql-test/r/ctype_utf32.result index 03f60261450..6cf24d768f7 100644 --- a/mysql-test/r/ctype_utf32.result +++ b/mysql-test/r/ctype_utf32.result @@ -1182,5 +1182,11 @@ a 256 Warnings: Warning 1260 Row 1 was cut by GROUP_CONCAT() # +# incorrect charset for val_str_ascii +# +SELECT '2010-10-10 10:10:10' + INTERVAL GeometryType(GeomFromText('POINT(1 1)')) hour_second; +'2010-10-10 10:10:10' + INTERVAL GeometryType(GeomFromText('POINT(1 1)')) hour_second +2010-10-10 10:10:10 +# # End of 5.5 tests # diff --git a/mysql-test/t/ctype_utf32.test b/mysql-test/t/ctype_utf32.test index 5fc01e4467e..91221b4f7c7 100644 --- a/mysql-test/t/ctype_utf32.test +++ b/mysql-test/t/ctype_utf32.test @@ -854,6 +854,11 @@ SELECT 'a' AS id, REPEAT('bla bla', 100) AS body) t1 GROUP BY id ORDER BY l DESC; +--echo # +--echo # incorrect charset for val_str_ascii +--echo # + +SELECT '2010-10-10 10:10:10' + INTERVAL GeometryType(GeomFromText('POINT(1 1)')) hour_second; --echo # --echo # End of 5.5 tests diff --git a/sql/item_geofunc.cc b/sql/item_geofunc.cc index fdd3cab8273..3648b10af3f 100644 --- a/sql/item_geofunc.cc +++ b/sql/item_geofunc.cc @@ -135,6 +135,7 @@ String *Item_func_as_wkt::val_str_ascii(String *str) return 0; str->length(0); + str->set_charset(&my_charset_latin1); if ((null_value= geom->as_wkt(str, &dummy))) return 0; @@ -182,7 +183,7 @@ String *Item_func_geometry_type::val_str_ascii(String *str) /* String will not move */ str->copy(geom->get_class_info()->m_name.str, geom->get_class_info()->m_name.length, - default_charset()); + &my_charset_latin1); return str; } From 16c763098ac5d0fd63e1e1b33e5a91ed6172a34d Mon Sep 17 00:00:00 2001 From: Sergei Golubchik Date: Fri, 10 Aug 2012 13:48:31 +0200 Subject: [PATCH 099/164] compiler warnings --- sql/sql_table.cc | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/sql/sql_table.cc b/sql/sql_table.cc index dbc79c01485..7bc0e348626 100644 --- a/sql/sql_table.cc +++ b/sql/sql_table.cc @@ -1966,13 +1966,13 @@ static uint32 comment_length(THD *thd, uint32 comment_pos, for (; query < query_end; query++) { - if (state_map[*query] == MY_LEX_SKIP) + if (state_map[static_cast(*query)] == MY_LEX_SKIP) continue; if (comment_pos-- == 0) break; } if (query > query_end - 3 /* comment can't be shorter than 4 */ || - state_map[*query] != MY_LEX_LONG_COMMENT || query[1] != '*') + state_map[static_cast(*query)] != MY_LEX_LONG_COMMENT || query[1] != '*') return 0; *comment_start= query; From c9b95de246ccaad22abf90996f295b05fe85f53d Mon Sep 17 00:00:00 2001 From: Sergei Golubchik Date: Sat, 11 Aug 2012 10:31:10 +0200 Subject: [PATCH 100/164] MDEV-336 oqgraph 5.5 crashes in buildbot compile oqgraph with -fno-strict-aliasing --- storage/oqgraph/CMakeLists.txt | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/storage/oqgraph/CMakeLists.txt b/storage/oqgraph/CMakeLists.txt index ecd2d46dad3..83acb99b2a2 100644 --- a/storage/oqgraph/CMakeLists.txt +++ b/storage/oqgraph/CMakeLists.txt @@ -26,7 +26,7 @@ IF(BOOST_OK) IF(MSVC) SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /EHsc") ELSE(MSVC) - SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-deprecated") + SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-deprecated -fno-strict-aliasing") STRING(REPLACE "-fno-exceptions" "" CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS}) STRING(REPLACE "-fno-implicit-templates" "" CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS}) ENDIF(MSVC) From 9ed96f5f8683d184ceb2e142350a70469125cace Mon Sep 17 00:00:00 2001 From: Sergei Golubchik Date: Mon, 13 Aug 2012 09:21:47 +0200 Subject: [PATCH 101/164] MDEV-286 mytop is not installed in 5.5 include mytop in bintars, rpms, and debs. install mysqlbug.1 too. --- debian/mariadb-client-5.5.files | 1 + man/CMakeLists.txt | 2 +- scripts/CMakeLists.txt | 3 ++- 3 files changed, 4 insertions(+), 2 deletions(-) diff --git a/debian/mariadb-client-5.5.files b/debian/mariadb-client-5.5.files index 9cb949ea53e..335f736d680 100644 --- a/debian/mariadb-client-5.5.files +++ b/debian/mariadb-client-5.5.files @@ -11,6 +11,7 @@ usr/bin/mysqlimport usr/bin/mysqlreport usr/bin/mysqlshow usr/bin/mysqlslap +usr/bin/mytop usr/bin/mysql_waitpid usr/share/lintian/overrides/mariadb-client-5.5 usr/share/man/man1/innotop.1 diff --git a/man/CMakeLists.txt b/man/CMakeLists.txt index d7ef1fae0bf..37f454c6d34 100644 --- a/man/CMakeLists.txt +++ b/man/CMakeLists.txt @@ -21,7 +21,7 @@ SET(MAN1_SERVER innochecksum.1 my_print_defaults.1 myisam_ftdump.1 myisamchk.1 mysql_tzinfo_to_sql.1 mysql_upgrade.1 mysql_zap.1 mysqld_multi.1 mysqld_safe.1 mysqldumpslow.1 mysqlhotcopy.1 mysqlman.1 mysqltest.1 perror.1 replace.1 resolve_stack_dump.1 - resolveip.1) + resolveip.1 mysqlbug.1) SET(MAN8_SERVER mysqld.8 mysqlmanager.8) SET(MAN1_CLIENT msql2mysql.1 mysql.1 mysql_find_rows.1 mysql_waitpid.1 mysqlaccess.1 mysqladmin.1 mysqlbinlog.1 mysqlcheck.1 diff --git a/scripts/CMakeLists.txt b/scripts/CMakeLists.txt index a0a2e446609..91a47bf3d48 100644 --- a/scripts/CMakeLists.txt +++ b/scripts/CMakeLists.txt @@ -283,6 +283,7 @@ SET(mysql_config_COMPONENT COMPONENT Development) SET(msql2mysql_COMPONENT COMPONENT Client) SET(mysqlaccess_COMPONENT COMPONENT Client) SET(mysql_find_rows_COMPONENT COMPONENT Client) +SET(mytop_COMPONENT Client) IF(WIN32) # On Windows, some .sh and some .pl.in files are configured @@ -311,7 +312,6 @@ IF(WIN32) ENDFOREACH() ELSE() # On Unix, most of the files end up in the bin directory - SET(mysql_config_COMPONENT COMPONENT Development) SET(BIN_SCRIPTS msql2mysql mysql_config @@ -322,6 +322,7 @@ ELSE() mysqlaccess mysql_convert_table_format mysql_find_rows + mytop mysqlhotcopy mysqldumpslow mysqld_multi From ecc03af9319f2a38ac4ae946ab6f7f4359e67316 Mon Sep 17 00:00:00 2001 From: Sergei Golubchik Date: Mon, 13 Aug 2012 11:14:43 +0200 Subject: [PATCH 102/164] MDEV-364 Server crashes in add_identifier on concurrent ALTER TABLE and SHOW ENGINE INNODB STATUS fix add_identifier() to distinguish between temporary tables (#sql- prefix) and temporary partitions (#TMP# suffix). change add_identifier() to use the same name variant constants as sql_partition.cc does. --- sql/sql_table.cc | 20 +++++++++++++------- 1 file changed, 13 insertions(+), 7 deletions(-) diff --git a/sql/sql_table.cc b/sql/sql_table.cc index 7bc0e348626..4cf94e61050 100644 --- a/sql/sql_table.cc +++ b/sql/sql_table.cc @@ -163,6 +163,13 @@ static char* add_identifier(THD* thd, char *to_p, const char * end_p, diagnostic, error etc. when it would be useful to know what a particular file [and directory] means. Such as SHOW ENGINE STATUS, error messages etc. + Examples: + + t1#P#p1 table t1 partition p1 + t1#P#p1#SP#sp1 table t1 partition p1 subpartition sp1 + t1#P#p1#SP#sp1#TMP# table t1 partition p1 subpartition sp1 temporary + t1#P#p1#SP#sp1#REN# table t1 partition p1 subpartition sp1 renamed + @param thd Thread handle @param from Path name in my_charset_filename Null terminated in my_charset_filename, normalized @@ -201,7 +208,7 @@ uint explain_filename(THD* thd, int part_name_len= 0; const char *subpart_name= NULL; int subpart_name_len= 0; - enum enum_file_name_type {NORMAL, TEMP, RENAMED} name_type= NORMAL; + uint name_variant= NORMAL_PART_NAME; const char *tmp_p; DBUG_ENTER("explain_filename"); DBUG_PRINT("enter", ("from '%s'", from)); @@ -244,7 +251,6 @@ uint explain_filename(THD* thd, (tmp_p[2] == 'L' || tmp_p[2] == 'l') && tmp_p[3] == '-') { - name_type= TEMP; tmp_p+= 4; /* sql- prefix found */ } else @@ -255,7 +261,7 @@ uint explain_filename(THD* thd, if ((tmp_p[1] == 'M' || tmp_p[1] == 'm') && (tmp_p[2] == 'P' || tmp_p[2] == 'p') && tmp_p[3] == '#' && !tmp_p[4]) - name_type= TEMP; + name_variant= TEMP_PART_NAME; else res= 3; tmp_p+= 4; @@ -265,7 +271,7 @@ uint explain_filename(THD* thd, if ((tmp_p[1] == 'E' || tmp_p[1] == 'e') && (tmp_p[2] == 'N' || tmp_p[2] == 'n') && tmp_p[3] == '#' && !tmp_p[4]) - name_type= RENAMED; + name_variant= RENAMED_PART_NAME; else res= 4; tmp_p+= 4; @@ -290,7 +296,7 @@ uint explain_filename(THD* thd, subpart_name_len= strlen(subpart_name); else part_name_len= strlen(part_name); - if (name_type != NORMAL) + if (name_variant != NORMAL_PART_NAME) { if (subpart_name) subpart_name_len-= 5; @@ -332,9 +338,9 @@ uint explain_filename(THD* thd, to_p= strnmov(to_p, " ", end_p - to_p); else to_p= strnmov(to_p, ", ", end_p - to_p); - if (name_type != NORMAL) + if (name_variant != NORMAL_PART_NAME) { - if (name_type == TEMP) + if (name_variant == TEMP_PART_NAME) to_p= strnmov(to_p, ER_THD_OR_DEFAULT(thd, ER_TEMPORARY_NAME), end_p - to_p); else From cee888acb36141136cdb121a7bb7d53200b14cb6 Mon Sep 17 00:00:00 2001 From: Michael Widenius Date: Mon, 13 Aug 2012 22:23:28 +0300 Subject: [PATCH 103/164] Fixed compiler warnings (A few of these was bugs) client/mysqldump.c: Slave needs to be initialized with 0 dbug/dbug.c: Removed not existing function plugin/semisync/semisync_master.cc: Fixed compiler warning sql/opt_range.cc: thd needs to be set early as it's used in some error conditions. sql/sql_table.cc: Changed to use uchar* to make array indexing portable storage/innobase/handler/ha_innodb.cc: Removed not used variable storage/maria/ma_delete.c: Fixed compiler warning storage/maria/ma_write.c: Fixed compiler warning --- client/mysqldump.c | 2 +- dbug/dbug.c | 3 --- plugin/semisync/semisync_master.cc | 3 ++- sql/opt_range.cc | 3 +-- sql/sql_table.cc | 9 +++++---- storage/innobase/handler/ha_innodb.cc | 2 +- storage/maria/ma_delete.c | 2 ++ storage/maria/ma_write.c | 2 ++ 8 files changed, 14 insertions(+), 12 deletions(-) diff --git a/client/mysqldump.c b/client/mysqldump.c index 3adbc897c50..32ac3a1ac59 100644 --- a/client/mysqldump.c +++ b/client/mysqldump.c @@ -4784,7 +4784,7 @@ static int add_slave_statements(void) static int do_show_slave_status(MYSQL *mysql_con) { - MYSQL_RES *slave; + MYSQL_RES *slave= 0; const char *comment_prefix= (opt_slave_data == MYSQL_OPT_SLAVE_DATA_COMMENTED_SQL) ? "-- " : ""; if (mysql_query_with_error_report(mysql_con, &slave, "SHOW SLAVE STATUS")) diff --git a/dbug/dbug.c b/dbug/dbug.c index af0a937ff07..b285b32fa17 100644 --- a/dbug/dbug.c +++ b/dbug/dbug.c @@ -284,9 +284,6 @@ static int DoTrace(CODE_STATE *cs); /* Test to see if file is writable */ #if defined(HAVE_ACCESS) static BOOLEAN Writable(const char *pathname); - /* Change file owner and group */ -static void ChangeOwner(CODE_STATE *cs, char *pathname); - /* Allocate memory for runtime support */ #endif static void DoPrefix(CODE_STATE *cs, uint line); diff --git a/plugin/semisync/semisync_master.cc b/plugin/semisync/semisync_master.cc index 8573c4dcbde..d1b982468d2 100644 --- a/plugin/semisync/semisync_master.cc +++ b/plugin/semisync/semisync_master.cc @@ -1049,10 +1049,11 @@ int ReplSemiSyncMaster::readSlaveReply(NET *net, uint32 server_id, ulong log_file_len = 0; ulong packet_len; int result = -1; - struct timespec start_ts; ulong trc_level = trace_level_; + LINT_INIT_STRUCT(start_ts); + function_enter(kWho); assert((unsigned char)event_buf[1] == kPacketMagicNum); diff --git a/sql/opt_range.cc b/sql/opt_range.cc index da328063e56..add46d148cf 100644 --- a/sql/opt_range.cc +++ b/sql/opt_range.cc @@ -2001,7 +2001,7 @@ int QUICK_RANGE_SELECT::init_ror_merged_scan(bool reuse_handler) { handler *save_file= file, *org_file; my_bool org_key_read; - THD *thd; + THD *thd= head->in_use; DBUG_ENTER("QUICK_RANGE_SELECT::init_ror_merged_scan"); in_ror_merged_scan= 1; @@ -2023,7 +2023,6 @@ int QUICK_RANGE_SELECT::init_ror_merged_scan(bool reuse_handler) DBUG_RETURN(0); } - thd= head->in_use; if (!(file= head->file->clone(head->s->normalized_path.str, thd->mem_root))) { /* diff --git a/sql/sql_table.cc b/sql/sql_table.cc index eb4ded0c502..77735853c68 100644 --- a/sql/sql_table.cc +++ b/sql/sql_table.cc @@ -1960,8 +1960,9 @@ bool mysql_rm_table(THD *thd,TABLE_LIST *tables, my_bool if_exists, static uint32 comment_length(THD *thd, uint32 comment_pos, const char **comment_start) { - const char *query= thd->query(); - const char *query_end= query + thd->query_length(); + /* We use uchar * here to make array indexing portable */ + const uchar *query= (uchar*) thd->query(); + const uchar *query_end= (uchar*) query + thd->query_length(); const uchar *const state_map= thd->charset()->state_map; for (; query < query_end; query++) @@ -1975,12 +1976,12 @@ static uint32 comment_length(THD *thd, uint32 comment_pos, state_map[*query] != MY_LEX_LONG_COMMENT || query[1] != '*') return 0; - *comment_start= query; + *comment_start= (char*) query; for (query+= 3; query < query_end; query++) { if (query[-1] == '*' && query[0] == '/') - return query - *comment_start + 1; + return (char*) query - *comment_start + 1; } return 0; } diff --git a/storage/innobase/handler/ha_innodb.cc b/storage/innobase/handler/ha_innodb.cc index 32295c5314f..0ef6f0209f7 100644 --- a/storage/innobase/handler/ha_innodb.cc +++ b/storage/innobase/handler/ha_innodb.cc @@ -11703,7 +11703,7 @@ static MYSQL_SYSVAR_ULONG(read_ahead_threshold, srv_read_ahead_threshold, "trigger a readahead.", NULL, NULL, 56, 0, 64, 0); -#ifdef UNIV_DEBUG +#ifdef UNIV_DEBUG_never static MYSQL_SYSVAR_UINT(trx_rseg_n_slots_debug, trx_rseg_n_slots_debug, PLUGIN_VAR_RQCMDARG, "Debug flags for InnoDB to limit TRX_RSEG_N_SLOTS for trx_rsegf_undo_find_free()", diff --git a/storage/maria/ma_delete.c b/storage/maria/ma_delete.c index 069d73b553c..5b8d0e01677 100644 --- a/storage/maria/ma_delete.c +++ b/storage/maria/ma_delete.c @@ -163,6 +163,8 @@ my_bool _ma_ck_delete(MARIA_HA *info, MARIA_KEY *key) MARIA_KEY org_key; DBUG_ENTER("_ma_ck_delete"); + LINT_INIT_STRUCT(org_key); + save_key_data= key->data; if (share->now_transactional) { diff --git a/storage/maria/ma_write.c b/storage/maria/ma_write.c index 74c1a106df2..f1649083105 100644 --- a/storage/maria/ma_write.c +++ b/storage/maria/ma_write.c @@ -478,6 +478,8 @@ static my_bool _ma_ck_write_btree_with_log(MARIA_HA *info, MARIA_KEY *key, my_bool transactional= share->now_transactional; DBUG_ENTER("_ma_ck_write_btree_with_log"); + LINT_INIT_STRUCT(org_key); + if (transactional) { /* Save original value as the key may change */ From d07b179fd2397bd78dd4f9ba7c54dda38fc1ce8c Mon Sep 17 00:00:00 2001 From: Igor Babaev Date: Mon, 13 Aug 2012 21:13:14 -0700 Subject: [PATCH 104/164] Fixed bug mdev-449. The bug could caused a crash when the server executed a query with ORDER by and sort_buffer_size was set to a small enough number. It happened because the small sort buffer did not allow to allocate all merge buffers in it. Made sure that the allocated sort buffer would be big enough to contain all possible merge buffers. --- mysql-test/r/order_by.result | 132 +++++++++++++++++++++++++++++++++++ mysql-test/t/order_by.test | 39 +++++++++++ sql/filesort.cc | 12 ++-- 3 files changed, 178 insertions(+), 5 deletions(-) diff --git a/mysql-test/r/order_by.result b/mysql-test/r/order_by.result index c0a54817b4c..8fa1006b8fc 100644 --- a/mysql-test/r/order_by.result +++ b/mysql-test/r/order_by.result @@ -1783,3 +1783,135 @@ Warnings: Note 1003 select `test`.`t2`.`b` AS `b` from `test`.`t1` join `test`.`t2` where (`test`.`t2`.`a` = `test`.`t1`.`b`) group by `test`.`t2`.`b` order by `test`.`t1`.`b` drop table t1,t2; End of 5.2 tests +# +# Bug mdev-449: ORDER BY with small sort_buffer_size +# +CREATE TABLE t1(f0 int auto_increment primary key, f1 int, f2 varchar(200)); +INSERT INTO t1(f1, f2) VALUES +(0,"0"),(1,"1"),(2,"2"),(3,"3"),(4,"4"),(5,"5"), +(6,"6"),(7,"7"),(8,"8"),(9,"9"),(10,"10"), +(11,"11"),(12,"12"),(13,"13"),(14,"14"),(15,"15"), +(16,"16"),(17,"17"),(18,"18"),(19,"19"),(20,"20"), +(21,"21"),(22,"22"),(23,"23"),(24,"24"),(25,"25"), +(26,"26"),(27,"27"),(28,"28"),(29,"29"),(30,"30"), +(31,"31"),(32,"32"),(33,"33"),(34,"34"),(35,"35"), +(36,"36"),(37,"37"),(38,"38"),(39,"39"),(40,"40"), +(41,"41"),(42,"42"),(43,"43"),(44,"44"),(45,"45"), +(46,"46"),(47,"47"),(48,"48"),(49,"49"),(50,"50"), +(51,"51"),(52,"52"),(53,"53"),(54,"54"),(55,"55"), +(56,"56"),(57,"57"),(58,"58"),(59,"59"),(60,"60"), +(61,"61"),(62,"62"),(63,"63"),(64,"64"),(65,"65"), +(66,"66"),(67,"67"),(68,"68"),(69,"69"),(70,"70"), +(71,"71"),(72,"72"),(73,"73"),(74,"74"),(75,"75"), +(76,"76"),(77,"77"),(78,"78"),(79,"79"),(80,"80"), +(81,"81"),(82,"82"),(83,"83"),(84,"84"),(85,"85"), +(86,"86"),(87,"87"),(88,"88"),(89,"89"),(90,"90"), +(91,"91"),(92,"92"),(93,"93"),(94,"94"),(95,"95"), +(96,"96"),(97,"97"),(98,"98"),(99,"99"); +set @save_sort_buffer_size= @@sort_buffer_size; +set sort_buffer_size= 2000; +SELECT * FROM t1 ORDER BY f1 DESC, f0; +f0 f1 f2 +100 99 99 +99 98 98 +98 97 97 +97 96 96 +96 95 95 +95 94 94 +94 93 93 +93 92 92 +92 91 91 +91 90 90 +90 89 89 +89 88 88 +88 87 87 +87 86 86 +86 85 85 +85 84 84 +84 83 83 +83 82 82 +82 81 81 +81 80 80 +80 79 79 +79 78 78 +78 77 77 +77 76 76 +76 75 75 +75 74 74 +74 73 73 +73 72 72 +72 71 71 +71 70 70 +70 69 69 +69 68 68 +68 67 67 +67 66 66 +66 65 65 +65 64 64 +64 63 63 +63 62 62 +62 61 61 +61 60 60 +60 59 59 +59 58 58 +58 57 57 +57 56 56 +56 55 55 +55 54 54 +54 53 53 +53 52 52 +52 51 51 +51 50 50 +50 49 49 +49 48 48 +48 47 47 +47 46 46 +46 45 45 +45 44 44 +44 43 43 +43 42 42 +42 41 41 +41 40 40 +40 39 39 +39 38 38 +38 37 37 +37 36 36 +36 35 35 +35 34 34 +34 33 33 +33 32 32 +32 31 31 +31 30 30 +30 29 29 +29 28 28 +28 27 27 +27 26 26 +26 25 25 +25 24 24 +24 23 23 +23 22 22 +22 21 21 +21 20 20 +20 19 19 +19 18 18 +18 17 17 +17 16 16 +16 15 15 +15 14 14 +14 13 13 +13 12 12 +12 11 11 +11 10 10 +10 9 9 +9 8 8 +8 7 7 +7 6 6 +6 5 5 +5 4 4 +4 3 3 +3 2 2 +2 1 1 +1 0 0 +set sort_buffer_size= @save_sort_buffer_size; +DROP TABLE t1; +End of 5.3 tests diff --git a/mysql-test/t/order_by.test b/mysql-test/t/order_by.test index 425bef6c679..1d81248b81e 100644 --- a/mysql-test/t/order_by.test +++ b/mysql-test/t/order_by.test @@ -1589,3 +1589,42 @@ SELECT t2.b FROM t1, t2 WHERE t1.b = t2.a GROUP BY t2.b ORDER BY t1.b; drop table t1,t2; --echo End of 5.2 tests + +--echo # +--echo # Bug mdev-449: ORDER BY with small sort_buffer_size +--echo # + +CREATE TABLE t1(f0 int auto_increment primary key, f1 int, f2 varchar(200)); +INSERT INTO t1(f1, f2) VALUES +(0,"0"),(1,"1"),(2,"2"),(3,"3"),(4,"4"),(5,"5"), +(6,"6"),(7,"7"),(8,"8"),(9,"9"),(10,"10"), +(11,"11"),(12,"12"),(13,"13"),(14,"14"),(15,"15"), +(16,"16"),(17,"17"),(18,"18"),(19,"19"),(20,"20"), +(21,"21"),(22,"22"),(23,"23"),(24,"24"),(25,"25"), +(26,"26"),(27,"27"),(28,"28"),(29,"29"),(30,"30"), +(31,"31"),(32,"32"),(33,"33"),(34,"34"),(35,"35"), +(36,"36"),(37,"37"),(38,"38"),(39,"39"),(40,"40"), +(41,"41"),(42,"42"),(43,"43"),(44,"44"),(45,"45"), +(46,"46"),(47,"47"),(48,"48"),(49,"49"),(50,"50"), +(51,"51"),(52,"52"),(53,"53"),(54,"54"),(55,"55"), +(56,"56"),(57,"57"),(58,"58"),(59,"59"),(60,"60"), +(61,"61"),(62,"62"),(63,"63"),(64,"64"),(65,"65"), +(66,"66"),(67,"67"),(68,"68"),(69,"69"),(70,"70"), +(71,"71"),(72,"72"),(73,"73"),(74,"74"),(75,"75"), +(76,"76"),(77,"77"),(78,"78"),(79,"79"),(80,"80"), +(81,"81"),(82,"82"),(83,"83"),(84,"84"),(85,"85"), +(86,"86"),(87,"87"),(88,"88"),(89,"89"),(90,"90"), +(91,"91"),(92,"92"),(93,"93"),(94,"94"),(95,"95"), +(96,"96"),(97,"97"),(98,"98"),(99,"99"); + +set @save_sort_buffer_size= @@sort_buffer_size; +set sort_buffer_size= 2000; + +SELECT * FROM t1 ORDER BY f1 DESC, f0; + +set sort_buffer_size= @save_sort_buffer_size; + +DROP TABLE t1; + +--echo End of 5.3 tests + diff --git a/sql/filesort.cc b/sql/filesort.cc index 772698c6e1a..4d06317447a 100644 --- a/sql/filesort.cc +++ b/sql/filesort.cc @@ -102,6 +102,7 @@ ha_rows filesort(THD *thd, TABLE *table, SORT_FIELD *sortorder, uint s_length, { int error; ulong memavl, min_sort_memory; + ulong sort_buff_sz; uint maxbuffer; BUFFPEK *buffpek; ha_rows records= HA_POS_ERROR; @@ -210,6 +211,7 @@ ha_rows filesort(THD *thd, TABLE *table, SORT_FIELD *sortorder, uint s_length, memavl= thd->variables.sortbuff_size; min_sort_memory= max(MIN_SORT_MEMORY, param.sort_length*MERGEBUFF2); + set_if_bigger(min_sort_memory, sizeof(BUFFPEK*)*MERGEBUFF2); if (!table_sort.sort_keys) { while (memavl >= min_sort_memory) @@ -217,9 +219,10 @@ ha_rows filesort(THD *thd, TABLE *table, SORT_FIELD *sortorder, uint s_length, ulong old_memavl; ulong keys= memavl/(param.rec_length+sizeof(char*)); table_sort.keys= (uint) min(records+1, keys); + sort_buff_sz= table_sort.keys*(param.rec_length+sizeof(char*)); + set_if_bigger(sort_buff_sz, param.rec_length * MERGEBUFF2); if ((table_sort.sort_keys= - (uchar**) my_malloc(table_sort.keys*(param.rec_length+sizeof(char*)), - MYF(0)))) + (uchar**) my_malloc(sort_buff_sz, MYF(0)))) break; old_memavl=memavl; if ((memavl=memavl/4*3) < min_sort_memory && @@ -282,8 +285,7 @@ ha_rows filesort(THD *thd, TABLE *table, SORT_FIELD *sortorder, uint s_length, Use also the space previously used by string pointers in sort_buffer for temporary key storage. */ - param.keys=((param.keys*(param.rec_length+sizeof(char*))) / - param.rec_length-1); + param.keys= sort_buff_sz / param.rec_length; maxbuffer--; // Offset from 0 if (merge_many_buff(¶m,(uchar*) sort_keys,buffpek,&maxbuffer, &tempfile)) @@ -1257,7 +1259,7 @@ int merge_buffers(SORTPARAM *param, IO_CACHE *from_file, to_start_filepos= my_b_tell(to_file); strpos= sort_buffer; org_max_rows=max_rows= param->max_rows; - + /* The following will fire if there is not enough space in sort_buffer */ DBUG_ASSERT(maxcount!=0); From 47929af5e08455a8f59840c17cb6de7b5296ebab Mon Sep 17 00:00:00 2001 From: unknown Date: Tue, 14 Aug 2012 12:40:40 +0200 Subject: [PATCH 105/164] MDEV-450: Deadlock between starting a slave and reading system variables Starting the SQL thread might deadlock with reading the values of the replication filtering options. The deadlock is due to a lock order violation when the variables are read or set. For example, reading replicate_ignore_table first acquires LOCK_global_system_variables in sys_var::value_ptr and later acquires LOCK_active_mi in Sys_var_rpl_filter::global_value_ptr. This violates the order established when starting a SQL thread, where LOCK_active_mi is acquired before start_slave, and ends up creating a thread (handle_slave_sql) that allocates a THD handle whose constructor acquires LOCK_global_system_variables in THD::init. The solution is to unlock LOCK_global_system_variables before the replication filtering options are set or read. This way the lock order is preserved and the data being read/set is still protected given that it acquires LOCK_active_mi. --- .../rpl_start_slave_deadlock_sys_vars.result | 31 ++++++++++ .../t/rpl_start_slave_deadlock_sys_vars.test | 57 +++++++++++++++++++ sql/slave.cc | 3 +- sql/sys_vars.cc | 51 ++++++++++++++--- sql/sys_vars.h | 2 + 5 files changed, 134 insertions(+), 10 deletions(-) create mode 100644 mysql-test/suite/rpl/r/rpl_start_slave_deadlock_sys_vars.result create mode 100644 mysql-test/suite/rpl/t/rpl_start_slave_deadlock_sys_vars.test diff --git a/mysql-test/suite/rpl/r/rpl_start_slave_deadlock_sys_vars.result b/mysql-test/suite/rpl/r/rpl_start_slave_deadlock_sys_vars.result new file mode 100644 index 00000000000..f69a323f980 --- /dev/null +++ b/mysql-test/suite/rpl/r/rpl_start_slave_deadlock_sys_vars.result @@ -0,0 +1,31 @@ +include/master-slave.inc +[connection master] +# connection: slave +SET @save_slave_net_timeout = @@GLOBAL.slave_net_timeout; +STOP SLAVE; +include/wait_for_slave_to_stop.inc +# open an extra connection to the slave +# connection: slave2 +# set debug synchronization point +SET DEBUG_SYNC='fix_slave_net_timeout SIGNAL parked WAIT_FOR go'; +# attempt to set slave_net_timeout, will wait on sync point +SET @@GLOBAL.slave_net_timeout = 100; +# connection: slave +SET DEBUG_SYNC='now WAIT_FOR parked'; +# connection: slave1 +# attempt to start the SQL thread +START SLAVE SQL_THREAD; +# connection: slave +# wait until SQL thread has been started +# sleep a bit so that the SQL thread THD handle is initialized +# signal the set slave_net_timeout to continue +SET DEBUG_SYNC='now SIGNAL go'; +# connection: slave2 +# reap result of set slave_net_timeout +# connection: slave1 +# reap result of starting the SQL thread +# disconnect: slave2 +# connection: slave +# cleanup +SET @@GLOBAL.slave_net_timeout = @save_slave_net_timeout; +include/rpl_end.inc diff --git a/mysql-test/suite/rpl/t/rpl_start_slave_deadlock_sys_vars.test b/mysql-test/suite/rpl/t/rpl_start_slave_deadlock_sys_vars.test new file mode 100644 index 00000000000..dfcec6758b3 --- /dev/null +++ b/mysql-test/suite/rpl/t/rpl_start_slave_deadlock_sys_vars.test @@ -0,0 +1,57 @@ +source include/master-slave.inc; +source include/have_debug_sync.inc; + +--echo # connection: slave +connection slave; +SET @save_slave_net_timeout = @@GLOBAL.slave_net_timeout; +STOP SLAVE; +source include/wait_for_slave_to_stop.inc; + +--echo # open an extra connection to the slave +connect(slave2,127.0.0.1,root,,test,$SLAVE_MYPORT,); +--echo # connection: slave2 +--echo # set debug synchronization point +SET DEBUG_SYNC='fix_slave_net_timeout SIGNAL parked WAIT_FOR go'; +--echo # attempt to set slave_net_timeout, will wait on sync point +--send SET @@GLOBAL.slave_net_timeout = 100 + +--echo # connection: slave +connection slave; +SET DEBUG_SYNC='now WAIT_FOR parked'; + +--echo # connection: slave1 +connection slave1; +--echo # attempt to start the SQL thread +--send START SLAVE SQL_THREAD + +--echo # connection: slave +connection slave; +--echo # wait until SQL thread has been started +let $wait_condition= + select count(*) = 1 from information_schema.processlist + where state = "Waiting for slave thread to start" and info = "START SLAVE SQL_THREAD"; +--source include/wait_condition.inc +--echo # sleep a bit so that the SQL thread THD handle is initialized +sleep 2; +--echo # signal the set slave_net_timeout to continue +SET DEBUG_SYNC='now SIGNAL go'; + +--echo # connection: slave2 +connection slave2; +--echo # reap result of set slave_net_timeout +--reap + +--echo # connection: slave1 +connection slave1; +--echo # reap result of starting the SQL thread +--reap + +--echo # disconnect: slave2 +disconnect slave2; + +--echo # connection: slave +connection slave; +--echo # cleanup +SET @@GLOBAL.slave_net_timeout = @save_slave_net_timeout; + +source include/rpl_end.inc; diff --git a/sql/slave.cc b/sql/slave.cc index 9149cd82d5e..7b7fd12e267 100644 --- a/sql/slave.cc +++ b/sql/slave.cc @@ -3005,6 +3005,8 @@ pthread_handler_t handle_slave_io(void *arg) mysql= NULL ; retry_count= 0; + thd= new THD; // note that contructor of THD uses DBUG_ ! + mysql_mutex_lock(&mi->run_lock); /* Inform waiting threads that slave has started */ mi->slave_run_id++; @@ -3013,7 +3015,6 @@ pthread_handler_t handle_slave_io(void *arg) mi->events_till_disconnect = disconnect_slave_event_count; #endif - thd= new THD; // note that contructor of THD uses DBUG_ ! THD_CHECK_SENTRY(thd); mi->io_thd = thd; diff --git a/sql/sys_vars.cc b/sql/sys_vars.cc index 6cc9c9577ee..2fdba7fda82 100644 --- a/sql/sys_vars.cc +++ b/sql/sys_vars.cc @@ -47,6 +47,7 @@ #include "sql_base.h" // close_cached_tables #include #include "log_slow.h" +#include "debug_sync.h" // DEBUG_SYNC #include "log_event.h" #ifdef WITH_PERFSCHEMA_STORAGE_ENGINE @@ -3256,6 +3257,13 @@ bool Sys_var_rpl_filter::do_check(THD *thd, set_var *var) { bool status; + /* + We must not be holding LOCK_global_system_variables here, otherwise we can + deadlock with THD::init() which is invoked from within the slave threads + with opposite locking order. + */ + mysql_mutex_assert_not_owner(&LOCK_global_system_variables); + mysql_mutex_lock(&LOCK_active_mi); mysql_mutex_lock(&active_mi->rli.run_lock); @@ -3272,22 +3280,43 @@ bool Sys_var_rpl_filter::do_check(THD *thd, set_var *var) return status; } +void Sys_var_rpl_filter::lock(void) +{ + /* + Starting a slave thread causes the new thread to attempt to + acquire LOCK_global_system_variables (in THD::init) while + LOCK_active_mi is being held by the thread that initiated + the process. In order to not violate the lock order, unlock + LOCK_global_system_variables before grabbing LOCK_active_mi. + */ + mysql_mutex_unlock(&LOCK_global_system_variables); + + mysql_mutex_lock(&LOCK_active_mi); + mysql_mutex_lock(&active_mi->rli.run_lock); +} + +void Sys_var_rpl_filter::unlock(void) +{ + mysql_mutex_unlock(&active_mi->rli.run_lock); + mysql_mutex_unlock(&LOCK_active_mi); + + mysql_mutex_lock(&LOCK_global_system_variables); +} + bool Sys_var_rpl_filter::global_update(THD *thd, set_var *var) { bool slave_running, status= false; - mysql_mutex_lock(&LOCK_active_mi); - mysql_mutex_lock(&active_mi->rli.run_lock); + lock(); if (! (slave_running= active_mi->rli.slave_running)) status= set_filter_value(var->save_result.string_value.str); - mysql_mutex_unlock(&active_mi->rli.run_lock); - mysql_mutex_unlock(&LOCK_active_mi); - if (slave_running) my_error(ER_SLAVE_MUST_STOP, MYF(0)); + unlock(); + return slave_running || status; } @@ -3326,8 +3355,7 @@ uchar *Sys_var_rpl_filter::global_value_ptr(THD *thd, LEX_STRING *base) tmp.length(0); - mysql_mutex_lock(&LOCK_active_mi); - mysql_mutex_lock(&active_mi->rli.run_lock); + lock(); switch (opt_id) { case OPT_REPLICATE_DO_DB: @@ -3350,8 +3378,7 @@ uchar *Sys_var_rpl_filter::global_value_ptr(THD *thd, LEX_STRING *base) break; } - mysql_mutex_unlock(&active_mi->rli.run_lock); - mysql_mutex_unlock(&LOCK_active_mi); + unlock(); return (uchar *) thd->strmake(tmp.ptr(), tmp.length()); } @@ -3404,6 +3431,9 @@ static Sys_var_charptr Sys_slave_load_tmpdir( static bool fix_slave_net_timeout(sys_var *self, THD *thd, enum_var_type type) { + DEBUG_SYNC(thd, "fix_slave_net_timeout"); + + mysql_mutex_unlock(&LOCK_global_system_variables); mysql_mutex_lock(&LOCK_active_mi); DBUG_PRINT("info", ("slave_net_timeout=%u mi->heartbeat_period=%.3f", slave_net_timeout, @@ -3413,6 +3443,7 @@ static bool fix_slave_net_timeout(sys_var *self, THD *thd, enum_var_type type) ER_SLAVE_HEARTBEAT_VALUE_OUT_OF_RANGE_MAX, ER(ER_SLAVE_HEARTBEAT_VALUE_OUT_OF_RANGE_MAX)); mysql_mutex_unlock(&LOCK_active_mi); + mysql_mutex_lock(&LOCK_global_system_variables); return false; } static Sys_var_uint Sys_slave_net_timeout( @@ -3439,6 +3470,7 @@ static bool check_slave_skip_counter(sys_var *self, THD *thd, set_var *var) } static bool fix_slave_skip_counter(sys_var *self, THD *thd, enum_var_type type) { + mysql_mutex_unlock(&LOCK_global_system_variables); mysql_mutex_lock(&LOCK_active_mi); mysql_mutex_lock(&active_mi->rli.run_lock); /* @@ -3454,6 +3486,7 @@ static bool fix_slave_skip_counter(sys_var *self, THD *thd, enum_var_type type) } mysql_mutex_unlock(&active_mi->rli.run_lock); mysql_mutex_unlock(&LOCK_active_mi); + mysql_mutex_lock(&LOCK_global_system_variables); return 0; } static Sys_var_uint Sys_slave_skip_counter( diff --git a/sql/sys_vars.h b/sql/sys_vars.h index 4ea6b1f036e..5bec56a78cc 100644 --- a/sql/sys_vars.h +++ b/sql/sys_vars.h @@ -588,6 +588,8 @@ public: protected: uchar *global_value_ptr(THD *thd, LEX_STRING *base); bool set_filter_value(const char *value); + void lock(void); + void unlock(void); }; /** From b886cac7123bc37d055fecd49d9a30ce0c39da73 Mon Sep 17 00:00:00 2001 From: Michael Widenius Date: Tue, 14 Aug 2012 19:59:28 +0300 Subject: [PATCH 106/164] Fixed compiler errors Updated test to also work on 32 bit mysql-test/suite/heap/heap.test: Updated test to also work on 32 bit --- mysql-test/suite/heap/heap.test | 8 ++++++++ sql/create_options.cc | 5 ++++- sql/ha_partition.cc | 2 +- sql/item_subselect.cc | 21 +++++++++++++++------ sql/multi_range_read.cc | 2 +- sql/sql_parse.cc | 2 +- sql/sql_select.cc | 3 ++- storage/innobase/log/log0recv.c | 2 +- storage/maria/ha_maria.cc | 2 +- storage/maria/ma_blockrec.c | 2 ++ storage/maria/ma_ft_nlq_search.c | 2 ++ storage/maria/ma_key_recover.c | 7 ++++++- storage/maria/ma_pagecache.c | 1 + storage/maria/ma_search.c | 4 ++++ storage/myisam/ft_nlq_search.c | 1 + storage/xtradb/handler/ha_innodb.cc | 12 ++++++------ storage/xtradb/log/log0recv.c | 2 +- strings/ctype-ucs2.c | 9 +++++++-- 18 files changed, 64 insertions(+), 23 deletions(-) diff --git a/mysql-test/suite/heap/heap.test b/mysql-test/suite/heap/heap.test index 681d3b422e7..6f5046af139 100644 --- a/mysql-test/suite/heap/heap.test +++ b/mysql-test/suite/heap/heap.test @@ -494,18 +494,22 @@ DROP TABLE t1; CREATE TABLE t1 (a int, index(a)) engine=heap min_rows=10 max_rows=100; insert into t1 values(1); +--replace_result 800 1600 1200 2400 select data_length,index_length from information_schema.tables where table_schema="test" and table_name="t1"; drop table t1; CREATE TABLE t1 (a int, index(a)) engine=heap min_rows=10 max_rows=10000; insert into t1 values(1); +--replace_result 8000 16000 12000 24000 select data_length,index_length from information_schema.tables where table_schema="test" and table_name="t1"; drop table t1; CREATE TABLE t1 (a int, index(a)) engine=heap min_rows=3000 max_rows=3000; insert into t1 values(1); +--replace_result 24000 48000 36000 72000 select data_length,index_length from information_schema.tables where table_schema="test" and table_name="t1"; drop table t1; CREATE TABLE t1 (a int, index(a)) engine=heap max_rows=15000; insert into t1 values(1); +--replace_result 12000 24000 18000 36000 select data_length,index_length from information_schema.tables where table_schema="test" and table_name="t1"; drop table t1; @@ -521,11 +525,15 @@ insert into t1 select rand(100000000) from t1; insert into t1 select rand(100000000) from t1; insert into t1 select rand(100000000) from t1; insert into t1 select rand(100000000) from t1 limit 488; +--replace_result 8000 16000 12000 24000 select data_length,index_length from information_schema.tables where table_schema="test" and table_name="t1"; insert into t1 select rand(100000000) from t1 limit 1; +--replace_result 16512 33024 24512 49024 select data_length,index_length from information_schema.tables where table_schema="test" and table_name="t1"; insert into t1 select rand(100000000) from t1 limit 1000; +--replace_result 24512 49024 36512 73024 select data_length,index_length from information_schema.tables where table_schema="test" and table_name="t1"; insert into t1 select rand(100000000) from t1; +--replace_result 40512 81024 60512 121024 select data_length,index_length from information_schema.tables where table_schema="test" and table_name="t1"; drop table t1; diff --git a/sql/create_options.cc b/sql/create_options.cc index 9a6f6b5cf7c..e4881388688 100644 --- a/sql/create_options.cc +++ b/sql/create_options.cc @@ -137,7 +137,10 @@ static bool set_one_value(ha_create_table_option *opt, my_option optp= { opt->name, 1, 0, (uchar **)val, 0, 0, GET_ULL, - REQUIRED_ARG, opt->def_value, opt->min_value, opt->max_value, + REQUIRED_ARG, + (longlong) opt->def_value, + (longlong) opt->min_value, + opt->max_value, 0, (long) opt->block_size, 0}; ulonglong orig_val= strtoull(value->str, NULL, 10); diff --git a/sql/ha_partition.cc b/sql/ha_partition.cc index 0d2b4387327..b3f97d35033 100644 --- a/sql/ha_partition.cc +++ b/sql/ha_partition.cc @@ -3837,7 +3837,7 @@ int ha_partition::truncate_partition(Alter_info *alter_info, bool *binlog_stmt) { List_iterator subpart_it(part_elem->subpartitions); - partition_element *sub_elem; + partition_element *sub_elem __attribute__((unused)); uint j= 0, part; do { diff --git a/sql/item_subselect.cc b/sql/item_subselect.cc index 49d232d31be..8b9904ea260 100644 --- a/sql/item_subselect.cc +++ b/sql/item_subselect.cc @@ -5167,10 +5167,16 @@ Ordered_key::cmp_keys_by_row_data(ha_rows a, ha_rows b) rowid_a= row_num_to_rowid + a * rowid_length; rowid_b= row_num_to_rowid + b * rowid_length; /* Fetch the rows for comparison. */ - error= tbl->file->ha_rnd_pos(tbl->record[0], rowid_a); - DBUG_ASSERT(!error); - error= tbl->file->ha_rnd_pos(tbl->record[1], rowid_b); - DBUG_ASSERT(!error); + if ((error= tbl->file->ha_rnd_pos(tbl->record[0], rowid_a))) + { + tbl->file->print_error(error, MYF(ME_FATALERROR)); // Sets fatal_error + return 0; + } + if ((error= tbl->file->ha_rnd_pos(tbl->record[1], rowid_b))) + { + tbl->file->print_error(error, MYF(ME_FATALERROR)); // Sets fatal_error + return 0; + } /* Compare the two rows by the corresponding values of the indexed columns. @@ -5245,8 +5251,11 @@ int Ordered_key::cmp_key_with_search_key(rownum_t row_num) uchar *cur_rowid= row_num_to_rowid + row_num * rowid_length; int error, cmp_res; - error= tbl->file->ha_rnd_pos(tbl->record[0], cur_rowid); - DBUG_ASSERT(!error); + if ((error= tbl->file->ha_rnd_pos(tbl->record[0], cur_rowid))) + { + tbl->file->print_error(error, MYF(ME_FATALERROR)); // Sets fatal_error + return 0; + } for (uint i= 0; i < key_column_count; i++) { diff --git a/sql/multi_range_read.cc b/sql/multi_range_read.cc index 7268491c0f4..800602fe9e1 100644 --- a/sql/multi_range_read.cc +++ b/sql/multi_range_read.cc @@ -1404,7 +1404,7 @@ ha_rows DsMrr_impl::dsmrr_info(uint keyno, uint n_ranges, uint rows, uint key_parts, uint *bufsz, uint *flags, COST_VECT *cost) { - ha_rows res; + ha_rows res __attribute__((unused)); uint def_flags= *flags; uint def_bufsz= *bufsz; diff --git a/sql/sql_parse.cc b/sql/sql_parse.cc index 49014db9505..6f157c89ee2 100644 --- a/sql/sql_parse.cc +++ b/sql/sql_parse.cc @@ -1325,7 +1325,7 @@ bool dispatch_command(enum enum_server_command command, THD *thd, { STATUS_VAR *current_global_status_var; // Big; Don't allocate on stack ulong uptime; - uint length; + uint length __attribute__((unused)); ulonglong queries_per_second1000; char buff[250]; uint buff_len= sizeof(buff); diff --git a/sql/sql_select.cc b/sql/sql_select.cc index da43b4b5e30..165e257d42d 100644 --- a/sql/sql_select.cc +++ b/sql/sql_select.cc @@ -6408,7 +6408,8 @@ greedy_search(JOIN *join, uint size_remain; // cardinality of remaining_tables POSITION best_pos; JOIN_TAB *best_table; // the next plan node to be added to the curr QEP - uint n_tables; // ==join->tables or # tables in the sj-mat nest we're optimizing + // ==join->tables or # tables in the sj-mat nest we're optimizing + uint n_tables __attribute__((unused)); DBUG_ENTER("greedy_search"); diff --git a/storage/innobase/log/log0recv.c b/storage/innobase/log/log0recv.c index f9e0fecb6c6..6c55a1badc5 100644 --- a/storage/innobase/log/log0recv.c +++ b/storage/innobase/log/log0recv.c @@ -2900,7 +2900,7 @@ recv_recovery_from_checkpoint_start_func( ib_uint64_t checkpoint_lsn; ib_uint64_t checkpoint_no; ib_uint64_t old_scanned_lsn; - ib_uint64_t group_scanned_lsn; + ib_uint64_t group_scanned_lsn= 0; ib_uint64_t contiguous_lsn; #ifdef UNIV_LOG_ARCHIVE ib_uint64_t archived_lsn; diff --git a/storage/maria/ha_maria.cc b/storage/maria/ha_maria.cc index e763b7e7a37..785fe5d8226 100644 --- a/storage/maria/ha_maria.cc +++ b/storage/maria/ha_maria.cc @@ -235,7 +235,7 @@ static MYSQL_SYSVAR_ULONG(pagecache_age_threshold, "until it is considered aged enough to be downgraded to a warm block. " "This specifies the percentage ratio of that number of hits to the " "total number of blocks in the page cache.", 0, 0, - 300, 100, ~0L, 100); + 300, 100, ~ (ulong) 0L, 100); static MYSQL_SYSVAR_ULONGLONG(pagecache_buffer_size, pagecache_buffer_size, PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY, diff --git a/storage/maria/ma_blockrec.c b/storage/maria/ma_blockrec.c index 02cb01b581c..8e0407c9d7a 100644 --- a/storage/maria/ma_blockrec.c +++ b/storage/maria/ma_blockrec.c @@ -4677,6 +4677,8 @@ int _ma_read_block_record2(MARIA_HA *info, uchar *record, MARIA_ROW *cur_row= &info->cur_row; DBUG_ENTER("_ma_read_block_record2"); + LINT_INIT(blob_buffer); + start_of_data= data; flag= (uint) (uchar) data[0]; cur_null_bytes= share->base.original_null_bytes; diff --git a/storage/maria/ma_ft_nlq_search.c b/storage/maria/ma_ft_nlq_search.c index e57cc135ca1..5c1ab85ef8a 100644 --- a/storage/maria/ma_ft_nlq_search.c +++ b/storage/maria/ma_ft_nlq_search.c @@ -83,6 +83,8 @@ static int walk_and_match(FT_WORD *word, uint32 count, ALL_IN_ONE *aio) #endif DBUG_ENTER("walk_and_match"); + LINT_INIT_STRUCT(subkeys); + word->weight=LWS_FOR_QUERY; _ma_ft_make_key(info, &key, aio->keynr, keybuff, word, 0); diff --git a/storage/maria/ma_key_recover.c b/storage/maria/ma_key_recover.c index 9ff2d954a60..502ac2b8809 100644 --- a/storage/maria/ma_key_recover.c +++ b/storage/maria/ma_key_recover.c @@ -945,7 +945,10 @@ uint _ma_apply_redo_index(MARIA_HA *info, const uchar *header_end= header + head_length; uint page_offset= 0, org_page_length; uint page_length, keypage_header, keynr; - uint max_page_size= share->max_index_block_size, new_page_length= 0; + uint max_page_size= share->max_index_block_size; +#ifndef DBUG_OFF + uint new_page_length= 0; +#endif int result; MARIA_PAGE page; DBUG_ENTER("_ma_apply_redo_index"); @@ -1107,7 +1110,9 @@ uint _ma_apply_redo_index(MARIA_HA *info, DBUG_PRINT("redo", ("org_page_length: %u new_page_length: %u", uint2korr(header), uint2korr(header+2))); DBUG_ASSERT(uint2korr(header) == page_length); +#ifndef DBUG_OFF new_page_length= min(uint2korr(header+2), max_page_size); +#endif header+= 4; break; case KEY_OP_MAX_PAGELENGTH: diff --git a/storage/maria/ma_pagecache.c b/storage/maria/ma_pagecache.c index 2618d6a5b50..6aaccea219f 100644 --- a/storage/maria/ma_pagecache.c +++ b/storage/maria/ma_pagecache.c @@ -3372,6 +3372,7 @@ restart: PAGECACHE_BLOCK_LINK *block; uint status; int page_st; + LINT_INIT(page_st); pagecache_pthread_mutex_lock(&pagecache->cache_lock); if (!pagecache->can_be_used) diff --git a/storage/maria/ma_search.c b/storage/maria/ma_search.c index 3b774fb4283..ccb4bf77717 100644 --- a/storage/maria/ma_search.c +++ b/storage/maria/ma_search.c @@ -439,6 +439,10 @@ int _ma_prefix_search(const MARIA_KEY *key, const MARIA_PAGE *ma_page, const uchar *sort_order= keyinfo->seg->charset->sort_order; DBUG_ENTER("_ma_prefix_search"); + LINT_INIT(seg_len_pack); + LINT_INIT(prefix_len); + LINT_INIT(length); + t_buff[0]=0; /* Avoid bugs */ page_flag= ma_page->flag; nod_flag= ma_page->node; diff --git a/storage/myisam/ft_nlq_search.c b/storage/myisam/ft_nlq_search.c index 5a9468fe007..bafa7064e28 100644 --- a/storage/myisam/ft_nlq_search.c +++ b/storage/myisam/ft_nlq_search.c @@ -81,6 +81,7 @@ static int walk_and_match(FT_WORD *word, uint32 count, ALL_IN_ONE *aio) #error #endif DBUG_ENTER("walk_and_match"); + LINT_INIT_STRUCT(subkeys); word->weight=LWS_FOR_QUERY; diff --git a/storage/xtradb/handler/ha_innodb.cc b/storage/xtradb/handler/ha_innodb.cc index 90f7b990d23..f9068772b0c 100644 --- a/storage/xtradb/handler/ha_innodb.cc +++ b/storage/xtradb/handler/ha_innodb.cc @@ -12387,7 +12387,7 @@ static MYSQL_SYSVAR_BOOL(doublewrite, innobase_use_doublewrite, static MYSQL_SYSVAR_ULONG(io_capacity, srv_io_capacity, PLUGIN_VAR_RQCMDARG, "Number of IOPs the server can do. Tunes the background IO rate", - NULL, NULL, 200, 100, ~0L, 0); + NULL, NULL, 200, 100, ~ (ulong) 0L, 0); static MYSQL_SYSVAR_ULONG(purge_batch_size, srv_purge_batch_size, PLUGIN_VAR_OPCMDARG, @@ -12520,7 +12520,7 @@ static MYSQL_SYSVAR_BOOL(adaptive_flushing, srv_adaptive_flushing, static MYSQL_SYSVAR_ULONG(max_purge_lag, srv_max_purge_lag, PLUGIN_VAR_RQCMDARG, "Desired maximum length of the purge queue (0 = no limit)", - NULL, NULL, 0, 0, ~0L, 0); + NULL, NULL, 0, 0, ~(ulong) 0L, 0); static MYSQL_SYSVAR_BOOL(rollback_on_timeout, innobase_rollback_on_timeout, PLUGIN_VAR_OPCMDARG | PLUGIN_VAR_READONLY, @@ -12624,7 +12624,7 @@ static MYSQL_SYSVAR_ULONG(commit_concurrency, innobase_commit_concurrency, static MYSQL_SYSVAR_ULONG(concurrency_tickets, srv_n_free_tickets_to_enter, PLUGIN_VAR_RQCMDARG, "Number of times a thread is allowed to enter InnoDB within the same SQL query after it has once got the ticket", - NULL, NULL, 500L, 1L, ~0L, 0); + NULL, NULL, 500L, 1L, ~(ulong) 0L, 0); #ifdef EXTENDED_FOR_KILLIDLE #define kill_idle_help_text "If non-zero value, the idle session with transaction which is idle over the value in seconds is killed by InnoDB." @@ -12694,12 +12694,12 @@ static MYSQL_SYSVAR_LONG(open_files, innobase_open_files, static MYSQL_SYSVAR_ULONG(sync_spin_loops, srv_n_spin_wait_rounds, PLUGIN_VAR_RQCMDARG, "Count of spin-loop rounds in InnoDB mutexes (30 by default)", - NULL, NULL, 30L, 0L, ~0L, 0); + NULL, NULL, 30L, 0L, ~ (ulong) 0L, 0); static MYSQL_SYSVAR_ULONG(spin_wait_delay, srv_spin_wait_delay, PLUGIN_VAR_OPCMDARG, "Maximum delay between polling for a spin lock (6 by default)", - NULL, NULL, 6L, 0L, ~0L, 0); + NULL, NULL, 6L, 0L, ~ (ulong) 0L, 0); static MYSQL_SYSVAR_BOOL(thread_concurrency_timer_based, innobase_thread_concurrency_timer_based, @@ -12715,7 +12715,7 @@ static MYSQL_SYSVAR_ULONG(thread_concurrency, srv_thread_concurrency, static MYSQL_SYSVAR_ULONG(thread_sleep_delay, srv_thread_sleep_delay, PLUGIN_VAR_RQCMDARG, "Time of innodb thread sleeping before joining InnoDB queue (usec). Value 0 disable a sleep", - NULL, NULL, 10000L, 0L, ~0L, 0); + NULL, NULL, 10000L, 0L, ~ (ulong) 0L, 0); static MYSQL_SYSVAR_STR(data_file_path, innobase_data_file_path, PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY, diff --git a/storage/xtradb/log/log0recv.c b/storage/xtradb/log/log0recv.c index c4429af5112..a554c576b6d 100644 --- a/storage/xtradb/log/log0recv.c +++ b/storage/xtradb/log/log0recv.c @@ -2980,7 +2980,7 @@ recv_recovery_from_checkpoint_start_func( ib_uint64_t checkpoint_lsn; ib_uint64_t checkpoint_no; ib_uint64_t old_scanned_lsn; - ib_uint64_t group_scanned_lsn; + ib_uint64_t group_scanned_lsn= 0; ib_uint64_t contiguous_lsn; #ifdef UNIV_LOG_ARCHIVE ib_uint64_t archived_lsn; diff --git a/strings/ctype-ucs2.c b/strings/ctype-ucs2.c index 83ea3739f4c..52eaece5528 100644 --- a/strings/ctype-ucs2.c +++ b/strings/ctype-ucs2.c @@ -2317,13 +2317,18 @@ void my_fill_utf32(CHARSET_INFO *cs, char *s, size_t slen, int fill) { char buf[10]; +#ifndef DBUG_OFF uint buflen; +#endif char *e= s + slen; DBUG_ASSERT((slen % 4) == 0); - buflen= cs->cset->wc_mb(cs, (my_wc_t) fill, (uchar*) buf, - (uchar*) buf + sizeof(buf)); +#ifndef DBUG_OFF + buflen= +#endif + cs->cset->wc_mb(cs, (my_wc_t) fill, (uchar*) buf, + (uchar*) buf + sizeof(buf)); DBUG_ASSERT(buflen == 4); while (s < e) { From fbee9f5b6e25e60c7e6785b3125a277426eb78b5 Mon Sep 17 00:00:00 2001 From: Igor Babaev Date: Tue, 14 Aug 2012 14:25:56 -0700 Subject: [PATCH 107/164] Corrected the pactch for mdev-449 to fix valgrind failures. --- sql/filesort.cc | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/sql/filesort.cc b/sql/filesort.cc index 4d06317447a..46348f91bb4 100644 --- a/sql/filesort.cc +++ b/sql/filesort.cc @@ -285,7 +285,8 @@ ha_rows filesort(THD *thd, TABLE *table, SORT_FIELD *sortorder, uint s_length, Use also the space previously used by string pointers in sort_buffer for temporary key storage. */ - param.keys= sort_buff_sz / param.rec_length; + param.keys=((param.keys*(param.rec_length+sizeof(char*))) / + param.rec_length-1); maxbuffer--; // Offset from 0 if (merge_many_buff(¶m,(uchar*) sort_keys,buffpek,&maxbuffer, &tempfile)) @@ -1260,8 +1261,7 @@ int merge_buffers(SORTPARAM *param, IO_CACHE *from_file, strpos= sort_buffer; org_max_rows=max_rows= param->max_rows; - /* The following will fire if there is not enough space in sort_buffer */ - DBUG_ASSERT(maxcount!=0); + set_if_bigger(maxcount, 1); if (unique_buff) { From dd8bd2e4c38a3e052b48ba8704e8a7aa89affd74 Mon Sep 17 00:00:00 2001 From: Michael Widenius Date: Wed, 15 Aug 2012 09:34:18 +0300 Subject: [PATCH 108/164] Fixed compiler warnings sql/item_subselect.cc: Added purecov info sql/sql_select.cc: Added cast storage/innobase/handler/ha_innodb.cc: Added cast storage/xtradb/btr/btr0btr.c: Added buf_block_get_frame_fast() to avoid compiler warning storage/xtradb/handler/ha_innodb.cc: Added cast storage/xtradb/include/buf0buf.h: Innodb has buf_block_get_frame(block) defined as (block)->frame. Didn't want to do a big change to break xtradb as it may use block_get_frame() differently, so I mad this quick hack to patch one compiler warning. --- configure.cmake | 4 ++-- sql/item_subselect.cc | 6 ++++++ sql/sql_select.cc | 2 +- storage/innobase/handler/ha_innodb.cc | 7 ++++--- storage/xtradb/btr/btr0btr.c | 2 +- storage/xtradb/handler/ha_innodb.cc | 7 ++++--- storage/xtradb/include/buf0buf.h | 2 ++ 7 files changed, 20 insertions(+), 10 deletions(-) diff --git a/configure.cmake b/configure.cmake index 1fb5fc920f6..05fa80e852f 100644 --- a/configure.cmake +++ b/configure.cmake @@ -56,10 +56,10 @@ ENDIF() # Always enable -Wall for gnu C/C++ IF(CMAKE_COMPILER_IS_GNUCXX) - SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wno-unused-parameter") + SET(CMAKE_CXX_FLAGS "-Wall ${CMAKE_CXX_FLAGS} -Wno-unused-parameter") ENDIF() IF(CMAKE_COMPILER_IS_GNUCC) - SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall") + SET(CMAKE_C_FLAGS "-Wall ${CMAKE_C_FLAGS}") ENDIF() diff --git a/sql/item_subselect.cc b/sql/item_subselect.cc index 8b9904ea260..cedc4ccb834 100644 --- a/sql/item_subselect.cc +++ b/sql/item_subselect.cc @@ -5169,13 +5169,17 @@ Ordered_key::cmp_keys_by_row_data(ha_rows a, ha_rows b) /* Fetch the rows for comparison. */ if ((error= tbl->file->ha_rnd_pos(tbl->record[0], rowid_a))) { + /* purecov: begin inspected */ tbl->file->print_error(error, MYF(ME_FATALERROR)); // Sets fatal_error return 0; + /* purecov: end */ } if ((error= tbl->file->ha_rnd_pos(tbl->record[1], rowid_b))) { + /* purecov: begin inspected */ tbl->file->print_error(error, MYF(ME_FATALERROR)); // Sets fatal_error return 0; + /* purecov: end */ } /* Compare the two rows by the corresponding values of the indexed @@ -5253,8 +5257,10 @@ int Ordered_key::cmp_key_with_search_key(rownum_t row_num) if ((error= tbl->file->ha_rnd_pos(tbl->record[0], cur_rowid))) { + /* purecov: begin inspected */ tbl->file->print_error(error, MYF(ME_FATALERROR)); // Sets fatal_error return 0; + /* purecov: end */ } for (uint i= 0; i < key_column_count; i++) diff --git a/sql/sql_select.cc b/sql/sql_select.cc index 165e257d42d..720b4e418d7 100644 --- a/sql/sql_select.cc +++ b/sql/sql_select.cc @@ -6657,7 +6657,7 @@ double JOIN::get_examined_rows() while ((tab= next_breadth_first_tab(this, tab))) { prev_fanout *= prev_tab->records_read; - examined_rows+= tab->get_examined_rows() * prev_fanout; + examined_rows+= (ha_rows) (tab->get_examined_rows() * prev_fanout); prev_tab= tab; } return examined_rows; diff --git a/storage/innobase/handler/ha_innodb.cc b/storage/innobase/handler/ha_innodb.cc index a39aef0794a..474c157fbc7 100644 --- a/storage/innobase/handler/ha_innodb.cc +++ b/storage/innobase/handler/ha_innodb.cc @@ -8418,9 +8418,10 @@ ha_innobase::info_low( } else if (rec_per_key > 1) { rec_per_key = - k_rec_per_key * - (double)rec_per_key / - n_rows; + (ha_rows) + (k_rec_per_key * + (double)rec_per_key / + n_rows); } key_info->rec_per_key[k++]= diff --git a/storage/xtradb/btr/btr0btr.c b/storage/xtradb/btr/btr0btr.c index 1fa6df44f7c..d4a0ef5ec60 100644 --- a/storage/xtradb/btr/btr0btr.c +++ b/storage/xtradb/btr/btr0btr.c @@ -61,7 +61,7 @@ btr_corruption_report( buf_block_get_zip_size(block), BUF_PAGE_PRINT_NO_CRASH); } - buf_page_print(buf_block_get_frame(block), 0, 0); + buf_page_print(buf_block_get_frame_fast(block), 0, 0); } #ifdef UNIV_BLOB_DEBUG diff --git a/storage/xtradb/handler/ha_innodb.cc b/storage/xtradb/handler/ha_innodb.cc index f9068772b0c..8aed19aad3e 100644 --- a/storage/xtradb/handler/ha_innodb.cc +++ b/storage/xtradb/handler/ha_innodb.cc @@ -9281,9 +9281,10 @@ ha_innobase::info_low( } else if (rec_per_key > 1) { rec_per_key = - k_rec_per_key * - (double)rec_per_key / - n_rows; + (ha_rows) + (k_rec_per_key * + (double)rec_per_key / + n_rows); } key_info->rec_per_key[k++]= diff --git a/storage/xtradb/include/buf0buf.h b/storage/xtradb/include/buf0buf.h index 7502942d681..5f8220de18d 100644 --- a/storage/xtradb/include/buf0buf.h +++ b/storage/xtradb/include/buf0buf.h @@ -1063,8 +1063,10 @@ buf_block_get_frame( /*================*/ const buf_block_t* block) /*!< in: pointer to the control block */ __attribute__((pure)); +# define buf_block_get_frame_fast(block) buf_block_get_frame(block) #else /* UNIV_DEBUG */ # define buf_block_get_frame(block) (block ? (block)->frame : 0) +# define buf_block_get_frame_fast(block) (block)->frame #endif /* UNIV_DEBUG */ /*********************************************************************//** Gets the space id of a block. From fbe5ac4e24ceaa9f75f52fba62f8c53e172e5c11 Mon Sep 17 00:00:00 2001 From: Michael Widenius Date: Wed, 15 Aug 2012 13:33:37 +0300 Subject: [PATCH 109/164] Fixed MDEV-365 "Got assertion when doing alter table on a partition" mysql-test/r/partition.result: Added test case mysql-test/t/partition.test: Added test case sql/sql_partition.cc: Do mysql_trans_prepare_alter_copy_data() after all original tables are locked. (We don't want to disable transactions for the original tables, that still may be in the cache) sql/sql_table.cc: Fixed two wrong DBUG_ENTER --- mysql-test/r/partition.result | 14 ++++++++++++++ mysql-test/t/partition.test | 10 ++++++++++ sql/sql_partition.cc | 6 ++++-- sql/sql_table.cc | 4 ++-- 4 files changed, 30 insertions(+), 4 deletions(-) diff --git a/mysql-test/r/partition.result b/mysql-test/r/partition.result index 431c5dda116..40586b8d54b 100644 --- a/mysql-test/r/partition.result +++ b/mysql-test/r/partition.result @@ -2473,3 +2473,17 @@ SELECT * FROM vtmp; 1 DROP VIEW vtmp; DROP TABLE t1; +# +# MDEV-365 "Got assertion when doing alter table on a partition" +# +CREATE TABLE t1 ( i INT ) ENGINE=Aria PARTITION BY HASH(i) PARTITIONS 2; +INSERT INTO t1 VALUES (1),(2),(2),(3),(4); +ALTER TABLE t1 ADD PARTITION PARTITIONS 2; +SELECT * from t1 order by i; +i +1 +2 +2 +3 +4 +DROP TABLE t1; diff --git a/mysql-test/t/partition.test b/mysql-test/t/partition.test index 08c028c8224..ef0d3df6661 100644 --- a/mysql-test/t/partition.test +++ b/mysql-test/t/partition.test @@ -2476,3 +2476,13 @@ SELECT 1 FROM t1 AS t1_0 JOIN t1 ON t1_0.a LIKE (SELECT 1 FROM t1); SELECT * FROM vtmp; DROP VIEW vtmp; DROP TABLE t1; + +--echo # +--echo # MDEV-365 "Got assertion when doing alter table on a partition" +--echo # + +CREATE TABLE t1 ( i INT ) ENGINE=Aria PARTITION BY HASH(i) PARTITIONS 2; +INSERT INTO t1 VALUES (1),(2),(2),(3),(4); +ALTER TABLE t1 ADD PARTITION PARTITIONS 2; +SELECT * from t1 order by i; +DROP TABLE t1; diff --git a/sql/sql_partition.cc b/sql/sql_partition.cc index a9c79589faa..2bec12e4f66 100644 --- a/sql/sql_partition.cc +++ b/sql/sql_partition.cc @@ -5500,10 +5500,12 @@ static bool mysql_change_partitions(ALTER_PARTITION_PARAM_TYPE *lpt) build_table_filename(path, sizeof(path) - 1, lpt->db, lpt->table_name, "", 0); - if(mysql_trans_prepare_alter_copy_data(thd)) + /* First lock the original tables */ + if (file->ha_external_lock(thd, F_WRLCK)) DBUG_RETURN(TRUE); - if (file->ha_external_lock(thd, F_WRLCK)) + /* Disable transactions for all new tables */ + if (mysql_trans_prepare_alter_copy_data(thd)) DBUG_RETURN(TRUE); /* TODO: test if bulk_insert would increase the performance */ diff --git a/sql/sql_table.cc b/sql/sql_table.cc index 2b1b43517b4..0a858b2c345 100644 --- a/sql/sql_table.cc +++ b/sql/sql_table.cc @@ -7247,7 +7247,7 @@ err_with_mdl: bool mysql_trans_prepare_alter_copy_data(THD *thd) { - DBUG_ENTER("mysql_prepare_alter_copy_data"); + DBUG_ENTER("mysql_trans_prepare_alter_copy_data"); /* Turn off recovery logging since rollback of an alter table is to delete the new table so there is no need to log the changes to it. @@ -7267,7 +7267,7 @@ bool mysql_trans_prepare_alter_copy_data(THD *thd) bool mysql_trans_commit_alter_copy_data(THD *thd) { bool error= FALSE; - DBUG_ENTER("mysql_commit_alter_copy_data"); + DBUG_ENTER("mysql_trans_commit_alter_copy_data"); if (ha_enable_transaction(thd, TRUE)) DBUG_RETURN(TRUE); From a1bc3936304ae9fca8cbe5ebeb51c8f626fbd87b Mon Sep 17 00:00:00 2001 From: Michael Widenius Date: Wed, 15 Aug 2012 14:37:55 +0300 Subject: [PATCH 110/164] Fixed MDEV-366: Assertion `share->reopen == 1' failed in maria_extra on DROP TABLE which is locked twice mysql-test/suite/maria/lock.result: Added test case mysql-test/suite/maria/lock.test: Added test case sql/sql_table.cc: One can't call HA_EXTRA_FORCE_REOPEN on something that may be opened twice. It's safe to remove the call in this case as we will call HA_EXTRA_PREPARE_FOR_DROP for the table anyway. (One nice side effect is that drop is a bit faster as we are not flushing the cache to disk before the drop anymore) --- mysql-test/suite/maria/lock.result | 3 +++ mysql-test/suite/maria/lock.test | 8 ++++++++ sql/sql_table.cc | 2 +- 3 files changed, 12 insertions(+), 1 deletion(-) diff --git a/mysql-test/suite/maria/lock.result b/mysql-test/suite/maria/lock.result index 101347c7d4c..b67d1ab7b0d 100644 --- a/mysql-test/suite/maria/lock.result +++ b/mysql-test/suite/maria/lock.result @@ -27,3 +27,6 @@ i drop table t2; unlock tables; drop table t1; +CREATE TABLE t1 (i INT) ENGINE=Aria; +LOCK TABLES t1 WRITE, t1 AS t1a WRITE; +DROP TABLE t1; diff --git a/mysql-test/suite/maria/lock.test b/mysql-test/suite/maria/lock.test index 6116f0b5f08..5b6d17069e7 100644 --- a/mysql-test/suite/maria/lock.test +++ b/mysql-test/suite/maria/lock.test @@ -42,3 +42,11 @@ select * from t1; drop table t2; unlock tables; drop table t1; + +# +# MDEV-366: lock table twice with LOCK TABLES and then drop it +# + +CREATE TABLE t1 (i INT) ENGINE=Aria; +LOCK TABLES t1 WRITE, t1 AS t1a WRITE; +DROP TABLE t1; diff --git a/sql/sql_table.cc b/sql/sql_table.cc index 0a858b2c345..db5435b9b27 100644 --- a/sql/sql_table.cc +++ b/sql/sql_table.cc @@ -2187,7 +2187,7 @@ int mysql_rm_table_no_locks(THD *thd, TABLE_LIST *tables, bool if_exists, if (thd->locked_tables_mode) { - if (wait_while_table_is_used(thd, table->table, HA_EXTRA_FORCE_REOPEN)) + if (wait_while_table_is_used(thd, table->table, HA_EXTRA_NOT_USED)) { error= -1; goto err; From 89036b9f8a0824ead608bf1ff8120f5f7101031e Mon Sep 17 00:00:00 2001 From: Michael Widenius Date: Fri, 17 Aug 2012 10:01:19 +0300 Subject: [PATCH 111/164] Fixed compiler warnings Fixed error in test that caused following tests to fail extra/yassl/taocrypt/src/dsa.cpp: Fixed compiler warning by adding cast mysql-test/suite/rpl/t/rpl_start_slave_deadlock_sys_vars.test: We have to first test for have_debug_sync to not start master wrongly plugin/auth_pam/auth_pam.c: Fixed compiler warning sql/sys_vars.h: Fixed compiler warning (Sys_var_max_user_conn is now signed) support-files/compiler_warnings.supp: Don't give warnings for auth_pam.c (Tried to fix it by changing the code, but could not find an easy way to do that on solaris) --- extra/yassl/taocrypt/src/dsa.cpp | 2 +- mysql-test/suite/rpl/t/rpl_start_slave_deadlock_sys_vars.test | 2 +- plugin/auth_pam/auth_pam.c | 2 +- sql/sys_vars.h | 2 +- support-files/compiler_warnings.supp | 1 + 5 files changed, 5 insertions(+), 4 deletions(-) diff --git a/extra/yassl/taocrypt/src/dsa.cpp b/extra/yassl/taocrypt/src/dsa.cpp index a4e9c9503e7..7b882b10cd1 100644 --- a/extra/yassl/taocrypt/src/dsa.cpp +++ b/extra/yassl/taocrypt/src/dsa.cpp @@ -184,7 +184,7 @@ word32 DSA_Signer::Sign(const byte* sha_digest, byte* sig, s_ = (kInv * (H + x*r_)) % q; if (!(!!r_ && !!s_)) - return -1; + return (word32) -1; int rSz = r_.ByteCount(); diff --git a/mysql-test/suite/rpl/t/rpl_start_slave_deadlock_sys_vars.test b/mysql-test/suite/rpl/t/rpl_start_slave_deadlock_sys_vars.test index dfcec6758b3..3eaff761108 100644 --- a/mysql-test/suite/rpl/t/rpl_start_slave_deadlock_sys_vars.test +++ b/mysql-test/suite/rpl/t/rpl_start_slave_deadlock_sys_vars.test @@ -1,5 +1,5 @@ -source include/master-slave.inc; source include/have_debug_sync.inc; +source include/master-slave.inc; --echo # connection: slave connection slave; diff --git a/plugin/auth_pam/auth_pam.c b/plugin/auth_pam/auth_pam.c index d8211294910..4f549142e72 100644 --- a/plugin/auth_pam/auth_pam.c +++ b/plugin/auth_pam/auth_pam.c @@ -107,7 +107,7 @@ static int conv(int n, const struct pam_message **msg, #define DO(X) if ((status = (X)) != PAM_SUCCESS) goto end -#ifdef SOLARIS +#if defined(SOLARIS) || defined(__sun) typedef void** pam_get_item_3_arg; #else typedef const void** pam_get_item_3_arg; diff --git a/sql/sys_vars.h b/sql/sys_vars.h index 5bec56a78cc..21bebcd762c 100644 --- a/sql/sys_vars.h +++ b/sql/sys_vars.h @@ -959,7 +959,7 @@ public: Sys_var_max_user_conn(const char *name_arg, const char *comment, int flag_args, ptrdiff_t off, size_t size, CMD_LINE getopt, - uint min_val, uint max_val, uint def_val, + int min_val, int max_val, int def_val, uint block_size, PolyLock *lock=0, enum binlog_status_enum binlog_status_arg=VARIABLE_NOT_IN_BINLOG, on_check_function on_check_func=0, diff --git a/support-files/compiler_warnings.supp b/support-files/compiler_warnings.supp index 1168770d624..0901b35d78c 100644 --- a/support-files/compiler_warnings.supp +++ b/support-files/compiler_warnings.supp @@ -163,6 +163,7 @@ mySTL/algorithm\.hpp: is used uninitialized in this function # .*/my_config\.h : _FILE_OFFSET_BITS /usr/include/sys/feature_tests.h : this is the location of the previous definition +*auth_pam\.c : initialization from incompatible pointer type : 100-200 # # Unexplanable (?) stuff From ee27b50ff8d8a80ca15cb33b4a8a0ed39aad772d Mon Sep 17 00:00:00 2001 From: unknown Date: Fri, 17 Aug 2012 14:35:28 +0200 Subject: [PATCH 112/164] Fix incorrect regexp in warning suppression pattern --- support-files/compiler_warnings.supp | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/support-files/compiler_warnings.supp b/support-files/compiler_warnings.supp index 0901b35d78c..dbad22a0a55 100644 --- a/support-files/compiler_warnings.supp +++ b/support-files/compiler_warnings.supp @@ -163,7 +163,7 @@ mySTL/algorithm\.hpp: is used uninitialized in this function # .*/my_config\.h : _FILE_OFFSET_BITS /usr/include/sys/feature_tests.h : this is the location of the previous definition -*auth_pam\.c : initialization from incompatible pointer type : 100-200 +.*auth_pam\.c : initialization from incompatible pointer type : 100-200 # # Unexplanable (?) stuff From 75e8ce6d7316900e3b9431e9d50889fe00d2928c Mon Sep 17 00:00:00 2001 From: Michael Widenius Date: Mon, 20 Aug 2012 22:54:15 +0300 Subject: [PATCH 113/164] Ensure we don't assert with debug binaries if SHOW INNODB STATUS returns with an error. sql/handler.cc: SHOW INNODB STATUS sometimes returns 0 even if it has generated an error. This code is here to catch it until InnoDB some day is fixed. storage/innobase/handler/ha_innodb.cc: Catch at least one of the possible errors from SHOW INNODB STATUS to provide a correct return code. storage/xtradb/handler/ha_innodb.cc: Catch at least one of the possible errors from SHOW INNODB STATUS to provide a correct return code. support-files/my-huge.cnf.sh: Fixed typo --- sql/handler.cc | 8 ++++++-- storage/innobase/handler/ha_innodb.cc | 8 +++++--- storage/xtradb/handler/ha_innodb.cc | 8 +++++--- support-files/my-huge.cnf.sh | 2 +- 4 files changed, 17 insertions(+), 9 deletions(-) diff --git a/sql/handler.cc b/sql/handler.cc index b5c9716bbbf..9ded738055e 100644 --- a/sql/handler.cc +++ b/sql/handler.cc @@ -4800,10 +4800,14 @@ bool ha_show_status(THD *thd, handlerton *db_type, enum ha_stat_type stat) db_type->show_status(db_type, thd, stat_print, stat) ? 1 : 0; } - if (!result) + /* + We also check thd->is_error() as Innodb may return 0 even if + there was an error. + */ + if (!result && !thd->is_error()) my_eof(thd); else if (!thd->is_error()) - my_error(ER_GET_ERRNO, MYF(0), 0); + my_error(ER_GET_ERRNO, MYF(0), errno); return result; } diff --git a/storage/innobase/handler/ha_innodb.cc b/storage/innobase/handler/ha_innodb.cc index 474c157fbc7..f0bc262327a 100644 --- a/storage/innobase/handler/ha_innodb.cc +++ b/storage/innobase/handler/ha_innodb.cc @@ -9576,6 +9576,7 @@ innodb_show_status( const long MAX_STATUS_SIZE = 1048576; ulint trx_list_start = ULINT_UNDEFINED; ulint trx_list_end = ULINT_UNDEFINED; + bool res; DBUG_ENTER("innodb_show_status"); DBUG_ASSERT(hton == innodb_hton_ptr); @@ -9639,12 +9640,13 @@ innodb_show_status( mutex_exit(&srv_monitor_file_mutex); - stat_print(thd, innobase_hton_name, (uint) strlen(innobase_hton_name), - STRING_WITH_LEN(""), str, flen); + res= stat_print(thd, innobase_hton_name, + (uint) strlen(innobase_hton_name), + STRING_WITH_LEN(""), str, flen); my_free(str); - DBUG_RETURN(FALSE); + DBUG_RETURN(res); } /************************************************************************//** diff --git a/storage/xtradb/handler/ha_innodb.cc b/storage/xtradb/handler/ha_innodb.cc index 8aed19aad3e..8b6cc1912c5 100644 --- a/storage/xtradb/handler/ha_innodb.cc +++ b/storage/xtradb/handler/ha_innodb.cc @@ -10475,6 +10475,7 @@ innodb_show_status( const long MAX_STATUS_SIZE = 1048576; ulint trx_list_start = ULINT_UNDEFINED; ulint trx_list_end = ULINT_UNDEFINED; + bool res; DBUG_ENTER("innodb_show_status"); DBUG_ASSERT(hton == innodb_hton_ptr); @@ -10538,12 +10539,13 @@ innodb_show_status( mutex_exit(&srv_monitor_file_mutex); - stat_print(thd, innobase_hton_name, (uint) strlen(innobase_hton_name), - STRING_WITH_LEN(""), str, flen); + res= stat_print(thd, innobase_hton_name, + (uint) strlen(innobase_hton_name), + STRING_WITH_LEN(""), str, flen); my_free(str); - DBUG_RETURN(FALSE); + DBUG_RETURN(res); } /************************************************************************//** diff --git a/support-files/my-huge.cnf.sh b/support-files/my-huge.cnf.sh index 896b139273b..4e083488285 100644 --- a/support-files/my-huge.cnf.sh +++ b/support-files/my-huge.cnf.sh @@ -121,7 +121,7 @@ server-id = 1 # Uncomment the following if you are using InnoDB tables #innodb_data_home_dir = @localstatedir@ #innodb_data_file_path = ibdata1:2000M;ibdata2:10M:autoextend -o#innodb_log_group_home_dir = @localstatedir@ +#innodb_log_group_home_dir = @localstatedir@ # You can set .._buffer_pool_size up to 50 - 80 % # of RAM but beware of setting memory usage too high #innodb_buffer_pool_size = 384M From a45c451e4002875187a40ec17e872d3b69a3452a Mon Sep 17 00:00:00 2001 From: Michael Widenius Date: Tue, 21 Aug 2012 08:46:32 +0300 Subject: [PATCH 114/164] Fix for bug lp:1039277 "Crash in sql_cache.cc". The crash happend when combining query cache, prepared statements and using a read only cursor. sql/sql_cache.cc: Fixed unlikely error when one adjust query cache size in middle of operation sql/sql_cursor.cc: Disable query cache when using cursors. This fixed lp:1039277 tests/mysql_client_test.c: Test case for lp:1039277 --- sql/sql_cache.cc | 3 +++ sql/sql_cursor.cc | 2 ++ tests/mysql_client_test.c | 47 +++++++++++++++++++++++++++++++++++++++ 3 files changed, 52 insertions(+) diff --git a/sql/sql_cache.cc b/sql/sql_cache.cc index 7edd28446a2..191cc4e01c8 100644 --- a/sql/sql_cache.cc +++ b/sql/sql_cache.cc @@ -1813,7 +1813,10 @@ Query_cache::send_result_to_client(THD *thd, char *org_sql, uint query_length) goto err; if (query_cache_size == 0) + { + thd->query_cache_is_applicable= 0; // Query can't be cached goto err_unlock; + } Query_cache_block *query_block; if (thd->variables.query_cache_strip_comments) diff --git a/sql/sql_cursor.cc b/sql/sql_cursor.cc index c50cded7470..b8b979a282b 100644 --- a/sql/sql_cursor.cc +++ b/sql/sql_cursor.cc @@ -115,6 +115,8 @@ int mysql_open_cursor(THD *thd, select_result *result, &thd->security_ctx->priv_user[0], (char *) thd->security_ctx->host_or_ip, 2); + /* Mark that we can't use query cache with cursors */ + thd->query_cache_is_applicable= 0; rc= mysql_execute_command(thd); MYSQL_QUERY_EXEC_DONE(rc); diff --git a/tests/mysql_client_test.c b/tests/mysql_client_test.c index 9c2329e609a..a0b18f1f717 100644 --- a/tests/mysql_client_test.c +++ b/tests/mysql_client_test.c @@ -357,6 +357,7 @@ static void test_prepare_insert_update() myquery(rc); } + /* Test simple prepares of all DML statements */ static void test_prepare_simple() @@ -2308,6 +2309,7 @@ static void test_ps_query_cache() if (!opt_silent) fprintf(stdout, "OK"); + break; } strmov(query, "select id1, value1 from t1 where id1= ? or " @@ -13024,6 +13026,49 @@ static void test_bug8880() mysql_stmt_close(*stmt); } +/* + Test executing a query with prepared statements while query cache is active +*/ + +static void test_open_cursor_prepared_statement_query_cache() +{ + MYSQL_STMT *stmt; + int rc; + MYSQL_RES *result; + + myheader("test_open_cursor_prepared_statement_query_cache"); + if (! is_query_cache_available()) + { + fprintf(stdout, "Skipping test_open_cursor_prepared_statement_query_cache: Query cache not available.\n"); + return; + } + + rc= mysql_query(mysql, "set global query_cache_size=1000000"); + myquery(rc); + + mysql_query(mysql, "drop table if exists t1"); + mysql_query(mysql, "create table t1 (a int not null primary key, b int)"); + rc= mysql_query(mysql, "insert into t1 values (1,1)"); + myquery(rc); /* one check is enough */ + + /* Store query in query cache */ + rc= mysql_query(mysql, "SELECT * FROM t1"); + myquery(rc); + result= mysql_store_result(mysql); + mytest(result); + (void) my_process_result_set(result); + mysql_free_result(result); + + /* Test using a cursor */ + stmt= open_cursor("select a from t1"); + rc= mysql_stmt_execute(stmt); + check_execute(stmt, rc); + mysql_stmt_close(stmt); + + rc= mysql_query(mysql, "set global query_cache_size=1000000"); + myquery(rc); +} + static void test_bug9159() { @@ -18917,6 +18962,8 @@ static struct my_tests_st my_tests[]= { { "test_bug8378", test_bug8378 }, { "test_bug8722", test_bug8722 }, { "test_bug8880", test_bug8880 }, + { "test_open_cursor_prepared_statement_query_cache", + test_open_cursor_prepared_statement_query_cache }, { "test_bug9159", test_bug9159 }, { "test_bug9520", test_bug9520 }, { "test_bug9478", test_bug9478 }, From 80b3f7470536503ffe1103dda3dea3f29b7c9641 Mon Sep 17 00:00:00 2001 From: unknown Date: Tue, 21 Aug 2012 15:24:43 +0300 Subject: [PATCH 115/164] Fix bug mdev-447: Wrong output from the EXPLAIN command of the test case for lp bug #714999 The fix backports from MWL#182: Explain running statements the logic that saves the original JOIN_TAB array of a query plan after optimization. This array is later used during EXPLAIN to iterate over the original JOIN plan nodes in the cases when this plan could be changed by early subquery execution during the optimization phase of the outer query. --- mysql-test/r/subselect.result | 2 +- mysql-test/r/subselect_innodb.result | 4 +- mysql-test/r/subselect_mat_cost_bugs.result | 2 +- mysql-test/r/subselect_no_mat.result | 2 +- mysql-test/r/subselect_no_opts.result | 2 +- mysql-test/r/subselect_no_scache.result | 2 +- mysql-test/r/subselect_no_semijoin.result | 2 +- sql/sql_select.cc | 54 ++++++++++++--------- sql/sql_select.h | 13 +++++ 9 files changed, 52 insertions(+), 31 deletions(-) diff --git a/mysql-test/r/subselect.result b/mysql-test/r/subselect.result index 3ea6c0be398..8c71c09c1ac 100644 --- a/mysql-test/r/subselect.result +++ b/mysql-test/r/subselect.result @@ -4196,7 +4196,7 @@ INSERT INTO t1 VALUES (1,1),(2,1); EXPLAIN SELECT 1 FROM t1 WHERE a = (SELECT COUNT(*) FROM t1 GROUP BY b); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ref a a 5 const 1 Using where; Using index -2 SUBQUERY internal_tmp_table ALL group_key NULL NULL NULL 1 Using temporary; Using filesort +2 SUBQUERY t1 ALL NULL NULL NULL NULL 2 Using temporary; Using filesort DROP TABLE t1; CREATE TABLE t1 (id int NOT NULL, st CHAR(2), INDEX idx(id)); INSERT INTO t1 VALUES diff --git a/mysql-test/r/subselect_innodb.result b/mysql-test/r/subselect_innodb.result index a0f05a26a46..a4670872fad 100644 --- a/mysql-test/r/subselect_innodb.result +++ b/mysql-test/r/subselect_innodb.result @@ -333,7 +333,7 @@ WHERE (SELECT DISTINCT b FROM t3) > 0); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 const PRIMARY PRIMARY 4 const 1 Using where; Using index 2 SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE -3 SUBQUERY internal_tmp_table ALL group_key NULL NULL NULL 0 Using temporary +3 SUBQUERY t3 ALL NULL NULL NULL NULL 1 Using temporary SELECT * FROM t1 WHERE t1.a = ( @@ -386,7 +386,7 @@ select 1 from t1 where 1 like (select 1 from t1 where 1 <=> (select 1 from t1 gr id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 1 2 SUBQUERY t1 ALL NULL NULL NULL NULL 1 -3 SUBQUERY internal_tmp_table ALL group_key NULL NULL NULL 1 Using temporary; Using filesort +3 SUBQUERY t1 ALL NULL NULL NULL NULL 1 Using temporary; Using filesort select 1 from t1 where 1 like (select 1 from t1 where 1 <=> (select 1 from t1 group by a1)); 1 1 diff --git a/mysql-test/r/subselect_mat_cost_bugs.result b/mysql-test/r/subselect_mat_cost_bugs.result index 1d03f2e9fe6..8c95c8637aa 100644 --- a/mysql-test/r/subselect_mat_cost_bugs.result +++ b/mysql-test/r/subselect_mat_cost_bugs.result @@ -148,7 +148,7 @@ FROM t2 GROUP BY f1 id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables 2 SUBQUERY t1 system NULL NULL NULL NULL 1 -3 SUBQUERY internal_tmp_table ALL group_key NULL NULL NULL 1 Using temporary; Using filesort +3 SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using temporary; Using filesort drop table t1, t2, t3; # # LP BUG#715034 Item_sum_distinct::clear(): Assertion `tree != 0' failed diff --git a/mysql-test/r/subselect_no_mat.result b/mysql-test/r/subselect_no_mat.result index 8ce097787f1..48ab96dcaaa 100644 --- a/mysql-test/r/subselect_no_mat.result +++ b/mysql-test/r/subselect_no_mat.result @@ -4200,7 +4200,7 @@ INSERT INTO t1 VALUES (1,1),(2,1); EXPLAIN SELECT 1 FROM t1 WHERE a = (SELECT COUNT(*) FROM t1 GROUP BY b); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ref a a 5 const 1 Using where; Using index -2 SUBQUERY internal_tmp_table ALL group_key NULL NULL NULL 1 Using temporary; Using filesort +2 SUBQUERY t1 ALL NULL NULL NULL NULL 2 Using temporary; Using filesort DROP TABLE t1; CREATE TABLE t1 (id int NOT NULL, st CHAR(2), INDEX idx(id)); INSERT INTO t1 VALUES diff --git a/mysql-test/r/subselect_no_opts.result b/mysql-test/r/subselect_no_opts.result index 466d8c8fd06..9ab4e23b091 100644 --- a/mysql-test/r/subselect_no_opts.result +++ b/mysql-test/r/subselect_no_opts.result @@ -4196,7 +4196,7 @@ INSERT INTO t1 VALUES (1,1),(2,1); EXPLAIN SELECT 1 FROM t1 WHERE a = (SELECT COUNT(*) FROM t1 GROUP BY b); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ref a a 5 const 1 Using where; Using index -2 SUBQUERY internal_tmp_table ALL group_key NULL NULL NULL 1 Using temporary; Using filesort +2 SUBQUERY t1 ALL NULL NULL NULL NULL 2 Using temporary; Using filesort DROP TABLE t1; CREATE TABLE t1 (id int NOT NULL, st CHAR(2), INDEX idx(id)); INSERT INTO t1 VALUES diff --git a/mysql-test/r/subselect_no_scache.result b/mysql-test/r/subselect_no_scache.result index 1fde0d08d7e..d47aa956ead 100644 --- a/mysql-test/r/subselect_no_scache.result +++ b/mysql-test/r/subselect_no_scache.result @@ -4202,7 +4202,7 @@ INSERT INTO t1 VALUES (1,1),(2,1); EXPLAIN SELECT 1 FROM t1 WHERE a = (SELECT COUNT(*) FROM t1 GROUP BY b); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ref a a 5 const 1 Using where; Using index -2 SUBQUERY internal_tmp_table ALL group_key NULL NULL NULL 1 Using temporary; Using filesort +2 SUBQUERY t1 ALL NULL NULL NULL NULL 2 Using temporary; Using filesort DROP TABLE t1; CREATE TABLE t1 (id int NOT NULL, st CHAR(2), INDEX idx(id)); INSERT INTO t1 VALUES diff --git a/mysql-test/r/subselect_no_semijoin.result b/mysql-test/r/subselect_no_semijoin.result index ba50b8522eb..96e6c2182fa 100644 --- a/mysql-test/r/subselect_no_semijoin.result +++ b/mysql-test/r/subselect_no_semijoin.result @@ -4196,7 +4196,7 @@ INSERT INTO t1 VALUES (1,1),(2,1); EXPLAIN SELECT 1 FROM t1 WHERE a = (SELECT COUNT(*) FROM t1 GROUP BY b); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ref a a 5 const 1 Using where; Using index -2 SUBQUERY internal_tmp_table ALL group_key NULL NULL NULL 1 Using temporary; Using filesort +2 SUBQUERY t1 ALL NULL NULL NULL NULL 2 Using temporary; Using filesort DROP TABLE t1; CREATE TABLE t1 (id int NOT NULL, st CHAR(2), INDEX idx(id)); INSERT INTO t1 VALUES diff --git a/sql/sql_select.cc b/sql/sql_select.cc index 720b4e418d7..dc09488632c 100644 --- a/sql/sql_select.cc +++ b/sql/sql_select.cc @@ -271,8 +271,11 @@ Item_equal *find_item_equal(COND_EQUAL *cond_equal, Field *field, bool *inherited_fl); JOIN_TAB *first_depth_first_tab(JOIN* join); JOIN_TAB *next_depth_first_tab(JOIN* join, JOIN_TAB* tab); -JOIN_TAB *first_breadth_first_tab(JOIN *join); -JOIN_TAB *next_breadth_first_tab(JOIN *join, JOIN_TAB *tab); + +enum enum_exec_or_opt {WALK_OPTIMIZATION_TABS , WALK_EXECUTION_TABS}; +JOIN_TAB *first_breadth_first_tab(JOIN *join, enum enum_exec_or_opt tabs_kind); +JOIN_TAB *next_breadth_first_tab(JOIN *join, enum enum_exec_or_opt tabs_kind, + JOIN_TAB *tab); /** This handles SELECT with and without UNION. @@ -6649,12 +6652,12 @@ double JOIN::get_examined_rows() { ha_rows examined_rows; double prev_fanout= 1; - JOIN_TAB *tab= first_breadth_first_tab(this); + JOIN_TAB *tab= first_breadth_first_tab(this, WALK_OPTIMIZATION_TABS); JOIN_TAB *prev_tab= tab; examined_rows= tab->get_examined_rows(); - while ((tab= next_breadth_first_tab(this, tab))) + while ((tab= next_breadth_first_tab(this, WALK_OPTIMIZATION_TABS, tab))) { prev_fanout *= prev_tab->records_read; examined_rows+= (ha_rows) (tab->get_examined_rows() * prev_fanout); @@ -7269,23 +7272,30 @@ prev_record_reads(POSITION *positions, uint idx, table_map found_ref) Enumerate join tabs in breadth-first fashion, including const tables. */ -JOIN_TAB *first_breadth_first_tab(JOIN *join) +JOIN_TAB *first_breadth_first_tab(JOIN *join, enum enum_exec_or_opt tabs_kind) { - return join->join_tab; /* There's always one (i.e. first) table */ + /* There's always one (i.e. first) table */ + return (tabs_kind == WALK_EXECUTION_TABS)? join->join_tab: + join->table_access_tabs; } -JOIN_TAB *next_breadth_first_tab(JOIN *join, JOIN_TAB *tab) +JOIN_TAB *next_breadth_first_tab(JOIN *join, enum enum_exec_or_opt tabs_kind, + JOIN_TAB *tab) { + JOIN_TAB* const first_top_tab= first_breadth_first_tab(join, tabs_kind); + const uint n_top_tabs_count= (tabs_kind == WALK_EXECUTION_TABS)? + join->top_join_tab_count: + join->top_table_access_tabs_count; if (!tab->bush_root_tab) { /* We're at top level. Get the next top-level tab */ tab++; - if (tab < join->join_tab + join->top_join_tab_count) + if (tab < first_top_tab + n_top_tabs_count) return tab; /* No more top-level tabs. Switch to enumerating SJM nest children */ - tab= join->join_tab; + tab= first_top_tab; } else { @@ -7309,7 +7319,7 @@ JOIN_TAB *next_breadth_first_tab(JOIN *join, JOIN_TAB *tab) Ok, "tab" points to a top-level table, and we need to find the next SJM nest and enter it. */ - for (; tab < join->join_tab + join->top_join_tab_count; tab++) + for (; tab < first_top_tab + n_top_tabs_count; tab++) { if (tab->bush_children) return tab->bush_children->start; @@ -7333,7 +7343,7 @@ JOIN_TAB *first_top_level_tab(JOIN *join, enum enum_with_const_tables with_const JOIN_TAB *next_top_level_tab(JOIN *join, JOIN_TAB *tab) { - tab= next_breadth_first_tab(join, tab); + tab= next_breadth_first_tab(join, WALK_EXECUTION_TABS, tab); if (tab && tab->bush_root_tab) tab= NULL; return tab; @@ -7633,6 +7643,12 @@ get_best_combination(JOIN *join) join->top_join_tab_count= join->join_tab_ranges.head()->end - join->join_tab_ranges.head()->start; + /* + Save pointers to select join tabs for SHOW EXPLAIN + */ + join->table_access_tabs= join->join_tab; + join->top_table_access_tabs_count= join->top_join_tab_count; + update_depend_map(join); DBUG_RETURN(0); } @@ -21389,8 +21405,8 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order, bool printing_materialize_nest= FALSE; uint select_id= join->select_lex->select_number; - for (JOIN_TAB *tab= first_breadth_first_tab(join); tab; - tab= next_breadth_first_tab(join, tab)) + for (JOIN_TAB *tab= first_breadth_first_tab(join, WALK_OPTIMIZATION_TABS); tab; + tab= next_breadth_first_tab(join, WALK_OPTIMIZATION_TABS, tab)) { if (tab->bush_root_tab) { @@ -21473,16 +21489,8 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order, else { TABLE_LIST *real_table= table->pos_in_table_list; - /* - Internal temporary tables have no corresponding table reference - object. Such a table may appear in EXPLAIN when a subquery that needs - a temporary table has been executed, and JOIN::exec replaced the - original JOIN with a plan to access the data in the temp table - (made by JOIN::make_simple_join). - */ - const char *tab_name= real_table ? real_table->alias : - "internal_tmp_table"; - item_list.push_back(new Item_string(tab_name, strlen(tab_name), cs)); + item_list.push_back(new Item_string(real_table->alias, + strlen(real_table->alias), cs)); } /* "partitions" column */ if (join->thd->lex->describe & DESCRIBE_PARTITIONS) diff --git a/sql/sql_select.h b/sql/sql_select.h index 0ed976ac36a..be5f523a7e2 100644 --- a/sql/sql_select.h +++ b/sql/sql_select.h @@ -897,6 +897,19 @@ protected: public: JOIN_TAB *join_tab, **best_ref; + + /* + For "Using temporary+Using filesort" queries, JOIN::join_tab can point to + either: + 1. array of join tabs describing how to run the select, or + 2. array of single join tab describing read from the temporary table. + + SHOW EXPLAIN code needs to read/show #1. This is why two next members are + there for saving it. + */ + JOIN_TAB *table_access_tabs; + uint top_table_access_tabs_count; + JOIN_TAB **map2table; ///< mapping between table indexes and JOIN_TABs JOIN_TAB *join_tab_save; ///< saved join_tab for subquery reexecution From ed06ba3492d55c9e9dde231b55352f854e5e4b50 Mon Sep 17 00:00:00 2001 From: Sergey Petrunya Date: Tue, 21 Aug 2012 22:24:34 +0400 Subject: [PATCH 116/164] Better comments --- sql/opt_subselect.cc | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/sql/opt_subselect.cc b/sql/opt_subselect.cc index 0273c947ef6..4591888307e 100644 --- a/sql/opt_subselect.cc +++ b/sql/opt_subselect.cc @@ -143,18 +143,18 @@ 3.2.1 Non-merged semi-joins and join optimization ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ For join optimization purposes, non-merged semi-join nests are similar to - base tables - they've got one JOIN_TAB, which can be accessed with one of - two methods: + base tables. Each such nest is represented by one one JOIN_TAB, which has + two possible access strategies: - full table scan (representing SJ-Materialization-Scan strategy) - eq_ref-like table lookup (representing SJ-Materialization-Lookup) Unlike regular base tables, non-merged semi-joins have: - non-zero JOIN_TAB::startup_cost, and - join_tab->table->is_filled_at_execution()==TRUE, which means one - cannot do const table detection or range analysis or other table data- - dependent inferences - // instead, get_delayed_table_estimates() runs optimization on the nest so that - // we get an idea about temptable size + cannot do const table detection, range analysis or other dataset-dependent + optimizations. + Instead, get_delayed_table_estimates() will run optimization for the + subquery and produce an E(materialized table size). 3.2.2 Merged semi-joins and join optimization ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ From 651ac12e8821a994e6176e63eef3e87b70f9746c Mon Sep 17 00:00:00 2001 From: Sergei Golubchik Date: Wed, 22 Aug 2012 08:42:24 +0200 Subject: [PATCH 117/164] XtraDB 1.1.8-27.0 from Percona-Server-5.5.25a-rel27.1 --- btr/btr0cur.c | 2 ++ buf/buf0flu.c | 9 --------- dict/dict0load.c | 4 ++-- fil/fil0fil.c | 7 +++++-- handler/ha_innodb.cc | 25 +++++++++++++++++++++++-- handler/ha_innodb.h | 1 + handler/i_s.cc | 22 ++++++++++++++++++++++ include/srv0srv.h | 1 + include/univ.i | 2 +- srv/srv0start.c | 16 ++++++++++++---- sync/sync0arr.c | 5 +++++ 11 files changed, 74 insertions(+), 20 deletions(-) diff --git a/btr/btr0cur.c b/btr/btr0cur.c index e093dabebf1..26db7329b7e 100644 --- a/btr/btr0cur.c +++ b/btr/btr0cur.c @@ -3604,6 +3604,8 @@ btr_estimate_n_rows_in_range( n_rows = n_rows * 2; } + DBUG_EXECUTE_IF("bug14007649", return(n_rows);); + /* Do not estimate the number of rows in the range to over 1 / 2 of the estimated rows in the whole table */ diff --git a/buf/buf0flu.c b/buf/buf0flu.c index bb921928653..39351cd3678 100644 --- a/buf/buf0flu.c +++ b/buf/buf0flu.c @@ -1846,8 +1846,6 @@ buf_flush_batch( } #endif /* UNIV_DEBUG */ - srv_buf_pool_flushed += count; - return(count); } @@ -1874,13 +1872,6 @@ buf_flush_common( #endif /* UNIV_DEBUG */ srv_buf_pool_flushed += page_count; - - if (flush_type == BUF_FLUSH_LRU) { - /* We keep track of all flushes happening as part of LRU - flush. When estimating the desired rate at which flush_list - should be flushed we factor in this value. */ - buf_lru_flush_page_count += page_count; - } } /******************************************************************//** diff --git a/dict/dict0load.c b/dict/dict0load.c index 6029e6f0070..7ee120c19c8 100644 --- a/dict/dict0load.c +++ b/dict/dict0load.c @@ -179,7 +179,7 @@ dict_print(void) monitor printout */ mutex_enter(&kernel_mutex); - srv_fatal_semaphore_wait_threshold += 7200; /* 2 hours */ + srv_fatal_semaphore_wait_threshold += SRV_SEMAPHORE_WAIT_EXTENSION; mutex_exit(&kernel_mutex); heap = mem_heap_create(1000); @@ -216,7 +216,7 @@ dict_print(void) /* Restore the fatal semaphore wait timeout */ mutex_enter(&kernel_mutex); - srv_fatal_semaphore_wait_threshold -= 7200; /* 2 hours */ + srv_fatal_semaphore_wait_threshold -= SRV_SEMAPHORE_WAIT_EXTENSION; mutex_exit(&kernel_mutex); } diff --git a/fil/fil0fil.c b/fil/fil0fil.c index 66cbdf51140..32e78cf19b4 100644 --- a/fil/fil0fil.c +++ b/fil/fil0fil.c @@ -1932,7 +1932,7 @@ fil_inc_pending_ops( if (space == NULL) { fprintf(stderr, - "InnoDB: Error: trying to do ibuf merge to a" + "InnoDB: Error: trying to do an operation on a" " dropped tablespace %lu\n", (ulong) id); } @@ -3440,6 +3440,7 @@ skip_info: for (offset = 0; offset < free_limit_bytes; offset += zip_size ? zip_size : UNIV_PAGE_SIZE) { ibool page_is_corrupt; + ibool is_descr_page = FALSE; success = os_file_read(file, page, (ulint)(offset & 0xFFFFFFFFUL), @@ -3478,6 +3479,7 @@ skip_info: /* store as descr page */ memcpy(descr_page, page, (zip_size ? zip_size : UNIV_PAGE_SIZE)); + is_descr_page = TRUE; } else if (descr_is_corrupt) { /* unknown state of the page */ @@ -3554,7 +3556,8 @@ skip_info: } } - if (fil_page_get_type(page) == FIL_PAGE_INDEX) { + if (fil_page_get_type(page) == + FIL_PAGE_INDEX && !is_descr_page) { index_id_t tmp = mach_read_from_8(page + (PAGE_HEADER + PAGE_INDEX_ID)); for (i = 0; i < n_index; i++) { diff --git a/handler/ha_innodb.cc b/handler/ha_innodb.cc index 0d08cd2c1b6..a1a60aa2276 100644 --- a/handler/ha_innodb.cc +++ b/handler/ha_innodb.cc @@ -4807,6 +4807,27 @@ table_opened: DBUG_RETURN(0); } +UNIV_INTERN +handler* +ha_innobase::clone( +/*===============*/ + const char* name, /*!< in: table name */ + MEM_ROOT* mem_root) /*!< in: memory context */ +{ + ha_innobase* new_handler; + + DBUG_ENTER("ha_innobase::clone"); + + new_handler = static_cast(handler::clone(name, + mem_root)); + if (new_handler) { + new_handler->prebuilt->select_lock_type + = prebuilt->select_lock_type; + } + + DBUG_RETURN(new_handler); +} + UNIV_INTERN uint ha_innobase::max_supported_key_part_length() const @@ -9284,7 +9305,7 @@ ha_innobase::check( /* Enlarge the fatal lock wait timeout during CHECK TABLE. */ mutex_enter(&kernel_mutex); - srv_fatal_semaphore_wait_threshold += 7200; /* 2 hours */ + srv_fatal_semaphore_wait_threshold += SRV_SEMAPHORE_WAIT_EXTENSION; mutex_exit(&kernel_mutex); for (index = dict_table_get_first_index(prebuilt->table); @@ -9425,7 +9446,7 @@ ha_innobase::check( /* Restore the fatal lock wait timeout after CHECK TABLE. */ mutex_enter(&kernel_mutex); - srv_fatal_semaphore_wait_threshold -= 7200; /* 2 hours */ + srv_fatal_semaphore_wait_threshold -= SRV_SEMAPHORE_WAIT_EXTENSION; mutex_exit(&kernel_mutex); prebuilt->trx->op_info = ""; diff --git a/handler/ha_innodb.h b/handler/ha_innodb.h index 39ef3631138..abaafcf7978 100644 --- a/handler/ha_innodb.h +++ b/handler/ha_innodb.h @@ -134,6 +134,7 @@ class ha_innobase: public handler const key_map* keys_to_use_for_scanning(); int open(const char *name, int mode, uint test_if_locked); + handler* clone(const char *name, MEM_ROOT *mem_root); int close(void); double scan_time(); double read_time(uint index, uint ranges, ha_rows rows); diff --git a/handler/i_s.cc b/handler/i_s.cc index a2497518da3..a7b453846f7 100644 --- a/handler/i_s.cc +++ b/handler/i_s.cc @@ -1941,6 +1941,8 @@ i_s_sys_tables_fill_table( DBUG_ENTER("i_s_sys_tables_fill_table"); + RETURN_IF_INNODB_NOT_STARTED(tables->schema_table_name); + /* deny access to non-superusers */ if (check_global_access(thd, PROCESS_ACL)) { @@ -2248,6 +2250,8 @@ i_s_sys_tables_fill_table_stats( DBUG_ENTER("i_s_sys_tables_fill_table_stats"); + RETURN_IF_INNODB_NOT_STARTED(tables->schema_table_name); + /* deny access to non-superusers */ if (check_global_access(thd, PROCESS_ACL)) { @@ -2496,6 +2500,8 @@ i_s_sys_indexes_fill_table( DBUG_ENTER("i_s_sys_indexes_fill_table"); + RETURN_IF_INNODB_NOT_STARTED(tables->schema_table_name); + /* deny access to non-superusers */ if (check_global_access(thd, PROCESS_ACL)) { @@ -2737,6 +2743,8 @@ i_s_sys_columns_fill_table( DBUG_ENTER("i_s_sys_columns_fill_table"); + RETURN_IF_INNODB_NOT_STARTED(tables->schema_table_name); + /* deny access to non-superusers */ if (check_global_access(thd, PROCESS_ACL)) { @@ -2943,6 +2951,8 @@ i_s_sys_fields_fill_table( DBUG_ENTER("i_s_sys_fields_fill_table"); + RETURN_IF_INNODB_NOT_STARTED(tables->schema_table_name); + /* deny access to non-superusers */ if (check_global_access(thd, PROCESS_ACL)) { @@ -3176,6 +3186,8 @@ i_s_sys_foreign_fill_table( DBUG_ENTER("i_s_sys_foreign_fill_table"); + RETURN_IF_INNODB_NOT_STARTED(tables->schema_table_name); + /* deny access to non-superusers */ if (check_global_access(thd, PROCESS_ACL)) { @@ -3391,6 +3403,8 @@ i_s_sys_foreign_cols_fill_table( DBUG_ENTER("i_s_sys_foreign_cols_fill_table"); + RETURN_IF_INNODB_NOT_STARTED(tables->schema_table_name); + /* deny access to non-superusers */ if (check_global_access(thd, PROCESS_ACL)) { DBUG_RETURN(0); @@ -3610,6 +3624,8 @@ i_s_sys_stats_fill_table( DBUG_ENTER("i_s_sys_stats_fill_table"); + RETURN_IF_INNODB_NOT_STARTED(tables->schema_table_name); + /* deny access to non-superusers */ if (check_global_access(thd, PROCESS_ACL)) { DBUG_RETURN(0); @@ -4030,6 +4046,8 @@ i_s_innodb_table_stats_fill( DBUG_ENTER("i_s_innodb_table_stats_fill"); + RETURN_IF_INNODB_NOT_STARTED(tables->schema_table_name); + /* deny access to non-superusers */ if (check_global_access(thd, PROCESS_ACL)) { DBUG_RETURN(0); @@ -4093,6 +4111,8 @@ i_s_innodb_index_stats_fill( DBUG_ENTER("i_s_innodb_index_stats_fill"); + RETURN_IF_INNODB_NOT_STARTED(tables->schema_table_name); + /* deny access to non-superusers */ if (check_global_access(thd, PROCESS_ACL)) { DBUG_RETURN(0); @@ -4285,6 +4305,8 @@ i_s_innodb_admin_command_fill( DBUG_ENTER("i_s_innodb_admin_command_fill"); + RETURN_IF_INNODB_NOT_STARTED(tables->schema_table_name); + /* deny access to non-superusers */ if (check_global_access(thd, PROCESS_ACL)) { DBUG_RETURN(0); diff --git a/include/srv0srv.h b/include/srv0srv.h index 9e860ef285c..2a960089bc2 100644 --- a/include/srv0srv.h +++ b/include/srv0srv.h @@ -298,6 +298,7 @@ extern ibool srv_print_latch_waits; extern ulint srv_activity_count; extern ulint srv_fatal_semaphore_wait_threshold; +#define SRV_SEMAPHORE_WAIT_EXTENSION 7200 extern ulint srv_dml_needed_delay; extern lint srv_kill_idle_transaction; diff --git a/include/univ.i b/include/univ.i index 003f61ceb95..9a6142acf42 100644 --- a/include/univ.i +++ b/include/univ.i @@ -54,7 +54,7 @@ Created 1/20/1994 Heikki Tuuri #define INNODB_VERSION_BUGFIX 8 #ifndef PERCONA_INNODB_VERSION -#define PERCONA_INNODB_VERSION 20.1 +#define PERCONA_INNODB_VERSION 27.0 #endif diff --git a/srv/srv0start.c b/srv/srv0start.c index 34a2fdaa42a..ad9c73478c3 100644 --- a/srv/srv0start.c +++ b/srv/srv0start.c @@ -1507,10 +1507,18 @@ innobase_start_or_create_for_mysql(void) } # endif /* __WIN__ */ - os_aio_init(io_limit, - srv_n_read_io_threads, - srv_n_write_io_threads, - SRV_MAX_N_PENDING_SYNC_IOS); + if (!os_aio_init(io_limit, + srv_n_read_io_threads, + srv_n_write_io_threads, + SRV_MAX_N_PENDING_SYNC_IOS)) { + + ut_print_timestamp(stderr); + fprintf(stderr, + " InnoDB: Fatal error: cannot initialize AIO" + " sub-system\n"); + + return(DB_ERROR); + } fil_init(srv_file_per_table ? 50000 : 5000, srv_max_n_open_files); diff --git a/sync/sync0arr.c b/sync/sync0arr.c index b47c32f5bbf..5f293ad6a55 100644 --- a/sync/sync0arr.c +++ b/sync/sync0arr.c @@ -926,6 +926,11 @@ sync_array_print_long_waits( ibool fatal = FALSE; double longest_diff = 0; + /* For huge tables, skip the check during CHECK TABLE etc... */ + if (fatal_timeout > SRV_SEMAPHORE_WAIT_EXTENSION) { + return(FALSE); + } + #ifdef UNIV_DEBUG_VALGRIND /* Increase the timeouts if running under valgrind because it executes extremely slowly. UNIV_DEBUG_VALGRIND does not necessary mean that From 115a2967563d3ac734ce371260098710ba42cdf0 Mon Sep 17 00:00:00 2001 From: Sergei Golubchik Date: Wed, 22 Aug 2012 16:10:31 +0200 Subject: [PATCH 118/164] merge with XtraDB as of Percona-Server-5.1.63-rel13.4 --- mysql-test/suite/innodb/t/disabled.def | 5 - mysql-test/suite/innodb_plugin/t/disabled.def | 6 - storage/xtradb/ChangeLog | 178 ++++++- storage/xtradb/btr/btr0btr.c | 244 ++++++---- storage/xtradb/btr/btr0cur.c | 357 +++++++------- storage/xtradb/btr/btr0pcur.c | 78 ++- storage/xtradb/btr/btr0sea.c | 262 ++++++----- storage/xtradb/buf/buf0buddy.c | 2 +- storage/xtradb/buf/buf0buf.c | 183 ++------ storage/xtradb/buf/buf0lru.c | 8 +- storage/xtradb/compile-innodb | 24 + storage/xtradb/compile-innodb-debug | 24 + storage/xtradb/dict/dict0crea.c | 4 +- storage/xtradb/dict/dict0dict.c | 82 +++- storage/xtradb/dict/dict0load.c | 4 +- storage/xtradb/fil/fil0fil.c | 107 +++-- storage/xtradb/fsp/fsp0fsp.c | 444 ++++++++++-------- storage/xtradb/ha/ha0ha.c | 69 +-- storage/xtradb/handler/ha_innodb.cc | 269 +++++++++-- storage/xtradb/handler/ha_innodb.h | 1 + storage/xtradb/handler/handler0alter.cc | 12 +- storage/xtradb/handler/i_s.cc | 2 +- storage/xtradb/ibuf/ibuf0ibuf.c | 87 ++-- storage/xtradb/include/btr0btr.h | 59 ++- storage/xtradb/include/btr0btr.ic | 10 +- storage/xtradb/include/btr0cur.h | 84 ++-- storage/xtradb/include/btr0cur.ic | 29 +- storage/xtradb/include/btr0pcur.h | 8 - storage/xtradb/include/btr0pcur.ic | 32 -- storage/xtradb/include/btr0sea.h | 34 +- storage/xtradb/include/btr0types.h | 25 +- storage/xtradb/include/buf0buf.h | 59 +-- storage/xtradb/include/buf0buf.ic | 6 +- storage/xtradb/include/db0err.h | 2 + storage/xtradb/include/dict0dict.h | 14 +- storage/xtradb/include/dict0dict.ic | 21 +- storage/xtradb/include/dict0mem.h | 10 +- storage/xtradb/include/fil0fil.h | 20 +- storage/xtradb/include/fsp0fsp.h | 44 +- storage/xtradb/include/ha0ha.h | 23 +- storage/xtradb/include/ha0ha.ic | 54 +-- storage/xtradb/include/log0log.h | 6 +- storage/xtradb/include/mem0mem.ic | 4 - storage/xtradb/include/mtr0mtr.h | 17 +- storage/xtradb/include/mtr0mtr.ic | 7 +- storage/xtradb/include/page0page.h | 15 +- storage/xtradb/include/page0page.ic | 6 +- storage/xtradb/include/row0upd.ic | 6 - storage/xtradb/include/sync0rw.h | 3 +- storage/xtradb/include/sync0rw.ic | 5 +- storage/xtradb/include/sync0sync.h | 10 +- storage/xtradb/include/trx0purge.h | 4 +- storage/xtradb/include/trx0rec.ic | 7 +- storage/xtradb/include/trx0rseg.ic | 9 +- storage/xtradb/include/trx0sys.h | 6 + storage/xtradb/include/trx0undo.h | 57 ++- storage/xtradb/include/univ.i | 17 - storage/xtradb/include/ut0mem.h | 31 +- storage/xtradb/include/ut0rnd.ic | 2 +- storage/xtradb/lock/lock0lock.c | 14 +- storage/xtradb/log/log0log.c | 6 +- storage/xtradb/mem/mem0pool.c | 6 +- storage/xtradb/mtr/mtr0mtr.c | 4 +- storage/xtradb/mysql-test/patches/README | 30 ++ .../patches/index_merge_innodb-explain.diff | 31 ++ .../patches/information_schema.diff | 124 +++++ .../patches/innodb_file_per_table.diff | 47 ++ .../patches/innodb_lock_wait_timeout.diff | 55 +++ .../innodb_thread_concurrency_basic.diff | 31 ++ .../mysql-test/patches/partition_innodb.diff | 59 +++ storage/xtradb/os/os0file.c | 7 +- storage/xtradb/os/os0proc.c | 3 - storage/xtradb/page/page0cur.c | 6 +- storage/xtradb/page/page0page.c | 20 +- storage/xtradb/revert_gen.sh | 8 + storage/xtradb/row/row0ins.c | 79 +++- storage/xtradb/row/row0merge.c | 35 +- storage/xtradb/row/row0mysql.c | 106 ++++- storage/xtradb/row/row0purge.c | 20 +- storage/xtradb/row/row0row.c | 29 +- storage/xtradb/row/row0sel.c | 24 +- storage/xtradb/row/row0upd.c | 61 ++- storage/xtradb/scripts/export.sh | 74 +++ .../xtradb/scripts/install_innodb_plugins.sql | 8 - .../scripts/install_innodb_plugins_win.sql | 8 - storage/xtradb/setup.sh | 47 ++ storage/xtradb/sync/sync0rw.c | 7 + storage/xtradb/sync/sync0sync.c | 37 +- storage/xtradb/trx/trx0purge.c | 4 +- storage/xtradb/trx/trx0rec.c | 105 +++-- storage/xtradb/trx/trx0sys.c | 42 +- storage/xtradb/trx/trx0trx.c | 2 + storage/xtradb/trx/trx0undo.c | 109 +++-- .../ut/ut0auxconf_atomic_pthread_t_gcc.c | 43 ++ .../ut/ut0auxconf_atomic_pthread_t_solaris.c | 54 +++ .../xtradb/ut/ut0auxconf_have_gcc_atomics.c | 61 +++ .../ut/ut0auxconf_have_solaris_atomics.c | 39 ++ storage/xtradb/ut/ut0auxconf_pause.c | 32 ++ .../xtradb/ut/ut0auxconf_sizeof_pthread_t.c | 35 ++ storage/xtradb/ut/ut0mem.c | 82 +--- 100 files changed, 3124 insertions(+), 1668 deletions(-) create mode 100644 storage/xtradb/compile-innodb create mode 100644 storage/xtradb/compile-innodb-debug create mode 100644 storage/xtradb/mysql-test/patches/README create mode 100644 storage/xtradb/mysql-test/patches/index_merge_innodb-explain.diff create mode 100644 storage/xtradb/mysql-test/patches/information_schema.diff create mode 100644 storage/xtradb/mysql-test/patches/innodb_file_per_table.diff create mode 100644 storage/xtradb/mysql-test/patches/innodb_lock_wait_timeout.diff create mode 100644 storage/xtradb/mysql-test/patches/innodb_thread_concurrency_basic.diff create mode 100644 storage/xtradb/mysql-test/patches/partition_innodb.diff create mode 100644 storage/xtradb/revert_gen.sh create mode 100644 storage/xtradb/scripts/export.sh create mode 100644 storage/xtradb/setup.sh create mode 100644 storage/xtradb/ut/ut0auxconf_atomic_pthread_t_gcc.c create mode 100644 storage/xtradb/ut/ut0auxconf_atomic_pthread_t_solaris.c create mode 100644 storage/xtradb/ut/ut0auxconf_have_gcc_atomics.c create mode 100644 storage/xtradb/ut/ut0auxconf_have_solaris_atomics.c create mode 100644 storage/xtradb/ut/ut0auxconf_pause.c create mode 100644 storage/xtradb/ut/ut0auxconf_sizeof_pthread_t.c diff --git a/mysql-test/suite/innodb/t/disabled.def b/mysql-test/suite/innodb/t/disabled.def index 1d25fbf14c0..6795892ecae 100644 --- a/mysql-test/suite/innodb/t/disabled.def +++ b/mysql-test/suite/innodb/t/disabled.def @@ -10,10 +10,5 @@ # ############################################################################## -innodb_bug13635833: Disabled until merging with XtraDB 5.1.63 - -innodb-lock: Disabled until merging with XtraDB 5.1.60 -innodb_replace: Disabled until merging with XtraDB 5.1.60 - innodb_bug14007649: Disabled until merging with XtraDB 5.1.65 diff --git a/mysql-test/suite/innodb_plugin/t/disabled.def b/mysql-test/suite/innodb_plugin/t/disabled.def index a849d589fb2..d692eccac74 100644 --- a/mysql-test/suite/innodb_plugin/t/disabled.def +++ b/mysql-test/suite/innodb_plugin/t/disabled.def @@ -10,11 +10,5 @@ # ############################################################################## -innodb_bug13635833: Disabled until merging with XtraDB 5.1.63 - innodb_bug52745: Disabled as this has valgrind failures (also in MySQL 5.1.50) -innodb-index: Disabled until merging with XtraDB 5.1.60 -innodb-lock: Disabled until merging with XtraDB 5.1.60 -innodb_replace: Disabled until merging with XtraDB 5.1.60 -innodb-blob: Disabled until merging with XtraDB 5.1.63 innodb_bug14007649: Disabled until merging with XtraDB 5.1.65 diff --git a/storage/xtradb/ChangeLog b/storage/xtradb/ChangeLog index 7a4cacb5b43..1588132fc8b 100644 --- a/storage/xtradb/ChangeLog +++ b/storage/xtradb/ChangeLog @@ -1,8 +1,182 @@ +2012-03-15 The InnoDB Team + + * fil/fil0fil.c, ibuf/ibuf0ibuf.c, include/fil0fil.h, + lock/lock0lock.c: + Fix Bug#13825266 RACE IN LOCK_VALIDATE() WHEN ACCESSING PAGES + DIRECTLY FROM BUFFER POOL + +2012-03-15 The InnoDB Team + + * handler/ha_innodb.cc: + Fix Bug#13851171STRING OVERFLOW IN INNODB CODE FOUND BY STATIC + ANALYSIS + +2012-03-15 The InnoDB Team + + * include/sync0rw.ic: + Fix Bug#13537504 VALGRIND: COND. JUMP/MOVE DEPENDS ON + UNINITIALISED VALUES IN OS_THREAD_EQ + +2012-03-08 The InnoDB Team + + * btr/btr0pcur.c: + Fix Bug#13807811 BTR_PCUR_RESTORE_POSITION() CAN SKIP A RECORD + +2012-02-28 The InnoDB Team + + * btr/btr0btr.c, dict/dict0dict.c, include/btr0btr.h, + include/dict0dict.h, include/dict0dict.ic, include/dict0mem.h, + handler/handler0alter.cc, row/row0mysql.c: + Fix Bug#12861864 RACE CONDITION IN BTR_GET_SIZE() AND + DROP INDEX/TABLE/DATABASE + +2012-02-15 The InnoDB Team + + * btr/btr0btr.c, btr/btr0cur.c, fsp/fsp0fsp.c, ibuf/ibuf0ibuf.c, + include/btr0btr.h, include/btr0cur.h, include/btr0cur.ic, + include/buf0buf.h, include/buf0buf.ic, include/fsp0fsp.h, + include/mtr0mtr.h, include/mtr0mtr.ic, include/page0page.h, + include/page0page.ic, include/trx0rec.ic, include/trx0undo.h, + mtr/mtr0mtr.c, page/page0cur.c, page/page0page.c, row/row0ins.c, + row/row0row.c, row/row0upd.c, trx/trx0rec.c, trx/trx0sys.c, + trx/trx0undo.c: + Fix Bug#13721257 RACE CONDITION IN UPDATES OR INSERTS OF WIDE RECORDS + +2012-02-06 The InnoDB Team + + * handler/ha_innodb.cc: + Fix Bug#11754376 45976: INNODB LOST FILES FOR TEMPORARY TABLES ON + GRACEFUL SHUTDOWN + +2012-01-30 The InnoDB Team + + * fil/fil0fil.c: + Fix Bug#13636122 THE ORIGINAL TABLE MISSING WHILE EXECUTE THE + DDL 'ALTER TABLE ADD COLUMN' + +2012-01-16 The InnoDB Team + + * ibuf/ibuf0ibuf.c: + Fix Bug#13496818 ASSERTION: REC_PAGE_NO > 4 IN IBUF CONTRACTION + +2012-01-16 The InnoDB Team + + * handler/ha_innodb.cc: + Fix Bug#11765438: 58406: ISSUES WITH COPYING PARTITIONED INNODB + TABLES FROM LINUX TO WINDOWS + +2012-01-04 The InnoDB Team + + * row/row0mysql.c: + Fix Bug#12400341: INNODB CAN LEAVE ORPHAN IBD FILES AROUND + +2011-12-22 The InnoDB Team + + * row/row0sel.c: + Fix Bug#63775 Server crash on handler read next after delete record. +2011-12-21 The InnoDB Team + + * include/ut0rnd.ic: + Fix Bug#11866367:FPE WHEN SETTING INNODB_SPIN_WAIT_DELAY + +2011-12-13 The InnoDB Team + + * handler/ha_innodb.cc, innodb.test, innodb.result: + Fix Bug#13117023: InnoDB was incrementing the handler_read_key, + also the SSV::ha_read_key_count, at the wrong place. + +2011-12-10 The InnoDB Team + + * include/page0page.h, page/page0page.c: + Fix Bug#13418887 ERROR IN DIAGNOSTIC FUNCTION PAGE_REC_PRINT() + +2011-11-10 The InnoDB Team + + * handler/ha_innodb.cc, row/row0ins.c, innodb_replace.test: + Fix Bug#11759688 52020: InnoDB can still deadlock + on just INSERT...ON DUPLICATE KEY a.k.a. the reintroduction of + Bug#7975 deadlock without any locking, simple select and update + +2011-11-08 The InnoDB Team + + * btr/btr0pcur.c, include/btr0pcur.h, include/btr0pcur.ic: + Fix Bug#13358468 ASSERTION FAILURE IN BTR_PCUR_GET_BLOCK + +2011-10-27 The InnoDB Team + + * row/row0mysql.c: + Fix Bug #12884631 62146: TABLES ARE LOST FOR DDL + 2011-10-25 The InnoDB Team * handler/ha_innodb.cc, row/row0ins.c: Fix Bug#13002783 PARTIALLY UNINITIALIZED CASCADE UPDATE VECTOR +2011-10-20 The InnoDB Team + + * btr/btr0cur.c: + Fix Bug#13116045 Compilation failure using GCC 4.6.1 in btr/btr0cur.c + +2011-10-12 The InnoDB Team + + * btr/btr0cur.c, btr/btr0sea.c, buf/buf0buf.c, buf/buf0lru.c, + ha/ha0ha.c, handler/ha_innodb.cc, ibuf/ibuf0ibuf.c, include/btr0sea.h, + include/btr0types.h, include/buf0buf.h, include/ha0ha.h, + include/ha0ha.ic, include/row0upd.ic, include/sync0sync.h, + page/page0page.c, sync/sync0sync.c: + Fix Bug#13006367 62487: innodb takes 3 minutes to clean up + the adaptive hash index at shutdown + +2011-10-04 The InnoDB Team + + * include/sync0rw.h, sync/sync0rw.c: + Fix Bug#13034534 RQG TESTS FAIL ON WINDOWS WITH CRASH NEAR + RW_LOCK_DEBUG_PRINT + +2011-09-20 The InnoDB Team + + * row/row0purge.c: + Fix Bug#12963823 CRASH IN PURGE THREAD UNDER UNUSUAL CIRCUMSTANCES + +2011-09-12 The InnoDB Team + + * row/row0sel.c: + Fix Bug#12601439 CONSISTENT READ FAILURE IN COLUMN PREFIX INDEX + +2011-09-08 The InnoDB Team + + * btr/btr0cur.c, include/page0page.h, include/row0upd.ic: + Fix Bug#12948130 UNNECESSARY X-LOCKING OF ADAPTIVE HASH INDEX + +2011-09-06 The InnoDB Team + + * buf/buf0buddy.c: + Fix Bug#12950803 62294: BUF_BUDDY_RELOCATE CALLS GETTIMEOFDAY + WHILE HOLDING BUFFER POOL MUTEX + +2011-09-06 The InnoDB Team + + * include/trx0undo.h, trx/trx0rec.c, trx/trx0undo.c: + Fix Bug#12547647 UPDATE LOGGING COULD EXCEED LOG PAGE SIZE + +2011-08-29 The InnoDB Team + + * btr/btr0btr.c, btr/btr0cur.c, fsp/fsp0fsp.c, + include/btr0btr.h, include/btr0cur.h, include/fsp0fsp.h, + include/mtr0mtr.h, include/mtr0mtr.ic, mtr/mtr0mtr.c, + row/row0ins.c, row/row0row.c, row/row0upd.c, trx/trx0undo.c: + Fix Bug#12704861 Corruption after a crash during BLOB update + and other regressions from the fix of Bug#12612184 + +2011-08-15 The InnoDB Team + + * btr/btr0btr.c, btr/btr0cur.c, btr/btr0pcur.c, btr/btr0sea.c, + dict/dict0crea.c, dict/dict0dict.c, ibuf/ibuf0ibuf.c, + include/btr0btr.h, include/btr0btr.ic, include/sync0sync.h, + sync/sync0sync.c: + Fix Bug#11766591 59733: Possible deadlock when buffered changes + are to be discarded in buf_page_create() + 2011-08-08 The InnoDB Team * row/row0sel.c: @@ -170,7 +344,7 @@ 2011-01-06 The InnoDB Team * dict/dict0dict.c, handler/ha_innodb.cc, handler/i_s.cc, - include/univ.i: + include/univ.i: Fix Bug#58643 InnoDB: too long table name 2011-01-06 The InnoDB Team @@ -436,7 +610,7 @@ * handler/ha_innodb.cc, include/row0mysql.h, row/row0mysql.c: Fix Bug#53592: crash replacing duplicates into table after fast - alter table added unique key + alter table added unique key 2010-05-24 The InnoDB Team diff --git a/storage/xtradb/btr/btr0btr.c b/storage/xtradb/btr/btr0btr.c index 396ad422010..75cc80d0967 100644 --- a/storage/xtradb/btr/btr0btr.c +++ b/storage/xtradb/btr/btr0btr.c @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1994, 2011, Oracle and/or its affiliates. All Rights Reserved. +Copyright (c) 1994, 2012, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -11,8 +11,8 @@ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with -this program; if not, write to the Free Software Foundation, Inc., 59 Temple -Place, Suite 330, Boston, MA 02111-1307 USA +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA *****************************************************************************/ @@ -690,7 +690,8 @@ btr_root_block_get( zip_size = dict_table_zip_size(index->table); root_page_no = dict_index_get_page(index); - block = btr_block_get(space, zip_size, root_page_no, RW_X_LATCH, mtr); + block = btr_block_get(space, zip_size, root_page_no, RW_X_LATCH, + index, mtr); if (srv_pass_corrupt_table && !block) { return(0); @@ -897,7 +898,7 @@ btr_page_alloc_for_ibuf( dict_table_zip_size(index->table), node_addr.page, RW_X_LATCH, mtr); new_page = buf_block_get_frame(new_block); - buf_block_dbg_add_level(new_block, SYNC_TREE_NODE_NEW); + buf_block_dbg_add_level(new_block, SYNC_IBUF_TREE_NODE_NEW); flst_remove(root + PAGE_HEADER + PAGE_BTR_IBUF_FREE_LIST, new_page + PAGE_HEADER + PAGE_BTR_IBUF_FREE_LIST_NODE, @@ -911,28 +912,31 @@ btr_page_alloc_for_ibuf( /**************************************************************//** Allocates a new file page to be used in an index tree. NOTE: we assume that the caller has made the reservation for free extents! -@return new allocated block, x-latched; NULL if out of space */ -UNIV_INTERN +@retval NULL if no page could be allocated +@retval block, rw_lock_x_lock_count(&block->lock) == 1 if allocation succeeded +(init_mtr == mtr, or the page was not previously freed in mtr) +@retval block (not allocated or initialized) otherwise */ +static __attribute__((nonnull, warn_unused_result)) buf_block_t* -btr_page_alloc( -/*===========*/ +btr_page_alloc_low( +/*===============*/ dict_index_t* index, /*!< in: index */ ulint hint_page_no, /*!< in: hint of a good page */ byte file_direction, /*!< in: direction where a possible page split is made */ ulint level, /*!< in: level where the page is placed in the tree */ - mtr_t* mtr) /*!< in: mtr */ + mtr_t* mtr, /*!< in/out: mini-transaction + for the allocation */ + mtr_t* init_mtr) /*!< in/out: mtr or another + mini-transaction in which the + page should be initialized. + If init_mtr!=mtr, but the page + is already X-latched in mtr, do + not initialize the page. */ { fseg_header_t* seg_header; page_t* root; - buf_block_t* new_block; - ulint new_page_no; - - if (dict_index_is_ibuf(index)) { - - return(btr_page_alloc_for_ibuf(index, mtr)); - } root = btr_root_get(index, mtr); @@ -946,45 +950,81 @@ btr_page_alloc( reservation for free extents, and thus we know that a page can be allocated: */ - new_page_no = fseg_alloc_free_page_general(seg_header, hint_page_no, - file_direction, TRUE, mtr); - if (new_page_no == FIL_NULL) { + return(fseg_alloc_free_page_general( + seg_header, hint_page_no, file_direction, + TRUE, mtr, init_mtr)); +} - return(NULL); +/**************************************************************//** +Allocates a new file page to be used in an index tree. NOTE: we assume +that the caller has made the reservation for free extents! +@retval NULL if no page could be allocated +@retval block, rw_lock_x_lock_count(&block->lock) == 1 if allocation succeeded +(init_mtr == mtr, or the page was not previously freed in mtr) +@retval block (not allocated or initialized) otherwise */ +UNIV_INTERN +buf_block_t* +btr_page_alloc( +/*===========*/ + dict_index_t* index, /*!< in: index */ + ulint hint_page_no, /*!< in: hint of a good page */ + byte file_direction, /*!< in: direction where a possible + page split is made */ + ulint level, /*!< in: level where the page is placed + in the tree */ + mtr_t* mtr, /*!< in/out: mini-transaction + for the allocation */ + mtr_t* init_mtr) /*!< in/out: mini-transaction + for x-latching and initializing + the page */ +{ + buf_block_t* new_block; + + if (dict_index_is_ibuf(index)) { + + return(btr_page_alloc_for_ibuf(index, mtr)); } - new_block = buf_page_get(dict_index_get_space(index), - dict_table_zip_size(index->table), - new_page_no, RW_X_LATCH, mtr); - buf_block_dbg_add_level(new_block, SYNC_TREE_NODE_NEW); + new_block = btr_page_alloc_low( + index, hint_page_no, file_direction, level, mtr, init_mtr); + + if (new_block) { + buf_block_dbg_add_level(new_block, SYNC_TREE_NODE_NEW); + } return(new_block); } /**************************************************************//** Gets the number of pages in a B-tree. -@return number of pages */ +@return number of pages, or ULINT_UNDEFINED if the index is unavailable */ UNIV_INTERN ulint btr_get_size( /*=========*/ dict_index_t* index, /*!< in: index */ - ulint flag) /*!< in: BTR_N_LEAF_PAGES or BTR_TOTAL_SIZE */ + ulint flag, /*!< in: BTR_N_LEAF_PAGES or BTR_TOTAL_SIZE */ + mtr_t* mtr) /*!< in/out: mini-transaction where index + is s-latched */ { fseg_header_t* seg_header; page_t* root; ulint n; ulint dummy; - mtr_t mtr; - mtr_start(&mtr); + ut_ad(mtr_memo_contains(mtr, dict_index_get_lock(index), + MTR_MEMO_S_LOCK)); - mtr_s_lock(dict_index_get_lock(index), &mtr); + if (index->page == FIL_NULL + || index->to_be_dropped + || *index->name == TEMP_INDEX_PREFIX) { + return(ULINT_UNDEFINED); + } - root = btr_root_get(index, &mtr); + root = btr_root_get(index, mtr); if (srv_pass_corrupt_table && !root) { - mtr_commit(&mtr); + mtr_commit(mtr); return(0); } ut_a(root); @@ -992,22 +1032,20 @@ btr_get_size( if (flag == BTR_N_LEAF_PAGES) { seg_header = root + PAGE_HEADER + PAGE_BTR_SEG_LEAF; - fseg_n_reserved_pages(seg_header, &n, &mtr); + fseg_n_reserved_pages(seg_header, &n, mtr); } else if (flag == BTR_TOTAL_SIZE) { seg_header = root + PAGE_HEADER + PAGE_BTR_SEG_TOP; - n = fseg_n_reserved_pages(seg_header, &dummy, &mtr); + n = fseg_n_reserved_pages(seg_header, &dummy, mtr); seg_header = root + PAGE_HEADER + PAGE_BTR_SEG_LEAF; - n += fseg_n_reserved_pages(seg_header, &dummy, &mtr); + n += fseg_n_reserved_pages(seg_header, &dummy, mtr); } else { ut_error; } - mtr_commit(&mtr); - return(n); } @@ -1076,6 +1114,15 @@ btr_page_free_low( fseg_free_page(seg_header, buf_block_get_space(block), buf_block_get_page_no(block), mtr); + + /* The page was marked free in the allocation bitmap, but it + should remain buffer-fixed until mtr_commit(mtr) or until it + is explicitly freed from the mini-transaction. */ + ut_ad(mtr_memo_contains(mtr, block, MTR_MEMO_PAGE_X_FIX)); + /* TODO: Discard any operations on the page from the redo log + and remove the block from the flush list and the buffer pool. + This would free up buffer pool earlier and reduce writes to + both the tablespace and the redo log. */ } /**************************************************************//** @@ -1089,10 +1136,10 @@ btr_page_free( buf_block_t* block, /*!< in: block to be freed, x-latched */ mtr_t* mtr) /*!< in: mtr */ { - ulint level; - - level = btr_page_get_level(buf_block_get_frame(block), mtr); + const page_t* page = buf_block_get_frame(block); + ulint level = btr_page_get_level(page, mtr); + ut_ad(fil_page_get_type(block->frame) == FIL_PAGE_INDEX); btr_page_free_low(index, block, level, mtr); } @@ -1151,7 +1198,7 @@ btr_node_ptr_get_child( page_no = btr_node_ptr_get_child_page_no(node_ptr, offsets); return(btr_block_get(space, dict_table_zip_size(index->table), - page_no, RW_X_LATCH, mtr)); + page_no, RW_X_LATCH, index, mtr)); } /************************************************************//** @@ -1323,23 +1370,20 @@ btr_create( space, 0, IBUF_HEADER + IBUF_TREE_SEG_HEADER, mtr); - buf_block_dbg_add_level(ibuf_hdr_block, SYNC_TREE_NODE_NEW); + buf_block_dbg_add_level( + ibuf_hdr_block, SYNC_IBUF_TREE_NODE_NEW); ut_ad(buf_block_get_page_no(ibuf_hdr_block) == IBUF_HEADER_PAGE_NO); /* Allocate then the next page to the segment: it will be the tree root page */ - page_no = fseg_alloc_free_page(buf_block_get_frame( - ibuf_hdr_block) - + IBUF_HEADER - + IBUF_TREE_SEG_HEADER, - IBUF_TREE_ROOT_PAGE_NO, - FSP_UP, mtr); - ut_ad(page_no == IBUF_TREE_ROOT_PAGE_NO); - - block = buf_page_get(space, zip_size, page_no, - RW_X_LATCH, mtr); + block = fseg_alloc_free_page( + buf_block_get_frame(ibuf_hdr_block) + + IBUF_HEADER + IBUF_TREE_SEG_HEADER, + IBUF_TREE_ROOT_PAGE_NO, + FSP_UP, mtr); + ut_ad(buf_block_get_page_no(block) == IBUF_TREE_ROOT_PAGE_NO); } else { #ifdef UNIV_BLOB_DEBUG if ((type & DICT_CLUSTERED) && !index->blobs) { @@ -1360,10 +1404,9 @@ btr_create( page_no = buf_block_get_page_no(block); frame = buf_block_get_frame(block); - buf_block_dbg_add_level(block, SYNC_TREE_NODE_NEW); - if (type & DICT_IBUF) { /* It is an insert buffer tree: initialize the free list */ + buf_block_dbg_add_level(block, SYNC_IBUF_TREE_NODE_NEW); ut_ad(page_no == IBUF_TREE_ROOT_PAGE_NO); @@ -1371,6 +1414,8 @@ btr_create( } else { /* It is a non-ibuf tree: create a file segment for leaf pages */ + buf_block_dbg_add_level(block, SYNC_TREE_NODE_NEW); + if (!fseg_create(space, page_no, PAGE_HEADER + PAGE_BTR_SEG_LEAF, mtr)) { /* Not enough space for new segment, free root @@ -1442,14 +1487,15 @@ btr_free_but_not_root( leaf_loop: mtr_start(&mtr); - root = btr_page_get(space, zip_size, root_page_no, RW_X_LATCH, &mtr); + root = btr_page_get(space, zip_size, root_page_no, RW_X_LATCH, + NULL, &mtr); if (srv_pass_corrupt_table && !root) { mtr_commit(&mtr); return; } ut_a(root); - + #ifdef UNIV_BTR_DEBUG ut_a(btr_root_fseg_validate(FIL_PAGE_DATA + PAGE_BTR_SEG_LEAF + root, space)); @@ -1471,7 +1517,8 @@ leaf_loop: top_loop: mtr_start(&mtr); - root = btr_page_get(space, zip_size, root_page_no, RW_X_LATCH, &mtr); + root = btr_page_get(space, zip_size, root_page_no, RW_X_LATCH, + NULL, &mtr); if (srv_pass_corrupt_table && !root) { mtr_commit(&mtr); @@ -1503,13 +1550,13 @@ btr_free_root( ulint zip_size, /*!< in: compressed page size in bytes or 0 for uncompressed pages */ ulint root_page_no, /*!< in: root page number */ - mtr_t* mtr) /*!< in: a mini-transaction which has already - been started */ + mtr_t* mtr) /*!< in/out: mini-transaction */ { buf_block_t* block; fseg_header_t* header; - block = btr_block_get(space, zip_size, root_page_no, RW_X_LATCH, mtr); + block = btr_block_get(space, zip_size, root_page_no, RW_X_LATCH, + NULL, mtr); if (srv_pass_corrupt_table && !block) { return; @@ -1831,7 +1878,7 @@ btr_root_raise_and_insert( level = btr_page_get_level(root, mtr); - new_block = btr_page_alloc(index, 0, FSP_NO_DIR, level, mtr); + new_block = btr_page_alloc(index, 0, FSP_NO_DIR, level, mtr, mtr); new_page = buf_block_get_frame(new_block); new_page_zip = buf_block_get_page_zip(new_block); ut_a(!new_page_zip == !root_page_zip); @@ -2392,9 +2439,8 @@ btr_attach_half_pages( /* Update page links of the level */ if (prev_page_no != FIL_NULL) { - buf_block_t* prev_block = btr_block_get(space, zip_size, - prev_page_no, - RW_X_LATCH, mtr); + buf_block_t* prev_block = btr_block_get( + space, zip_size, prev_page_no, RW_X_LATCH, index, mtr); #ifdef UNIV_BTR_DEBUG ut_a(page_is_comp(prev_block->frame) == page_is_comp(page)); ut_a(btr_page_get_next(prev_block->frame, mtr) @@ -2407,9 +2453,8 @@ btr_attach_half_pages( } if (next_page_no != FIL_NULL) { - buf_block_t* next_block = btr_block_get(space, zip_size, - next_page_no, - RW_X_LATCH, mtr); + buf_block_t* next_block = btr_block_get( + space, zip_size, next_page_no, RW_X_LATCH, index, mtr); #ifdef UNIV_BTR_DEBUG ut_a(page_is_comp(next_block->frame) == page_is_comp(page)); ut_a(btr_page_get_prev(next_block->frame, mtr) @@ -2569,7 +2614,7 @@ func_start: /* 2. Allocate a new page to the index */ new_block = btr_page_alloc(cursor->index, hint_page_no, direction, - btr_page_get_level(page, mtr), mtr); + btr_page_get_level(page, mtr), mtr, mtr); new_page = buf_block_get_frame(new_block); new_page_zip = buf_block_get_page_zip(new_block); btr_page_create(new_block, new_page_zip, cursor->index, @@ -2831,17 +2876,42 @@ func_exit: return(rec); } +#ifdef UNIV_SYNC_DEBUG +/*************************************************************//** +Removes a page from the level list of pages. +@param space in: space where removed +@param zip_size in: compressed page size in bytes, or 0 for uncompressed +@param page in/out: page to remove +@param index in: index tree +@param mtr in/out: mini-transaction */ +# define btr_level_list_remove(space,zip_size,page,index,mtr) \ + btr_level_list_remove_func(space,zip_size,page,index,mtr) +#else /* UNIV_SYNC_DEBUG */ +/*************************************************************//** +Removes a page from the level list of pages. +@param space in: space where removed +@param zip_size in: compressed page size in bytes, or 0 for uncompressed +@param page in/out: page to remove +@param index in: index tree +@param mtr in/out: mini-transaction */ +# define btr_level_list_remove(space,zip_size,page,index,mtr) \ + btr_level_list_remove_func(space,zip_size,page,mtr) +#endif /* UNIV_SYNC_DEBUG */ + /*************************************************************//** Removes a page from the level list of pages. */ -static +static __attribute__((nonnull)) void -btr_level_list_remove( -/*==================*/ - ulint space, /*!< in: space where removed */ - ulint zip_size,/*!< in: compressed page size in bytes - or 0 for uncompressed pages */ - page_t* page, /*!< in: page to remove */ - mtr_t* mtr) /*!< in: mtr */ +btr_level_list_remove_func( +/*=======================*/ + ulint space, /*!< in: space where removed */ + ulint zip_size,/*!< in: compressed page size in bytes + or 0 for uncompressed pages */ + page_t* page, /*!< in/out: page to remove */ +#ifdef UNIV_SYNC_DEBUG + const dict_index_t* index, /*!< in: index tree */ +#endif /* UNIV_SYNC_DEBUG */ + mtr_t* mtr) /*!< in/out: mini-transaction */ { ulint prev_page_no; ulint next_page_no; @@ -2859,7 +2929,7 @@ btr_level_list_remove( if (prev_page_no != FIL_NULL) { buf_block_t* prev_block = btr_block_get(space, zip_size, prev_page_no, - RW_X_LATCH, mtr); + RW_X_LATCH, index, mtr); page_t* prev_page = buf_block_get_frame(prev_block); #ifdef UNIV_BTR_DEBUG @@ -2876,7 +2946,7 @@ btr_level_list_remove( if (next_page_no != FIL_NULL) { buf_block_t* next_block = btr_block_get(space, zip_size, next_page_no, - RW_X_LATCH, mtr); + RW_X_LATCH, index, mtr); page_t* next_page = buf_block_get_frame(next_block); #ifdef UNIV_BTR_DEBUG @@ -3202,7 +3272,7 @@ btr_compress( if (is_left) { merge_block = btr_block_get(space, zip_size, left_page_no, - RW_X_LATCH, mtr); + RW_X_LATCH, index, mtr); merge_page = buf_block_get_frame(merge_block); #ifdef UNIV_BTR_DEBUG ut_a(btr_page_get_next(merge_page, mtr) @@ -3211,7 +3281,7 @@ btr_compress( } else if (right_page_no != FIL_NULL) { merge_block = btr_block_get(space, zip_size, right_page_no, - RW_X_LATCH, mtr); + RW_X_LATCH, index, mtr); merge_page = buf_block_get_frame(merge_block); #ifdef UNIV_BTR_DEBUG ut_a(btr_page_get_prev(merge_page, mtr) @@ -3300,7 +3370,7 @@ err_exit: btr_search_drop_page_hash_index(block); /* Remove the page from the level list */ - btr_level_list_remove(space, zip_size, page, mtr); + btr_level_list_remove(space, zip_size, page, index, mtr); btr_node_ptr_delete(index, block, mtr); lock_update_merge_left(merge_block, orig_pred, block); @@ -3357,7 +3427,7 @@ err_exit: #endif /* UNIV_BTR_DEBUG */ /* Remove the page from the level list */ - btr_level_list_remove(space, zip_size, page, mtr); + btr_level_list_remove(space, zip_size, page, index, mtr); /* Replace the address of the old child node (= page) with the address of the merge page to the right */ @@ -3549,7 +3619,7 @@ btr_discard_page( if (left_page_no != FIL_NULL) { merge_block = btr_block_get(space, zip_size, left_page_no, - RW_X_LATCH, mtr); + RW_X_LATCH, index, mtr); merge_page = buf_block_get_frame(merge_block); #ifdef UNIV_BTR_DEBUG ut_a(btr_page_get_next(merge_page, mtr) @@ -3557,7 +3627,7 @@ btr_discard_page( #endif /* UNIV_BTR_DEBUG */ } else if (right_page_no != FIL_NULL) { merge_block = btr_block_get(space, zip_size, right_page_no, - RW_X_LATCH, mtr); + RW_X_LATCH, index, mtr); merge_page = buf_block_get_frame(merge_block); #ifdef UNIV_BTR_DEBUG ut_a(btr_page_get_prev(merge_page, mtr) @@ -3592,7 +3662,7 @@ btr_discard_page( btr_node_ptr_delete(index, block, mtr); /* Remove the page from the level list */ - btr_level_list_remove(space, zip_size, page, mtr); + btr_level_list_remove(space, zip_size, page, index, mtr); #ifdef UNIV_ZIP_DEBUG { page_zip_des_t* merge_page_zip @@ -4110,7 +4180,7 @@ loop: if (right_page_no != FIL_NULL) { const rec_t* right_rec; right_block = btr_block_get(space, zip_size, right_page_no, - RW_X_LATCH, &mtr); + RW_X_LATCH, index, &mtr); right_page = buf_block_get_frame(right_block); if (UNIV_UNLIKELY(btr_page_get_prev(right_page, &mtr) != page_get_page_no(page))) { @@ -4336,7 +4406,7 @@ node_ptr_fails: mtr_start(&mtr); block = btr_block_get(space, zip_size, right_page_no, - RW_X_LATCH, &mtr); + RW_X_LATCH, index, &mtr); page = buf_block_get_frame(block); goto loop; diff --git a/storage/xtradb/btr/btr0cur.c b/storage/xtradb/btr/btr0cur.c index 51a2f784fbf..4161be93a90 100644 --- a/storage/xtradb/btr/btr0cur.c +++ b/storage/xtradb/btr/btr0cur.c @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1994, 2011, Oracle and/or its affiliates. All Rights Reserved. +Copyright (c) 1994, 2012, Oracle and/or its affiliates. All Rights Reserved. Copyright (c) 2008, Google Inc. Portions of this file contain modifications contributed and copyrighted by @@ -18,8 +18,8 @@ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with -this program; if not, write to the Free Software Foundation, Inc., 59 Temple -Place, Suite 330, Boston, MA 02111-1307 USA +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA *****************************************************************************/ @@ -238,7 +238,9 @@ btr_cur_latch_leaves( case BTR_SEARCH_LEAF: case BTR_MODIFY_LEAF: mode = latch_mode == BTR_SEARCH_LEAF ? RW_S_LATCH : RW_X_LATCH; - get_block = btr_block_get(space, zip_size, page_no, mode, mtr); + + get_block = btr_block_get( + space, zip_size, page_no, mode, cursor->index, mtr); if (srv_pass_corrupt_table && !get_block) { return; @@ -254,9 +256,9 @@ btr_cur_latch_leaves( left_page_no = btr_page_get_prev(page, mtr); if (left_page_no != FIL_NULL) { - get_block = btr_block_get(space, zip_size, - left_page_no, - RW_X_LATCH, mtr); + get_block = btr_block_get( + space, zip_size, left_page_no, + RW_X_LATCH, cursor->index, mtr); if (srv_pass_corrupt_table && !get_block) { return; @@ -271,8 +273,9 @@ btr_cur_latch_leaves( get_block->check_index_page_at_flush = TRUE; } - get_block = btr_block_get(space, zip_size, page_no, - RW_X_LATCH, mtr); + get_block = btr_block_get( + space, zip_size, page_no, + RW_X_LATCH, cursor->index, mtr); if (srv_pass_corrupt_table && !get_block) { return; @@ -286,9 +289,9 @@ btr_cur_latch_leaves( right_page_no = btr_page_get_next(page, mtr); if (right_page_no != FIL_NULL) { - get_block = btr_block_get(space, zip_size, - right_page_no, - RW_X_LATCH, mtr); + get_block = btr_block_get( + space, zip_size, right_page_no, + RW_X_LATCH, cursor->index, mtr); if (srv_pass_corrupt_table && !get_block) { return; @@ -312,8 +315,9 @@ btr_cur_latch_leaves( left_page_no = btr_page_get_prev(page, mtr); if (left_page_no != FIL_NULL) { - get_block = btr_block_get(space, zip_size, - left_page_no, mode, mtr); + get_block = btr_block_get( + space, zip_size, + left_page_no, mode, cursor->index, mtr); cursor->left_block = get_block; if (srv_pass_corrupt_table && !get_block) { @@ -329,7 +333,8 @@ btr_cur_latch_leaves( get_block->check_index_page_at_flush = TRUE; } - get_block = btr_block_get(space, zip_size, page_no, mode, mtr); + get_block = btr_block_get( + space, zip_size, page_no, mode, cursor->index, mtr); if (srv_pass_corrupt_table && !get_block) { return; @@ -419,7 +424,12 @@ btr_cur_search_to_nth_level( ut_ad(dict_index_check_search_tuple(index, tuple)); ut_ad(!dict_index_is_ibuf(index) || ibuf_inside()); ut_ad(dtuple_check_typed(tuple)); + ut_ad(index->page != FIL_NULL); + UNIV_MEM_INVALID(&cursor->up_match, sizeof cursor->up_match); + UNIV_MEM_INVALID(&cursor->up_bytes, sizeof cursor->up_bytes); + UNIV_MEM_INVALID(&cursor->low_match, sizeof cursor->low_match); + UNIV_MEM_INVALID(&cursor->low_bytes, sizeof cursor->low_bytes); #ifdef UNIV_DEBUG cursor->up_match = ULINT_UNDEFINED; cursor->low_match = ULINT_UNDEFINED; @@ -622,7 +632,9 @@ retry_page_get: ut_a(!page_zip || page_zip_validate(page_zip, page)); #endif /* UNIV_ZIP_DEBUG */ - buf_block_dbg_add_level(block, SYNC_TREE_NODE); + buf_block_dbg_add_level( + block, dict_index_is_ibuf(index) + ? SYNC_IBUF_TREE_NODE : SYNC_TREE_NODE); } ut_ad(0 == ut_dulint_cmp(index->id, @@ -680,8 +692,8 @@ retry_page_get: if (level > 0) { /* x-latch the page */ - page = btr_page_get(space, zip_size, - page_no, RW_X_LATCH, mtr); + page = btr_page_get(space, zip_size, page_no, + RW_X_LATCH, index, mtr); ut_a((ibool)!!page_is_comp(page) == dict_table_is_comp(index->table)); } @@ -1822,6 +1834,7 @@ btr_cur_update_in_place( roll_ptr_t roll_ptr = ut_dulint_zero; trx_t* trx; ulint was_delete_marked; + ibool is_hashed; mem_heap_t* heap = NULL; ulint offsets_[REC_OFFS_NORMAL_SIZE]; ulint* offsets = offsets_; @@ -1846,7 +1859,7 @@ btr_cur_update_in_place( page_zip = buf_block_get_page_zip(block); /* Check that enough space is available on the compressed page. */ - if (UNIV_LIKELY_NULL(page_zip) + if (page_zip && !btr_cur_update_alloc_zip(page_zip, block, index, rec_offs_size(offsets), FALSE, mtr)) { return(DB_ZIP_OVERFLOW); @@ -1871,7 +1884,21 @@ btr_cur_update_in_place( return(err); /* == DB_SUCCESS */ } - if (block->is_hashed) { + if (!(flags & BTR_KEEP_SYS_FLAG)) { + row_upd_rec_sys_fields(rec, NULL, + index, offsets, trx, roll_ptr); + } + + was_delete_marked = rec_get_deleted_flag( + rec, page_is_comp(buf_block_get_frame(block))); + + is_hashed = (block->index != NULL); + + if (is_hashed) { + /* TO DO: Can we skip this if none of the fields + index->search_info->curr_n_fields + are being updated? */ + /* The function row_upd_changes_ord_field_binary works only if the update vector was built for a clustered index, we must NOT call it if index is secondary */ @@ -1887,17 +1914,9 @@ btr_cur_update_in_place( rw_lock_x_lock(&btr_search_latch); } - if (!(flags & BTR_KEEP_SYS_FLAG)) { - row_upd_rec_sys_fields(rec, NULL, - index, offsets, trx, roll_ptr); - } - - was_delete_marked = rec_get_deleted_flag( - rec, page_is_comp(buf_block_get_frame(block))); - row_upd_rec_in_place(rec, index, offsets, update, page_zip); - if (block->is_hashed) { + if (is_hashed) { rw_lock_x_unlock(&btr_search_latch); } @@ -2039,7 +2058,7 @@ any_extern: ut_a(!page_zip || page_zip_validate(page_zip, page)); #endif /* UNIV_ZIP_DEBUG */ - if (UNIV_LIKELY_NULL(page_zip) + if (page_zip && !btr_cur_update_alloc_zip(page_zip, block, index, new_rec_size, TRUE, mtr)) { err = DB_ZIP_OVERFLOW; @@ -2347,7 +2366,7 @@ btr_cur_pessimistic_update( ut_ad(rec_offs_validate(rec, index, offsets)); n_ext += btr_push_update_extern_fields(new_entry, update, *heap); - if (UNIV_LIKELY_NULL(page_zip)) { + if (page_zip) { ut_ad(page_is_comp(page)); if (page_zip_rec_needs_ext( rec_get_converted_size(index, new_entry, n_ext), @@ -2531,39 +2550,6 @@ return_after_reservations: return(err); } -/**************************************************************//** -Commits and restarts a mini-transaction so that it will retain an -x-lock on index->lock and the cursor page. */ -UNIV_INTERN -void -btr_cur_mtr_commit_and_start( -/*=========================*/ - btr_cur_t* cursor, /*!< in: cursor */ - mtr_t* mtr) /*!< in/out: mini-transaction */ -{ - buf_block_t* block; - - block = btr_cur_get_block(cursor); - - ut_ad(mtr_memo_contains(mtr, dict_index_get_lock(cursor->index), - MTR_MEMO_X_LOCK)); - ut_ad(mtr_memo_contains(mtr, block, MTR_MEMO_PAGE_X_FIX)); - /* Keep the locks across the mtr_commit(mtr). */ - rw_lock_x_lock(dict_index_get_lock(cursor->index)); - rw_lock_x_lock(&block->lock); - mutex_enter(&block->mutex); - buf_block_buf_fix_inc(block, __FILE__, __LINE__); - mutex_exit(&block->mutex); - /* Write out the redo log. */ - mtr_commit(mtr); - mtr_start(mtr); - /* Reassociate the locks with the mini-transaction. - They will be released on mtr_commit(mtr). */ - mtr_memo_push(mtr, dict_index_get_lock(cursor->index), - MTR_MEMO_X_LOCK); - mtr_memo_push(mtr, block, MTR_MEMO_PAGE_X_FIX); -} - /*==================== B-TREE DELETE MARK AND UNMARK ===============*/ /****************************************************************//** @@ -2670,7 +2656,8 @@ btr_cur_parse_del_mark_set_clust_rec( /* We do not need to reserve btr_search_latch, as the page is only being recovered, and there cannot be a hash index to - it. */ + it. Besides, these fields are being updated in place + and the adaptive hash index does not depend on them. */ btr_rec_set_deleted_flag(rec, page_zip, val); @@ -2755,9 +2742,9 @@ btr_cur_del_mark_set_clust_rec( return(err); } - if (block->is_hashed) { - rw_lock_x_lock(&btr_search_latch); - } + /* The btr_search_latch is not needed here, because + the adaptive hash index does not depend on the delete-mark + and the delete-mark is being updated in place. */ page_zip = buf_block_get_page_zip(block); @@ -2771,10 +2758,6 @@ btr_cur_del_mark_set_clust_rec( index, offsets, trx, roll_ptr); } - if (block->is_hashed) { - rw_lock_x_unlock(&btr_search_latch); - } - btr_cur_del_mark_set_clust_rec_log(flags, rec, index, val, trx, roll_ptr, mtr); @@ -2850,7 +2833,8 @@ btr_cur_parse_del_mark_set_sec_rec( /* We do not need to reserve btr_search_latch, as the page is only being recovered, and there cannot be a hash index to - it. */ + it. Besides, the delete-mark flag is being updated in place + and the adaptive hash index does not depend on it. */ btr_rec_set_deleted_flag(rec, page_zip, val); } @@ -2903,16 +2887,11 @@ btr_cur_del_mark_set_sec_rec( ut_ad(!!page_rec_is_comp(rec) == dict_table_is_comp(cursor->index->table)); - if (block->is_hashed) { - rw_lock_x_lock(&btr_search_latch); - } - + /* We do not need to reserve btr_search_latch, as the + delete-mark flag is being updated in place and the adaptive + hash index does not depend on it. */ btr_rec_set_deleted_flag(rec, buf_block_get_page_zip(block), val); - if (block->is_hashed) { - rw_lock_x_unlock(&btr_search_latch); - } - btr_cur_del_mark_set_sec_rec_log(rec, val, mtr); return(DB_SUCCESS); @@ -2932,8 +2911,11 @@ btr_cur_del_unmark_for_ibuf( uncompressed */ mtr_t* mtr) /*!< in: mtr */ { - /* We do not need to reserve btr_search_latch, as the page has just - been read to the buffer pool and there cannot be a hash index to it. */ + /* We do not need to reserve btr_search_latch, as the page + has just been read to the buffer pool and there cannot be + a hash index to it. Besides, the delete-mark flag is being + updated in place and the adaptive hash index does not depend + on it. */ btr_rec_set_deleted_flag(rec, page_zip, FALSE); @@ -3581,7 +3563,6 @@ static void btr_record_not_null_field_in_rec( /*=============================*/ - rec_t* rec __attribute__ ((unused)),/*!< in: physical record */ ulint n_unique, /*!< in: dict_index_get_n_unique(index), number of columns uniquely determine an index entry */ @@ -3600,16 +3581,11 @@ btr_record_not_null_field_in_rec( } for (i = 0; i < n_unique; i++) { - ulint rec_len; - - rec_get_nth_field_offs(offsets, i, &rec_len); - - if (rec_len != UNIV_SQL_NULL) { - n_not_null[i]++; - } else { + if (rec_offs_nth_sql_null(offsets, i)) { /* Break if we hit the first NULL value */ break; } + n_not_null[i]++; } } @@ -3722,7 +3698,7 @@ btr_estimate_number_of_different_key_vals( if (n_not_null) { btr_record_not_null_field_in_rec( - rec, n_cols, offsets_rec, n_not_null); + n_cols, offsets_rec, n_not_null); } } @@ -3757,8 +3733,7 @@ btr_estimate_number_of_different_key_vals( if (n_not_null) { btr_record_not_null_field_in_rec( - next_rec, n_cols, offsets_next_rec, - n_not_null); + n_cols, offsets_next_rec, n_not_null); } total_external_size @@ -3949,10 +3924,10 @@ btr_cur_set_ownership_of_extern_field( byte_val = byte_val | BTR_EXTERN_OWNER_FLAG; } - if (UNIV_LIKELY_NULL(page_zip)) { + if (page_zip) { mach_write_to_1(data + local_len + BTR_EXTERN_LEN, byte_val); page_zip_write_blob_ptr(page_zip, rec, index, offsets, i, mtr); - } else if (UNIV_LIKELY(mtr != NULL)) { + } else if (mtr != NULL) { mlog_write_ulint(data + local_len + BTR_EXTERN_LEN, byte_val, MLOG_1BYTE, mtr); @@ -4190,9 +4165,9 @@ The fields are stored on pages allocated from leaf node file segment of the index tree. @return DB_SUCCESS or DB_OUT_OF_FILE_SPACE */ UNIV_INTERN -ulint -btr_store_big_rec_extern_fields_func( -/*=================================*/ +enum db_err +btr_store_big_rec_extern_fields( +/*============================*/ dict_index_t* index, /*!< in: index of rec; the index tree MUST be X-latched */ buf_block_t* rec_block, /*!< in/out: block containing rec */ @@ -4201,38 +4176,37 @@ btr_store_big_rec_extern_fields_func( the "external storage" flags in offsets will not correspond to rec when this function returns */ -#ifdef UNIV_DEBUG - mtr_t* local_mtr, /*!< in: mtr containing the - latch to rec and to the tree */ -#endif /* UNIV_DEBUG */ -#if defined UNIV_DEBUG || defined UNIV_BLOB_LIGHT_DEBUG - ibool update_in_place,/*! in: TRUE if the record is updated - in place (not delete+insert) */ -#endif /* UNIV_DEBUG || UNIV_BLOB_LIGHT_DEBUG */ - const big_rec_t*big_rec_vec) /*!< in: vector containing fields + const big_rec_t*big_rec_vec, /*!< in: vector containing fields to be stored externally */ - + mtr_t* btr_mtr, /*!< in: mtr containing the + latches to the clustered index */ + enum blob_op op) /*! in: operation code */ { - ulint rec_page_no; - byte* field_ref; - ulint extern_len; - ulint store_len; - ulint page_no; - ulint space_id; - ulint zip_size; - ulint prev_page_no; - ulint hint_page_no; - ulint i; - mtr_t mtr; - mem_heap_t* heap = NULL; + ulint rec_page_no; + byte* field_ref; + ulint extern_len; + ulint store_len; + ulint page_no; + ulint space_id; + ulint zip_size; + ulint prev_page_no; + ulint hint_page_no; + ulint i; + mtr_t mtr; + mtr_t* alloc_mtr; + mem_heap_t* heap = NULL; page_zip_des_t* page_zip; - z_stream c_stream; + z_stream c_stream; + buf_block_t** freed_pages = NULL; + ulint n_freed_pages = 0; + enum db_err error = DB_SUCCESS; ut_ad(rec_offs_validate(rec, index, offsets)); ut_ad(rec_offs_any_extern(offsets)); - ut_ad(mtr_memo_contains(local_mtr, dict_index_get_lock(index), + ut_ad(btr_mtr); + ut_ad(mtr_memo_contains(btr_mtr, dict_index_get_lock(index), MTR_MEMO_X_LOCK)); - ut_ad(mtr_memo_contains(local_mtr, rec_block, MTR_MEMO_PAGE_X_FIX)); + ut_ad(mtr_memo_contains(btr_mtr, rec_block, MTR_MEMO_PAGE_X_FIX)); ut_ad(buf_block_get_frame(rec_block) == page_align(rec)); ut_a(dict_index_is_clust(index)); @@ -4245,7 +4219,7 @@ btr_store_big_rec_extern_fields_func( rec_page_no = buf_block_get_page_no(rec_block); ut_a(fil_page_get_type(page_align(rec)) == FIL_PAGE_INDEX); - if (UNIV_LIKELY_NULL(page_zip)) { + if (page_zip) { int err; /* Zlib deflate needs 128 kilobytes for the default @@ -4261,6 +4235,42 @@ btr_store_big_rec_extern_fields_func( ut_a(err == Z_OK); } + if (btr_blob_op_is_update(op)) { + /* Avoid reusing pages that have been previously freed + in btr_mtr. */ + if (btr_mtr->n_freed_pages) { + if (heap == NULL) { + heap = mem_heap_create( + btr_mtr->n_freed_pages + * sizeof *freed_pages); + } + + freed_pages = mem_heap_alloc( + heap, + btr_mtr->n_freed_pages + * sizeof *freed_pages); + n_freed_pages = 0; + } + + /* Because btr_mtr will be committed after mtr, it is + possible that the tablespace has been extended when + the B-tree record was updated or inserted, or it will + be extended while allocating pages for big_rec. + + TODO: In mtr (not btr_mtr), write a redo log record + about extending the tablespace to its current size, + and remember the current size. Whenever the tablespace + grows as pages are allocated, write further redo log + records to mtr. (Currently tablespace extension is not + covered by the redo log. If it were, the record would + only be written to btr_mtr, which is committed after + mtr.) */ + alloc_mtr = btr_mtr; + } else { + /* Use the local mtr for allocations. */ + alloc_mtr = &mtr; + } + #if defined UNIV_DEBUG || defined UNIV_BLOB_LIGHT_DEBUG /* All pointers to externally stored columns in the record must either be zero or they must be pointers to inherited @@ -4275,7 +4285,7 @@ btr_store_big_rec_extern_fields_func( /* Either this must be an update in place, or the BLOB must be inherited, or the BLOB pointer must be zero (will be written in this function). */ - ut_a(update_in_place + ut_a(op == BTR_STORE_UPDATE || (field_ref[BTR_EXTERN_LEN] & BTR_EXTERN_INHERITED_FLAG) || !memcmp(field_ref, field_ref_zero, BTR_EXTERN_FIELD_REF_SIZE)); @@ -4300,7 +4310,7 @@ btr_store_big_rec_extern_fields_func( prev_page_no = FIL_NULL; - if (UNIV_LIKELY_NULL(page_zip)) { + if (page_zip) { int err = deflateReset(&c_stream); ut_a(err == Z_OK); @@ -4320,18 +4330,24 @@ btr_store_big_rec_extern_fields_func( hint_page_no = prev_page_no + 1; } +alloc_another: block = btr_page_alloc(index, hint_page_no, - FSP_NO_DIR, 0, &mtr); + FSP_NO_DIR, 0, alloc_mtr, &mtr); if (UNIV_UNLIKELY(block == NULL)) { - mtr_commit(&mtr); + error = DB_OUT_OF_FILE_SPACE; + goto func_exit; + } - if (UNIV_LIKELY_NULL(page_zip)) { - deflateEnd(&c_stream); - mem_heap_free(heap); - } - - return(DB_OUT_OF_FILE_SPACE); + if (rw_lock_get_x_lock_count(&block->lock) > 1) { + /* This page must have been freed in + btr_mtr previously. Put it aside, and + allocate another page for the BLOB data. */ + ut_ad(alloc_mtr == btr_mtr); + ut_ad(btr_blob_op_is_update(op)); + ut_ad(n_freed_pages < btr_mtr->n_freed_pages); + freed_pages[n_freed_pages++] = block; + goto alloc_another; } page_no = buf_block_get_page_no(block); @@ -4348,7 +4364,7 @@ btr_store_big_rec_extern_fields_func( SYNC_EXTERN_STORAGE); prev_page = buf_block_get_frame(prev_block); - if (UNIV_LIKELY_NULL(page_zip)) { + if (page_zip) { mlog_write_ulint( prev_page + FIL_PAGE_NEXT, page_no, MLOG_4BYTES, &mtr); @@ -4365,7 +4381,7 @@ btr_store_big_rec_extern_fields_func( } - if (UNIV_LIKELY_NULL(page_zip)) { + if (page_zip) { int err; page_zip_des_t* blob_page_zip; @@ -4448,11 +4464,15 @@ btr_store_big_rec_extern_fields_func( goto next_zip_page; } - rec_block = buf_page_get(space_id, zip_size, - rec_page_no, - RW_X_LATCH, &mtr); - buf_block_dbg_add_level(rec_block, - SYNC_NO_ORDER_CHECK); + if (alloc_mtr == &mtr) { + rec_block = buf_page_get( + space_id, zip_size, + rec_page_no, + RW_X_LATCH, &mtr); + buf_block_dbg_add_level( + rec_block, + SYNC_NO_ORDER_CHECK); + } if (err == Z_STREAM_END) { mach_write_to_4(field_ref @@ -4486,7 +4506,8 @@ btr_store_big_rec_extern_fields_func( page_zip_write_blob_ptr( page_zip, rec, index, offsets, - big_rec_vec->fields[i].field_no, &mtr); + big_rec_vec->fields[i].field_no, + alloc_mtr); next_zip_page: prev_page_no = page_no; @@ -4531,19 +4552,23 @@ next_zip_page: extern_len -= store_len; - rec_block = buf_page_get(space_id, zip_size, - rec_page_no, - RW_X_LATCH, &mtr); - buf_block_dbg_add_level(rec_block, - SYNC_NO_ORDER_CHECK); + if (alloc_mtr == &mtr) { + rec_block = buf_page_get( + space_id, zip_size, + rec_page_no, + RW_X_LATCH, &mtr); + buf_block_dbg_add_level( + rec_block, + SYNC_NO_ORDER_CHECK); + } mlog_write_ulint(field_ref + BTR_EXTERN_LEN, 0, - MLOG_4BYTES, &mtr); + MLOG_4BYTES, alloc_mtr); mlog_write_ulint(field_ref + BTR_EXTERN_LEN + 4, big_rec_vec->fields[i].len - extern_len, - MLOG_4BYTES, &mtr); + MLOG_4BYTES, alloc_mtr); if (prev_page_no == FIL_NULL) { btr_blob_dbg_add_blob( @@ -4553,18 +4578,19 @@ next_zip_page: mlog_write_ulint(field_ref + BTR_EXTERN_SPACE_ID, - space_id, - MLOG_4BYTES, &mtr); + space_id, MLOG_4BYTES, + alloc_mtr); mlog_write_ulint(field_ref + BTR_EXTERN_PAGE_NO, - page_no, - MLOG_4BYTES, &mtr); + page_no, MLOG_4BYTES, + alloc_mtr); mlog_write_ulint(field_ref + BTR_EXTERN_OFFSET, FIL_PAGE_DATA, - MLOG_4BYTES, &mtr); + MLOG_4BYTES, + alloc_mtr); } prev_page_no = page_no; @@ -4578,8 +4604,23 @@ next_zip_page: } } - if (UNIV_LIKELY_NULL(page_zip)) { +func_exit: + if (page_zip) { deflateEnd(&c_stream); + } + + if (n_freed_pages) { + ulint i; + + ut_ad(alloc_mtr == btr_mtr); + ut_ad(btr_blob_op_is_update(op)); + + for (i = 0; i < n_freed_pages; i++) { + btr_page_free_low(index, freed_pages[i], 0, alloc_mtr); + } + } + + if (heap != NULL) { mem_heap_free(heap); } @@ -4600,7 +4641,7 @@ next_zip_page: ut_a(!(field_ref[BTR_EXTERN_LEN] & BTR_EXTERN_OWNER_FLAG)); } #endif /* UNIV_DEBUG || UNIV_BLOB_LIGHT_DEBUG */ - return(DB_SUCCESS); + return(error); } /*******************************************************************//** @@ -4805,7 +4846,7 @@ btr_free_externally_stored_field( btr_page_free_low(index, ext_block, 0, &mtr); - if (UNIV_LIKELY(page_zip != NULL)) { + if (page_zip) { mach_write_to_4(field_ref + BTR_EXTERN_PAGE_NO, next_page_no); mach_write_to_4(field_ref + BTR_EXTERN_LEN + 4, diff --git a/storage/xtradb/btr/btr0pcur.c b/storage/xtradb/btr/btr0pcur.c index 97fe06f0f5e..be1a6cbd8ee 100644 --- a/storage/xtradb/btr/btr0pcur.c +++ b/storage/xtradb/btr/btr0pcur.c @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1996, 2011, Oracle and/or its affiliates. All Rights Reserved. +Copyright (c) 1996, 2012, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -127,6 +127,8 @@ btr_pcur_store_position( ut_a(btr_page_get_next(page, mtr) == FIL_NULL); ut_a(btr_page_get_prev(page, mtr) == FIL_NULL); + ut_ad(page_is_leaf(page)); + ut_ad(page_get_page_no(page) == index->page); cursor->old_stored = BTR_PCUR_OLD_STORED; @@ -253,6 +255,8 @@ btr_pcur_restore_position_func( cursor->rel_pos == BTR_PCUR_BEFORE_FIRST_IN_TREE, index, latch_mode, btr_pcur_get_btr_cur(cursor), mtr); + cursor->latch_mode = latch_mode; + cursor->pos_state = BTR_PCUR_IS_POSITIONED; cursor->block_when_stored = btr_pcur_get_block(cursor); return(FALSE); @@ -272,8 +276,10 @@ btr_pcur_restore_position_func( file, line, mtr))) { cursor->pos_state = BTR_PCUR_IS_POSITIONED; - buf_block_dbg_add_level(btr_pcur_get_block(cursor), - SYNC_TREE_NODE); + buf_block_dbg_add_level( + btr_pcur_get_block(cursor), + dict_index_is_ibuf(index) + ? SYNC_IBUF_TREE_NODE : SYNC_TREE_NODE); if (cursor->rel_pos == BTR_PCUR_ON) { #ifdef UNIV_DEBUG @@ -315,13 +321,19 @@ btr_pcur_restore_position_func( /* Save the old search mode of the cursor */ old_mode = cursor->search_mode; - if (UNIV_LIKELY(cursor->rel_pos == BTR_PCUR_ON)) { + switch (cursor->rel_pos) { + case BTR_PCUR_ON: mode = PAGE_CUR_LE; - } else if (cursor->rel_pos == BTR_PCUR_AFTER) { + break; + case BTR_PCUR_AFTER: mode = PAGE_CUR_G; - } else { - ut_ad(cursor->rel_pos == BTR_PCUR_BEFORE); + break; + case BTR_PCUR_BEFORE: mode = PAGE_CUR_L; + break; + default: + ut_error; + mode = 0; } btr_pcur_open_with_no_init_func(index, tuple, mode, latch_mode, @@ -330,25 +342,44 @@ btr_pcur_restore_position_func( /* Restore the old search mode */ cursor->search_mode = old_mode; - if (cursor->rel_pos == BTR_PCUR_ON - && btr_pcur_is_on_user_rec(cursor) - && 0 == cmp_dtuple_rec(tuple, btr_pcur_get_rec(cursor), - rec_get_offsets( - btr_pcur_get_rec(cursor), index, - NULL, ULINT_UNDEFINED, &heap))) { + if (btr_pcur_is_on_user_rec(cursor)) { + switch (cursor->rel_pos) { + case BTR_PCUR_ON: + if (!cmp_dtuple_rec( + tuple, btr_pcur_get_rec(cursor), + rec_get_offsets(btr_pcur_get_rec(cursor), + index, NULL, + ULINT_UNDEFINED, &heap))) { - /* We have to store the NEW value for the modify clock, since - the cursor can now be on a different page! But we can retain - the value of old_rec */ + /* We have to store the NEW value for + the modify clock, since the cursor can + now be on a different page! But we can + retain the value of old_rec */ - cursor->block_when_stored = btr_pcur_get_block(cursor); - cursor->modify_clock = buf_block_get_modify_clock( - cursor->block_when_stored); - cursor->old_stored = BTR_PCUR_OLD_STORED; + cursor->block_when_stored = + btr_pcur_get_block(cursor); + cursor->modify_clock = + buf_block_get_modify_clock( + cursor->block_when_stored); + cursor->old_stored = BTR_PCUR_OLD_STORED; - mem_heap_free(heap); + mem_heap_free(heap); - return(TRUE); + return(TRUE); + } + + break; + case BTR_PCUR_BEFORE: + page_cur_move_to_next(btr_pcur_get_page_cur(cursor)); + break; + case BTR_PCUR_AFTER: + page_cur_move_to_prev(btr_pcur_get_page_cur(cursor)); + break; +#ifdef UNIV_DEBUG + default: + ut_error; +#endif /* UNIV_DEBUG */ + } } mem_heap_free(heap); @@ -396,7 +427,8 @@ btr_pcur_move_to_next_page( ut_ad(next_page_no != FIL_NULL); next_block = btr_block_get(space, zip_size, next_page_no, - cursor->latch_mode, mtr); + cursor->latch_mode, + btr_pcur_get_btr_cur(cursor)->index, mtr); next_page = buf_block_get_frame(next_block); if (srv_pass_corrupt_table && !next_page) { diff --git a/storage/xtradb/btr/btr0sea.c b/storage/xtradb/btr/btr0sea.c index 6e6c533f4af..3d710b653c0 100644 --- a/storage/xtradb/btr/btr0sea.c +++ b/storage/xtradb/btr/btr0sea.c @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1996, 2009, Innobase Oy. All Rights Reserved. +Copyright (c) 1996, 2011, Oracle and/or its affiliates. All Rights Reserved. Copyright (c) 2008, Google Inc. Portions of this file contain modifications contributed and copyrighted by @@ -44,12 +44,8 @@ Created 2/17/1996 Heikki Tuuri #include "ha0ha.h" #include "srv0srv.h" /** Flag: has the search system been enabled? -Protected by btr_search_latch and btr_search_enabled_mutex. */ +Protected by btr_search_latch. */ UNIV_INTERN char btr_search_enabled = TRUE; -UNIV_INTERN ibool btr_search_fully_disabled = FALSE; - -/** Mutex protecting btr_search_enabled */ -static mutex_t btr_search_enabled_mutex; /** A dummy variable to fool the compiler */ UNIV_INTERN ulint btr_search_this_is_zero = 0; @@ -169,7 +165,6 @@ btr_search_sys_create( btr_search_latch_temp = mem_alloc(sizeof(rw_lock_t)); rw_lock_create(&btr_search_latch, SYNC_SEARCH_SYS); - mutex_create(&btr_search_enabled_mutex, SYNC_SEARCH_SYS_CONF); btr_search_sys = mem_alloc(sizeof(btr_search_sys_t)); @@ -199,27 +194,37 @@ void btr_search_disable(void) /*====================*/ { - mutex_enter(&btr_search_enabled_mutex); + dict_table_t* table; + + mutex_enter(&dict_sys->mutex); rw_lock_x_lock(&btr_search_latch); - /* Disable access to hash index, also tell ha_insert_for_fold() - stop adding new nodes to hash index, but still allow updating - existing nodes */ btr_search_enabled = FALSE; - /* Clear all block->is_hashed flags and remove all entries - from btr_search_sys->hash_index. */ - buf_pool_drop_hash_index(); + /* Clear the index->search_info->ref_count of every index in + the data dictionary cache. */ + for (table = UT_LIST_GET_FIRST(dict_sys->table_LRU); table; + table = UT_LIST_GET_NEXT(table_LRU, table)) { - /* hash index has been cleaned up, disallow any operation to - the hash index */ - btr_search_fully_disabled = TRUE; + dict_index_t* index; - /* btr_search_enabled_mutex should guarantee this. */ - ut_ad(!btr_search_enabled); + for (index = dict_table_get_first_index(table); index; + index = dict_table_get_next_index(index)) { + + index->search_info->ref_count = 0; + } + } + + mutex_exit(&dict_sys->mutex); + + /* Set all block->index = NULL. */ + buf_pool_clear_hash_index(); + + /* Clear the adaptive hash index. */ + hash_table_clear(btr_search_sys->hash_index); + mem_heap_empty(btr_search_sys->hash_index->heap); rw_lock_x_unlock(&btr_search_latch); - mutex_exit(&btr_search_enabled_mutex); } /********************************************************************//** @@ -229,14 +234,11 @@ void btr_search_enable(void) /*====================*/ { - mutex_enter(&btr_search_enabled_mutex); rw_lock_x_lock(&btr_search_latch); btr_search_enabled = TRUE; - btr_search_fully_disabled = FALSE; rw_lock_x_unlock(&btr_search_latch); - mutex_exit(&btr_search_enabled_mutex); } /*****************************************************************//** @@ -459,7 +461,7 @@ btr_search_update_block_hash_info( && (block->n_bytes == info->n_bytes) && (block->left_side == info->left_side)) { - if ((block->is_hashed) + if ((block->index) && (block->curr_n_fields == info->n_fields) && (block->curr_n_bytes == info->n_bytes) && (block->curr_left_side == info->left_side)) { @@ -488,7 +490,7 @@ btr_search_update_block_hash_info( / BTR_SEARCH_PAGE_BUILD_LIMIT) && (info->n_hash_potential >= BTR_SEARCH_BUILD_LIMIT)) { - if ((!block->is_hashed) + if ((!block->index) || (block->n_hash_helps > 2 * page_get_n_recs(block->frame)) || (block->n_fields != block->curr_n_fields) @@ -520,9 +522,9 @@ btr_search_update_hash_ref( buf_block_t* block, /*!< in: buffer block where cursor positioned */ btr_cur_t* cursor) /*!< in: cursor */ { - ulint fold; - rec_t* rec; - dulint index_id; + dict_index_t* index; + ulint fold; + const rec_t* rec; ut_ad(cursor->flag == BTR_CUR_HASH_FAIL); #ifdef UNIV_SYNC_DEBUG @@ -533,13 +535,15 @@ btr_search_update_hash_ref( ut_ad(page_align(btr_cur_get_rec(cursor)) == buf_block_get_frame(block)); - if (!block->is_hashed) { + index = block->index; + + if (!index) { return; } - ut_a(block->index == cursor->index); - ut_a(!dict_index_is_ibuf(cursor->index)); + ut_a(index == cursor->index); + ut_a(!dict_index_is_ibuf(index)); if ((info->n_hash_potential > 0) && (block->curr_n_fields == info->n_fields) @@ -556,12 +560,11 @@ btr_search_update_hash_ref( return; } - index_id = cursor->index->id; fold = rec_fold(rec, - rec_get_offsets(rec, cursor->index, offsets_, + rec_get_offsets(rec, index, offsets_, ULINT_UNDEFINED, &heap), block->curr_n_fields, - block->curr_n_bytes, index_id); + block->curr_n_bytes, index->id); if (UNIV_LIKELY_NULL(heap)) { mem_heap_free(heap); } @@ -829,7 +832,7 @@ btr_search_guess_on_hash( mtr_t* mtr) /*!< in: mtr */ { buf_block_t* block; - rec_t* rec; + const rec_t* rec; ulint fold; dulint index_id; #ifdef notdefined @@ -837,6 +840,7 @@ btr_search_guess_on_hash( btr_pcur_t pcur; #endif ut_ad(index && info && tuple && cursor && mtr); + ut_ad(!dict_index_is_ibuf(index)); ut_ad((latch_mode == BTR_SEARCH_LEAF) || (latch_mode == BTR_MODIFY_LEAF)); @@ -914,7 +918,7 @@ btr_search_guess_on_hash( ut_ad(page_rec_is_user_rec(rec)); - btr_cur_position(index, rec, block, cursor); + btr_cur_position(index, (rec_t*) rec, block, cursor); /* Check the validity of the guess within the page */ @@ -1045,15 +1049,16 @@ btr_search_drop_page_hash_index( retry: rw_lock_s_lock(&btr_search_latch); - page = block->frame; + index = block->index; - if (UNIV_LIKELY(!block->is_hashed)) { + if (UNIV_LIKELY(!index)) { rw_lock_s_unlock(&btr_search_latch); return; } + ut_a(!dict_index_is_ibuf(index)); table = btr_search_sys->hash_index; #ifdef UNIV_SYNC_DEBUG @@ -1064,8 +1069,6 @@ retry: n_fields = block->curr_n_fields; n_bytes = block->curr_n_bytes; - index = block->index; - ut_a(!dict_index_is_ibuf(index)); /* NOTE: The fields of block must not be accessed after releasing btr_search_latch, as the index page might only @@ -1075,6 +1078,7 @@ retry: ut_a(n_fields + n_bytes > 0); + page = block->frame; n_recs = page_get_n_recs(page); /* Calculate and cache fold values into an array for fast deletion @@ -1123,7 +1127,7 @@ next_rec: rw_lock_x_lock(&btr_search_latch); - if (UNIV_UNLIKELY(!block->is_hashed)) { + if (UNIV_UNLIKELY(!block->index)) { /* Someone else has meanwhile dropped the hash index */ goto cleanup; @@ -1151,9 +1155,8 @@ next_rec: ut_a(index->search_info->ref_count > 0); index->search_info->ref_count--; - block->is_hashed = FALSE; block->index = NULL; - + cleanup: #if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG if (UNIV_UNLIKELY(block->n_pointers)) { @@ -1223,7 +1226,7 @@ retry: if (buf_block_get_state(block) != BUF_BLOCK_FILE_PAGE || block->index != index - || !block->is_hashed) { + || !(block->index != NULL)) { continue; } @@ -1289,7 +1292,7 @@ next_rec: rw_lock_x_lock(&btr_search_latch); - if (UNIV_UNLIKELY(!block->is_hashed)) { + if (UNIV_UNLIKELY(!(block->index != NULL))) { goto cleanup; } @@ -1314,7 +1317,6 @@ next_rec: ut_a(index->search_info->ref_count > 0); index->search_info->ref_count--; - block->is_hashed = FALSE; block->index = NULL; cleanup: @@ -1346,8 +1348,8 @@ cleanup: } /********************************************************************//** -Drops a page hash index when a page is freed from a fseg to the file system. -Drops possible hash index if the page happens to be in the buffer pool. */ +Drops a possible page hash index when a page is evicted from the buffer pool +or freed in a file segment. */ UNIV_INTERN void btr_search_drop_page_hash_when_freed( @@ -1360,28 +1362,19 @@ btr_search_drop_page_hash_when_freed( buf_block_t* block; mtr_t mtr; - if (!buf_page_peek_if_search_hashed(space, page_no)) { - - return; - } - mtr_start(&mtr); - /* We assume that if the caller has a latch on the page, then the - caller has already dropped the hash index for the page, and we never - get here. Therefore we can acquire the s-latch to the page without - having to fear a deadlock. */ + /* If the caller has a latch on the page, then the caller must + have a x-latch on the page and it must have already dropped + the hash index for the page. Because of the x-latch that we + are possibly holding, we cannot s-latch the page, but must + (recursively) x-latch it, even though we are only reading. */ - block = buf_page_get_gen(space, zip_size, page_no, RW_S_LATCH, NULL, + block = buf_page_get_gen(space, zip_size, page_no, RW_X_LATCH, NULL, BUF_PEEK_IF_IN_POOL, __FILE__, __LINE__, &mtr); - /* Because the buffer pool mutex was released by - buf_page_peek_if_search_hashed(), it is possible that the - block was removed from the buffer pool by another thread - before buf_page_get_gen() got a chance to acquire the buffer - pool mutex again. Thus, we must check for a NULL return. */ - if (UNIV_LIKELY(block != NULL)) { + if (block && block->index) { buf_block_dbg_add_level(block, SYNC_TREE_NODE_FROM_HASH); @@ -1413,7 +1406,6 @@ btr_search_build_page_hash_index( rec_t* next_rec; ulint fold; ulint next_fold; - dulint index_id; ulint n_cached; ulint n_recs; ulint* folds; @@ -1427,9 +1419,6 @@ btr_search_build_page_hash_index( ut_ad(index); ut_a(!dict_index_is_ibuf(index)); - table = btr_search_sys->hash_index; - page = buf_block_get_frame(block); - #ifdef UNIV_SYNC_DEBUG ut_ad(!rw_lock_own(&btr_search_latch, RW_LOCK_EX)); ut_ad(rw_lock_own(&(block->lock), RW_LOCK_SHARED) @@ -1438,9 +1427,17 @@ btr_search_build_page_hash_index( rw_lock_s_lock(&btr_search_latch); - if (block->is_hashed && ((block->curr_n_fields != n_fields) - || (block->curr_n_bytes != n_bytes) - || (block->curr_left_side != left_side))) { + if (!btr_search_enabled) { + rw_lock_s_unlock(&btr_search_latch); + return; + } + + table = btr_search_sys->hash_index; + page = buf_block_get_frame(block); + + if (block->index && ((block->curr_n_fields != n_fields) + || (block->curr_n_bytes != n_bytes) + || (block->curr_left_side != left_side))) { rw_lock_s_unlock(&btr_search_latch); @@ -1477,7 +1474,7 @@ btr_search_build_page_hash_index( n_cached = 0; - index_id = btr_page_get_index_id(page); + ut_a(UT_DULINT_EQ(index->id, btr_page_get_index_id(page))); rec = page_rec_get_next(page_get_infimum_rec(page)); @@ -1492,7 +1489,7 @@ btr_search_build_page_hash_index( } } - fold = rec_fold(rec, offsets, n_fields, n_bytes, index_id); + fold = rec_fold(rec, offsets, n_fields, n_bytes, index->id); if (left_side) { @@ -1519,7 +1516,7 @@ btr_search_build_page_hash_index( offsets = rec_get_offsets(next_rec, index, offsets, n_fields + (n_bytes > 0), &heap); next_fold = rec_fold(next_rec, offsets, n_fields, - n_bytes, index_id); + n_bytes, index->id); if (fold != next_fold) { /* Insert an entry into the hash index */ @@ -1544,13 +1541,13 @@ btr_search_build_page_hash_index( rw_lock_x_lock(&btr_search_latch); - if (UNIV_UNLIKELY(btr_search_fully_disabled)) { + if (UNIV_UNLIKELY(!btr_search_enabled)) { goto exit_func; } - if (block->is_hashed && ((block->curr_n_fields != n_fields) - || (block->curr_n_bytes != n_bytes) - || (block->curr_left_side != left_side))) { + if (block->index && ((block->curr_n_fields != n_fields) + || (block->curr_n_bytes != n_bytes) + || (block->curr_left_side != left_side))) { goto exit_func; } @@ -1559,11 +1556,10 @@ btr_search_build_page_hash_index( rebuild hash index for a page that is already hashed, we have to take care not to increment the counter in that case. */ - if (!block->is_hashed) { + if (!block->index) { index->search_info->ref_count++; } - block->is_hashed = TRUE; block->n_hash_helps = 0; block->curr_n_fields = n_fields; @@ -1611,14 +1607,15 @@ btr_search_move_or_delete_hash_entries( ut_ad(rw_lock_own(&(block->lock), RW_LOCK_EX)); ut_ad(rw_lock_own(&(new_block->lock), RW_LOCK_EX)); #endif /* UNIV_SYNC_DEBUG */ - ut_a(!new_block->is_hashed || new_block->index == index); - ut_a(!block->is_hashed || block->index == index); - ut_a(!(new_block->is_hashed || block->is_hashed) - || !dict_index_is_ibuf(index)); rw_lock_s_lock(&btr_search_latch); - if (new_block->is_hashed) { + ut_a(!new_block->index || new_block->index == index); + ut_a(!block->index || block->index == index); + ut_a(!(new_block->index || block->index) + || !dict_index_is_ibuf(index)); + + if (new_block->index) { rw_lock_s_unlock(&btr_search_latch); @@ -1627,7 +1624,7 @@ btr_search_move_or_delete_hash_entries( return; } - if (block->is_hashed) { + if (block->index) { n_fields = block->curr_n_fields; n_bytes = block->curr_n_bytes; @@ -1664,42 +1661,48 @@ btr_search_update_hash_on_delete( { hash_table_t* table; buf_block_t* block; - rec_t* rec; + const rec_t* rec; ulint fold; - dulint index_id; + dict_index_t* index; ulint offsets_[REC_OFFS_NORMAL_SIZE]; mem_heap_t* heap = NULL; rec_offs_init(offsets_); - rec = btr_cur_get_rec(cursor); - block = btr_cur_get_block(cursor); #ifdef UNIV_SYNC_DEBUG ut_ad(rw_lock_own(&(block->lock), RW_LOCK_EX)); #endif /* UNIV_SYNC_DEBUG */ - if (!block->is_hashed) { + index = block->index; + + if (!index) { return; } - ut_a(block->index == cursor->index); + ut_a(index == cursor->index); ut_a(block->curr_n_fields + block->curr_n_bytes > 0); - ut_a(!dict_index_is_ibuf(cursor->index)); + ut_a(!dict_index_is_ibuf(index)); table = btr_search_sys->hash_index; - index_id = cursor->index->id; - fold = rec_fold(rec, rec_get_offsets(rec, cursor->index, offsets_, + rec = btr_cur_get_rec(cursor); + + fold = rec_fold(rec, rec_get_offsets(rec, index, offsets_, ULINT_UNDEFINED, &heap), - block->curr_n_fields, block->curr_n_bytes, index_id); + block->curr_n_fields, block->curr_n_bytes, index->id); if (UNIV_LIKELY_NULL(heap)) { mem_heap_free(heap); } + rw_lock_x_lock(&btr_search_latch); - ha_search_and_delete_if_found(table, fold, rec); + if (block->index) { + ut_a(block->index == index); + + ha_search_and_delete_if_found(table, fold, rec); + } rw_lock_x_unlock(&btr_search_latch); } @@ -1717,6 +1720,7 @@ btr_search_update_hash_node_on_insert( { hash_table_t* table; buf_block_t* block; + dict_index_t* index; rec_t* rec; rec = btr_cur_get_rec(cursor); @@ -1727,16 +1731,25 @@ btr_search_update_hash_node_on_insert( ut_ad(rw_lock_own(&(block->lock), RW_LOCK_EX)); #endif /* UNIV_SYNC_DEBUG */ - if (!block->is_hashed) { + index = block->index; + + if (!index) { return; } - ut_a(block->index == cursor->index); - ut_a(!dict_index_is_ibuf(cursor->index)); + ut_a(cursor->index == index); + ut_a(!dict_index_is_ibuf(index)); rw_lock_x_lock(&btr_search_latch); + if (!block->index) { + + goto func_exit; + } + + ut_a(block->index == index); + if ((cursor->flag == BTR_CUR_HASH) && (cursor->n_fields == block->curr_n_fields) && (cursor->n_bytes == block->curr_n_bytes) @@ -1747,6 +1760,7 @@ btr_search_update_hash_node_on_insert( ha_search_and_update_if_found(table, cursor->fold, rec, block, page_rec_get_next(rec)); +func_exit: rw_lock_x_unlock(&btr_search_latch); } else { rw_lock_x_unlock(&btr_search_latch); @@ -1768,10 +1782,10 @@ btr_search_update_hash_on_insert( { hash_table_t* table; buf_block_t* block; + dict_index_t* index; rec_t* rec; rec_t* ins_rec; rec_t* next_rec; - dulint index_id; ulint fold; ulint ins_fold; ulint next_fold = 0; /* remove warning (??? bug ???) */ @@ -1796,15 +1810,15 @@ btr_search_update_hash_on_insert( ut_ad(rw_lock_own(&(block->lock), RW_LOCK_EX)); #endif /* UNIV_SYNC_DEBUG */ - if (!block->is_hashed) { + index = block->index; + + if (!index) { return; } - ut_a(block->index == cursor->index); - ut_a(!dict_index_is_ibuf(cursor->index)); - - index_id = cursor->index->id; + ut_a(index == cursor->index); + ut_a(!dict_index_is_ibuf(index)); n_fields = block->curr_n_fields; n_bytes = block->curr_n_bytes; @@ -1813,21 +1827,21 @@ btr_search_update_hash_on_insert( ins_rec = page_rec_get_next(rec); next_rec = page_rec_get_next(ins_rec); - offsets = rec_get_offsets(ins_rec, cursor->index, offsets, + offsets = rec_get_offsets(ins_rec, index, offsets, ULINT_UNDEFINED, &heap); - ins_fold = rec_fold(ins_rec, offsets, n_fields, n_bytes, index_id); + ins_fold = rec_fold(ins_rec, offsets, n_fields, n_bytes, index->id); if (!page_rec_is_supremum(next_rec)) { - offsets = rec_get_offsets(next_rec, cursor->index, offsets, + offsets = rec_get_offsets(next_rec, index, offsets, n_fields + (n_bytes > 0), &heap); next_fold = rec_fold(next_rec, offsets, n_fields, - n_bytes, index_id); + n_bytes, index->id); } if (!page_rec_is_infimum(rec)) { - offsets = rec_get_offsets(rec, cursor->index, offsets, + offsets = rec_get_offsets(rec, index, offsets, n_fields + (n_bytes > 0), &heap); - fold = rec_fold(rec, offsets, n_fields, n_bytes, index_id); + fold = rec_fold(rec, offsets, n_fields, n_bytes, index->id); } else { if (left_side) { @@ -1835,6 +1849,10 @@ btr_search_update_hash_on_insert( locked = TRUE; + if (!btr_search_enabled) { + goto function_exit; + } + ha_insert_for_fold(table, ins_fold, block, ins_rec); } @@ -1848,6 +1866,10 @@ btr_search_update_hash_on_insert( rw_lock_x_lock(&btr_search_latch); locked = TRUE; + + if (!btr_search_enabled) { + goto function_exit; + } } if (!left_side) { @@ -1866,6 +1888,10 @@ check_next_rec: rw_lock_x_lock(&btr_search_latch); locked = TRUE; + + if (!btr_search_enabled) { + goto function_exit; + } } ha_insert_for_fold(table, ins_fold, block, ins_rec); @@ -1881,6 +1907,10 @@ check_next_rec: rw_lock_x_lock(&btr_search_latch); locked = TRUE; + + if (!btr_search_enabled) { + goto function_exit; + } } if (!left_side) { @@ -1888,7 +1918,7 @@ check_next_rec: ha_insert_for_fold(table, ins_fold, block, ins_rec); /* fputs("Hash insert for ", stderr); - dict_index_name_print(stderr, cursor->index); + dict_index_name_print(stderr, index); fprintf(stderr, " fold %lu\n", ins_fold); */ } else { @@ -1995,7 +2025,7 @@ btr_search_validate(void) + (block->curr_n_bytes > 0), &heap); - if (!block->is_hashed || node->fold + if (!block->index || node->fold != rec_fold((rec_t*)(node->data), offsets, block->curr_n_fields, @@ -2030,10 +2060,10 @@ btr_search_validate(void) rec_print_new(stderr, (rec_t*)node->data, offsets); fprintf(stderr, "\nInnoDB: on that page." - " Page mem address %p, is hashed %lu," + " Page mem address %p, is hashed %p," " n fields %lu, n bytes %lu\n" "InnoDB: side %lu\n", - (void*) page, (ulong) block->is_hashed, + (void*) page, (void*) block->index, (ulong) block->curr_n_fields, (ulong) block->curr_n_bytes, (ulong) block->curr_left_side); diff --git a/storage/xtradb/buf/buf0buddy.c b/storage/xtradb/buf/buf0buddy.c index 673d6c55efc..71d897d367c 100644 --- a/storage/xtradb/buf/buf0buddy.c +++ b/storage/xtradb/buf/buf0buddy.c @@ -354,7 +354,6 @@ buf_buddy_relocate( { buf_page_t* bpage; const ulint size = BUF_BUDDY_LOW << i; - ullint usec = ut_time_us(NULL); mutex_t* mutex; ulint space; ulint page_no; @@ -442,6 +441,7 @@ buf_buddy_relocate( if (mutex && buf_page_can_relocate(bpage)) { /* Relocate the compressed page. */ + ullint usec = ut_time_us(NULL); ut_a(bpage->zip.data == src); memcpy(dst, src, size); bpage->zip.data = dst; diff --git a/storage/xtradb/buf/buf0buf.c b/storage/xtradb/buf/buf0buf.c index c76973a42ef..6998f1b53ac 100644 --- a/storage/xtradb/buf/buf0buf.c +++ b/storage/xtradb/buf/buf0buf.c @@ -57,7 +57,9 @@ Created 11/5/1995 Heikki Tuuri /* prototypes for new functions added to ha_innodb.cc */ trx_t* innobase_get_trx(); -inline void _increment_page_get_statistics(buf_block_t* block, trx_t* trx) +static inline +void +_increment_page_get_statistics(buf_block_t* block, trx_t* trx) { ulint block_hash; ulint block_hash_byte; @@ -829,11 +831,8 @@ buf_chunk_init( for (i = chunk->size; i--; ) { buf_block_init(block, frame); + UNIV_MEM_INVALID(block->frame, UNIV_PAGE_SIZE); -#ifdef HAVE_valgrind - /* Wipe contents of frame to eliminate a Purify warning */ - memset(block->frame, '\0', UNIV_PAGE_SIZE); -#endif /* Add the block to the free list */ mutex_enter(&free_list_mutex); UT_LIST_ADD_LAST(free, buf_pool->free, (&block->page)); @@ -1043,6 +1042,24 @@ buf_pool_free(void) { buf_chunk_t* chunk; buf_chunk_t* chunks; + buf_page_t* bpage; + + bpage = UT_LIST_GET_LAST(buf_pool->LRU); + while (bpage != NULL) { + buf_page_t* prev_bpage = UT_LIST_GET_PREV(LRU, bpage); + enum buf_page_state state = buf_page_get_state(bpage); + + ut_ad(buf_page_in_file(bpage)); + ut_ad(bpage->in_LRU_list); + + if (state != BUF_BLOCK_FILE_PAGE) { + /* We must not have any dirty block. */ + ut_ad(state == BUF_BLOCK_ZIP_PAGE); + buf_page_free_descriptor(bpage); + } + + bpage = prev_bpage; + } chunks = buf_pool->chunks; chunk = chunks + buf_pool->n_chunks; @@ -1059,86 +1076,42 @@ buf_pool_free(void) } /********************************************************************//** -Drops the adaptive hash index. To prevent a livelock, this function -is only to be called while holding btr_search_latch and while -btr_search_enabled == FALSE. */ +Clears the adaptive hash index on all pages in the buffer pool. */ UNIV_INTERN void -buf_pool_drop_hash_index(void) -/*==========================*/ +buf_pool_clear_hash_index(void) +/*===========================*/ { - ibool released_search_latch; + buf_chunk_t* chunks = buf_pool->chunks; + buf_chunk_t* chunk = chunks + buf_pool->n_chunks; #ifdef UNIV_SYNC_DEBUG ut_ad(rw_lock_own(&btr_search_latch, RW_LOCK_EX)); #endif /* UNIV_SYNC_DEBUG */ ut_ad(!btr_search_enabled); - do { - buf_chunk_t* chunks = buf_pool->chunks; - buf_chunk_t* chunk = chunks + buf_pool->n_chunks; + while (--chunk >= chunks) { + buf_block_t* block = chunk->blocks; + ulint i = chunk->size; - released_search_latch = FALSE; + for (; i--; block++) { + dict_index_t* index = block->index; - while (--chunk >= chunks) { - buf_block_t* block = chunk->blocks; - ulint i = chunk->size; + /* We can set block->index = NULL + when we have an x-latch on btr_search_latch; + see the comment in buf0buf.h */ - for (; i--; block++) { - /* block->is_hashed cannot be modified - when we have an x-latch on btr_search_latch; - see the comment in buf0buf.h */ - - if (buf_block_get_state(block) - != BUF_BLOCK_FILE_PAGE - || !block->is_hashed) { - continue; - } - - /* To follow the latching order, we - have to release btr_search_latch - before acquiring block->latch. */ - rw_lock_x_unlock(&btr_search_latch); - /* When we release the search latch, - we must rescan all blocks, because - some may become hashed again. */ - released_search_latch = TRUE; - - rw_lock_x_lock(&block->lock); - - /* This should be guaranteed by the - callers, which will be holding - btr_search_enabled_mutex. */ - ut_ad(!btr_search_enabled); - - /* Because we did not buffer-fix the - block by calling buf_block_get_gen(), - it is possible that the block has been - allocated for some other use after - btr_search_latch was released above. - We do not care which file page the - block is mapped to. All we want to do - is to drop any hash entries referring - to the page. */ - - /* It is possible that - block->page.state != BUF_FILE_PAGE. - Even that does not matter, because - btr_search_drop_page_hash_index() will - check block->is_hashed before doing - anything. block->is_hashed can only - be set on uncompressed file pages. */ - - btr_search_drop_page_hash_index(block); - - rw_lock_x_unlock(&block->lock); - - rw_lock_x_lock(&btr_search_latch); - - ut_ad(!btr_search_enabled); + if (!index) { + /* Not hashed */ + continue; } + + block->index = NULL; +# if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG + block->n_pointers = 0; +# endif /* UNIV_AHI_DEBUG || UNIV_DEBUG */ } - } while (released_search_latch); + } } /********************************************************************//** @@ -1283,63 +1256,6 @@ buf_page_set_accessed_make_young( } } -/********************************************************************//** -Resets the check_index_page_at_flush field of a page if found in the buffer -pool. */ -UNIV_INTERN -void -buf_reset_check_index_page_at_flush( -/*================================*/ - ulint space, /*!< in: space id */ - ulint offset) /*!< in: page number */ -{ - buf_block_t* block; - - //buf_pool_mutex_enter(); - rw_lock_s_lock(&page_hash_latch); - - block = (buf_block_t*) buf_page_hash_get(space, offset); - - if (block && buf_block_get_state(block) == BUF_BLOCK_FILE_PAGE) { - block->check_index_page_at_flush = FALSE; - } - - //buf_pool_mutex_exit(); - rw_lock_s_unlock(&page_hash_latch); -} - -/********************************************************************//** -Returns the current state of is_hashed of a page. FALSE if the page is -not in the pool. NOTE that this operation does not fix the page in the -pool if it is found there. -@return TRUE if page hash index is built in search system */ -UNIV_INTERN -ibool -buf_page_peek_if_search_hashed( -/*===========================*/ - ulint space, /*!< in: space id */ - ulint offset) /*!< in: page number */ -{ - buf_block_t* block; - ibool is_hashed; - - //buf_pool_mutex_enter(); - rw_lock_s_lock(&page_hash_latch); - - block = (buf_block_t*) buf_page_hash_get(space, offset); - - if (!block || buf_block_get_state(block) != BUF_BLOCK_FILE_PAGE) { - is_hashed = FALSE; - } else { - is_hashed = block->is_hashed; - } - - //buf_pool_mutex_exit(); - rw_lock_s_unlock(&page_hash_latch); - - return(is_hashed); -} - #if defined UNIV_DEBUG_FILE_ACCESSES || defined UNIV_DEBUG /********************************************************************//** Sets file_page_was_freed TRUE if the page is found in the buffer pool. @@ -1623,7 +1539,6 @@ buf_block_init_low( block->index = NULL; block->n_hash_helps = 0; - block->is_hashed = FALSE; block->n_fields = 1; block->n_bytes = 0; block->left_side = TRUE; @@ -2540,7 +2455,7 @@ buf_page_get_known_nowait( ut_a(buf_block_get_state(block) == BUF_BLOCK_FILE_PAGE); #endif /* UNIV_DEBUG || UNIV_BUF_DEBUG */ #if defined UNIV_DEBUG_FILE_ACCESSES || defined UNIV_DEBUG - ut_a(block->page.file_page_was_freed == FALSE); + ut_a(mode == BUF_KEEP_OLD || !block->page.file_page_was_freed); #endif #ifdef UNIV_IBUF_COUNT_DEBUG @@ -3312,14 +3227,8 @@ corrupt: } } - //enum buf_flush flush_type; - //buf_pool_mutex_enter(); if (io_type == BUF_IO_WRITE) { - //flush_type = buf_page_get_flush_type(bpage); - /* to keep consistency at buf_LRU_insert_zip_clean() */ - //if (flush_type == BUF_FLUSH_LRU) { /* optimistic! */ - mutex_enter(&LRU_list_mutex); - //} + mutex_enter(&LRU_list_mutex); } block_mutex = buf_page_get_mutex_enter(bpage); ut_a(block_mutex); diff --git a/storage/xtradb/buf/buf0lru.c b/storage/xtradb/buf/buf0lru.c index df74ccf500f..c53b71632c2 100644 --- a/storage/xtradb/buf/buf0lru.c +++ b/storage/xtradb/buf/buf0lru.c @@ -292,7 +292,7 @@ next_page: //mutex_enter(&((buf_block_t*) bpage)->mutex); is_fixed = bpage->buf_fix_count > 0 - || !((buf_block_t*) bpage)->is_hashed; + || !((buf_block_t*) bpage)->index; //mutex_exit(&((buf_block_t*) bpage)->mutex); if (is_fixed) { @@ -451,7 +451,7 @@ scan_again: if (buf_page_get_state(bpage) != BUF_BLOCK_FILE_PAGE) { /* This is a compressed-only block descriptor. Do nothing. */ - } else if (((buf_block_t*) bpage)->is_hashed) { + } else if (((buf_block_t*) bpage)->index) { ulint page_no; ulint zip_size; @@ -465,7 +465,7 @@ scan_again: mutex_exit(block_mutex); /* Note that the following call will acquire - an S-latch on the page */ + and release an X-latch on the page. */ btr_search_drop_page_hash_when_freed( id, zip_size, page_no); @@ -537,7 +537,7 @@ buf_LRU_mark_space_was_deleted( for (j = chunk->size; j--; block++) { if (buf_block_get_state(block) != BUF_BLOCK_FILE_PAGE - || !block->is_hashed + || !(block->index != NULL) || buf_page_get_space(&block->page) != id) { continue; } diff --git a/storage/xtradb/compile-innodb b/storage/xtradb/compile-innodb new file mode 100644 index 00000000000..82601f03ae9 --- /dev/null +++ b/storage/xtradb/compile-innodb @@ -0,0 +1,24 @@ +#! /bin/sh +# +# Copyright (c) 2006, 2009, Innobase Oy. All Rights Reserved. +# +# This program is free software; you can redistribute it and/or modify it under +# the terms of the GNU General Public License as published by the Free Software +# Foundation; version 2 of the License. +# +# This program is distributed in the hope that it will be useful, but WITHOUT +# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS +# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License along with +# this program; if not, write to the Free Software Foundation, Inc., 59 Temple +# Place, Suite 330, Boston, MA 02111-1307 USA +# + +path=`dirname $0` +. "$path/SETUP.sh" + +extra_flags="$pentium_cflags $fast_cflags -g" +extra_configs="$pentium_configs $static_link --with-plugins=innobase" + +. "$path/FINISH.sh" diff --git a/storage/xtradb/compile-innodb-debug b/storage/xtradb/compile-innodb-debug new file mode 100644 index 00000000000..efb4abf88d5 --- /dev/null +++ b/storage/xtradb/compile-innodb-debug @@ -0,0 +1,24 @@ +#! /bin/sh +# +# Copyright (c) 2005, 2009, Innobase Oy. All Rights Reserved. +# +# This program is free software; you can redistribute it and/or modify it under +# the terms of the GNU General Public License as published by the Free Software +# Foundation; version 2 of the License. +# +# This program is distributed in the hope that it will be useful, but WITHOUT +# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS +# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License along with +# this program; if not, write to the Free Software Foundation, Inc., 59 Temple +# Place, Suite 330, Boston, MA 02111-1307 USA +# + +path=`dirname $0` +. "$path/SETUP.sh" $@ --with-debug=full + +extra_flags="$pentium_cflags $debug_cflags" +extra_configs="$pentium_configs $debug_configs --with-plugins=innobase" + +. "$path/FINISH.sh" diff --git a/storage/xtradb/dict/dict0crea.c b/storage/xtradb/dict/dict0crea.c index c6e7d588e72..a913d4f0840 100644 --- a/storage/xtradb/dict/dict0crea.c +++ b/storage/xtradb/dict/dict0crea.c @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1996, 2010, Innobase Oy. All Rights Reserved. +Copyright (c) 1996, 2011, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -899,7 +899,7 @@ dict_truncate_index_tree( appropriate field in the SYS_INDEXES record: this mini-transaction marks the B-tree totally truncated */ - btr_block_get(space, zip_size, root_page_no, RW_X_LATCH, mtr); + btr_block_get(space, zip_size, root_page_no, RW_X_LATCH, NULL, mtr); btr_free_root(space, zip_size, root_page_no, mtr); create: diff --git a/storage/xtradb/dict/dict0dict.c b/storage/xtradb/dict/dict0dict.c index a8a1d7a11e6..574b0e5d7da 100644 --- a/storage/xtradb/dict/dict0dict.c +++ b/storage/xtradb/dict/dict0dict.c @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1996, 2010, Innobase Oy. All Rights Reserved. +Copyright (c) 1996, 2011, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -24,6 +24,8 @@ Created 1/8/1996 Heikki Tuuri ***********************************************************************/ #include "dict0dict.h" +#include "m_string.h" +#include "my_sys.h" #ifdef UNIV_NONINL #include "dict0dict.ic" @@ -270,15 +272,39 @@ dict_table_stats_lock( ulint latch_mode) /*!< in: RW_S_LATCH or RW_X_LATCH */ { + rw_lock_t *want, *got; + ut_ad(table != NULL); ut_ad(table->magic_n == DICT_TABLE_MAGIC_N); switch (latch_mode) { case RW_S_LATCH: - rw_lock_s_lock(GET_TABLE_STATS_LATCH(table)); + /* Lock one of dict_table_stats_latches in S-mode. + Latch is picked using table->id. table->id might be + changed while we are waiting for lock to be grabbed */ + for (;;) { + want= GET_TABLE_STATS_LATCH(table); + rw_lock_s_lock(want); + got= GET_TABLE_STATS_LATCH(table); + if (want == got) { + break; + } + rw_lock_s_unlock(want); + } break; case RW_X_LATCH: - rw_lock_x_lock(GET_TABLE_STATS_LATCH(table)); + /* Lock one of dict_table_stats_latches in X-mode. + Latch is picked using table->id. table->id might be + changed while we are waiting for lock to be grabbed */ + for (;;) { + want= GET_TABLE_STATS_LATCH(table); + rw_lock_x_lock(want); + got= GET_TABLE_STATS_LATCH(table); + if (want == got) { + break; + } + rw_lock_x_unlock(want); + } break; case RW_NO_LATCH: /* fall through */ @@ -1164,12 +1190,21 @@ dict_table_change_id_in_cache( dict_table_t* table, /*!< in/out: table object already in cache */ dulint new_id) /*!< in: new id to set */ { + dict_table_t table_tmp; + ut_ad(table); ut_ad(mutex_own(&(dict_sys->mutex))); ut_ad(table->magic_n == DICT_TABLE_MAGIC_N); /* Remove the table from the hash table of id's */ + /* Lock is needed to prevent dict_table_stats_latches from + being leaked. dict_table_stats_lock picks one latch using + table->id. We are changing table->id below. That is why + we also should remember the old value to unlock table */ + dict_table_stats_lock(table, RW_X_LATCH); + table_tmp= *table; + HASH_DELETE(dict_table_t, id_hash, dict_sys->table_id_hash, ut_fold_dulint(table->id), table); table->id = new_id; @@ -1177,6 +1212,8 @@ dict_table_change_id_in_cache( /* Add the table back to the hash table */ HASH_INSERT(dict_table_t, id_hash, dict_sys->table_id_hash, ut_fold_dulint(table->id), table); + + dict_table_stats_unlock(&table_tmp, RW_X_LATCH); } /**********************************************************************//** @@ -1724,7 +1761,9 @@ undo_size_ok: new_index->stat_n_leaf_pages = 1; new_index->page = page_no; - rw_lock_create(&new_index->lock, SYNC_INDEX_TREE); + rw_lock_create(&new_index->lock, + dict_index_is_ibuf(index) + ? SYNC_IBUF_INDEX_TREE : SYNC_INDEX_TREE); if (!UNIV_UNLIKELY(new_index->type & DICT_UNIVERSAL)) { @@ -2338,6 +2377,8 @@ dict_foreign_free( /*==============*/ dict_foreign_t* foreign) /*!< in, own: foreign key struct */ { + ut_a(foreign->foreign_table->n_foreign_key_checks_running == 0); + mem_heap_free(foreign->heap); } @@ -4306,19 +4347,26 @@ dict_reload_statistics( heap = mem_heap_create(1000); while (index) { + mtr_t mtr; + if (table->is_corrupt) { ut_a(srv_pass_corrupt_table); mem_heap_free(heap); return(FALSE); } - size = btr_get_size(index, BTR_TOTAL_SIZE); + mtr_start(&mtr); + mtr_s_lock(dict_index_get_lock(index), &mtr); + + size = btr_get_size(index, BTR_TOTAL_SIZE, &mtr); index->stat_index_size = size; *sum_of_index_sizes += size; - size = btr_get_size(index, BTR_N_LEAF_PAGES); + size = btr_get_size(index, BTR_N_LEAF_PAGES, &mtr); + + mtr_commit(&mtr); if (size == 0) { /* The root node of the tree is a leaf */ @@ -4668,16 +4716,27 @@ dict_update_statistics( (srv_force_recovery < SRV_FORCE_NO_IBUF_MERGE || (srv_force_recovery < SRV_FORCE_NO_LOG_REDO && dict_index_is_clust(index)))) { + mtr_t mtr; ulint size; - size = btr_get_size(index, BTR_TOTAL_SIZE); - index->stat_index_size = size; + mtr_start(&mtr); + mtr_s_lock(dict_index_get_lock(index), &mtr); - sum_of_index_sizes += size; + size = btr_get_size(index, BTR_TOTAL_SIZE, &mtr); - size = btr_get_size(index, BTR_N_LEAF_PAGES); + if (size != ULINT_UNDEFINED) { + sum_of_index_sizes += size; + index->stat_index_size = size; + size = btr_get_size( + index, BTR_N_LEAF_PAGES, &mtr); + } - if (size == 0) { + mtr_commit(&mtr); + + switch (size) { + case ULINT_UNDEFINED: + goto fake_statistics; + case 0: /* The root node of the tree is a leaf */ size = 1; } @@ -4694,6 +4753,7 @@ dict_update_statistics( various means, also via secondary indexes. */ ulint i; +fake_statistics: sum_of_index_sizes++; index->stat_index_size = index->stat_n_leaf_pages = 1; diff --git a/storage/xtradb/dict/dict0load.c b/storage/xtradb/dict/dict0load.c index 64d7fad3557..d026306a646 100644 --- a/storage/xtradb/dict/dict0load.c +++ b/storage/xtradb/dict/dict0load.c @@ -430,7 +430,7 @@ loop: object and check that the .ibd file exists. */ fil_open_single_table_tablespace(FALSE, space_id, - flags, name); + flags, name, NULL); } mem_free(name); @@ -1023,7 +1023,7 @@ err_exit: if (!fil_open_single_table_tablespace( TRUE, space, flags == DICT_TF_COMPACT ? 0 : - flags & ~(~0 << DICT_TF_BITS), name)) { + flags & ~(~0 << DICT_TF_BITS), name, NULL)) { /* We failed to find a sensible tablespace file */ diff --git a/storage/xtradb/fil/fil0fil.c b/storage/xtradb/fil/fil0fil.c index 17ca4cb1745..1cc6654a88e 100644 --- a/storage/xtradb/fil/fil0fil.c +++ b/storage/xtradb/fil/fil0fil.c @@ -183,7 +183,7 @@ struct fil_space_struct { .ibd file of tablespace and want to stop temporarily posting of new i/o requests on the file */ - ibool stop_ibuf_merges; + ibool stop_new_ops; /*!< we set this TRUE when we start deleting a single-table tablespace */ ibool is_being_deleted; @@ -208,12 +208,13 @@ struct fil_space_struct { ulint n_pending_flushes; /*!< this is positive when flushing the tablespace to disk; dropping of the tablespace is forbidden if this is positive */ - ulint n_pending_ibuf_merges;/*!< this is positive - when merging insert buffer entries to - a page so that we may need to access - the ibuf bitmap page in the - tablespade: dropping of the tablespace - is forbidden if this is positive */ + ulint n_pending_ops;/*!< this is positive when we + have pending operations against this + tablespace. The pending operations can + be ibuf merges or lock validation code + trying to read a block. + Dropping of the tablespace is forbidden + if this is positive */ hash_node_t hash; /*!< hash chain node */ hash_node_t name_hash;/*!< hash chain the name_hash table */ #ifndef UNIV_HOTBACKUP @@ -928,11 +929,6 @@ retry: return; } - if (fil_system->n_open < fil_system->max_n_open) { - - return; - } - space = fil_space_get_by_id(space_id); if (space != NULL && space->stop_ios) { @@ -949,6 +945,25 @@ retry: mutex_exit(&fil_system->mutex); +#ifndef UNIV_HOTBACKUP + + /* Wake the i/o-handler threads to make sure pending + i/o's are performed */ + os_aio_simulated_wake_handler_threads(); + + /* The sleep here is just to give IO helper threads a + bit of time to do some work. It is not required that + all IO related to the tablespace being renamed must + be flushed here as we do fil_flush() in + fil_rename_tablespace() as well. */ + os_thread_sleep(20000); + +#endif /* UNIV_HOTBACKUP */ + + /* Flush tablespaces so that we can close modified + files in the LRU list */ + fil_flush_file_spaces(FIL_TABLESPACE); + os_thread_sleep(20000); count2++; @@ -956,6 +971,11 @@ retry: goto retry; } + if (fil_system->n_open < fil_system->max_n_open) { + + return; + } + /* If the file is already open, no need to do anything; if the space does not exist, we handle the situation in the function which called this function */ @@ -1228,7 +1248,7 @@ try_again: } space->stop_ios = FALSE; - space->stop_ibuf_merges = FALSE; + space->stop_new_ops = FALSE; space->is_being_deleted = FALSE; space->purpose = purpose; space->size = 0; @@ -1237,7 +1257,7 @@ try_again: space->n_reserved_extents = 0; space->n_pending_flushes = 0; - space->n_pending_ibuf_merges = 0; + space->n_pending_ops = 0; UT_LIST_INIT(space->chain); space->magic_n = FIL_SPACE_MAGIC_N; @@ -1840,13 +1860,12 @@ fil_read_flushed_lsn_and_arch_log_no( #ifndef UNIV_HOTBACKUP /*******************************************************************//** -Increments the count of pending insert buffer page merges, if space is not -being deleted. -@return TRUE if being deleted, and ibuf merges should be skipped */ +Increments the count of pending operation, if space is not being deleted. +@return TRUE if being deleted, and operation should be skipped */ UNIV_INTERN ibool -fil_inc_pending_ibuf_merges( -/*========================*/ +fil_inc_pending_ops( +/*================*/ ulint id) /*!< in: space id */ { fil_space_t* space; @@ -1862,13 +1881,13 @@ fil_inc_pending_ibuf_merges( (ulong) id); } - if (space == NULL || space->stop_ibuf_merges) { + if (space == NULL || space->stop_new_ops) { mutex_exit(&fil_system->mutex); return(TRUE); } - space->n_pending_ibuf_merges++; + space->n_pending_ops++; mutex_exit(&fil_system->mutex); @@ -1876,11 +1895,11 @@ fil_inc_pending_ibuf_merges( } /*******************************************************************//** -Decrements the count of pending insert buffer page merges. */ +Decrements the count of pending operations. */ UNIV_INTERN void -fil_decr_pending_ibuf_merges( -/*=========================*/ +fil_decr_pending_ops( +/*=================*/ ulint id) /*!< in: space id */ { fil_space_t* space; @@ -1891,13 +1910,13 @@ fil_decr_pending_ibuf_merges( if (space == NULL) { fprintf(stderr, - "InnoDB: Error: decrementing ibuf merge of a" - " dropped tablespace %lu\n", + "InnoDB: Error: decrementing pending operation" + " of a dropped tablespace %lu\n", (ulong) id); } if (space != NULL) { - space->n_pending_ibuf_merges--; + space->n_pending_ops--; } mutex_exit(&fil_system->mutex); @@ -2187,15 +2206,15 @@ fil_delete_tablespace( char* path; ut_a(id != 0); -stop_ibuf_merges: +stop_new_ops: mutex_enter(&fil_system->mutex); space = fil_space_get_by_id(id); if (space != NULL) { - space->stop_ibuf_merges = TRUE; + space->stop_new_ops = TRUE; - if (space->n_pending_ibuf_merges == 0) { + if (space->n_pending_ops == 0) { mutex_exit(&fil_system->mutex); count = 0; @@ -2209,9 +2228,10 @@ stop_ibuf_merges: ut_print_filename(stderr, space->name); fprintf(stderr, ",\n" "InnoDB: but there are %lu pending" - " ibuf merges on it.\n" + " operations (most likely ibuf merges)" + " on it.\n" "InnoDB: Loop %lu.\n", - (ulong) space->n_pending_ibuf_merges, + (ulong) space->n_pending_ops, (ulong) count); } @@ -2220,7 +2240,7 @@ stop_ibuf_merges: os_thread_sleep(20000); count++; - goto stop_ibuf_merges; + goto stop_new_ops; } } @@ -2246,7 +2266,7 @@ try_again: } ut_a(space); - ut_a(space->n_pending_ibuf_merges == 0); + ut_a(space->n_pending_ops == 0); space->is_being_deleted = TRUE; @@ -2523,7 +2543,7 @@ fil_rename_tablespace( retry: count++; - if (count > 1000) { + if (!(count % 1000)) { ut_print_timestamp(stderr); fputs(" InnoDB: Warning: problems renaming ", stderr); ut_print_filename(stderr, old_name); @@ -3124,8 +3144,11 @@ fil_open_single_table_tablespace( accessing the first page of the file */ ulint id, /*!< in: space id */ ulint flags, /*!< in: tablespace flags */ - const char* name) /*!< in: table name in the + const char* name, /*!< in: table name in the databasename/tablename format */ + trx_t* trx) /*!< in: transaction. This is only used + for IMPORT TABLESPACE, must be NULL + otherwise */ { os_file_t file; char* filepath; @@ -3342,6 +3365,11 @@ skip_info: /* over write space id of all pages */ rec_offs_init(offsets_); + /* Unlock the data dictionary to not block queries + accessing other tables */ + ut_a(trx); + row_mysql_unlock_data_dictionary(trx); + fprintf(stderr, "InnoDB: Progress in %%:"); for (offset = 0; offset < free_limit_bytes; @@ -3543,6 +3571,9 @@ skip_write: fprintf(stderr, " done.\n"); + /* Reacquire the data dictionary lock */ + row_mysql_lock_data_dictionary(trx); + /* update SYS_INDEXES set root page */ index = dict_table_get_first_index(table); while (index) { @@ -3835,7 +3866,7 @@ convert_err_exit: level = btr_page_get_level(page, &mtr); - new_block = btr_page_alloc(index, 0, FSP_NO_DIR, level, &mtr); + new_block = btr_page_alloc(index, 0, FSP_NO_DIR, level, &mtr, &mtr); new_page = buf_block_get_frame(new_block); new_page_zip = buf_block_get_page_zip(new_block); btr_page_create(new_block, new_page_zip, index, level, &mtr); @@ -3883,7 +3914,7 @@ convert_err_exit: split_rec = page_get_middle_rec(page); new_block = btr_page_alloc(index, page_no + 1, FSP_UP, - btr_page_get_level(page, &mtr), &mtr); + btr_page_get_level(page, &mtr), &mtr, &mtr); new_page = buf_block_get_frame(new_block); new_page_zip = buf_block_get_page_zip(new_block); btr_page_create(new_block, new_page_zip, index, diff --git a/storage/xtradb/fsp/fsp0fsp.c b/storage/xtradb/fsp/fsp0fsp.c index c8e4f8e269c..1b437c226a7 100644 --- a/storage/xtradb/fsp/fsp0fsp.c +++ b/storage/xtradb/fsp/fsp0fsp.c @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1995, 2010, Innobase Oy. All Rights Reserved. +Copyright (c) 1995, 2012, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -11,8 +11,8 @@ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with -this program; if not, write to the Free Software Foundation, Inc., 59 Temple -Place, Suite 330, Boston, MA 02111-1307 USA +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA *****************************************************************************/ @@ -273,15 +273,13 @@ fseg_n_reserved_pages_low( /********************************************************************//** Marks a page used. The page must reside within the extents of the given segment. */ -static +static __attribute__((nonnull)) void fseg_mark_page_used( /*================*/ fseg_inode_t* seg_inode,/*!< in: segment inode */ - ulint space, /*!< in: space id */ - ulint zip_size,/*!< in: compressed page size in bytes - or 0 for uncompressed pages */ ulint page, /*!< in: page offset */ + xdes_t* descr, /* extent descriptor */ mtr_t* mtr); /*!< in: mtr */ /**********************************************************************//** Returns the first extent descriptor for a segment. We think of the extent @@ -312,28 +310,38 @@ fsp_fill_free_list( descriptor page and ibuf bitmap page; then we do not allocate more extents */ ulint space, /*!< in: space */ - fsp_header_t* header, /*!< in: space header */ - mtr_t* mtr); /*!< in: mtr */ + fsp_header_t* header, /*!< in/out: space header */ + mtr_t* mtr) /*!< in/out: mini-transaction */ + __attribute__((nonnull)); /**********************************************************************//** Allocates a single free page from a segment. This function implements the intelligent allocation strategy which tries to minimize file space fragmentation. -@return the allocated page number, FIL_NULL if no page could be allocated */ +@retval NULL if no page could be allocated +@retval block, rw_lock_x_lock_count(&block->lock) == 1 if allocation succeeded +(init_mtr == mtr, or the page was not previously freed in mtr) +@retval block (not allocated or initialized) otherwise */ static -ulint +buf_block_t* fseg_alloc_free_page_low( /*=====================*/ ulint space, /*!< in: space */ ulint zip_size,/*!< in: compressed page size in bytes or 0 for uncompressed pages */ - fseg_inode_t* seg_inode, /*!< in: segment inode */ - ulint hint, /*!< in: hint of which page would be desirable */ + fseg_inode_t* seg_inode, /*!< in/out: segment inode */ + ulint hint, /*!< in: hint of which page would be + desirable */ byte direction, /*!< in: if the new page is needed because of an index page split, and records are inserted there in order, into which direction they go alphabetically: FSP_DOWN, FSP_UP, FSP_NO_DIR */ - mtr_t* mtr); /*!< in: mtr handle */ + mtr_t* mtr, /*!< in/out: mini-transaction */ + mtr_t* init_mtr)/*!< in/out: mtr or another mini-transaction + in which the page should be initialized. + If init_mtr!=mtr, but the page is already + latched in mtr, do not initialize the page. */ + __attribute__((warn_unused_result, nonnull)); #endif /* !UNIV_HOTBACKUP */ /**********************************************************************//** @@ -703,23 +711,22 @@ xdes_calc_descriptor_index( /********************************************************************//** Gets pointer to a the extent descriptor of a page. The page where the extent -descriptor resides is x-locked. If the page offset is equal to the free limit -of the space, adds new extents from above the free limit to the space free -list, if not free limit == space size. This adding is necessary to make the -descriptor defined, as they are uninitialized above the free limit. +descriptor resides is x-locked. This function no longer extends the data +file. @return pointer to the extent descriptor, NULL if the page does not -exist in the space or if the offset exceeds the free limit */ -UNIV_INLINE +exist in the space or if the offset is >= the free limit */ +UNIV_INLINE __attribute__((nonnull, warn_unused_result)) xdes_t* xdes_get_descriptor_with_space_hdr( /*===============================*/ - fsp_header_t* sp_header,/*!< in/out: space header, x-latched */ - ulint space, /*!< in: space id */ - ulint offset, /*!< in: page offset; - if equal to the free limit, - we try to add new extents to - the space free list */ - mtr_t* mtr) /*!< in: mtr handle */ + fsp_header_t* sp_header, /*!< in/out: space header, x-latched + in mtr */ + ulint space, /*!< in: space id */ + ulint offset, /*!< in: page offset; if equal + to the free limit, we try to + add new extents to the space + free list */ + mtr_t* mtr) /*!< in/out: mini-transaction */ { ulint limit; ulint size; @@ -727,11 +734,9 @@ xdes_get_descriptor_with_space_hdr( ulint descr_page_no; page_t* descr_page; - ut_ad(mtr); ut_ad(mtr_memo_contains(mtr, fil_space_get_latch(space, NULL), MTR_MEMO_X_LOCK)); - ut_ad(mtr_memo_contains_page(mtr, sp_header, MTR_MEMO_PAGE_S_FIX) - || mtr_memo_contains_page(mtr, sp_header, MTR_MEMO_PAGE_X_FIX)); + ut_ad(mtr_memo_contains_page(mtr, sp_header, MTR_MEMO_PAGE_X_FIX)); ut_ad(page_offset(sp_header) == FSP_HEADER_OFFSET); /* Read free limit and space size */ limit = mach_read_from_4(sp_header + FSP_FREE_LIMIT); @@ -739,19 +744,10 @@ xdes_get_descriptor_with_space_hdr( zip_size = dict_table_flags_to_zip_size( mach_read_from_4(sp_header + FSP_SPACE_FLAGS)); - /* If offset is >= size or > limit, return NULL */ - - if ((offset >= size) || (offset > limit)) { - + if ((offset >= size) || (offset >= limit)) { return(NULL); } - /* If offset is == limit, fill free list of the space. */ - - if (offset == limit) { - fsp_fill_free_list(FALSE, space, sp_header, mtr); - } - descr_page_no = xdes_calc_descriptor_page(zip_size, offset); if (descr_page_no == 0) { @@ -781,7 +777,7 @@ is necessary to make the descriptor defined, as they are uninitialized above the free limit. @return pointer to the extent descriptor, NULL if the page does not exist in the space or if the offset exceeds the free limit */ -static +static __attribute__((nonnull, warn_unused_result)) xdes_t* xdes_get_descriptor( /*================*/ @@ -790,7 +786,7 @@ xdes_get_descriptor( or 0 for uncompressed pages */ ulint offset, /*!< in: page offset; if equal to the free limit, we try to add new extents to the space free list */ - mtr_t* mtr) /*!< in: mtr handle */ + mtr_t* mtr) /*!< in/out: mini-transaction */ { buf_block_t* block; fsp_header_t* sp_header; @@ -1174,14 +1170,14 @@ fsp_header_get_tablespace_size(void) Tries to extend a single-table tablespace so that a page would fit in the data file. @return TRUE if success */ -static +static __attribute__((nonnull, warn_unused_result)) ibool fsp_try_extend_data_file_with_pages( /*================================*/ ulint space, /*!< in: space */ ulint page_no, /*!< in: page number */ - fsp_header_t* header, /*!< in: space header */ - mtr_t* mtr) /*!< in: mtr */ + fsp_header_t* header, /*!< in/out: space header */ + mtr_t* mtr) /*!< in/out: mini-transaction */ { ibool success; ulint actual_size; @@ -1206,7 +1202,7 @@ fsp_try_extend_data_file_with_pages( /***********************************************************************//** Tries to extend the last data file of a tablespace if it is auto-extending. @return FALSE if not auto-extending */ -static +static __attribute__((nonnull)) ibool fsp_try_extend_data_file( /*=====================*/ @@ -1216,8 +1212,8 @@ fsp_try_extend_data_file( the actual file size rounded down to megabyte */ ulint space, /*!< in: space */ - fsp_header_t* header, /*!< in: space header */ - mtr_t* mtr) /*!< in: mtr */ + fsp_header_t* header, /*!< in/out: space header */ + mtr_t* mtr) /*!< in/out: mini-transaction */ { ulint size; ulint zip_size; @@ -1353,7 +1349,7 @@ fsp_fill_free_list( then we do not allocate more extents */ ulint space, /*!< in: space */ fsp_header_t* header, /*!< in/out: space header */ - mtr_t* mtr) /*!< in: mtr */ + mtr_t* mtr) /*!< in/out: mini-transaction */ { ulint limit; ulint size; @@ -1552,29 +1548,120 @@ fsp_alloc_free_extent( } /**********************************************************************//** -Allocates a single free page from a space. The page is marked as used. -@return the page offset, FIL_NULL if no page could be allocated */ +Allocates a single free page from a space. */ +static __attribute__((nonnull)) +void +fsp_alloc_from_free_frag( +/*=====================*/ + fsp_header_t* header, /*!< in/out: tablespace header */ + xdes_t* descr, /*!< in/out: extent descriptor */ + ulint bit, /*!< in: slot to allocate in the extent */ + mtr_t* mtr) /*!< in/out: mini-transaction */ +{ + ulint frag_n_used; + + ut_ad(xdes_get_state(descr, mtr) == XDES_FREE_FRAG); + ut_a(xdes_get_bit(descr, XDES_FREE_BIT, bit, mtr)); + xdes_set_bit(descr, XDES_FREE_BIT, bit, FALSE, mtr); + + /* Update the FRAG_N_USED field */ + frag_n_used = mtr_read_ulint(header + FSP_FRAG_N_USED, MLOG_4BYTES, + mtr); + frag_n_used++; + mlog_write_ulint(header + FSP_FRAG_N_USED, frag_n_used, MLOG_4BYTES, + mtr); + if (xdes_is_full(descr, mtr)) { + /* The fragment is full: move it to another list */ + flst_remove(header + FSP_FREE_FRAG, descr + XDES_FLST_NODE, + mtr); + xdes_set_state(descr, XDES_FULL_FRAG, mtr); + + flst_add_last(header + FSP_FULL_FRAG, descr + XDES_FLST_NODE, + mtr); + mlog_write_ulint(header + FSP_FRAG_N_USED, + frag_n_used - FSP_EXTENT_SIZE, MLOG_4BYTES, + mtr); + } +} + +/**********************************************************************//** +Gets a buffer block for an allocated page. + +NOTE: If init_mtr != mtr, the block will only be initialized if it was +not previously x-latched. It is assumed that the block has been +x-latched only by mtr, and freed in mtr in that case. + +@return block, initialized if init_mtr==mtr +or rw_lock_x_lock_count(&block->lock) == 1 */ static -ulint +buf_block_t* +fsp_page_create( +/*============*/ + ulint space, /*!< in: space id of the allocated page */ + ulint zip_size, /*!< in: compressed page size in bytes + or 0 for uncompressed pages */ + ulint page_no, /*!< in: page number of the allocated page */ + mtr_t* mtr, /*!< in: mini-transaction of the allocation */ + mtr_t* init_mtr) /*!< in: mini-transaction for initializing + the page */ +{ + buf_block_t* block + = buf_page_create(space, page_no, zip_size, init_mtr); +#ifdef UNIV_SYNC_DEBUG + ut_ad(mtr_memo_contains(mtr, block, MTR_MEMO_PAGE_X_FIX) + == rw_lock_own(&block->lock, RW_LOCK_EX)); +#endif /* UNIV_SYNC_DEBUG */ + + /* Mimic buf_page_get(), but avoid the buf_pool->page_hash lookup. */ + rw_lock_x_lock(&block->lock); + mutex_enter(&block->mutex); + buf_block_buf_fix_inc(block, __FILE__, __LINE__); + mutex_exit(&block->mutex); + mtr_memo_push(init_mtr, block, MTR_MEMO_PAGE_X_FIX); + + if (init_mtr == mtr + || rw_lock_get_x_lock_count(&block->lock) == 1) { + + /* Initialize the page, unless it was already + X-latched in mtr. (In this case, we would want to + allocate another page that has not been freed in mtr.) */ + ut_ad(init_mtr == mtr + || !mtr_memo_contains(mtr, block, MTR_MEMO_PAGE_X_FIX)); + + fsp_init_file_page(block, init_mtr); + } + + return(block); +} + +/**********************************************************************//** +Allocates a single free page from a space. The page is marked as used. +@retval NULL if no page could be allocated +@retval block, rw_lock_x_lock_count(&block->lock) == 1 if allocation succeeded +(init_mtr == mtr, or the page was not previously freed in mtr) +@retval block (not allocated or initialized) otherwise */ +static __attribute__((nonnull, warn_unused_result)) +buf_block_t* fsp_alloc_free_page( /*================*/ ulint space, /*!< in: space id */ ulint zip_size,/*!< in: compressed page size in bytes or 0 for uncompressed pages */ ulint hint, /*!< in: hint of which page would be desirable */ - mtr_t* mtr) /*!< in: mtr handle */ + mtr_t* mtr, /*!< in/out: mini-transaction */ + mtr_t* init_mtr)/*!< in/out: mini-transaction in which the + page should be initialized + (may be the same as mtr) */ { fsp_header_t* header; fil_addr_t first; xdes_t* descr; - buf_block_t* block; ulint free; - ulint frag_n_used; ulint page_no; ulint space_size; - ibool success; ut_ad(mtr); + ut_ad(init_mtr); header = fsp_get_space_header(space, zip_size, mtr); @@ -1601,7 +1688,7 @@ fsp_alloc_free_page( if (descr == NULL) { /* No free space left */ - return(FIL_NULL); + return(NULL); } xdes_set_state(descr, XDES_FREE_FRAG, mtr); @@ -1646,50 +1733,18 @@ fsp_alloc_free_page( " space size %lu. Page no %lu.\n", (ulong) space, (ulong) space_size, (ulong) page_no); - return(FIL_NULL); + return(NULL); } - success = fsp_try_extend_data_file_with_pages(space, page_no, - header, mtr); - if (!success) { + if (!fsp_try_extend_data_file_with_pages(space, page_no, + header, mtr)) { /* No disk space left */ - return(FIL_NULL); + return(NULL); } } - xdes_set_bit(descr, XDES_FREE_BIT, free, FALSE, mtr); + fsp_alloc_from_free_frag(header, descr, free, mtr); - /* Update the FRAG_N_USED field */ - frag_n_used = mtr_read_ulint(header + FSP_FRAG_N_USED, MLOG_4BYTES, - mtr); - frag_n_used++; - mlog_write_ulint(header + FSP_FRAG_N_USED, frag_n_used, MLOG_4BYTES, - mtr); - if (xdes_is_full(descr, mtr)) { - /* The fragment is full: move it to another list */ - flst_remove(header + FSP_FREE_FRAG, descr + XDES_FLST_NODE, - mtr); - xdes_set_state(descr, XDES_FULL_FRAG, mtr); - - flst_add_last(header + FSP_FULL_FRAG, descr + XDES_FLST_NODE, - mtr); - mlog_write_ulint(header + FSP_FRAG_N_USED, - frag_n_used - FSP_EXTENT_SIZE, MLOG_4BYTES, - mtr); - } - - /* Initialize the allocated page to the buffer pool, so that it can - be obtained immediately with buf_page_get without need for a disk - read. */ - - buf_page_create(space, page_no, zip_size, mtr); - - block = buf_page_get(space, zip_size, page_no, RW_X_LATCH, mtr); - buf_block_dbg_add_level(block, SYNC_FSP_PAGE); - - /* Prior contents of the page should be ignored */ - fsp_init_file_page(block, mtr); - - return(page_no); + return(fsp_page_create(space, zip_size, page_no, mtr, init_mtr)); } /**********************************************************************//** @@ -1728,6 +1783,9 @@ fsp_free_page( fputs("InnoDB: Dump of descriptor: ", stderr); ut_print_buf(stderr, ((byte*)descr) - 50, 200); putc('\n', stderr); + /* Crash in debug version, so that we get a core dump + of this corruption. */ + ut_ad(0); if (state == XDES_FREE) { /* We put here some fault tolerance: if the page @@ -1746,6 +1804,9 @@ fsp_free_page( "InnoDB: Dump of descriptor: ", (ulong) page); ut_print_buf(stderr, ((byte*)descr) - 50, 200); putc('\n', stderr); + /* Crash in debug version, so that we get a core dump + of this corruption. */ + ut_ad(0); /* We put here some fault tolerance: if the page is already free, return without doing anything! */ @@ -1780,6 +1841,8 @@ fsp_free_page( mtr); fsp_free_extent(space, zip_size, page, mtr); } + + mtr->n_freed_pages++; } /**********************************************************************//** @@ -1917,7 +1980,6 @@ fsp_alloc_seg_inode_page( fseg_inode_t* inode; buf_block_t* block; page_t* page; - ulint page_no; ulint space; ulint zip_size; ulint i; @@ -1928,15 +1990,15 @@ fsp_alloc_seg_inode_page( zip_size = dict_table_flags_to_zip_size( mach_read_from_4(FSP_SPACE_FLAGS + space_header)); - page_no = fsp_alloc_free_page(space, zip_size, 0, mtr); + block = fsp_alloc_free_page(space, zip_size, 0, mtr, mtr); - if (page_no == FIL_NULL) { + if (block == NULL) { return(FALSE); } - block = buf_page_get(space, zip_size, page_no, RW_X_LATCH, mtr); buf_block_dbg_add_level(block, SYNC_FSP_PAGE); + ut_ad(rw_lock_get_x_lock_count(&block->lock) == 1); block->check_index_page_at_flush = FALSE; @@ -2351,19 +2413,20 @@ fseg_create_general( } if (page == 0) { - page = fseg_alloc_free_page_low(space, zip_size, - inode, 0, FSP_UP, mtr); + block = fseg_alloc_free_page_low(space, zip_size, + inode, 0, FSP_UP, mtr, mtr); - if (page == FIL_NULL) { + if (block == NULL) { fsp_free_seg_inode(space, zip_size, inode, mtr); goto funct_exit; } - block = buf_page_get(space, zip_size, page, RW_X_LATCH, mtr); + ut_ad(rw_lock_get_x_lock_count(&block->lock) == 1); + header = byte_offset + buf_block_get_frame(block); - mlog_write_ulint(header - byte_offset + FIL_PAGE_TYPE, + mlog_write_ulint(buf_block_get_frame(block) + FIL_PAGE_TYPE, FIL_PAGE_TYPE_SYS, MLOG_2BYTES, mtr); } @@ -2540,8 +2603,10 @@ fseg_fill_free_list( Allocates a free extent for the segment: looks first in the free list of the segment, then tries to allocate from the space free list. NOTE that the extent returned still resides in the segment free list, it is not yet taken off it! -@return allocated extent, still placed in the segment free list, NULL -if could not be allocated */ +@retval NULL if no page could be allocated +@retval block, rw_lock_x_lock_count(&block->lock) == 1 if allocation succeeded +(init_mtr == mtr, or the page was not previously freed in mtr) +@retval block (not allocated or initialized) otherwise */ static xdes_t* fseg_alloc_free_extent( @@ -2593,22 +2658,30 @@ fseg_alloc_free_extent( Allocates a single free page from a segment. This function implements the intelligent allocation strategy which tries to minimize file space fragmentation. -@return the allocated page number, FIL_NULL if no page could be allocated */ +@retval NULL if no page could be allocated +@retval block, rw_lock_x_lock_count(&block->lock) == 1 if allocation succeeded +(init_mtr == mtr, or the page was not previously freed in mtr) +@retval block (not allocated or initialized) otherwise */ static -ulint +buf_block_t* fseg_alloc_free_page_low( /*=====================*/ ulint space, /*!< in: space */ ulint zip_size,/*!< in: compressed page size in bytes or 0 for uncompressed pages */ - fseg_inode_t* seg_inode, /*!< in: segment inode */ - ulint hint, /*!< in: hint of which page would be desirable */ + fseg_inode_t* seg_inode, /*!< in/out: segment inode */ + ulint hint, /*!< in: hint of which page would be + desirable */ byte direction, /*!< in: if the new page is needed because of an index page split, and records are inserted there in order, into which direction they go alphabetically: FSP_DOWN, FSP_UP, FSP_NO_DIR */ - mtr_t* mtr) /*!< in: mtr handle */ + mtr_t* mtr, /*!< in/out: mini-transaction */ + mtr_t* init_mtr)/*!< in/out: mtr or another mini-transaction + in which the page should be initialized. + If init_mtr!=mtr, but the page is already + latched in mtr, do not initialize the page. */ { fsp_header_t* space_header; ulint space_size; @@ -2619,7 +2692,6 @@ fseg_alloc_free_page_low( ulint ret_page; /*!< the allocated page offset, FIL_NULL if could not be allocated */ xdes_t* ret_descr; /*!< the extent of the allocated page */ - ibool frag_page_allocated = FALSE; ibool success; ulint n; @@ -2641,6 +2713,7 @@ fseg_alloc_free_page_low( if (descr == NULL) { /* Hint outside space or too high above free limit: reset hint */ + /* The file space header page is always allocated. */ hint = 0; descr = xdes_get_descriptor(space, zip_size, hint, mtr); } @@ -2652,15 +2725,19 @@ fseg_alloc_free_page_low( mtr), seg_id)) && (xdes_get_bit(descr, XDES_FREE_BIT, hint % FSP_EXTENT_SIZE, mtr) == TRUE)) { - +take_hinted_page: /* 1. We can take the hinted page =================================*/ ret_descr = descr; ret_page = hint; + /* Skip the check for extending the tablespace. If the + page hint were not within the size of the tablespace, + we would have got (descr == NULL) above and reset the hint. */ + goto got_hinted_page; /*-----------------------------------------------------------*/ - } else if ((xdes_get_state(descr, mtr) == XDES_FREE) - && ((reserved - used) < reserved / FSEG_FILLFACTOR) - && (used >= FSEG_FRAG_LIMIT)) { + } else if (xdes_get_state(descr, mtr) == XDES_FREE + && reserved - used < reserved / FSEG_FILLFACTOR + && used >= FSEG_FRAG_LIMIT) { /* 2. We allocate the free extent from space and can take ========================================================= @@ -2678,7 +2755,7 @@ fseg_alloc_free_page_low( /* Try to fill the segment free list */ fseg_fill_free_list(seg_inode, space, zip_size, hint + FSP_EXTENT_SIZE, mtr); - ret_page = hint; + goto take_hinted_page; /*-----------------------------------------------------------*/ } else if ((direction != FSP_NO_DIR) && ((reserved - used) < reserved / FSEG_FILLFACTOR) @@ -2727,7 +2804,7 @@ fseg_alloc_free_page_low( first = flst_get_first(seg_inode + FSEG_FREE, mtr); } else { ut_error; - return(FIL_NULL); + return(NULL); } ret_descr = xdes_lst_get_descriptor(space, zip_size, @@ -2739,20 +2816,23 @@ fseg_alloc_free_page_low( } else if (used < FSEG_FRAG_LIMIT) { /* 6. We allocate an individual page from the space ===================================================*/ - ret_page = fsp_alloc_free_page(space, zip_size, hint, mtr); - ret_descr = NULL; + buf_block_t* block = fsp_alloc_free_page( + space, zip_size, hint, mtr, init_mtr); - frag_page_allocated = TRUE; - - if (ret_page != FIL_NULL) { + if (block != NULL) { /* Put the page in the fragment page array of the segment */ n = fseg_find_free_frag_page_slot(seg_inode, mtr); - ut_a(n != FIL_NULL); + ut_a(n != ULINT_UNDEFINED); - fseg_set_nth_frag_page_no(seg_inode, n, ret_page, - mtr); + fseg_set_nth_frag_page_no( + seg_inode, n, buf_block_get_page_no(block), + mtr); } + + /* fsp_alloc_free_page() invoked fsp_init_file_page() + already. */ + return(block); /*-----------------------------------------------------------*/ } else { /* 7. We allocate a new extent and take its first page @@ -2770,7 +2850,7 @@ fseg_alloc_free_page_low( if (ret_page == FIL_NULL) { /* Page could not be allocated */ - return(FIL_NULL); + return(NULL); } if (space != 0) { @@ -2788,38 +2868,22 @@ fseg_alloc_free_page_low( " the space size %lu. Page no %lu.\n", (ulong) space, (ulong) space_size, (ulong) ret_page); - return(FIL_NULL); + return(NULL); } success = fsp_try_extend_data_file_with_pages( space, ret_page, space_header, mtr); if (!success) { /* No disk space left */ - return(FIL_NULL); + return(NULL); } } } - if (!frag_page_allocated) { - /* Initialize the allocated page to buffer pool, so that it - can be obtained immediately with buf_page_get without need - for a disk read */ - buf_block_t* block; - ulint zip_size = dict_table_flags_to_zip_size( - mach_read_from_4(FSP_SPACE_FLAGS + space_header)); - - block = buf_page_create(space, ret_page, zip_size, mtr); - buf_block_dbg_add_level(block, SYNC_FSP_PAGE); - - if (UNIV_UNLIKELY(block != buf_page_get(space, zip_size, - ret_page, RW_X_LATCH, - mtr))) { - ut_error; - } - - /* The prior contents of the page should be ignored */ - fsp_init_file_page(block, mtr); - +got_hinted_page: + /* ret_descr == NULL if the block was allocated from free_frag + (XDES_FREE_FRAG) */ + if (ret_descr != NULL) { /* At this point we know the extent and the page offset. The extent is still in the appropriate list (FSEG_NOT_FULL or FSEG_FREE), and the page is not yet marked as used. */ @@ -2829,25 +2893,31 @@ fseg_alloc_free_page_low( ut_ad(xdes_get_bit(ret_descr, XDES_FREE_BIT, ret_page % FSP_EXTENT_SIZE, mtr) == TRUE); - fseg_mark_page_used(seg_inode, space, zip_size, ret_page, mtr); + fseg_mark_page_used(seg_inode, ret_page, ret_descr, mtr); } - buf_reset_check_index_page_at_flush(space, ret_page); - - return(ret_page); + return(fsp_page_create( + space, dict_table_flags_to_zip_size( + mach_read_from_4(FSP_SPACE_FLAGS + + space_header)), + ret_page, mtr, init_mtr)); } /**********************************************************************//** Allocates a single free page from a segment. This function implements the intelligent allocation strategy which tries to minimize file space fragmentation. -@return allocated page offset, FIL_NULL if no page could be allocated */ +@retval NULL if no page could be allocated +@retval block, rw_lock_x_lock_count(&block->lock) == 1 if allocation succeeded +(init_mtr == mtr, or the page was not previously freed in mtr) +@retval block (not allocated or initialized) otherwise */ UNIV_INTERN -ulint +buf_block_t* fseg_alloc_free_page_general( /*=========================*/ - fseg_header_t* seg_header,/*!< in: segment header */ - ulint hint, /*!< in: hint of which page would be desirable */ + fseg_header_t* seg_header,/*!< in/out: segment header */ + ulint hint, /*!< in: hint of which page would be + desirable */ byte direction,/*!< in: if the new page is needed because of an index page split, and records are inserted there in order, into which @@ -2858,15 +2928,18 @@ fseg_alloc_free_page_general( with fsp_reserve_free_extents, then there is no need to do the check for this individual page */ - mtr_t* mtr) /*!< in: mtr handle */ + mtr_t* mtr, /*!< in/out: mini-transaction handle */ + mtr_t* init_mtr)/*!< in/out: mtr or another mini-transaction + in which the page should be initialized. + If init_mtr!=mtr, but the page is already + latched in mtr, do not initialize the page. */ { fseg_inode_t* inode; ulint space; ulint flags; ulint zip_size; rw_lock_t* latch; - ibool success; - ulint page_no; + buf_block_t* block; ulint n_reserved; space = page_get_space_id(page_align(seg_header)); @@ -2891,43 +2964,20 @@ fseg_alloc_free_page_general( inode = fseg_inode_get(seg_header, space, zip_size, mtr); - if (!has_done_reservation) { - success = fsp_reserve_free_extents(&n_reserved, space, 2, - FSP_NORMAL, mtr); - if (!success) { - return(FIL_NULL); - } + if (!has_done_reservation + && !fsp_reserve_free_extents(&n_reserved, space, 2, + FSP_NORMAL, mtr)) { + return(NULL); } - page_no = fseg_alloc_free_page_low(space, zip_size, - inode, hint, direction, mtr); + block = fseg_alloc_free_page_low(space, zip_size, + inode, hint, direction, + mtr, init_mtr); if (!has_done_reservation) { fil_space_release_free_extents(space, n_reserved); } - return(page_no); -} - -/**********************************************************************//** -Allocates a single free page from a segment. This function implements -the intelligent allocation strategy which tries to minimize file space -fragmentation. -@return allocated page offset, FIL_NULL if no page could be allocated */ -UNIV_INTERN -ulint -fseg_alloc_free_page( -/*=================*/ - fseg_header_t* seg_header,/*!< in: segment header */ - ulint hint, /*!< in: hint of which page would be desirable */ - byte direction,/*!< in: if the new page is needed because - of an index page split, and records are - inserted there in order, into which - direction they go alphabetically: FSP_DOWN, - FSP_UP, FSP_NO_DIR */ - mtr_t* mtr) /*!< in: mtr handle */ -{ - return(fseg_alloc_free_page_general(seg_header, hint, direction, - FALSE, mtr)); + return(block); } /**********************************************************************//** @@ -3249,27 +3299,21 @@ fsp_get_available_space_in_free_extents( /********************************************************************//** Marks a page used. The page must reside within the extents of the given segment. */ -static +static __attribute__((nonnull)) void fseg_mark_page_used( /*================*/ fseg_inode_t* seg_inode,/*!< in: segment inode */ - ulint space, /*!< in: space id */ - ulint zip_size,/*!< in: compressed page size in bytes - or 0 for uncompressed pages */ ulint page, /*!< in: page offset */ + xdes_t* descr, /* extent descriptor */ mtr_t* mtr) /*!< in: mtr */ { - xdes_t* descr; ulint not_full_n_used; - ut_ad(seg_inode && mtr); ut_ad(!((page_offset(seg_inode) - FSEG_ARR_OFFSET) % FSEG_INODE_SIZE)); ut_ad(mach_read_from_4(seg_inode + FSEG_MAGIC_N) == FSEG_MAGIC_N_VALUE); - descr = xdes_get_descriptor(space, zip_size, page, mtr); - ut_ad(mtr_read_ulint(seg_inode + FSEG_ID, MLOG_4BYTES, mtr) == mtr_read_ulint(descr + XDES_ID, MLOG_4BYTES, mtr)); @@ -3448,6 +3492,8 @@ crash: descr + XDES_FLST_NODE, mtr); fsp_free_extent(space, zip_size, page, mtr); } + + mtr->n_freed_pages++; } /**********************************************************************//** diff --git a/storage/xtradb/ha/ha0ha.c b/storage/xtradb/ha/ha0ha.c index 7f11917de0a..65046138275 100644 --- a/storage/xtradb/ha/ha0ha.c +++ b/storage/xtradb/ha/ha0ha.c @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1994, 2009, Innobase Oy. All Rights Reserved. +Copyright (c) 1994, 2011, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -88,40 +88,6 @@ ha_create_func( return(table); } -/*************************************************************//** -Empties a hash table and frees the memory heaps. */ -UNIV_INTERN -void -ha_clear( -/*=====*/ - hash_table_t* table) /*!< in, own: hash table */ -{ - ulint i; - ulint n; - - ut_ad(table); - ut_ad(table->magic_n == HASH_TABLE_MAGIC_N); -#ifdef UNIV_SYNC_DEBUG - ut_ad(rw_lock_own(&btr_search_latch, RW_LOCK_EXCLUSIVE)); -#endif /* UNIV_SYNC_DEBUG */ - -#ifndef UNIV_HOTBACKUP - /* Free the memory heaps. */ - n = table->n_mutexes; - - for (i = 0; i < n; i++) { - mem_heap_free(table->heaps[i]); - } -#endif /* !UNIV_HOTBACKUP */ - - /* Clear the hash table. */ - n = hash_get_n_cells(table); - - for (i = 0; i < n; i++) { - hash_get_nth_cell(table, i)->node = NULL; - } -} - /*************************************************************//** Inserts an entry into a hash table. If an entry with the same fold number is found, its node is updated to point to the new data, and no new node @@ -140,7 +106,7 @@ ha_insert_for_fold_func( #if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG buf_block_t* block, /*!< in: buffer block containing the data */ #endif /* UNIV_AHI_DEBUG || UNIV_DEBUG */ - void* data) /*!< in: data, must not be NULL */ + const rec_t* data) /*!< in: data, must not be NULL */ { hash_cell_t* cell; ha_node_t* node; @@ -153,7 +119,11 @@ ha_insert_for_fold_func( #if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG ut_a(block->frame == page_align(data)); #endif /* UNIV_AHI_DEBUG || UNIV_DEBUG */ +#ifdef UNIV_SYNC_DEBUG + ut_ad(rw_lock_own(&btr_search_latch, RW_LOCK_EX)); +#endif /* UNIV_SYNC_DEBUG */ ASSERT_HASH_MUTEX_OWN(table, fold); + ut_ad(btr_search_enabled); hash = hash_calc_hash(fold, table); @@ -173,7 +143,6 @@ ha_insert_for_fold_func( prev_block->n_pointers--; block->n_pointers++; } - ut_ad(!btr_search_fully_disabled); # endif /* !UNIV_HOTBACKUP */ prev_node->block = block; @@ -186,13 +155,6 @@ ha_insert_for_fold_func( prev_node = prev_node->next; } - /* We are in the process of disabling hash index, do not add - new chain node */ - if (!btr_search_enabled) { - ut_ad(!btr_search_fully_disabled); - return(TRUE); - } - /* We have to allocate a new chain node */ node = mem_heap_alloc(hash_get_heap(table, fold), sizeof(ha_node_t)); @@ -250,6 +212,10 @@ ha_delete_hash_node( { ut_ad(table); ut_ad(table->magic_n == HASH_TABLE_MAGIC_N); +#ifdef UNIV_SYNC_DEBUG + ut_ad(rw_lock_own(&btr_search_latch, RW_LOCK_EX)); +#endif /* UNIV_SYNC_DEBUG */ + ut_ad(btr_search_enabled); #if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG # ifndef UNIV_HOTBACKUP if (table->adaptive) { @@ -272,11 +238,11 @@ ha_search_and_update_if_found_func( /*===============================*/ hash_table_t* table, /*!< in/out: hash table */ ulint fold, /*!< in: folded value of the searched data */ - void* data, /*!< in: pointer to the data */ + const rec_t* data, /*!< in: pointer to the data */ #if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG buf_block_t* new_block,/*!< in: block containing new_data */ #endif /* UNIV_AHI_DEBUG || UNIV_DEBUG */ - void* new_data)/*!< in: new pointer to the data */ + const rec_t* new_data)/*!< in: new pointer to the data */ { ha_node_t* node; @@ -286,6 +252,13 @@ ha_search_and_update_if_found_func( #if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG ut_a(new_block->frame == page_align(new_data)); #endif /* UNIV_AHI_DEBUG || UNIV_DEBUG */ +#ifdef UNIV_SYNC_DEBUG + ut_ad(rw_lock_own(&btr_search_latch, RW_LOCK_EX)); +#endif /* UNIV_SYNC_DEBUG */ + + if (!btr_search_enabled) { + return; + } node = ha_search_with_data(table, fold, data); @@ -322,6 +295,10 @@ ha_remove_all_nodes_to_page( ut_ad(table); ut_ad(table->magic_n == HASH_TABLE_MAGIC_N); ASSERT_HASH_MUTEX_OWN(table, fold); +#ifdef UNIV_SYNC_DEBUG + ut_ad(rw_lock_own(&btr_search_latch, RW_LOCK_EX)); +#endif /* UNIV_SYNC_DEBUG */ + ut_ad(btr_search_enabled); node = ha_chain_get_first(table, fold); diff --git a/storage/xtradb/handler/ha_innodb.cc b/storage/xtradb/handler/ha_innodb.cc index 34e25b59ac4..3dacac1e258 100644 --- a/storage/xtradb/handler/ha_innodb.cc +++ b/storage/xtradb/handler/ha_innodb.cc @@ -26,8 +26,8 @@ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with -this program; if not, write to the Free Software Foundation, Inc., 59 Temple -Place, Suite 330, Boston, MA 02111-1307 USA +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA *****************************************************************************/ @@ -778,6 +778,12 @@ thd_to_trx( return(*(trx_t**) thd_ha_data(thd, innodb_hton_ptr)); } +my_bool +ha_innobase::is_fake_change_enabled(THD* thd) +{ + trx_t* trx = thd_to_trx(thd); + return (trx && trx->fake_changes); +} /********************************************************************//** Call this function when mysqld passes control to the client. That is to avoid deadlocks on the adaptive hash S-latch possibly held by thd. For more @@ -924,6 +930,9 @@ convert_error_code_to_mysql( case DB_OUT_OF_FILE_SPACE: return(HA_ERR_RECORD_FILE_FULL); + case DB_TABLE_IN_FK_CHECK: + return(HA_ERR_TABLE_IN_FK_CHECK); + case DB_TABLE_IS_BEING_USED: return(HA_ERR_WRONG_COMMAND); @@ -1094,6 +1103,20 @@ innobase_get_charset( return(thd_charset((THD*) mysql_thd)); } +/**********************************************************************//** +Get the current setting of the lower_case_table_names global parameter from +mysqld.cc. We do a dirty read because for one there is no synchronization +object and secondly there is little harm in doing so even if we get a torn +read. +@return value of lower_case_table_names */ +ulint +innobase_get_lower_case_table_names(void) +/*=====================================*/ +{ + return(lower_case_table_names); +} + + /**********************************************************************//** Determines the current SQL statement. @return SQL statement string */ @@ -2634,7 +2657,6 @@ skip_overwrite: /* Get the current high water mark format. */ innobase_file_format_check = (char*) trx_sys_file_format_max_get(); - btr_search_fully_disabled = (!btr_search_enabled); DBUG_RETURN(FALSE); error: DBUG_RETURN(TRUE); @@ -3366,52 +3388,140 @@ ha_innobase::primary_key_is_clustered() return(true); } +/** Always normalize table name to lower case on Windows */ +#ifdef __WIN__ +#define normalize_table_name(norm_name, name) \ + normalize_table_name_low(norm_name, name, TRUE) +#else +#define normalize_table_name(norm_name, name) \ + normalize_table_name_low(norm_name, name, FALSE) +#endif /* __WIN__ */ + /*****************************************************************//** Normalizes a table name string. A normalized name consists of the database name catenated to '/' and table name. An example: test/mytable. On Windows normalization puts both the database name and the -table name always to lower case. */ +table name always to lower case if "set_lower_case" is set to TRUE. */ static void -normalize_table_name( -/*=================*/ +normalize_table_name_low( +/*=====================*/ char* norm_name, /*!< out: normalized name as a null-terminated string */ - const char* name) /*!< in: table name string */ + const char* name, /*!< in: table name string */ + ibool set_lower_case) /*!< in: TRUE if we want to set + name to lower case */ { char* name_ptr; char* db_ptr; + ulint db_len; char* ptr; /* Scan name from the end */ - ptr = strend(name)-1; + ptr = strend(name) - 1; + /* seek to the last path separator */ while (ptr >= name && *ptr != '\\' && *ptr != '/') { ptr--; } name_ptr = ptr + 1; - DBUG_ASSERT(ptr > name); + /* skip any number of path separators */ + while (ptr >= name && (*ptr == '\\' || *ptr == '/')) { + ptr--; + } - ptr--; + DBUG_ASSERT(ptr >= name); + /* seek to the last but one path separator or one char before + the beginning of name */ + db_len = 0; while (ptr >= name && *ptr != '\\' && *ptr != '/') { ptr--; + db_len++; } db_ptr = ptr + 1; - memcpy(norm_name, db_ptr, strlen(name) + 1 - (db_ptr - name)); + memcpy(norm_name, db_ptr, db_len); - norm_name[name_ptr - db_ptr - 1] = '/'; + norm_name[db_len] = '/'; -#ifdef __WIN__ - innobase_casedn_str(norm_name); -#endif + memcpy(norm_name + db_len + 1, name_ptr, strlen(name_ptr) + 1); + + if (set_lower_case) { + innobase_casedn_str(norm_name); + } } +#if !defined(DBUG_OFF) +/********************************************************************* +Test normalize_table_name_low(). */ +static +void +test_normalize_table_name_low() +/*===========================*/ +{ + char norm_name[128]; + const char* test_data[][2] = { + /* input, expected result */ + {"./mysqltest/t1", "mysqltest/t1"}, + {"./test/#sql-842b_2", "test/#sql-842b_2"}, + {"./test/#sql-85a3_10", "test/#sql-85a3_10"}, + {"./test/#sql2-842b-2", "test/#sql2-842b-2"}, + {"./test/bug29807", "test/bug29807"}, + {"./test/foo", "test/foo"}, + {"./test/innodb_bug52663", "test/innodb_bug52663"}, + {"./test/t", "test/t"}, + {"./test/t1", "test/t1"}, + {"./test/t10", "test/t10"}, + {"/a/b/db/table", "db/table"}, + {"/a/b/db///////table", "db/table"}, + {"/a/b////db///////table", "db/table"}, + {"/var/tmp/mysqld.1/#sql842b_2_10", "mysqld.1/#sql842b_2_10"}, + {"db/table", "db/table"}, + {"ddd/t", "ddd/t"}, + {"d/ttt", "d/ttt"}, + {"d/t", "d/t"}, + {".\\mysqltest\\t1", "mysqltest/t1"}, + {".\\test\\#sql-842b_2", "test/#sql-842b_2"}, + {".\\test\\#sql-85a3_10", "test/#sql-85a3_10"}, + {".\\test\\#sql2-842b-2", "test/#sql2-842b-2"}, + {".\\test\\bug29807", "test/bug29807"}, + {".\\test\\foo", "test/foo"}, + {".\\test\\innodb_bug52663", "test/innodb_bug52663"}, + {".\\test\\t", "test/t"}, + {".\\test\\t1", "test/t1"}, + {".\\test\\t10", "test/t10"}, + {"C:\\a\\b\\db\\table", "db/table"}, + {"C:\\a\\b\\db\\\\\\\\\\\\\\table", "db/table"}, + {"C:\\a\\b\\\\\\\\db\\\\\\\\\\\\\\table", "db/table"}, + {"C:\\var\\tmp\\mysqld.1\\#sql842b_2_10", "mysqld.1/#sql842b_2_10"}, + {"db\\table", "db/table"}, + {"ddd\\t", "ddd/t"}, + {"d\\ttt", "d/ttt"}, + {"d\\t", "d/t"}, + }; + + for (size_t i = 0; i < UT_ARR_SIZE(test_data); i++) { + printf("test_normalize_table_name_low(): " + "testing \"%s\", expected \"%s\"... ", + test_data[i][0], test_data[i][1]); + + normalize_table_name_low(norm_name, test_data[i][0], FALSE); + + if (strcmp(norm_name, test_data[i][1]) == 0) { + printf("ok\n"); + } else { + printf("got \"%s\"\n", norm_name); + ut_error; + } + } +} +#endif /* !DBUG_OFF */ + /********************************************************************//** Get the upper limit of the MySQL integral and floating-point type. @return maximum allowed value for the field */ @@ -3803,6 +3913,8 @@ ha_innobase::open( THD* thd; ulint retries = 0; char* is_part = NULL; + ibool par_case_name_set = FALSE; + char par_case_name[MAX_FULL_NAME_LEN + 1]; DBUG_ENTER("ha_innobase::open"); @@ -3855,11 +3967,16 @@ ha_innobase::open( workaround for http://bugs.mysql.com/bug.php?id=33349. Look at support issue https://support.mysql.com/view.php?id=21080 for more details. */ +#ifdef __WIN__ + is_part = strstr(norm_name, "#p#"); +#else is_part = strstr(norm_name, "#P#"); +#endif /* __WIN__ */ + retry: /* Get pointer to a table object in InnoDB dictionary cache */ ib_table = dict_table_get(norm_name, TRUE); - + if (srv_pass_corrupt_table <= 1 && ib_table && ib_table->is_corrupt) { free_share(share); my_free(upd_buff, MYF(0)); @@ -3869,15 +3986,77 @@ retry: share->ib_table = ib_table; - - - - if (NULL == ib_table) { if (is_part && retries < 10) { - ++retries; - os_thread_sleep(100000); - goto retry; + /* MySQL partition engine hard codes the file name + separator as "#P#". The text case is fixed even if + lower_case_table_names is set to 1 or 2. This is true + for sub-partition names as well. InnoDB always + normalises file names to lower case on Windows, this + can potentially cause problems when copying/moving + tables between platforms. + + 1) If boot against an installation from Windows + platform, then its partition table name could + be all be in lower case in system tables. So we + will need to check lower case name when load table. + + 2) If we boot an installation from other case + sensitive platform in Windows, we might need to + check the existence of table name without lowering + case them in the system table. */ + if (innobase_get_lower_case_table_names() == 1) { + + if (!par_case_name_set) { +#ifndef __WIN__ + /* Check for the table using lower + case name, including the partition + separator "P" */ + memcpy(par_case_name, norm_name, + strlen(norm_name)); + par_case_name[strlen(norm_name)] = 0; + innobase_casedn_str(par_case_name); +#else + /* On Windows platfrom, check + whether there exists table name in + system table whose name is + not being normalized to lower case */ + normalize_table_name_low( + par_case_name, name, FALSE); +#endif + par_case_name_set = TRUE; + } + + ib_table = dict_table_get( + par_case_name, FALSE); + } + if (!ib_table) { + ++retries; + os_thread_sleep(100000); + goto retry; + } else { +#ifndef __WIN__ + sql_print_warning("Partition table %s opened " + "after converting to lower " + "case. The table may have " + "been moved from a case " + "in-sensitive file system. " + "Please recreate table in " + "the current file system\n", + norm_name); +#else + sql_print_warning("Partition table %s opened " + "after skipping the step to " + "lower case the table name. " + "The table may have been " + "moved from a case sensitive " + "file system. Please " + "recreate table in the " + "current file system\n", + norm_name); +#endif + goto table_opened; + } } if (is_part) { @@ -3908,6 +4087,8 @@ retry: DBUG_RETURN(HA_ERR_NO_SUCH_TABLE); } +table_opened: + if (ib_table->ibd_file_missing && !thd_tablespace_op(thd)) { sql_print_error("MySQL is trying to open a table handle but " "the .ibd file for\ntable %s does not exist.\n" @@ -5178,8 +5359,7 @@ no_commit: switch (sql_command) { case SQLCOM_LOAD: - if ((trx->duplicates - & (TRX_DUP_IGNORE | TRX_DUP_REPLACE))) { + if (trx->duplicates) { goto set_max_autoinc; } @@ -5463,8 +5643,7 @@ ha_innobase::update_row( && table->next_number_field && new_row == table->record[0] && thd_sql_command(user_thd) == SQLCOM_INSERT - && (trx->duplicates & (TRX_DUP_IGNORE | TRX_DUP_REPLACE)) - == TRX_DUP_IGNORE) { + && trx->duplicates) { ulonglong auto_inc; ulonglong col_max_value; @@ -5810,6 +5989,7 @@ ha_innobase::index_read( DBUG_ENTER("index_read"); ut_a(prebuilt->trx == thd_to_trx(user_thd)); + ut_ad(key_len != 0 || find_flag != HA_READ_KEY_EXACT); ha_statistic_increment(&SSV::ha_read_key_count); @@ -5846,6 +6026,7 @@ ha_innobase::index_read( (byte*) key_ptr, (ulint) key_len, prebuilt->trx); + DBUG_ASSERT(prebuilt->search_tuple->n_fields > 0); } else { /* We position the cursor to the last or the first entry in the index */ @@ -6986,6 +7167,8 @@ ha_innobase::create( DBUG_RETURN(HA_ERR_TO_BIG_ROW); } + ut_a(strlen(name) < sizeof(name2)); + strcpy(name2, name); normalize_table_name(norm_name, name2); @@ -7418,6 +7601,11 @@ ha_innobase::delete_table( DBUG_ENTER("ha_innobase::delete_table"); + DBUG_EXECUTE_IF( + "test_normalize_table_name_low", + test_normalize_table_name_low(); + ); + /* Strangely, MySQL passes the table name without the '.frm' extension, in contrast to ::create */ normalize_table_name(norm_name, name); @@ -7715,6 +7903,7 @@ ha_innobase::records_in_range( mem_heap_t* heap; DBUG_ENTER("records_in_range"); + DBUG_ASSERT(min_key || max_key); ut_a(prebuilt->trx == thd_to_trx(ha_thd())); @@ -7760,6 +7949,9 @@ ha_innobase::records_in_range( (const uchar*) 0), (ulint) (min_key ? min_key->length : 0), prebuilt->trx); + DBUG_ASSERT(min_key + ? range_start->n_fields > 0 + : range_start->n_fields == 0); row_sel_convert_mysql_key_to_innobase( range_end, (byte*) key_val_buff2, @@ -7768,6 +7960,9 @@ ha_innobase::records_in_range( (const uchar*) 0), (ulint) (max_key ? max_key->length : 0), prebuilt->trx); + DBUG_ASSERT(max_key + ? range_end->n_fields > 0 + : range_end->n_fields == 0); mode1 = convert_search_mode_to_innobase(min_key ? min_key->flag : HA_READ_KEY_EXACT); @@ -8950,6 +9145,7 @@ ha_innobase::extra( break; case HA_EXTRA_RESET_STATE: reset_template(prebuilt); + thd_to_trx(ha_thd())->duplicates = 0; break; case HA_EXTRA_NO_KEYREAD: prebuilt->read_just_key = 0; @@ -8967,19 +9163,18 @@ ha_innobase::extra( parameters below. We must not invoke update_thd() either, because the calling threads may change. CAREFUL HERE, OR MEMORY CORRUPTION MAY OCCUR! */ - case HA_EXTRA_IGNORE_DUP_KEY: + case HA_EXTRA_INSERT_WITH_UPDATE: thd_to_trx(ha_thd())->duplicates |= TRX_DUP_IGNORE; break; + case HA_EXTRA_NO_IGNORE_DUP_KEY: + thd_to_trx(ha_thd())->duplicates &= ~TRX_DUP_IGNORE; + break; case HA_EXTRA_WRITE_CAN_REPLACE: thd_to_trx(ha_thd())->duplicates |= TRX_DUP_REPLACE; break; case HA_EXTRA_WRITE_CANNOT_REPLACE: thd_to_trx(ha_thd())->duplicates &= ~TRX_DUP_REPLACE; break; - case HA_EXTRA_NO_IGNORE_DUP_KEY: - thd_to_trx(ha_thd())->duplicates &= - ~(TRX_DUP_IGNORE | TRX_DUP_REPLACE); - break; default:/* Do nothing */ ; } @@ -11894,6 +12089,13 @@ static MYSQL_SYSVAR_ULINT(lazy_drop_table, srv_lazy_drop_table, "e.g. for http://bugs.mysql.com/51325", NULL, NULL, 0, 0, 1, 0); +#ifdef UNIV_DEBUG +static MYSQL_SYSVAR_UINT(trx_rseg_n_slots_debug, trx_rseg_n_slots_debug, + PLUGIN_VAR_RQCMDARG, + "Debug flags for InnoDB to limit TRX_RSEG_N_SLOTS for trx_rsegf_undo_find_free()", + NULL, NULL, 0, 0, 1024, 0); +#endif /* UNIV_DEBUG */ + static struct st_mysql_sys_var* innobase_system_variables[]= { MYSQL_SYSVAR(page_size), MYSQL_SYSVAR(log_block_size), @@ -11990,6 +12192,9 @@ static struct st_mysql_sys_var* innobase_system_variables[]= { MYSQL_SYSVAR(pass_corrupt_table), MYSQL_SYSVAR(lazy_drop_table), MYSQL_SYSVAR(fake_changes), +#ifdef UNIV_DEBUG + MYSQL_SYSVAR(trx_rseg_n_slots_debug), +#endif /* UNIV_DEBUG */ NULL }; diff --git a/storage/xtradb/handler/ha_innodb.h b/storage/xtradb/handler/ha_innodb.h index bfe7432b32d..1e18b3a22b9 100644 --- a/storage/xtradb/handler/ha_innodb.h +++ b/storage/xtradb/handler/ha_innodb.h @@ -136,6 +136,7 @@ class ha_innobase: public handler int close(void); double scan_time(); double read_time(uint index, uint ranges, ha_rows rows); + my_bool is_fake_change_enabled(THD *thd); bool is_corrupt() const; int write_row(uchar * buf); diff --git a/storage/xtradb/handler/handler0alter.cc b/storage/xtradb/handler/handler0alter.cc index 37fddf71cbc..5efc3f96fa3 100644 --- a/storage/xtradb/handler/handler0alter.cc +++ b/storage/xtradb/handler/handler0alter.cc @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 2005, 2010, Innobase Oy. All Rights Reserved. +Copyright (c) 2005, 2012, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -11,8 +11,8 @@ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with -this program; if not, write to the Free Software Foundation, Inc., 59 Temple -Place, Suite 330, Boston, MA 02111-1307 USA +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA *****************************************************************************/ @@ -1024,7 +1024,9 @@ ha_innobase::prepare_drop_index( goto func_exit; } + rw_lock_x_lock(dict_index_get_lock(index)); index->to_be_dropped = TRUE; + rw_lock_x_unlock(dict_index_get_lock(index)); } /* If FOREIGN_KEY_CHECKS = 1 you may not drop an index defined @@ -1143,7 +1145,9 @@ func_exit: = dict_table_get_first_index(prebuilt->table); do { + rw_lock_x_lock(dict_index_get_lock(index)); index->to_be_dropped = FALSE; + rw_lock_x_unlock(dict_index_get_lock(index)); index = dict_table_get_next_index(index); } while (index); } @@ -1209,7 +1213,9 @@ ha_innobase::final_drop_index( for (index = dict_table_get_first_index(prebuilt->table); index; index = dict_table_get_next_index(index)) { + rw_lock_x_lock(dict_index_get_lock(index)); index->to_be_dropped = FALSE; + rw_lock_x_unlock(dict_index_get_lock(index)); } goto func_exit; diff --git a/storage/xtradb/handler/i_s.cc b/storage/xtradb/handler/i_s.cc index fc7cd1c9b8f..b6e7da50bcf 100644 --- a/storage/xtradb/handler/i_s.cc +++ b/storage/xtradb/handler/i_s.cc @@ -768,7 +768,7 @@ i_s_innodb_buffer_pool_pages_index_fill( table->field[2]->store(block->page.offset); table->field[3]->store(page_get_n_recs(frame)); table->field[4]->store(page_get_data_size(frame)); - table->field[5]->store(block->is_hashed); + table->field[5]->store(block->index != NULL); /* is_hashed */ table->field[6]->store(block->page.access_time); table->field[7]->store(block->page.newest_modification != 0); table->field[8]->store(block->page.oldest_modification != 0); diff --git a/storage/xtradb/ibuf/ibuf0ibuf.c b/storage/xtradb/ibuf/ibuf0ibuf.c index 64dc9a5591d..ee9b85fa38c 100644 --- a/storage/xtradb/ibuf/ibuf0ibuf.c +++ b/storage/xtradb/ibuf/ibuf0ibuf.c @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1997, 2009, Innobase Oy. All Rights Reserved. +Copyright (c) 1997, 2012, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -11,8 +11,8 @@ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with -this program; if not, write to the Free Software Foundation, Inc., 59 Temple -Place, Suite 330, Boston, MA 02111-1307 USA +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA *****************************************************************************/ @@ -356,7 +356,7 @@ ibuf_tree_root_get( block = buf_page_get( IBUF_SPACE_ID, 0, FSP_IBUF_TREE_ROOT_PAGE_NO, RW_X_LATCH, mtr); - buf_block_dbg_add_level(block, SYNC_TREE_NODE); + buf_block_dbg_add_level(block, SYNC_IBUF_TREE_NODE); return(buf_block_get_frame(block)); } @@ -498,7 +498,7 @@ ibuf_init_at_db_start(void) block = buf_page_get( IBUF_SPACE_ID, 0, FSP_IBUF_TREE_ROOT_PAGE_NO, RW_X_LATCH, &mtr); - buf_block_dbg_add_level(block, SYNC_TREE_NODE); + buf_block_dbg_add_level(block, SYNC_IBUF_TREE_NODE); root = buf_block_get_frame(block); } @@ -1725,14 +1725,14 @@ ulint ibuf_add_free_page(void) /*====================*/ { - mtr_t mtr; - page_t* header_page; - ulint flags; - ulint zip_size; - ulint page_no; - page_t* page; - page_t* root; - page_t* bitmap_page; + mtr_t mtr; + page_t* header_page; + ulint flags; + ulint zip_size; + buf_block_t* block; + page_t* page; + page_t* root; + page_t* bitmap_page; mtr_start(&mtr); @@ -1753,34 +1753,24 @@ ibuf_add_free_page(void) of a deadlock. This is the reason why we created a special ibuf header page apart from the ibuf tree. */ - page_no = fseg_alloc_free_page( + block = fseg_alloc_free_page( header_page + IBUF_HEADER + IBUF_TREE_SEG_HEADER, 0, FSP_UP, &mtr); - if (page_no == FIL_NULL) { + if (block == NULL) { mtr_commit(&mtr); return(DB_STRONG_FAIL); } - { - buf_block_t* block; - - block = buf_page_get( - IBUF_SPACE_ID, 0, page_no, RW_X_LATCH, &mtr); - - buf_block_dbg_add_level(block, SYNC_TREE_NODE_NEW); - - - page = buf_block_get_frame(block); - } - + ut_ad(rw_lock_get_x_lock_count(&block->lock) == 1); ibuf_enter(); - mutex_enter(&ibuf_mutex); - root = ibuf_tree_root_get(&mtr); + buf_block_dbg_add_level(block, SYNC_IBUF_TREE_NODE_NEW); + page = buf_block_get_frame(block); + /* Add the page to the free list and update the ibuf size data */ flst_add_last(root + PAGE_HEADER + PAGE_BTR_IBUF_FREE_LIST, @@ -1796,10 +1786,11 @@ ibuf_add_free_page(void) (level 2 page) */ bitmap_page = ibuf_bitmap_get_map_page( - IBUF_SPACE_ID, page_no, zip_size, &mtr); + IBUF_SPACE_ID, buf_block_get_page_no(block), zip_size, &mtr); ibuf_bitmap_page_set_bits( - bitmap_page, page_no, zip_size, IBUF_BITMAP_IBUF, TRUE, &mtr); + bitmap_page, buf_block_get_page_no(block), zip_size, + IBUF_BITMAP_IBUF, TRUE, &mtr); mtr_commit(&mtr); @@ -1900,8 +1891,7 @@ ibuf_remove_free_page(void) block = buf_page_get( IBUF_SPACE_ID, 0, page_no, RW_X_LATCH, &mtr); - buf_block_dbg_add_level(block, SYNC_TREE_NODE); - + buf_block_dbg_add_level(block, SYNC_IBUF_TREE_NODE); page = buf_block_get_frame(block); } @@ -2095,7 +2085,15 @@ ibuf_get_merge_page_nos( } else { rec_page_no = ibuf_rec_get_page_no(rec); rec_space_id = ibuf_rec_get_space(rec); - ut_ad(rec_page_no > IBUF_TREE_ROOT_PAGE_NO); + /* In the system tablespace, the smallest + possible secondary index leaf page number is + bigger than IBUF_TREE_ROOT_PAGE_NO (4). In + other tablespaces, the clustered index tree is + created at page 3, which makes page 4 the + smallest possible secondary index leaf page + (and that only after DROP INDEX). */ + ut_ad(rec_page_no + > IBUF_TREE_ROOT_PAGE_NO - (rec_space_id != 0)); } #ifdef UNIV_IBUF_DEBUG @@ -2413,7 +2411,7 @@ ibuf_get_volume_buffered( block = buf_page_get( IBUF_SPACE_ID, 0, prev_page_no, RW_X_LATCH, mtr); - buf_block_dbg_add_level(block, SYNC_TREE_NODE); + buf_block_dbg_add_level(block, SYNC_IBUF_TREE_NODE); prev_page = buf_block_get_frame(block); @@ -2487,7 +2485,7 @@ count_later: block = buf_page_get( IBUF_SPACE_ID, 0, next_page_no, RW_X_LATCH, mtr); - buf_block_dbg_add_level(block, SYNC_TREE_NODE); + buf_block_dbg_add_level(block, SYNC_IBUF_TREE_NODE); next_page = buf_block_get_frame(block); @@ -2980,7 +2978,7 @@ ibuf_insert_to_index_page( ut_ad(ibuf_inside()); ut_ad(dtuple_check_typed(entry)); - ut_ad(!buf_block_align(page)->is_hashed); + ut_ad(!buf_block_align(page)->index); if (UNIV_UNLIKELY(dict_table_is_comp(index->table) != (ibool)!!page_is_comp(page))) { @@ -3255,6 +3253,7 @@ ibuf_merge_or_delete_for_page( ut_ad(!block || buf_block_get_space(block) == space); ut_ad(!block || buf_block_get_page_no(block) == page_no); ut_ad(!block || buf_block_get_zip_size(block) == zip_size); + ut_ad(!block || buf_block_get_io_fix(block) == BUF_IO_READ); if (srv_force_recovery >= SRV_FORCE_NO_IBUF_MERGE || trx_sys_hdr_page(space, page_no)) { @@ -3289,7 +3288,7 @@ ibuf_merge_or_delete_for_page( function. When the counter is > 0, that prevents tablespace from being dropped. */ - tablespace_being_deleted = fil_inc_pending_ibuf_merges(space); + tablespace_being_deleted = fil_inc_pending_ops(space); if (UNIV_UNLIKELY(tablespace_being_deleted)) { /* Do not try to read the bitmap page from space; @@ -3313,7 +3312,7 @@ ibuf_merge_or_delete_for_page( mtr_commit(&mtr); if (!tablespace_being_deleted) { - fil_decr_pending_ibuf_merges(space); + fil_decr_pending_ops(space); } return; @@ -3410,7 +3409,13 @@ loop: ut_a(success); - buf_block_dbg_add_level(block, SYNC_TREE_NODE); + /* This is a user page (secondary index leaf page), + but we pretend that it is a change buffer page in + order to obey the latching order. This should be OK, + because buffered changes are applied immediately while + the block is io-fixed. Other threads must not try to + latch an io-fixed block. */ + buf_block_dbg_add_level(block, SYNC_IBUF_TREE_NODE); } /* Position pcur in the insert buffer at the first entry for this @@ -3539,7 +3544,7 @@ reset_bit: if (update_ibuf_bitmap && !tablespace_being_deleted) { - fil_decr_pending_ibuf_merges(space); + fil_decr_pending_ops(space); } ibuf_exit(); diff --git a/storage/xtradb/include/btr0btr.h b/storage/xtradb/include/btr0btr.h index 1fe40965c0f..827f81eab97 100644 --- a/storage/xtradb/include/btr0btr.h +++ b/storage/xtradb/include/btr0btr.h @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1994, 2011, Oracle and/or its affiliates. All Rights Reserved. +Copyright (c) 1994, 2012, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -11,8 +11,8 @@ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with -this program; if not, write to the Free Software Foundation, Inc., 59 Temple -Place, Suite 330, Boston, MA 02111-1307 USA +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA *****************************************************************************/ @@ -188,26 +188,45 @@ btr_block_get_func( ulint mode, /*!< in: latch mode */ const char* file, /*!< in: file name */ ulint line, /*!< in: line where called */ - mtr_t* mtr) /*!< in/out: mtr */ - __attribute__((nonnull)); +# ifdef UNIV_SYNC_DEBUG + const dict_index_t* index, /*!< in: index tree, may be NULL + if it is not an insert buffer tree */ +# endif /* UNIV_SYNC_DEBUG */ + mtr_t* mtr); /*!< in/out: mini-transaction */ +# ifdef UNIV_SYNC_DEBUG /** Gets a buffer page and declares its latching order level. @param space tablespace identifier @param zip_size compressed page size in bytes or 0 for uncompressed pages @param page_no page number @param mode latch mode +@param index index tree, may be NULL if not the insert buffer tree @param mtr mini-transaction handle @return the block descriptor */ -# define btr_block_get(space,zip_size,page_no,mode,mtr) \ - btr_block_get_func(space,zip_size,page_no,mode,__FILE__,__LINE__,mtr) +# define btr_block_get(space,zip_size,page_no,mode,index,mtr) \ + btr_block_get_func(space,zip_size,page_no,mode, \ + __FILE__,__LINE__,index,mtr) +# else /* UNIV_SYNC_DEBUG */ /** Gets a buffer page and declares its latching order level. @param space tablespace identifier @param zip_size compressed page size in bytes or 0 for uncompressed pages @param page_no page number @param mode latch mode +@param idx index tree, may be NULL if not the insert buffer tree +@param mtr mini-transaction handle +@return the block descriptor */ +# define btr_block_get(space,zip_size,page_no,mode,idx,mtr) \ + btr_block_get_func(space,zip_size,page_no,mode,__FILE__,__LINE__,mtr) +# endif /* UNIV_SYNC_DEBUG */ +/** Gets a buffer page and declares its latching order level. +@param space tablespace identifier +@param zip_size compressed page size in bytes or 0 for uncompressed pages +@param page_no page number +@param mode latch mode +@param idx index tree, may be NULL if not the insert buffer tree @param mtr mini-transaction handle @return the uncompressed page frame */ -# define btr_page_get(space,zip_size,page_no,mode,mtr) \ - buf_block_get_frame(btr_block_get(space,zip_size,page_no,mode,mtr)) +# define btr_page_get(space,zip_size,page_no,mode,idx,mtr) \ + buf_block_get_frame(btr_block_get(space,zip_size,page_no,mode,idx,mtr)) /**************************************************************//** Sets the index id field of a page. */ UNIV_INLINE @@ -378,8 +397,7 @@ btr_free_root( ulint zip_size, /*!< in: compressed page size in bytes or 0 for uncompressed pages */ ulint root_page_no, /*!< in: root page number */ - mtr_t* mtr); /*!< in: a mini-transaction which has already - been started */ + mtr_t* mtr); /*!< in/out: mini-transaction */ /*************************************************************//** Makes tree one level higher by splitting the root, and inserts the tuple. It is assumed that mtr contains an x-latch on the tree. @@ -588,17 +606,23 @@ btr_parse_page_reorganize( #ifndef UNIV_HOTBACKUP /**************************************************************//** Gets the number of pages in a B-tree. -@return number of pages */ +@return number of pages, or ULINT_UNDEFINED if the index is unavailable */ UNIV_INTERN ulint btr_get_size( /*=========*/ dict_index_t* index, /*!< in: index */ - ulint flag); /*!< in: BTR_N_LEAF_PAGES or BTR_TOTAL_SIZE */ + ulint flag, /*!< in: BTR_N_LEAF_PAGES or BTR_TOTAL_SIZE */ + mtr_t* mtr) /*!< in/out: mini-transaction where index + is s-latched */ + __attribute__((nonnull, warn_unused_result)); /**************************************************************//** Allocates a new file page to be used in an index tree. NOTE: we assume that the caller has made the reservation for free extents! -@return new allocated block, x-latched; NULL if out of space */ +@retval NULL if no page could be allocated +@retval block, rw_lock_x_lock_count(&block->lock) == 1 if allocation succeeded +(init_mtr == mtr, or the page was not previously freed in mtr) +@retval block (not allocated or initialized) otherwise */ UNIV_INTERN buf_block_t* btr_page_alloc( @@ -609,7 +633,12 @@ btr_page_alloc( page split is made */ ulint level, /*!< in: level where the page is placed in the tree */ - mtr_t* mtr); /*!< in: mtr */ + mtr_t* mtr, /*!< in/out: mini-transaction + for the allocation */ + mtr_t* init_mtr) /*!< in/out: mini-transaction + for x-latching and initializing + the page */ + __attribute__((nonnull, warn_unused_result)); /**************************************************************//** Frees a file page used in an index tree. NOTE: cannot free field external storage pages because the page must contain info on its level. */ diff --git a/storage/xtradb/include/btr0btr.ic b/storage/xtradb/include/btr0btr.ic index e19c863300a..d729a58f9c7 100644 --- a/storage/xtradb/include/btr0btr.ic +++ b/storage/xtradb/include/btr0btr.ic @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1994, 2010, Innobase Oy. All Rights Reserved. +Copyright (c) 1994, 2011, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -48,6 +48,10 @@ btr_block_get_func( ulint mode, /*!< in: latch mode */ const char* file, /*!< in: file name */ ulint line, /*!< in: line where called */ +#ifdef UNIV_SYNC_DEBUG + const dict_index_t* index, /*!< in: index tree, may be NULL + if it is not an insert buffer tree */ +#endif /* UNIV_SYNC_DEBUG */ mtr_t* mtr) /*!< in/out: mtr */ { buf_block_t* block; @@ -59,7 +63,9 @@ btr_block_get_func( if (block && mode != RW_NO_LATCH) { - buf_block_dbg_add_level(block, SYNC_TREE_NODE); + buf_block_dbg_add_level( + block, index != NULL && dict_index_is_ibuf(index) + ? SYNC_IBUF_TREE_NODE : SYNC_TREE_NODE); } return(block); diff --git a/storage/xtradb/include/btr0cur.h b/storage/xtradb/include/btr0cur.h index 6f4ce95d72f..a8ec0a88867 100644 --- a/storage/xtradb/include/btr0cur.h +++ b/storage/xtradb/include/btr0cur.h @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1994, 2011, Oracle and/or its affiliates. All Rights Reserved. +Copyright (c) 1994, 2012, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -11,8 +11,8 @@ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with -this program; if not, write to the Free Software Foundation, Inc., 59 Temple -Place, Suite 330, Boston, MA 02111-1307 USA +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA *****************************************************************************/ @@ -326,16 +326,6 @@ btr_cur_pessimistic_update( que_thr_t* thr, /*!< in: query thread */ mtr_t* mtr); /*!< in: mtr; must be committed before latching any further pages */ -/***************************************************************** -Commits and restarts a mini-transaction so that it will retain an -x-lock on index->lock and the cursor page. */ -UNIV_INTERN -void -btr_cur_mtr_commit_and_start( -/*=========================*/ - btr_cur_t* cursor, /*!< in: cursor */ - mtr_t* mtr) /*!< in/out: mini-transaction */ - __attribute__((nonnull)); /***********************************************************//** Marks a clustered index record deleted. Writes an undo log record to undo log on this delete marking. Writes in the trx id field the id @@ -522,6 +512,27 @@ btr_cur_disown_inherited_fields( const upd_t* update, /*!< in: update vector */ mtr_t* mtr) /*!< in/out: mini-transaction */ __attribute__((nonnull(2,3,4,5,6))); + +/** Operation code for btr_store_big_rec_extern_fields(). */ +enum blob_op { + /** Store off-page columns for a freshly inserted record */ + BTR_STORE_INSERT = 0, + /** Store off-page columns for an insert by update */ + BTR_STORE_INSERT_UPDATE, + /** Store off-page columns for an update */ + BTR_STORE_UPDATE +}; + +/*******************************************************************//** +Determine if an operation on off-page columns is an update. +@return TRUE if op != BTR_STORE_INSERT */ +UNIV_INLINE +ibool +btr_blob_op_is_update( +/*==================*/ + enum blob_op op) /*!< in: operation */ + __attribute__((warn_unused_result)); + /*******************************************************************//** Stores the fields in big_rec_vec to the tablespace and puts pointers to them in rec. The extern flags in rec will have to be set beforehand. @@ -529,52 +540,23 @@ The fields are stored on pages allocated from leaf node file segment of the index tree. @return DB_SUCCESS or DB_OUT_OF_FILE_SPACE */ UNIV_INTERN -ulint -btr_store_big_rec_extern_fields_func( -/*=================================*/ +enum db_err +btr_store_big_rec_extern_fields( +/*============================*/ dict_index_t* index, /*!< in: index of rec; the index tree MUST be X-latched */ buf_block_t* rec_block, /*!< in/out: block containing rec */ - rec_t* rec, /*!< in: record */ + rec_t* rec, /*!< in/out: record */ const ulint* offsets, /*!< in: rec_get_offsets(rec, index); the "external storage" flags in offsets will not correspond to rec when this function returns */ -#ifdef UNIV_DEBUG - mtr_t* local_mtr, /*!< in: mtr containing the - latch to rec and to the tree */ -#endif /* UNIV_DEBUG */ -#if defined UNIV_DEBUG || defined UNIV_BLOB_LIGHT_DEBUG - ibool update_in_place,/*! in: TRUE if the record is updated - in place (not delete+insert) */ -#endif /* UNIV_DEBUG || UNIV_BLOB_LIGHT_DEBUG */ - const big_rec_t*big_rec_vec) /*!< in: vector containing fields + const big_rec_t*big_rec_vec, /*!< in: vector containing fields to be stored externally */ - __attribute__((nonnull)); - -/** Stores the fields in big_rec_vec to the tablespace and puts pointers to -them in rec. The extern flags in rec will have to be set beforehand. -The fields are stored on pages allocated from leaf node -file segment of the index tree. -@param index in: clustered index; MUST be X-latched by mtr -@param b in/out: block containing rec; MUST be X-latched by mtr -@param rec in/out: clustered index record -@param offsets in: rec_get_offsets(rec, index); - the "external storage" flags in offsets will not be adjusted -@param mtr in: mini-transaction that holds x-latch on index and b -@param upd in: TRUE if the record is updated in place (not delete+insert) -@param big in: vector containing fields to be stored externally -@return DB_SUCCESS or DB_OUT_OF_FILE_SPACE */ -#ifdef UNIV_DEBUG -# define btr_store_big_rec_extern_fields(index,b,rec,offsets,mtr,upd,big) \ - btr_store_big_rec_extern_fields_func(index,b,rec,offsets,mtr,upd,big) -#elif defined UNIV_BLOB_LIGHT_DEBUG -# define btr_store_big_rec_extern_fields(index,b,rec,offsets,mtr,upd,big) \ - btr_store_big_rec_extern_fields_func(index,b,rec,offsets,upd,big) -#else -# define btr_store_big_rec_extern_fields(index,b,rec,offsets,mtr,upd,big) \ - btr_store_big_rec_extern_fields_func(index,b,rec,offsets,big) -#endif + mtr_t* btr_mtr, /*!< in: mtr containing the + latches to the clustered index */ + enum blob_op op) /*! in: operation code */ + __attribute__((nonnull, warn_unused_result)); /*******************************************************************//** Frees the space in an externally stored field to the file space diff --git a/storage/xtradb/include/btr0cur.ic b/storage/xtradb/include/btr0cur.ic index c833b3e8572..e31f77c77eb 100644 --- a/storage/xtradb/include/btr0cur.ic +++ b/storage/xtradb/include/btr0cur.ic @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1994, 2011, Oracle and/or its affiliates. All Rights Reserved. +Copyright (c) 1994, 2012, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -11,8 +11,8 @@ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with -this program; if not, write to the Free Software Foundation, Inc., 59 Temple -Place, Suite 330, Boston, MA 02111-1307 USA +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA *****************************************************************************/ @@ -139,7 +139,7 @@ btr_cur_compress_recommendation( btr_cur_t* cursor, /*!< in: btr cursor */ mtr_t* mtr) /*!< in: mtr */ { - const page_t* page; + const page_t* page; ut_ad(mtr_memo_contains(mtr, btr_cur_get_block(cursor), MTR_MEMO_PAGE_X_FIX)); @@ -197,4 +197,25 @@ btr_cur_can_delete_without_compress( return(TRUE); } + +/*******************************************************************//** +Determine if an operation on off-page columns is an update. +@return TRUE if op != BTR_STORE_INSERT */ +UNIV_INLINE +ibool +btr_blob_op_is_update( +/*==================*/ + enum blob_op op) /*!< in: operation */ +{ + switch (op) { + case BTR_STORE_INSERT: + return(FALSE); + case BTR_STORE_INSERT_UPDATE: + case BTR_STORE_UPDATE: + return(TRUE); + } + + ut_ad(0); + return(FALSE); +} #endif /* !UNIV_HOTBACKUP */ diff --git a/storage/xtradb/include/btr0pcur.h b/storage/xtradb/include/btr0pcur.h index f59514d04b3..40ecc77dcd1 100644 --- a/storage/xtradb/include/btr0pcur.h +++ b/storage/xtradb/include/btr0pcur.h @@ -279,14 +279,6 @@ btr_pcur_commit_specify_mtr( /*========================*/ btr_pcur_t* pcur, /*!< in: persistent cursor */ mtr_t* mtr); /*!< in: mtr to commit */ -/**************************************************************//** -Tests if a cursor is detached: that is the latch mode is BTR_NO_LATCHES. -@return TRUE if detached */ -UNIV_INLINE -ibool -btr_pcur_is_detached( -/*=================*/ - btr_pcur_t* pcur); /*!< in: persistent cursor */ /*********************************************************//** Moves the persistent cursor to the next record in the tree. If no records are left, the cursor stays 'after last in tree'. diff --git a/storage/xtradb/include/btr0pcur.ic b/storage/xtradb/include/btr0pcur.ic index 0f9b969e7c5..f49e155f97e 100644 --- a/storage/xtradb/include/btr0pcur.ic +++ b/storage/xtradb/include/btr0pcur.ic @@ -415,38 +415,6 @@ btr_pcur_commit_specify_mtr( pcur->pos_state = BTR_PCUR_WAS_POSITIONED; } -/**************************************************************//** -Sets the pcur latch mode to BTR_NO_LATCHES. */ -UNIV_INLINE -void -btr_pcur_detach( -/*============*/ - btr_pcur_t* pcur) /*!< in: persistent cursor */ -{ - ut_a(pcur->pos_state == BTR_PCUR_IS_POSITIONED); - - pcur->latch_mode = BTR_NO_LATCHES; - - pcur->pos_state = BTR_PCUR_WAS_POSITIONED; -} - -/**************************************************************//** -Tests if a cursor is detached: that is the latch mode is BTR_NO_LATCHES. -@return TRUE if detached */ -UNIV_INLINE -ibool -btr_pcur_is_detached( -/*=================*/ - btr_pcur_t* pcur) /*!< in: persistent cursor */ -{ - if (pcur->latch_mode == BTR_NO_LATCHES) { - - return(TRUE); - } - - return(FALSE); -} - /**************************************************************//** Sets the old_rec_buf field to NULL. */ UNIV_INLINE diff --git a/storage/xtradb/include/btr0sea.h b/storage/xtradb/include/btr0sea.h index f6d194319ae..9281be63f67 100644 --- a/storage/xtradb/include/btr0sea.h +++ b/storage/xtradb/include/btr0sea.h @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1996, 2009, Innobase Oy. All Rights Reserved. +Copyright (c) 1996, 2011, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -148,8 +148,8 @@ btr_search_drop_page_hash_index_on_index( /*=====================================*/ dict_index_t* index); /* in: record descriptor */ /********************************************************************//** -Drops a page hash index when a page is freed from a fseg to the file system. -Drops possible hash index if the page happens to be in the buffer pool. */ +Drops a possible page hash index when a page is evicted from the buffer pool +or freed in a file segment. */ UNIV_INTERN void btr_search_drop_page_hash_when_freed( @@ -199,16 +199,6 @@ btr_search_validate(void); # define btr_search_validate() TRUE #endif /* defined UNIV_AHI_DEBUG || defined UNIV_DEBUG */ -/** Flag: has the search system been enabled? -Protected by btr_search_latch and btr_search_enabled_mutex. */ -extern char btr_search_enabled; - -/** Flag: whether the search system has completed its disabling process, -It is set to TRUE right after buf_pool_drop_hash_index() in -btr_search_disable(), indicating hash index entries are cleaned up. -Protected by btr_search_latch and btr_search_enabled_mutex. */ -extern ibool btr_search_fully_disabled; - /** The search info struct in an index */ struct btr_search_struct{ ulint ref_count; /*!< Number of blocks in this index tree @@ -277,24 +267,6 @@ struct btr_search_sys_struct{ /** The adaptive hash index */ extern btr_search_sys_t* btr_search_sys; -/** @brief The latch protecting the adaptive search system - -This latch protects the -(1) hash index; -(2) columns of a record to which we have a pointer in the hash index; - -but does NOT protect: - -(3) next record offset field in a record; -(4) next or previous records on the same page. - -Bear in mind (3) and (4) when using the hash index. -*/ -extern rw_lock_t* btr_search_latch_temp; - -/** The latch protecting the adaptive search system */ -#define btr_search_latch (*btr_search_latch_temp) - #ifdef UNIV_SEARCH_PERF_STAT /** Number of successful adaptive hash index lookups */ extern ulint btr_search_n_succ; diff --git a/storage/xtradb/include/btr0types.h b/storage/xtradb/include/btr0types.h index 07c06fb18d7..5adc858b931 100644 --- a/storage/xtradb/include/btr0types.h +++ b/storage/xtradb/include/btr0types.h @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1996, 2009, Innobase Oy. All Rights Reserved. +Copyright (c) 1996, 2011, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -30,6 +30,7 @@ Created 2/17/1996 Heikki Tuuri #include "rem0types.h" #include "page0types.h" +#include "sync0rw.h" /** Persistent cursor */ typedef struct btr_pcur_struct btr_pcur_t; @@ -38,6 +39,28 @@ typedef struct btr_cur_struct btr_cur_t; /** B-tree search information for the adaptive hash index */ typedef struct btr_search_struct btr_search_t; +/** @brief The latch protecting the adaptive search system + +This latch protects the +(1) hash index; +(2) columns of a record to which we have a pointer in the hash index; + +but does NOT protect: + +(3) next record offset field in a record; +(4) next or previous records on the same page. + +Bear in mind (3) and (4) when using the hash index. +*/ +extern rw_lock_t* btr_search_latch_temp; + +/** The latch protecting the adaptive search system */ +#define btr_search_latch (*btr_search_latch_temp) + +/** Flag: has the search system been enabled? +Protected by btr_search_latch. */ +extern char btr_search_enabled; + #ifdef UNIV_BLOB_DEBUG # include "buf0types.h" /** An index->blobs entry for keeping track of off-page column references */ diff --git a/storage/xtradb/include/buf0buf.h b/storage/xtradb/include/buf0buf.h index 838dd7f3900..e3039fe520c 100644 --- a/storage/xtradb/include/buf0buf.h +++ b/storage/xtradb/include/buf0buf.h @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1995, 2011, Oracle and/or its affiliates. All Rights Reserved. +Copyright (c) 1995, 2012, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -11,8 +11,8 @@ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with -this program; if not, write to the Free Software Foundation, Inc., 59 Temple -Place, Suite 330, Boston, MA 02111-1307 USA +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA *****************************************************************************/ @@ -120,13 +120,11 @@ buf_pool_free(void); /*===============*/ /********************************************************************//** -Drops the adaptive hash index. To prevent a livelock, this function -is only to be called while holding btr_search_latch and while -btr_search_enabled == FALSE. */ +Clears the adaptive hash index on all pages in the buffer pool. */ UNIV_INTERN void -buf_pool_drop_hash_index(void); -/*==========================*/ +buf_pool_clear_hash_index(void); +/*===========================*/ /********************************************************************//** Relocate a buffer control block. Relocates the block on the LRU list @@ -372,15 +370,6 @@ buf_page_peek( /*==========*/ ulint space, /*!< in: space id */ ulint offset);/*!< in: page number */ -/********************************************************************//** -Resets the check_index_page_at_flush field of a page if found in the buffer -pool. */ -UNIV_INTERN -void -buf_reset_check_index_page_at_flush( -/*================================*/ - ulint space, /*!< in: space id */ - ulint offset);/*!< in: page number */ #if defined UNIV_DEBUG_FILE_ACCESSES || defined UNIV_DEBUG /********************************************************************//** Sets file_page_was_freed TRUE if the page is found in the buffer pool. @@ -449,17 +438,6 @@ buf_page_peek_if_too_old( /*=====================*/ const buf_page_t* bpage); /*!< in: block to make younger */ /********************************************************************//** -Returns the current state of is_hashed of a page. FALSE if the page is -not in the pool. NOTE that this operation does not fix the page in the -pool if it is found there. -@return TRUE if page hash index is built in search system */ -UNIV_INTERN -ibool -buf_page_peek_if_search_hashed( -/*===========================*/ - ulint space, /*!< in: space id */ - ulint offset);/*!< in: page number */ -/********************************************************************//** Gets the youngest modification log sequence number for a frame. Returns zero if not file page or no modification occurred yet. @return newest modification to page */ @@ -1296,13 +1274,16 @@ struct buf_block_struct{ /* @} */ /** @name Hash search fields - These 6 fields may only be modified when we have + These 5 fields may only be modified when we have an x-latch on btr_search_latch AND - we are holding an s-latch or x-latch on buf_block_struct::lock or - we know that buf_block_struct::buf_fix_count == 0. An exception to this is when we init or create a page - in the buffer pool in buf0buf.c. */ + in the buffer pool in buf0buf.c. + + Another exception is that assigning block->index = NULL + is allowed whenever holding an x-latch on btr_search_latch. */ /* @{ */ @@ -1311,20 +1292,20 @@ struct buf_block_struct{ pointers in the adaptive hash index pointing to this frame */ #endif /* UNIV_AHI_DEBUG || UNIV_DEBUG */ - unsigned is_hashed:1; /*!< TRUE if hash index has - already been built on this - page; note that it does not - guarantee that the index is - complete, though: there may - have been hash collisions, - record deletions, etc. */ unsigned curr_n_fields:10;/*!< prefix length for hash indexing: number of full fields */ unsigned curr_n_bytes:15;/*!< number of bytes in hash indexing */ unsigned curr_left_side:1;/*!< TRUE or FALSE in hash indexing */ - dict_index_t* index; /*!< Index for which the adaptive - hash index has been created. */ + dict_index_t* index; /*!< Index for which the + adaptive hash index has been + created, or NULL if the page + does not exist in the + index. Note that it does not + guarantee that the index is + complete, though: there may + have been hash collisions, + record deletions, etc. */ /* @} */ # ifdef UNIV_SYNC_DEBUG /** @name Debug fields */ diff --git a/storage/xtradb/include/buf0buf.ic b/storage/xtradb/include/buf0buf.ic index a081d6a34c0..92e0edf0444 100644 --- a/storage/xtradb/include/buf0buf.ic +++ b/storage/xtradb/include/buf0buf.ic @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1995, 2011, Oracle and/or its affiliates. All Rights Reserved. +Copyright (c) 1995, 2012, Oracle and/or its affiliates. All Rights Reserved. Copyright (c) 2008, Google Inc. Portions of this file contain modifications contributed and copyrighted by @@ -18,8 +18,8 @@ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with -this program; if not, write to the Free Software Foundation, Inc., 59 Temple -Place, Suite 330, Boston, MA 02111-1307 USA +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA *****************************************************************************/ diff --git a/storage/xtradb/include/db0err.h b/storage/xtradb/include/db0err.h index c7fa6d2a444..e4a3844cd22 100644 --- a/storage/xtradb/include/db0err.h +++ b/storage/xtradb/include/db0err.h @@ -97,6 +97,8 @@ enum db_err { DB_FOREIGN_EXCEED_MAX_CASCADE, /* Foreign key constraint related cascading delete/update exceeds maximum allowed depth */ + DB_TABLE_IN_FK_CHECK, /* table is being used in foreign + key check */ /* The following are partial failure codes */ DB_FAIL = 1000, diff --git a/storage/xtradb/include/dict0dict.h b/storage/xtradb/include/dict0dict.h index 2baecdc958a..be8bd20dba9 100644 --- a/storage/xtradb/include/dict0dict.h +++ b/storage/xtradb/include/dict0dict.h @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1996, 2009, Innobase Oy. All Rights Reserved. +Copyright (c) 1996, 2012, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -11,8 +11,8 @@ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with -this program; if not, write to the Free Software Foundation, Inc., 59 Temple -Place, Suite 330, Boston, MA 02111-1307 USA +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA *****************************************************************************/ @@ -1018,14 +1018,6 @@ dict_index_get_page( /*================*/ const dict_index_t* tree); /*!< in: index */ /*********************************************************************//** -Sets the page number of the root of index tree. */ -UNIV_INLINE -void -dict_index_set_page( -/*================*/ - dict_index_t* index, /*!< in/out: index */ - ulint page); /*!< in: page number */ -/*********************************************************************//** Gets the read-write lock of the index tree. @return read-write lock */ UNIV_INLINE diff --git a/storage/xtradb/include/dict0dict.ic b/storage/xtradb/include/dict0dict.ic index bd7534dc7e2..1c1c3d7f202 100644 --- a/storage/xtradb/include/dict0dict.ic +++ b/storage/xtradb/include/dict0dict.ic @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1996, 2009, Innobase Oy. All Rights Reserved. +Copyright (c) 1996, 2012, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -11,8 +11,8 @@ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with -this program; if not, write to the Free Software Foundation, Inc., 59 Temple -Place, Suite 330, Boston, MA 02111-1307 USA +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA *****************************************************************************/ @@ -722,21 +722,6 @@ dict_index_get_page( return(index->page); } -/*********************************************************************//** -Sets the page number of the root of index tree. */ -UNIV_INLINE -void -dict_index_set_page( -/*================*/ - dict_index_t* index, /*!< in/out: index */ - ulint page) /*!< in: page number */ -{ - ut_ad(index); - ut_ad(index->magic_n == DICT_INDEX_MAGIC_N); - - index->page = page; -} - /*********************************************************************//** Gets the read-write lock of the index tree. @return read-write lock */ diff --git a/storage/xtradb/include/dict0mem.h b/storage/xtradb/include/dict0mem.h index 3554274847c..a729ed8816f 100644 --- a/storage/xtradb/include/dict0mem.h +++ b/storage/xtradb/include/dict0mem.h @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1996, 2009, Innobase Oy. All Rights Reserved. +Copyright (c) 1996, 2012, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -11,8 +11,8 @@ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with -this program; if not, write to the Free Software Foundation, Inc., 59 Temple -Place, Suite 330, Boston, MA 02111-1307 USA +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA *****************************************************************************/ @@ -305,7 +305,9 @@ struct dict_index_struct{ unsigned to_be_dropped:1; /*!< TRUE if this index is marked to be dropped in ha_innobase::prepare_drop_index(), - otherwise FALSE */ + otherwise FALSE. Protected by + dict_sys->mutex, dict_operation_lock and + index->lock.*/ dict_field_t* fields; /*!< array of field descriptions */ #ifndef UNIV_HOTBACKUP UT_LIST_NODE_T(dict_index_t) diff --git a/storage/xtradb/include/fil0fil.h b/storage/xtradb/include/fil0fil.h index 11c4cb4ba03..d3300b6b8aa 100644 --- a/storage/xtradb/include/fil0fil.h +++ b/storage/xtradb/include/fil0fil.h @@ -341,20 +341,19 @@ fil_read_flushed_lsn_and_arch_log_no( ib_uint64_t* min_flushed_lsn, /*!< in/out: */ ib_uint64_t* max_flushed_lsn); /*!< in/out: */ /*******************************************************************//** -Increments the count of pending insert buffer page merges, if space is not -being deleted. -@return TRUE if being deleted, and ibuf merges should be skipped */ +Increments the count of pending operation, if space is not being deleted. +@return TRUE if being deleted, and operation should be skipped */ UNIV_INTERN ibool -fil_inc_pending_ibuf_merges( -/*========================*/ +fil_inc_pending_ops( +/*================*/ ulint id); /*!< in: space id */ /*******************************************************************//** -Decrements the count of pending insert buffer page merges. */ +Decrements the count of pending operations. */ UNIV_INTERN void -fil_decr_pending_ibuf_merges( -/*=========================*/ +fil_decr_pending_ops( +/*=================*/ ulint id); /*!< in: space id */ #endif /* !UNIV_HOTBACKUP */ /*******************************************************************//** @@ -473,8 +472,11 @@ fil_open_single_table_tablespace( accessing the first page of the file */ ulint id, /*!< in: space id */ ulint flags, /*!< in: tablespace flags */ - const char* name); /*!< in: table name in the + const char* name, /*!< in: table name in the databasename/tablename format */ + trx_t* trx); /*!< in: transaction. This is only + used for IMPORT TABLESPACE, must be NULL + otherwise */ /********************************************************************//** It is possible, though very improbable, that the lsn's in the tablespace to be imported have risen above the current system lsn, if a lengthy purge, ibuf diff --git a/storage/xtradb/include/fsp0fsp.h b/storage/xtradb/include/fsp0fsp.h index 7abd3914eda..8506748ae03 100644 --- a/storage/xtradb/include/fsp0fsp.h +++ b/storage/xtradb/include/fsp0fsp.h @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1995, 2009, Innobase Oy. All Rights Reserved. +Copyright (c) 1995, 2012, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -11,8 +11,8 @@ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with -this program; if not, write to the Free Software Foundation, Inc., 59 Temple -Place, Suite 330, Boston, MA 02111-1307 USA +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA *****************************************************************************/ @@ -176,30 +176,33 @@ fseg_n_reserved_pages( Allocates a single free page from a segment. This function implements the intelligent allocation strategy which tries to minimize file space fragmentation. -@return the allocated page offset FIL_NULL if no page could be allocated */ -UNIV_INTERN -ulint -fseg_alloc_free_page( -/*=================*/ - fseg_header_t* seg_header, /*!< in: segment header */ - ulint hint, /*!< in: hint of which page would be desirable */ - byte direction, /*!< in: if the new page is needed because +@param[in/out] seg_header segment header +@param[in] hint hint of which page would be desirable +@param[in] direction if the new page is needed because of an index page split, and records are inserted there in order, into which direction they go alphabetically: FSP_DOWN, - FSP_UP, FSP_NO_DIR */ - mtr_t* mtr); /*!< in: mtr handle */ + FSP_UP, FSP_NO_DIR +@param[in/out] mtr mini-transaction +@return X-latched block, or NULL if no page could be allocated */ +#define fseg_alloc_free_page(seg_header, hint, direction, mtr) \ + fseg_alloc_free_page_general(seg_header, hint, direction, \ + FALSE, mtr, mtr) /**********************************************************************//** Allocates a single free page from a segment. This function implements the intelligent allocation strategy which tries to minimize file space fragmentation. -@return allocated page offset, FIL_NULL if no page could be allocated */ +@retval NULL if no page could be allocated +@retval block, rw_lock_x_lock_count(&block->lock) == 1 if allocation succeeded +(init_mtr == mtr, or the page was not previously freed in mtr) +@retval block (not allocated or initialized) otherwise */ UNIV_INTERN -ulint +buf_block_t* fseg_alloc_free_page_general( /*=========================*/ - fseg_header_t* seg_header,/*!< in: segment header */ - ulint hint, /*!< in: hint of which page would be desirable */ + fseg_header_t* seg_header,/*!< in/out: segment header */ + ulint hint, /*!< in: hint of which page would be + desirable */ byte direction,/*!< in: if the new page is needed because of an index page split, and records are inserted there in order, into which @@ -210,7 +213,12 @@ fseg_alloc_free_page_general( with fsp_reserve_free_extents, then there is no need to do the check for this individual page */ - mtr_t* mtr); /*!< in: mtr handle */ + mtr_t* mtr, /*!< in/out: mini-transaction */ + mtr_t* init_mtr)/*!< in/out: mtr or another mini-transaction + in which the page should be initialized. + If init_mtr!=mtr, but the page is already + latched in mtr, do not initialize the page. */ + __attribute__((warn_unused_result, nonnull)); /**********************************************************************//** Reserves free pages from a tablespace. All mini-transactions which may use several pages from the tablespace should call this function beforehand diff --git a/storage/xtradb/include/ha0ha.h b/storage/xtradb/include/ha0ha.h index 3299000bf3c..8bba564d153 100644 --- a/storage/xtradb/include/ha0ha.h +++ b/storage/xtradb/include/ha0ha.h @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1994, 2009, Innobase Oy. All Rights Reserved. +Copyright (c) 1994, 2011, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -31,13 +31,14 @@ Created 8/18/1994 Heikki Tuuri #include "hash0hash.h" #include "page0types.h" #include "buf0types.h" +#include "rem0types.h" /*************************************************************//** Looks for an element in a hash table. @return pointer to the data of the first hash table node in chain having the fold number, NULL if not found */ UNIV_INLINE -void* +const rec_t* ha_search_and_get_data( /*===================*/ hash_table_t* table, /*!< in: hash table */ @@ -51,11 +52,11 @@ ha_search_and_update_if_found_func( /*===============================*/ hash_table_t* table, /*!< in/out: hash table */ ulint fold, /*!< in: folded value of the searched data */ - void* data, /*!< in: pointer to the data */ + const rec_t* data, /*!< in: pointer to the data */ #if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG buf_block_t* new_block,/*!< in: block containing new_data */ #endif /* UNIV_AHI_DEBUG || UNIV_DEBUG */ - void* new_data);/*!< in: new pointer to the data */ + const rec_t* new_data);/*!< in: new pointer to the data */ #if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG /** Looks for an element when we know the pointer to the data and @@ -113,14 +114,6 @@ chosen to be a slightly bigger prime number. # define ha_create(n_c,n_m,level) ha_create_func(n_c,n_m) #endif /* UNIV_SYNC_DEBUG */ -/*************************************************************//** -Empties a hash table and frees the memory heaps. */ -UNIV_INTERN -void -ha_clear( -/*=====*/ - hash_table_t* table); /*!< in, own: hash table */ - /*************************************************************//** Inserts an entry into a hash table. If an entry with the same fold number is found, its node is updated to point to the new data, and no new node @@ -138,7 +131,7 @@ ha_insert_for_fold_func( #if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG buf_block_t* block, /*!< in: buffer block containing the data */ #endif /* UNIV_AHI_DEBUG || UNIV_DEBUG */ - void* data); /*!< in: data, must not be NULL */ + const rec_t* data); /*!< in: data, must not be NULL */ #if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG /** @@ -174,7 +167,7 @@ ha_search_and_delete_if_found( /*==========================*/ hash_table_t* table, /*!< in: hash table */ ulint fold, /*!< in: folded value of the searched data */ - void* data); /*!< in: pointer to the data */ + const rec_t* data); /*!< in: pointer to the data */ #ifndef UNIV_HOTBACKUP /*****************************************************************//** Removes from the chain determined by fold all nodes whose data pointer @@ -217,7 +210,7 @@ struct ha_node_struct { #if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG buf_block_t* block; /*!< buffer block containing the data, or NULL */ #endif /* UNIV_AHI_DEBUG || UNIV_DEBUG */ - void* data; /*!< pointer to the data */ + const rec_t* data; /*!< pointer to the data */ ulint fold; /*!< fold value for the data */ }; diff --git a/storage/xtradb/include/ha0ha.ic b/storage/xtradb/include/ha0ha.ic index 734403c4cd9..5656e9b7eba 100644 --- a/storage/xtradb/include/ha0ha.ic +++ b/storage/xtradb/include/ha0ha.ic @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1994, 2009, Innobase Oy. All Rights Reserved. +Copyright (c) 1994, 2011, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -25,6 +25,7 @@ Created 8/18/1994 Heikki Tuuri #include "ut0rnd.h" #include "mem0mem.h" +#include "btr0types.h" /***********************************************************//** Deletes a hash node. */ @@ -39,10 +40,10 @@ ha_delete_hash_node( Gets a hash node data. @return pointer to the data */ UNIV_INLINE -void* +const rec_t* ha_node_get_data( /*=============*/ - ha_node_t* node) /*!< in: hash chain node */ + const ha_node_t* node) /*!< in: hash chain node */ { return(node->data); } @@ -57,7 +58,7 @@ ha_node_set_data_func( #if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG buf_block_t* block, /*!< in: buffer block containing the data */ #endif /* UNIV_AHI_DEBUG || UNIV_DEBUG */ - void* data) /*!< in: pointer to the data */ + const rec_t* data) /*!< in: pointer to the data */ { #if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG node->block = block; @@ -105,41 +106,12 @@ ha_chain_get_first( hash_get_nth_cell(table, hash_calc_hash(fold, table))->node); } -/*************************************************************//** -Looks for an element in a hash table. -@return pointer to the first hash table node in chain having the fold -number, NULL if not found */ -UNIV_INLINE -ha_node_t* -ha_search( -/*======*/ - hash_table_t* table, /*!< in: hash table */ - ulint fold) /*!< in: folded value of the searched data */ -{ - ha_node_t* node; - - ASSERT_HASH_MUTEX_OWN(table, fold); - - node = ha_chain_get_first(table, fold); - - while (node) { - if (node->fold == fold) { - - return(node); - } - - node = ha_chain_get_next(node); - } - - return(NULL); -} - /*************************************************************//** Looks for an element in a hash table. @return pointer to the data of the first hash table node in chain having the fold number, NULL if not found */ UNIV_INLINE -void* +const rec_t* ha_search_and_get_data( /*===================*/ hash_table_t* table, /*!< in: hash table */ @@ -148,6 +120,10 @@ ha_search_and_get_data( ha_node_t* node; ASSERT_HASH_MUTEX_OWN(table, fold); +#ifdef UNIV_SYNC_DEBUG + ut_ad(rw_lock_own(&btr_search_latch, RW_LOCK_SHARED)); +#endif /* UNIV_SYNC_DEBUG */ + ut_ad(btr_search_enabled); node = ha_chain_get_first(table, fold); @@ -172,12 +148,14 @@ ha_search_with_data( /*================*/ hash_table_t* table, /*!< in: hash table */ ulint fold, /*!< in: folded value of the searched data */ - void* data) /*!< in: pointer to the data */ + const rec_t* data) /*!< in: pointer to the data */ { ha_node_t* node; ASSERT_HASH_MUTEX_OWN(table, fold); + ut_ad(btr_search_enabled); + node = ha_chain_get_first(table, fold); while (node) { @@ -202,11 +180,15 @@ ha_search_and_delete_if_found( /*==========================*/ hash_table_t* table, /*!< in: hash table */ ulint fold, /*!< in: folded value of the searched data */ - void* data) /*!< in: pointer to the data */ + const rec_t* data) /*!< in: pointer to the data */ { ha_node_t* node; ASSERT_HASH_MUTEX_OWN(table, fold); +#ifdef UNIV_SYNC_DEBUG + ut_ad(rw_lock_own(&btr_search_latch, RW_LOCK_EX)); +#endif /* UNIV_SYNC_DEBUG */ + ut_ad(btr_search_enabled); node = ha_search_with_data(table, fold, data); diff --git a/storage/xtradb/include/log0log.h b/storage/xtradb/include/log0log.h index 2b4b34f2600..152d83a191f 100644 --- a/storage/xtradb/include/log0log.h +++ b/storage/xtradb/include/log0log.h @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1995, 2010, Innobase Oy. All Rights Reserved. +Copyright (c) 1995, 2010, Oracle and/or its affiliates. All Rights Reserved. Copyright (c) 2009, Google Inc. Portions of this file contain modifications contributed and copyrighted by @@ -18,8 +18,8 @@ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with -this program; if not, write to the Free Software Foundation, Inc., 59 Temple -Place, Suite 330, Boston, MA 02111-1307 USA +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA *****************************************************************************/ diff --git a/storage/xtradb/include/mem0mem.ic b/storage/xtradb/include/mem0mem.ic index cbce2edc661..bf7b1c20cb4 100644 --- a/storage/xtradb/include/mem0mem.ic +++ b/storage/xtradb/include/mem0mem.ic @@ -208,10 +208,6 @@ mem_heap_alloc( caller */ buf = (byte*)buf + MEM_FIELD_HEADER_SIZE; -#endif -#ifdef UNIV_SET_MEM_TO_ZERO - UNIV_MEM_ALLOC(buf, n); - memset(buf, '\0', n); #endif UNIV_MEM_ALLOC(buf, n); return(buf); diff --git a/storage/xtradb/include/mtr0mtr.h b/storage/xtradb/include/mtr0mtr.h index 8a9ec8ea7f0..ecbfe750577 100644 --- a/storage/xtradb/include/mtr0mtr.h +++ b/storage/xtradb/include/mtr0mtr.h @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1995, 2011, Oracle and/or its affiliates. All Rights Reserved. +Copyright (c) 1995, 2012, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -11,8 +11,8 @@ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with -this program; if not, write to the Free Software Foundation, Inc., 59 Temple -Place, Suite 330, Boston, MA 02111-1307 USA +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA *****************************************************************************/ @@ -50,7 +50,9 @@ first 3 values must be RW_S_LATCH, RW_X_LATCH, RW_NO_LATCH */ #define MTR_MEMO_PAGE_S_FIX RW_S_LATCH #define MTR_MEMO_PAGE_X_FIX RW_X_LATCH #define MTR_MEMO_BUF_FIX RW_NO_LATCH -#define MTR_MEMO_MODIFY 54 +#ifdef UNIV_DEBUG +# define MTR_MEMO_MODIFY 54 +#endif /* UNIV_DEBUG */ #define MTR_MEMO_S_LOCK 55 #define MTR_MEMO_X_LOCK 56 @@ -378,11 +380,14 @@ struct mtr_struct{ dyn_array_t memo; /*!< memo stack for locks etc. */ dyn_array_t log; /*!< mini-transaction log */ ibool modifications; - /* TRUE if the mtr made modifications to - buffer pool pages */ + /*!< TRUE if the mini-transaction + modified buffer pool pages */ ulint n_log_recs; /* count of how many page initial log records have been written to the mtr log */ + ulint n_freed_pages; + /* number of pages that have been freed in + this mini-transaction */ ulint log_mode; /* specifies which operations should be logged; default value MTR_LOG_ALL */ ib_uint64_t start_lsn;/* start lsn of the possible log entry for diff --git a/storage/xtradb/include/mtr0mtr.ic b/storage/xtradb/include/mtr0mtr.ic index 18f8e87b3cf..4489e8e1c1e 100644 --- a/storage/xtradb/include/mtr0mtr.ic +++ b/storage/xtradb/include/mtr0mtr.ic @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1995, 2010, Innobase Oy. All Rights Reserved. +Copyright (c) 1995, 2012, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -11,8 +11,8 @@ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with -this program; if not, write to the Free Software Foundation, Inc., 59 Temple -Place, Suite 330, Boston, MA 02111-1307 USA +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA *****************************************************************************/ @@ -45,6 +45,7 @@ mtr_start( mtr->log_mode = MTR_LOG_ALL; mtr->modifications = FALSE; mtr->n_log_recs = 0; + mtr->n_freed_pages = 0; ut_d(mtr->state = MTR_ACTIVE); ut_d(mtr->magic_n = MTR_MAGIC_N); diff --git a/storage/xtradb/include/page0page.h b/storage/xtradb/include/page0page.h index aeaef030505..512f9ca0834 100644 --- a/storage/xtradb/include/page0page.h +++ b/storage/xtradb/include/page0page.h @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1994, 2011, Oracle and/or its affiliates. All Rights Reserved. +Copyright (c) 1994, 2012, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -11,8 +11,8 @@ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with -this program; if not, write to the Free Software Foundation, Inc., 59 Temple -Place, Suite 330, Boston, MA 02111-1307 USA +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA *****************************************************************************/ @@ -68,10 +68,7 @@ typedef byte page_header_t; #define PAGE_MAX_TRX_ID 18 /* highest id of a trx which may have modified a record on the page; a dulint; defined only in secondary indexes and in the insert buffer - tree; NOTE: this may be modified only - when the thread has an x-latch to the page, - and ALSO an x-latch to btr_search_latch - if there is a hash index to the page! */ + tree */ #define PAGE_HEADER_PRIV_END 26 /* end of private data structure of the page header which are set in a page create */ /*----*/ @@ -922,6 +919,7 @@ page_parse_create( ulint comp, /*!< in: nonzero=compact page format */ buf_block_t* block, /*!< in: block or NULL */ mtr_t* mtr); /*!< in: mtr or NULL */ +#ifndef UNIV_HOTBACKUP /************************************************************//** Prints record contents including the data relevant only in the index page context. */ @@ -931,6 +929,7 @@ page_rec_print( /*===========*/ const rec_t* rec, /*!< in: physical record */ const ulint* offsets);/*!< in: record descriptor */ +# ifdef UNIV_BTR_PRINT /***************************************************************//** This is used to print the contents of the directory for debugging purposes. */ @@ -970,6 +969,8 @@ page_print( in directory */ ulint rn); /*!< in: print rn first and last records in directory */ +# endif /* UNIV_BTR_PRINT */ +#endif /* !UNIV_HOTBACKUP */ /***************************************************************//** The following is used to validate a record on a page. This function differs from rec_validate as it can also check the n_owned field and diff --git a/storage/xtradb/include/page0page.ic b/storage/xtradb/include/page0page.ic index b34408aed17..005fba2e5a1 100644 --- a/storage/xtradb/include/page0page.ic +++ b/storage/xtradb/include/page0page.ic @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1994, 2011, Oracle and/or its affiliates. All Rights Reserved. +Copyright (c) 1994, 2012, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -11,8 +11,8 @@ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with -this program; if not, write to the Free Software Foundation, Inc., 59 Temple -Place, Suite 330, Boston, MA 02111-1307 USA +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA *****************************************************************************/ diff --git a/storage/xtradb/include/row0upd.ic b/storage/xtradb/include/row0upd.ic index 0894ed373b0..10646241125 100644 --- a/storage/xtradb/include/row0upd.ic +++ b/storage/xtradb/include/row0upd.ic @@ -28,7 +28,6 @@ Created 12/27/1996 Heikki Tuuri # include "trx0trx.h" # include "trx0undo.h" # include "row0row.h" -# include "btr0sea.h" #endif /* !UNIV_HOTBACKUP */ #include "page0zip.h" @@ -157,11 +156,6 @@ row_upd_rec_sys_fields( { ut_ad(dict_index_is_clust(index)); ut_ad(rec_offs_validate(rec, index, offsets)); -#ifdef UNIV_SYNC_DEBUG - if (!rw_lock_own(&btr_search_latch, RW_LOCK_EX)) { - ut_ad(!buf_block_align(rec)->is_hashed); - } -#endif /* UNIV_SYNC_DEBUG */ if (UNIV_LIKELY_NULL(page_zip)) { ulint pos = dict_index_get_sys_col_pos(index, DATA_TRX_ID); diff --git a/storage/xtradb/include/sync0rw.h b/storage/xtradb/include/sync0rw.h index 22de1bfdd93..bf365e502c4 100644 --- a/storage/xtradb/include/sync0rw.h +++ b/storage/xtradb/include/sync0rw.h @@ -565,7 +565,8 @@ struct rw_lock_struct { }; #ifdef UNIV_SYNC_DEBUG -/** The structure for storing debug info of an rw-lock */ +/** The structure for storing debug info of an rw-lock. All access to this +structure must be protected by rw_lock_debug_mutex_enter(). */ struct rw_lock_debug_struct { os_thread_id_t thread_id; /*!< The thread id of the thread which diff --git a/storage/xtradb/include/sync0rw.ic b/storage/xtradb/include/sync0rw.ic index 485a63a1b18..cd997febc30 100644 --- a/storage/xtradb/include/sync0rw.ic +++ b/storage/xtradb/include/sync0rw.ic @@ -406,6 +406,7 @@ rw_lock_s_lock_func( #ifdef UNIV_SYNC_DEBUG ut_ad(!rw_lock_own(lock, RW_LOCK_SHARED)); /* see NOTE above */ + ut_ad(!rw_lock_own(lock, RW_LOCK_EX)); #endif /* UNIV_SYNC_DEBUG */ /* TODO: study performance of UNIV_LIKELY branch prediction hints. */ @@ -563,8 +564,6 @@ rw_lock_x_unlock_func( if (lock->lock_word == 0) { /* Last caller in a possible recursive chain. */ lock->recursive = FALSE; - UNIV_MEM_INVALID(&lock->writer_thread, - sizeof lock->writer_thread); } #ifdef UNIV_SYNC_DEBUG @@ -605,8 +604,6 @@ rw_lock_x_unlock_direct( if (lock->lock_word == 0) { lock->recursive = FALSE; - UNIV_MEM_INVALID(&lock->writer_thread, - sizeof lock->writer_thread); } #ifdef UNIV_SYNC_DEBUG diff --git a/storage/xtradb/include/sync0sync.h b/storage/xtradb/include/sync0sync.h index 8b9a075e875..bb3c21f40f5 100644 --- a/storage/xtradb/include/sync0sync.h +++ b/storage/xtradb/include/sync0sync.h @@ -448,10 +448,6 @@ or row lock! */ #define SYNC_DICT_HEADER 995 #define SYNC_IBUF_HEADER 914 #define SYNC_IBUF_PESS_INSERT_MUTEX 912 -#define SYNC_IBUF_MUTEX 910 /* ibuf mutex is really below - SYNC_FSP_PAGE: we assign a value this - high only to make the program to pass - the debug checks */ /*-------------------------------*/ #define SYNC_INDEX_TREE 900 #define SYNC_TREE_NODE_NEW 892 @@ -468,8 +464,11 @@ or row lock! */ #define SYNC_FSP 400 #define SYNC_FSP_PAGE 395 /*------------------------------------- Insert buffer headers */ -/*------------------------------------- ibuf_mutex */ +#define SYNC_IBUF_MUTEX 370 /* ibuf_mutex */ /*------------------------------------- Insert buffer tree */ +#define SYNC_IBUF_INDEX_TREE 360 +#define SYNC_IBUF_TREE_NODE_NEW 359 +#define SYNC_IBUF_TREE_NODE 358 #define SYNC_IBUF_BITMAP_MUTEX 351 #define SYNC_IBUF_BITMAP 350 /*------------------------------------- MySQL query cache mutex */ @@ -482,7 +481,6 @@ or row lock! */ #define SYNC_LOG 170 #define SYNC_RECV 168 #define SYNC_WORK_QUEUE 162 -#define SYNC_SEARCH_SYS_CONF 161 /* for assigning btr_search_enabled */ #define SYNC_SEARCH_SYS 160 /* NOTE that if we have a memory heap that can be extended to the buffer pool, its logical level is diff --git a/storage/xtradb/include/trx0purge.h b/storage/xtradb/include/trx0purge.h index ae5bc6f90be..264e91b2432 100644 --- a/storage/xtradb/include/trx0purge.h +++ b/storage/xtradb/include/trx0purge.h @@ -164,9 +164,9 @@ struct trx_purge_struct{ read_view_t* view; /*!< The purge will not remove undo logs which are >= this view (purge view) */ mutex_t mutex; /*!< Mutex protecting the fields below */ - ulint n_pages_handled;/*!< Approximate number of undo log + ulonglong n_pages_handled;/*!< Approximate number of undo log pages processed in purge */ - ulint handle_limit; /*!< Target of how many pages to get + ulonglong handle_limit; /*!< Target of how many pages to get processed in the current purge */ /*------------------------------*/ /* The following two fields form the 'purge pointer' which advances diff --git a/storage/xtradb/include/trx0rec.ic b/storage/xtradb/include/trx0rec.ic index e7e41d6d9f6..6c411047dc6 100644 --- a/storage/xtradb/include/trx0rec.ic +++ b/storage/xtradb/include/trx0rec.ic @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1996, 2009, Innobase Oy. All Rights Reserved. +Copyright (c) 1996, 2012, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -11,8 +11,8 @@ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with -this program; if not, write to the Free Software Foundation, Inc., 59 Temple -Place, Suite 330, Boston, MA 02111-1307 USA +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA *****************************************************************************/ @@ -107,6 +107,7 @@ trx_undo_rec_copy( len = mach_read_from_2(undo_rec) - ut_align_offset(undo_rec, UNIV_PAGE_SIZE); + ut_ad(len < UNIV_PAGE_SIZE); return(mem_heap_dup(heap, undo_rec, len)); } #endif /* !UNIV_HOTBACKUP */ diff --git a/storage/xtradb/include/trx0rseg.ic b/storage/xtradb/include/trx0rseg.ic index daffa92fc7d..5e8d2b41120 100644 --- a/storage/xtradb/include/trx0rseg.ic +++ b/storage/xtradb/include/trx0rseg.ic @@ -25,6 +25,7 @@ Created 3/26/1996 Heikki Tuuri #include "srv0srv.h" #include "mtr0log.h" +#include "trx0sys.h" /******************************************************************//** Gets a rollback segment header. @@ -131,7 +132,13 @@ trx_rsegf_undo_find_free( ulint i; ulint page_no; - for (i = 0; i < TRX_RSEG_N_SLOTS; i++) { + for (i = 0; +#ifndef UNIV_DEBUG + i < TRX_RSEG_N_SLOTS; +#else + i < (trx_rseg_n_slots_debug ? trx_rseg_n_slots_debug : TRX_RSEG_N_SLOTS); +#endif + i++) { page_no = trx_rsegf_get_nth_undo(rsegf, i, mtr); diff --git a/storage/xtradb/include/trx0sys.h b/storage/xtradb/include/trx0sys.h index eafa1ab6409..8341592feb7 100644 --- a/storage/xtradb/include/trx0sys.h +++ b/storage/xtradb/include/trx0sys.h @@ -262,6 +262,12 @@ trx_id_t trx_sys_get_new_trx_no(void); /*========================*/ #endif /* !UNIV_HOTBACKUP */ + +#ifdef UNIV_DEBUG +/* Flag to control TRX_RSEG_N_SLOTS behavior debugging. */ +extern uint trx_rseg_n_slots_debug; +#endif + /*****************************************************************//** Writes a trx id to an index page. In case that the id size changes in some future version, this function should be used instead of diff --git a/storage/xtradb/include/trx0undo.h b/storage/xtradb/include/trx0undo.h index 4f15cd85833..585b5f36696 100644 --- a/storage/xtradb/include/trx0undo.h +++ b/storage/xtradb/include/trx0undo.h @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1996, 2009, Innobase Oy. All Rights Reserved. +Copyright (c) 1996, 2012, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -11,8 +11,8 @@ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with -this program; if not, write to the Free Software Foundation, Inc., 59 Temple -Place, Suite 330, Boston, MA 02111-1307 USA +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA *****************************************************************************/ @@ -194,27 +194,62 @@ trx_undo_get_first_rec( mtr_t* mtr); /*!< in: mtr */ /********************************************************************//** Tries to add a page to the undo log segment where the undo log is placed. -@return page number if success, else FIL_NULL */ +@return X-latched block if success, else NULL */ UNIV_INTERN -ulint +buf_block_t* trx_undo_add_page( /*==============*/ trx_t* trx, /*!< in: transaction */ trx_undo_t* undo, /*!< in: undo log memory object */ - mtr_t* mtr); /*!< in: mtr which does not have a latch to any + mtr_t* mtr) /*!< in: mtr which does not have a latch to any undo log page; the caller must have reserved the rollback segment mutex */ + __attribute__((nonnull, warn_unused_result)); +/********************************************************************//** +Frees the last undo log page. +The caller must hold the rollback segment mutex. */ +UNIV_INTERN +void +trx_undo_free_last_page_func( +/*==========================*/ +#ifdef UNIV_DEBUG + const trx_t* trx, /*!< in: transaction */ +#endif /* UNIV_DEBUG */ + trx_undo_t* undo, /*!< in/out: undo log memory copy */ + mtr_t* mtr) /*!< in/out: mini-transaction which does not + have a latch to any undo log page or which + has allocated the undo log page */ + __attribute__((nonnull)); +#ifdef UNIV_DEBUG +# define trx_undo_free_last_page(trx,undo,mtr) \ + trx_undo_free_last_page_func(trx,undo,mtr) +#else /* UNIV_DEBUG */ +# define trx_undo_free_last_page(trx,undo,mtr) \ + trx_undo_free_last_page_func(undo,mtr) +#endif /* UNIV_DEBUG */ + /***********************************************************************//** Truncates an undo log from the end. This function is used during a rollback to free space from an undo log. */ UNIV_INTERN void -trx_undo_truncate_end( -/*==================*/ - trx_t* trx, /*!< in: transaction whose undo log it is */ - trx_undo_t* undo, /*!< in: undo log */ - undo_no_t limit); /*!< in: all undo records with undo number +trx_undo_truncate_end_func( +/*=======================*/ +#ifdef UNIV_DEBUG + const trx_t* trx, /*!< in: transaction whose undo log it is */ +#endif /* UNIV_DEBUG */ + trx_undo_t* undo, /*!< in/out: undo log */ + undo_no_t limit) /*!< in: all undo records with undo number >= this value should be truncated */ + __attribute__((nonnull)); +#ifdef UNIV_DEBUG +# define trx_undo_truncate_end(trx,undo,limit) \ + trx_undo_truncate_end_func(trx,undo,limit) +#else /* UNIV_DEBUG */ +# define trx_undo_truncate_end(trx,undo,limit) \ + trx_undo_truncate_end_func(undo,limit) +#endif /* UNIV_DEBUG */ + /***********************************************************************//** Truncates an undo log from the start. This function is used during a purge operation. */ diff --git a/storage/xtradb/include/univ.i b/storage/xtradb/include/univ.i index 902d0c94ddd..ee515b7ca17 100644 --- a/storage/xtradb/include/univ.i +++ b/storage/xtradb/include/univ.i @@ -149,14 +149,6 @@ Sun Studio */ /* DEBUG VERSION CONTROL ===================== */ -/* The following flag will make InnoDB to initialize -all memory it allocates to zero. It hides Purify -warnings about reading unallocated memory unless -memory is read outside the allocated blocks. */ -/* -#define UNIV_INIT_MEM_TO_ZERO -*/ - /* When this macro is defined then additional test functions will be compiled. These functions live at the end of each relevant source file and have "test_" prefix. These functions are not called from anywhere in @@ -221,15 +213,6 @@ operations (very slow); also UNIV_DEBUG must be defined */ #define UNIV_BTR_DEBUG /* check B-tree links */ #define UNIV_LIGHT_MEM_DEBUG /* light memory debugging */ -#ifdef HAVE_valgrind -/* The following sets all new allocated memory to zero before use: -this can be used to eliminate unnecessary Purify warnings, but note that -it also masks many bugs Purify could detect. For detailed Purify analysis it -is best to remove the define below and look through the warnings one -by one. */ -#define UNIV_SET_MEM_TO_ZERO -#endif - /* #define UNIV_SQL_DEBUG #define UNIV_LOG_DEBUG diff --git a/storage/xtradb/include/ut0mem.h b/storage/xtradb/include/ut0mem.h index 9c6ee9049ec..5002c9e3801 100644 --- a/storage/xtradb/include/ut0mem.h +++ b/storage/xtradb/include/ut0mem.h @@ -78,40 +78,19 @@ ut_mem_init(void); /*=============*/ /**********************************************************************//** -Allocates memory. Sets it also to zero if UNIV_SET_MEM_TO_ZERO is -defined and set_to_zero is TRUE. +Allocates memory. @return own: allocated memory */ UNIV_INTERN void* ut_malloc_low( /*==========*/ ulint n, /*!< in: number of bytes to allocate */ - ibool set_to_zero, /*!< in: TRUE if allocated memory - should be set to zero if - UNIV_SET_MEM_TO_ZERO is defined */ - ibool assert_on_error); /*!< in: if TRUE, we crash mysqld if + ibool assert_on_error) /*!< in: if TRUE, we crash mysqld if the memory cannot be allocated */ + __attribute__((malloc)); /**********************************************************************//** -Allocates memory. Sets it also to zero if UNIV_SET_MEM_TO_ZERO is -defined. -@return own: allocated memory */ -UNIV_INTERN -void* -ut_malloc( -/*======*/ - ulint n); /*!< in: number of bytes to allocate */ -#ifndef UNIV_HOTBACKUP -/**********************************************************************//** -Tests if malloc of n bytes would succeed. ut_malloc() asserts if memory runs -out. It cannot be used if we want to return an error message. Prints to -stderr a message if fails. -@return TRUE if succeeded */ -UNIV_INTERN -ibool -ut_test_malloc( -/*===========*/ - ulint n); /*!< in: try to allocate this many bytes */ -#endif /* !UNIV_HOTBACKUP */ +Allocates memory. */ +#define ut_malloc(n) ut_malloc_low(n, TRUE) /**********************************************************************//** Frees a memory block allocated with ut_malloc. Freeing a NULL pointer is a nop. */ diff --git a/storage/xtradb/include/ut0rnd.ic b/storage/xtradb/include/ut0rnd.ic index d17036d83fc..1e62a7771ef 100644 --- a/storage/xtradb/include/ut0rnd.ic +++ b/storage/xtradb/include/ut0rnd.ic @@ -114,7 +114,7 @@ ut_rnd_interval( rnd = ut_rnd_gen_ulint(); - return(low + (rnd % (high - low + 1))); + return(low + (rnd % (high - low))); } /*********************************************************//** diff --git a/storage/xtradb/lock/lock0lock.c b/storage/xtradb/lock/lock0lock.c index e5da4f46ec9..d5ab6836134 100644 --- a/storage/xtradb/lock/lock0lock.c +++ b/storage/xtradb/lock/lock0lock.c @@ -5059,9 +5059,17 @@ lock_validate(void) lock_mutex_exit_kernel(); - lock_rec_validate_page(space, - fil_space_get_zip_size(space), - page_no); + /* Make sure that the tablespace is not + deleted while we are trying to access + the page. */ + if (!fil_inc_pending_ops(space)) { + lock_rec_validate_page( + space, + fil_space_get_zip_size(space), + page_no); + + fil_decr_pending_ops(space); + } lock_mutex_enter_kernel(); diff --git a/storage/xtradb/log/log0log.c b/storage/xtradb/log/log0log.c index fc8745629d6..a1da38c4579 100644 --- a/storage/xtradb/log/log0log.c +++ b/storage/xtradb/log/log0log.c @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1995, 2010, Innobase Oy. All Rights Reserved. +Copyright (c) 1995, 2010, Oracle and/or its affiliates. All Rights Reserved. Copyright (c) 2009, Google Inc. Portions of this file contain modifications contributed and copyrighted by @@ -18,8 +18,8 @@ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with -this program; if not, write to the Free Software Foundation, Inc., 59 Temple -Place, Suite 330, Boston, MA 02111-1307 USA +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA *****************************************************************************/ diff --git a/storage/xtradb/mem/mem0pool.c b/storage/xtradb/mem/mem0pool.c index 3291453eeb5..8a01be66506 100644 --- a/storage/xtradb/mem/mem0pool.c +++ b/storage/xtradb/mem/mem0pool.c @@ -223,11 +223,7 @@ mem_pool_create( pool = ut_malloc(sizeof(mem_pool_t)); - /* We do not set the memory to zero (FALSE) in the pool, - but only when allocated at a higher level in mem0mem.c. - This is to avoid masking useful Purify warnings. */ - - pool->buf = ut_malloc_low(size, FALSE, TRUE); + pool->buf = ut_malloc_low(size, TRUE); pool->size = size; mutex_create(&pool->mutex, SYNC_MEM_POOL); diff --git a/storage/xtradb/mtr/mtr0mtr.c b/storage/xtradb/mtr/mtr0mtr.c index a9f1c35f84c..3b6dfa7bd26 100644 --- a/storage/xtradb/mtr/mtr0mtr.c +++ b/storage/xtradb/mtr/mtr0mtr.c @@ -11,8 +11,8 @@ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with -this program; if not, write to the Free Software Foundation, Inc., 59 Temple -Place, Suite 330, Boston, MA 02111-1307 USA +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA *****************************************************************************/ diff --git a/storage/xtradb/mysql-test/patches/README b/storage/xtradb/mysql-test/patches/README new file mode 100644 index 00000000000..122d756e9e3 --- /dev/null +++ b/storage/xtradb/mysql-test/patches/README @@ -0,0 +1,30 @@ +This directory contains patches that need to be applied to the MySQL +source tree in order to get the mysql-test suite to succeed (when +storage/innobase is replaced with this InnoDB branch). Things to keep +in mind when adding new patches here: + +* The patch must be appliable from the mysql top-level source directory. + +* The patch filename must end in ".diff". + +* All patches here are expected to apply cleanly to the latest MySQL 5.1 + tree when storage/innobase is replaced with this InnoDB branch. If + changes to either of those cause the patch to fail, then please check + whether the patch is still needed and, if yes, adjust it so it applies + cleanly. + +* If applicable, always submit the patch at http://bugs.mysql.com and + name the file here like bug%d.diff. Once the patch is committed to + MySQL remove the file from here. + +* If the patch cannot be proposed for inclusion in the MySQL source tree + (via http://bugs.mysql.com) then add a comment at the beginning of the + patch, explaining the problem it is solving, how it does solve it and + why it is not applicable for inclusion in the MySQL source tree. + Obviously this is a very bad situation and should be avoided at all + costs, especially for files that are in the MySQL source repository + (not in storage/innobase). + +* If you ever need to add a patch here that is not related to mysql-test + suite, then please move this directory from ./mysql-test/patches to + ./patches and remove this text. diff --git a/storage/xtradb/mysql-test/patches/index_merge_innodb-explain.diff b/storage/xtradb/mysql-test/patches/index_merge_innodb-explain.diff new file mode 100644 index 00000000000..d1ed8afc778 --- /dev/null +++ b/storage/xtradb/mysql-test/patches/index_merge_innodb-explain.diff @@ -0,0 +1,31 @@ +InnoDB's estimate for the index cardinality depends on a pseudo random +number generator (it picks up random pages to sample). After an +optimization that was made in r2625 the following EXPLAINs started +returning a different number of rows (3 instead of 4). + +This patch adjusts the result file. + +This patch cannot be proposed to MySQL because the failures occur only +in this tree and do not occur in the standard InnoDB 5.1. Furthermore, +the file index_merge2.inc is used by other engines too. + +--- mysql-test/r/index_merge_innodb.result.orig 2008-09-30 18:32:13.000000000 +0300 ++++ mysql-test/r/index_merge_innodb.result 2008-09-30 18:33:01.000000000 +0300 +@@ -111,7 +111,7 @@ + explain select count(*) from t1 where + key1a = 2 and key1b is null and key2a = 2 and key2b is null; + id select_type table type possible_keys key key_len ref rows Extra +-1 SIMPLE t1 index_merge i1,i2 i1,i2 10,10 NULL 4 Using intersect(i1,i2); Using where; Using index ++1 SIMPLE t1 index_merge i1,i2 i1,i2 10,10 NULL 3 Using intersect(i1,i2); Using where; Using index + select count(*) from t1 where + key1a = 2 and key1b is null and key2a = 2 and key2b is null; + count(*) +@@ -119,7 +119,7 @@ + explain select count(*) from t1 where + key1a = 2 and key1b is null and key3a = 2 and key3b is null; + id select_type table type possible_keys key key_len ref rows Extra +-1 SIMPLE t1 index_merge i1,i3 i1,i3 10,10 NULL 4 Using intersect(i1,i3); Using where; Using index ++1 SIMPLE t1 index_merge i1,i3 i1,i3 10,10 NULL 3 Using intersect(i1,i3); Using where; Using index + select count(*) from t1 where + key1a = 2 and key1b is null and key3a = 2 and key3b is null; + count(*) diff --git a/storage/xtradb/mysql-test/patches/information_schema.diff b/storage/xtradb/mysql-test/patches/information_schema.diff new file mode 100644 index 00000000000..a3a21f7a08d --- /dev/null +++ b/storage/xtradb/mysql-test/patches/information_schema.diff @@ -0,0 +1,124 @@ +--- mysql-test/r/information_schema.result.orig 2009-01-31 03:38:50.000000000 +0200 ++++ mysql-test/r/information_schema.result 2009-01-31 07:51:58.000000000 +0200 +@@ -71,6 +71,13 @@ + TRIGGERS + USER_PRIVILEGES + VIEWS ++INNODB_CMP_RESET ++INNODB_TRX ++INNODB_CMPMEM_RESET ++INNODB_LOCK_WAITS ++INNODB_CMPMEM ++INNODB_CMP ++INNODB_LOCKS + columns_priv + db + event +@@ -799,6 +806,8 @@ + TABLES UPDATE_TIME datetime + TABLES CHECK_TIME datetime + TRIGGERS CREATED datetime ++INNODB_TRX trx_started datetime ++INNODB_TRX trx_wait_started datetime + event execute_at datetime + event last_executed datetime + event starts datetime +@@ -852,7 +861,7 @@ + flush privileges; + SELECT table_schema, count(*) FROM information_schema.TABLES WHERE table_schema IN ('mysql', 'INFORMATION_SCHEMA', 'test', 'mysqltest') AND table_name<>'ndb_binlog_index' AND table_name<>'ndb_apply_status' GROUP BY TABLE_SCHEMA; + table_schema count(*) +-information_schema 28 ++information_schema 35 + mysql 22 + create table t1 (i int, j int); + create trigger trg1 before insert on t1 for each row +@@ -1267,6 +1276,13 @@ + TRIGGERS TRIGGER_SCHEMA + USER_PRIVILEGES GRANTEE + VIEWS TABLE_SCHEMA ++INNODB_CMP_RESET page_size ++INNODB_TRX trx_id ++INNODB_CMPMEM_RESET page_size ++INNODB_LOCK_WAITS requesting_trx_id ++INNODB_CMPMEM page_size ++INNODB_CMP page_size ++INNODB_LOCKS lock_id + SELECT t.table_name, c1.column_name + FROM information_schema.tables t + INNER JOIN +@@ -1310,6 +1326,13 @@ + TRIGGERS TRIGGER_SCHEMA + USER_PRIVILEGES GRANTEE + VIEWS TABLE_SCHEMA ++INNODB_CMP_RESET page_size ++INNODB_TRX trx_id ++INNODB_CMPMEM_RESET page_size ++INNODB_LOCK_WAITS requesting_trx_id ++INNODB_CMPMEM page_size ++INNODB_CMP page_size ++INNODB_LOCKS lock_id + SELECT MAX(table_name) FROM information_schema.tables WHERE table_schema IN ('mysql', 'INFORMATION_SCHEMA', 'test'); + MAX(table_name) + VIEWS +@@ -1386,6 +1409,13 @@ + FILES information_schema.FILES 1 + GLOBAL_STATUS information_schema.GLOBAL_STATUS 1 + GLOBAL_VARIABLES information_schema.GLOBAL_VARIABLES 1 ++INNODB_CMP information_schema.INNODB_CMP 1 ++INNODB_CMPMEM information_schema.INNODB_CMPMEM 1 ++INNODB_CMPMEM_RESET information_schema.INNODB_CMPMEM_RESET 1 ++INNODB_CMP_RESET information_schema.INNODB_CMP_RESET 1 ++INNODB_LOCKS information_schema.INNODB_LOCKS 1 ++INNODB_LOCK_WAITS information_schema.INNODB_LOCK_WAITS 1 ++INNODB_TRX information_schema.INNODB_TRX 1 + KEY_COLUMN_USAGE information_schema.KEY_COLUMN_USAGE 1 + PARTITIONS information_schema.PARTITIONS 1 + PLUGINS information_schema.PLUGINS 1 +diff mysql-test/r/information_schema_db.result.orig mysql-test/r/information_schema_db.result +--- mysql-test/r/information_schema_db.result.orig 2008-08-04 09:27:49.000000000 +0300 ++++ mysql-test/r/information_schema_db.result 2008-10-07 12:26:31.000000000 +0300 +@@ -33,6 +33,13 @@ + TRIGGERS + USER_PRIVILEGES + VIEWS ++INNODB_CMP_RESET ++INNODB_TRX ++INNODB_CMPMEM_RESET ++INNODB_LOCK_WAITS ++INNODB_CMPMEM ++INNODB_CMP ++INNODB_LOCKS + show tables from INFORMATION_SCHEMA like 'T%'; + Tables_in_information_schema (T%) + TABLES +diff mysql-test/r/mysqlshow.result.orig mysql-test/r/mysqlshow.result +--- mysql-test/r/mysqlshow.result.orig 2008-08-04 09:27:51.000000000 +0300 ++++ mysql-test/r/mysqlshow.result 2008-10-07 12:35:39.000000000 +0300 +@@ -107,6 +107,13 @@ + | TRIGGERS | + | USER_PRIVILEGES | + | VIEWS | ++| INNODB_CMP_RESET | ++| INNODB_TRX | ++| INNODB_CMPMEM_RESET | ++| INNODB_LOCK_WAITS | ++| INNODB_CMPMEM | ++| INNODB_CMP | ++| INNODB_LOCKS | + +---------------------------------------+ + Database: INFORMATION_SCHEMA + +---------------------------------------+ +@@ -140,6 +147,13 @@ + | TRIGGERS | + | USER_PRIVILEGES | + | VIEWS | ++| INNODB_CMP_RESET | ++| INNODB_TRX | ++| INNODB_CMPMEM_RESET | ++| INNODB_LOCK_WAITS | ++| INNODB_CMPMEM | ++| INNODB_CMP | ++| INNODB_LOCKS | + +---------------------------------------+ + Wildcard: inf_rmation_schema + +--------------------+ diff --git a/storage/xtradb/mysql-test/patches/innodb_file_per_table.diff b/storage/xtradb/mysql-test/patches/innodb_file_per_table.diff new file mode 100644 index 00000000000..8b7ae2036c9 --- /dev/null +++ b/storage/xtradb/mysql-test/patches/innodb_file_per_table.diff @@ -0,0 +1,47 @@ +diff mysql-test/suite/sys_vars/t/innodb_file_per_table_basic.test.orig mysql-test/suite/sys_vars/t/innodb_file_per_table_basic.test +--- mysql-test/suite/sys_vars/t/innodb_file_per_table_basic.test.orig 2008-10-07 11:32:30.000000000 +0300 ++++ mysql-test/suite/sys_vars/t/innodb_file_per_table_basic.test 2008-10-07 11:52:14.000000000 +0300 +@@ -37,10 +37,6 @@ + # Check if Value can set # + #################################################################### + +---error ER_INCORRECT_GLOBAL_LOCAL_VAR +-SET @@GLOBAL.innodb_file_per_table=1; +---echo Expected error 'Read only variable' +- + SELECT COUNT(@@GLOBAL.innodb_file_per_table); + --echo 1 Expected + +@@ -52,7 +48,7 @@ + # Check if the value in GLOBAL Table matches value in variable # + ################################################################# + +-SELECT @@GLOBAL.innodb_file_per_table = VARIABLE_VALUE ++SELECT IF(@@GLOBAL.innodb_file_per_table,'ON','OFF') = VARIABLE_VALUE + FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES + WHERE VARIABLE_NAME='innodb_file_per_table'; + --echo 1 Expected +diff mysql-test/suite/sys_vars/r/innodb_file_per_table_basic.result.orig mysql-test/suite/sys_vars/r/innodb_file_per_table_basic.result +--- mysql-test/suite/sys_vars/r/innodb_file_per_table_basic.result.orig 2008-10-07 11:32:02.000000000 +0300 ++++ mysql-test/suite/sys_vars/r/innodb_file_per_table_basic.result 2008-10-07 11:52:47.000000000 +0300 +@@ -4,18 +4,15 @@ + 1 + 1 Expected + '#---------------------BS_STVARS_028_02----------------------#' +-SET @@GLOBAL.innodb_file_per_table=1; +-ERROR HY000: Variable 'innodb_file_per_table' is a read only variable +-Expected error 'Read only variable' + SELECT COUNT(@@GLOBAL.innodb_file_per_table); + COUNT(@@GLOBAL.innodb_file_per_table) + 1 + 1 Expected + '#---------------------BS_STVARS_028_03----------------------#' +-SELECT @@GLOBAL.innodb_file_per_table = VARIABLE_VALUE ++SELECT IF(@@GLOBAL.innodb_file_per_table,'ON','OFF') = VARIABLE_VALUE + FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES + WHERE VARIABLE_NAME='innodb_file_per_table'; +-@@GLOBAL.innodb_file_per_table = VARIABLE_VALUE ++IF(@@GLOBAL.innodb_file_per_table,'ON','OFF') = VARIABLE_VALUE + 1 + 1 Expected + SELECT COUNT(@@GLOBAL.innodb_file_per_table); diff --git a/storage/xtradb/mysql-test/patches/innodb_lock_wait_timeout.diff b/storage/xtradb/mysql-test/patches/innodb_lock_wait_timeout.diff new file mode 100644 index 00000000000..bc61a0f5841 --- /dev/null +++ b/storage/xtradb/mysql-test/patches/innodb_lock_wait_timeout.diff @@ -0,0 +1,55 @@ +--- mysql-test/suite/sys_vars/t/innodb_lock_wait_timeout_basic.test.orig 2008-08-04 09:28:16.000000000 +0300 ++++ mysql-test/suite/sys_vars/t/innodb_lock_wait_timeout_basic.test 2008-10-07 11:14:15.000000000 +0300 +@@ -37,10 +37,6 @@ + # Check if Value can set # + #################################################################### + +---error ER_INCORRECT_GLOBAL_LOCAL_VAR +-SET @@GLOBAL.innodb_lock_wait_timeout=1; +---echo Expected error 'Read only variable' +- + SELECT COUNT(@@GLOBAL.innodb_lock_wait_timeout); + --echo 1 Expected + +@@ -84,13 +80,9 @@ + SELECT COUNT(@@innodb_lock_wait_timeout); + --echo 1 Expected + +---Error ER_INCORRECT_GLOBAL_LOCAL_VAR + SELECT COUNT(@@local.innodb_lock_wait_timeout); +---echo Expected error 'Variable is a GLOBAL variable' + +---Error ER_INCORRECT_GLOBAL_LOCAL_VAR + SELECT COUNT(@@SESSION.innodb_lock_wait_timeout); +---echo Expected error 'Variable is a GLOBAL variable' + + SELECT COUNT(@@GLOBAL.innodb_lock_wait_timeout); + --echo 1 Expected +--- mysql-test/suite/sys_vars/r/innodb_lock_wait_timeout_basic.result.orig 2008-08-04 09:27:50.000000000 +0300 ++++ mysql-test/suite/sys_vars/r/innodb_lock_wait_timeout_basic.result 2008-10-07 11:15:14.000000000 +0300 +@@ -4,9 +4,6 @@ + 1 + 1 Expected + '#---------------------BS_STVARS_032_02----------------------#' +-SET @@GLOBAL.innodb_lock_wait_timeout=1; +-ERROR HY000: Variable 'innodb_lock_wait_timeout' is a read only variable +-Expected error 'Read only variable' + SELECT COUNT(@@GLOBAL.innodb_lock_wait_timeout); + COUNT(@@GLOBAL.innodb_lock_wait_timeout) + 1 +@@ -39,11 +36,11 @@ + 1 + 1 Expected + SELECT COUNT(@@local.innodb_lock_wait_timeout); +-ERROR HY000: Variable 'innodb_lock_wait_timeout' is a GLOBAL variable +-Expected error 'Variable is a GLOBAL variable' ++COUNT(@@local.innodb_lock_wait_timeout) ++1 + SELECT COUNT(@@SESSION.innodb_lock_wait_timeout); +-ERROR HY000: Variable 'innodb_lock_wait_timeout' is a GLOBAL variable +-Expected error 'Variable is a GLOBAL variable' ++COUNT(@@SESSION.innodb_lock_wait_timeout) ++1 + SELECT COUNT(@@GLOBAL.innodb_lock_wait_timeout); + COUNT(@@GLOBAL.innodb_lock_wait_timeout) + 1 diff --git a/storage/xtradb/mysql-test/patches/innodb_thread_concurrency_basic.diff b/storage/xtradb/mysql-test/patches/innodb_thread_concurrency_basic.diff new file mode 100644 index 00000000000..72e5457905f --- /dev/null +++ b/storage/xtradb/mysql-test/patches/innodb_thread_concurrency_basic.diff @@ -0,0 +1,31 @@ +--- mysql-test/suite/sys_vars/r/innodb_thread_concurrency_basic.result.orig 2008-12-04 18:45:52 -06:00 ++++ mysql-test/suite/sys_vars/r/innodb_thread_concurrency_basic.result 2009-02-12 02:05:48 -06:00 +@@ -1,19 +1,19 @@ + SET @global_start_value = @@global.innodb_thread_concurrency; + SELECT @global_start_value; + @global_start_value +-8 ++0 + '#--------------------FN_DYNVARS_046_01------------------------#' + SET @@global.innodb_thread_concurrency = 0; + SET @@global.innodb_thread_concurrency = DEFAULT; + SELECT @@global.innodb_thread_concurrency; + @@global.innodb_thread_concurrency +-8 ++0 + '#---------------------FN_DYNVARS_046_02-------------------------#' + SET innodb_thread_concurrency = 1; + ERROR HY000: Variable 'innodb_thread_concurrency' is a GLOBAL variable and should be set with SET GLOBAL + SELECT @@innodb_thread_concurrency; + @@innodb_thread_concurrency +-8 ++0 + SELECT local.innodb_thread_concurrency; + ERROR 42S02: Unknown table 'local' in field list + SET global innodb_thread_concurrency = 0; +@@ -93,4 +93,4 @@ + SET @@global.innodb_thread_concurrency = @global_start_value; + SELECT @@global.innodb_thread_concurrency; + @@global.innodb_thread_concurrency +-8 ++0 diff --git a/storage/xtradb/mysql-test/patches/partition_innodb.diff b/storage/xtradb/mysql-test/patches/partition_innodb.diff new file mode 100644 index 00000000000..01bc073008e --- /dev/null +++ b/storage/xtradb/mysql-test/patches/partition_innodb.diff @@ -0,0 +1,59 @@ +The partition_innodb test only fails if run immediately after innodb_trx_weight. +The reason for this failure is that innodb_trx_weight creates deadlocks and +leaves something like this in the SHOW ENGINE INNODB STATUS output: + + ------------------------ + LATEST DETECTED DEADLOCK + ------------------------ + 090213 10:26:25 + *** (1) TRANSACTION: + TRANSACTION 313, ACTIVE 0 sec, OS thread id 13644672 inserting + mysql tables in use 1, locked 1 + LOCK WAIT 4 lock struct(s), heap size 488, 3 row lock(s) + MySQL thread id 3, query id 36 localhost root update + +The regular expressions that partition_innodb is using are intended to extract +the lock structs and row locks numbers from another part of the output: + + ------------ + TRANSACTIONS + ------------ + Trx id counter 31D + Purge done for trx's n:o < 0 undo n:o < 0 + History list length 4 + LIST OF TRANSACTIONS FOR EACH SESSION: + ---TRANSACTION 0, not started, OS thread id 13645056 + 0 lock struct(s), heap size 488, 0 row lock(s) + MySQL thread id 8, query id 81 localhost root + +In the InnoDB Plugin a transaction id is not printed as 2 consecutive +decimal integers (as it is in InnoDB 5.1) but rather as a single +hexadecimal integer. Thus the regular expressions somehow pick the wrong +part of the SHOW ENGINE INNODB STATUS output. + +So after the regular expressions are adjusted to the InnoDB Plugin's variant +of trx_id prinout, then they pick the expected part of the output. + +This patch cannot be proposed to MySQL because the failures occur only +in this tree and do not occur in the standard InnoDB 5.1. + +--- mysql-test/t/partition_innodb.test 2008-11-14 22:51:17 +0000 ++++ mysql-test/t/partition_innodb.test 2009-02-13 07:36:07 +0000 +@@ -27,14 +27,14 @@ + + # grouping/referencing in replace_regex is very slow on long strings, + # removing all before/after the interesting row before grouping/referencing +---replace_regex /.*---TRANSACTION [0-9]+ [0-9]+, .*, OS thread id [0-9]+// /MySQL thread id [0-9]+, query id [0-9]+ .*// /.*([0-9]+ lock struct\(s\)), heap size [0-9]+, ([0-9]+ row lock\(s\)).*/\1 \2/ ++--replace_regex /.*---TRANSACTION [0-9A-F]+, .*, OS thread id [0-9]+// /MySQL thread id [0-9]+, query id [0-9]+ .*// /.*([0-9]+ lock struct\(s\)), heap size [0-9]+, ([0-9]+ row lock\(s\)).*/\1 \2/ + SHOW ENGINE InnoDB STATUS; + + UPDATE t1 SET data = data*2 WHERE data = 2; + + # grouping/referencing in replace_regex is very slow on long strings, + # removing all before/after the interesting row before grouping/referencing +---replace_regex /.*---TRANSACTION [0-9]+ [0-9]+, .*, OS thread id [0-9]+// /MySQL thread id [0-9]+, query id [0-9]+ .*// /.*([0-9]+ lock struct\(s\)), heap size [0-9]+, ([0-9]+ row lock\(s\)).*/\1 \2/ ++--replace_regex /.*---TRANSACTION [0-9A-F]+, .*, OS thread id [0-9]+// /MySQL thread id [0-9]+, query id [0-9]+ .*// /.*([0-9]+ lock struct\(s\)), heap size [0-9]+, ([0-9]+ row lock\(s\)).*/\1 \2/ + SHOW ENGINE InnoDB STATUS; + + SET @@session.tx_isolation = @old_tx_isolation; + diff --git a/storage/xtradb/os/os0file.c b/storage/xtradb/os/os0file.c index b502be1eb00..ef048188353 100644 --- a/storage/xtradb/os/os0file.c +++ b/storage/xtradb/os/os0file.c @@ -3593,13 +3593,12 @@ os_aio_simulated_wake_handler_thread( { os_aio_array_t* array; os_aio_slot_t* slot; - ulint segment __attribute__ ((unused)); ulint n; ulint i; ut_ad(!os_aio_use_native_aio); - segment = os_aio_get_array_and_local_segment(&array, global_segment); + os_aio_get_array_and_local_segment(&array, global_segment); n = array->n_slots; @@ -4079,7 +4078,6 @@ os_aio_simulated_handle( ulint* space_id) { os_aio_array_t* array; - ulint segment __attribute__ ((unused)); os_aio_slot_t* slot; os_aio_slot_t* slot2; os_aio_slot_t* consecutive_ios[OS_AIO_MERGE_N_CONSECUTIVE]; @@ -4102,7 +4100,7 @@ os_aio_simulated_handle( /* Fix compiler warning */ *consecutive_ios = NULL; - segment = os_aio_get_array_and_local_segment(&array, global_segment); + os_aio_get_array_and_local_segment(&array, global_segment); restart: /* NOTE! We only access constant fields in os_aio_array. Therefore @@ -4111,7 +4109,6 @@ restart: srv_set_io_thread_op_info(global_segment, "looking for i/o requests (a)"); ut_ad(os_aio_validate()); - ut_ad(segment < array->n_segments); n = array->n_slots; diff --git a/storage/xtradb/os/os0proc.c b/storage/xtradb/os/os0proc.c index 48922886f23..a0679e31570 100644 --- a/storage/xtradb/os/os0proc.c +++ b/storage/xtradb/os/os0proc.c @@ -111,9 +111,6 @@ os_mem_alloc_large( os_fast_mutex_lock(&ut_list_mutex); ut_total_allocated_memory += size; os_fast_mutex_unlock(&ut_list_mutex); -# ifdef UNIV_SET_MEM_TO_ZERO - memset(ptr, '\0', size); -# endif UNIV_MEM_ALLOC(ptr, size); return(ptr); } diff --git a/storage/xtradb/page/page0cur.c b/storage/xtradb/page/page0cur.c index b8c492328e8..88ee6bc09a9 100644 --- a/storage/xtradb/page/page0cur.c +++ b/storage/xtradb/page/page0cur.c @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1994, 2011, Oracle and/or its affiliates. All Rights Reserved. +Copyright (c) 1994, 2012, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -11,8 +11,8 @@ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with -this program; if not, write to the Free Software Foundation, Inc., 59 Temple -Place, Suite 330, Boston, MA 02111-1307 USA +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA *****************************************************************************/ diff --git a/storage/xtradb/page/page0page.c b/storage/xtradb/page/page0page.c index 6243029019d..7b72a22fd1c 100644 --- a/storage/xtradb/page/page0page.c +++ b/storage/xtradb/page/page0page.c @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1994, 2011, Oracle and/or its affiliates. All Rights Reserved. +Copyright (c) 1994, 2012, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -11,8 +11,8 @@ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with -this program; if not, write to the Free Software Foundation, Inc., 59 Temple -Place, Suite 330, Boston, MA 02111-1307 USA +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA *****************************************************************************/ @@ -215,12 +215,6 @@ page_set_max_trx_id( { page_t* page = buf_block_get_frame(block); #ifndef UNIV_HOTBACKUP - const ibool is_hashed = block->is_hashed; - - if (is_hashed) { - rw_lock_x_lock(&btr_search_latch); - } - ut_ad(!mtr || mtr_memo_contains(mtr, block, MTR_MEMO_PAGE_X_FIX)); #endif /* !UNIV_HOTBACKUP */ @@ -241,12 +235,6 @@ page_set_max_trx_id( } else { mach_write_to_8(page + (PAGE_HEADER + PAGE_MAX_TRX_ID), trx_id); } - -#ifndef UNIV_HOTBACKUP - if (is_hashed) { - rw_lock_x_unlock(&btr_search_latch); - } -#endif /* !UNIV_HOTBACKUP */ } /************************************************************//** @@ -1632,6 +1620,7 @@ page_rec_print( rec_validate(rec, offsets); } +# ifdef UNIV_BTR_PRINT /***************************************************************//** This is used to print the contents of the directory for debugging purposes. */ @@ -1792,6 +1781,7 @@ page_print( page_dir_print(page, dn); page_print_list(block, index, rn); } +# endif /* UNIV_BTR_PRINT */ #endif /* !UNIV_HOTBACKUP */ /***************************************************************//** diff --git a/storage/xtradb/revert_gen.sh b/storage/xtradb/revert_gen.sh new file mode 100644 index 00000000000..231e05a21e0 --- /dev/null +++ b/storage/xtradb/revert_gen.sh @@ -0,0 +1,8 @@ +#!/bin/bash +# +# revert changes to all generated files. this is useful in some situations +# when merging changes between branches. + +set -eu + +svn revert include/pars0grm.h pars/pars0grm.h pars/lexyy.c pars/pars0grm.c diff --git a/storage/xtradb/row/row0ins.c b/storage/xtradb/row/row0ins.c index 0bcbc14fbf6..d6f486e5c1b 100644 --- a/storage/xtradb/row/row0ins.c +++ b/storage/xtradb/row/row0ins.c @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1996, 2011, Oracle and/or its affiliates. All Rights Reserved. +Copyright (c) 1996, 2012, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -11,8 +11,8 @@ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with -this program; if not, write to the Free Software Foundation, Inc., 59 Temple -Place, Suite 330, Boston, MA 02111-1307 USA +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA *****************************************************************************/ @@ -23,6 +23,15 @@ Insert into a table Created 4/20/1996 Heikki Tuuri *******************************************************/ +#ifdef __WIN__ +/* error LNK2001: unresolved external symbol _debug_sync_C_callback_ptr */ +# define DEBUG_SYNC_C(dummy) ((void) 0) +#else +# include "my_global.h" /* HAVE_* */ +# include "m_string.h" /* for my_sys.h */ +# include "my_sys.h" /* DEBUG_SYNC_C */ +#endif + #include "row0ins.h" #ifdef UNIV_NONINL @@ -1093,6 +1102,9 @@ row_ins_foreign_check_on_constraint( release the latch. */ row_mysql_unfreeze_data_dictionary(thr_get_trx(thr)); + + DEBUG_SYNC_C("innodb_dml_cascade_dict_unfreeze"); + row_mysql_freeze_data_dictionary(thr_get_trx(thr)); mtr_start(mtr); @@ -1676,7 +1688,7 @@ row_ins_scan_sec_index_for_duplicate( ulint n_fields_cmp; btr_pcur_t pcur; ulint err = DB_SUCCESS; - unsigned allow_duplicates; + ulint allow_duplicates; mtr_t mtr; mem_heap_t* heap = NULL; ulint offsets_[REC_OFFS_NORMAL_SIZE]; @@ -1707,7 +1719,7 @@ row_ins_scan_sec_index_for_duplicate( btr_pcur_open(index, entry, PAGE_CUR_GE, BTR_SEARCH_LEAF, &pcur, &mtr); - allow_duplicates = thr_get_trx(thr)->duplicates & TRX_DUP_IGNORE; + allow_duplicates = thr_get_trx(thr)->duplicates; /* Scan index records and check if there is a duplicate */ @@ -1841,7 +1853,7 @@ row_ins_duplicate_error_in_clust( sure that in roll-forward we get the same duplicate errors as in original execution */ - if (trx->duplicates & TRX_DUP_IGNORE) { + if (trx->duplicates) { /* If the SQL-query will update or replace duplicate key we will take X-lock for @@ -1885,7 +1897,7 @@ row_ins_duplicate_error_in_clust( offsets = rec_get_offsets(rec, cursor->index, offsets, ULINT_UNDEFINED, &heap); - if (trx->duplicates & TRX_DUP_IGNORE) { + if (trx->duplicates) { /* If the SQL-query will update or replace duplicate key we will take X-lock for @@ -2111,23 +2123,39 @@ row_ins_index_entry_low( ut_a(err == DB_SUCCESS); /* Write out the externally stored columns while still x-latching - index->lock and block->lock. We have - to mtr_commit(mtr) first, so that the - redo log will be written in the - correct order. Otherwise, we would run - into trouble on crash recovery if mtr - freed B-tree pages on which some of - the big_rec fields will be written. */ - btr_cur_mtr_commit_and_start(&cursor, &mtr); + index->lock and block->lock. Allocate + pages for big_rec in the mtr that + modified the B-tree, but be sure to skip + any pages that were freed in mtr. We will + write out the big_rec pages before + committing the B-tree mini-transaction. If + the system crashes so that crash recovery + will not replay the mtr_commit(&mtr), the + big_rec pages will be left orphaned until + the pages are allocated for something else. + + TODO: If the allocation extends the + tablespace, it will not be redo + logged, in either mini-transaction. + Tablespace extension should be + redo-logged in the big_rec + mini-transaction, so that recovery + will not fail when the big_rec was + written to the extended portion of the + file, in case the file was somehow + truncated in the crash. */ rec = btr_cur_get_rec(&cursor); offsets = rec_get_offsets( rec, index, NULL, ULINT_UNDEFINED, &heap); + DEBUG_SYNC_C("before_row_ins_upd_extern"); err = btr_store_big_rec_extern_fields( index, btr_cur_get_block(&cursor), - rec, offsets, &mtr, FALSE, big_rec); + rec, offsets, big_rec, &mtr, + BTR_STORE_INSERT_UPDATE); + DEBUG_SYNC_C("after_row_ins_upd_extern"); /* If writing big_rec fails (for example, because of DB_OUT_OF_FILE_SPACE), the record will be corrupted. Even if @@ -2138,7 +2166,13 @@ row_ins_index_entry_low( external storage. This non-update would not have been written to the undo log, and thus the record cannot - be rolled back. */ + be rolled back. + + However, because we have not executed + mtr_commit(mtr) yet, the update will + not be replayed in crash recovery, and + the following assertion failure will + effectively "roll back" the operation. */ ut_a(err == DB_SUCCESS); goto stored_big_rec; } @@ -2170,6 +2204,8 @@ function_exit: mtr_commit(&mtr); if (UNIV_LIKELY_NULL(big_rec)) { + rec_t* rec; + ulint* offsets; if (thr_get_trx(thr)->fake_changes) { /* skip store extern */ @@ -2186,8 +2222,13 @@ function_exit: return(err); } + DBUG_EXECUTE_IF( + "row_ins_extern_checkpoint", + log_make_checkpoint_at(IB_ULONGLONG_MAX, TRUE);); + mtr_start(&mtr); + DEBUG_SYNC_C("before_row_ins_extern_latch"); btr_cur_search_to_nth_level(index, 0, entry, PAGE_CUR_LE, BTR_MODIFY_TREE, &cursor, 0, __FILE__, __LINE__, &mtr); @@ -2195,9 +2236,11 @@ function_exit: offsets = rec_get_offsets(rec, index, NULL, ULINT_UNDEFINED, &heap); + DEBUG_SYNC_C("before_row_ins_extern"); err = btr_store_big_rec_extern_fields( index, btr_cur_get_block(&cursor), - rec, offsets, &mtr, FALSE, big_rec); + rec, offsets, big_rec, &mtr, BTR_STORE_INSERT); + DEBUG_SYNC_C("after_row_ins_extern"); stored_big_rec: if (modify) { diff --git a/storage/xtradb/row/row0merge.c b/storage/xtradb/row/row0merge.c index 782c029fbcc..efff92aa361 100644 --- a/storage/xtradb/row/row0merge.c +++ b/storage/xtradb/row/row0merge.c @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 2005, 2010, Innobase Oy. All Rights Reserved. +Copyright (c) 1995, 2012, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -576,7 +576,7 @@ row_merge_buf_write( REC_STATUS_ORDINARY, entry, n_fields, &extra_size); - ut_ad(size > extra_size); + ut_ad(size >= extra_size); ut_ad(extra_size >= REC_N_NEW_EXTRA_BYTES); extra_size -= REC_N_NEW_EXTRA_BYTES; size -= REC_N_NEW_EXTRA_BYTES; @@ -2019,7 +2019,7 @@ row_merge_drop_index( tables in Innobase. Deleting a row from SYS_INDEXES table also frees the file segments of the B-tree associated with the index. */ - static const char str1[] = + static const char sql[] = "PROCEDURE DROP_INDEX_PROC () IS\n" "BEGIN\n" /* Rename the index, so that it will be dropped by @@ -2045,9 +2045,19 @@ row_merge_drop_index( ut_a(trx->dict_operation_lock_mode == RW_X_LATCH); - err = que_eval_sql(info, str1, FALSE, trx); + err = que_eval_sql(info, sql, FALSE, trx); - ut_a(err == DB_SUCCESS); + + if (err != DB_SUCCESS) { + /* Even though we ensure that DDL transactions are WAIT + and DEADLOCK free, we could encounter other errors e.g., + DB_TOO_MANY_TRANSACTIONS. */ + trx->error_state = DB_SUCCESS; + + ut_print_timestamp(stderr); + fprintf(stderr, " InnoDB: Error: row_merge_drop_index failed " + "with error code: %lu.\n", (ulint) err); + } /* Replace this index with another equivalent index for all foreign key constraints on this table where this index is used */ @@ -2299,7 +2309,7 @@ row_merge_rename_indexes( /* We use the private SQL parser of Innobase to generate the query graphs needed in renaming indexes. */ - static const char rename_indexes[] = + static const char sql[] = "PROCEDURE RENAME_INDEXES_PROC () IS\n" "BEGIN\n" "UPDATE SYS_INDEXES SET NAME=SUBSTR(NAME,1,LENGTH(NAME)-1)\n" @@ -2315,7 +2325,7 @@ row_merge_rename_indexes( pars_info_add_dulint_literal(info, "tableid", table->id); - err = que_eval_sql(info, rename_indexes, FALSE, trx); + err = que_eval_sql(info, sql, FALSE, trx); if (err == DB_SUCCESS) { dict_index_t* index = dict_table_get_first_index(table); @@ -2325,6 +2335,15 @@ row_merge_rename_indexes( } index = dict_table_get_next_index(index); } while (index); + } else { + /* Even though we ensure that DDL transactions are WAIT + and DEADLOCK free, we could encounter other errors e.g., + DB_TOO_MANY_TRANSACTIONS. */ + trx->error_state = DB_SUCCESS; + + ut_print_timestamp(stderr); + fprintf(stderr, " InnoDB: Error: row_merge_rename_indexes " + "failed with error code: %lu.\n", (ulint) err); } trx->op_info = ""; @@ -2363,7 +2382,7 @@ row_merge_rename_tables( memcpy(old_name, old_table->name, strlen(old_table->name) + 1); } else { ut_print_timestamp(stderr); - fprintf(stderr, "InnoDB: too long table name: '%s', " + fprintf(stderr, " InnoDB: too long table name: '%s', " "max length is %d\n", old_table->name, MAX_FULL_NAME_LEN); ut_error; diff --git a/storage/xtradb/row/row0mysql.c b/storage/xtradb/row/row0mysql.c index cb003ad62e0..07cb1578024 100644 --- a/storage/xtradb/row/row0mysql.c +++ b/storage/xtradb/row/row0mysql.c @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 2000, 2010, Innobase Oy. All Rights Reserved. +Copyright (c) 2000, 2012, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -11,8 +11,8 @@ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with -this program; if not, write to the Free Software Foundation, Inc., 59 Temple -Place, Suite 330, Boston, MA 02111-1307 USA +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA *****************************************************************************/ @@ -54,6 +54,14 @@ Created 9/17/2000 Heikki Tuuri #include "ibuf0ibuf.h" #include "ha_prototypes.h" +#ifdef __WIN__ +/* error LNK2001: unresolved external symbol _debug_sync_C_callback_ptr */ +# define DEBUG_SYNC_C(dummy) ((void) 0) +#else +# include "m_string.h" /* for my_sys.h */ +# include "my_sys.h" /* DEBUG_SYNC_C */ +#endif + /** Provide optional 4.x backwards compatibility for 5.0 and above */ UNIV_INTERN ibool row_rollback_on_timeout = FALSE; @@ -1363,6 +1371,8 @@ row_update_for_mysql( return(DB_ERROR); } + DEBUG_SYNC_C("innodb_row_update_for_mysql_begin"); + trx->op_info = "updating or deleting"; row_mysql_delay_if_needed(); @@ -1915,6 +1925,20 @@ err_exit: } break; + case DB_TOO_MANY_CONCURRENT_TRXS: + /* We already have .ibd file here. it should be deleted. */ + + if (table->space && !fil_delete_tablespace(table->space)) { + ut_print_timestamp(stderr); + fprintf(stderr, + " InnoDB: Error: not able to" + " delete tablespace %lu of table ", + (ulong) table->space); + ut_print_name(stderr, trx, TRUE, table->name); + fputs("!\n", stderr); + } + /* fall through */ + case DB_DUPLICATE_KEY: default: /* We may also get err == DB_ERROR if the .ibd file for the @@ -2709,7 +2733,7 @@ row_import_tablespace_for_mysql( success = fil_open_single_table_tablespace( TRUE, table->space, table->flags == DICT_TF_COMPACT ? 0 : table->flags, - table->name); + table->name, trx); if (success) { table->ibd_file_missing = FALSE; table->tablespace_discarded = FALSE; @@ -3121,6 +3145,7 @@ row_drop_table_for_mysql( { dict_foreign_t* foreign; dict_table_t* table; + dict_index_t* index; ulint space_id; ulint err; const char* table_name; @@ -3327,6 +3352,18 @@ check_next_foreign: trx_set_dict_operation(trx, TRX_DICT_OP_TABLE); trx->table_id = table->id; + /* Mark all indexes unavailable in the data dictionary cache + before starting to drop the table. */ + + for (index = dict_table_get_first_index(table); + index != NULL; + index = dict_table_get_next_index(index)) { + rw_lock_x_lock(dict_index_get_lock(index)); + ut_ad(!index->to_be_dropped); + index->to_be_dropped = TRUE; + rw_lock_x_unlock(dict_index_get_lock(index)); + } + /* We use the private SQL parser of Innobase to generate the query graphs needed in deleting the dictionary data from system tables in Innobase. Deleting a row from SYS_INDEXES table also @@ -3343,6 +3380,19 @@ check_next_foreign: "index_id CHAR;\n" "foreign_id CHAR;\n" "found INT;\n" + + "DECLARE CURSOR cur_fk IS\n" + "SELECT ID FROM SYS_FOREIGN\n" + "WHERE FOR_NAME = :table_name\n" + "AND TO_BINARY(FOR_NAME)\n" + " = TO_BINARY(:table_name)\n" + "LOCK IN SHARE MODE;\n" + + "DECLARE CURSOR cur_idx IS\n" + "SELECT ID FROM SYS_INDEXES\n" + "WHERE TABLE_ID = table_id\n" + "LOCK IN SHARE MODE;\n" + "BEGIN\n" "SELECT ID INTO table_id\n" "FROM SYS_TABLES\n" @@ -3365,13 +3415,9 @@ check_next_foreign: "IF (:table_name = 'SYS_FOREIGN_COLS') THEN\n" " found := 0;\n" "END IF;\n" + "OPEN cur_fk;\n" "WHILE found = 1 LOOP\n" - " SELECT ID INTO foreign_id\n" - " FROM SYS_FOREIGN\n" - " WHERE FOR_NAME = :table_name\n" - " AND TO_BINARY(FOR_NAME)\n" - " = TO_BINARY(:table_name)\n" - " LOCK IN SHARE MODE;\n" + " FETCH cur_fk INTO foreign_id;\n" " IF (SQL % NOTFOUND) THEN\n" " found := 0;\n" " ELSE\n" @@ -3381,12 +3427,11 @@ check_next_foreign: " WHERE ID = foreign_id;\n" " END IF;\n" "END LOOP;\n" + "CLOSE cur_fk;\n" "found := 1;\n" + "OPEN cur_idx;\n" "WHILE found = 1 LOOP\n" - " SELECT ID INTO index_id\n" - " FROM SYS_INDEXES\n" - " WHERE TABLE_ID = table_id\n" - " LOCK IN SHARE MODE;\n" + " FETCH cur_idx INTO index_id;\n" " IF (SQL % NOTFOUND) THEN\n" " found := 0;\n" " ELSE\n" @@ -3399,6 +3444,7 @@ check_next_foreign: " AND TABLE_ID = table_id;\n" " END IF;\n" "END LOOP;\n" + "CLOSE cur_idx;\n" "DELETE FROM SYS_COLUMNS\n" "WHERE TABLE_ID = table_id;\n" "DELETE FROM SYS_TABLES\n" @@ -3485,6 +3531,17 @@ check_next_foreign: the undo log. We can directly exit here and return the DB_TOO_MANY_CONCURRENT_TRXS error. */ + + /* Mark all indexes available in the data dictionary + cache again. */ + + for (index = dict_table_get_first_index(table); + index != NULL; + index = dict_table_get_next_index(index)) { + rw_lock_x_lock(dict_index_get_lock(index)); + index->to_be_dropped = FALSE; + rw_lock_x_unlock(dict_index_get_lock(index)); + } break; case DB_OUT_OF_FILE_SPACE: @@ -3842,6 +3899,7 @@ row_rename_table_for_mysql( ulint n_constraints_to_drop = 0; ibool old_is_tmp, new_is_tmp; pars_info_t* info = NULL; + ulint retry = 0; ut_ad(trx->mysql_thread_id == os_thread_get_curr_id()); ut_a(old_name != NULL); @@ -3925,6 +3983,25 @@ row_rename_table_for_mysql( } } + /* Is a foreign key check running on this table? */ + for (retry = 0; retry < 100 + && table->n_foreign_key_checks_running > 0; ++retry) { + row_mysql_unlock_data_dictionary(trx); + os_thread_yield(); + row_mysql_lock_data_dictionary(trx); + } + + if (table->n_foreign_key_checks_running > 0) { + ut_print_timestamp(stderr); + fputs(" InnoDB: Error: in ALTER TABLE ", stderr); + ut_print_name(stderr, trx, TRUE, old_name); + fprintf(stderr, "\n" + "InnoDB: a FOREIGN KEY check is running.\n" + "InnoDB: Cannot rename table.\n"); + err = DB_TABLE_IN_FK_CHECK; + goto funct_exit; + } + /* We use the private SQL parser of Innobase to generate the query graphs needed in updating the dictionary data from system tables. */ @@ -4086,6 +4163,7 @@ end: trx->error_state = DB_SUCCESS; trx_general_rollback_for_mysql(trx, NULL); trx->error_state = DB_SUCCESS; + err = DB_ERROR; goto funct_exit; } diff --git a/storage/xtradb/row/row0purge.c b/storage/xtradb/row/row0purge.c index 752a2ec9e83..4d4c1afc458 100644 --- a/storage/xtradb/row/row0purge.c +++ b/storage/xtradb/row/row0purge.c @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1997, 2009, Innobase Oy. All Rights Reserved. +Copyright (c) 1997, 2011, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -11,8 +11,8 @@ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with -this program; if not, write to the Free Software Foundation, Inc., 59 Temple -Place, Suite 330, Boston, MA 02111-1307 USA +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA *****************************************************************************/ @@ -406,7 +406,8 @@ row_purge_upd_exist_or_extern_func( ut_ad(node); - if (node->rec_type == TRX_UNDO_UPD_DEL_REC) { + if (node->rec_type == TRX_UNDO_UPD_DEL_REC + || (node->cmpl_info & UPD_NODE_NO_ORD_CHANGE)) { goto skip_secondaries; } @@ -530,14 +531,14 @@ row_purge_parse_undo_rec( roll_ptr_t roll_ptr; ulint info_bits; ulint type; - ulint cmpl_info; ut_ad(node && thr); trx = thr_get_trx(thr); - ptr = trx_undo_rec_get_pars(node->undo_rec, &type, &cmpl_info, - updated_extern, &undo_no, &table_id); + ptr = trx_undo_rec_get_pars( + node->undo_rec, &type, &node->cmpl_info, + updated_extern, &undo_no, &table_id); node->rec_type = type; if (type == TRX_UNDO_UPD_DEL_REC && !(*updated_extern)) { @@ -550,7 +551,8 @@ row_purge_parse_undo_rec( node->table = NULL; if (type == TRX_UNDO_UPD_EXIST_REC - && cmpl_info & UPD_NODE_NO_ORD_CHANGE && !(*updated_extern)) { + && node->cmpl_info & UPD_NODE_NO_ORD_CHANGE + && !(*updated_extern)) { /* Purge requires no changes to indexes: we may return */ @@ -600,7 +602,7 @@ err_exit: /* Read to the partial row the fields that occur in indexes */ - if (!(cmpl_info & UPD_NODE_NO_ORD_CHANGE)) { + if (!(node->cmpl_info & UPD_NODE_NO_ORD_CHANGE)) { ptr = trx_undo_rec_get_partial_row( ptr, clust_index, &node->row, type == TRX_UNDO_UPD_DEL_REC, diff --git a/storage/xtradb/row/row0row.c b/storage/xtradb/row/row0row.c index cea70e98dee..380d438c59a 100644 --- a/storage/xtradb/row/row0row.c +++ b/storage/xtradb/row/row0row.c @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1996, 2011, Oracle and/or its affiliates. All Rights Reserved. +Copyright (c) 1996, 2012, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -11,8 +11,8 @@ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with -this program; if not, write to the Free Software Foundation, Inc., 59 Temple -Place, Suite 330, Boston, MA 02111-1307 USA +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA *****************************************************************************/ @@ -243,19 +243,16 @@ row_build( } #if defined UNIV_DEBUG || defined UNIV_BLOB_LIGHT_DEBUG - /* This condition can occur during crash recovery before - trx_rollback_active() has completed execution. - - This condition is possible if the server crashed - during an insert or update before - btr_store_big_rec_extern_fields() did mtr_commit() all - BLOB pointers to the clustered index record. - - If the record contains a null BLOB pointer, look up the - transaction that holds the implicit lock on this record, and - assert that it was recovered (and will soon be rolled back). */ - ut_a(!rec_offs_any_null_extern(rec, offsets) - || trx_assert_recovered(row_get_rec_trx_id(rec, index, offsets))); + if (rec_offs_any_null_extern(rec, offsets)) { + /* This condition can occur during crash recovery + before trx_rollback_active() has completed execution, + or when a concurrently executing + row_ins_index_entry_low() has committed the B-tree + mini-transaction but has not yet managed to restore + the cursor position for writing the big_rec. */ + ut_a(trx_undo_roll_ptr_is_insert( + row_get_rec_roll_ptr(rec, index, offsets))); + } #endif /* UNIV_DEBUG || UNIV_BLOB_LIGHT_DEBUG */ if (type != ROW_COPY_POINTERS) { diff --git a/storage/xtradb/row/row0sel.c b/storage/xtradb/row/row0sel.c index edfccfc495d..ba3db5bc022 100644 --- a/storage/xtradb/row/row0sel.c +++ b/storage/xtradb/row/row0sel.c @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1997, 2010, Innobase Oy. All Rights Reserved. +Copyright (c) 1997, 2011, Oracle and/or its affiliates. All Rights Reserved. Copyright (c) 2008, Google Inc. Portions of this file contain modifications contributed and copyrighted by @@ -101,12 +101,17 @@ row_sel_sec_rec_is_for_blob( ulint clust_len, /*!< in: length of clust_field */ const byte* sec_field, /*!< in: column in secondary index */ ulint sec_len, /*!< in: length of sec_field */ + ulint prefix_len, /*!< in: index column prefix length + in bytes */ ulint zip_size) /*!< in: compressed page size, or 0 */ { ulint len; byte buf[DICT_MAX_INDEX_COL_LEN]; ut_a(clust_len >= BTR_EXTERN_FIELD_REF_SIZE); + ut_ad(prefix_len >= sec_len); + ut_ad(prefix_len > 0); + ut_a(prefix_len <= sizeof buf); if (UNIV_UNLIKELY (!memcmp(clust_field + clust_len - BTR_EXTERN_FIELD_REF_SIZE, @@ -118,7 +123,7 @@ row_sel_sec_rec_is_for_blob( return(FALSE); } - len = btr_copy_externally_stored_field_prefix(buf, sizeof buf, + len = btr_copy_externally_stored_field_prefix(buf, prefix_len, zip_size, clust_field, clust_len); @@ -132,7 +137,7 @@ row_sel_sec_rec_is_for_blob( } len = dtype_get_at_most_n_mbchars(prtype, mbminlen, mbmaxlen, - sec_len, len, (const char*) buf); + prefix_len, len, (const char*) buf); return(!cmp_data_data(mtype, prtype, buf, len, sec_field, sec_len)); } @@ -219,11 +224,20 @@ row_sel_sec_rec_is_for_clust_rec( if (rec_offs_nth_extern(clust_offs, clust_pos) && len < sec_len) { + /* This function should never be + invoked on an Antelope format table, + because they should always contain + enough prefix in the clustered index + record. */ + ut_ad(dict_table_get_format(clust_index->table) + >= DICT_TF_FORMAT_ZIP); + if (!row_sel_sec_rec_is_for_blob( col->mtype, col->prtype, col->mbminlen, col->mbmaxlen, clust_field, clust_len, sec_field, sec_len, + ifield->prefix_len, dict_table_zip_size( clust_index->table))) { goto inequal; @@ -494,7 +508,7 @@ sel_col_prefetch_buf_alloc( sel_buf = column->prefetch_buf + i; sel_buf->data = NULL; - + sel_buf->len = 0; sel_buf->val_buf_size = 0; } } @@ -519,6 +533,8 @@ sel_col_prefetch_buf_free( mem_free(sel_buf->data); } } + + mem_free(prefetch_buf); } /*********************************************************************//** diff --git a/storage/xtradb/row/row0upd.c b/storage/xtradb/row/row0upd.c index 5765d3b76d2..56e55e89c82 100644 --- a/storage/xtradb/row/row0upd.c +++ b/storage/xtradb/row/row0upd.c @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1996, 2011, Oracle and/or its affiliates. All Rights Reserved. +Copyright (c) 1996, 2012, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -11,8 +11,8 @@ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with -this program; if not, write to the Free Software Foundation, Inc., 59 Temple -Place, Suite 330, Boston, MA 02111-1307 USA +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA *****************************************************************************/ @@ -23,6 +23,15 @@ Update of a row Created 12/27/1996 Heikki Tuuri *******************************************************/ +#ifdef __WIN__ +/* error LNK2001: unresolved external symbol _debug_sync_C_callback_ptr */ +# define DEBUG_SYNC_C(dummy) ((void) 0) +#else +# include "my_global.h" /* HAVE_* */ +# include "m_string.h" /* for my_sys.h */ +# include "my_sys.h" /* DEBUG_SYNC_C */ +#endif + #include "row0upd.h" #ifdef UNIV_NONINL @@ -1995,27 +2004,42 @@ row_upd_clust_rec( BTR_NO_LOCKING_FLAG | BTR_KEEP_POS_FLAG, btr_cur, &heap, &big_rec, node->update, node->cmpl_info, thr, mtr); /* skip store extern for fake_changes */ - if (big_rec && !(thr_get_trx(thr)->fake_changes)) { - ulint offsets_[REC_OFFS_NORMAL_SIZE]; - rec_t* rec; + if (err == DB_SUCCESS && big_rec && !(thr_get_trx(thr)->fake_changes)) { + ulint offsets_[REC_OFFS_NORMAL_SIZE]; + rec_t* rec; + rec_offs_init(offsets_); ut_a(err == DB_SUCCESS); - /* Write out the externally stored columns while still - x-latching index->lock and block->lock. We have to - mtr_commit(mtr) first, so that the redo log will be - written in the correct order. Otherwise, we would run - into trouble on crash recovery if mtr freed B-tree - pages on which some of the big_rec fields will be - written. */ - btr_cur_mtr_commit_and_start(btr_cur, mtr); + /* Write out the externally stored + columns while still x-latching + index->lock and block->lock. Allocate + pages for big_rec in the mtr that + modified the B-tree, but be sure to skip + any pages that were freed in mtr. We will + write out the big_rec pages before + committing the B-tree mini-transaction. If + the system crashes so that crash recovery + will not replay the mtr_commit(&mtr), the + big_rec pages will be left orphaned until + the pages are allocated for something else. + + TODO: If the allocation extends the tablespace, it + will not be redo logged, in either mini-transaction. + Tablespace extension should be redo-logged in the + big_rec mini-transaction, so that recovery will not + fail when the big_rec was written to the extended + portion of the file, in case the file was somehow + truncated in the crash. */ rec = btr_cur_get_rec(btr_cur); + DEBUG_SYNC_C("before_row_upd_extern"); err = btr_store_big_rec_extern_fields( index, btr_cur_get_block(btr_cur), rec, rec_get_offsets(rec, index, offsets_, ULINT_UNDEFINED, &heap), - mtr, TRUE, big_rec); + big_rec, mtr, BTR_STORE_UPDATE); + DEBUG_SYNC_C("after_row_upd_extern"); /* If writing big_rec fails (for example, because of DB_OUT_OF_FILE_SPACE), the record will be corrupted. Even if we did not update any externally stored @@ -2023,7 +2047,12 @@ row_upd_clust_rec( that a non-updated column was selected for external storage. This non-update would not have been written to the undo log, and thus the record cannot be rolled - back. */ + back. + + However, because we have not executed mtr_commit(mtr) + yet, the update will not be replayed in crash + recovery, and the following assertion failure will + effectively "roll back" the operation. */ ut_a(err == DB_SUCCESS); } diff --git a/storage/xtradb/scripts/export.sh b/storage/xtradb/scripts/export.sh new file mode 100644 index 00000000000..2a4355c1e43 --- /dev/null +++ b/storage/xtradb/scripts/export.sh @@ -0,0 +1,74 @@ +#!/bin/bash +# +# export current working directory in a format suitable for sending to MySQL +# as a snapshot. also generates the actual snapshot and sends it to MySQL. + +set -eu + +die () { + echo $* + exit 1 +} + +if [ $# -ne 2 ] ; then + die "Usage: export.sh revision-number-of-last-snapshot current-revision-number" +fi + +# If we are run from within the scripts/ directory then change directory to +# one level up so that the relative paths work. +DIR=`basename $PWD` + +if [ "${DIR}" = "scripts" ]; then + cd .. +fi + +START_REV=$(($1 + 1)) +END_REV=$2 + +set +u +if test -z $EDITOR; then + die "\$EDITOR is not set" +fi +set -u + +rm -rf to-mysql +mkdir to-mysql{,/storage,/patches,/mysql-test{,/t,/r,/include}} +svn log -v -r "$START_REV:BASE" > to-mysql/log +svn export -q . to-mysql/storage/innobase + +REV=$START_REV +while [ $REV -le $END_REV ] +do + PATCH=to-mysql/patches/r$REV.patch + svn log -v -r$REV > $PATCH + if [ $(wc -c < $PATCH) -gt 73 ] + then + svn diff -r$(($REV-1)):$REV >> $PATCH + else + rm $PATCH + fi + REV=$(($REV + 1)) +done + +cd to-mysql/storage/innobase + +mv mysql-test/*.test mysql-test/*.opt ../../mysql-test/t +mv mysql-test/*.result ../../mysql-test/r +mv mysql-test/*.inc ../../mysql-test/include +rmdir mysql-test + +rm setup.sh export.sh revert_gen.sh compile-innodb-debug compile-innodb + +cd ../.. +$EDITOR log +cd .. + +fname="innodb-5.1-ss$2.tar.gz" + +rm -f $fname +tar czf $fname to-mysql +scp $fname mysql:snapshots +rm $fname +rm -rf to-mysql + +echo "Sent $fname to MySQL" diff --git a/storage/xtradb/scripts/install_innodb_plugins.sql b/storage/xtradb/scripts/install_innodb_plugins.sql index 5a555a652f7..3fdb8f11e22 100644 --- a/storage/xtradb/scripts/install_innodb_plugins.sql +++ b/storage/xtradb/scripts/install_innodb_plugins.sql @@ -7,11 +7,3 @@ INSTALL PLUGIN innodb_cmp SONAME 'ha_innodb.so'; INSTALL PLUGIN innodb_cmp_reset SONAME 'ha_innodb.so'; INSTALL PLUGIN innodb_cmpmem SONAME 'ha_innodb.so'; INSTALL PLUGIN innodb_cmpmem_reset SONAME 'ha_innodb.so'; -INSTALL PLUGIN XTRADB_ENHANCEMENTS SONAME 'ha_innodb.so'; -INSTALL PLUGIN INNODB_BUFFER_POOL_PAGES SONAME 'ha_innodb.so'; -INSTALL PLUGIN INNODB_BUFFER_POOL_PAGES_BLOB SONAME 'ha_innodb.so'; -INSTALL PLUGIN INNODB_BUFFER_POOL_PAGES_INDEX SONAME 'ha_innodb.so'; -INSTALL PLUGIN innodb_rseg SONAME 'ha_innodb.so'; -INSTALL PLUGIN innodb_table_stats SONAME 'ha_innodb.so'; -INSTALL PLUGIN innodb_index_stats SONAME 'ha_innodb.so'; -INSTALL PLUGIN xtradb_admin_command SONAME 'ha_innodb.so'; diff --git a/storage/xtradb/scripts/install_innodb_plugins_win.sql b/storage/xtradb/scripts/install_innodb_plugins_win.sql index 7cda3335694..8c94b4e240d 100644 --- a/storage/xtradb/scripts/install_innodb_plugins_win.sql +++ b/storage/xtradb/scripts/install_innodb_plugins_win.sql @@ -7,11 +7,3 @@ INSTALL PLUGIN innodb_cmp SONAME 'ha_innodb.dll'; INSTALL PLUGIN innodb_cmp_reset SONAME 'ha_innodb.dll'; INSTALL PLUGIN innodb_cmpmem SONAME 'ha_innodb.dll'; INSTALL PLUGIN innodb_cmpmem_reset SONAME 'ha_innodb.dll'; -INSTALL PLUGIN XTRADB_ENHANCEMENTS SONAME 'ha_innodb.dll'; -INSTALL PLUGIN INNODB_BUFFER_POOL_PAGES SONAME 'ha_innodb.dll'; -INSTALL PLUGIN INNODB_BUFFER_POOL_PAGES_BLOB SONAME 'ha_innodb.dll'; -INSTALL PLUGIN INNODB_BUFFER_POOL_PAGES_INDEX SONAME 'ha_innodb.dll'; -INSTALL PLUGIN innodb_rseg SONAME 'ha_innodb.dll'; -INSTALL PLUGIN innodb_table_stats SONAME 'ha_innodb.dll'; -INSTALL PLUGIN innodb_index_stats SONAME 'ha_innodb.dll'; -INSTALL PLUGIN xtradb_admin_command SONAME 'ha_innodb.dll'; diff --git a/storage/xtradb/setup.sh b/storage/xtradb/setup.sh new file mode 100644 index 00000000000..b5d8299d411 --- /dev/null +++ b/storage/xtradb/setup.sh @@ -0,0 +1,47 @@ +#!/bin/sh +# +# Copyright (c) 1995, 2009, Innobase Oy. All Rights Reserved. +# +# This program is free software; you can redistribute it and/or modify it under +# the terms of the GNU General Public License as published by the Free Software +# Foundation; version 2 of the License. +# +# This program is distributed in the hope that it will be useful, but WITHOUT +# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS +# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License along with +# this program; if not, write to the Free Software Foundation, Inc., 59 Temple +# Place, Suite 330, Boston, MA 02111-1307 USA +# +# Prepare the MySQL source code tree for building +# with checked-out InnoDB Subversion directory. + +# This script assumes that the current directory is storage/innobase. + +set -eu + +TARGETDIR=../storage/innodb_plugin + +# link the build scripts +BUILDSCRIPTS="compile-innodb compile-innodb-debug" +for script in $BUILDSCRIPTS ; do + ln -sf $TARGETDIR/$script ../../BUILD/ +done + +cd ../../mysql-test/t +ln -sf ../$TARGETDIR/mysql-test/*.test ../$TARGETDIR/mysql-test/*.opt . +cd ../r +ln -sf ../$TARGETDIR/mysql-test/*.result . +cd ../include +ln -sf ../$TARGETDIR/mysql-test/*.inc . + +# Apply any patches that are needed to make the mysql-test suite successful. +# These patches are usually needed because of deviations of behavior between +# the stock InnoDB and the InnoDB Plugin. +cd ../.. +for patch in storage/innobase/mysql-test/patches/*.diff ; do + if [ "${patch}" != "storage/innobase/mysql-test/patches/*.diff" ] ; then + patch -p0 < ${patch} + fi +done diff --git a/storage/xtradb/sync/sync0rw.c b/storage/xtradb/sync/sync0rw.c index fe000e7d008..054423f9116 100644 --- a/storage/xtradb/sync/sync0rw.c +++ b/storage/xtradb/sync/sync0rw.c @@ -611,6 +611,9 @@ rw_lock_x_lock_func( ibool spinning = FALSE; ut_ad(rw_lock_validate(lock)); +#ifdef UNIV_SYNC_DEBUG + ut_ad(!rw_lock_own(lock, RW_LOCK_SHARED)); +#endif /* UNIV_SYNC_DEBUG */ i = 0; @@ -927,11 +930,13 @@ rw_lock_list_print_info( putc('\n', file); } + rw_lock_debug_mutex_enter(); info = UT_LIST_GET_FIRST(lock->debug_list); while (info != NULL) { rw_lock_debug_print(file, info); info = UT_LIST_GET_NEXT(list, info); } + rw_lock_debug_mutex_exit(); } #ifndef INNODB_RW_LOCKS_USE_ATOMICS mutex_exit(&(lock->mutex)); @@ -975,11 +980,13 @@ rw_lock_print( putc('\n', stderr); } + rw_lock_debug_mutex_enter(); info = UT_LIST_GET_FIRST(lock->debug_list); while (info != NULL) { rw_lock_debug_print(stderr, info); info = UT_LIST_GET_NEXT(list, info); } + rw_lock_debug_mutex_exit(); } } diff --git a/storage/xtradb/sync/sync0sync.c b/storage/xtradb/sync/sync0sync.c index 277a53e4fb2..18a961ac18b 100644 --- a/storage/xtradb/sync/sync0sync.c +++ b/storage/xtradb/sync/sync0sync.c @@ -1178,7 +1178,6 @@ sync_thread_add_level( case SYNC_BUF_ZIP_HASH: case SYNC_BUF_POOL: case SYNC_SEARCH_SYS: - case SYNC_SEARCH_SYS_CONF: case SYNC_TRX_LOCK_HEAP: case SYNC_KERNEL: case SYNC_IBUF_BITMAP_MUTEX: @@ -1191,6 +1190,7 @@ sync_thread_add_level( case SYNC_DICT_HEADER: case SYNC_TRX_I_S_RWLOCK: case SYNC_TRX_I_S_LAST_READ: + case SYNC_IBUF_MUTEX: if (!sync_thread_levels_g(array, level, TRUE)) { fprintf(stderr, "InnoDB: sync_thread_levels_g(array, %lu)" @@ -1254,21 +1254,32 @@ sync_thread_add_level( || sync_thread_levels_g(array, SYNC_TREE_NODE - 1, TRUE)); break; case SYNC_TREE_NODE_NEW: - ut_a(sync_thread_levels_contain(array, SYNC_FSP_PAGE) - || sync_thread_levels_contain(array, SYNC_IBUF_MUTEX)); + ut_a(sync_thread_levels_contain(array, SYNC_FSP_PAGE)); break; case SYNC_INDEX_TREE: - if (sync_thread_levels_contain(array, SYNC_IBUF_MUTEX) - && sync_thread_levels_contain(array, SYNC_FSP)) { - ut_a(sync_thread_levels_g(array, SYNC_FSP_PAGE - 1, - TRUE)); - } else { - ut_a(sync_thread_levels_g(array, SYNC_TREE_NODE - 1, - TRUE)); - } + ut_a(sync_thread_levels_g(array, SYNC_TREE_NODE - 1, TRUE)); break; - case SYNC_IBUF_MUTEX: - ut_a(sync_thread_levels_g(array, SYNC_FSP_PAGE - 1, TRUE)); + case SYNC_IBUF_TREE_NODE: + ut_a(sync_thread_levels_contain(array, SYNC_IBUF_INDEX_TREE) + || sync_thread_levels_g(array, SYNC_IBUF_TREE_NODE - 1, + TRUE)); + break; + case SYNC_IBUF_TREE_NODE_NEW: + /* ibuf_add_free_page() allocates new pages for the + change buffer while only holding the tablespace + x-latch. These pre-allocated new pages may only be + taken in use while holding ibuf_mutex, in + btr_page_alloc_for_ibuf(). */ + ut_a(sync_thread_levels_contain(array, SYNC_IBUF_MUTEX) + || sync_thread_levels_contain(array, SYNC_FSP)); + break; + case SYNC_IBUF_INDEX_TREE: + if (sync_thread_levels_contain(array, SYNC_FSP)) { + ut_a(sync_thread_levels_g(array, level - 1, TRUE)); + } else { + ut_a(sync_thread_levels_g( + array, SYNC_IBUF_TREE_NODE - 1, TRUE)); + } break; case SYNC_IBUF_PESS_INSERT_MUTEX: ut_a(sync_thread_levels_g(array, SYNC_FSP - 1, TRUE)); diff --git a/storage/xtradb/trx/trx0purge.c b/storage/xtradb/trx/trx0purge.c index 5a8b42af3af..6c49c5d7ff8 100644 --- a/storage/xtradb/trx/trx0purge.c +++ b/storage/xtradb/trx/trx0purge.c @@ -1111,7 +1111,7 @@ trx_purge(void) { que_thr_t* thr; /* que_thr_t* thr2; */ - ulint old_pages_handled; + ulonglong old_pages_handled; mutex_enter(&(purge_sys->mutex)); @@ -1210,7 +1210,7 @@ trx_purge(void) (ulong) purge_sys->n_pages_handled); } - return(purge_sys->n_pages_handled - old_pages_handled); + return((ulint) (purge_sys->n_pages_handled - old_pages_handled)); } /********************************************************************** diff --git a/storage/xtradb/trx/trx0rec.c b/storage/xtradb/trx/trx0rec.c index a7a393d31c8..124d22eec63 100644 --- a/storage/xtradb/trx/trx0rec.c +++ b/storage/xtradb/trx/trx0rec.c @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1996, 2011, Oracle and/or its affiliates. All Rights Reserved. +Copyright (c) 1996, 2012, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -11,8 +11,8 @@ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with -this program; if not, write to the Free Software Foundation, Inc., 59 Temple -Place, Suite 330, Boston, MA 02111-1307 USA +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA *****************************************************************************/ @@ -1110,13 +1110,14 @@ trx_undo_rec_get_partial_row( #endif /* !UNIV_HOTBACKUP */ /***********************************************************************//** -Erases the unused undo log page end. */ -static -void +Erases the unused undo log page end. +@return TRUE if the page contained something, FALSE if it was empty */ +static __attribute__((nonnull)) +ibool trx_undo_erase_page_end( /*====================*/ - page_t* undo_page, /*!< in: undo page whose end to erase */ - mtr_t* mtr) /*!< in: mtr */ + page_t* undo_page, /*!< in/out: undo page whose end to erase */ + mtr_t* mtr) /*!< in/out: mini-transaction */ { ulint first_free; @@ -1126,6 +1127,7 @@ trx_undo_erase_page_end( (UNIV_PAGE_SIZE - FIL_PAGE_DATA_END) - first_free); mlog_write_initial_log_record(undo_page, MLOG_UNDO_ERASE_END, mtr); + return(first_free != TRX_UNDO_PAGE_HDR + TRX_UNDO_PAGE_HDR_SIZE); } /***********************************************************//** @@ -1187,12 +1189,16 @@ trx_undo_report_row_operation( trx_t* trx; trx_undo_t* undo; ulint page_no; + buf_block_t* undo_block; trx_rseg_t* rseg; mtr_t mtr; ulint err = DB_SUCCESS; mem_heap_t* heap = NULL; ulint offsets_[REC_OFFS_NORMAL_SIZE]; ulint* offsets = offsets_; +#ifdef UNIV_DEBUG + int loop_count = 0; +#endif /* UNIV_DEBUG */ rec_offs_init(offsets_); ut_a(dict_index_is_clust(index)); @@ -1226,10 +1232,13 @@ trx_undo_report_row_operation( if (UNIV_UNLIKELY(!undo)) { /* Did not succeed */ + ut_ad(err != DB_SUCCESS); mutex_exit(&(trx->undo_mutex)); return(err); } + + ut_ad(err == DB_SUCCESS); } else { ut_ad(op_type == TRX_UNDO_MODIFY_OP); @@ -1243,30 +1252,30 @@ trx_undo_report_row_operation( if (UNIV_UNLIKELY(!undo)) { /* Did not succeed */ + ut_ad(err != DB_SUCCESS); mutex_exit(&(trx->undo_mutex)); return(err); } + ut_ad(err == DB_SUCCESS); offsets = rec_get_offsets(rec, index, offsets, ULINT_UNDEFINED, &heap); } - page_no = undo->last_page_no; - mtr_start(&mtr); - for (;;) { - buf_block_t* undo_block; + page_no = undo->last_page_no; + undo_block = buf_page_get_gen( + undo->space, undo->zip_size, page_no, RW_X_LATCH, + undo->guess_block, BUF_GET, __FILE__, __LINE__, &mtr); + buf_block_dbg_add_level(undo_block, SYNC_TRX_UNDO_PAGE); + + do { page_t* undo_page; ulint offset; - undo_block = buf_page_get_gen(undo->space, undo->zip_size, - page_no, RW_X_LATCH, - undo->guess_block, BUF_GET, - __FILE__, __LINE__, &mtr); - buf_block_dbg_add_level(undo_block, SYNC_TRX_UNDO_PAGE); - undo_page = buf_block_get_frame(undo_block); + ut_ad(page_no == buf_block_get_page_no(undo_block)); if (op_type == TRX_UNDO_INSERT_OP) { offset = trx_undo_page_report_insert( @@ -1284,7 +1293,31 @@ trx_undo_report_row_operation( version the replicate page constructed using the log records stays identical to the original page */ - trx_undo_erase_page_end(undo_page, &mtr); + if (!trx_undo_erase_page_end(undo_page, &mtr)) { + /* The record did not fit on an empty + undo page. Discard the freshly allocated + page and return an error. */ + + /* When we remove a page from an undo + log, this is analogous to a + pessimistic insert in a B-tree, and we + must reserve the counterpart of the + tree latch, which is the rseg + mutex. We must commit the mini-transaction + first, because it may be holding lower-level + latches, such as SYNC_FSP and SYNC_FSP_PAGE. */ + + mtr_commit(&mtr); + mtr_start(&mtr); + + mutex_enter(&rseg->mutex); + trx_undo_free_last_page(trx, undo, &mtr); + mutex_exit(&rseg->mutex); + + err = DB_TOO_BIG_RECORD; + goto err_exit; + } + mtr_commit(&mtr); } else { /* Success */ @@ -1304,39 +1337,39 @@ trx_undo_report_row_operation( *roll_ptr = trx_undo_build_roll_ptr( op_type == TRX_UNDO_INSERT_OP, rseg->id, page_no, offset); - if (UNIV_LIKELY_NULL(heap)) { - mem_heap_free(heap); - } - return(DB_SUCCESS); + err = DB_SUCCESS; + goto func_exit; } ut_ad(page_no == undo->last_page_no); /* We have to extend the undo log by one page */ + ut_ad(++loop_count < 2); mtr_start(&mtr); /* When we add a page to an undo log, this is analogous to a pessimistic insert in a B-tree, and we must reserve the counterpart of the tree latch, which is the rseg mutex. */ - mutex_enter(&(rseg->mutex)); + mutex_enter(&rseg->mutex); + undo_block = trx_undo_add_page(trx, undo, &mtr); + mutex_exit(&rseg->mutex); - page_no = trx_undo_add_page(trx, undo, &mtr); + page_no = undo->last_page_no; + } while (undo_block != NULL); - mutex_exit(&(rseg->mutex)); + /* Did not succeed: out of space */ + err = DB_OUT_OF_FILE_SPACE; - if (UNIV_UNLIKELY(page_no == FIL_NULL)) { - /* Did not succeed: out of space */ - - mutex_exit(&(trx->undo_mutex)); - mtr_commit(&mtr); - if (UNIV_LIKELY_NULL(heap)) { - mem_heap_free(heap); - } - return(DB_OUT_OF_FILE_SPACE); - } +err_exit: + mutex_exit(&trx->undo_mutex); + mtr_commit(&mtr); +func_exit: + if (UNIV_LIKELY_NULL(heap)) { + mem_heap_free(heap); } + return(err); } /*============== BUILDING PREVIOUS VERSION OF A RECORD ===============*/ diff --git a/storage/xtradb/trx/trx0sys.c b/storage/xtradb/trx/trx0sys.c index 6a15d4261eb..1f7e314a953 100644 --- a/storage/xtradb/trx/trx0sys.c +++ b/storage/xtradb/trx/trx0sys.c @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1996, 2010, Innobase Oy. All Rights Reserved. +Copyright (c) 1996, 2012, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -11,8 +11,8 @@ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with -this program; if not, write to the Free Software Foundation, Inc., 59 Temple -Place, Suite 330, Boston, MA 02111-1307 USA +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA *****************************************************************************/ @@ -131,6 +131,11 @@ static const char* file_format_name_map[] = { static const ulint FILE_FORMAT_NAME_N = sizeof(file_format_name_map) / sizeof(file_format_name_map[0]); +#ifdef UNIV_DEBUG +/* Flag to control TRX_RSEG_N_SLOTS behavior debugging. */ +uint trx_rseg_n_slots_debug = 0; +#endif + #ifndef UNIV_HOTBACKUP /** This is used to track the maximum file format id known to InnoDB. It's updated via SET GLOBAL innodb_file_format_check = 'x' or when we open @@ -246,9 +251,7 @@ trx_sys_create_doublewrite_buf(void) { buf_block_t* block; buf_block_t* block2; -#ifdef UNIV_SYNC_DEBUG buf_block_t* new_block; -#endif /* UNIV_SYNC_DEBUG */ byte* doublewrite; byte* fseg_header; ulint page_no; @@ -327,10 +330,9 @@ start_again: for (i = 0; i < 2 * TRX_SYS_DOUBLEWRITE_BLOCK_SIZE + FSP_EXTENT_SIZE / 2; i++) { - page_no = fseg_alloc_free_page(fseg_header, - prev_page_no + 1, - FSP_UP, &mtr); - if (page_no == FIL_NULL) { + new_block = fseg_alloc_free_page( + fseg_header, prev_page_no + 1, FSP_UP, &mtr); + if (new_block == NULL) { fprintf(stderr, "InnoDB: Cannot create doublewrite" " buffer: you must\n" @@ -351,13 +353,8 @@ start_again: the page position in the tablespace, then the page has not been written to in doublewrite. */ -#ifdef UNIV_SYNC_DEBUG - new_block = -#endif /* UNIV_SYNC_DEBUG */ - buf_page_get(TRX_SYS_SPACE, 0, page_no, - RW_X_LATCH, &mtr); - buf_block_dbg_add_level(new_block, - SYNC_NO_ORDER_CHECK); + ut_ad(rw_lock_get_x_lock_count(&new_block->lock) == 1); + page_no = buf_block_get_page_no(new_block); if (i == FSP_EXTENT_SIZE / 2) { ut_a(page_no == FSP_EXTENT_SIZE); @@ -474,10 +471,10 @@ start_again: for (i = 0; i < 2 * TRX_SYS_DOUBLEWRITE_BLOCK_SIZE + FSP_EXTENT_SIZE / 2; i++) { - page_no = fseg_alloc_free_page(fseg_header, + new_block = fseg_alloc_free_page(fseg_header, prev_page_no + 1, FSP_UP, &mtr); - if (page_no == FIL_NULL) { + if (new_block == NULL) { fprintf(stderr, "InnoDB: Cannot create doublewrite" " buffer: you must\n" @@ -498,13 +495,8 @@ start_again: the page position in the tablespace, then the page has not been written to in doublewrite. */ -#ifdef UNIV_SYNC_DEBUG - new_block = -#endif /* UNIV_SYNC_DEBUG */ - buf_page_get(TRX_DOUBLEWRITE_SPACE, 0, page_no, - RW_X_LATCH, &mtr); - buf_block_dbg_add_level(new_block, - SYNC_NO_ORDER_CHECK); + ut_ad(rw_lock_get_x_lock_count(&new_block->lock) == 1); + page_no = buf_block_get_page_no(new_block); if (i == FSP_EXTENT_SIZE / 2) { ut_a(page_no == FSP_EXTENT_SIZE); diff --git a/storage/xtradb/trx/trx0trx.c b/storage/xtradb/trx/trx0trx.c index bf042db4972..0cecbf2eea9 100644 --- a/storage/xtradb/trx/trx0trx.c +++ b/storage/xtradb/trx/trx0trx.c @@ -1078,6 +1078,8 @@ trx_commit_off_kernel( ut_ad(UT_LIST_GET_LEN(trx->trx_locks) == 0); UT_LIST_REMOVE(trx_list, trx_sys->trx_list, trx); + + trx->error_state = DB_SUCCESS; } /****************************************************************//** diff --git a/storage/xtradb/trx/trx0undo.c b/storage/xtradb/trx/trx0undo.c index ec1cd2d2c43..fd89936fd33 100644 --- a/storage/xtradb/trx/trx0undo.c +++ b/storage/xtradb/trx/trx0undo.c @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1996, 2009, Innobase Oy. All Rights Reserved. +Copyright (c) 1996, 2012, Oracle and/or its affiliates. All Rights Reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software @@ -11,8 +11,8 @@ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with -this program; if not, write to the Free Software Foundation, Inc., 59 Temple -Place, Suite 330, Boston, MA 02111-1307 USA +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA *****************************************************************************/ @@ -870,9 +870,9 @@ trx_undo_discard_latest_update_undo( #ifndef UNIV_HOTBACKUP /********************************************************************//** Tries to add a page to the undo log segment where the undo log is placed. -@return page number if success, else FIL_NULL */ +@return X-latched block if success, else NULL */ UNIV_INTERN -ulint +buf_block_t* trx_undo_add_page( /*==============*/ trx_t* trx, /*!< in: transaction */ @@ -882,11 +882,10 @@ trx_undo_add_page( the rollback segment mutex */ { page_t* header_page; + buf_block_t* new_block; page_t* new_page; trx_rseg_t* rseg; - ulint page_no; ulint n_reserved; - ibool success; ut_ad(mutex_own(&(trx->undo_mutex))); ut_ad(!mutex_own(&kernel_mutex)); @@ -896,37 +895,37 @@ trx_undo_add_page( if (rseg->curr_size == rseg->max_size) { - return(FIL_NULL); + return(NULL); } header_page = trx_undo_page_get(undo->space, undo->zip_size, undo->hdr_page_no, mtr); - success = fsp_reserve_free_extents(&n_reserved, undo->space, 1, - FSP_UNDO, mtr); - if (!success) { + if (!fsp_reserve_free_extents(&n_reserved, undo->space, 1, + FSP_UNDO, mtr)) { - return(FIL_NULL); + return(NULL); } - page_no = fseg_alloc_free_page_general(header_page + TRX_UNDO_SEG_HDR - + TRX_UNDO_FSEG_HEADER, - undo->top_page_no + 1, FSP_UP, - TRUE, mtr); + new_block = fseg_alloc_free_page_general( + TRX_UNDO_SEG_HDR + TRX_UNDO_FSEG_HEADER + + header_page, + undo->top_page_no + 1, FSP_UP, TRUE, mtr, mtr); fil_space_release_free_extents(undo->space, n_reserved); - if (page_no == FIL_NULL) { + if (new_block == NULL) { /* No space left */ - return(FIL_NULL); + return(NULL); } - undo->last_page_no = page_no; + ut_ad(rw_lock_get_x_lock_count(&new_block->lock) == 1); + buf_block_dbg_add_level(new_block, SYNC_TRX_UNDO_PAGE); + undo->last_page_no = buf_block_get_page_no(new_block); - new_page = trx_undo_page_get(undo->space, undo->zip_size, - page_no, mtr); + new_page = buf_block_get_frame(new_block); trx_undo_page_init(new_page, undo->type, mtr); @@ -935,7 +934,7 @@ trx_undo_add_page( undo->size++; rseg->curr_size++; - return(page_no); + return(new_block); } /********************************************************************//** @@ -998,29 +997,28 @@ trx_undo_free_page( } /********************************************************************//** -Frees an undo log page when there is also the memory object for the undo -log. */ -static +Frees the last undo log page. +The caller must hold the rollback segment mutex. */ +UNIV_INTERN void -trx_undo_free_page_in_rollback( -/*===========================*/ - trx_t* trx __attribute__((unused)), /*!< in: transaction */ - trx_undo_t* undo, /*!< in: undo log memory copy */ - ulint page_no,/*!< in: page number to free: must not be the - header page */ - mtr_t* mtr) /*!< in: mtr which does not have a latch to any - undo log page; the caller must have reserved - the rollback segment mutex */ +trx_undo_free_last_page_func( +/*==========================*/ +#ifdef UNIV_DEBUG + const trx_t* trx, /*!< in: transaction */ +#endif /* UNIV_DEBUG */ + trx_undo_t* undo, /*!< in/out: undo log memory copy */ + mtr_t* mtr) /*!< in/out: mini-transaction which does not + have a latch to any undo log page or which + has allocated the undo log page */ { - ulint last_page_no; + ut_ad(mutex_own(&trx->undo_mutex)); + ut_ad(undo->hdr_page_no != undo->last_page_no); + ut_ad(undo->size > 0); - ut_ad(undo->hdr_page_no != page_no); - ut_ad(mutex_own(&(trx->undo_mutex))); + undo->last_page_no = trx_undo_free_page( + undo->rseg, FALSE, undo->space, + undo->hdr_page_no, undo->last_page_no, mtr); - last_page_no = trx_undo_free_page(undo->rseg, FALSE, undo->space, - undo->hdr_page_no, page_no, mtr); - - undo->last_page_no = last_page_no; undo->size--; } @@ -1056,9 +1054,11 @@ Truncates an undo log from the end. This function is used during a rollback to free space from an undo log. */ UNIV_INTERN void -trx_undo_truncate_end( -/*==================*/ - trx_t* trx, /*!< in: transaction whose undo log it is */ +trx_undo_truncate_end_func( +/*=======================*/ +#ifdef UNIV_DEBUG + const trx_t* trx, /*!< in: transaction whose undo log it is */ +#endif /* UNIV_DEBUG */ trx_undo_t* undo, /*!< in: undo log */ undo_no_t limit) /*!< in: all undo records with undo number >= this value should be truncated */ @@ -1084,18 +1084,7 @@ trx_undo_truncate_end( rec = trx_undo_page_get_last_rec(undo_page, undo->hdr_page_no, undo->hdr_offset); - for (;;) { - if (rec == NULL) { - if (last_page_no == undo->hdr_page_no) { - - goto function_exit; - } - - trx_undo_free_page_in_rollback( - trx, undo, last_page_no, &mtr); - break; - } - + while (rec) { if (ut_dulint_cmp(trx_undo_rec_get_undo_no(rec), limit) >= 0) { /* Truncate at least this record off, maybe @@ -1110,6 +1099,14 @@ trx_undo_truncate_end( undo->hdr_offset); } + if (last_page_no == undo->hdr_page_no) { + + goto function_exit; + } + + ut_ad(last_page_no == undo->last_page_no); + trx_undo_free_last_page(trx, undo, &mtr); + mtr_commit(&mtr); } diff --git a/storage/xtradb/ut/ut0auxconf_atomic_pthread_t_gcc.c b/storage/xtradb/ut/ut0auxconf_atomic_pthread_t_gcc.c new file mode 100644 index 00000000000..30de5aa6f17 --- /dev/null +++ b/storage/xtradb/ut/ut0auxconf_atomic_pthread_t_gcc.c @@ -0,0 +1,43 @@ +/***************************************************************************** + +Copyright (c) 2009, Innobase Oy. All Rights Reserved. + +This program is free software; you can redistribute it and/or modify it under +the terms of the GNU General Public License as published by the Free Software +Foundation; version 2 of the License. + +This program is distributed in the hope that it will be useful, but WITHOUT +ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS +FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. + +You should have received a copy of the GNU General Public License along with +this program; if not, write to the Free Software Foundation, Inc., 59 Temple +Place, Suite 330, Boston, MA 02111-1307 USA + +*****************************************************************************/ + +/***************************************************************************** +If this program compiles, then pthread_t objects can be used as arguments +to GCC atomic builtin functions. + +Created March 5, 2009 Vasil Dimov +*****************************************************************************/ + +#include +#include + +int +main(int argc, char** argv) +{ + pthread_t x1; + pthread_t x2; + pthread_t x3; + + memset(&x1, 0x0, sizeof(x1)); + memset(&x2, 0x0, sizeof(x2)); + memset(&x3, 0x0, sizeof(x3)); + + __sync_bool_compare_and_swap(&x1, x2, x3); + + return(0); +} diff --git a/storage/xtradb/ut/ut0auxconf_atomic_pthread_t_solaris.c b/storage/xtradb/ut/ut0auxconf_atomic_pthread_t_solaris.c new file mode 100644 index 00000000000..310603c7503 --- /dev/null +++ b/storage/xtradb/ut/ut0auxconf_atomic_pthread_t_solaris.c @@ -0,0 +1,54 @@ +/***************************************************************************** + +Copyright (c) 2009, Innobase Oy. All Rights Reserved. + +This program is free software; you can redistribute it and/or modify it under +the terms of the GNU General Public License as published by the Free Software +Foundation; version 2 of the License. + +This program is distributed in the hope that it will be useful, but WITHOUT +ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS +FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. + +You should have received a copy of the GNU General Public License along with +this program; if not, write to the Free Software Foundation, Inc., 59 Temple +Place, Suite 330, Boston, MA 02111-1307 USA + +*****************************************************************************/ + +/***************************************************************************** +If this program compiles and returns 0, then pthread_t objects can be used as +arguments to Solaris libc atomic functions. + +Created April 18, 2009 Vasil Dimov +*****************************************************************************/ + +#include +#include + +int +main(int argc, char** argv) +{ + pthread_t x1; + pthread_t x2; + pthread_t x3; + + memset(&x1, 0x0, sizeof(x1)); + memset(&x2, 0x0, sizeof(x2)); + memset(&x3, 0x0, sizeof(x3)); + + if (sizeof(pthread_t) == 4) { + + atomic_cas_32(&x1, x2, x3); + + } else if (sizeof(pthread_t) == 8) { + + atomic_cas_64(&x1, x2, x3); + + } else { + + return(1); + } + + return(0); +} diff --git a/storage/xtradb/ut/ut0auxconf_have_gcc_atomics.c b/storage/xtradb/ut/ut0auxconf_have_gcc_atomics.c new file mode 100644 index 00000000000..da5c13d7d79 --- /dev/null +++ b/storage/xtradb/ut/ut0auxconf_have_gcc_atomics.c @@ -0,0 +1,61 @@ +/***************************************************************************** + +Copyright (c) 2009, Innobase Oy. All Rights Reserved. + +This program is free software; you can redistribute it and/or modify it under +the terms of the GNU General Public License as published by the Free Software +Foundation; version 2 of the License. + +This program is distributed in the hope that it will be useful, but WITHOUT +ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS +FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. + +You should have received a copy of the GNU General Public License along with +this program; if not, write to the Free Software Foundation, Inc., 59 Temple +Place, Suite 330, Boston, MA 02111-1307 USA + +*****************************************************************************/ + +/***************************************************************************** +If this program compiles and returns 0, then GCC atomic funcions are available. + +Created September 12, 2009 Vasil Dimov +*****************************************************************************/ + +int +main(int argc, char** argv) +{ + long x; + long y; + long res; + char c; + + x = 10; + y = 123; + res = __sync_bool_compare_and_swap(&x, x, y); + if (!res || x != y) { + return(1); + } + + x = 10; + y = 123; + res = __sync_bool_compare_and_swap(&x, x + 1, y); + if (res || x != 10) { + return(1); + } + + x = 10; + y = 123; + res = __sync_add_and_fetch(&x, y); + if (res != 123 + 10 || x != 123 + 10) { + return(1); + } + + c = 10; + res = __sync_lock_test_and_set(&c, 123); + if (res != 10 || c != 123) { + return(1); + } + + return(0); +} diff --git a/storage/xtradb/ut/ut0auxconf_have_solaris_atomics.c b/storage/xtradb/ut/ut0auxconf_have_solaris_atomics.c new file mode 100644 index 00000000000..7eb704edd4b --- /dev/null +++ b/storage/xtradb/ut/ut0auxconf_have_solaris_atomics.c @@ -0,0 +1,39 @@ +/***************************************************************************** + +Copyright (c) 2009, Innobase Oy. All Rights Reserved. + +This program is free software; you can redistribute it and/or modify it under +the terms of the GNU General Public License as published by the Free Software +Foundation; version 2 of the License. + +This program is distributed in the hope that it will be useful, but WITHOUT +ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS +FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. + +You should have received a copy of the GNU General Public License along with +this program; if not, write to the Free Software Foundation, Inc., 59 Temple +Place, Suite 330, Boston, MA 02111-1307 USA + +*****************************************************************************/ + +/***************************************************************************** +If this program compiles, then Solaris libc atomic funcions are available. + +Created April 18, 2009 Vasil Dimov +*****************************************************************************/ +#include + +int +main(int argc, char** argv) +{ + ulong_t ulong = 0; + uint32_t uint32 = 0; + uint64_t uint64 = 0; + + atomic_cas_ulong(&ulong, 0, 1); + atomic_cas_32(&uint32, 0, 1); + atomic_cas_64(&uint64, 0, 1); + atomic_add_long(&ulong, 0); + + return(0); +} diff --git a/storage/xtradb/ut/ut0auxconf_pause.c b/storage/xtradb/ut/ut0auxconf_pause.c new file mode 100644 index 00000000000..54d63bdd9bc --- /dev/null +++ b/storage/xtradb/ut/ut0auxconf_pause.c @@ -0,0 +1,32 @@ +/***************************************************************************** + +Copyright (c) 2009, Innobase Oy. All Rights Reserved. + +This program is free software; you can redistribute it and/or modify it under +the terms of the GNU General Public License as published by the Free Software +Foundation; version 2 of the License. + +This program is distributed in the hope that it will be useful, but WITHOUT +ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS +FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. + +You should have received a copy of the GNU General Public License along with +this program; if not, write to the Free Software Foundation, Inc., 59 Temple +Place, Suite 330, Boston, MA 02111-1307 USA + +*****************************************************************************/ + +/***************************************************************************** +If this program compiles and can be run and returns 0, then the pause +instruction is available. + +Created Jul 21, 2009 Vasil Dimov +*****************************************************************************/ + +int +main(int argc, char** argv) +{ + __asm__ __volatile__ ("pause"); + + return(0); +} diff --git a/storage/xtradb/ut/ut0auxconf_sizeof_pthread_t.c b/storage/xtradb/ut/ut0auxconf_sizeof_pthread_t.c new file mode 100644 index 00000000000..96add4526ef --- /dev/null +++ b/storage/xtradb/ut/ut0auxconf_sizeof_pthread_t.c @@ -0,0 +1,35 @@ +/***************************************************************************** + +Copyright (c) 2009, Innobase Oy. All Rights Reserved. + +This program is free software; you can redistribute it and/or modify it under +the terms of the GNU General Public License as published by the Free Software +Foundation; version 2 of the License. + +This program is distributed in the hope that it will be useful, but WITHOUT +ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS +FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. + +You should have received a copy of the GNU General Public License along with +this program; if not, write to the Free Software Foundation, Inc., 59 Temple +Place, Suite 330, Boston, MA 02111-1307 USA + +*****************************************************************************/ + +/***************************************************************************** +This program should compile and when run, print a single line like: +#define SIZEOF_PTHREAD_T %d + +Created April 18, 2009 Vasil Dimov +*****************************************************************************/ + +#include +#include + +int +main(int argc, char** argv) +{ + printf("#define SIZEOF_PTHREAD_T %d\n", (int) sizeof(pthread_t)); + + return(0); +} diff --git a/storage/xtradb/ut/ut0mem.c b/storage/xtradb/ut/ut0mem.c index 95fb2187b79..9f9eb1c4d49 100644 --- a/storage/xtradb/ut/ut0mem.c +++ b/storage/xtradb/ut/ut0mem.c @@ -84,17 +84,13 @@ ut_mem_init(void) #endif /* !UNIV_HOTBACKUP */ /**********************************************************************//** -Allocates memory. Sets it also to zero if UNIV_SET_MEM_TO_ZERO is -defined and set_to_zero is TRUE. +Allocates memory. @return own: allocated memory */ UNIV_INTERN void* ut_malloc_low( /*==========*/ ulint n, /*!< in: number of bytes to allocate */ - ibool set_to_zero, /*!< in: TRUE if allocated memory should be - set to zero if UNIV_SET_MEM_TO_ZERO is - defined */ ibool assert_on_error)/*!< in: if TRUE, we crash mysqld if the memory cannot be allocated */ { @@ -106,12 +102,6 @@ ut_malloc_low( ret = malloc(n); ut_a(ret || !assert_on_error); -#ifdef UNIV_SET_MEM_TO_ZERO - if (set_to_zero) { - memset(ret, '\0', n); - UNIV_MEM_ALLOC(ret, n); - } -#endif return(ret); } @@ -199,12 +189,6 @@ retry: #endif } - if (set_to_zero) { -#ifdef UNIV_SET_MEM_TO_ZERO - memset(ret, '\0', n + sizeof(ut_mem_block_t)); -#endif - } - UNIV_MEM_ALLOC(ret, n + sizeof(ut_mem_block_t)); ((ut_mem_block_t*)ret)->size = n + sizeof(ut_mem_block_t); @@ -221,74 +205,10 @@ retry: void* ret = malloc(n); ut_a(ret || !assert_on_error); -# ifdef UNIV_SET_MEM_TO_ZERO - if (set_to_zero) { - memset(ret, '\0', n); - } -# endif return(ret); #endif /* !UNIV_HOTBACKUP */ } -/**********************************************************************//** -Allocates memory. Sets it also to zero if UNIV_SET_MEM_TO_ZERO is -defined. -@return own: allocated memory */ -UNIV_INTERN -void* -ut_malloc( -/*======*/ - ulint n) /*!< in: number of bytes to allocate */ -{ -#ifndef UNIV_HOTBACKUP - return(ut_malloc_low(n, TRUE, TRUE)); -#else /* !UNIV_HOTBACKUP */ - return(malloc(n)); -#endif /* !UNIV_HOTBACKUP */ -} - -#ifndef UNIV_HOTBACKUP -/**********************************************************************//** -Tests if malloc of n bytes would succeed. ut_malloc() asserts if memory runs -out. It cannot be used if we want to return an error message. Prints to -stderr a message if fails. -@return TRUE if succeeded */ -UNIV_INTERN -ibool -ut_test_malloc( -/*===========*/ - ulint n) /*!< in: try to allocate this many bytes */ -{ - void* ret; - - ret = malloc(n); - - if (ret == NULL) { - ut_print_timestamp(stderr); - fprintf(stderr, - " InnoDB: Error: cannot allocate" - " %lu bytes of memory for\n" - "InnoDB: a BLOB with malloc! Total allocated memory\n" - "InnoDB: by InnoDB %lu bytes." - " Operating system errno: %d\n" - "InnoDB: Check if you should increase" - " the swap file or\n" - "InnoDB: ulimits of your operating system.\n" - "InnoDB: On FreeBSD check you have" - " compiled the OS with\n" - "InnoDB: a big enough maximum process size.\n", - (ulong) n, - (ulong) ut_total_allocated_memory, - (int) errno); - return(FALSE); - } - - free(ret); - - return(TRUE); -} -#endif /* !UNIV_HOTBACKUP */ - /**********************************************************************//** Frees a memory block allocated with ut_malloc. Freeing a NULL pointer is a nop. */ From 653492fb234028fd2ee81b6fbb0efc715d34254c Mon Sep 17 00:00:00 2001 From: Michael Widenius Date: Wed, 22 Aug 2012 18:03:31 +0300 Subject: [PATCH 119/164] More DBUG_ENTER, to make it easier to find out where free_root(thd->mem_root) is called --- sql/log_event.cc | 22 +++++++++++++--------- sql/sql_class.h | 2 ++ 2 files changed, 15 insertions(+), 9 deletions(-) diff --git a/sql/log_event.cc b/sql/log_event.cc index 6ef5a68e768..4d834941215 100644 --- a/sql/log_event.cc +++ b/sql/log_event.cc @@ -3534,6 +3534,7 @@ int Query_log_event::do_apply_event(Relay_log_info const *rli, LEX_STRING new_db; int expected_error,actual_error= 0; HA_CREATE_INFO db_options; + DBUG_ENTER("Query_log_event::do_apply_event"); /* Colleagues: please never free(thd->catalog) in MySQL. This would @@ -3929,7 +3930,7 @@ end: thd->first_successful_insert_id_in_prev_stmt= 0; thd->stmt_depends_on_first_successful_insert_id_in_prev_stmt= 0; free_root(thd->mem_root,MYF(MY_KEEP_PREALLOC)); - return thd->is_slave_error; + DBUG_RETURN(thd->is_slave_error); } int Query_log_event::do_update_pos(Relay_log_info *rli) @@ -5284,6 +5285,8 @@ int Load_log_event::do_apply_event(NET* net, Relay_log_info const *rli, bool use_rli_only_for_errors) { LEX_STRING new_db; + DBUG_ENTER("Load_log_event::do_apply_event"); + new_db.length= db_len; new_db.str= (char *) rpl_filter->get_rewrite_db(db, &new_db.length); thd->set_db(new_db.str, new_db.length); @@ -5524,7 +5527,7 @@ error: Error '%s' running LOAD DATA INFILE on table '%s'. Default database: '%s'", err, (char*)table_name, print_slave_db_safe(remember_db)); free_root(thd->mem_root,MYF(MY_KEEP_PREALLOC)); - return 1; + DBUG_RETURN(1); } free_root(thd->mem_root,MYF(MY_KEEP_PREALLOC)); @@ -5539,10 +5542,10 @@ Error '%s' running LOAD DATA INFILE on table '%s'. Default database: '%s'", rli->report(ERROR_LEVEL, ER_SLAVE_FATAL_ERROR, ER(ER_SLAVE_FATAL_ERROR), buf); - return 1; + DBUG_RETURN(1); } - return ( use_rli_only_for_errors ? 0 : Log_event::do_apply_event(rli) ); + DBUG_RETURN( use_rli_only_for_errors ? 0 : Log_event::do_apply_event(rli) ); } #endif @@ -6486,15 +6489,16 @@ int User_var_log_event::do_apply_event(Relay_log_info const *rli) { Item *it= 0; CHARSET_INFO *charset; + DBUG_ENTER("User_var_log_event::do_apply_event"); if (rli->deferred_events_collecting) { set_deferred(); - return rli->deferred_events->add(this); + DBUG_RETURN(rli->deferred_events->add(this)); } if (!(charset= get_charset(charset_number, MYF(MY_WME)))) - return 1; + DBUG_RETURN(1); LEX_STRING user_var_name; user_var_name.str= name; user_var_name.length= name_len; @@ -6540,7 +6544,7 @@ int User_var_log_event::do_apply_event(Relay_log_info const *rli) case ROW_RESULT: default: DBUG_ASSERT(0); - return 0; + DBUG_RETURN(0); } } @@ -6554,7 +6558,7 @@ int User_var_log_event::do_apply_event(Relay_log_info const *rli) error. */ if (e->fix_fields(thd, 0)) - return 1; + DBUG_RETURN(1); /* A variable can just be considered as a table with @@ -6566,7 +6570,7 @@ int User_var_log_event::do_apply_event(Relay_log_info const *rli) if (!is_deferred()) free_root(thd->mem_root, 0); - return 0; + DBUG_RETURN(0); } int User_var_log_event::do_update_pos(Relay_log_info *rli) diff --git a/sql/sql_class.h b/sql/sql_class.h index fa75e8a2048..845c2115922 100644 --- a/sql/sql_class.h +++ b/sql/sql_class.h @@ -1844,6 +1844,7 @@ public: MEM_ROOT mem_root; // Transaction-life memory allocation pool void cleanup() { + DBUG_ENTER("thd::cleanup"); changed_tables= 0; savepoints= 0; /* @@ -1855,6 +1856,7 @@ public: if (!xid_state.rm_error) xid_state.xid.null(); free_root(&mem_root,MYF(MY_KEEP_PREALLOC)); + DBUG_VOID_RETURN; } my_bool is_active() { From 8d69a0feaaf61a547e156c60a6c17e0e8282378f Mon Sep 17 00:00:00 2001 From: Sergei Golubchik Date: Wed, 22 Aug 2012 18:40:27 +0200 Subject: [PATCH 120/164] MDEV-472 mysql-test-run --valgrind main.ps_2myisam gives warning about not initialized memory Item::get_date() should return 1 unless the value is a valid date. --- sql/item_subselect.cc | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sql/item_subselect.cc b/sql/item_subselect.cc index 16f754575f5..bd55d196704 100644 --- a/sql/item_subselect.cc +++ b/sql/item_subselect.cc @@ -1218,7 +1218,7 @@ bool Item_singlerow_subselect::get_date(MYSQL_TIME *ltime,uint fuzzydate) else { reset(); - return 0; + return 1; } } From ef7389be51a992801709949531735282444ca1a9 Mon Sep 17 00:00:00 2001 From: Sergei Golubchik Date: Wed, 22 Aug 2012 23:33:45 +0200 Subject: [PATCH 121/164] MDEV-469 Debian/Ubuntu build dependencies for source package mariadb-5.5 does not includes "cmake" --- debian/dist/Debian/control | 2 +- debian/dist/Ubuntu/control | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/debian/dist/Debian/control b/debian/dist/Debian/control index 7a324c93895..4c58c5ea1b3 100644 --- a/debian/dist/Debian/control +++ b/debian/dist/Debian/control @@ -4,7 +4,7 @@ Priority: optional Maintainer: MariaDB Developers XSBC-Original-Maintainer: Maria Developers Uploaders: MariaDB Developers -Build-Depends: libtool (>= 1.4.2-7), procps | hurd, debhelper, file (>= 3.28), libncurses5-dev (>= 5.0-6), perl (>= 5.6.0), libwrap0-dev (>= 7.6-8.3), zlib1g-dev (>= 1:1.1.3-5), ${LIBREADLINE_DEV}, libevent-dev, libssl-dev, libpam0g-dev, psmisc, po-debconf, chrpath, automake1.9, doxygen, texlive-latex-base, ghostscript | gs-gpl, dpatch, gawk, bison, lsb-release, hardening-wrapper +Build-Depends: libtool (>= 1.4.2-7), procps | hurd, debhelper, file (>= 3.28), libncurses5-dev (>= 5.0-6), perl (>= 5.6.0), libwrap0-dev (>= 7.6-8.3), zlib1g-dev (>= 1:1.1.3-5), ${LIBREADLINE_DEV}, libevent-dev, libssl-dev, libpam0g-dev, psmisc, po-debconf, chrpath, automake1.9, doxygen, texlive-latex-base, ghostscript | gs-gpl, dpatch, gawk, bison, lsb-release, hardening-wrapper, cmake (>= 2.6), libaio-dev Standards-Version: 3.8.3 Homepage: http://mariadb.org/ Vcs-Browser: http://bazaar.launchpad.net/~maria-captains/maria/5.5/files diff --git a/debian/dist/Ubuntu/control b/debian/dist/Ubuntu/control index 8a8a93c37aa..9907c173e16 100644 --- a/debian/dist/Ubuntu/control +++ b/debian/dist/Ubuntu/control @@ -4,7 +4,7 @@ Priority: optional Maintainer: MariaDB Developers XSBC-Original-Maintainer: Maria Developers Uploaders: MariaDB Developers -Build-Depends: libtool (>= 1.4.2-7), procps | hurd, debhelper, file (>= 3.28), libncurses5-dev (>= 5.0-6), perl (>= 5.6.0), libwrap0-dev (>= 7.6-8.3), zlib1g-dev (>= 1:1.1.3-5), ${LIBREADLINE_DEV}, libevent-dev, libssl-dev, libpam0g-dev, psmisc, po-debconf, chrpath, automake1.9, doxygen, texlive-latex-base, ghostscript | gs-gpl, dpatch, gawk, bison, lsb-release, hardening-wrapper +Build-Depends: libtool (>= 1.4.2-7), procps | hurd, debhelper, file (>= 3.28), libncurses5-dev (>= 5.0-6), perl (>= 5.6.0), libwrap0-dev (>= 7.6-8.3), zlib1g-dev (>= 1:1.1.3-5), ${LIBREADLINE_DEV}, libevent-dev, libssl-dev, libpam0g-dev, psmisc, po-debconf, chrpath, automake1.9, doxygen, texlive-latex-base, ghostscript | gs-gpl, dpatch, gawk, bison, lsb-release, hardening-wrapper, cmake (>= 2.6), libaio-dev Standards-Version: 3.8.2 Homepage: http://mariadb.org/ Vcs-Browser: http://bazaar.launchpad.net/~maria-captains/maria/5.5/files From 4201939d575e3530d3c5e0fd9668d11062f70d79 Mon Sep 17 00:00:00 2001 From: Sergei Golubchik Date: Thu, 23 Aug 2012 13:52:36 +0200 Subject: [PATCH 122/164] remove mysql-5.1 assert that is already absent in mysql-5.5 --- storage/innobase/handler/ha_innodb.cc | 1 - storage/innodb_plugin/handler/ha_innodb.cc | 1 - storage/xtradb/handler/ha_innodb.cc | 1 - 3 files changed, 3 deletions(-) diff --git a/storage/innobase/handler/ha_innodb.cc b/storage/innobase/handler/ha_innodb.cc index 42f942bbef4..66f90dcebaa 100644 --- a/storage/innobase/handler/ha_innodb.cc +++ b/storage/innobase/handler/ha_innodb.cc @@ -6376,7 +6376,6 @@ ha_innobase::records_in_range( void* heap2; DBUG_ENTER("records_in_range"); - DBUG_ASSERT(min_key || max_key); ut_a(prebuilt->trx == thd_to_trx(ha_thd())); diff --git a/storage/innodb_plugin/handler/ha_innodb.cc b/storage/innodb_plugin/handler/ha_innodb.cc index 1deb2feaa25..4f6c2a40f2c 100644 --- a/storage/innodb_plugin/handler/ha_innodb.cc +++ b/storage/innodb_plugin/handler/ha_innodb.cc @@ -7458,7 +7458,6 @@ ha_innobase::records_in_range( mem_heap_t* heap; DBUG_ENTER("records_in_range"); - DBUG_ASSERT(min_key || max_key); ut_a(prebuilt->trx == thd_to_trx(ha_thd())); diff --git a/storage/xtradb/handler/ha_innodb.cc b/storage/xtradb/handler/ha_innodb.cc index 522ac5842d5..066c393fb4d 100644 --- a/storage/xtradb/handler/ha_innodb.cc +++ b/storage/xtradb/handler/ha_innodb.cc @@ -8196,7 +8196,6 @@ ha_innobase::records_in_range( mem_heap_t* heap; DBUG_ENTER("records_in_range"); - DBUG_ASSERT(min_key || max_key); ut_a(prebuilt->trx == thd_to_trx(ha_thd())); From ec263757b641a26ea7ce0e733db9dbe0d1dc70ca Mon Sep 17 00:00:00 2001 From: Sergei Golubchik Date: Thu, 23 Aug 2012 15:30:43 +0200 Subject: [PATCH 123/164] remove duplicate code from the factorial dbug example --- dbug/factorial.c | 14 -------------- 1 file changed, 14 deletions(-) diff --git a/dbug/factorial.c b/dbug/factorial.c index 7b190ea8d8e..e1cb77f0e30 100644 --- a/dbug/factorial.c +++ b/dbug/factorial.c @@ -1,14 +1,3 @@ -#ifdef DBUG_OFF /* We are testing dbug */ - -int factorial(register int value) { - if(value > 1) { - value *= factorial(value-1); - } - return value; -} - -#else - #include int factorial ( @@ -22,6 +11,3 @@ register int value) DBUG_PRINT ("result", ("result is %d", value)); DBUG_RETURN (value); } - -#endif - From df5aabba12844200fbb83f72e82239a106453e20 Mon Sep 17 00:00:00 2001 From: Sergei Golubchik Date: Thu, 23 Aug 2012 15:32:03 +0200 Subject: [PATCH 124/164] MDEV-469 Debian/Ubuntu build dependencies for source package mariadb-5.5 does not includes "cmake" only add cmake as a build dependency for distributions, where cmake is recent enough --- debian/autobake-deb.sh | 9 ++++++++- debian/dist/Debian/control | 2 +- debian/dist/Ubuntu/control | 2 +- 3 files changed, 10 insertions(+), 3 deletions(-) diff --git a/debian/autobake-deb.sh b/debian/autobake-deb.sh index d2288ee8b42..d4a1fa70d8c 100755 --- a/debian/autobake-deb.sh +++ b/debian/autobake-deb.sh @@ -37,6 +37,11 @@ case "${CODENAME}" in *) LIBREADLINE_DEV=libreadline-gplv2-dev ;; esac +case "${CODENAME}" in + etch|lenny|hardy|intrepid|jaunty|karmic) CMAKE_DEP='' ;; + *) CMAKE_DEP='cmake (>= 2.7), ' ;; +esac + # Clean up build file symlinks that are distro-specific. First remove all, then set # new links. DISTRODIRS="$(ls ./debian/dist)" @@ -53,7 +58,9 @@ echo "Copying distribution specific build files for ${DISTRO}" DISTROFILES="$(ls ./debian/dist/${DISTRO})" for distrofile in ${DISTROFILES}; do rm -f "./debian/${distrofile}" - sed -e "s/\\\${LIBREADLINE_DEV}/${LIBREADLINE_DEV}/g" < "./debian/dist/${DISTRO}/${distrofile}" > "./debian/${distrofile}" + sed -e "s/\\\${LIBREADLINE_DEV}/${LIBREADLINE_DEV}/g" \ + -e "s/\\\${CMAKE_DEP}/${CMAKE_DEP}/g" \ + < "./debian/dist/${DISTRO}/${distrofile}" > "./debian/${distrofile}" chmod --reference="./debian/dist/${DISTRO}/${distrofile}" "./debian/${distrofile}" done; diff --git a/debian/dist/Debian/control b/debian/dist/Debian/control index 4c58c5ea1b3..95bde727093 100644 --- a/debian/dist/Debian/control +++ b/debian/dist/Debian/control @@ -4,7 +4,7 @@ Priority: optional Maintainer: MariaDB Developers XSBC-Original-Maintainer: Maria Developers Uploaders: MariaDB Developers -Build-Depends: libtool (>= 1.4.2-7), procps | hurd, debhelper, file (>= 3.28), libncurses5-dev (>= 5.0-6), perl (>= 5.6.0), libwrap0-dev (>= 7.6-8.3), zlib1g-dev (>= 1:1.1.3-5), ${LIBREADLINE_DEV}, libevent-dev, libssl-dev, libpam0g-dev, psmisc, po-debconf, chrpath, automake1.9, doxygen, texlive-latex-base, ghostscript | gs-gpl, dpatch, gawk, bison, lsb-release, hardening-wrapper, cmake (>= 2.6), libaio-dev +Build-Depends: libtool (>= 1.4.2-7), procps | hurd, debhelper, file (>= 3.28), libncurses5-dev (>= 5.0-6), perl (>= 5.6.0), libwrap0-dev (>= 7.6-8.3), zlib1g-dev (>= 1:1.1.3-5), ${LIBREADLINE_DEV}, libevent-dev, libssl-dev, libpam0g-dev, psmisc, po-debconf, chrpath, automake1.9, doxygen, texlive-latex-base, ghostscript | gs-gpl, dpatch, gawk, bison, lsb-release, hardening-wrapper, ${CMAKE_DEP}libaio-dev Standards-Version: 3.8.3 Homepage: http://mariadb.org/ Vcs-Browser: http://bazaar.launchpad.net/~maria-captains/maria/5.5/files diff --git a/debian/dist/Ubuntu/control b/debian/dist/Ubuntu/control index 9907c173e16..70ef5fd2ecf 100644 --- a/debian/dist/Ubuntu/control +++ b/debian/dist/Ubuntu/control @@ -4,7 +4,7 @@ Priority: optional Maintainer: MariaDB Developers XSBC-Original-Maintainer: Maria Developers Uploaders: MariaDB Developers -Build-Depends: libtool (>= 1.4.2-7), procps | hurd, debhelper, file (>= 3.28), libncurses5-dev (>= 5.0-6), perl (>= 5.6.0), libwrap0-dev (>= 7.6-8.3), zlib1g-dev (>= 1:1.1.3-5), ${LIBREADLINE_DEV}, libevent-dev, libssl-dev, libpam0g-dev, psmisc, po-debconf, chrpath, automake1.9, doxygen, texlive-latex-base, ghostscript | gs-gpl, dpatch, gawk, bison, lsb-release, hardening-wrapper, cmake (>= 2.6), libaio-dev +Build-Depends: libtool (>= 1.4.2-7), procps | hurd, debhelper, file (>= 3.28), libncurses5-dev (>= 5.0-6), perl (>= 5.6.0), libwrap0-dev (>= 7.6-8.3), zlib1g-dev (>= 1:1.1.3-5), ${LIBREADLINE_DEV}, libevent-dev, libssl-dev, libpam0g-dev, psmisc, po-debconf, chrpath, automake1.9, doxygen, texlive-latex-base, ghostscript | gs-gpl, dpatch, gawk, bison, lsb-release, hardening-wrapper, ${CMAKE_DEP}libaio-dev Standards-Version: 3.8.2 Homepage: http://mariadb.org/ Vcs-Browser: http://bazaar.launchpad.net/~maria-captains/maria/5.5/files From 6c3a756dd92af851f421bd9791d4b6b95063b484 Mon Sep 17 00:00:00 2001 From: Sergei Golubchik Date: Thu, 23 Aug 2012 15:36:38 +0200 Subject: [PATCH 125/164] MDEV-439 cmake -DWITHOUT_SERVER does not work fix mysys/waiting_threads.c to compile w/o performance schema include clients. scripts and manpages in -DWITHOUT_SERVER --- CMakeLists.txt | 19 ++++++++++--------- mysys/waiting_threads.c | 2 ++ 2 files changed, 12 insertions(+), 9 deletions(-) diff --git a/CMakeLists.txt b/CMakeLists.txt index 2599a025e27..dd4f135bf4b 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -298,14 +298,16 @@ ADD_SUBDIRECTORY(vio) ADD_SUBDIRECTORY(regex) ADD_SUBDIRECTORY(mysys) ADD_SUBDIRECTORY(libmysql) - +ADD_SUBDIRECTORY(client) ADD_SUBDIRECTORY(extra) +ADD_SUBDIRECTORY(libservices) +ADD_SUBDIRECTORY(scripts) +ADD_SUBDIRECTORY(sql/share) +ADD_SUBDIRECTORY(support-files) + IF(NOT WITHOUT_SERVER) ADD_SUBDIRECTORY(tests) - ADD_SUBDIRECTORY(client) ADD_SUBDIRECTORY(sql) - ADD_SUBDIRECTORY(sql/share) - ADD_SUBDIRECTORY(libservices) OPTION (WITH_EMBEDDED_SERVER "Compile MySQL with embedded server" OFF) IF(WITH_EMBEDDED_SERVER) ADD_SUBDIRECTORY(libmysqld) @@ -314,12 +316,11 @@ IF(NOT WITHOUT_SERVER) ADD_SUBDIRECTORY(mysql-test) ADD_SUBDIRECTORY(mysql-test/lib/My/SafeProcess) - ADD_SUBDIRECTORY(support-files) - ADD_SUBDIRECTORY(scripts) ADD_SUBDIRECTORY(sql-bench) - IF(UNIX) - ADD_SUBDIRECTORY(man) - ENDIF() +ENDIF() + +IF(UNIX) + ADD_SUBDIRECTORY(man) ENDIF() INCLUDE(cmake/abi_check.cmake) diff --git a/mysys/waiting_threads.c b/mysys/waiting_threads.c index f7e74e012d2..0a9474e68b4 100644 --- a/mysys/waiting_threads.c +++ b/mysys/waiting_threads.c @@ -193,7 +193,9 @@ uint32 wt_success_stats; static my_atomic_rwlock_t cycle_stats_lock, wait_stats_lock, success_stats_lock; +#ifdef HAVE_PSI_INTERFACE extern PSI_cond_key key_WT_RESOURCE_cond; +#endif #ifdef SAFE_STATISTICS #define incr(VAR, LOCK) \ From cdeabcfd436c65e0a97e74b1722d0259ba907541 Mon Sep 17 00:00:00 2001 From: unknown Date: Fri, 24 Aug 2012 10:06:16 +0200 Subject: [PATCH 126/164] MDEV-382: Incorrect quoting Various places in the server replication code was incorrectly quoting strings, which could lead to incorrect SQL on the slave/mysqlbinlog. --- include/my_sys.h | 2 + mysql-test/r/func_compress.result | 4 +- mysql-test/r/mysqlbinlog.result | 32 +- mysql-test/r/mysqlbinlog2.result | 70 ++-- mysql-test/r/mysqlbinlog_row.result | 2 +- mysql-test/r/mysqlbinlog_row_innodb.result | 8 +- mysql-test/r/mysqlbinlog_row_myisam.result | 8 +- mysql-test/r/mysqlbinlog_row_trans.result | 2 +- mysql-test/r/user_var-binlog.result | 2 +- mysql-test/r/variables.result | 2 +- .../suite/binlog/r/binlog_base64_flag.result | 2 +- .../binlog/r/binlog_stm_ctype_ucs.result | 2 +- .../r/binlog_stm_mix_innodb_myisam.result | 4 +- mysql-test/suite/rpl/r/rpl_mdev382.result | 275 +++++++++++++ .../suite/rpl/r/rpl_row_mysqlbinlog.result | 8 +- mysql-test/suite/rpl/r/rpl_sp.result | 12 +- mysql-test/suite/rpl/t/rpl_mdev382.test | 249 ++++++++++++ mysys/mf_iocache2.c | 54 ++- sql/ha_ndbcluster_binlog.cc | 25 +- sql/item.cc | 18 +- sql/item.h | 1 + sql/item_func.cc | 6 +- sql/item_func.h | 2 +- sql/log.cc | 11 +- sql/log_event.cc | 381 +++++++++--------- sql/log_event.h | 47 ++- sql/log_event_old.cc | 2 +- sql/log_event_old.h | 2 +- sql/mysql_priv.h | 2 +- sql/sql_base.cc | 22 +- sql/sql_db.cc | 41 +- sql/sql_insert.cc | 14 +- sql/sql_load.cc | 91 ++--- sql/sql_repl.cc | 2 +- sql/sql_show.cc | 24 +- sql/sql_string.cc | 28 +- sql/sql_string.h | 1 + sql/sql_table.cc | 21 +- strings/my_vsnprintf.c | 129 +++++- 39 files changed, 1164 insertions(+), 444 deletions(-) create mode 100644 mysql-test/suite/rpl/r/rpl_mdev382.result create mode 100644 mysql-test/suite/rpl/t/rpl_mdev382.test diff --git a/include/my_sys.h b/include/my_sys.h index 93f413092e0..626c434bb89 100644 --- a/include/my_sys.h +++ b/include/my_sys.h @@ -806,6 +806,8 @@ extern size_t my_b_fill(IO_CACHE *info); extern void my_b_seek(IO_CACHE *info,my_off_t pos); extern size_t my_b_gets(IO_CACHE *info, char *to, size_t max_length); extern my_off_t my_b_filelength(IO_CACHE *info); +extern size_t my_b_write_backtick_quote(IO_CACHE *info, const char *str, + size_t len); extern size_t my_b_printf(IO_CACHE *info, const char* fmt, ...); extern size_t my_b_vprintf(IO_CACHE *info, const char* fmt, va_list ap); extern int init_strvar_from_file(char *var, int max_size, IO_CACHE *f, diff --git a/mysql-test/r/func_compress.result b/mysql-test/r/func_compress.result index b4e61d0e4fc..37f7c475148 100644 --- a/mysql-test/r/func_compress.result +++ b/mysql-test/r/func_compress.result @@ -11,7 +11,7 @@ explain extended select uncompress(compress(@test_compress_string)); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used Warnings: -Note 1003 select uncompress(compress((@test_compress_string))) AS `uncompress(compress(@test_compress_string))` +Note 1003 select uncompress(compress((@`test_compress_string`))) AS `uncompress(compress(@test_compress_string))` select uncompressed_length(compress(@test_compress_string))=length(@test_compress_string); uncompressed_length(compress(@test_compress_string))=length(@test_compress_string) 1 @@ -19,7 +19,7 @@ explain extended select uncompressed_length(compress(@test_compress_string))=len id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used Warnings: -Note 1003 select (uncompressed_length(compress((@test_compress_string))) = length((@test_compress_string))) AS `uncompressed_length(compress(@test_compress_string))=length(@test_compress_string)` +Note 1003 select (uncompressed_length(compress((@`test_compress_string`))) = length((@`test_compress_string`))) AS `uncompressed_length(compress(@test_compress_string))=length(@test_compress_string)` select uncompressed_length(compress(@test_compress_string)); uncompressed_length(compress(@test_compress_string)) 117 diff --git a/mysql-test/r/mysqlbinlog.result b/mysql-test/r/mysqlbinlog.result index 45068ddfaec..540ecd99479 100644 --- a/mysql-test/r/mysqlbinlog.result +++ b/mysql-test/r/mysqlbinlog.result @@ -18,7 +18,7 @@ flush logs; /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; DELIMITER /*!*/; ROLLBACK/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1000000000/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -64,7 +64,7 @@ ROLLBACK /* added by mysqlbinlog */; /*!40019 SET @@session.max_insert_delayed_threads=0*/; /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; DELIMITER /*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1000000000/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -97,7 +97,7 @@ Warning: The option '--position' is deprecated and will be removed in a future r /*!40019 SET @@session.max_insert_delayed_threads=0*/; /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; DELIMITER /*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1000000000/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -119,7 +119,7 @@ ROLLBACK /* added by mysqlbinlog */; /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; DELIMITER /*!*/; ROLLBACK/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1000000000/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -165,7 +165,7 @@ ROLLBACK /* added by mysqlbinlog */; /*!40019 SET @@session.max_insert_delayed_threads=0*/; /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; DELIMITER /*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1000000000/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -198,7 +198,7 @@ Warning: The option '--position' is deprecated and will be removed in a future r /*!40019 SET @@session.max_insert_delayed_threads=0*/; /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; DELIMITER /*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1000000000/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -220,7 +220,7 @@ ROLLBACK /* added by mysqlbinlog */; /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; DELIMITER /*!*/; ROLLBACK/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1108844556/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/; @@ -239,7 +239,7 @@ Warning: The option '--position' is deprecated and will be removed in a future r /*!40019 SET @@session.max_insert_delayed_threads=0*/; /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; DELIMITER /*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1108844556/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/; @@ -299,7 +299,7 @@ ERROR 42000: PROCEDURE test.p1 does not exist /*!40019 SET @@session.max_insert_delayed_threads=0*/; /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; DELIMITER /*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1000000000/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -349,7 +349,7 @@ flush logs; /*!40019 SET @@session.max_insert_delayed_threads=0*/; /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; DELIMITER /*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1000000000/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -484,7 +484,7 @@ FLUSH LOGS; /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; DELIMITER /*!*/; ROLLBACK/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1253783037/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -581,22 +581,22 @@ SET @@session.lc_time_names=0/*!*/; SET @@session.collation_database=DEFAULT/*!*/; BEGIN /*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1266652094/*!*/; SavePoint mixed_cases /*!*/; -use db1/*!*/; +use `db1`/*!*/; SET TIMESTAMP=1266652094/*!*/; INSERT INTO db1.t2 VALUES("in savepoint mixed_cases") /*!*/; SET TIMESTAMP=1266652094/*!*/; INSERT INTO db1.t1 VALUES(40) /*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1266652094/*!*/; ROLLBACK TO mixed_cases /*!*/; -use db1/*!*/; +use `db1`/*!*/; SET TIMESTAMP=1266652094/*!*/; INSERT INTO db1.t2 VALUES("after rollback to") /*!*/; @@ -624,7 +624,7 @@ SET @@session.lc_time_names=0/*!*/; SET @@session.collation_database=DEFAULT/*!*/; BEGIN /*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1266652094/*!*/; SavePoint mixed_cases /*!*/; diff --git a/mysql-test/r/mysqlbinlog2.result b/mysql-test/r/mysqlbinlog2.result index dba9bdc9d70..ab97f0fe51b 100644 --- a/mysql-test/r/mysqlbinlog2.result +++ b/mysql-test/r/mysqlbinlog2.result @@ -19,7 +19,7 @@ insert into t1 values(null, "f"); /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; DELIMITER /*!*/; ROLLBACK/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1579609942/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -62,7 +62,7 @@ ROLLBACK /* added by mysqlbinlog */; DELIMITER /*!*/; ROLLBACK/*!*/; SET INSERT_ID=1/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1579609942/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -101,7 +101,7 @@ ROLLBACK /* added by mysqlbinlog */; DELIMITER /*!*/; ROLLBACK/*!*/; SET INSERT_ID=4/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1579609946/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -127,7 +127,7 @@ ROLLBACK /* added by mysqlbinlog */; /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; DELIMITER /*!*/; ROLLBACK/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1579609942/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -162,7 +162,7 @@ ROLLBACK /* added by mysqlbinlog */; DELIMITER /*!*/; ROLLBACK/*!*/; SET INSERT_ID=4/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1579609946/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -185,7 +185,7 @@ ROLLBACK /* added by mysqlbinlog */; DELIMITER /*!*/; ROLLBACK/*!*/; SET INSERT_ID=3/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1579609944/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -215,7 +215,7 @@ ROLLBACK /* added by mysqlbinlog */; /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; DELIMITER /*!*/; ROLLBACK/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1579609942/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -246,7 +246,7 @@ flush logs; /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; DELIMITER /*!*/; ROLLBACK/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1579609942/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -281,7 +281,7 @@ insert into t1 values(null, "e") DELIMITER ; DELIMITER /*!*/; SET INSERT_ID=6/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1579609943/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -304,7 +304,7 @@ ROLLBACK /* added by mysqlbinlog */; DELIMITER /*!*/; ROLLBACK/*!*/; SET INSERT_ID=1/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1579609942/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -335,7 +335,7 @@ insert into t1 values(null, "e") DELIMITER ; DELIMITER /*!*/; SET INSERT_ID=6/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1579609943/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -358,7 +358,7 @@ ROLLBACK /* added by mysqlbinlog */; DELIMITER /*!*/; ROLLBACK/*!*/; SET INSERT_ID=4/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1579609946/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -377,7 +377,7 @@ insert into t1 values(null, "e") DELIMITER ; DELIMITER /*!*/; SET INSERT_ID=6/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1579609943/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -399,7 +399,7 @@ ROLLBACK /* added by mysqlbinlog */; /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; DELIMITER /*!*/; ROLLBACK/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1579609942/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -445,7 +445,7 @@ ROLLBACK /* added by mysqlbinlog */; DELIMITER /*!*/; ROLLBACK/*!*/; SET INSERT_ID=3/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1579609944/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -468,7 +468,7 @@ insert into t1 values(null, "e") DELIMITER ; DELIMITER /*!*/; SET INSERT_ID=6/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1579609943/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -490,7 +490,7 @@ ROLLBACK /* added by mysqlbinlog */; /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; DELIMITER /*!*/; ROLLBACK/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1579609942/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -520,7 +520,7 @@ ROLLBACK /* added by mysqlbinlog */; /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; DELIMITER /*!*/; ROLLBACK/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1579609942/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -563,7 +563,7 @@ ROLLBACK /* added by mysqlbinlog */; DELIMITER /*!*/; ROLLBACK/*!*/; SET INSERT_ID=1/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1579609942/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -601,7 +601,7 @@ ROLLBACK /* added by mysqlbinlog */; /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; DELIMITER /*!*/; SET INSERT_ID=4/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1579609946/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -627,7 +627,7 @@ ROLLBACK /* added by mysqlbinlog */; /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; DELIMITER /*!*/; ROLLBACK/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1579609942/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -661,7 +661,7 @@ ROLLBACK /* added by mysqlbinlog */; /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; DELIMITER /*!*/; SET INSERT_ID=4/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1579609946/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -684,7 +684,7 @@ ROLLBACK /* added by mysqlbinlog */; DELIMITER /*!*/; ROLLBACK/*!*/; SET INSERT_ID=3/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1579609944/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -714,7 +714,7 @@ ROLLBACK /* added by mysqlbinlog */; /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; DELIMITER /*!*/; ROLLBACK/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1579609942/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -744,7 +744,7 @@ ROLLBACK /* added by mysqlbinlog */; /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; DELIMITER /*!*/; ROLLBACK/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1579609942/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -779,7 +779,7 @@ insert into t1 values(null, "e") DELIMITER ; DELIMITER /*!*/; SET INSERT_ID=6/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1579609943/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -802,7 +802,7 @@ ROLLBACK /* added by mysqlbinlog */; DELIMITER /*!*/; ROLLBACK/*!*/; SET INSERT_ID=1/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1579609942/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -833,7 +833,7 @@ insert into t1 values(null, "e") DELIMITER ; DELIMITER /*!*/; SET INSERT_ID=6/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1579609943/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -855,7 +855,7 @@ ROLLBACK /* added by mysqlbinlog */; /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; DELIMITER /*!*/; SET INSERT_ID=4/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1579609946/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -874,7 +874,7 @@ insert into t1 values(null, "e") DELIMITER ; DELIMITER /*!*/; SET INSERT_ID=6/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1579609943/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -896,7 +896,7 @@ ROLLBACK /* added by mysqlbinlog */; /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; DELIMITER /*!*/; ROLLBACK/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1579609942/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -942,7 +942,7 @@ ROLLBACK /* added by mysqlbinlog */; DELIMITER /*!*/; ROLLBACK/*!*/; SET INSERT_ID=3/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1579609944/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -965,7 +965,7 @@ insert into t1 values(null, "e") DELIMITER ; DELIMITER /*!*/; SET INSERT_ID=6/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1579609943/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -987,7 +987,7 @@ ROLLBACK /* added by mysqlbinlog */; /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; DELIMITER /*!*/; ROLLBACK/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1579609942/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -1017,7 +1017,7 @@ ROLLBACK /* added by mysqlbinlog */; /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; DELIMITER /*!*/; ROLLBACK/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1579609942/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; diff --git a/mysql-test/r/mysqlbinlog_row.result b/mysql-test/r/mysqlbinlog_row.result index 9b562ac0fff..862aa4048fa 100644 --- a/mysql-test/r/mysqlbinlog_row.result +++ b/mysql-test/r/mysqlbinlog_row.result @@ -336,7 +336,7 @@ DELIMITER /*!*/; ROLLBACK/*!*/; # at # #010909 4:46:40 server id 1 end_log_pos # Query thread_id=# exec_time=# error_code=0 -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1000000000/*!*/; SET @@session.pseudo_thread_id=#/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; diff --git a/mysql-test/r/mysqlbinlog_row_innodb.result b/mysql-test/r/mysqlbinlog_row_innodb.result index ee448311278..d670acfdf75 100644 --- a/mysql-test/r/mysqlbinlog_row_innodb.result +++ b/mysql-test/r/mysqlbinlog_row_innodb.result @@ -2253,7 +2253,7 @@ DELIMITER /*!*/; ROLLBACK/*!*/; # at # #010909 4:46:40 server id 1 end_log_pos # Query thread_id=# exec_time=# error_code=0 -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1000000000/*!*/; SET @@session.pseudo_thread_id=#/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -3876,7 +3876,7 @@ DELIMITER /*!*/; ROLLBACK/*!*/; # at # #010909 4:46:40 server id 1 end_log_pos # Query thread_id=# exec_time=# error_code=0 -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1000000000/*!*/; SET @@session.pseudo_thread_id=#/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -4243,7 +4243,7 @@ DELIMITER /*!*/; ROLLBACK/*!*/; # at # #010909 4:46:40 server id 1 end_log_pos # Query thread_id=# exec_time=# error_code=0 -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1000000000/*!*/; SET @@session.pseudo_thread_id=#/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -4804,7 +4804,7 @@ DELIMITER /*!*/; ROLLBACK/*!*/; # at # #010909 4:46:40 server id 1 end_log_pos # Query thread_id=# exec_time=# error_code=0 -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1000000000/*!*/; SET @@session.pseudo_thread_id=#/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; diff --git a/mysql-test/r/mysqlbinlog_row_myisam.result b/mysql-test/r/mysqlbinlog_row_myisam.result index b9366d941f8..8e809463042 100644 --- a/mysql-test/r/mysqlbinlog_row_myisam.result +++ b/mysql-test/r/mysqlbinlog_row_myisam.result @@ -2253,7 +2253,7 @@ DELIMITER /*!*/; ROLLBACK/*!*/; # at # #010909 4:46:40 server id 1 end_log_pos # Query thread_id=# exec_time=# error_code=0 -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1000000000/*!*/; SET @@session.pseudo_thread_id=#/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -3898,7 +3898,7 @@ DELIMITER /*!*/; ROLLBACK/*!*/; # at # #010909 4:46:40 server id 1 end_log_pos # Query thread_id=# exec_time=# error_code=0 -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1000000000/*!*/; SET @@session.pseudo_thread_id=#/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -4271,7 +4271,7 @@ DELIMITER /*!*/; ROLLBACK/*!*/; # at # #010909 4:46:40 server id 1 end_log_pos # Query thread_id=# exec_time=# error_code=0 -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1000000000/*!*/; SET @@session.pseudo_thread_id=#/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -4842,7 +4842,7 @@ DELIMITER /*!*/; ROLLBACK/*!*/; # at # #010909 4:46:40 server id 1 end_log_pos # Query thread_id=# exec_time=# error_code=0 -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1000000000/*!*/; SET @@session.pseudo_thread_id=#/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; diff --git a/mysql-test/r/mysqlbinlog_row_trans.result b/mysql-test/r/mysqlbinlog_row_trans.result index 9c3348a9e76..d76a7884d92 100644 --- a/mysql-test/r/mysqlbinlog_row_trans.result +++ b/mysql-test/r/mysqlbinlog_row_trans.result @@ -132,7 +132,7 @@ DELIMITER /*!*/; ROLLBACK/*!*/; # at # #010909 4:46:40 server id 1 end_log_pos # Query thread_id=# exec_time=# error_code=0 -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1000000000/*!*/; SET @@session.pseudo_thread_id=#/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; diff --git a/mysql-test/r/user_var-binlog.result b/mysql-test/r/user_var-binlog.result index 05efea79fe7..c1effffde53 100644 --- a/mysql-test/r/user_var-binlog.result +++ b/mysql-test/r/user_var-binlog.result @@ -19,7 +19,7 @@ flush logs; DELIMITER /*!*/; ROLLBACK/*!*/; SET @`a b`:=_latin1 0x68656C6C6F COLLATE `latin1_swedish_ci`/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=10000/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; diff --git a/mysql-test/r/variables.result b/mysql-test/r/variables.result index b62fc7e0a8c..c0c8329e3a7 100644 --- a/mysql-test/r/variables.result +++ b/mysql-test/r/variables.result @@ -76,7 +76,7 @@ explain extended select @t1:=(@t2:=1)+@t3:=4,@t1,@t2,@t3; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used Warnings: -Note 1003 select (@t1:=((@t2:=1) + (@t3:=4))) AS `@t1:=(@t2:=1)+@t3:=4`,(@t1) AS `@t1`,(@t2) AS `@t2`,(@t3) AS `@t3` +Note 1003 select (@t1:=((@t2:=1) + (@t3:=4))) AS `@t1:=(@t2:=1)+@t3:=4`,(@`t1`) AS `@t1`,(@`t2`) AS `@t2`,(@`t3`) AS `@t3` select @t5; @t5 1.23456 diff --git a/mysql-test/suite/binlog/r/binlog_base64_flag.result b/mysql-test/suite/binlog/r/binlog_base64_flag.result index a4c610c845a..deaeaf47679 100644 --- a/mysql-test/suite/binlog/r/binlog_base64_flag.result +++ b/mysql-test/suite/binlog/r/binlog_base64_flag.result @@ -35,7 +35,7 @@ DELIMITER /*!*/; # at 4 <#>ROLLBACK/*!*/; # at 102 -<#>use test/*!*/; +<#>use `test`/*!*/; SET TIMESTAMP=1196959712/*!*/; <#>SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; SET @@session.sql_mode=0/*!*/; diff --git a/mysql-test/suite/binlog/r/binlog_stm_ctype_ucs.result b/mysql-test/suite/binlog/r/binlog_stm_ctype_ucs.result index b7edf7fedb8..21974ba2913 100644 --- a/mysql-test/suite/binlog/r/binlog_stm_ctype_ucs.result +++ b/mysql-test/suite/binlog/r/binlog_stm_ctype_ucs.result @@ -13,7 +13,7 @@ flush logs; DELIMITER /*!*/; ROLLBACK/*!*/; SET @`v`:=_ucs2 0x006100620063 COLLATE `ucs2_general_ci`/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=10000/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; diff --git a/mysql-test/suite/binlog/r/binlog_stm_mix_innodb_myisam.result b/mysql-test/suite/binlog/r/binlog_stm_mix_innodb_myisam.result index d2f47e56c61..7f92744180c 100644 --- a/mysql-test/suite/binlog/r/binlog_stm_mix_innodb_myisam.result +++ b/mysql-test/suite/binlog/r/binlog_stm_mix_innodb_myisam.result @@ -631,7 +631,7 @@ master-bin.000001 # Query # # BEGIN master-bin.000001 # Intvar # # INSERT_ID=10 master-bin.000001 # Begin_load_query # # ;file_id=#;block_len=# master-bin.000001 # Intvar # # INSERT_ID=10 -master-bin.000001 # Execute_load_query # # use `test`; LOAD DATA INFILE '../../std_data/rpl_loaddata.dat' INTO TABLE `t4` FIELDS TERMINATED BY '\t' ENCLOSED BY '' ESCAPED BY '\\' LINES TERMINATED BY '\n' (`a`, @b) SET `b`=((@b) + `bug27417`(2)) ;file_id=# +master-bin.000001 # Execute_load_query # # use `test`; LOAD DATA INFILE '../../std_data/rpl_loaddata.dat' INTO TABLE `t4` FIELDS TERMINATED BY '\t' ENCLOSED BY '' ESCAPED BY '\\' LINES TERMINATED BY '\n' (`a`, @`b`) SET `b`=((@`b`) + `bug27417`(2)) ;file_id=# master-bin.000001 # Query # # ROLLBACK /* the output must denote there is the query */; drop trigger trg_del_t2; @@ -869,7 +869,7 @@ master-bin.000001 # User var # # @`b`=_latin1 0x3135 COLLATE latin1_swedish_ci master-bin.000001 # Begin_load_query # # ;file_id=#;block_len=# master-bin.000001 # Intvar # # INSERT_ID=10 master-bin.000001 # User var # # @`b`=_latin1 0x3135 COLLATE latin1_swedish_ci -master-bin.000001 # Execute_load_query # # use `test`; LOAD DATA INFILE '../../std_data/rpl_loaddata.dat' INTO TABLE `t4` FIELDS TERMINATED BY '\t' ENCLOSED BY '' ESCAPED BY '\\' LINES TERMINATED BY '\n' (`a`, @b) SET `b`=((@b) + `bug27417`(2)) ;file_id=# +master-bin.000001 # Execute_load_query # # use `test`; LOAD DATA INFILE '../../std_data/rpl_loaddata.dat' INTO TABLE `t4` FIELDS TERMINATED BY '\t' ENCLOSED BY '' ESCAPED BY '\\' LINES TERMINATED BY '\n' (`a`, @`b`) SET `b`=((@`b`) + `bug27417`(2)) ;file_id=# master-bin.000001 # Query # # ROLLBACK drop trigger trg_del_t2; drop table t1,t2,t3,t4,t5; diff --git a/mysql-test/suite/rpl/r/rpl_mdev382.result b/mysql-test/suite/rpl/r/rpl_mdev382.result new file mode 100644 index 00000000000..415ecdb13e6 --- /dev/null +++ b/mysql-test/suite/rpl/r/rpl_mdev382.result @@ -0,0 +1,275 @@ +include/master-slave.inc +[connection master] +create table t1 (a int primary key) engine=innodb; +create table t2 (a int primary key) engine=myisam; +begin; +insert into t1 values (1); +SET sql_mode = 'ANSI_QUOTES'; +savepoint `a``; create database couldbebadthingshere; savepoint ``dummy`; +insert into t1 values (2); +insert into t2 values (1); +SET sql_mode = ''; +rollback to savepoint `a``; create database couldbebadthingshere; savepoint ``dummy`; +Warnings: +Warning 1196 Some non-transactional changed tables couldn't be rolled back +insert into t1 values (3); +commit; +show binlog events from ; +Log_name Pos Event_type Server_id End_log_pos Info +master-bin.000001 # Query # # use `test`; create table t1 (a int primary key) engine=innodb +master-bin.000001 # Query # # use `test`; create table t2 (a int primary key) engine=myisam +master-bin.000001 # Query # # BEGIN +master-bin.000001 # Query # # use `test`; insert into t1 values (1) +master-bin.000001 # Query # # SAVEPOINT "a`; create database couldbebadthingshere; savepoint `dummy" +master-bin.000001 # Query # # use `test`; insert into t1 values (2) +master-bin.000001 # Query # # use `test`; insert into t2 values (1) +master-bin.000001 # Query # # ROLLBACK TO `a``; create database couldbebadthingshere; savepoint ``dummy` +master-bin.000001 # Query # # use `test`; insert into t1 values (3) +master-bin.000001 # Xid # # COMMIT /* XID */ +BEGIN; +insert into t1 values(10); +set sql_mode = 'ANSI_QUOTES'; +set sql_quote_show_create = 1; +savepoint a; +insert into t1 values(11); +savepoint "a""a"; +insert into t1 values(12); +set sql_quote_show_create = 0; +savepoint b; +insert into t1 values(13); +savepoint "b""b"; +insert into t1 values(14); +set sql_mode = ''; +set sql_quote_show_create = 1; +savepoint c; +insert into t1 values(15); +savepoint `c``c`; +insert into t1 values(16); +set sql_quote_show_create = 0; +savepoint d; +insert into t1 values(17); +savepoint `d``d`; +insert into t1 values(18); +COMMIT; +set sql_quote_show_create = 1; +show binlog events from ; +Log_name Pos Event_type Server_id End_log_pos Info +master-bin.000001 # Query # # BEGIN +master-bin.000001 # Query # # use `test`; insert into t1 values(10) +master-bin.000001 # Query # # SAVEPOINT "a" +master-bin.000001 # Query # # use `test`; insert into t1 values(11) +master-bin.000001 # Query # # SAVEPOINT "a""a" +master-bin.000001 # Query # # use `test`; insert into t1 values(12) +master-bin.000001 # Query # # SAVEPOINT b +master-bin.000001 # Query # # use `test`; insert into t1 values(13) +master-bin.000001 # Query # # SAVEPOINT "b""b" +master-bin.000001 # Query # # use `test`; insert into t1 values(14) +master-bin.000001 # Query # # SAVEPOINT `c` +master-bin.000001 # Query # # use `test`; insert into t1 values(15) +master-bin.000001 # Query # # SAVEPOINT `c``c` +master-bin.000001 # Query # # use `test`; insert into t1 values(16) +master-bin.000001 # Query # # SAVEPOINT d +master-bin.000001 # Query # # use `test`; insert into t1 values(17) +master-bin.000001 # Query # # SAVEPOINT `d``d` +master-bin.000001 # Query # # use `test`; insert into t1 values(18) +master-bin.000001 # Xid # # COMMIT /* XID */ +*** Test correct USE statement in SHOW BINLOG EVENTS *** +set sql_mode = 'ANSI_QUOTES'; +CREATE DATABASE "db1`; SELECT 'oops!'"; +use "db1`; SELECT 'oops!'"; +CREATE TABLE t1 (a INT PRIMARY KEY) engine=MyISAM; +INSERT INTO t1 VALUES (1); +set sql_mode = ''; +INSERT INTO t1 VALUES (2); +set sql_mode = 'ANSI_QUOTES'; +show binlog events from ; +Log_name Pos Event_type Server_id End_log_pos Info +master-bin.000001 # Query # # CREATE DATABASE "db1`; SELECT 'oops!'" +master-bin.000001 # Query # # use "db1`; SELECT 'oops!'"; CREATE TABLE t1 (a INT PRIMARY KEY) engine=MyISAM +master-bin.000001 # Query # # use "db1`; SELECT 'oops!'"; INSERT INTO t1 VALUES (1) +master-bin.000001 # Query # # use "db1`; SELECT 'oops!'"; INSERT INTO t1 VALUES (2) +set sql_mode = ''; +set sql_quote_show_create = 0; +show binlog events from ; +Log_name Pos Event_type Server_id End_log_pos Info +master-bin.000001 # Query # # CREATE DATABASE "db1`; SELECT 'oops!'" +master-bin.000001 # Query # # use `db1``; SELECT 'oops!'`; CREATE TABLE t1 (a INT PRIMARY KEY) engine=MyISAM +master-bin.000001 # Query # # use `db1``; SELECT 'oops!'`; INSERT INTO t1 VALUES (1) +master-bin.000001 # Query # # use `db1``; SELECT 'oops!'`; INSERT INTO t1 VALUES (2) +set sql_quote_show_create = 1; +show binlog events from ; +Log_name Pos Event_type Server_id End_log_pos Info +master-bin.000001 # Query # # CREATE DATABASE "db1`; SELECT 'oops!'" +master-bin.000001 # Query # # use `db1``; SELECT 'oops!'`; CREATE TABLE t1 (a INT PRIMARY KEY) engine=MyISAM +master-bin.000001 # Query # # use `db1``; SELECT 'oops!'`; INSERT INTO t1 VALUES (1) +master-bin.000001 # Query # # use `db1``; SELECT 'oops!'`; INSERT INTO t1 VALUES (2) +DROP TABLE t1; +use test; +***Test LOAD DATA INFILE with various identifiers that need correct quoting *** +use `db1``; SELECT 'oops!'`; +set timestamp=1000000000; +CREATE TABLE `t``1` (`a``1` VARCHAR(4) PRIMARY KEY, `b``2` VARCHAR(3), +`c``3` VARCHAR(7)); +LOAD DATA INFILE 'MYSQLTEST_VARDIR/tmp/f''le.txt' INTO TABLE `t``1` + FIELDS TERMINATED BY ',' ESCAPED BY '\\' ENCLOSED BY '''' + LINES TERMINATED BY '\n' + (`a``1`, @`b```) SET `b``2` = @`b```, `c``3` = concat('|', "b""a'z", "!"); +SELECT * FROM `t``1`; +a`1 b`2 c`3 +fo\o bar |b"a'z! +truncate `t``1`; +use test; +LOAD DATA INFILE 'MYSQLTEST_VARDIR/tmp/f''le.txt' + INTO TABLE `db1``; SELECT 'oops!'`.`t``1` + FIELDS TERMINATED BY ',' ESCAPED BY '\\' ENCLOSED BY '''' + LINES TERMINATED BY '\n' + (`a``1`, `b``2`) SET `c``3` = concat('|', "b""a'z", "!"); +SELECT * FROM `db1``; SELECT 'oops!'`.`t``1`; +a`1 b`2 c`3 +fo\o bar |b"a'z! +show binlog events from ; +Log_name Pos Event_type Server_id End_log_pos Info +master-bin.000001 # Query # # use `db1``; SELECT 'oops!'`; CREATE TABLE `t``1` (`a``1` VARCHAR(4) PRIMARY KEY, `b``2` VARCHAR(3), +`c``3` VARCHAR(7)) +master-bin.000001 # Begin_load_query # # ;file_id=#;block_len=# +master-bin.000001 # Execute_load_query # # use `db1``; SELECT 'oops!'`; LOAD DATA INFILE 'MYSQLTEST_VARDIR/tmp/f\'le.txt' INTO TABLE `t``1` FIELDS TERMINATED BY ',' ENCLOSED BY '\'' ESCAPED BY '\\' LINES TERMINATED BY '\n' (`a``1`, @`b```) SET `b``2`=(@`b```), `c``3`=concat('|','b"a\'z','!') ;file_id=# +master-bin.000001 # Query # # use `db1``; SELECT 'oops!'`; truncate `t``1` +master-bin.000001 # Begin_load_query # # ;file_id=#;block_len=# +master-bin.000001 # Execute_load_query # # use `test`; LOAD DATA INFILE 'MYSQLTEST_VARDIR/tmp/f\'le.txt' INTO TABLE `db1``; SELECT 'oops!'`.`t``1` FIELDS TERMINATED BY ',' ENCLOSED BY '\'' ESCAPED BY '\\' LINES TERMINATED BY '\n' (`a``1`, `b``2`) SET `c``3`=concat('|','b"a\'z','!') ;file_id=# +/*!40019 SET @@session.max_insert_delayed_threads=0*/; +/*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; +DELIMITER /*!*/; +ROLLBACK/*!*/; +use `db1``; SELECT 'oops!'`/*!*/; +SET TIMESTAMP=1000000000/*!*/; +SET @@session.pseudo_thread_id=999999999/*!*/; +SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; +SET @@session.sql_mode=0/*!*/; +SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/; +/*!\C latin1 *//*!*/; +SET @@session.character_set_client=8,@@session.collation_connection=8,@@session.collation_server=8/*!*/; +SET @@session.lc_time_names=0/*!*/; +SET @@session.collation_database=DEFAULT/*!*/; +CREATE TABLE `t``1` (`a``1` VARCHAR(4) PRIMARY KEY, `b``2` VARCHAR(3), +`c``3` VARCHAR(7)) +/*!*/; +SET TIMESTAMP=1000000000/*!*/; +LOAD DATA LOCAL INFILE '' INTO TABLE `t``1` FIELDS TERMINATED BY ',' ENCLOSED BY '\'' ESCAPED BY '\\' LINES TERMINATED BY '\n' (`a``1`, @`b```) SET `b``2`=(@`b```), `c``3`=concat('|','b"a\'z','!') +/*!*/; +SET TIMESTAMP=1000000000/*!*/; +truncate `t``1` +/*!*/; +use `test`/*!*/; +SET TIMESTAMP=1000000000/*!*/; +LOAD DATA LOCAL INFILE '' INTO TABLE `db1``; SELECT 'oops!'`.`t``1` FIELDS TERMINATED BY ',' ENCLOSED BY '\'' ESCAPED BY '\\' LINES TERMINATED BY '\n' (`a``1`, `b``2`) SET `c``3`=concat('|','b"a\'z','!') +/*!*/; +DELIMITER ; +# End of log file +ROLLBACK /* added by mysqlbinlog */; +/*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/; +SELECT * FROM `db1``; SELECT 'oops!'`.`t``1`; +a`1 b`2 c`3 +fo\o bar |b"a'z! +DROP TABLE `db1``; SELECT 'oops!'`.`t``1`; +drop table t1,t2; +*** Test truncation of long SET expression in LOAD DATA *** +CREATE TABLE t1 (a INT PRIMARY KEY, b VARCHAR(1000)); +LOAD DATA INFILE 'MYSQLTEST_VARDIR/tmp/file.txt' INTO TABLE t1 +FIELDS TERMINATED BY ',' + (a, @b) SET b = CONCAT(@b, '| 123456789A123456789B123456789C123456789D123456789E123456789F123456789G123456789H123456789I123456789J123456789K123456789L123456789M123456789N123456789O123456789P123456789Q123456789R123456789123456789T123456789U123456789V123456789W123456789X123456789Y123456789Z123456789|', @b); +SELECT * FROM t1 ORDER BY a; +a b +1 X| 123456789A123456789B123456789C123456789D123456789E123456789F123456789G123456789H123456789I123456789J123456789K123456789L123456789M123456789N123456789O123456789P123456789Q123456789R123456789123456789T123456789U123456789V123456789W123456789X123456789Y123456789Z123456789|X +2 A| 123456789A123456789B123456789C123456789D123456789E123456789F123456789G123456789H123456789I123456789J123456789K123456789L123456789M123456789N123456789O123456789P123456789Q123456789R123456789123456789T123456789U123456789V123456789W123456789X123456789Y123456789Z123456789|A +show binlog events from ; +Log_name Pos Event_type Server_id End_log_pos Info +master-bin.000001 # Begin_load_query # # ;file_id=#;block_len=# +master-bin.000001 # Execute_load_query # # use `test`; LOAD DATA INFILE 'MYSQLTEST_VARDIR/tmp/file.txt' INTO TABLE `t1` FIELDS TERMINATED BY ',' ENCLOSED BY '' ESCAPED BY '\\' LINES TERMINATED BY '\n' (`a`, @`b`) SET `b`=concat((@`b`),'| 123456789A123456789B123456789C123456789D123456789E123456789F123456789G123456789H123456789I123456789J123456789K123456789L123456789M123456789N123456789O123456789P123456789Q123456789R123456789123456789T123456789U123456789V123456789W123456789X123456789Y123456789Z123456789|',(@`b`)) ;file_id=# +SELECT * FROM t1 ORDER BY a; +a b +1 X| 123456789A123456789B123456789C123456789D123456789E123456789F123456789G123456789H123456789I123456789J123456789K123456789L123456789M123456789N123456789O123456789P123456789Q123456789R123456789123456789T123456789U123456789V123456789W123456789X123456789Y123456789Z123456789|X +2 A| 123456789A123456789B123456789C123456789D123456789E123456789F123456789G123456789H123456789I123456789J123456789K123456789L123456789M123456789N123456789O123456789P123456789Q123456789R123456789123456789T123456789U123456789V123456789W123456789X123456789Y123456789Z123456789|A +DROP TABLE t1; +*** Test user variables whose names require correct quoting *** +use `db1``; SELECT 'oops!'`; +CREATE TABLE t1 (a1 BIGINT PRIMARY KEY, a2 BIGINT, a3 BIGINT, a4 BIGINT UNSIGNED, b DOUBLE, c DECIMAL(65,10), d VARCHAR(100)); +INSERT INTO t1 VALUES (-9223372036854775808,42,9223372036854775807,18446744073709551615,-1234560123456789e110, -1234501234567890123456789012345678901234567890123456789.0123456789, REPEAT("x", 100)); +SELECT @`a``1`:=a1, @`a``2`:=a2, @`a``3`:=a3, @`a``4`:=a4, @`b```:=b, @```c`:=c, @```d```:=d FROM t1; +@`a``1`:=a1 @`a``2`:=a2 @`a``3`:=a3 @`a``4`:=a4 @`b```:=b @```c`:=c @```d```:=d +-9223372036854775808 42 9223372036854775807 18446744073709551615 -1.23456012345679e+125 -1234501234567890123456789012345678901234567890123456789.0123456789 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx +INSERT INTO t1 VALUES (@`a``1`+1, @`a``2`*100, @`a``3`-1, @`a``4`-1, @`b```/2, @```c`, substr(@```d```, 2, 98)); +show binlog events from ; +Log_name Pos Event_type Server_id End_log_pos Info +master-bin.000001 # Query # # use `db1``; SELECT 'oops!'`; CREATE TABLE t1 (a1 BIGINT PRIMARY KEY, a2 BIGINT, a3 BIGINT, a4 BIGINT UNSIGNED, b DOUBLE, c DECIMAL(65,10), d VARCHAR(100)) +master-bin.000001 # Query # # use `db1``; SELECT 'oops!'`; INSERT INTO t1 VALUES (-9223372036854775808,42,9223372036854775807,18446744073709551615,-1234560123456789e110, -1234501234567890123456789012345678901234567890123456789.0123456789, REPEAT("x", 100)) +master-bin.000001 # User var # # @`a``1`=-9223372036854775808 +master-bin.000001 # User var # # @`a``2`=42 +master-bin.000001 # User var # # @`a``3`=9223372036854775807 +master-bin.000001 # User var # # @`a``4`=-1 +master-bin.000001 # User var # # @`b```=-1.2345601234568e+125 +master-bin.000001 # User var # # @```c`=-1234501234567890123456789012345678901234567890123456789.0123456789 +master-bin.000001 # User var # # @```d```=_latin1 0x78787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878 COLLATE latin1_swedish_ci +master-bin.000001 # Query # # use `db1``; SELECT 'oops!'`; INSERT INTO t1 VALUES (@`a``1`+1, @`a``2`*100, @`a``3`-1, @`a``4`-1, @`b```/2, @```c`, substr(@```d```, 2, 98)) +/*!40019 SET @@session.max_insert_delayed_threads=0*/; +/*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; +DELIMITER /*!*/; +ROLLBACK/*!*/; +use `db1``; SELECT 'oops!'`/*!*/; +SET TIMESTAMP=1000000000/*!*/; +SET @@session.pseudo_thread_id=999999999/*!*/; +SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; +SET @@session.sql_mode=0/*!*/; +SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/; +/*!\C latin1 *//*!*/; +SET @@session.character_set_client=8,@@session.collation_connection=8,@@session.collation_server=8/*!*/; +SET @@session.lc_time_names=0/*!*/; +SET @@session.collation_database=DEFAULT/*!*/; +CREATE TABLE t1 (a1 BIGINT PRIMARY KEY, a2 BIGINT, a3 BIGINT, a4 BIGINT UNSIGNED, b DOUBLE, c DECIMAL(65,10), d VARCHAR(100)) +/*!*/; +SET TIMESTAMP=1000000000/*!*/; +INSERT INTO t1 VALUES (-9223372036854775808,42,9223372036854775807,18446744073709551615,-1234560123456789e110, -1234501234567890123456789012345678901234567890123456789.0123456789, REPEAT("x", 100)) +/*!*/; +SET @`a``1`:=-9223372036854775808/*!*/; +SET @`a``2`:=42/*!*/; +SET @`a``3`:=9223372036854775807/*!*/; +SET @`a``4`:=-1/*!*/; +SET @`b```:=-1.2345601234568e+125/*!*/; +SET @```c`:=-1234501234567890123456789012345678901234567890123456789.0123456789/*!*/; +SET @```d```:=_latin1 0x78787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878 COLLATE `latin1_swedish_ci`/*!*/; +SET TIMESTAMP=1000000000/*!*/; +INSERT INTO t1 VALUES (@`a``1`+1, @`a``2`*100, @`a``3`-1, @`a``4`-1, @`b```/2, @```c`, substr(@```d```, 2, 98)) +/*!*/; +DELIMITER ; +# End of log file +ROLLBACK /* added by mysqlbinlog */; +/*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/; +SELECT * FROM `db1``; SELECT 'oops!'`.t1 ORDER BY a1; +a1 a2 a3 a4 b c d +-9223372036854775808 42 9223372036854775807 18446744073709551615 -1.23456012345679e+125 -1234501234567890123456789012345678901234567890123456789.0123456789 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx +-9223372036854775807 4200 9223372036854775806 0 -6.17280061728394e+124 -1234501234567890123456789012345678901234567890123456789.0123456789 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx +DROP TABLE t1; +*** Test correct quoting of DELETE FROM statement binlogged for HEAP table that is emptied due to server restart +include/stop_slave.inc +CREATE TABLE `db1``; SELECT 'oops!'`.`t``1` (`a``` INT PRIMARY KEY) ENGINE=heap; +INSERT INTO `db1``; SELECT 'oops!'`.`t``1` VALUES (1), (2), (5); +SELECT * FROM `db1``; SELECT 'oops!'`.`t``1` ORDER BY 1; +a` +1 +2 +5 +set timestamp=1000000000; +# The table should be empty on the master. +SELECT * FROM `db1``; SELECT 'oops!'`.`t``1`; +a` +# The DELETE statement should be correctly quoted +show binlog events in 'master-bin.000002' from ; +Log_name Pos Event_type Server_id End_log_pos Info +master-bin.000002 # Query # # use `test`; DELETE FROM `db1``; SELECT 'oops!'`.`t``1` +include/start_slave.inc +# The table should be empty on the slave also. +SELECT * FROM `db1``; SELECT 'oops!'`.`t``1`; +a` +DROP TABLE `db1``; SELECT 'oops!'`.`t``1`; +use test; +DROP DATABASE `db1``; SELECT 'oops!'`; +include/rpl_end.inc diff --git a/mysql-test/suite/rpl/r/rpl_row_mysqlbinlog.result b/mysql-test/suite/rpl/r/rpl_row_mysqlbinlog.result index 5fee82f6017..082ff16f157 100644 --- a/mysql-test/suite/rpl/r/rpl_row_mysqlbinlog.result +++ b/mysql-test/suite/rpl/r/rpl_row_mysqlbinlog.result @@ -153,7 +153,7 @@ Warning: The option '--position' is deprecated and will be removed in a future r /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; DELIMITER /*!*/; ROLLBACK/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1000000000/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -175,7 +175,7 @@ ROLLBACK /* added by mysqlbinlog */; /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; DELIMITER /*!*/; ROLLBACK/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1000000000/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -284,7 +284,7 @@ ROLLBACK /* added by mysqlbinlog */; /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; DELIMITER /*!*/; ROLLBACK/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1000000000/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -316,7 +316,7 @@ Warning: The option '--position' is deprecated and will be removed in a future r /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; DELIMITER /*!*/; ROLLBACK/*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=1000000000/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1, @@session.autocommit=1/*!*/; diff --git a/mysql-test/suite/rpl/r/rpl_sp.result b/mysql-test/suite/rpl/r/rpl_sp.result index fc9c05ebc81..8d0d6a8bf86 100644 --- a/mysql-test/suite/rpl/r/rpl_sp.result +++ b/mysql-test/suite/rpl/r/rpl_sp.result @@ -627,7 +627,7 @@ drop database if exists mysqltest1 SET TIMESTAMP=t/*!*/; create database mysqltest1 /*!*/; -use mysqltest1/*!*/; +use `mysqltest1`/*!*/; SET TIMESTAMP=t/*!*/; create table t1 (a varchar(100)) /*!*/; @@ -840,7 +840,7 @@ drop database mysqltest1 SET TIMESTAMP=t/*!*/; drop user "zedjzlcsjhd"@127.0.0.1 /*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=t/*!*/; drop function if exists f1 /*!*/; @@ -925,7 +925,7 @@ create database mysqltest SET TIMESTAMP=t/*!*/; create database mysqltest2 /*!*/; -use mysqltest2/*!*/; +use `mysqltest2`/*!*/; SET TIMESTAMP=t/*!*/; create table t ( t integer ) /*!*/; @@ -943,7 +943,7 @@ insert into t values (1); return 0; end /*!*/; -use mysqltest/*!*/; +use `mysqltest`/*!*/; SET TIMESTAMP=t/*!*/; SELECT `mysqltest2`.`f1`() /*!*/; @@ -953,14 +953,14 @@ drop database mysqltest SET TIMESTAMP=t/*!*/; drop database mysqltest2 /*!*/; -use test/*!*/; +use `test`/*!*/; SET TIMESTAMP=t/*!*/; CREATE DEFINER=`root`@`localhost` PROCEDURE `mysqltestbug36570_p1`() begin select 1; end /*!*/; -use mysql/*!*/; +use `mysql`/*!*/; SET TIMESTAMP=t/*!*/; CREATE DEFINER=`root`@`localhost` PROCEDURE `test`.` mysqltestbug36570_p2`( a int) `label`: diff --git a/mysql-test/suite/rpl/t/rpl_mdev382.test b/mysql-test/suite/rpl/t/rpl_mdev382.test new file mode 100644 index 00000000000..29190d1b37a --- /dev/null +++ b/mysql-test/suite/rpl/t/rpl_mdev382.test @@ -0,0 +1,249 @@ +--source include/have_innodb.inc +--source include/not_windows.inc +--source include/have_binlog_format_statement.inc +--source include/master-slave.inc + +# MDEV-382: multiple SQL injections in replication code. + +# Test previous SQL injection attack against binlog for SAVEPOINT statement. +# The test would cause syntax error on slave due to improper quoting of +# the savepoint name. +connection master; +create table t1 (a int primary key) engine=innodb; +create table t2 (a int primary key) engine=myisam; + +begin; +insert into t1 values (1); +SET sql_mode = 'ANSI_QUOTES'; +savepoint `a``; create database couldbebadthingshere; savepoint ``dummy`; +insert into t1 values (2); +insert into t2 values (1); +SET sql_mode = ''; +rollback to savepoint `a``; create database couldbebadthingshere; savepoint ``dummy`; +insert into t1 values (3); +commit; + +--source include/show_binlog_events.inc + +# This failed due to syntax error in query when the bug was not fixed. +sync_slave_with_master; +connection slave; + +# Test some more combinations of ANSI_QUOTES and sql_quote_show_create +connection master; +let $binlog_start= query_get_value(SHOW MASTER STATUS, Position, 1); +BEGIN; +insert into t1 values(10); +set sql_mode = 'ANSI_QUOTES'; +set sql_quote_show_create = 1; +savepoint a; +insert into t1 values(11); +savepoint "a""a"; +insert into t1 values(12); +set sql_quote_show_create = 0; +savepoint b; +insert into t1 values(13); +savepoint "b""b"; +insert into t1 values(14); +set sql_mode = ''; +set sql_quote_show_create = 1; +savepoint c; +insert into t1 values(15); +savepoint `c``c`; +insert into t1 values(16); +set sql_quote_show_create = 0; +savepoint d; +insert into t1 values(17); +savepoint `d``d`; +insert into t1 values(18); +COMMIT; +set sql_quote_show_create = 1; + +--source include/show_binlog_events.inc + +--echo *** Test correct USE statement in SHOW BINLOG EVENTS *** +connection master; +let $binlog_start= query_get_value(SHOW MASTER STATUS, Position, 1); +set sql_mode = 'ANSI_QUOTES'; +CREATE DATABASE "db1`; SELECT 'oops!'"; +use "db1`; SELECT 'oops!'"; +CREATE TABLE t1 (a INT PRIMARY KEY) engine=MyISAM; +INSERT INTO t1 VALUES (1); +set sql_mode = ''; +INSERT INTO t1 VALUES (2); +set sql_mode = 'ANSI_QUOTES'; +--source include/show_binlog_events.inc +set sql_mode = ''; +set sql_quote_show_create = 0; +--source include/show_binlog_events.inc +set sql_quote_show_create = 1; +--source include/show_binlog_events.inc +DROP TABLE t1; + +use test; + +--echo ***Test LOAD DATA INFILE with various identifiers that need correct quoting *** + +--let $load_file= $MYSQLTEST_VARDIR/tmp/f'le.txt +--write_file $load_file +'fo\\o','bar' +EOF +--exec chmod go+r "$load_file" + +use `db1``; SELECT 'oops!'`; +let $binlog_start= query_get_value(SHOW MASTER STATUS, Position, 1); +set timestamp=1000000000; +CREATE TABLE `t``1` (`a``1` VARCHAR(4) PRIMARY KEY, `b``2` VARCHAR(3), + `c``3` VARCHAR(7)); +--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR +eval LOAD DATA INFILE '$MYSQLTEST_VARDIR/tmp/f''le.txt' INTO TABLE `t``1` + FIELDS TERMINATED BY ',' ESCAPED BY '\\\\' ENCLOSED BY '''' + LINES TERMINATED BY '\\n' + (`a``1`, @`b```) SET `b``2` = @`b```, `c``3` = concat('|', "b""a'z", "!"); + +SELECT * FROM `t``1`; +# Also test when code prefixes table name with database. +truncate `t``1`; +use test; +--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR +eval LOAD DATA INFILE '$MYSQLTEST_VARDIR/tmp/f''le.txt' + INTO TABLE `db1``; SELECT 'oops!'`.`t``1` + FIELDS TERMINATED BY ',' ESCAPED BY '\\\\' ENCLOSED BY '''' + LINES TERMINATED BY '\\n' + (`a``1`, `b``2`) SET `c``3` = concat('|', "b""a'z", "!"); +SELECT * FROM `db1``; SELECT 'oops!'`.`t``1`; +let $pos2= query_get_value(SHOW MASTER STATUS, Position, 1); + +--source include/show_binlog_events.inc +let $MYSQLD_DATADIR= `select @@datadir`; +--replace_regex /LOCAL INFILE '.*SQL_LOAD.*' INTO/LOCAL INFILE '' INTO/ +--exec $MYSQL_BINLOG --short-form --start-position=$binlog_start --stop-position=$pos2 $MYSQLD_DATADIR/master-bin.000001 + +sync_slave_with_master; +connection slave; +SELECT * FROM `db1``; SELECT 'oops!'`.`t``1`; +connection master; + +DROP TABLE `db1``; SELECT 'oops!'`.`t``1`; +--remove_file $load_file + +connection master; +drop table t1,t2; + + +--echo *** Test truncation of long SET expression in LOAD DATA *** +CREATE TABLE t1 (a INT PRIMARY KEY, b VARCHAR(1000)); +--let $load_file= $MYSQLTEST_VARDIR/tmp/file.txt +--write_file $load_file +1,X +2,A +EOF +--exec chmod go+r "$load_file" + +let $binlog_start= query_get_value(SHOW MASTER STATUS, Position, 1); +# The bug was that the SET expression was truncated to 256 bytes, so test with +# an expression longer than that. +--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR +eval LOAD DATA INFILE '$load_file' INTO TABLE t1 + FIELDS TERMINATED BY ',' + (a, @b) SET b = CONCAT(@b, '| 123456789A123456789B123456789C123456789D123456789E123456789F123456789G123456789H123456789I123456789J123456789K123456789L123456789M123456789N123456789O123456789P123456789Q123456789R123456789123456789T123456789U123456789V123456789W123456789X123456789Y123456789Z123456789|', @b); + +SELECT * FROM t1 ORDER BY a; +--source include/show_binlog_events.inc + +sync_slave_with_master; +connection slave; +SELECT * FROM t1 ORDER BY a; + +connection master; +--remove_file $load_file +DROP TABLE t1; + + +--echo *** Test user variables whose names require correct quoting *** +use `db1``; SELECT 'oops!'`; +let $binlog_start= query_get_value(SHOW MASTER STATUS, Position, 1); +CREATE TABLE t1 (a1 BIGINT PRIMARY KEY, a2 BIGINT, a3 BIGINT, a4 BIGINT UNSIGNED, b DOUBLE, c DECIMAL(65,10), d VARCHAR(100)); +INSERT INTO t1 VALUES (-9223372036854775808,42,9223372036854775807,18446744073709551615,-1234560123456789e110, -1234501234567890123456789012345678901234567890123456789.0123456789, REPEAT("x", 100)); +SELECT @`a``1`:=a1, @`a``2`:=a2, @`a``3`:=a3, @`a``4`:=a4, @`b```:=b, @```c`:=c, @```d```:=d FROM t1; +INSERT INTO t1 VALUES (@`a``1`+1, @`a``2`*100, @`a``3`-1, @`a``4`-1, @`b```/2, @```c`, substr(@```d```, 2, 98)); +let $pos2= query_get_value(SHOW MASTER STATUS, Position, 1); + +--source include/show_binlog_events.inc + +--exec $MYSQL_BINLOG --short-form --start-position=$binlog_start --stop-position=$pos2 $MYSQLD_DATADIR/master-bin.000001 + +sync_slave_with_master; +connection slave; +SELECT * FROM `db1``; SELECT 'oops!'`.t1 ORDER BY a1; + +connection master; +DROP TABLE t1; + + +--echo *** Test correct quoting of DELETE FROM statement binlogged for HEAP table that is emptied due to server restart + +# Let's keep the slave stopped during master restart, to avoid any potential +# races between slave reconnect and master restart. +connection slave; +--source include/stop_slave.inc + +connection master; +CREATE TABLE `db1``; SELECT 'oops!'`.`t``1` (`a``` INT PRIMARY KEY) ENGINE=heap; +INSERT INTO `db1``; SELECT 'oops!'`.`t``1` VALUES (1), (2), (5); +SELECT * FROM `db1``; SELECT 'oops!'`.`t``1` ORDER BY 1; + +# Restart the master mysqld. +# This will cause an implicit truncation of the memory-based table, which will +# cause logging of an explicit DELETE FROM to binlog. +--write_file $MYSQLTEST_VARDIR/tmp/mysqld.1.expect +wait-rpl_mdev382.test +EOF + +--shutdown_server 30 + +--remove_file $MYSQLTEST_VARDIR/tmp/mysqld.1.expect +--write_file $MYSQLTEST_VARDIR/tmp/mysqld.1.expect +restart-rpl_mdev382.test +EOF + +connection default; +--enable_reconnect +--source include/wait_until_connected_again.inc +# rpl_end.inc needs to use the connection server_1 +connection server_1; +--enable_reconnect +--source include/wait_until_connected_again.inc +connection master; +--enable_reconnect +--source include/wait_until_connected_again.inc +set timestamp=1000000000; + +--echo # The table should be empty on the master. +let $binlog_file= master-bin.000002; +let $binlog_start= query_get_value(SHOW MASTER STATUS, Position, 1); +SELECT * FROM `db1``; SELECT 'oops!'`.`t``1`; + +--echo # The DELETE statement should be correctly quoted +--source include/show_binlog_events.inc + +connection slave; +--source include/start_slave.inc + +connection master; +sync_slave_with_master; +connection slave; +--echo # The table should be empty on the slave also. +SELECT * FROM `db1``; SELECT 'oops!'`.`t``1`; + +connection master; +DROP TABLE `db1``; SELECT 'oops!'`.`t``1`; +sync_slave_with_master; + + +connection master; +use test; +DROP DATABASE `db1``; SELECT 'oops!'`; + + +--source include/rpl_end.inc diff --git a/mysys/mf_iocache2.c b/mysys/mf_iocache2.c index 16358b0056e..4ab0785d427 100644 --- a/mysys/mf_iocache2.c +++ b/mysys/mf_iocache2.c @@ -284,6 +284,40 @@ my_off_t my_b_filelength(IO_CACHE *info) } +size_t +my_b_write_backtick_quote(IO_CACHE *info, const char *str, size_t len) +{ + const uchar *start; + const uchar *p= (const uchar *)str; + const uchar *end= p + len; + size_t count; + size_t total= 0; + + if (my_b_write(info, (uchar *)"`", 1)) + return (size_t)-1; + ++total; + for (;;) + { + start= p; + while (p < end && *p != '`') + ++p; + count= p - start; + if (count && my_b_write(info, start, count)) + return (size_t)-1; + total+= count; + if (p >= end) + break; + if (my_b_write(info, (uchar *)"``", 2)) + return (size_t)-1; + total+= 2; + ++p; + } + if (my_b_write(info, (uchar *)"`", 1)) + return (size_t)-1; + ++total; + return total; +} + /* Simple printf version. Supports '%s', '%d', '%u', "%ld" and "%lu" Used for logging in MySQL @@ -308,6 +342,7 @@ size_t my_b_vprintf(IO_CACHE *info, const char* fmt, va_list args) uint minimum_width_sign; uint precision; /* as yet unimplemented for anything but %b */ my_bool is_zero_padded; + my_bool backtick_quoting; /* Store the location of the beginning of a format directive, for the @@ -342,6 +377,7 @@ size_t my_b_vprintf(IO_CACHE *info, const char* fmt, va_list args) fmt++; is_zero_padded= FALSE; + backtick_quoting= FALSE; minimum_width_sign= 1; minimum_width= 0; precision= 0; @@ -354,6 +390,8 @@ process_flags: minimum_width_sign= -1; fmt++; goto process_flags; case '0': is_zero_padded= TRUE; fmt++; goto process_flags; + case '`': + backtick_quoting= TRUE; fmt++; goto process_flags; case '#': /** @todo Implement "#" conversion flag. */ fmt++; goto process_flags; case ' ': @@ -397,9 +435,19 @@ process_flags: reg2 char *par = va_arg(args, char *); size_t length2 = strlen(par); /* TODO: implement precision */ - out_length+= length2; - if (my_b_write(info, (uchar*) par, length2)) - goto err; + if (backtick_quoting) + { + size_t total= my_b_write_backtick_quote(info, (uchar *) par, length2); + if (total == (size_t)-1) + goto err; + out_length+= total; + } + else + { + out_length+= length2; + if (my_b_write(info, (uchar*) par, length2)) + goto err; + } } else if (*fmt == 'b') /* Sized buffer parameter, only precision makes sense */ { diff --git a/sql/ha_ndbcluster_binlog.cc b/sql/ha_ndbcluster_binlog.cc index 31bede644d9..0de7cd03176 100644 --- a/sql/ha_ndbcluster_binlog.cc +++ b/sql/ha_ndbcluster_binlog.cc @@ -1268,7 +1268,9 @@ int ndbcluster_log_schema_op(THD *thd, NDB_SHARE *share, DBUG_RETURN(0); } - char tmp_buf2[FN_REFLEN]; + char tmp_buf2_mem[FN_REFLEN]; + String tmp_buf2(tmp_buf2_mem, sizeof(tmp_buf2_mem), system_charset_info); + tmp_buf2.length(0); const char *type_str; switch (type) { @@ -1277,17 +1279,24 @@ int ndbcluster_log_schema_op(THD *thd, NDB_SHARE *share, if (thd->lex->sql_command == SQLCOM_DROP_DB) DBUG_RETURN(0); /* redo the drop table query as is may contain several tables */ - query= tmp_buf2; - query_length= (uint) (strxmov(tmp_buf2, "drop table `", - table_name, "`", NullS) - tmp_buf2); + tmp_buf2.append(STRING_WITH_LEN("drop table ")); + append_identifier(thd, &tmp_buf2, table_name, strlen(table_name)); + query= tmp_buf2.c_ptr_safe(); + query_length= tmp_buf2.length(); type_str= "drop table"; break; case SOT_RENAME_TABLE: /* redo the rename table query as is may contain several tables */ - query= tmp_buf2; - query_length= (uint) (strxmov(tmp_buf2, "rename table `", - db, ".", table_name, "` to `", - new_db, ".", new_table_name, "`", NullS) - tmp_buf2); + tmp_buf2.append(STRING_WITH_LEN("rename table ")); + append_identifier(thd, &tmp_buf2, db, strlen(db)); + tmp_buf2.append(STRING_WITH_LEN(".")); + append_identifier(thd, &tmp_buf2, table_name, strlen(table_name)); + tmp_buf2.append(STRING_WITH_LEN(" to ")); + append_identifier(thd, &tmp_buf2, new_db, strlen(new_db)); + tmp_buf2.append(STRING_WITH_LEN(".")); + append_identifier(thd, &tmp_buf2, new_table_name, strlen(new_table_name)); + query= tmp_buf2.c_ptr_safe(); + query_length= tmp_buf2.length(); type_str= "rename table"; break; case SOT_CREATE_TABLE: diff --git a/sql/item.cc b/sql/item.cc index c2e208fe10f..023b273699c 100644 --- a/sql/item.cc +++ b/sql/item.cc @@ -749,15 +749,31 @@ void Item::set_name(const char *str, uint length, CHARSET_INFO *cs) if (!my_charset_same(cs, system_charset_info)) { size_t res_length; - name= sql_strmake_with_convert(str, name_length= length, cs, + name= sql_strmake_with_convert(str, length, cs, MAX_ALIAS_NAME, system_charset_info, &res_length); + name_length= res_length; } else name= sql_strmake(str, (name_length= min(length,MAX_ALIAS_NAME))); } +void Item::set_name_no_truncate(const char *str, uint length, CHARSET_INFO *cs) +{ + if (!my_charset_same(cs, system_charset_info)) + { + size_t res_length; + name= sql_strmake_with_convert(str, length, cs, + UINT_MAX, system_charset_info, + &res_length); + name_length= res_length; + } + else + name= sql_strmake(str, (name_length= length)); +} + + /** @details This function is called when: diff --git a/sql/item.h b/sql/item.h index 4201978201b..798abb5112a 100644 --- a/sql/item.h +++ b/sql/item.h @@ -554,6 +554,7 @@ public: #endif } /*lint -e1509 */ void set_name(const char *str, uint length, CHARSET_INFO *cs); + void set_name_no_truncate(const char *str, uint length, CHARSET_INFO *cs); void rename(char *new_name); void init_make_field(Send_field *tmp_field,enum enum_field_types type); virtual void cleanup(); diff --git a/sql/item_func.cc b/sql/item_func.cc index 2d1278e7ac3..2fe7e2ec15c 100644 --- a/sql/item_func.cc +++ b/sql/item_func.cc @@ -4743,7 +4743,7 @@ enum Item_result Item_func_get_user_var::result_type() const void Item_func_get_user_var::print(String *str, enum_query_type query_type) { str->append(STRING_WITH_LEN("(@")); - str->append(name.str,name.length); + append_identifier(current_thd, str, name.str, name.length); str->append(')'); } @@ -4841,10 +4841,10 @@ my_decimal* Item_user_var_as_out_param::val_decimal(my_decimal *decimal_buffer) } -void Item_user_var_as_out_param::print(String *str, enum_query_type query_type) +void Item_user_var_as_out_param::print_for_load(THD *thd, String *str) { str->append('@'); - str->append(name.str,name.length); + append_identifier(thd, str, name.str, name.length); } diff --git a/sql/item_func.h b/sql/item_func.h index ea9ed39159a..243ecb1ab39 100644 --- a/sql/item_func.h +++ b/sql/item_func.h @@ -1503,7 +1503,7 @@ public: my_decimal *val_decimal(my_decimal *decimal_buffer); /* fix_fields() binds variable name with its entry structure */ bool fix_fields(THD *thd, Item **ref); - virtual void print(String *str, enum_query_type query_type); + void print_for_load(THD *thd, String *str); void set_null_value(CHARSET_INFO* cs); void set_value(const char *str, uint length, CHARSET_INFO* cs); }; diff --git a/sql/log.cc b/sql/log.cc index c74e8bc9233..344ad76e11a 100644 --- a/sql/log.cc +++ b/sql/log.cc @@ -38,6 +38,7 @@ #endif #include +#include "sql_show.h" /* max size of the log message */ #define MAX_LOG_BUFFER_SIZE 1024 @@ -1726,9 +1727,8 @@ static int binlog_savepoint_set(handlerton *hton, THD *thd, void *sv) String log_query; if (log_query.append(STRING_WITH_LEN("SAVEPOINT ")) || - log_query.append("`") || - log_query.append(thd->lex->ident.str, thd->lex->ident.length) || - log_query.append("`")) + append_identifier(thd, &log_query, + thd->lex->ident.str, thd->lex->ident.length)) DBUG_RETURN(1); int errcode= query_error_code(thd, thd->killed == THD::NOT_KILLED); Query_log_event qinfo(thd, log_query.c_ptr_safe(), log_query.length(), @@ -1750,9 +1750,8 @@ static int binlog_savepoint_rollback(handlerton *hton, THD *thd, void *sv) { String log_query; if (log_query.append(STRING_WITH_LEN("ROLLBACK TO ")) || - log_query.append("`") || - log_query.append(thd->lex->ident.str, thd->lex->ident.length) || - log_query.append("`")) + append_identifier(thd, &log_query, + thd->lex->ident.str, thd->lex->ident.length)) DBUG_RETURN(1); int errcode= query_error_code(thd, thd->killed == THD::NOT_KILLED); Query_log_event qinfo(thd, log_query.c_ptr_safe(), log_query.length(), diff --git a/sql/log_event.cc b/sql/log_event.cc index 2ca1721a7ab..9c20a9478d2 100644 --- a/sql/log_event.cc +++ b/sql/log_event.cc @@ -34,6 +34,7 @@ #include "rpl_utility.h" #include "rpl_record.h" #include +#include "sql_show.h" #endif /* MYSQL_CLIENT */ @@ -413,29 +414,28 @@ inline bool unexpected_error_code(int unexpected_error) pretty_print_str() */ -static char *pretty_print_str(char *packet, const char *str, int len) +static void +pretty_print_str(String *packet, const char *str, int len) { const char *end= str + len; - char *pos= packet; - *pos++= '\''; + packet->append(STRING_WITH_LEN("'")); while (str < end) { char c; switch ((c=*str++)) { - case '\n': *pos++= '\\'; *pos++= 'n'; break; - case '\r': *pos++= '\\'; *pos++= 'r'; break; - case '\\': *pos++= '\\'; *pos++= '\\'; break; - case '\b': *pos++= '\\'; *pos++= 'b'; break; - case '\t': *pos++= '\\'; *pos++= 't'; break; - case '\'': *pos++= '\\'; *pos++= '\''; break; - case 0 : *pos++= '\\'; *pos++= '0'; break; + case '\n': packet->append(STRING_WITH_LEN("\\n")); break; + case '\r': packet->append(STRING_WITH_LEN("\\r")); break; + case '\\': packet->append(STRING_WITH_LEN("\\\\")); break; + case '\b': packet->append(STRING_WITH_LEN("\\b")); break; + case '\t': packet->append(STRING_WITH_LEN("\\t")); break; + case '\'': packet->append(STRING_WITH_LEN("\\'")); break; + case 0 : packet->append(STRING_WITH_LEN("\\0")); break; default: - *pos++= c; + packet->append(&c, 1); break; } } - *pos++= '\''; - return pos; + packet->append(STRING_WITH_LEN("'")); } #endif /* !MYSQL_CLIENT */ @@ -861,7 +861,7 @@ Log_event::do_shall_skip(Relay_log_info *rli) Log_event::pack_info() */ -void Log_event::pack_info(Protocol *protocol) +void Log_event::pack_info(THD *thd, Protocol *protocol) { protocol->store("", &my_charset_bin); } @@ -870,7 +870,8 @@ void Log_event::pack_info(Protocol *protocol) /** Only called by SHOW BINLOG EVENTS */ -int Log_event::net_send(Protocol *protocol, const char* log_name, my_off_t pos) +int Log_event::net_send(THD *thd, Protocol *protocol, const char* log_name, + my_off_t pos) { const char *p= strrchr(log_name, FN_LIBCHAR); const char *event_type; @@ -884,7 +885,7 @@ int Log_event::net_send(Protocol *protocol, const char* log_name, my_off_t pos) protocol->store(event_type, strlen(event_type), &my_charset_bin); protocol->store((uint32) server_id); protocol->store((ulonglong) log_pos); - pack_info(protocol); + pack_info(thd, protocol); return protocol->write(); } #endif /* HAVE_REPLICATION */ @@ -2139,27 +2140,22 @@ Log_event::continue_group(Relay_log_info *rli) show the catalog ?? */ -void Query_log_event::pack_info(Protocol *protocol) +void Query_log_event::pack_info(THD *thd, Protocol *protocol) { // TODO: show the catalog ?? - char *buf, *pos; - if (!(buf= (char*) my_malloc(9 + db_len + q_len, MYF(MY_WME)))) - return; - pos= buf; + char buf_mem[1024]; + String buf(buf_mem, sizeof(buf_mem), system_charset_info); + buf.real_alloc(9 + db_len + q_len); if (!(flags & LOG_EVENT_SUPPRESS_USE_F) && db && db_len) { - pos= strmov(buf, "use `"); - memcpy(pos, db, db_len); - pos= strmov(pos+db_len, "`; "); + buf.append(STRING_WITH_LEN("use ")); + append_identifier(thd, &buf, db, db_len); + buf.append("; "); } if (query && q_len) - { - memcpy(pos, query, q_len); - pos+= q_len; - } - protocol->store(buf, pos-buf, &my_charset_bin); - my_free(buf, MYF(MY_ALLOW_ZERO_PTR)); + buf.append(query, q_len); + protocol->store(&buf); } #endif @@ -2924,11 +2920,17 @@ void Query_log_event::print_query_header(IO_CACHE* file, } else if (db) { + /* Room for expand ` to `` + initial/final ` + \0 */ + char buf[FN_REFLEN*2+3]; + different_db= memcmp(print_event_info->db, db, db_len + 1); if (different_db) memcpy(print_event_info->db, db, db_len + 1); if (db[0] && different_db) - my_b_printf(file, "use %s%s\n", db, print_event_info->delimiter); + { + my_snprintf(buf, sizeof(buf), "%`s", db); + my_b_printf(file, "use %s%s\n", buf, print_event_info->delimiter); + } } end=int10_to_str((long) when, strmov(buff,"SET TIMESTAMP="),10); @@ -3545,7 +3547,7 @@ Start_log_event_v3::Start_log_event_v3() */ #if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) -void Start_log_event_v3::pack_info(Protocol *protocol) +void Start_log_event_v3::pack_info(THD *thd, Protocol *protocol) { char buf[12 + ST_SERVER_VER_LEN + 14 + 22], *pos; pos= strmov(buf, "Server ver: "); @@ -4194,131 +4196,115 @@ void Format_description_log_event::calc_server_version_split() */ #if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) -uint Load_log_event::get_query_buffer_length() +void Load_log_event::print_query(THD *thd, bool need_db, const char *cs, + String *buf, my_off_t *fn_start, + my_off_t *fn_end, const char *qualify_db) { - return - 5 + db_len + 3 + // "use DB; " - 18 + fname_len + 2 + // "LOAD DATA INFILE 'file''" - 11 + // "CONCURRENT " - 7 + // LOCAL - 9 + // " REPLACE or IGNORE " - 13 + table_name_len*2 + // "INTO TABLE `table`" - 21 + sql_ex.field_term_len*4 + 2 + // " FIELDS TERMINATED BY 'str'" - 23 + sql_ex.enclosed_len*4 + 2 + // " OPTIONALLY ENCLOSED BY 'str'" - 12 + sql_ex.escaped_len*4 + 2 + // " ESCAPED BY 'str'" - 21 + sql_ex.line_term_len*4 + 2 + // " LINES TERMINATED BY 'str'" - 19 + sql_ex.line_start_len*4 + 2 + // " LINES STARTING BY 'str'" - 15 + 22 + // " IGNORE xxx LINES" - 3 + (num_fields-1)*2 + field_block_len; // " (field1, field2, ...)" -} - - -void Load_log_event::print_query(bool need_db, const char *cs, char *buf, - char **end, char **fn_start, char **fn_end) -{ - char *pos= buf; - if (need_db && db && db_len) { - pos= strmov(pos, "use `"); - memcpy(pos, db, db_len); - pos= strmov(pos+db_len, "`; "); + buf->append(STRING_WITH_LEN("use ")); + append_identifier(thd, buf, db, db_len); + buf->append(STRING_WITH_LEN("; ")); } - pos= strmov(pos, "LOAD DATA "); + buf->append(STRING_WITH_LEN("LOAD DATA ")); if (thd->lex->lock_option == TL_WRITE_CONCURRENT_INSERT) - pos= strmov(pos, "CONCURRENT "); + buf->append(STRING_WITH_LEN("CONCURRENT ")); if (fn_start) - *fn_start= pos; + *fn_start= buf->length(); if (check_fname_outside_temp_buf()) - pos= strmov(pos, "LOCAL "); - pos= strmov(pos, "INFILE '"); - memcpy(pos, fname, fname_len); - pos= strmov(pos+fname_len, "' "); + buf->append(STRING_WITH_LEN("LOCAL ")); + buf->append(STRING_WITH_LEN("INFILE '")); + buf->append_for_single_quote(fname, fname_len); + buf->append(STRING_WITH_LEN("' ")); if (sql_ex.opt_flags & REPLACE_FLAG) - pos= strmov(pos, "REPLACE "); + buf->append(STRING_WITH_LEN("REPLACE ")); else if (sql_ex.opt_flags & IGNORE_FLAG) - pos= strmov(pos, "IGNORE "); + buf->append(STRING_WITH_LEN("IGNORE ")); - pos= strmov(pos ,"INTO"); + buf->append(STRING_WITH_LEN("INTO")); if (fn_end) - *fn_end= pos; + *fn_end= buf->length(); - pos= strmov(pos ," TABLE `"); - memcpy(pos, table_name, table_name_len); - pos+= table_name_len; + buf->append(STRING_WITH_LEN(" TABLE ")); + if (qualify_db) + { + append_identifier(thd, buf, qualify_db, strlen(qualify_db)); + buf->append(STRING_WITH_LEN(".")); + } + append_identifier(thd, buf, table_name, table_name_len); if (cs != NULL) { - pos= strmov(pos ,"` CHARACTER SET "); - pos= strmov(pos , cs); + buf->append(STRING_WITH_LEN(" CHARACTER SET ")); + buf->append(cs, strlen(cs)); } - else - pos= strmov(pos, "`"); /* We have to create all optional fields as the default is not empty */ - pos= strmov(pos, " FIELDS TERMINATED BY "); - pos= pretty_print_str(pos, sql_ex.field_term, sql_ex.field_term_len); + buf->append(STRING_WITH_LEN(" FIELDS TERMINATED BY ")); + pretty_print_str(buf, sql_ex.field_term, sql_ex.field_term_len); if (sql_ex.opt_flags & OPT_ENCLOSED_FLAG) - pos= strmov(pos, " OPTIONALLY "); - pos= strmov(pos, " ENCLOSED BY "); - pos= pretty_print_str(pos, sql_ex.enclosed, sql_ex.enclosed_len); + buf->append(STRING_WITH_LEN(" OPTIONALLY ")); + buf->append(STRING_WITH_LEN(" ENCLOSED BY ")); + pretty_print_str(buf, sql_ex.enclosed, sql_ex.enclosed_len); - pos= strmov(pos, " ESCAPED BY "); - pos= pretty_print_str(pos, sql_ex.escaped, sql_ex.escaped_len); + buf->append(STRING_WITH_LEN(" ESCAPED BY ")); + pretty_print_str(buf, sql_ex.escaped, sql_ex.escaped_len); - pos= strmov(pos, " LINES TERMINATED BY "); - pos= pretty_print_str(pos, sql_ex.line_term, sql_ex.line_term_len); + buf->append(STRING_WITH_LEN(" LINES TERMINATED BY ")); + pretty_print_str(buf, sql_ex.line_term, sql_ex.line_term_len); if (sql_ex.line_start_len) { - pos= strmov(pos, " STARTING BY "); - pos= pretty_print_str(pos, sql_ex.line_start, sql_ex.line_start_len); + buf->append(STRING_WITH_LEN(" STARTING BY ")); + pretty_print_str(buf, sql_ex.line_start, sql_ex.line_start_len); } if ((long) skip_lines > 0) { - pos= strmov(pos, " IGNORE "); - pos= longlong10_to_str((longlong) skip_lines, pos, 10); - pos= strmov(pos," LINES "); + char skipbuf[22]; + buf->append(STRING_WITH_LEN(" IGNORE ")); + longlong10_to_str((longlong) skip_lines, skipbuf, 10); + buf->append(skipbuf); + buf->append(STRING_WITH_LEN(" LINES ")); } if (num_fields) { uint i; const char *field= fields; - pos= strmov(pos, " ("); + buf->append(STRING_WITH_LEN(" (")); for (i = 0; i < num_fields; i++) { if (i) { - *pos++= ' '; - *pos++= ','; + /* + Yes, the space and comma is reversed here. But this is mostly dead + code, at most used when reading really old binlogs from old servers, + so better just leave it as is... + */ + buf->append(STRING_WITH_LEN(" ,")); } - memcpy(pos, field, field_lens[i]); - pos+= field_lens[i]; + append_identifier(thd, buf, field, field_lens[i]); field+= field_lens[i] + 1; } - *pos++= ')'; + buf->append(STRING_WITH_LEN(")")); } - - *end= pos; } -void Load_log_event::pack_info(Protocol *protocol) +void Load_log_event::pack_info(THD *thd, Protocol *protocol) { - char *buf, *end; + char query_buffer[1024]; + String query_str(query_buffer, sizeof(query_buffer), system_charset_info); - if (!(buf= (char*) my_malloc(get_query_buffer_length(), MYF(MY_WME)))) - return; - print_query(TRUE, NULL, buf, &end, 0, 0); - protocol->store(buf, end-buf, &my_charset_bin); - my_free(buf, MYF(0)); + query_str.length(0); + print_query(thd, TRUE, NULL, &query_str, 0, 0, NULL); + protocol->store(query_str.ptr(), query_str.length(), &my_charset_bin); } #endif /* defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) */ @@ -4585,7 +4571,7 @@ void Load_log_event::print(FILE* file_arg, PRINT_EVENT_INFO* print_event_info, else if (sql_ex.opt_flags & IGNORE_FLAG) my_b_printf(&cache,"IGNORE "); - my_b_printf(&cache, "INTO TABLE `%s`", table_name); + my_b_printf(&cache, "INTO TABLE %`s", table_name); my_b_printf(&cache, " FIELDS TERMINATED BY "); pretty_print_str(&cache, sql_ex.field_term, sql_ex.field_term_len); @@ -4774,16 +4760,20 @@ int Load_log_event::do_apply_event(NET* net, Relay_log_info const *rli, else { char llbuff[22]; - char *end; enum enum_duplicates handle_dup; bool ignore= 0; + char query_buffer[1024]; + String query_str(query_buffer, sizeof(query_buffer), system_charset_info); char *load_data_query; + query_str.length(0); /* Forge LOAD DATA INFILE query which will be used in SHOW PROCESS LIST and written to slave's binlog if binlogging is on. */ - if (!(load_data_query= (char *)thd->alloc(get_query_buffer_length() + 1))) + print_query(thd, FALSE, NULL, &query_str, NULL, NULL, NULL); + if (!(load_data_query= (char *)thd->strmake(query_str.ptr(), + query_str.length()))) { /* This will set thd->fatal_error in case of OOM. So we surely will notice @@ -4792,9 +4782,7 @@ int Load_log_event::do_apply_event(NET* net, Relay_log_info const *rli, goto error; } - print_query(FALSE, NULL, load_data_query, &end, NULL, NULL); - *end= 0; - thd->set_query(load_data_query, (uint) (end - load_data_query)); + thd->set_query(load_data_query, (uint) (query_str.length())); if (sql_ex.opt_flags & REPLACE_FLAG) { @@ -4959,7 +4947,7 @@ Error '%s' running LOAD DATA INFILE on table '%s'. Default database: '%s'", */ #if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) -void Rotate_log_event::pack_info(Protocol *protocol) +void Rotate_log_event::pack_info(THD *thd, Protocol *protocol) { char buf1[256], buf[22]; String tmp(buf1, sizeof(buf1), log_cs); @@ -5174,7 +5162,7 @@ Rotate_log_event::do_shall_skip(Relay_log_info *rli) */ #if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) -void Intvar_log_event::pack_info(Protocol *protocol) +void Intvar_log_event::pack_info(THD *thd, Protocol *protocol) { char buf[256], *pos; pos= strmake(buf, get_var_type_name(), sizeof(buf)-23); @@ -5323,7 +5311,7 @@ Intvar_log_event::do_shall_skip(Relay_log_info *rli) **************************************************************************/ #if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) -void Rand_log_event::pack_info(Protocol *protocol) +void Rand_log_event::pack_info(THD *thd, Protocol *protocol) { char buf1[256], *pos; pos= strmov(buf1,"rand_seed1="); @@ -5421,7 +5409,7 @@ Rand_log_event::do_shall_skip(Relay_log_info *rli) **************************************************************************/ #if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) -void Xid_log_event::pack_info(Protocol *protocol) +void Xid_log_event::pack_info(THD *thd, Protocol *protocol) { char buf[128], *pos; pos= strmov(buf, "COMMIT /* xid="); @@ -5508,69 +5496,109 @@ Xid_log_event::do_shall_skip(Relay_log_info *rli) **************************************************************************/ #if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) -void User_var_log_event::pack_info(Protocol* protocol) +static bool +user_var_append_name_part(THD *thd, String *buf, + const char *name, size_t name_len) { - char *buf= 0; - uint val_offset= 4 + name_len; - uint event_len= val_offset; + return buf->append("@") || + append_identifier(thd, buf, name, name_len) || + buf->append("="); +} +void User_var_log_event::pack_info(THD *thd, Protocol* protocol) +{ if (is_null) { - if (!(buf= (char*) my_malloc(val_offset + 5, MYF(MY_WME)))) + char buf_mem[FN_REFLEN+7]; + String buf(buf_mem, sizeof(buf_mem), system_charset_info); + buf.length(0); + if (user_var_append_name_part(thd, &buf, name, name_len) || + buf.append("NULL")) return; - strmov(buf + val_offset, "NULL"); - event_len= val_offset + 4; + protocol->store(buf.ptr(), buf.length(), &my_charset_bin); } else { switch (type) { case REAL_RESULT: + { double real_val; + char buf2[FLOATING_POINT_BUFFER]; + char buf_mem[FN_REFLEN + FLOATING_POINT_BUFFER]; + String buf(buf_mem, sizeof(buf_mem), system_charset_info); float8get(real_val, val); - if (!(buf= (char*) my_malloc(val_offset + FLOATING_POINT_BUFFER, - MYF(MY_WME)))) - return; - event_len+= my_sprintf(buf + val_offset, - (buf + val_offset, "%.14g", real_val)); + buf.length(0); + my_sprintf(buf2, (buf2, "%.14g", real_val)); + if (user_var_append_name_part(thd, &buf, name, name_len) || + buf.append(buf2)) + return; + protocol->store(buf.ptr(), buf.length(), &my_charset_bin); break; + } case INT_RESULT: - if (!(buf= (char*) my_malloc(val_offset + 22, MYF(MY_WME)))) + { + char buf2[22]; + char buf_mem[FN_REFLEN + 22]; + String buf(buf_mem, sizeof(buf_mem), system_charset_info); + buf.length(0); + if (user_var_append_name_part(thd, &buf, name, name_len) || + buf.append(buf2, longlong10_to_str(uint8korr(val), buf2, -10)-buf2)) return; - event_len= longlong10_to_str(uint8korr(val), buf + val_offset,-10)-buf; + protocol->store(buf.ptr(), buf.length(), &my_charset_bin); break; + } case DECIMAL_RESULT: { - if (!(buf= (char*) my_malloc(val_offset + DECIMAL_MAX_STR_LENGTH, - MYF(MY_WME)))) - return; - String str(buf+val_offset, DECIMAL_MAX_STR_LENGTH, &my_charset_bin); + char buf_mem[FN_REFLEN + DECIMAL_MAX_STR_LENGTH]; + String buf(buf_mem, sizeof(buf_mem), system_charset_info); + char buf2[DECIMAL_MAX_STR_LENGTH+1]; + String str(buf2, sizeof(buf2), &my_charset_bin); my_decimal dec; + buf.length(0); binary2my_decimal(E_DEC_FATAL_ERROR, (uchar*) (val+2), &dec, val[0], val[1]); my_decimal2string(E_DEC_FATAL_ERROR, &dec, 0, 0, 0, &str); - event_len= str.length() + val_offset; + if (user_var_append_name_part(thd, &buf, name, name_len) || + buf.append(buf2)) + return; + protocol->store(buf.ptr(), buf.length(), &my_charset_bin); break; } case STRING_RESULT: + { /* 15 is for 'COLLATE' and other chars */ - buf= (char*) my_malloc(event_len+val_len*2+1+2*MY_CS_NAME_SIZE+15, - MYF(MY_WME)); + char buf_mem[FN_REFLEN + 512 + 1 + 2*MY_CS_NAME_SIZE+15]; + String buf(buf_mem, sizeof(buf_mem), system_charset_info); CHARSET_INFO *cs; - if (!buf) - return; + buf.length(0); if (!(cs= get_charset(charset_number, MYF(0)))) { - strmov(buf+val_offset, "???"); - event_len+= 3; + if (buf.append("???")) + return; } else { - char *p= strxmov(buf + val_offset, "_", cs->csname, " ", NullS); - p= str_to_hex(p, val, val_len); - p= strxmov(p, " COLLATE ", cs->name, NullS); - event_len= p-buf; + size_t old_len; + char *beg, *end; + if (user_var_append_name_part(thd, &buf, name, name_len) || + buf.append("_") || + buf.append(cs->csname) || + buf.append(" ")) + return; + old_len= buf.length(); + if (buf.reserve(old_len + val_len*2 + 2 + sizeof(" COLLATE ") + + MY_CS_NAME_SIZE)) + return; + beg= const_cast(buf.ptr()) + old_len; + end= str_to_hex(beg, val, val_len); + buf.length(old_len + (end - beg)); + if (buf.append(" COLLATE ") || + buf.append(cs->name)) + return; } + protocol->store(buf.ptr(), buf.length(), &my_charset_bin); break; + } case ROW_RESULT: case IMPOSSIBLE_RESULT: default: @@ -5578,13 +5606,6 @@ void User_var_log_event::pack_info(Protocol* protocol) return; } } - buf[0]= '@'; - buf[1]= '`'; - memcpy(buf+2, name, name_len); - buf[2+name_len]= '`'; - buf[3+name_len]= '='; - protocol->store(buf, event_len, &my_charset_bin); - my_free(buf, MYF(0)); } #endif /* !MYSQL_CLIENT */ @@ -5700,9 +5721,8 @@ void User_var_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info) my_b_printf(&cache, "\tUser_var\n"); } - my_b_printf(&cache, "SET @`"); - my_b_write(&cache, (uchar*) name, (uint) (name_len)); - my_b_printf(&cache, "`"); + my_b_printf(&cache, "SET @"); + my_b_write_backtick_quote(&cache, name, name_len); if (is_null) { @@ -5775,7 +5795,7 @@ void User_var_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info) */ my_b_printf(&cache, ":=???%s\n", print_event_info->delimiter); else - my_b_printf(&cache, ":=_%s %s COLLATE `%s`%s\n", + my_b_printf(&cache, ":=_%s %s COLLATE %`s%s\n", cs->csname, hex_str, cs->name, print_event_info->delimiter); my_afree(hex_str); @@ -5914,7 +5934,7 @@ void Unknown_log_event::print(FILE* file_arg, PRINT_EVENT_INFO* print_event_info #endif #ifndef MYSQL_CLIENT -void Slave_log_event::pack_info(Protocol *protocol) +void Slave_log_event::pack_info(THD *thd, Protocol *protocol) { char buf[256+HOSTNAME_LENGTH], *pos; pos= strmov(buf, "host="); @@ -6286,7 +6306,7 @@ void Create_file_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info */ #if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) -void Create_file_log_event::pack_info(Protocol *protocol) +void Create_file_log_event::pack_info(THD *thd, Protocol *protocol) { char buf[SAFE_NAME_LEN*2 + 30 + 21*2], *pos; pos= strmov(buf, "db="); @@ -6467,7 +6487,7 @@ void Append_block_log_event::print(FILE* file, */ #if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) -void Append_block_log_event::pack_info(Protocol *protocol) +void Append_block_log_event::pack_info(THD *thd, Protocol *protocol) { char buf[256]; uint length; @@ -6619,7 +6639,7 @@ void Delete_file_log_event::print(FILE* file, */ #if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) -void Delete_file_log_event::pack_info(Protocol *protocol) +void Delete_file_log_event::pack_info(THD *thd, Protocol *protocol) { char buf[64]; uint length; @@ -6717,7 +6737,7 @@ void Execute_load_log_event::print(FILE* file, */ #if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) -void Execute_load_log_event::pack_info(Protocol *protocol) +void Execute_load_log_event::pack_info(THD *thd, Protocol *protocol) { char buf[64]; uint length; @@ -6970,27 +6990,26 @@ void Execute_load_query_log_event::print(FILE* file, #if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) -void Execute_load_query_log_event::pack_info(Protocol *protocol) +void Execute_load_query_log_event::pack_info(THD *thd, Protocol *protocol) { - char *buf, *pos; - if (!(buf= (char*) my_malloc(9 + db_len + q_len + 10 + 21, MYF(MY_WME)))) - return; - pos= buf; + char buf_mem[1024]; + char file_id_buf[22]; + String buf(buf_mem, sizeof(buf_mem), system_charset_info); + buf.real_alloc(9 + db_len + q_len + 10 + 21); if (db && db_len) { - pos= strmov(buf, "use `"); - memcpy(pos, db, db_len); - pos= strmov(pos+db_len, "`; "); + if (buf.append("use ") || + append_identifier(thd, &buf, db, db_len) || + buf.append("; ")) + return; } - if (query && q_len) - { - memcpy(pos, query, q_len); - pos+= q_len; - } - pos= strmov(pos, " ;file_id="); - pos= int10_to_str((long) file_id, pos, 10); - protocol->store(buf, pos-buf, &my_charset_bin); - my_free(buf, MYF(MY_ALLOW_ZERO_PTR)); + if (query && q_len && buf.append(query, q_len)) + return; + int10_to_str((long) file_id, file_id_buf, 10); + if (buf.append(" ;file_id=") || + buf.append(file_id_buf)) + return; + protocol->store(buf.ptr(), buf.length(), &my_charset_bin); } @@ -7932,7 +7951,7 @@ bool Rows_log_event::write_data_body(IO_CACHE*file) #endif #if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) -void Rows_log_event::pack_info(Protocol *protocol) +void Rows_log_event::pack_info(THD *thd, Protocol *protocol) { char buf[256]; char const *const flagstr= @@ -8533,7 +8552,7 @@ bool Table_map_log_event::write_data_body(IO_CACHE *file) */ #if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) -void Table_map_log_event::pack_info(Protocol *protocol) +void Table_map_log_event::pack_info(THD *thd, Protocol *protocol) { char buf[256]; size_t bytes= my_snprintf(buf, sizeof(buf), @@ -8554,7 +8573,7 @@ void Table_map_log_event::print(FILE *, PRINT_EVENT_INFO *print_event_info) { print_header(&print_event_info->head_cache, print_event_info, TRUE); my_b_printf(&print_event_info->head_cache, - "\tTable_map: `%s`.`%s` mapped to number %lu\n", + "\tTable_map: %`s.%`s mapped to number %lu\n", m_dbnam, m_tblnam, m_table_id); print_base64(&print_event_info->body_cache, print_event_info, TRUE); } @@ -9747,7 +9766,7 @@ Incident_log_event::description() const #ifndef MYSQL_CLIENT -void Incident_log_event::pack_info(Protocol *protocol) +void Incident_log_event::pack_info(THD *thd, Protocol *protocol) { char buf[256]; size_t bytes; diff --git a/sql/log_event.h b/sql/log_event.h index 645585c8ccb..9f13b04045d 100644 --- a/sql/log_event.h +++ b/sql/log_event.h @@ -947,14 +947,15 @@ public: */ static void init_show_field_list(List* field_list); #ifdef HAVE_REPLICATION - int net_send(Protocol *protocol, const char* log_name, my_off_t pos); + int net_send(THD *thd, Protocol *protocol, const char* log_name, + my_off_t pos); /* pack_info() is used by SHOW BINLOG EVENTS; as print() it prepares and sends a string to display to the user, so it resembles print(). */ - virtual void pack_info(Protocol *protocol); + virtual void pack_info(THD *thd, Protocol *protocol); #endif /* HAVE_REPLICATION */ virtual const char* get_db() @@ -1649,7 +1650,7 @@ public: bool using_trans, bool suppress_use, int error); const char* get_db() { return db; } #ifdef HAVE_REPLICATION - void pack_info(Protocol* protocol); + void pack_info(THD *thd, Protocol* protocol); #endif /* HAVE_REPLICATION */ #else void print_query_header(IO_CACHE* file, PRINT_EVENT_INFO* print_event_info); @@ -1779,7 +1780,7 @@ public: #ifndef MYSQL_CLIENT Slave_log_event(THD* thd_arg, Relay_log_info* rli); - void pack_info(Protocol* protocol); + void pack_info(THD *thd, Protocol* protocol); #else void print(FILE* file, PRINT_EVENT_INFO* print_event_info); #endif @@ -2012,9 +2013,11 @@ protected: const Format_description_log_event* description_event); public: - uint get_query_buffer_length(); - void print_query(bool need_db, const char *cs, char *buf, char **end, - char **fn_start, char **fn_end); +#ifndef MYSQL_CLIENT + void print_query(THD *thd, bool need_db, const char *cs, String *buf, + my_off_t *fn_start, my_off_t *fn_end, + const char *qualify_db); +#endif ulong thread_id; ulong slave_proxy_id; uint32 table_name_len; @@ -2062,7 +2065,7 @@ public: Name_resolution_context *context); const char* get_db() { return db; } #ifdef HAVE_REPLICATION - void pack_info(Protocol* protocol); + void pack_info(THD *thd, Protocol* protocol); #endif /* HAVE_REPLICATION */ #else void print(FILE* file, PRINT_EVENT_INFO* print_event_info); @@ -2161,7 +2164,7 @@ public: #ifndef MYSQL_CLIENT Start_log_event_v3(); #ifdef HAVE_REPLICATION - void pack_info(Protocol* protocol); + void pack_info(THD *thd, Protocol* protocol); #endif /* HAVE_REPLICATION */ #else Start_log_event_v3() {} @@ -2313,7 +2316,7 @@ public: :Log_event(thd_arg,0,0),val(val_arg),type(type_arg) {} #ifdef HAVE_REPLICATION - void pack_info(Protocol* protocol); + void pack_info(THD *thd, Protocol* protocol); #endif /* HAVE_REPLICATION */ #else void print(FILE* file, PRINT_EVENT_INFO* print_event_info); @@ -2389,7 +2392,7 @@ class Rand_log_event: public Log_event :Log_event(thd_arg,0,0),seed1(seed1_arg),seed2(seed2_arg) {} #ifdef HAVE_REPLICATION - void pack_info(Protocol* protocol); + void pack_info(THD *thd, Protocol* protocol); #endif /* HAVE_REPLICATION */ #else void print(FILE* file, PRINT_EVENT_INFO* print_event_info); @@ -2433,7 +2436,7 @@ class Xid_log_event: public Log_event #ifndef MYSQL_CLIENT Xid_log_event(THD* thd_arg, my_xid x): Log_event(thd_arg,0,0), xid(x) {} #ifdef HAVE_REPLICATION - void pack_info(Protocol* protocol); + void pack_info(THD *thd, Protocol* protocol); #endif /* HAVE_REPLICATION */ #else void print(FILE* file, PRINT_EVENT_INFO* print_event_info); @@ -2482,7 +2485,7 @@ public: :Log_event(), name(name_arg), name_len(name_len_arg), val(val_arg), val_len(val_len_arg), type(type_arg), charset_number(charset_number_arg) { is_null= !val; } - void pack_info(Protocol* protocol); + void pack_info(THD *thd, Protocol* protocol); #else void print(FILE* file, PRINT_EVENT_INFO* print_event_info); #endif @@ -2613,7 +2616,7 @@ public: uint ident_len_arg, ulonglong pos_arg, uint flags); #ifdef HAVE_REPLICATION - void pack_info(Protocol* protocol); + void pack_info(THD *thd, Protocol* protocol); #endif /* HAVE_REPLICATION */ #else void print(FILE* file, PRINT_EVENT_INFO* print_event_info); @@ -2673,7 +2676,7 @@ public: uchar* block_arg, uint block_len_arg, bool using_trans); #ifdef HAVE_REPLICATION - void pack_info(Protocol* protocol); + void pack_info(THD *thd, Protocol* protocol); #endif /* HAVE_REPLICATION */ #else void print(FILE* file, PRINT_EVENT_INFO* print_event_info); @@ -2745,7 +2748,7 @@ public: Append_block_log_event(THD* thd, const char* db_arg, uchar* block_arg, uint block_len_arg, bool using_trans); #ifdef HAVE_REPLICATION - void pack_info(Protocol* protocol); + void pack_info(THD *thd, Protocol* protocol); virtual int get_create_or_append() const; #endif /* HAVE_REPLICATION */ #else @@ -2786,7 +2789,7 @@ public: #ifndef MYSQL_CLIENT Delete_file_log_event(THD* thd, const char* db_arg, bool using_trans); #ifdef HAVE_REPLICATION - void pack_info(Protocol* protocol); + void pack_info(THD *thd, Protocol* protocol); #endif /* HAVE_REPLICATION */ #else void print(FILE* file, PRINT_EVENT_INFO* print_event_info); @@ -2827,7 +2830,7 @@ public: #ifndef MYSQL_CLIENT Execute_load_log_event(THD* thd, const char* db_arg, bool using_trans); #ifdef HAVE_REPLICATION - void pack_info(Protocol* protocol); + void pack_info(THD *thd, Protocol* protocol); #endif /* HAVE_REPLICATION */ #else void print(FILE* file, PRINT_EVENT_INFO* print_event_info); @@ -2923,7 +2926,7 @@ public: bool using_trans, bool suppress_use, int errcode); #ifdef HAVE_REPLICATION - void pack_info(Protocol* protocol); + void pack_info(THD *thd, Protocol* protocol); #endif /* HAVE_REPLICATION */ #else void print(FILE* file, PRINT_EVENT_INFO* print_event_info); @@ -3368,7 +3371,7 @@ public: #endif #if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION) - virtual void pack_info(Protocol *protocol); + virtual void pack_info(THD *thd, Protocol *protocol); #endif #ifdef MYSQL_CLIENT @@ -3480,7 +3483,7 @@ public: flag_set get_flags(flag_set flags_arg) const { return m_flags & flags_arg; } #if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION) - virtual void pack_info(Protocol *protocol); + virtual void pack_info(THD *thd, Protocol *protocol); #endif #ifdef MYSQL_CLIENT @@ -3917,7 +3920,7 @@ public: #endif #ifndef MYSQL_CLIENT - void pack_info(Protocol*); + void pack_info(THD *thd, Protocol*); #endif Incident_log_event(const char *buf, uint event_len, diff --git a/sql/log_event_old.cc b/sql/log_event_old.cc index cc9d712a834..e6705e3b486 100644 --- a/sql/log_event_old.cc +++ b/sql/log_event_old.cc @@ -2003,7 +2003,7 @@ bool Old_rows_log_event::write_data_body(IO_CACHE*file) #if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT) -void Old_rows_log_event::pack_info(Protocol *protocol) +void Old_rows_log_event::pack_info(THD *thd, Protocol *protocol) { char buf[256]; char const *const flagstr= diff --git a/sql/log_event_old.h b/sql/log_event_old.h index da5cf403fdb..2e551aa0cc0 100644 --- a/sql/log_event_old.h +++ b/sql/log_event_old.h @@ -108,7 +108,7 @@ public: flag_set get_flags(flag_set flags_arg) const { return m_flags & flags_arg; } #if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION) - virtual void pack_info(Protocol *protocol); + virtual void pack_info(THD *thd, Protocol *protocol); #endif #ifdef MYSQL_CLIENT diff --git a/sql/mysql_priv.h b/sql/mysql_priv.h index 60abf5a2361..a0532151479 100644 --- a/sql/mysql_priv.h +++ b/sql/mysql_priv.h @@ -1371,7 +1371,7 @@ bool append_escaped(String *to_str, String *from_str); /* sql_show.cc */ bool mysqld_show_open_tables(THD *thd,const char *wild); bool mysqld_show_logs(THD *thd); -void append_identifier(THD *thd, String *packet, const char *name, +bool append_identifier(THD *thd, String *packet, const char *name, uint length); #endif /* MYSQL_SERVER */ #if defined MYSQL_SERVER || defined INNODB_COMPATIBILITY_HOOKS diff --git a/sql/sql_base.cc b/sql/sql_base.cc index e895793f3c8..ed097f3cea0 100644 --- a/sql/sql_base.cc +++ b/sql/sql_base.cc @@ -4172,22 +4172,22 @@ retry: entry->file->implicit_emptied= 0; if (mysql_bin_log.is_open()) { - char *query, *end; - uint query_buf_size= 20 + share->db.length + share->table_name.length +1; - if ((query= (char*) my_malloc(query_buf_size,MYF(MY_WME)))) + char query_buf[2*FN_REFLEN + 21]; + String query(query_buf, sizeof(query_buf), system_charset_info); + query.length(0); + if (query.ptr()) { /* this DELETE FROM is needed even with row-based binlogging */ - end = strxmov(strmov(query, "DELETE FROM `"), - share->db.str,"`.`",share->table_name.str,"`", NullS); + query.append("DELETE FROM "); + append_identifier(thd, &query, share->db.str, share->db.length); + query.append("."); + append_identifier(thd, &query, share->table_name.str, + share->table_name.length); int errcode= query_error_code(thd, TRUE); if (thd->binlog_query(THD::STMT_QUERY_TYPE, - query, (ulong)(end-query), + query.ptr(), query.length(), FALSE, FALSE, errcode)) - { - my_free(query, MYF(0)); goto err; - } - my_free(query, MYF(0)); } else { @@ -4197,7 +4197,7 @@ retry: because of MYF(MY_WME) in my_malloc() above). */ sql_print_error("When opening HEAP table, could not allocate memory " - "to write 'DELETE FROM `%s`.`%s`' to the binary log", + "to write 'DELETE FROM %`s.%`s' to the binary log", table_list->db, table_list->table_name); delete entry->triggers; closefrm(entry, 0); diff --git a/sql/sql_db.cc b/sql/sql_db.cc index 460b41349b3..a407faf3c5e 100644 --- a/sql/sql_db.cc +++ b/sql/sql_db.cc @@ -612,7 +612,6 @@ int mysql_create_db(THD *thd, char *db, HA_CREATE_INFO *create_info, bool silent) { char path[FN_REFLEN+16]; - char tmp_query[FN_REFLEN+16]; long result= 1; int error= 0; MY_STAT stat_info; @@ -719,17 +718,9 @@ not_silent: char *query; uint query_length; - if (!thd->query()) // Only in replication - { - query= tmp_query; - query_length= (uint) (strxmov(tmp_query,"create database `", - db, "`", NullS) - tmp_query); - } - else - { - query= thd->query(); - query_length= thd->query_length(); - } + query= thd->query(); + query_length= thd->query_length(); + DBUG_ASSERT(query); ha_binlog_log_query(thd, 0, LOGCOM_CREATE_DB, query, query_length, @@ -989,18 +980,11 @@ bool mysql_rm_db(THD *thd,char *db,bool if_exists, bool silent) { const char *query; ulong query_length; - if (!thd->query()) - { - /* The client used the old obsolete mysql_drop_db() call */ - query= path; - query_length= (uint) (strxmov(path, "drop database `", db, "`", - NullS) - path); - } - else - { - query= thd->query(); - query_length= thd->query_length(); - } + + query= thd->query(); + query_length= thd->query_length(); + DBUG_ASSERT(query); + if (mysql_bin_log.is_open()) { thd->clear_error(); @@ -1041,9 +1025,10 @@ bool mysql_rm_db(THD *thd,char *db,bool if_exists, bool silent) for (tbl= dropped_tables; tbl; tbl= tbl->next_local) { uint tbl_name_len; + char quoted_name[FN_REFLEN+3]; - /* 3 for the quotes and the comma*/ - tbl_name_len= strlen(tbl->table_name) + 3; + my_snprintf(quoted_name, sizeof(quoted_name), "%`s", tbl->table_name); + tbl_name_len= strlen(quoted_name) + 1; /* +1 for the comma */ if (query_pos + tbl_name_len + 1 >= query_end) { /* These DDL methods and logging protected with LOCK_mysql_create_db */ @@ -1055,9 +1040,7 @@ bool mysql_rm_db(THD *thd,char *db,bool if_exists, bool silent) query_pos= query_data_start; } - *query_pos++ = '`'; - query_pos= strmov(query_pos,tbl->table_name); - *query_pos++ = '`'; + query_pos= strmov(query_pos, quoted_name); *query_pos++ = ','; } diff --git a/sql/sql_insert.cc b/sql/sql_insert.cc index 171e49aa7d6..b5b69add9b5 100644 --- a/sql/sql_insert.cc +++ b/sql/sql_insert.cc @@ -3457,16 +3457,16 @@ int select_create::write_to_binlog(bool is_trans, int errcode) if (thd->lex->create_select_in_comment) query.append(STRING_WITH_LEN("/*! ")); if (thd->lex->ignore) - query.append(STRING_WITH_LEN("INSERT IGNORE INTO `")); + query.append(STRING_WITH_LEN("INSERT IGNORE INTO ")); else if (thd->lex->duplicates == DUP_REPLACE) - query.append(STRING_WITH_LEN("REPLACE INTO `")); + query.append(STRING_WITH_LEN("REPLACE INTO ")); else - query.append(STRING_WITH_LEN("INSERT INTO `")); + query.append(STRING_WITH_LEN("INSERT INTO ")); - query.append(create_table->db, db_len); - query.append(STRING_WITH_LEN("`.`")); - query.append(create_info->alias, table_len); - query.append(STRING_WITH_LEN("` ")); + append_identifier(thd, &query, create_table->db, db_len); + query.append(STRING_WITH_LEN(".")); + append_identifier(thd, &query, create_info->alias, table_len); + query.append(STRING_WITH_LEN(" ")); /* The insert items. diff --git a/sql/sql_load.cc b/sql/sql_load.cc index 42e4489cb07..675f951ee07 100644 --- a/sql/sql_load.cc +++ b/sql/sql_load.cc @@ -24,6 +24,7 @@ #include "sql_repl.h" #include "sp_head.h" #include "sql_trigger.h" +#include "sql_show.h" class READ_INFO { File file; @@ -606,37 +607,19 @@ static bool write_execute_load_query_log_event(THD *thd, sql_exchange* ex, bool transactional_table, int errcode) { - char *load_data_query, - *end, - *fname_start, - *fname_end, - *p= NULL; - size_t pl= 0; + char *load_data_query; + my_off_t fname_start, + fname_end; List fv; Item *item, *val; - String pfield, pfields; int n; - const char *tbl= table_name_arg; const char *tdb= (thd->db != NULL ? thd->db : db_arg); - String string_buf; + const char *qualify_db= NULL; + char command_buffer[1024]; + String query_str(command_buffer, sizeof(command_buffer), + system_charset_info); - if (!thd->db || strcmp(db_arg, thd->db)) - { - /* - If used database differs from table's database, - prefix table name with database name so that it - becomes a FQ name. - */ - string_buf.set_charset(system_charset_info); - string_buf.append(db_arg); - string_buf.append("`"); - string_buf.append("."); - string_buf.append("`"); - string_buf.append(table_name_arg); - tbl= string_buf.c_ptr_safe(); - } - - Load_log_event lle(thd, ex, tdb, tbl, fv, duplicates, + Load_log_event lle(thd, ex, tdb, table_name_arg, fv, duplicates, ignore, transactional_table); /* @@ -645,6 +628,19 @@ static bool write_execute_load_query_log_event(THD *thd, sql_exchange* ex, if (thd->lex->local_file) lle.set_fname_outside_temp_buf(ex->file_name, strlen(ex->file_name)); + query_str.length(0); + if (!thd->db || strcmp(db_arg, thd->db)) + { + /* + If used database differs from table's database, + prefix table name with database name so that it + becomes a FQ name. + */ + qualify_db= db_arg; + } + lle.print_query(thd, FALSE, (const char *) ex->cs?ex->cs->csname:NULL, + &query_str, &fname_start, &fname_end, qualify_db); + /* prepare fields-list and SET if needed; print_query won't do that for us. */ @@ -652,23 +648,19 @@ static bool write_execute_load_query_log_event(THD *thd, sql_exchange* ex, { List_iterator li(thd->lex->field_list); - pfields.append(" ("); + query_str.append(" ("); n= 0; while ((item= li++)) { if (n++) - pfields.append(", "); + query_str.append(", "); if (item->name) - { - pfields.append("`"); - pfields.append(item->name); - pfields.append("`"); - } + append_identifier(thd, &query_str, item->name, strlen(item->name)); else - item->print(&pfields, QT_ORDINARY); + ((Item_user_var_as_out_param *)item)->print_for_load(thd, &query_str); } - pfields.append(")"); + query_str.append(")"); } if (!thd->lex->update_list.is_empty()) @@ -676,39 +668,26 @@ static bool write_execute_load_query_log_event(THD *thd, sql_exchange* ex, List_iterator lu(thd->lex->update_list); List_iterator lv(thd->lex->value_list); - pfields.append(" SET "); + query_str.append(" SET "); n= 0; while ((item= lu++)) { val= lv++; if (n++) - pfields.append(", "); - pfields.append("`"); - pfields.append(item->name); - pfields.append("`"); - pfields.append("="); - val->print(&pfields, QT_ORDINARY); + query_str.append(", "); + append_identifier(thd, &query_str, item->name, strlen(item->name)); + query_str.append("="); + val->print(&query_str, QT_ORDINARY); } } - p= pfields.c_ptr_safe(); - pl= strlen(p); - - if (!(load_data_query= (char *)thd->alloc(lle.get_query_buffer_length() + 1 + pl))) + if (!(load_data_query= (char *)thd->strmake(query_str.ptr(), query_str.length()))) return TRUE; - lle.print_query(FALSE, (const char *) ex->cs?ex->cs->csname:NULL, - load_data_query, &end, - (char **)&fname_start, (char **)&fname_end); - - strcpy(end, p); - end += pl; - Execute_load_query_log_event - e(thd, load_data_query, end-load_data_query, - (uint) ((char*) fname_start - load_data_query - 1), - (uint) ((char*) fname_end - load_data_query), + e(thd, load_data_query, query_str.length(), + (uint) (fname_start - 1), (uint) fname_end, (duplicates == DUP_REPLACE) ? LOAD_DUP_REPLACE : (ignore ? LOAD_DUP_IGNORE : LOAD_DUP_ERROR), transactional_table, FALSE, errcode); diff --git a/sql/sql_repl.cc b/sql/sql_repl.cc index 7a09074f554..f9f2b974cbc 100644 --- a/sql/sql_repl.cc +++ b/sql/sql_repl.cc @@ -1554,7 +1554,7 @@ bool mysql_show_binlog_events(THD* thd) description_event)); ) { if (event_count >= limit_start && - ev->net_send(protocol, linfo.log_file_name, pos)) + ev->net_send(thd, protocol, linfo.log_file_name, pos)) { errmsg = "Net error"; delete ev; diff --git a/sql/sql_show.cc b/sql/sql_show.cc index 02505962347..392413d2b81 100644 --- a/sql/sql_show.cc +++ b/sql/sql_show.cc @@ -1019,9 +1019,13 @@ static const char *require_quotes(const char *name, uint name_length) packet target string name the identifier to be appended name_length length of the appending identifier + + RETURN VALUES + true Error + false Ok */ -void +bool append_identifier(THD *thd, String *packet, const char *name, uint length) { const char *name_end; @@ -1029,10 +1033,7 @@ append_identifier(THD *thd, String *packet, const char *name, uint length) int q= get_quote_char_for_identifier(thd, name, length); if (q == EOF) - { - packet->append(name, length, packet->charset()); - return; - } + return packet->append(name, length, packet->charset()); /* The identifier must be quoted as it includes a quote character or @@ -1041,7 +1042,8 @@ append_identifier(THD *thd, String *packet, const char *name, uint length) VOID(packet->reserve(length*2 + 2)); quote_char= (char) q; - packet->append("e_char, 1, system_charset_info); + if (packet->append("e_char, 1, system_charset_info)) + return true; for (name_end= name+length ; name < name_end ; name+= length) { @@ -1056,11 +1058,13 @@ append_identifier(THD *thd, String *packet, const char *name, uint length) */ if (!length) length= 1; - if (length == 1 && chr == (uchar) quote_char) - packet->append("e_char, 1, system_charset_info); - packet->append(name, length, system_charset_info); + if (length == 1 && chr == (uchar) quote_char && + packet->append("e_char, 1, system_charset_info)) + return true; + if (packet->append(name, length, system_charset_info)) + return true; } - packet->append("e_char, 1, system_charset_info); + return packet->append("e_char, 1, system_charset_info); } diff --git a/sql/sql_string.cc b/sql/sql_string.cc index d56766f8994..6d81d6b16cb 100644 --- a/sql/sql_string.cc +++ b/sql/sql_string.cc @@ -1157,39 +1157,47 @@ outp: - -void String::print(String *str) +/* + Append characters to a single-quoted string '...', escaping special + characters as necessary. + Does not add the enclosing quotes, this is left up to caller. +*/ +void String::append_for_single_quote(const char *st, uint len) { - char *st= (char*)Ptr, *end= st+str_length; + const char *end= st+len; for (; st < end; st++) { uchar c= *st; switch (c) { case '\\': - str->append(STRING_WITH_LEN("\\\\")); + append(STRING_WITH_LEN("\\\\")); break; case '\0': - str->append(STRING_WITH_LEN("\\0")); + append(STRING_WITH_LEN("\\0")); break; case '\'': - str->append(STRING_WITH_LEN("\\'")); + append(STRING_WITH_LEN("\\'")); break; case '\n': - str->append(STRING_WITH_LEN("\\n")); + append(STRING_WITH_LEN("\\n")); break; case '\r': - str->append(STRING_WITH_LEN("\\r")); + append(STRING_WITH_LEN("\\r")); break; case '\032': // Ctrl-Z - str->append(STRING_WITH_LEN("\\Z")); + append(STRING_WITH_LEN("\\Z")); break; default: - str->append(c); + append(c); } } } +void String::print(String *str) +{ + str->append_for_single_quote(Ptr, str_length); +} /* Exchange state of this object and argument. diff --git a/sql/sql_string.h b/sql/sql_string.h index 44e7c1894bb..1614157cc64 100644 --- a/sql/sql_string.h +++ b/sql/sql_string.h @@ -385,6 +385,7 @@ public: return FALSE; } void print(String *print); + void append_for_single_quote(const char *st, uint len); /* Swap two string objects. Efficient way to exchange data without memcpy. */ void swap(String &s); diff --git a/sql/sql_table.cc b/sql/sql_table.cc index 9ee834bd0d0..541a7909f46 100644 --- a/sql/sql_table.cc +++ b/sql/sql_table.cc @@ -1945,6 +1945,7 @@ int mysql_rm_table_part2(THD *thd, TABLE_LIST *tables, bool if_exists, for (table= tables; table; table= table->next_local) { char *db=table->db; + size_t db_length= table->db_length; handlerton *table_type; enum legacy_db_type frm_db_type= DB_TYPE_UNKNOWN; @@ -1967,14 +1968,14 @@ int mysql_rm_table_part2(THD *thd, TABLE_LIST *tables, bool if_exists, built_tmp_query.append("DROP TEMPORARY TABLE IF EXISTS "); } - built_tmp_query.append("`"); if (thd->db == NULL || strcmp(db,thd->db) != 0) { - built_tmp_query.append(db); - built_tmp_query.append("`.`"); + append_identifier(thd, &built_tmp_query, db, db_length); + built_tmp_query.append("."); } - built_tmp_query.append(table->table_name); - built_tmp_query.append("`,"); + append_identifier(thd, &built_tmp_query, table->table_name, + table->table_name_length); + built_tmp_query.append(","); } continue; @@ -2000,15 +2001,15 @@ int mysql_rm_table_part2(THD *thd, TABLE_LIST *tables, bool if_exists, Don't write the database name if it is the current one (or if thd->db is NULL). */ - built_query.append("`"); if (thd->db == NULL || strcmp(db,thd->db) != 0) { - built_query.append(db); - built_query.append("`.`"); + append_identifier(thd, &built_query, db, db_length); + built_query.append("."); } - built_query.append(table->table_name); - built_query.append("`,"); + append_identifier(thd, &built_query, table->table_name, + table->table_name_length); + built_query.append(","); } if (!drop_temporary) diff --git a/strings/my_vsnprintf.c b/strings/my_vsnprintf.c index 508670dbad9..03da97ca82b 100644 --- a/strings/my_vsnprintf.c +++ b/strings/my_vsnprintf.c @@ -19,6 +19,57 @@ #include #include + +/** + Returns escaped string + + @param cs string charset + @param to buffer where escaped string will be placed + @param end end of buffer + @param par string to escape + @param par_len string length + @param quote_char character for quoting + + @retval + position in buffer which points on the end of escaped string +*/ + +static char *backtick_string(char *to, char *end, char *par, + size_t par_len, char quote_char) +{ + char *start= to; + char *par_end= par + par_len; + size_t buff_length= (size_t) (end - to); + + if (buff_length <= par_len) + goto err; + *start++= quote_char; + + for ( ; par < par_end; ++par) + { + char c= *par; + if (c == quote_char) + { + if (start + 1 >= end) + goto err; + *start++= quote_char; + } + if (start + 1 >= end) + goto err; + *start++= c; + } + + if (start + 1 >= end) + goto err; + *start++= quote_char; + return start; + +err: + *to='\0'; + return to; +} + + /* Limited snprintf() implementations @@ -45,7 +96,7 @@ size_t my_vsnprintf(char *to, size_t n, const char* fmt, va_list ap) { char *start=to, *end=to+n-1; size_t length, width; - uint pre_zero, have_long; + uint pre_zero, have_long, escaped_arg; for (; *fmt ; fmt++) { @@ -61,7 +112,7 @@ size_t my_vsnprintf(char *to, size_t n, const char* fmt, va_list ap) if (*fmt == '-') fmt++; length= width= 0; - pre_zero= have_long= 0; + pre_zero= have_long= escaped_arg= 0; if (*fmt == '*') { fmt++; @@ -93,6 +144,11 @@ size_t my_vsnprintf(char *to, size_t n, const char* fmt, va_list ap) fmt++; have_long= 1; } + if (*fmt == '`') + { + fmt++; + escaped_arg= 1; + } if (*fmt == 's') /* String parameter */ { reg2 char *par = va_arg(ap, char *); @@ -101,7 +157,10 @@ size_t my_vsnprintf(char *to, size_t n, const char* fmt, va_list ap) plen= (uint) strnlen(par, width); if (left_len <= plen) plen = left_len - 1; - to=strnmov(to,par,plen); + if (escaped_arg) + to= backtick_string(to, end, par, plen, '`'); + else + to= strnmov(to,par,plen); continue; } else if (*fmt == 'b') /* Buffer parameter */ @@ -185,6 +244,70 @@ size_t my_snprintf(char* to, size_t n, const char* fmt, ...) return result; } +/** + Writes output to the stream according to a format string. + + @param stream file to write to + @param format string format + @param args list of parameters + + @retval + number of the characters written. +*/ + +int my_vfprintf(FILE *stream, const char* format, va_list args) +{ + char cvtbuf[1024]; + int alloc= 0; + char *p= cvtbuf; + size_t cur_len= sizeof(cvtbuf); + int ret; + + /* + We do not know how much buffer we need. + So start with a reasonably-sized stack-allocated buffer, and increase + it exponentially until it is big enough. + */ + for (;;) + { + size_t new_len; + size_t actual= my_vsnprintf(p, cur_len, format, args); + if (actual < cur_len - 1) + break; + /* + Not enough space (or just enough with nothing to spare - but we cannot + distinguish this case from the return value). Allocate a bigger buffer + and try again. + */ + if (alloc) + (*my_str_free)(p); + else + alloc= 1; + new_len= cur_len*2; + if (new_len < cur_len) + return 0; /* Overflow */ + cur_len= new_len; + p= (*my_str_malloc)(cur_len); + if (!p) + return 0; + } + ret= fprintf(stream, "%s", p); + if (alloc) + (*my_str_free)(p); + return ret; +} + +int my_fprintf(FILE *stream, const char* format, ...) +{ + int result; + va_list args; + va_start(args, format); + result= my_vfprintf(stream, format, args); + va_end(args); + return result; +} + + #ifdef MAIN #define OVERRUN_SENTRY 250 static void my_printf(const char * fmt, ...) From f024e0d5e9232426a96434efe374a879c0df783f Mon Sep 17 00:00:00 2001 From: Vladislav Vaintroub Date: Fri, 24 Aug 2012 15:30:05 +0200 Subject: [PATCH 127/164] MDEV-484 : allow compilation/packaging on Windows with newly released VS2012 --- win/packaging/ca/CMakeLists.txt | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/win/packaging/ca/CMakeLists.txt b/win/packaging/ca/CMakeLists.txt index 940e9e3a7d1..0da1e5d67b1 100644 --- a/win/packaging/ca/CMakeLists.txt +++ b/win/packaging/ca/CMakeLists.txt @@ -33,7 +33,7 @@ IF(MSVC_VERSION EQUAL 1400) ELSEIF(MSVC_VERSION EQUAL 1500) SET(WIX35_MSVC_SUFFIX "_2008") SET(WIX36_MSVC_SUFFIX "VS2008") -ELSEIF(MSVC_VERSION EQUAL 1600) +ELSEIF(MSVC_VERSION EQUAL 1600 OR MSVC_VERSION EQUAL 1700 ) SET(WIX35_MSVC_SUFFIX "_2010") SET(WIX36_MSVC_SUFFIX "VS2010") ELSE() From 077e453f9f61a123c9fabc66e62ced35922b09b8 Mon Sep 17 00:00:00 2001 From: unknown Date: Fri, 24 Aug 2012 15:32:44 +0200 Subject: [PATCH 128/164] Fix compiler warnings --- include/m_string.h | 3 +-- mysys/mf_iocache2.c | 2 +- 2 files changed, 2 insertions(+), 3 deletions(-) diff --git a/include/m_string.h b/include/m_string.h index be9af2ad558..71d8100e53f 100644 --- a/include/m_string.h +++ b/include/m_string.h @@ -249,8 +249,7 @@ extern ulonglong strtoull(const char *str, char **ptr, int base); extern size_t my_vsnprintf(char *str, size_t n, const char *format, va_list ap); -extern size_t my_snprintf(char *to, size_t n, const char *fmt, ...) - ATTRIBUTE_FORMAT(printf, 3, 4); +extern size_t my_snprintf(char *to, size_t n, const char *fmt, ...); #if defined(__cplusplus) } diff --git a/mysys/mf_iocache2.c b/mysys/mf_iocache2.c index 7c967cf1bf2..5836314b742 100644 --- a/mysys/mf_iocache2.c +++ b/mysys/mf_iocache2.c @@ -437,7 +437,7 @@ process_flags: /* TODO: implement precision */ if (backtick_quoting) { - size_t total= my_b_write_backtick_quote(info, (uchar *) par, length2); + size_t total= my_b_write_backtick_quote(info, par, length2); if (total == (size_t)-1) goto err; out_length+= total; From f37610ecb4c7917f1dd3015eb897b4ff41cd2b57 Mon Sep 17 00:00:00 2001 From: unknown Date: Fri, 24 Aug 2012 19:11:54 +0200 Subject: [PATCH 129/164] Fix compiler warning --- sql/mysql_priv.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sql/mysql_priv.h b/sql/mysql_priv.h index f7a5f05ae9a..337825fa857 100644 --- a/sql/mysql_priv.h +++ b/sql/mysql_priv.h @@ -845,7 +845,7 @@ Item *negate_expression(THD *thd, Item *expr); /* log.cc */ int vprint_msg_to_log(enum loglevel level, const char *format, va_list args); -void sql_print_error(const char *format, ...) ATTRIBUTE_FORMAT(printf, 1, 2); +void sql_print_error(const char *format, ...); void sql_print_warning(const char *format, ...) ATTRIBUTE_FORMAT(printf, 1, 2); void sql_print_information(const char *format, ...) ATTRIBUTE_FORMAT(printf, 1, 2); From 4d2b05b7d795bfa980065b4f4465444549401c9f Mon Sep 17 00:00:00 2001 From: unknown Date: Sat, 25 Aug 2012 09:15:57 +0300 Subject: [PATCH 130/164] fix for MDEV-367 The problem was that was_null and null_value variables was reset in each reexecution of IN subquery, but engine rerun only for non-constant subqueries. Fixed checking constant in Item_equal sort. Fix constant reporting in Item_subselect. --- mysql-test/r/subselect.result | 26 +++++++++++++++++++++++ mysql-test/r/subselect_no_mat.result | 26 +++++++++++++++++++++++ mysql-test/r/subselect_no_opts.result | 26 +++++++++++++++++++++++ mysql-test/r/subselect_no_scache.result | 26 +++++++++++++++++++++++ mysql-test/r/subselect_no_semijoin.result | 26 +++++++++++++++++++++++ mysql-test/t/subselect.test | 21 ++++++++++++++++++ sql/item_subselect.cc | 26 ++++++++++++++++++++++- sql/sql_select.cc | 4 ++-- sql/sql_union.cc | 2 ++ 9 files changed, 180 insertions(+), 3 deletions(-) diff --git a/mysql-test/r/subselect.result b/mysql-test/r/subselect.result index 024dca5d1bb..5126e6b8d5b 100644 --- a/mysql-test/r/subselect.result +++ b/mysql-test/r/subselect.result @@ -6137,5 +6137,31 @@ NULL UNION RESULT ALL NULL NULL NULL NULL NULL SELECT MIN(a) AS min_a, a FROM t1 WHERE 1=2 HAVING a NOT IN ( SELECT a from t1 UNION select a+1 from t1 ) OR min_a != 1; min_a a drop table t1; +# +# MDEV-367: Different results with and without subquery_cache on +# a query with a constant NOT IN condition +# +CREATE TABLE t1 (a INT) ENGINE=MyISAM; +INSERT INTO t1 VALUES (1),(2),(3); +set @mdev367_optimizer_switch = @@optimizer_switch; +set optimizer_switch = 'subquery_cache=on'; +SELECT * FROM t1 WHERE ( 3, 3 ) NOT IN ( SELECT NULL, NULL ) OR a > 100; +a +SELECT *, ( 3, 3 ) NOT IN ( SELECT NULL, NULL ) FROM t1; +a ( 3, 3 ) NOT IN ( SELECT NULL, NULL ) +1 NULL +2 NULL +3 NULL +set optimizer_switch=@mdev367_optimizer_switch; +set optimizer_switch = 'subquery_cache=off'; +SELECT * FROM t1 WHERE ( 3, 3 ) NOT IN ( SELECT NULL, NULL ) OR a > 100; +a +SELECT *, ( 3, 3 ) NOT IN ( SELECT NULL, NULL ) FROM t1; +a ( 3, 3 ) NOT IN ( SELECT NULL, NULL ) +1 NULL +2 NULL +3 NULL +set optimizer_switch=@mdev367_optimizer_switch; +DROP TABLE t1; # return optimizer switch changed in the beginning of this test set optimizer_switch=@subselect_tmp; diff --git a/mysql-test/r/subselect_no_mat.result b/mysql-test/r/subselect_no_mat.result index e8c084f9700..ad56c1c2f49 100644 --- a/mysql-test/r/subselect_no_mat.result +++ b/mysql-test/r/subselect_no_mat.result @@ -6136,6 +6136,32 @@ NULL UNION RESULT ALL NULL NULL NULL NULL NULL SELECT MIN(a) AS min_a, a FROM t1 WHERE 1=2 HAVING a NOT IN ( SELECT a from t1 UNION select a+1 from t1 ) OR min_a != 1; min_a a drop table t1; +# +# MDEV-367: Different results with and without subquery_cache on +# a query with a constant NOT IN condition +# +CREATE TABLE t1 (a INT) ENGINE=MyISAM; +INSERT INTO t1 VALUES (1),(2),(3); +set @mdev367_optimizer_switch = @@optimizer_switch; +set optimizer_switch = 'subquery_cache=on'; +SELECT * FROM t1 WHERE ( 3, 3 ) NOT IN ( SELECT NULL, NULL ) OR a > 100; +a +SELECT *, ( 3, 3 ) NOT IN ( SELECT NULL, NULL ) FROM t1; +a ( 3, 3 ) NOT IN ( SELECT NULL, NULL ) +1 NULL +2 NULL +3 NULL +set optimizer_switch=@mdev367_optimizer_switch; +set optimizer_switch = 'subquery_cache=off'; +SELECT * FROM t1 WHERE ( 3, 3 ) NOT IN ( SELECT NULL, NULL ) OR a > 100; +a +SELECT *, ( 3, 3 ) NOT IN ( SELECT NULL, NULL ) FROM t1; +a ( 3, 3 ) NOT IN ( SELECT NULL, NULL ) +1 NULL +2 NULL +3 NULL +set optimizer_switch=@mdev367_optimizer_switch; +DROP TABLE t1; # return optimizer switch changed in the beginning of this test set optimizer_switch=@subselect_tmp; set optimizer_switch=default; diff --git a/mysql-test/r/subselect_no_opts.result b/mysql-test/r/subselect_no_opts.result index ace1f198853..92bd97593b3 100644 --- a/mysql-test/r/subselect_no_opts.result +++ b/mysql-test/r/subselect_no_opts.result @@ -6132,6 +6132,32 @@ NULL UNION RESULT ALL NULL NULL NULL NULL NULL SELECT MIN(a) AS min_a, a FROM t1 WHERE 1=2 HAVING a NOT IN ( SELECT a from t1 UNION select a+1 from t1 ) OR min_a != 1; min_a a drop table t1; +# +# MDEV-367: Different results with and without subquery_cache on +# a query with a constant NOT IN condition +# +CREATE TABLE t1 (a INT) ENGINE=MyISAM; +INSERT INTO t1 VALUES (1),(2),(3); +set @mdev367_optimizer_switch = @@optimizer_switch; +set optimizer_switch = 'subquery_cache=on'; +SELECT * FROM t1 WHERE ( 3, 3 ) NOT IN ( SELECT NULL, NULL ) OR a > 100; +a +SELECT *, ( 3, 3 ) NOT IN ( SELECT NULL, NULL ) FROM t1; +a ( 3, 3 ) NOT IN ( SELECT NULL, NULL ) +1 NULL +2 NULL +3 NULL +set optimizer_switch=@mdev367_optimizer_switch; +set optimizer_switch = 'subquery_cache=off'; +SELECT * FROM t1 WHERE ( 3, 3 ) NOT IN ( SELECT NULL, NULL ) OR a > 100; +a +SELECT *, ( 3, 3 ) NOT IN ( SELECT NULL, NULL ) FROM t1; +a ( 3, 3 ) NOT IN ( SELECT NULL, NULL ) +1 NULL +2 NULL +3 NULL +set optimizer_switch=@mdev367_optimizer_switch; +DROP TABLE t1; # return optimizer switch changed in the beginning of this test set optimizer_switch=@subselect_tmp; set @optimizer_switch_for_subselect_test=null; diff --git a/mysql-test/r/subselect_no_scache.result b/mysql-test/r/subselect_no_scache.result index 32f24f9cf14..7e2ae9606ef 100644 --- a/mysql-test/r/subselect_no_scache.result +++ b/mysql-test/r/subselect_no_scache.result @@ -6143,6 +6143,32 @@ NULL UNION RESULT ALL NULL NULL NULL NULL NULL SELECT MIN(a) AS min_a, a FROM t1 WHERE 1=2 HAVING a NOT IN ( SELECT a from t1 UNION select a+1 from t1 ) OR min_a != 1; min_a a drop table t1; +# +# MDEV-367: Different results with and without subquery_cache on +# a query with a constant NOT IN condition +# +CREATE TABLE t1 (a INT) ENGINE=MyISAM; +INSERT INTO t1 VALUES (1),(2),(3); +set @mdev367_optimizer_switch = @@optimizer_switch; +set optimizer_switch = 'subquery_cache=on'; +SELECT * FROM t1 WHERE ( 3, 3 ) NOT IN ( SELECT NULL, NULL ) OR a > 100; +a +SELECT *, ( 3, 3 ) NOT IN ( SELECT NULL, NULL ) FROM t1; +a ( 3, 3 ) NOT IN ( SELECT NULL, NULL ) +1 NULL +2 NULL +3 NULL +set optimizer_switch=@mdev367_optimizer_switch; +set optimizer_switch = 'subquery_cache=off'; +SELECT * FROM t1 WHERE ( 3, 3 ) NOT IN ( SELECT NULL, NULL ) OR a > 100; +a +SELECT *, ( 3, 3 ) NOT IN ( SELECT NULL, NULL ) FROM t1; +a ( 3, 3 ) NOT IN ( SELECT NULL, NULL ) +1 NULL +2 NULL +3 NULL +set optimizer_switch=@mdev367_optimizer_switch; +DROP TABLE t1; # return optimizer switch changed in the beginning of this test set optimizer_switch=@subselect_tmp; set optimizer_switch=default; diff --git a/mysql-test/r/subselect_no_semijoin.result b/mysql-test/r/subselect_no_semijoin.result index 3860bb9fb18..53b914a5af0 100644 --- a/mysql-test/r/subselect_no_semijoin.result +++ b/mysql-test/r/subselect_no_semijoin.result @@ -6132,6 +6132,32 @@ NULL UNION RESULT ALL NULL NULL NULL NULL NULL SELECT MIN(a) AS min_a, a FROM t1 WHERE 1=2 HAVING a NOT IN ( SELECT a from t1 UNION select a+1 from t1 ) OR min_a != 1; min_a a drop table t1; +# +# MDEV-367: Different results with and without subquery_cache on +# a query with a constant NOT IN condition +# +CREATE TABLE t1 (a INT) ENGINE=MyISAM; +INSERT INTO t1 VALUES (1),(2),(3); +set @mdev367_optimizer_switch = @@optimizer_switch; +set optimizer_switch = 'subquery_cache=on'; +SELECT * FROM t1 WHERE ( 3, 3 ) NOT IN ( SELECT NULL, NULL ) OR a > 100; +a +SELECT *, ( 3, 3 ) NOT IN ( SELECT NULL, NULL ) FROM t1; +a ( 3, 3 ) NOT IN ( SELECT NULL, NULL ) +1 NULL +2 NULL +3 NULL +set optimizer_switch=@mdev367_optimizer_switch; +set optimizer_switch = 'subquery_cache=off'; +SELECT * FROM t1 WHERE ( 3, 3 ) NOT IN ( SELECT NULL, NULL ) OR a > 100; +a +SELECT *, ( 3, 3 ) NOT IN ( SELECT NULL, NULL ) FROM t1; +a ( 3, 3 ) NOT IN ( SELECT NULL, NULL ) +1 NULL +2 NULL +3 NULL +set optimizer_switch=@mdev367_optimizer_switch; +DROP TABLE t1; # return optimizer switch changed in the beginning of this test set optimizer_switch=@subselect_tmp; set @optimizer_switch_for_subselect_test=null; diff --git a/mysql-test/t/subselect.test b/mysql-test/t/subselect.test index a476551ff08..70682842ee1 100644 --- a/mysql-test/t/subselect.test +++ b/mysql-test/t/subselect.test @@ -5208,5 +5208,26 @@ SELECT MIN(a) AS min_a, a FROM t1 WHERE 1=2 HAVING a NOT IN ( SELECT a from t1 U drop table t1; +--echo # +--echo # MDEV-367: Different results with and without subquery_cache on +--echo # a query with a constant NOT IN condition +--echo # +CREATE TABLE t1 (a INT) ENGINE=MyISAM; +INSERT INTO t1 VALUES (1),(2),(3); + +set @mdev367_optimizer_switch = @@optimizer_switch; + +set optimizer_switch = 'subquery_cache=on'; +SELECT * FROM t1 WHERE ( 3, 3 ) NOT IN ( SELECT NULL, NULL ) OR a > 100; +SELECT *, ( 3, 3 ) NOT IN ( SELECT NULL, NULL ) FROM t1; +set optimizer_switch=@mdev367_optimizer_switch; + +set optimizer_switch = 'subquery_cache=off'; +SELECT * FROM t1 WHERE ( 3, 3 ) NOT IN ( SELECT NULL, NULL ) OR a > 100; +SELECT *, ( 3, 3 ) NOT IN ( SELECT NULL, NULL ) FROM t1; +set optimizer_switch=@mdev367_optimizer_switch; + +DROP TABLE t1; + --echo # return optimizer switch changed in the beginning of this test set optimizer_switch=@subselect_tmp; diff --git a/sql/item_subselect.cc b/sql/item_subselect.cc index bd55d196704..7063f87c676 100644 --- a/sql/item_subselect.cc +++ b/sql/item_subselect.cc @@ -765,7 +765,9 @@ table_map Item_subselect::used_tables() const bool Item_subselect::const_item() const { - return thd->lex->context_analysis_only ? FALSE : const_item_cache; + return (thd->lex->context_analysis_only ? + FALSE : + forced_const || const_item_cache); } Item *Item_subselect::get_tmp_table_item(THD *thd_arg) @@ -1484,6 +1486,10 @@ double Item_in_subselect::val_real() */ DBUG_ASSERT(0); DBUG_ASSERT(fixed == 1); + if (forced_const) + return value; + DBUG_ASSERT((engine->uncacheable() & ~UNCACHEABLE_EXPLAIN) || + ! engine->is_executed()); null_value= was_null= FALSE; if (exec()) { @@ -1504,6 +1510,10 @@ longlong Item_in_subselect::val_int() */ DBUG_ASSERT(0); DBUG_ASSERT(fixed == 1); + if (forced_const) + return value; + DBUG_ASSERT((engine->uncacheable() & ~UNCACHEABLE_EXPLAIN) || + ! engine->is_executed()); null_value= was_null= FALSE; if (exec()) { @@ -1524,6 +1534,10 @@ String *Item_in_subselect::val_str(String *str) */ DBUG_ASSERT(0); DBUG_ASSERT(fixed == 1); + if (forced_const) + goto value_is_ready; + DBUG_ASSERT((engine->uncacheable() & ~UNCACHEABLE_EXPLAIN) || + ! engine->is_executed()); null_value= was_null= FALSE; if (exec()) { @@ -1535,6 +1549,7 @@ String *Item_in_subselect::val_str(String *str) null_value= TRUE; return 0; } +value_is_ready: str->set((ulonglong)value, &my_charset_bin); return str; } @@ -1545,6 +1560,8 @@ bool Item_in_subselect::val_bool() DBUG_ASSERT(fixed == 1); if (forced_const) return value; + DBUG_ASSERT((engine->uncacheable() & ~UNCACHEABLE_EXPLAIN) || + ! engine->is_executed()); null_value= was_null= FALSE; if (exec()) { @@ -1563,6 +1580,10 @@ my_decimal *Item_in_subselect::val_decimal(my_decimal *decimal_value) method should not be used */ DBUG_ASSERT(0); + if (forced_const) + goto value_is_ready; + DBUG_ASSERT((engine->uncacheable() & ~UNCACHEABLE_EXPLAIN) || + ! engine->is_executed()); null_value= was_null= FALSE; DBUG_ASSERT(fixed == 1); if (exec()) @@ -1572,6 +1593,7 @@ my_decimal *Item_in_subselect::val_decimal(my_decimal *decimal_value) } if (was_null && !value) null_value= TRUE; +value_is_ready: int2my_decimal(E_DEC_FATAL_ERROR, value, 0, decimal_value); return decimal_value; } @@ -3117,6 +3139,8 @@ int subselect_single_select_engine::exec() tab->read_record.read_record= tab->save_read_record; } executed= 1; + if (!(uncacheable() & ~UNCACHEABLE_EXPLAIN)) + item->make_const(); thd->where= save_where; thd->lex->current_select= save_select; DBUG_RETURN(join->error || thd->is_fatal_error || thd->is_error()); diff --git a/sql/sql_select.cc b/sql/sql_select.cc index 14641ee6b04..5f2e97d57c1 100644 --- a/sql/sql_select.cc +++ b/sql/sql_select.cc @@ -11621,9 +11621,9 @@ static int compare_fields_by_table_order(Item *field1, bool outer_ref= 0; Item_field *f1= (Item_field *) (field1->real_item()); Item_field *f2= (Item_field *) (field2->real_item()); - if (f1->const_item()) + if (field1->const_item() || f1->const_item()) return 1; - if (f2->const_item()) + if (field2->const_item() || f2->const_item()) return -1; if (f2->used_tables() & OUTER_REF_TABLE_BIT) { diff --git a/sql/sql_union.cc b/sql/sql_union.cc index 5c235fd1778..942392c4c98 100644 --- a/sql/sql_union.cc +++ b/sql/sql_union.cc @@ -616,6 +616,8 @@ bool st_select_lex_unit::exec() if (executed && !uncacheable && !describe) DBUG_RETURN(FALSE); executed= 1; + if (!(uncacheable & ~UNCACHEABLE_EXPLAIN) && item) + item->make_const(); saved_error= optimize(); From e988c4dde6c1b88523b1d4e748cbd4f5025b128d Mon Sep 17 00:00:00 2001 From: Sergei Golubchik Date: Fri, 24 Aug 2012 23:43:18 +0200 Subject: [PATCH 131/164] MDEV-336 oqgraph 5.5 crashes in buildbot force -fno-strict-aliasing for oqgraph --- storage/oqgraph/Makefile.am | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/storage/oqgraph/Makefile.am b/storage/oqgraph/Makefile.am index e99e134db02..052c0e9a773 100644 --- a/storage/oqgraph/Makefile.am +++ b/storage/oqgraph/Makefile.am @@ -38,7 +38,7 @@ BOOST_CXXFLAGS = -frtti -fexceptions -fimplicit-templates # it also makes an extra register available in many functions. # It also makes debugging impossible on some machines. # (automatically gets enabled anyway by -O* on some architectures) -BOOST_CXXFLAGS+= -O3 -fstrict-aliasing +BOOST_CXXFLAGS+= -O3 -fno-strict-aliasing BOOST_CXXFLAGS+= -falign-loops if HAVE_FVISIBILITY_INLINES_HIDDEN BOOST_CXXFLAGS+= -fvisibility-inlines-hidden From da3a1c815689d81bd0ef720202536d7180825435 Mon Sep 17 00:00:00 2001 From: Sergey Petrunya Date: Tue, 28 Aug 2012 13:51:01 +0400 Subject: [PATCH 132/164] Fix bugs in BatchedKeyAccess that show up when working with a storage engine in HA_MRR_NO_ASSOCIATION mode. (there is no testcase because we don't ship any such engines currently) --- sql/sql_join_cache.cc | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/sql/sql_join_cache.cc b/sql/sql_join_cache.cc index d49be2e446c..5c803f85c49 100644 --- a/sql/sql_join_cache.cc +++ b/sql/sql_join_cache.cc @@ -3875,8 +3875,9 @@ int JOIN_TAB_SCAN_MRR::next() If a record in in an incremental cache contains no fields then the association for the last record in cache will be equal to cache->end_pos */ - DBUG_ASSERT(cache->buff <= (uchar *) (*ptr) && - (uchar *) (*ptr) <= cache->end_pos); + DBUG_ASSERT((!(mrr_mode & HA_MRR_NO_ASSOCIATION))? + (cache->buff <= (uchar *) (*ptr) && + (uchar *) (*ptr) <= cache->end_pos): TRUE); if (join_tab->table->vfield) update_virtual_fields(join->thd, join_tab->table); } @@ -4542,7 +4543,7 @@ bool JOIN_CACHE_BKAH::prepare_look_for_matches(bool skip_last) { last_matching_rec_ref_ptr= next_matching_rec_ref_ptr= 0; if (no_association && - (curr_matching_chain= get_matching_chain_by_join_key())) + !(curr_matching_chain= get_matching_chain_by_join_key())) return 1; last_matching_rec_ref_ptr= get_next_rec_ref(curr_matching_chain); return 0; From ac982b0a21c0df1093d116101ddee3395232ab3f Mon Sep 17 00:00:00 2001 From: Alexey Botchkov Date: Tue, 28 Aug 2012 15:07:50 +0500 Subject: [PATCH 133/164] MDEV-471 update help tables. the fill_help_table-5.5.sql file was copied into mariadb. per-file comments: scripts/fill_help_tables.sql MDEV-471 update help tables. --- scripts/fill_help_tables.sql | 3946 +++++++++++++++++----------------- 1 file changed, 2003 insertions(+), 1943 deletions(-) diff --git a/scripts/fill_help_tables.sql b/scripts/fill_help_tables.sql index 7751c37cbc3..939f15ed45a 100644 --- a/scripts/fill_help_tables.sql +++ b/scripts/fill_help_tables.sql @@ -1,18 +1,19 @@ --- Copyright (c) 2003, &year, Oracle and/or its affiliates. All rights reserved. --- Copyright (C) 2011 Monty Program Ab --- +-- Copyright (c) 2003, 2008-2012, Oracle and/or its affiliates. All rights reserved. +-- -- This program is free software; you can redistribute it and/or modify -- it under the terms of the GNU General Public License as published by -- the Free Software Foundation; version 2 of the License. --- +-- -- This program is distributed in the hope that it will be useful, -- but WITHOUT ANY WARRANTY; without even the implied warranty of -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -- GNU General Public License for more details. --- +-- -- You should have received a copy of the GNU General Public License -- along with this program; if not, write to the Free Software --- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +-- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + +-- DO NOT EDIT THIS FILE. It is generated automatically. -- To use this file, load its contents into the mysql database. For example, -- with the mysql client program, process the file like this, where @@ -28,547 +29,553 @@ delete from help_keyword; delete from help_relation; insert into help_category (help_category_id,name,parent_category_id,url) values (1,'Geographic',0,''); -insert into help_category (help_category_id,name,parent_category_id,url) values (2,'Polygon properties',32,''); -insert into help_category (help_category_id,name,parent_category_id,url) values (3,'WKT',32,''); -insert into help_category (help_category_id,name,parent_category_id,url) values (4,'Numeric Functions',36,''); -insert into help_category (help_category_id,name,parent_category_id,url) values (5,'Plugins',33,''); -insert into help_category (help_category_id,name,parent_category_id,url) values (6,'MBR',32,''); -insert into help_category (help_category_id,name,parent_category_id,url) values (7,'Control flow functions',36,''); -insert into help_category (help_category_id,name,parent_category_id,url) values (8,'Transactions',33,''); -insert into help_category (help_category_id,name,parent_category_id,url) values (9,'Account Management',33,''); -insert into help_category (help_category_id,name,parent_category_id,url) values (10,'Point properties',32,''); -insert into help_category (help_category_id,name,parent_category_id,url) values (11,'Encryption Functions',36,''); -insert into help_category (help_category_id,name,parent_category_id,url) values (12,'LineString properties',32,''); -insert into help_category (help_category_id,name,parent_category_id,url) values (13,'Logical operators',36,''); -insert into help_category (help_category_id,name,parent_category_id,url) values (14,'Miscellaneous Functions',36,''); -insert into help_category (help_category_id,name,parent_category_id,url) values (15,'Information Functions',36,''); -insert into help_category (help_category_id,name,parent_category_id,url) values (16,'Functions and Modifiers for Use with GROUP BY',33,''); -insert into help_category (help_category_id,name,parent_category_id,url) values (17,'Comparison operators',36,''); -insert into help_category (help_category_id,name,parent_category_id,url) values (18,'Bit Functions',36,''); -insert into help_category (help_category_id,name,parent_category_id,url) values (19,'Table Maintenance',33,''); -insert into help_category (help_category_id,name,parent_category_id,url) values (20,'Data Types',33,''); -insert into help_category (help_category_id,name,parent_category_id,url) values (21,'User-Defined Functions',33,''); -insert into help_category (help_category_id,name,parent_category_id,url) values (22,'Compound Statements',33,''); -insert into help_category (help_category_id,name,parent_category_id,url) values (23,'Geometry constructors',32,''); -insert into help_category (help_category_id,name,parent_category_id,url) values (24,'GeometryCollection properties',1,''); -insert into help_category (help_category_id,name,parent_category_id,url) values (25,'Administration',33,''); -insert into help_category (help_category_id,name,parent_category_id,url) values (26,'Data Manipulation',33,''); -insert into help_category (help_category_id,name,parent_category_id,url) values (27,'Utility',33,''); -insert into help_category (help_category_id,name,parent_category_id,url) values (28,'Language Structure',33,''); -insert into help_category (help_category_id,name,parent_category_id,url) values (29,'Geometry relations',32,''); -insert into help_category (help_category_id,name,parent_category_id,url) values (30,'Date and Time Functions',36,''); -insert into help_category (help_category_id,name,parent_category_id,url) values (31,'WKB',32,''); -insert into help_category (help_category_id,name,parent_category_id,url) values (32,'Geographic Features',33,''); -insert into help_category (help_category_id,name,parent_category_id,url) values (33,'Contents',0,''); -insert into help_category (help_category_id,name,parent_category_id,url) values (34,'Geometry properties',32,''); -insert into help_category (help_category_id,name,parent_category_id,url) values (35,'String Functions',36,''); -insert into help_category (help_category_id,name,parent_category_id,url) values (36,'Functions',33,''); -insert into help_category (help_category_id,name,parent_category_id,url) values (37,'Data Definition',33,''); +insert into help_category (help_category_id,name,parent_category_id,url) values (2,'Polygon properties',34,''); +insert into help_category (help_category_id,name,parent_category_id,url) values (3,'WKT',34,''); +insert into help_category (help_category_id,name,parent_category_id,url) values (4,'Numeric Functions',38,''); +insert into help_category (help_category_id,name,parent_category_id,url) values (5,'Plugins',35,''); +insert into help_category (help_category_id,name,parent_category_id,url) values (6,'MBR',34,''); +insert into help_category (help_category_id,name,parent_category_id,url) values (7,'Control flow functions',38,''); +insert into help_category (help_category_id,name,parent_category_id,url) values (8,'Transactions',35,''); +insert into help_category (help_category_id,name,parent_category_id,url) values (9,'Help Metadata',35,''); +insert into help_category (help_category_id,name,parent_category_id,url) values (10,'Account Management',35,''); +insert into help_category (help_category_id,name,parent_category_id,url) values (11,'Point properties',34,''); +insert into help_category (help_category_id,name,parent_category_id,url) values (12,'Encryption Functions',38,''); +insert into help_category (help_category_id,name,parent_category_id,url) values (13,'LineString properties',34,''); +insert into help_category (help_category_id,name,parent_category_id,url) values (14,'Miscellaneous Functions',38,''); +insert into help_category (help_category_id,name,parent_category_id,url) values (15,'Logical operators',38,''); +insert into help_category (help_category_id,name,parent_category_id,url) values (16,'Functions and Modifiers for Use with GROUP BY',35,''); +insert into help_category (help_category_id,name,parent_category_id,url) values (17,'Information Functions',38,''); +insert into help_category (help_category_id,name,parent_category_id,url) values (18,'Comparison operators',38,''); +insert into help_category (help_category_id,name,parent_category_id,url) values (19,'Bit Functions',38,''); +insert into help_category (help_category_id,name,parent_category_id,url) values (20,'Table Maintenance',35,''); +insert into help_category (help_category_id,name,parent_category_id,url) values (21,'User-Defined Functions',35,''); +insert into help_category (help_category_id,name,parent_category_id,url) values (22,'Data Types',35,''); +insert into help_category (help_category_id,name,parent_category_id,url) values (23,'Compound Statements',35,''); +insert into help_category (help_category_id,name,parent_category_id,url) values (24,'Geometry constructors',34,''); +insert into help_category (help_category_id,name,parent_category_id,url) values (25,'GeometryCollection properties',1,''); +insert into help_category (help_category_id,name,parent_category_id,url) values (26,'Administration',35,''); +insert into help_category (help_category_id,name,parent_category_id,url) values (27,'Data Manipulation',35,''); +insert into help_category (help_category_id,name,parent_category_id,url) values (28,'Utility',35,''); +insert into help_category (help_category_id,name,parent_category_id,url) values (29,'Language Structure',35,''); +insert into help_category (help_category_id,name,parent_category_id,url) values (30,'Geometry relations',34,''); +insert into help_category (help_category_id,name,parent_category_id,url) values (31,'Date and Time Functions',38,''); +insert into help_category (help_category_id,name,parent_category_id,url) values (32,'WKB',34,''); +insert into help_category (help_category_id,name,parent_category_id,url) values (33,'Procedures',35,''); +insert into help_category (help_category_id,name,parent_category_id,url) values (34,'Geographic Features',35,''); +insert into help_category (help_category_id,name,parent_category_id,url) values (35,'Contents',0,''); +insert into help_category (help_category_id,name,parent_category_id,url) values (36,'Geometry properties',34,''); +insert into help_category (help_category_id,name,parent_category_id,url) values (37,'String Functions',38,''); +insert into help_category (help_category_id,name,parent_category_id,url) values (38,'Functions',35,''); +insert into help_category (help_category_id,name,parent_category_id,url) values (39,'Data Definition',35,''); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (0,16,'MIN','Syntax:\nMIN([DISTINCT] expr)\n\nReturns the minimum value of expr. MIN() may take a string argument; in\nsuch cases, it returns the minimum string value. See\nhttp://dev.mysql.com/doc/refman/5.1/en/mysql-indexes.html. The DISTINCT\nkeyword can be used to find the minimum of the distinct values of expr,\nhowever, this produces the same result as omitting DISTINCT.\n\nMIN() returns NULL if there were no matching rows.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/group-by-functions.html\n\n','mysql> SELECT student_name, MIN(test_score), MAX(test_score)\n -> FROM student\n -> GROUP BY student_name;\n','http://dev.mysql.com/doc/refman/5.1/en/group-by-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (1,26,'JOIN','MySQL supports the following JOIN syntaxes for the table_references\npart of SELECT statements and multiple-table DELETE and UPDATE\nstatements:\n\ntable_references:\n table_reference [, table_reference] ...\n\ntable_reference:\n table_factor\n | join_table\n\ntable_factor:\n tbl_name [[AS] alias] [index_hint_list]\n | table_subquery [AS] alias\n | ( table_references )\n | { OJ table_reference LEFT OUTER JOIN table_reference\n ON conditional_expr }\n\njoin_table:\n table_reference [INNER | CROSS] JOIN table_factor [join_condition]\n | table_reference STRAIGHT_JOIN table_factor\n | table_reference STRAIGHT_JOIN table_factor ON conditional_expr\n | table_reference {LEFT|RIGHT} [OUTER] JOIN table_reference join_condition\n | table_reference NATURAL [{LEFT|RIGHT} [OUTER]] JOIN table_factor\n\njoin_condition:\n ON conditional_expr\n | USING (column_list)\n\nindex_hint_list:\n index_hint [, index_hint] ...\n\nindex_hint:\n USE {INDEX|KEY}\n [{FOR {JOIN|ORDER BY|GROUP BY}] ([index_list])\n | IGNORE {INDEX|KEY}\n [{FOR {JOIN|ORDER BY|GROUP BY}] (index_list)\n | FORCE {INDEX|KEY}\n [{FOR {JOIN|ORDER BY|GROUP BY}] (index_list)\n\nindex_list:\n index_name [, index_name] ...\n\nA table reference is also known as a join expression.\n\nThe syntax of table_factor is extended in comparison with the SQL\nStandard. The latter accepts only table_reference, not a list of them\ninside a pair of parentheses.\n\nThis is a conservative extension if we consider each comma in a list of\ntable_reference items as equivalent to an inner join. For example:\n\nSELECT * FROM t1 LEFT JOIN (t2, t3, t4)\n ON (t2.a=t1.a AND t3.b=t1.b AND t4.c=t1.c)\n\nis equivalent to:\n\nSELECT * FROM t1 LEFT JOIN (t2 CROSS JOIN t3 CROSS JOIN t4)\n ON (t2.a=t1.a AND t3.b=t1.b AND t4.c=t1.c)\n\nIn MySQL, CROSS JOIN is a syntactic equivalent to INNER JOIN (they can\nreplace each other). In standard SQL, they are not equivalent. INNER\nJOIN is used with an ON clause, CROSS JOIN is used otherwise.\n\nIn general, parentheses can be ignored in join expressions containing\nonly inner join operations. MySQL also supports nested joins (see\nhttp://dev.mysql.com/doc/refman/5.1/en/nested-join-optimization.html).\n\nIndex hints can be specified to affect how the MySQL optimizer makes\nuse of indexes. For more information, see\nhttp://dev.mysql.com/doc/refman/5.1/en/index-hints.html.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/join.html\n\n','SELECT left_tbl.*\n FROM left_tbl LEFT JOIN right_tbl ON left_tbl.id = right_tbl.id\n WHERE right_tbl.id IS NULL;\n','http://dev.mysql.com/doc/refman/5.1/en/join.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (2,35,'HEX','Syntax:\nHEX(N_or_S)\n\nIf N_or_S is a number, returns a string representation of the\nhexadecimal value of N, where N is a longlong (BIGINT) number. This is\nequivalent to CONV(N,10,16).\n\nIf N_or_S is a string, returns a hexadecimal string representation of\nN_or_S where each character in N_or_S is converted to two hexadecimal\ndigits. The inverse of this operation is performed by the UNHEX()\nfunction.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','mysql> SELECT HEX(255);\n -> \'FF\'\nmysql> SELECT 0x616263;\n -> \'abc\'\nmysql> SELECT HEX(\'abc\');\n -> 616263\n','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (3,26,'REPLACE','Syntax:\nREPLACE [LOW_PRIORITY | DELAYED]\n [INTO] tbl_name [(col_name,...)]\n {VALUES | VALUE} ({expr | DEFAULT},...),(...),...\n\nOr:\n\nREPLACE [LOW_PRIORITY | DELAYED]\n [INTO] tbl_name\n SET col_name={expr | DEFAULT}, ...\n\nOr:\n\nREPLACE [LOW_PRIORITY | DELAYED]\n [INTO] tbl_name [(col_name,...)]\n SELECT ...\n\nREPLACE works exactly like INSERT, except that if an old row in the\ntable has the same value as a new row for a PRIMARY KEY or a UNIQUE\nindex, the old row is deleted before the new row is inserted. See [HELP\nINSERT].\n\nREPLACE is a MySQL extension to the SQL standard. It either inserts, or\ndeletes and inserts. For another MySQL extension to standard SQL ---\nthat either inserts or updates --- see\nhttp://dev.mysql.com/doc/refman/5.1/en/insert-on-duplicate.html.\n\nNote that unless the table has a PRIMARY KEY or UNIQUE index, using a\nREPLACE statement makes no sense. It becomes equivalent to INSERT,\nbecause there is no index to be used to determine whether a new row\nduplicates another.\n\nValues for all columns are taken from the values specified in the\nREPLACE statement. Any missing columns are set to their default values,\njust as happens for INSERT. You cannot refer to values from the current\nrow and use them in the new row. If you use an assignment such as SET\ncol_name = col_name + 1, the reference to the column name on the right\nhand side is treated as DEFAULT(col_name), so the assignment is\nequivalent to SET col_name = DEFAULT(col_name) + 1.\n\nTo use REPLACE, you must have both the INSERT and DELETE privileges for\nthe table.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/replace.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/replace.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (4,29,'CONTAINS','Contains(g1,g2)\n\nReturns 1 or 0 to indicate whether g1 completely contains g2. This\ntests the opposite relationship as Within().\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/functions-that-test-spatial-relationships-between-geometries.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/functions-that-test-spatial-relationships-between-geometries.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (5,34,'SRID','SRID(g)\n\nReturns an integer indicating the Spatial Reference System ID for the\ngeometry value g.\n\nIn MySQL, the SRID value is just an integer associated with the\ngeometry value. All calculations are done assuming Euclidean (planar)\ngeometry.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#general-geometry-property-functions\n\n','mysql> SELECT SRID(GeomFromText(\'LineString(1 1,2 2)\',101));\n+-----------------------------------------------+\n| SRID(GeomFromText(\'LineString(1 1,2 2)\',101)) |\n+-----------------------------------------------+\n| 101 |\n+-----------------------------------------------+\n','http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#general-geometry-property-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (6,30,'CURRENT_TIMESTAMP','Syntax:\nCURRENT_TIMESTAMP, CURRENT_TIMESTAMP()\n\nCURRENT_TIMESTAMP and CURRENT_TIMESTAMP() are synonyms for NOW().\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (7,25,'SHOW CONTRIBUTORS','Syntax:\nSHOW CONTRIBUTORS\n\nThe SHOW CONTRIBUTORS statement displays information about the people\nwho contribute to MySQL source or to causes that we support. For each\ncontributor, it displays Name, Location, and Comment values.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-contributors.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/show-contributors.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (8,16,'VARIANCE','Syntax:\nVARIANCE(expr)\n\nReturns the population standard variance of expr. This is an extension\nto standard SQL. The standard SQL function VAR_POP() can be used\ninstead.\n\nVARIANCE() returns NULL if there were no matching rows.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/group-by-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/group-by-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (9,37,'DROP SERVER','Syntax:\nDROP SERVER [ IF EXISTS ] server_name\n\nDrops the server definition for the server named server_name. The\ncorresponding row within the mysql.servers table will be deleted. This\nstatement requires the SUPER privilege.\n\nDropping a server for a table does not affect any FEDERATED tables that\nused this connection information when they were created. See [HELP\nCREATE SERVER].\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/drop-server.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/drop-server.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (10,25,'SHOW AUTHORS','Syntax:\nSHOW AUTHORS\n\nThe SHOW AUTHORS statement displays information about the people who\nwork on MySQL. For each author, it displays Name, Location, and Comment\nvalues.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-authors.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/show-authors.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (11,16,'VAR_SAMP','Syntax:\nVAR_SAMP(expr)\n\nReturns the sample variance of expr. That is, the denominator is the\nnumber of rows minus one.\n\nVAR_SAMP() returns NULL if there were no matching rows.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/group-by-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/group-by-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (12,35,'CONCAT','Syntax:\nCONCAT(str1,str2,...)\n\nReturns the string that results from concatenating the arguments. May\nhave one or more arguments. If all arguments are nonbinary strings, the\nresult is a nonbinary string. If the arguments include any binary\nstrings, the result is a binary string. A numeric argument is converted\nto its equivalent binary string form; if you want to avoid that, you\ncan use an explicit type cast, as in this example:\n\nSELECT CONCAT(CAST(int_col AS CHAR), char_col);\n\nCONCAT() returns NULL if any argument is NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','mysql> SELECT CONCAT(\'My\', \'S\', \'QL\');\n -> \'MySQL\'\nmysql> SELECT CONCAT(\'My\', NULL, \'QL\');\n -> NULL\nmysql> SELECT CONCAT(14.3);\n -> \'14.3\'\n','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (13,32,'GEOMETRY HIERARCHY','Geometry is the base class. It is an abstract class. The instantiable\nsubclasses of Geometry are restricted to zero-, one-, and\ntwo-dimensional geometric objects that exist in two-dimensional\ncoordinate space. All instantiable geometry classes are defined so that\nvalid instances of a geometry class are topologically closed (that is,\nall defined geometries include their boundary).\n\nThe base Geometry class has subclasses for Point, Curve, Surface, and\nGeometryCollection:\n\no Point represents zero-dimensional objects.\n\no Curve represents one-dimensional objects, and has subclass\n LineString, with sub-subclasses Line and LinearRing.\n\no Surface is designed for two-dimensional objects and has subclass\n Polygon.\n\no GeometryCollection has specialized zero-, one-, and two-dimensional\n collection classes named MultiPoint, MultiLineString, and\n MultiPolygon for modeling geometries corresponding to collections of\n Points, LineStrings, and Polygons, respectively. MultiCurve and\n MultiSurface are introduced as abstract superclasses that generalize\n the collection interfaces to handle Curves and Surfaces.\n\nGeometry, Curve, Surface, MultiCurve, and MultiSurface are defined as\nnoninstantiable classes. They define a common set of methods for their\nsubclasses and are included for extensibility.\n\nPoint, LineString, Polygon, GeometryCollection, MultiPoint,\nMultiLineString, and MultiPolygon are instantiable classes.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/gis-geometry-class-hierarchy.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/gis-geometry-class-hierarchy.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (14,35,'CHAR FUNCTION','Syntax:\nCHAR(N,... [USING charset_name])\n\nCHAR() interprets each argument N as an integer and returns a string\nconsisting of the characters given by the code values of those\nintegers. NULL values are skipped.\nBy default, CHAR() returns a binary string. To produce a string in a\ngiven character set, use the optional USING clause:\n\nmysql> SELECT CHARSET(CHAR(0x65)), CHARSET(CHAR(0x65 USING utf8));\n+---------------------+--------------------------------+\n| CHARSET(CHAR(0x65)) | CHARSET(CHAR(0x65 USING utf8)) |\n+---------------------+--------------------------------+\n| binary | utf8 |\n+---------------------+--------------------------------+\n\nIf USING is given and the result string is illegal for the given\ncharacter set, a warning is issued. Also, if strict SQL mode is\nenabled, the result from CHAR() becomes NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','mysql> SELECT CHAR(77,121,83,81,\'76\');\n -> \'MySQL\'\nmysql> SELECT CHAR(77,77.3,\'77.3\');\n -> \'MMM\'\n','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (15,20,'DATETIME','DATETIME\n\nA date and time combination. The supported range is \'1000-01-01\n00:00:00\' to \'9999-12-31 23:59:59\'. MySQL displays DATETIME values in\n\'YYYY-MM-DD HH:MM:SS\' format, but allows assignment of values to\nDATETIME columns using either strings or numbers.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-type-overview.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (16,22,'OPEN','Syntax:\nOPEN cursor_name\n\nThis statement opens a previously declared cursor.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/open.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/open.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (17,25,'SHOW CREATE TRIGGER','Syntax:\nSHOW CREATE TRIGGER trigger_name\n\nThis statement shows a CREATE TRIGGER statement that creates the given\ntrigger.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-create-trigger.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/show-create-trigger.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (18,25,'SHOW CREATE PROCEDURE','Syntax:\nSHOW CREATE PROCEDURE proc_name\n\nThis statement is a MySQL extension. It returns the exact string that\ncan be used to re-create the named stored procedure. A similar\nstatement, SHOW CREATE FUNCTION, displays information about stored\nfunctions (see [HELP SHOW CREATE FUNCTION]).\n\nBoth statements require that you be the owner of the routine or have\nSELECT access to the mysql.proc table. If you do not have privileges\nfor the routine itself, the value displayed for the Create Procedure or\nCreate Function field will be NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-create-procedure.html\n\n','mysql> SHOW CREATE PROCEDURE test.simpleproc\\G\n*************************** 1. row ***************************\n Procedure: simpleproc\n sql_mode:\n Create Procedure: CREATE PROCEDURE `simpleproc`(OUT param1 INT)\n BEGIN\n SELECT COUNT(*) INTO param1 FROM t;\n END\ncharacter_set_client: latin1\ncollation_connection: latin1_swedish_ci\n Database Collation: latin1_swedish_ci\n\nmysql> SHOW CREATE FUNCTION test.hello\\G\n*************************** 1. row ***************************\n Function: hello\n sql_mode:\n Create Function: CREATE FUNCTION `hello`(s CHAR(20))\n RETURNS CHAR(50)\n RETURN CONCAT(\'Hello, \',s,\'!\')\ncharacter_set_client: latin1\ncollation_connection: latin1_swedish_ci\n Database Collation: latin1_swedish_ci\n','http://dev.mysql.com/doc/refman/5.1/en/show-create-procedure.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (19,20,'INTEGER','INTEGER[(M)] [UNSIGNED] [ZEROFILL]\n\nThis type is a synonym for INT.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/numeric-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/numeric-type-overview.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (20,35,'LOWER','Syntax:\nLOWER(str)\n\nReturns the string str with all characters changed to lowercase\naccording to the current character set mapping. The default is latin1\n(cp1252 West European).\n\nmysql> SELECT LOWER(\'QUADRATICALLY\');\n -> \'quadratically\'\n\nLOWER() (and UPPER()) are ineffective when applied to binary strings\n(BINARY, VARBINARY, BLOB). To perform lettercase conversion, convert\nthe string to a nonbinary string:\n\nmysql> SET @str = BINARY \'New York\';\nmysql> SELECT LOWER(@str), LOWER(CONVERT(@str USING latin1));\n+-------------+-----------------------------------+\n| LOWER(@str) | LOWER(CONVERT(@str USING latin1)) |\n+-------------+-----------------------------------+\n| New York | new york |\n+-------------+-----------------------------------+\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (21,25,'SHOW COLUMNS','Syntax:\nSHOW [FULL] COLUMNS {FROM | IN} tbl_name [{FROM | IN} db_name]\n [LIKE \'pattern\' | WHERE expr]\n\nSHOW COLUMNS displays information about the columns in a given table.\nIt also works for views. The LIKE clause, if present, indicates which\ncolumn names to match. The WHERE clause can be given to select rows\nusing more general conditions, as discussed in\nhttp://dev.mysql.com/doc/refman/5.1/en/extended-show.html.\n\nmysql> SHOW COLUMNS FROM City;\n+------------+----------+------+-----+---------+----------------+\n| Field | Type | Null | Key | Default | Extra |\n+------------+----------+------+-----+---------+----------------+\n| Id | int(11) | NO | PRI | NULL | auto_increment |\n| Name | char(35) | NO | | | |\n| Country | char(3) | NO | UNI | | |\n| District | char(20) | YES | MUL | | |\n| Population | int(11) | NO | | 0 | |\n+------------+----------+------+-----+---------+----------------+\n5 rows in set (0.00 sec)\n\nIf the data types differ from what you expect them to be based on a\nCREATE TABLE statement, note that MySQL sometimes changes data types\nwhen you create or alter a table. The conditions under which this\noccurs are described in\nhttp://dev.mysql.com/doc/refman/5.1/en/silent-column-changes.html.\n\nThe FULL keyword causes the output to include the column collation and\ncomments, as well as the privileges you have for each column.\n\nYou can use db_name.tbl_name as an alternative to the tbl_name FROM\ndb_name syntax. In other words, these two statements are equivalent:\n\nmysql> SHOW COLUMNS FROM mytable FROM mydb;\nmysql> SHOW COLUMNS FROM mydb.mytable;\n\nSHOW COLUMNS displays the following values for each table column:\n\nField indicates the column name.\n\nType indicates the column data type.\n\nCollation indicates the collation for nonbinary string columns, or NULL\nfor other columns. This value is displayed only if you use the FULL\nkeyword.\n\nThe Null field contains YES if NULL values can be stored in the column,\nNO if not.\n\nThe Key field indicates whether the column is indexed:\n\no If Key is empty, the column either is not indexed or is indexed only\n as a secondary column in a multiple-column, nonunique index.\n\no If Key is PRI, the column is a PRIMARY KEY or is one of the columns\n in a multiple-column PRIMARY KEY.\n\no If Key is UNI, the column is the first column of a UNIQUE index. (A\n UNIQUE index allows multiple NULL values, but you can tell whether\n the column allows NULL by checking the Null field.)\n\no If Key is MUL, the column is the first column of a nonunique index in\n which multiple occurrences of a given value are allowed within the\n column.\n\nIf more than one of the Key values applies to a given column of a\ntable, Key displays the one with the highest priority, in the order\nPRI, UNI, MUL.\n\nA UNIQUE index may be displayed as PRI if it cannot contain NULL values\nand there is no PRIMARY KEY in the table. A UNIQUE index may display as\nMUL if several columns form a composite UNIQUE index; although the\ncombination of the columns is unique, each column can still hold\nmultiple occurrences of a given value.\n\nThe Default field indicates the default value that is assigned to the\ncolumn.\n\nThe Extra field contains any additional information that is available\nabout a given column. The value is nonempty in these cases:\nauto_increment for columns that have the AUTO_INCREMENT attribute; as\nof MySQL 5.1.23, on update CURRENT_TIMESTAMP for TIMESTAMP columns that\nhave the ON UPDATE CURRENT_TIMESTAMP attribute.\n\nPrivileges indicates the privileges you have for the column. This value\nis displayed only if you use the FULL keyword.\n\nComment indicates any comment the column has. This value is displayed\nonly if you use the FULL keyword.\n\nSHOW FIELDS is a synonym for SHOW COLUMNS. You can also list a table\'s\ncolumns with the mysqlshow db_name tbl_name command.\n\nThe DESCRIBE statement provides information similar to SHOW COLUMNS.\nSee [HELP DESCRIBE].\n\nThe SHOW CREATE TABLE, SHOW TABLE STATUS, and SHOW INDEX statements\nalso provide information about tables. See [HELP SHOW].\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-columns.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/show-columns.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (22,37,'CREATE TRIGGER','Syntax:\nCREATE\n [DEFINER = { user | CURRENT_USER }]\n TRIGGER trigger_name trigger_time trigger_event\n ON tbl_name FOR EACH ROW trigger_stmt\n\nThis statement creates a new trigger. A trigger is a named database\nobject that is associated with a table, and that activates when a\nparticular event occurs for the table. The trigger becomes associated\nwith the table named tbl_name, which must refer to a permanent table.\nYou cannot associate a trigger with a TEMPORARY table or a view.\n\nCREATE TRIGGER requires the TRIGGER privilege for the table associated\nwith the trigger. If binary logging is enabled, the CREATE TRIGGER\nstatement might also require the SUPER privilege, as described in\nhttp://dev.mysql.com/doc/refman/5.1/en/stored-programs-logging.html.\nSUPER may also be required depending on the DEFINER value, as described\nlater. (Before MySQL 5.1.6, there is no TRIGGER privilege and this\nstatement requires the SUPER privilege in all cases.)\n\nThe DEFINER clause determines the security context to be used when\nchecking access privileges at trigger activation time.\n\ntrigger_time is the trigger action time. It can be BEFORE or AFTER to\nindicate that the trigger activates before or after each row to be\nmodified.\n\ntrigger_event indicates the kind of statement that activates the\ntrigger. The trigger_event can be one of the following:\n\no INSERT: The trigger is activated whenever a new row is inserted into\n the table; for example, through INSERT, LOAD DATA, and REPLACE\n statements.\n\no UPDATE: The trigger is activated whenever a row is modified; for\n example, through UPDATE statements.\n\no DELETE: The trigger is activated whenever a row is deleted from the\n table; for example, through DELETE and REPLACE statements. However,\n DROP TABLE and TRUNCATE TABLE statements on the table do not activate\n this trigger, because they do not use DELETE. Dropping a partition\n does not activate DELETE triggers, either. See [HELP TRUNCATE TABLE].\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/create-trigger.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/create-trigger.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (23,30,'MONTH','Syntax:\nMONTH(date)\n\nReturns the month for date, in the range 1 to 12 for January to\nDecember, or 0 for dates such as \'0000-00-00\' or \'2008-00-00\' that have\na zero month part.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT MONTH(\'2008-02-03\');\n -> 2\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (24,20,'TINYINT','TINYINT[(M)] [UNSIGNED] [ZEROFILL]\n\nA very small integer. The signed range is -128 to 127. The unsigned\nrange is 0 to 255.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/numeric-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/numeric-type-overview.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (25,25,'SHOW TRIGGERS','Syntax:\nSHOW TRIGGERS [{FROM | IN} db_name]\n [LIKE \'pattern\' | WHERE expr]\n\nSHOW TRIGGERS lists the triggers currently defined for tables in a\ndatabase (the default database unless a FROM clause is given). This\nstatement requires the TRIGGER privilege (prior to MySQL 5.1.22, it\nrequires the SUPER privilege). The LIKE clause, if present, indicates\nwhich table names to match and causes the statement to display triggers\nfor those tables. The WHERE clause can be given to select rows using\nmore general conditions, as discussed in\nhttp://dev.mysql.com/doc/refman/5.1/en/extended-show.html.\n\nFor the trigger ins_sum as defined in\nhttp://dev.mysql.com/doc/refman/5.1/en/triggers.html, the output of\nthis statement is as shown here:\n\nmysql> SHOW TRIGGERS LIKE \'acc%\'\\G\n*************************** 1. row ***************************\n Trigger: ins_sum\n Event: INSERT\n Table: account\n Statement: SET @sum = @sum + NEW.amount\n Timing: BEFORE\n Created: NULL\n sql_mode:\n Definer: myname@localhost\ncharacter_set_client: latin1\ncollation_connection: latin1_swedish_ci\n Database Collation: latin1_swedish_ci\n\ncharacter_set_client is the session value of the character_set_client\nsystem variable when the trigger was created. collation_connection is\nthe session value of the collation_connection system variable when the\ntrigger was created. Database Collation is the collation of the\ndatabase with which the trigger is associated. These columns were added\nin MySQL 5.1.21.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-triggers.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/show-triggers.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (26,14,'MASTER_POS_WAIT','Syntax:\nMASTER_POS_WAIT(log_name,log_pos[,timeout])\n\nThis function is useful for control of master/slave synchronization. It\nblocks until the slave has read and applied all updates up to the\nspecified position in the master log. The return value is the number of\nlog events the slave had to wait for to advance to the specified\nposition. The function returns NULL if the slave SQL thread is not\nstarted, the slave\'s master information is not initialized, the\narguments are incorrect, or an error occurs. It returns -1 if the\ntimeout has been exceeded. If the slave SQL thread stops while\nMASTER_POS_WAIT() is waiting, the function returns NULL. If the slave\nis past the specified position, the function returns immediately.\n\nIf a timeout value is specified, MASTER_POS_WAIT() stops waiting when\ntimeout seconds have elapsed. timeout must be greater than 0; a zero or\nnegative timeout means no timeout.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/miscellaneous-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/miscellaneous-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (27,35,'REGEXP','Syntax:\nexpr REGEXP pat, expr RLIKE pat\n\nPerforms a pattern match of a string expression expr against a pattern\npat. The pattern can be an extended regular expression. The syntax for\nregular expressions is discussed in\nhttp://dev.mysql.com/doc/refman/5.1/en/regexp.html. Returns 1 if expr\nmatches pat; otherwise it returns 0. If either expr or pat is NULL, the\nresult is NULL. RLIKE is a synonym for REGEXP, provided for mSQL\ncompatibility.\n\nThe pattern need not be a literal string. For example, it can be\nspecified as a string expression or table column.\n\n*Note*: Because MySQL uses the C escape syntax in strings (for example,\n"\\n" to represent the newline character), you must double any "\\" that\nyou use in your REGEXP strings.\n\nREGEXP is not case sensitive, except when used with binary strings.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/regexp.html\n\n','mysql> SELECT \'Monty!\' REGEXP \'.*\';\n -> 1\nmysql> SELECT \'new*\\n*line\' REGEXP \'new\\\\*.\\\\*line\';\n -> 1\nmysql> SELECT \'a\' REGEXP \'A\', \'a\' REGEXP BINARY \'A\';\n -> 1 0\nmysql> SELECT \'a\' REGEXP \'^[a-d]\';\n -> 1\n','http://dev.mysql.com/doc/refman/5.1/en/regexp.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (28,22,'IF STATEMENT','Syntax:\nIF search_condition THEN statement_list\n [ELSEIF search_condition THEN statement_list] ...\n [ELSE statement_list]\nEND IF\n\nIF implements a basic conditional construct. If the search_condition\nevaluates to true, the corresponding SQL statement list is executed. If\nno search_condition matches, the statement list in the ELSE clause is\nexecuted. Each statement_list consists of one or more statements.\n\n*Note*: There is also an IF() function, which differs from the IF\nstatement described here. See\nhttp://dev.mysql.com/doc/refman/5.1/en/control-flow-functions.html.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/if-statement.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/if-statement.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (29,18,'^','Syntax:\n^\n\nBitwise XOR:\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/bit-functions.html\n\n','mysql> SELECT 1 ^ 1;\n -> 0\nmysql> SELECT 1 ^ 0;\n -> 1\nmysql> SELECT 11 ^ 3;\n -> 8\n','http://dev.mysql.com/doc/refman/5.1/en/bit-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (30,37,'DROP VIEW','Syntax:\nDROP VIEW [IF EXISTS]\n view_name [, view_name] ...\n [RESTRICT | CASCADE]\n\nDROP VIEW removes one or more views. You must have the DROP privilege\nfor each view. If any of the views named in the argument list do not\nexist, MySQL returns an error indicating by name which nonexisting\nviews it was unable to drop, but it also drops all of the views in the\nlist that do exist.\n\nThe IF EXISTS clause prevents an error from occurring for views that\ndon\'t exist. When this clause is given, a NOTE is generated for each\nnonexistent view. See [HELP SHOW WARNINGS].\n\nRESTRICT and CASCADE, if given, are parsed and ignored.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/drop-view.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/drop-view.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (31,29,'WITHIN','Within(g1,g2)\n\nReturns 1 or 0 to indicate whether g1 is spatially within g2. This\ntests the opposite relationship as Contains().\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/functions-that-test-spatial-relationships-between-geometries.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/functions-that-test-spatial-relationships-between-geometries.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (32,30,'WEEK','Syntax:\nWEEK(date[,mode])\n\nThis function returns the week number for date. The two-argument form\nof WEEK() allows you to specify whether the week starts on Sunday or\nMonday and whether the return value should be in the range from 0 to 53\nor from 1 to 53. If the mode argument is omitted, the value of the\ndefault_week_format system variable is used. See\nhttp://dev.mysql.com/doc/refman/5.1/en/server-system-variables.html.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT WEEK(\'2008-02-20\');\n -> 7\nmysql> SELECT WEEK(\'2008-02-20\',0);\n -> 7\nmysql> SELECT WEEK(\'2008-02-20\',1);\n -> 8\nmysql> SELECT WEEK(\'2008-12-31\',1);\n -> 53\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (33,25,'SHOW PLUGINS','Syntax:\nSHOW PLUGINS\n\nSHOW PLUGINS displays information about server plugins.\n\nmysql> SHOW PLUGINS\\G\n*************************** 1. row ***************************\n Name: binlog\n Status: ACTIVE\n Type: STORAGE ENGINE\nLibrary: NULL\nLicense: GPL\n*************************** 2. row ***************************\n Name: CSV\n Status: ACTIVE\n Type: STORAGE ENGINE\nLibrary: NULL\nLicense: GPL\n*************************** 3. row ***************************\n Name: MEMORY\n Status: ACTIVE\n Type: STORAGE ENGINE\nLibrary: NULL\nLicense: GPL\n*************************** 4. row ***************************\n Name: MyISAM\n Status: ACTIVE\n Type: STORAGE ENGINE\nLibrary: NULL\nLicense: GPL\n...\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-plugins.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/show-plugins.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (34,21,'DROP FUNCTION UDF','Syntax:\nDROP FUNCTION function_name\n\nThis statement drops the user-defined function (UDF) named\nfunction_name.\n\nTo drop a function, you must have the DELETE privilege for the mysql\ndatabase. This is because DROP FUNCTION removes a row from the\nmysql.func system table that records the function\'s name, type, and\nshared library name.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/drop-function-udf.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/drop-function-udf.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (35,25,'PREPARE','Syntax:\nPREPARE stmt_name FROM preparable_stmt\n\nThe PREPARE statement prepares a statement and assigns it a name,\nstmt_name, by which to refer to the statement later. Statement names\nare not case sensitive. preparable_stmt is either a string literal or a\nuser variable that contains the text of the statement. The text must\nrepresent a single SQL statement, not multiple statements. Within the\nstatement, "?" characters can be used as parameter markers to indicate\nwhere data values are to be bound to the query later when you execute\nit. The "?" characters should not be enclosed within quotes, even if\nyou intend to bind them to string values. Parameter markers can be used\nonly where data values should appear, not for SQL keywords,\nidentifiers, and so forth.\n\nIf a prepared statement with the given name already exists, it is\ndeallocated implicitly before the new statement is prepared. This means\nthat if the new statement contains an error and cannot be prepared, an\nerror is returned and no statement with the given name exists.\n\nA prepared statement is executed with EXECUTE and released with\nDEALLOCATE PREPARE.\n\nThe scope of a prepared statement is the session within which it is\ncreated. Other sessions cannot see it.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/prepare.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/prepare.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (36,8,'LOCK','Syntax:\nLOCK TABLES\n tbl_name [[AS] alias] lock_type\n [, tbl_name [[AS] alias] lock_type] ...\n\nlock_type:\n READ [LOCAL]\n | [LOW_PRIORITY] WRITE\n\nUNLOCK TABLES\n\nMySQL enables client sessions to acquire table locks explicitly for the\npurpose of cooperating with other sessions for access to tables, or to\nprevent other sessions from modifying tables during periods when a\nsession requires exclusive access to them. A session can acquire or\nrelease locks only for itself. One session cannot acquire locks for\nanother session or release locks held by another session.\n\nLocks may be used to emulate transactions or to get more speed when\nupdating tables. This is explained in more detail later in this\nsection.\n\nLOCK TABLES explicitly acquires table locks for the current client\nsession. Table locks can be acquired for base tables or views. You must\nhave the LOCK TABLES privilege, and the SELECT privilege for each\nobject to be locked.\n\nFor view locking, LOCK TABLES adds all base tables used in the view to\nthe set of tables to be locked and locks them automatically. If you\nlock a table explicitly with LOCK TABLES, any tables used in triggers\nare also locked implicitly, as described in\nhttp://dev.mysql.com/doc/refman/5.1/en/lock-tables-and-triggers.html.\n\nUNLOCK TABLES explicitly releases any table locks held by the current\nsession.\n\nAnother use for UNLOCK TABLES is to release the global read lock\nacquired with the FLUSH TABLES WITH READ LOCK statement, which enables\nyou to lock all tables in all databases. See [HELP FLUSH]. (This is a\nvery convenient way to get backups if you have a file system such as\nVeritas that can take snapshots in time.)\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/lock-tables.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/lock-tables.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (37,35,'UPDATEXML','Syntax:\nUpdateXML(xml_target, xpath_expr, new_xml)\n\nThis function replaces a single portion of a given fragment of XML\nmarkup xml_target with a new XML fragment new_xml, and then returns the\nchanged XML. The portion of xml_target that is replaced matches an\nXPath expression xpath_expr supplied by the user. If no expression\nmatching xpath_expr is found, or if multiple matches are found, the\nfunction returns the original xml_target XML fragment. All three\narguments should be strings.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/xml-functions.html\n\n','mysql> SELECT\n -> UpdateXML(\'ccc\', \'/a\', \'fff\') AS val1,\n -> UpdateXML(\'ccc\', \'/b\', \'fff\') AS val2,\n -> UpdateXML(\'ccc\', \'//b\', \'fff\') AS val3,\n -> UpdateXML(\'ccc\', \'/a/d\', \'fff\') AS val4,\n -> UpdateXML(\'ccc\', \'/a/d\', \'fff\') AS val5\n -> \\G\n\n*************************** 1. row ***************************\nval1: fff\nval2: ccc\nval3: fff\nval4: cccfff\nval5: ccc\n','http://dev.mysql.com/doc/refman/5.1/en/xml-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (38,25,'RESET SLAVE','Syntax:\nRESET SLAVE\n\nRESET SLAVE makes the slave forget its replication position in the\nmaster\'s binary log. This statement is meant to be used for a clean\nstart: It deletes the master.info and relay-log.info files, all the\nrelay log files, and starts a new relay log file. To use RESET SLAVE,\nthe slave replication threads must be stopped (use STOP SLAVE if\nnecessary).\n\n*Note*: All relay log files are deleted, even if they have not been\ncompletely executed by the slave SQL thread. (This is a condition\nlikely to exist on a replication slave if you have issued a STOP SLAVE\nstatement or if the slave is highly loaded.)\n\nConnection information stored in the master.info file is immediately\nreset using any values specified in the corresponding startup options.\nThis information includes values such as master host, master port,\nmaster user, and master password. If the slave SQL thread was in the\nmiddle of replicating temporary tables when it was stopped, and RESET\nSLAVE is issued, these replicated temporary tables are deleted on the\nslave.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/reset-slave.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/reset-slave.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (39,25,'SHOW BINARY LOGS','Syntax:\nSHOW BINARY LOGS\nSHOW MASTER LOGS\n\nLists the binary log files on the server. This statement is used as\npart of the procedure described in [HELP PURGE BINARY LOGS], that shows\nhow to determine which logs can be purged.\n\nmysql> SHOW BINARY LOGS;\n+---------------+-----------+\n| Log_name | File_size |\n+---------------+-----------+\n| binlog.000015 | 724935 |\n| binlog.000016 | 733481 |\n+---------------+-----------+\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-binary-logs.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/show-binary-logs.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (40,23,'POLYGON','Polygon(ls1,ls2,...)\n\nConstructs a Polygon value from a number of LineString or WKB\nLineString arguments. If any argument does not represent a LinearRing\n(that is, not a closed and simple LineString), the return value is\nNULL.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-mysql-specific-functions\n\n','','http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-mysql-specific-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (41,30,'MINUTE','Syntax:\nMINUTE(time)\n\nReturns the minute for time, in the range 0 to 59.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT MINUTE(\'2008-02-03 10:05:03\');\n -> 5\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (42,30,'DAY','Syntax:\nDAY(date)\n\nDAY() is a synonym for DAYOFMONTH().\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (43,35,'MID','Syntax:\nMID(str,pos,len)\n\nMID(str,pos,len) is a synonym for SUBSTRING(str,pos,len).\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (44,14,'UUID','Syntax:\nUUID()\n\nReturns a Universal Unique Identifier (UUID) generated according to\n"DCE 1.1: Remote Procedure Call" (Appendix A) CAE (Common Applications\nEnvironment) Specifications published by The Open Group in October 1997\n(Document Number C706,\nhttp://www.opengroup.org/public/pubs/catalog/c706.htm).\n\nA UUID is designed as a number that is globally unique in space and\ntime. Two calls to UUID() are expected to generate two different\nvalues, even if these calls are performed on two separate computers\nthat are not connected to each other.\n\nA UUID is a 128-bit number represented by a utf8 string of five\nhexadecimal numbers in aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee format:\n\no The first three numbers are generated from a timestamp.\n\no The fourth number preserves temporal uniqueness in case the timestamp\n value loses monotonicity (for example, due to daylight saving time).\n\no The fifth number is an IEEE 802 node number that provides spatial\n uniqueness. A random number is substituted if the latter is not\n available (for example, because the host computer has no Ethernet\n card, or we do not know how to find the hardware address of an\n interface on your operating system). In this case, spatial uniqueness\n cannot be guaranteed. Nevertheless, a collision should have very low\n probability.\n\n Currently, the MAC address of an interface is taken into account only\n on FreeBSD and Linux. On other operating systems, MySQL uses a\n randomly generated 48-bit number.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/miscellaneous-functions.html\n\n','mysql> SELECT UUID();\n -> \'6ccd780c-baba-1026-9564-0040f4311e29\'\n','http://dev.mysql.com/doc/refman/5.1/en/miscellaneous-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (45,23,'LINESTRING','LineString(pt1,pt2,...)\n\nConstructs a LineString value from a number of Point or WKB Point\narguments. If the number of arguments is less than two, the return\nvalue is NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-mysql-specific-functions\n\n','','http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-mysql-specific-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (46,14,'SLEEP','Syntax:\nSLEEP(duration)\n\nSleeps (pauses) for the number of seconds given by the duration\nargument, then returns 0. If SLEEP() is interrupted, it returns 1. The\nduration may have a fractional part given in microseconds.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/miscellaneous-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/miscellaneous-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (47,15,'CONNECTION_ID','Syntax:\nCONNECTION_ID()\n\nReturns the connection ID (thread ID) for the connection. Every\nconnection has an ID that is unique among the set of currently\nconnected clients.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/information-functions.html\n\n','mysql> SELECT CONNECTION_ID();\n -> 23786\n','http://dev.mysql.com/doc/refman/5.1/en/information-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (48,26,'DELETE','Syntax:\nSingle-table syntax:\n\nDELETE [LOW_PRIORITY] [QUICK] [IGNORE] FROM tbl_name\n [WHERE where_condition]\n [ORDER BY ...]\n [LIMIT row_count]\n\nMultiple-table syntax:\n\nDELETE [LOW_PRIORITY] [QUICK] [IGNORE]\n tbl_name[.*] [, tbl_name[.*]] ...\n FROM table_references\n [WHERE where_condition]\n\nOr:\n\nDELETE [LOW_PRIORITY] [QUICK] [IGNORE]\n FROM tbl_name[.*] [, tbl_name[.*]] ...\n USING table_references\n [WHERE where_condition]\n\nFor the single-table syntax, the DELETE statement deletes rows from\ntbl_name and returns a count of the number of deleted rows. This count\ncan be obtained by calling the ROW_COUNT() function (see\nhttp://dev.mysql.com/doc/refman/5.1/en/information-functions.html). The\nWHERE clause, if given, specifies the conditions that identify which\nrows to delete. With no WHERE clause, all rows are deleted. If the\nORDER BY clause is specified, the rows are deleted in the order that is\nspecified. The LIMIT clause places a limit on the number of rows that\ncan be deleted.\n\nFor the multiple-table syntax, DELETE deletes from each tbl_name the\nrows that satisfy the conditions. In this case, ORDER BY and LIMIT\ncannot be used.\n\nwhere_condition is an expression that evaluates to true for each row to\nbe deleted. It is specified as described in\nhttp://dev.mysql.com/doc/refman/5.1/en/select.html.\n\nCurrently, you cannot delete from a table and select from the same\ntable in a subquery.\n\nYou need the DELETE privilege on a table to delete rows from it. You\nneed only the SELECT privilege for any columns that are only read, such\nas those named in the WHERE clause.\n\nAs stated, a DELETE statement with no WHERE clause deletes all rows. A\nfaster way to do this, when you do not need to know the number of\ndeleted rows, is to use TRUNCATE TABLE. However, within a transaction\nor if you have a lock on the table, TRUNCATE TABLE cannot be used\nwhereas DELETE can. See [HELP TRUNCATE TABLE], and [HELP LOCK].\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/delete.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/delete.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (49,4,'ROUND','Syntax:\nROUND(X), ROUND(X,D)\n\nRounds the argument X to D decimal places. The rounding algorithm\ndepends on the data type of X. D defaults to 0 if not specified. D can\nbe negative to cause D digits left of the decimal point of the value X\nto become zero.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html\n\n','mysql> SELECT ROUND(-1.23);\n -> -1\nmysql> SELECT ROUND(-1.58);\n -> -2\nmysql> SELECT ROUND(1.58);\n -> 2\nmysql> SELECT ROUND(1.298, 1);\n -> 1.3\nmysql> SELECT ROUND(1.298, 0);\n -> 1\nmysql> SELECT ROUND(23.298, -1);\n -> 20\n','http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (50,7,'NULLIF','Syntax:\nNULLIF(expr1,expr2)\n\nReturns NULL if expr1 = expr2 is true, otherwise returns expr1. This is\nthe same as CASE WHEN expr1 = expr2 THEN NULL ELSE expr1 END.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/control-flow-functions.html\n\n','mysql> SELECT NULLIF(1,1);\n -> NULL\nmysql> SELECT NULLIF(1,2);\n -> 1\n','http://dev.mysql.com/doc/refman/5.1/en/control-flow-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (51,22,'CLOSE','Syntax:\nCLOSE cursor_name\n\nThis statement closes a previously opened cursor.\n\nIf not closed explicitly, a cursor is closed at the end of the compound\nstatement in which it was declared.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/close.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/close.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (52,25,'STOP SLAVE','Syntax:\nSTOP SLAVE [thread_type [, thread_type] ... ]\n\nthread_type: IO_THREAD | SQL_THREAD\n\nStops the slave threads. STOP SLAVE requires the SUPER privilege.\n\nLike START SLAVE, this statement may be used with the IO_THREAD and\nSQL_THREAD options to name the thread or threads to be stopped.\n\n*Note*: The transactional behavior of STOP SLAVE changed in MySQL\n5.1.35. Previously, it took effect immediately. Beginning with MySQL\n5.1.35, it waits until any current replication event group affecting\none or more non-transactional tables has finished executing (if there\nis any such replication group), or until the user issues a KILL QUERY\nor KILL CONNECTION statement. (Bug#319\n(http://bugs.mysql.com/bug.php?id=319), Bug#38205\n(http://bugs.mysql.com/bug.php?id=38205))\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/stop-slave.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/stop-slave.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (53,30,'TIMEDIFF','Syntax:\nTIMEDIFF(expr1,expr2)\n\nTIMEDIFF() returns expr1 - expr2 expressed as a time value. expr1 and\nexpr2 are time or date-and-time expressions, but both must be of the\nsame type.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT TIMEDIFF(\'2000:01:01 00:00:00\',\n -> \'2000:01:01 00:00:00.000001\');\n -> \'-00:00:00.000001\'\nmysql> SELECT TIMEDIFF(\'2008-12-31 23:59:59.000001\',\n -> \'2008-12-30 01:01:01.000002\');\n -> \'46:58:57.999999\'\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (54,35,'REPLACE FUNCTION','Syntax:\nREPLACE(str,from_str,to_str)\n\nReturns the string str with all occurrences of the string from_str\nreplaced by the string to_str. REPLACE() performs a case-sensitive\nmatch when searching for from_str.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','mysql> SELECT REPLACE(\'www.mysql.com\', \'w\', \'Ww\');\n -> \'WwWwWw.mysql.com\'\n','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (55,27,'USE','Syntax:\nUSE db_name\n\nThe USE db_name statement tells MySQL to use the db_name database as\nthe default (current) database for subsequent statements. The database\nremains the default until the end of the session or another USE\nstatement is issued:\n\nUSE db1;\nSELECT COUNT(*) FROM mytable; # selects from db1.mytable\nUSE db2;\nSELECT COUNT(*) FROM mytable; # selects from db2.mytable\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/use.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/use.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (56,3,'LINEFROMTEXT','LineFromText(wkt[,srid]), LineStringFromText(wkt[,srid])\n\nConstructs a LINESTRING value using its WKT representation and SRID.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-wkt-functions\n\n','','http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-wkt-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (57,7,'CASE OPERATOR','Syntax:\nCASE value WHEN [compare_value] THEN result [WHEN [compare_value] THEN\nresult ...] [ELSE result] END\n\nCASE WHEN [condition] THEN result [WHEN [condition] THEN result ...]\n[ELSE result] END\n\nThe first version returns the result where value=compare_value. The\nsecond version returns the result for the first condition that is true.\nIf there was no matching result value, the result after ELSE is\nreturned, or NULL if there is no ELSE part.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/control-flow-functions.html\n\n','mysql> SELECT CASE 1 WHEN 1 THEN \'one\'\n -> WHEN 2 THEN \'two\' ELSE \'more\' END;\n -> \'one\'\nmysql> SELECT CASE WHEN 1>0 THEN \'true\' ELSE \'false\' END;\n -> \'true\'\nmysql> SELECT CASE BINARY \'B\'\n -> WHEN \'a\' THEN 1 WHEN \'b\' THEN 2 END;\n -> NULL\n','http://dev.mysql.com/doc/refman/5.1/en/control-flow-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (58,25,'SHOW MASTER STATUS','Syntax:\nSHOW MASTER STATUS\n\nThis statement provides status information about the binary log files\nof the master. It requires either the SUPER or REPLICATION CLIENT\nprivilege.\n\nExample:\n\nmysql> SHOW MASTER STATUS;\n+---------------+----------+--------------+------------------+\n| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |\n+---------------+----------+--------------+------------------+\n| mysql-bin.003 | 73 | test | manual,mysql |\n+---------------+----------+--------------+------------------+\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-master-status.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/show-master-status.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (59,30,'ADDTIME','Syntax:\nADDTIME(expr1,expr2)\n\nADDTIME() adds expr2 to expr1 and returns the result. expr1 is a time\nor datetime expression, and expr2 is a time expression.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT ADDTIME(\'2007-12-31 23:59:59.999999\', \'1 1:1:1.000002\');\n -> \'2008-01-02 01:01:01.000001\'\nmysql> SELECT ADDTIME(\'01:00:00.999999\', \'02:00:00.999998\');\n -> \'03:00:01.999997\'\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (60,32,'SPATIAL','MySQL can create spatial indexes using syntax similar to that for\ncreating regular indexes, but extended with the SPATIAL keyword.\nCurrently, columns in spatial indexes must be declared NOT NULL. The\nfollowing examples demonstrate how to create spatial indexes:\n\no With CREATE TABLE:\n\nCREATE TABLE geom (g GEOMETRY NOT NULL, SPATIAL INDEX(g));\n\no With ALTER TABLE:\n\nALTER TABLE geom ADD SPATIAL INDEX(g);\n\no With CREATE INDEX:\n\nCREATE SPATIAL INDEX sp_index ON geom (g);\n\nFor MyISAM tables, SPATIAL INDEX creates an R-tree index. For storage\nengines that support nonspatial indexing of spatial columns, the engine\ncreates a B-tree index. A B-tree index on spatial values will be useful\nfor exact-value lookups, but not for range scans.\n\nFor more information on indexing spatial columns, see [HELP CREATE\nINDEX].\n\nTo drop spatial indexes, use ALTER TABLE or DROP INDEX:\n\no With ALTER TABLE:\n\nALTER TABLE geom DROP INDEX g;\n\no With DROP INDEX:\n\nDROP INDEX sp_index ON geom;\n\nExample: Suppose that a table geom contains more than 32,000\ngeometries, which are stored in the column g of type GEOMETRY. The\ntable also has an AUTO_INCREMENT column fid for storing object ID\nvalues.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-indexes.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-indexes.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (61,30,'TIMESTAMPDIFF','Syntax:\nTIMESTAMPDIFF(unit,datetime_expr1,datetime_expr2)\n\nReturns datetime_expr2 - datetime_expr1, where datetime_expr1 and\ndatetime_expr2 are date or datetime expressions. One expression may be\na date and the other a datetime; a date value is treated as a datetime\nhaving the time part \'00:00:00\' where necessary. The unit for the\nresult (an integer) is given by the unit argument. The legal values for\nunit are the same as those listed in the description of the\nTIMESTAMPADD() function.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT TIMESTAMPDIFF(MONTH,\'2003-02-01\',\'2003-05-01\');\n -> 3\nmysql> SELECT TIMESTAMPDIFF(YEAR,\'2002-05-01\',\'2001-01-01\');\n -> -1\nmysql> SELECT TIMESTAMPDIFF(MINUTE,\'2003-02-01\',\'2003-05-01 12:05:55\');\n -> 128885\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (62,35,'UPPER','Syntax:\nUPPER(str)\n\nReturns the string str with all characters changed to uppercase\naccording to the current character set mapping. The default is latin1\n(cp1252 West European).\n\nmysql> SELECT UPPER(\'Hej\');\n -> \'HEJ\'\n\nUPPER() is ineffective when applied to binary strings (BINARY,\nVARBINARY, BLOB). The description of LOWER() shows how to perform\nlettercase conversion of binary strings.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (63,30,'FROM_UNIXTIME','Syntax:\nFROM_UNIXTIME(unix_timestamp), FROM_UNIXTIME(unix_timestamp,format)\n\nReturns a representation of the unix_timestamp argument as a value in\n\'YYYY-MM-DD HH:MM:SS\' or YYYYMMDDHHMMSS.uuuuuu format, depending on\nwhether the function is used in a string or numeric context. The value\nis expressed in the current time zone. unix_timestamp is an internal\ntimestamp value such as is produced by the UNIX_TIMESTAMP() function.\n\nIf format is given, the result is formatted according to the format\nstring, which is used the same way as listed in the entry for the\nDATE_FORMAT() function.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT FROM_UNIXTIME(1196440219);\n -> \'2007-11-30 10:30:19\'\nmysql> SELECT FROM_UNIXTIME(1196440219) + 0;\n -> 20071130103019.000000\nmysql> SELECT FROM_UNIXTIME(UNIX_TIMESTAMP(),\n -> \'%Y %D %M %h:%i:%s %x\');\n -> \'2007 30th November 10:30:59 2007\'\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (64,20,'MEDIUMBLOB','MEDIUMBLOB\n\nA BLOB column with a maximum length of 16,777,215 (224 - 1) bytes. Each\nMEDIUMBLOB value is stored using a three-byte length prefix that\nindicates the number of bytes in the value.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/string-type-overview.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (65,7,'IFNULL','Syntax:\nIFNULL(expr1,expr2)\n\nIf expr1 is not NULL, IFNULL() returns expr1; otherwise it returns\nexpr2. IFNULL() returns a numeric or string value, depending on the\ncontext in which it is used.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/control-flow-functions.html\n\n','mysql> SELECT IFNULL(1,0);\n -> 1\nmysql> SELECT IFNULL(NULL,10);\n -> 10\nmysql> SELECT IFNULL(1/0,10);\n -> 10\nmysql> SELECT IFNULL(1/0,\'yes\');\n -> \'yes\'\n','http://dev.mysql.com/doc/refman/5.1/en/control-flow-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (66,25,'SHOW FUNCTION CODE','Syntax:\nSHOW FUNCTION CODE func_name\n\nThis statement is similar to SHOW PROCEDURE CODE but for stored\nfunctions. See [HELP SHOW PROCEDURE CODE].\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-function-code.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/show-function-code.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (67,25,'SHOW ERRORS','Syntax:\nSHOW ERRORS [LIMIT [offset,] row_count]\nSHOW COUNT(*) ERRORS\n\nThis statement is similar to SHOW WARNINGS, except that instead of\ndisplaying errors, warnings, and notes, it displays only errors.\n\nThe LIMIT clause has the same syntax as for the SELECT statement. See\nhttp://dev.mysql.com/doc/refman/5.1/en/select.html.\n\nThe SHOW COUNT(*) ERRORS statement displays the number of errors. You\ncan also retrieve this number from the error_count variable:\n\nSHOW COUNT(*) ERRORS;\nSELECT @@error_count;\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-errors.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/show-errors.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (68,17,'LEAST','Syntax:\nLEAST(value1,value2,...)\n\nWith two or more arguments, returns the smallest (minimum-valued)\nargument. The arguments are compared using the following rules:\n\no If the return value is used in an INTEGER context or all arguments\n are integer-valued, they are compared as integers.\n\no If the return value is used in a REAL context or all arguments are\n real-valued, they are compared as reals.\n\no If any argument is a case-sensitive string, the arguments are\n compared as case-sensitive strings.\n\no In all other cases, the arguments are compared as case-insensitive\n strings.\n\nLEAST() returns NULL if any argument is NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html\n\n','mysql> SELECT LEAST(2,0);\n -> 0\nmysql> SELECT LEAST(34.0,3.0,5.0,767.0);\n -> 3.0\nmysql> SELECT LEAST(\'B\',\'A\',\'C\');\n -> \'A\'\n','http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (69,17,'=','=\n\nEqual:\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html\n\n','mysql> SELECT 1 = 0;\n -> 0\nmysql> SELECT \'0\' = 0;\n -> 1\nmysql> SELECT \'0.0\' = 0;\n -> 1\nmysql> SELECT \'0.01\' = 0;\n -> 0\nmysql> SELECT \'.01\' = 0.01;\n -> 1\n','http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (70,35,'REVERSE','Syntax:\nREVERSE(str)\n\nReturns the string str with the order of the characters reversed.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','mysql> SELECT REVERSE(\'abc\');\n -> \'cba\'\n','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (71,17,'ISNULL','Syntax:\nISNULL(expr)\n\nIf expr is NULL, ISNULL() returns 1, otherwise it returns 0.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html\n\n','mysql> SELECT ISNULL(1+1);\n -> 0\nmysql> SELECT ISNULL(1/0);\n -> 1\n','http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (72,20,'BINARY','BINARY(M)\n\nThe BINARY type is similar to the CHAR type, but stores binary byte\nstrings rather than nonbinary character strings. M represents the\ncolumn length in bytes.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/string-type-overview.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (73,20,'BLOB DATA TYPE','A BLOB is a binary large object that can hold a variable amount of\ndata. The four BLOB types are TINYBLOB, BLOB, MEDIUMBLOB, and LONGBLOB.\nThese differ only in the maximum length of the values they can hold.\nThe four TEXT types are TINYTEXT, TEXT, MEDIUMTEXT, and LONGTEXT. These\ncorrespond to the four BLOB types and have the same maximum lengths and\nstorage requirements. See\nhttp://dev.mysql.com/doc/refman/5.1/en/storage-requirements.html.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/blob.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/blob.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (74,34,'BOUNDARY','Boundary(g)\n\nReturns a geometry that is the closure of the combinatorial boundary of\nthe geometry value g.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#general-geometry-property-functions\n\n','','http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#general-geometry-property-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (75,9,'CREATE USER','Syntax:\nCREATE USER user [IDENTIFIED BY [PASSWORD] \'password\']\n [, user [IDENTIFIED BY [PASSWORD] \'password\']] ...\n\nThe CREATE USER statement creates new MySQL accounts. To use it, you\nmust have the global CREATE USER privilege or the INSERT privilege for\nthe mysql database. For each account, CREATE USER creates a new row in\nthe mysql.user table that has no privileges. An error occurs if the\naccount already exists. Each account is named using the same format as\nfor the GRANT statement; for example, \'jeffrey\'@\'localhost\'. If you\nspecify only the user name part of the account name, a host name part\nof \'%\' is used. For additional information about specifying account\nnames, see [HELP GRANT].\n\nThe account can be given a password with the optional IDENTIFIED BY\nclause. The user value and the password are given the same way as for\nthe GRANT statement. In particular, to specify the password in plain\ntext, omit the PASSWORD keyword. To specify the password as the hashed\nvalue as returned by the PASSWORD() function, include the PASSWORD\nkeyword. See [HELP GRANT].\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/create-user.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/create-user.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (76,23,'POINT','Point(x,y)\n\nConstructs a Point using its coordinates.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-mysql-specific-functions\n\n','','http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-mysql-specific-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (77,15,'CURRENT_USER','Syntax:\nCURRENT_USER, CURRENT_USER()\n\nReturns the user name and host name combination for the MySQL account\nthat the server used to authenticate the current client. This account\ndetermines your access privileges. The return value is a string in the\nutf8 character set.\n\nThe value of CURRENT_USER() can differ from the value of USER().\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/information-functions.html\n\n','mysql> SELECT USER();\n -> \'davida@localhost\'\nmysql> SELECT * FROM mysql.user;\nERROR 1044: Access denied for user \'\'@\'localhost\' to\ndatabase \'mysql\'\nmysql> SELECT CURRENT_USER();\n -> \'@localhost\'\n','http://dev.mysql.com/doc/refman/5.1/en/information-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (78,35,'LCASE','Syntax:\nLCASE(str)\n\nLCASE() is a synonym for LOWER().\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (79,17,'<=','Syntax:\n<=\n\nLess than or equal:\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html\n\n','mysql> SELECT 0.1 <= 2;\n -> 1\n','http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (80,25,'SHOW PROFILES','Syntax:\nSHOW PROFILE [type [, type] ... ]\n [FOR QUERY n]\n [LIMIT row_count [OFFSET offset]]\n\ntype:\n ALL\n | BLOCK IO\n | CONTEXT SWITCHES\n | CPU\n | IPC\n | MEMORY\n | PAGE FAULTS\n | SOURCE\n | SWAPS\n\nThe SHOW PROFILES and SHOW PROFILE statements display profiling\ninformation that indicates resource usage for statements executed\nduring the course of the current session.\n\nProfiling is controlled by the profiling session variable, which has a\ndefault value of 0 (OFF). Profiling is enabled by setting profiling to\n1 or ON:\n\nmysql> SET profiling = 1;\n\nSHOW PROFILES displays a list of the most recent statements sent to the\nmaster. The size of the list is controlled by the\nprofiling_history_size session variable, which has a default value of\n15. The maximum value is 100. Setting the value to 0 has the practical\neffect of disabling profiling.\n\nAll statements are profiled except SHOW PROFILES and SHOW PROFILE, so\nyou will find neither of those statements in the profile list.\nMalformed statements are profiled. For example, SHOW PROFILING is an\nillegal statement, and a syntax error occurs if you try to execute it,\nbut it will show up in the profiling list.\n\nSHOW PROFILE displays detailed information about a single statement.\nWithout the FOR QUERY n clause, the output pertains to the most\nrecently executed statement. If FOR QUERY n is included, SHOW PROFILE\ndisplays information for statement n. The values of n correspond to the\nQuery_ID values displayed by SHOW PROFILES.\n\nThe LIMIT row_count clause may be given to limit the output to\nrow_count rows. If LIMIT is given, OFFSET offset may be added to begin\nthe output offset rows into the full set of rows.\n\nBy default, SHOW PROFILE displays Status and Duration columns. The\nStatus values are like the State values displayed by SHOW PROCESSLIST,\nalthought there might be some minor differences in interpretion for the\ntwo statements for some status values (see\nhttp://dev.mysql.com/doc/refman/5.1/en/thread-information.html).\n\nOptional type values may be specified to display specific additional\ntypes of information:\n\no ALL displays all information\n\no BLOCK IO displays counts for block input and output operations\n\no CONTEXT SWITCHES displays counts for voluntary and involuntary\n context switches\n\no CPU displays user and system CPU usage times\n\no IPC displays counts for messages sent and received\n\no MEMORY is not currently implemented\n\no PAGE FAULTS displays counts for major and minor page faults\n\no SOURCE displays the names of functions from the source code, together\n with the name and line number of the file in which the function\n occurs\n\no SWAPS displays swap counts\n\nProfiling is enabled per session. When a session ends, its profiling\ninformation is lost.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-profiles.html\n\n','mysql> SELECT @@profiling;\n+-------------+\n| @@profiling |\n+-------------+\n| 0 |\n+-------------+\n1 row in set (0.00 sec)\n\nmysql> SET profiling = 1;\nQuery OK, 0 rows affected (0.00 sec)\n\nmysql> DROP TABLE IF EXISTS t1;\nQuery OK, 0 rows affected, 1 warning (0.00 sec)\n\nmysql> CREATE TABLE T1 (id INT);\nQuery OK, 0 rows affected (0.01 sec)\n\nmysql> SHOW PROFILES;\n+----------+----------+--------------------------+\n| Query_ID | Duration | Query |\n+----------+----------+--------------------------+\n| 0 | 0.000088 | SET PROFILING = 1 |\n| 1 | 0.000136 | DROP TABLE IF EXISTS t1 |\n| 2 | 0.011947 | CREATE TABLE t1 (id INT) |\n+----------+----------+--------------------------+\n3 rows in set (0.00 sec)\n\nmysql> SHOW PROFILE;\n+----------------------+----------+\n| Status | Duration |\n+----------------------+----------+\n| checking permissions | 0.000040 |\n| creating table | 0.000056 |\n| After create | 0.011363 |\n| query end | 0.000375 |\n| freeing items | 0.000089 |\n| logging slow query | 0.000019 |\n| cleaning up | 0.000005 |\n+----------------------+----------+\n7 rows in set (0.00 sec)\n\nmysql> SHOW PROFILE FOR QUERY 1;\n+--------------------+----------+\n| Status | Duration |\n+--------------------+----------+\n| query end | 0.000107 |\n| freeing items | 0.000008 |\n| logging slow query | 0.000015 |\n| cleaning up | 0.000006 |\n+--------------------+----------+\n4 rows in set (0.00 sec)\n\nmysql> SHOW PROFILE CPU FOR QUERY 2;\n+----------------------+----------+----------+------------+\n| Status | Duration | CPU_user | CPU_system |\n+----------------------+----------+----------+------------+\n| checking permissions | 0.000040 | 0.000038 | 0.000002 |\n| creating table | 0.000056 | 0.000028 | 0.000028 |\n| After create | 0.011363 | 0.000217 | 0.001571 |\n| query end | 0.000375 | 0.000013 | 0.000028 |\n| freeing items | 0.000089 | 0.000010 | 0.000014 |\n| logging slow query | 0.000019 | 0.000009 | 0.000010 |\n| cleaning up | 0.000005 | 0.000003 | 0.000002 |\n+----------------------+----------+----------+------------+\n7 rows in set (0.00 sec)\n','http://dev.mysql.com/doc/refman/5.1/en/show-profiles.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (81,26,'UPDATE','Syntax:\nSingle-table syntax:\n\nUPDATE [LOW_PRIORITY] [IGNORE] table_reference\n SET col_name1={expr1|DEFAULT} [, col_name2={expr2|DEFAULT}] ...\n [WHERE where_condition]\n [ORDER BY ...]\n [LIMIT row_count]\n\nMultiple-table syntax:\n\nUPDATE [LOW_PRIORITY] [IGNORE] table_references\n SET col_name1={expr1|DEFAULT} [, col_name2={expr2|DEFAULT}] ...\n [WHERE where_condition]\n\nFor the single-table syntax, the UPDATE statement updates columns of\nexisting rows in the named table with new values. The SET clause\nindicates which columns to modify and the values they should be given.\nEach value can be given as an expression, or the keyword DEFAULT to set\na column explicitly to its default value. The WHERE clause, if given,\nspecifies the conditions that identify which rows to update. With no\nWHERE clause, all rows are updated. If the ORDER BY clause is\nspecified, the rows are updated in the order that is specified. The\nLIMIT clause places a limit on the number of rows that can be updated.\n\nFor the multiple-table syntax, UPDATE updates rows in each table named\nin table_references that satisfy the conditions. In this case, ORDER BY\nand LIMIT cannot be used.\n\nwhere_condition is an expression that evaluates to true for each row to\nbe updated.\n\ntable_references and where_condition are is specified as described in\nhttp://dev.mysql.com/doc/refman/5.1/en/select.html.\n\nYou need the UPDATE privilege only for columns referenced in an UPDATE\nthat are actually updated. You need only the SELECT privilege for any\ncolumns that are read but not modified.\n\nThe UPDATE statement supports the following modifiers:\n\no If you use the LOW_PRIORITY keyword, execution of the UPDATE is\n delayed until no other clients are reading from the table. This\n affects only storage engines that use only table-level locking (such\n as MyISAM, MEMORY, and MERGE).\n\no If you use the IGNORE keyword, the update statement does not abort\n even if errors occur during the update. Rows for which duplicate-key\n conflicts occur are not updated. Rows for which columns are updated\n to values that would cause data conversion errors are updated to the\n closest valid values instead.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/update.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/update.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (82,17,'IS NOT NULL','Syntax:\nIS NOT NULL\n\nTests whether a value is not NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html\n\n','mysql> SELECT 1 IS NOT NULL, 0 IS NOT NULL, NULL IS NOT NULL;\n -> 1, 1, 0\n','http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (83,22,'CASE STATEMENT','Syntax:\nCASE case_value\n WHEN when_value THEN statement_list\n [WHEN when_value THEN statement_list] ...\n [ELSE statement_list]\nEND CASE\n\nOr:\n\nCASE\n WHEN search_condition THEN statement_list\n [WHEN search_condition THEN statement_list] ...\n [ELSE statement_list]\nEND CASE\n\nThe CASE statement for stored programs implements a complex conditional\nconstruct. If a search_condition evaluates to true, the corresponding\nSQL statement list is executed. If no search condition matches, the\nstatement list in the ELSE clause is executed. Each statement_list\nconsists of one or more statements.\n\nIf no when_value or search_condition matches the value tested and the\nCASE statement contains no ELSE clause, a Case not found for CASE\nstatement error results.\n\nEach statement_list consists of one or more statements; an empty\nstatement_list is not allowed. To handle situations where no value is\nmatched by any WHEN clause, use an ELSE containing an empty BEGIN ...\nEND block, as shown in this example: DELIMITER | CREATE PROCEDURE p()\nBEGIN DECLARE v INT DEFAULT 1; CASE v WHEN 2 THEN SELECT v; WHEN 3 THEN\nSELECT 0; ELSE BEGIN END; END CASE; END; | (The indentation used here\nin the ELSE clause is for purposes of clarity only, and is not\notherwise significant.)\n\n*Note*: The syntax of the CASE statement used inside stored programs\ndiffers slightly from that of the SQL CASE expression described in\nhttp://dev.mysql.com/doc/refman/5.1/en/control-flow-functions.html. The\nCASE statement cannot have an ELSE NULL clause, and it is terminated\nwith END CASE instead of END.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/case-statement.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/case-statement.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (84,25,'EXECUTE STATEMENT','Syntax:\nEXECUTE stmt_name\n [USING @var_name [, @var_name] ...]\n\nAfter preparing a statement with PREPARE, you execute it with an\nEXECUTE statement that refers to the prepared statement name. If the\nprepared statement contains any parameter markers, you must supply a\nUSING clause that lists user variables containing the values to be\nbound to the parameters. Parameter values can be supplied only by user\nvariables, and the USING clause must name exactly as many variables as\nthe number of parameter markers in the statement.\n\nYou can execute a given prepared statement multiple times, passing\ndifferent variables to it or setting the variables to different values\nbefore each execution.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/execute.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/execute.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (85,37,'DROP INDEX','Syntax:\nDROP [ONLINE|OFFLINE] INDEX index_name ON tbl_name\n\nDROP INDEX drops the index named index_name from the table tbl_name.\nThis statement is mapped to an ALTER TABLE statement to drop the index.\nSee [HELP ALTER TABLE].\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/drop-index.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/drop-index.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (86,35,'MATCH AGAINST','Syntax:\nMATCH (col1,col2,...) AGAINST (expr [search_modifier])\n\nMySQL has support for full-text indexing and searching:\n\no A full-text index in MySQL is an index of type FULLTEXT.\n\no Full-text indexes can be used only with MyISAM tables, and can be\n created only for CHAR, VARCHAR, or TEXT columns.\n\no A FULLTEXT index definition can be given in the CREATE TABLE\n statement when a table is created, or added later using ALTER TABLE\n or CREATE INDEX.\n\no For large data sets, it is much faster to load your data into a table\n that has no FULLTEXT index and then create the index after that, than\n to load data into a table that has an existing FULLTEXT index.\n\nFull-text searching is performed using MATCH() ... AGAINST syntax.\nMATCH() takes a comma-separated list that names the columns to be\nsearched. AGAINST takes a string to search for, and an optional\nmodifier that indicates what type of search to perform. The search\nstring must be a literal string, not a variable or a column name. There\nare three types of full-text searches:\n\no A boolean search interprets the search string using the rules of a\n special query language. The string contains the words to search for.\n It can also contain operators that specify requirements such that a\n word must be present or absent in matching rows, or that it should be\n weighted higher or lower than usual. Common words such as "some" or\n "then" are stopwords and do not match if present in the search\n string. The IN BOOLEAN MODE modifier specifies a boolean search. For\n more information, see\n http://dev.mysql.com/doc/refman/5.1/en/fulltext-boolean.html.\n\no A natural language search interprets the search string as a phrase in\n natural human language (a phrase in free text). There are no special\n operators. The stopword list applies. In addition, words that are\n present in 50% or more of the rows are considered common and do not\n match. Full-text searches are natural language searches if the IN\n NATURAL LANGUAGE MODE modifier is given or if no modifier is given.\n\no A query expansion search is a modification of a natural language\n search. The search string is used to perform a natural language\n search. Then words from the most relevant rows returned by the search\n are added to the search string and the search is done again. The\n query returns the rows from the second search. The IN NATURAL\n LANGUAGE MODE WITH QUERY EXPANSION or WITH QUERY EXPANSION modifier\n specifies a query expansion search. For more information, see\n http://dev.mysql.com/doc/refman/5.1/en/fulltext-query-expansion.html.\n\nThe IN NATURAL LANGUAGE MODE and IN NATURAL LANGUAGE MODE WITH QUERY\nEXPANSION modifiers were added in MySQL 5.1.7.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/fulltext-search.html\n\n','mysql> SELECT id, body, MATCH (title,body) AGAINST\n -> (\'Security implications of running MySQL as root\'\n -> IN NATURAL LANGUAGE MODE) AS score\n -> FROM articles WHERE MATCH (title,body) AGAINST\n -> (\'Security implications of running MySQL as root\'\n -> IN NATURAL LANGUAGE MODE);\n+----+-------------------------------------+-----------------+\n| id | body | score |\n+----+-------------------------------------+-----------------+\n| 4 | 1. Never run mysqld as root. 2. ... | 1.5219271183014 |\n| 6 | When configured properly, MySQL ... | 1.3114095926285 |\n+----+-------------------------------------+-----------------+\n2 rows in set (0.00 sec)\n','http://dev.mysql.com/doc/refman/5.1/en/fulltext-search.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (87,37,'CREATE EVENT','Syntax:\nCREATE\n [DEFINER = { user | CURRENT_USER }]\n EVENT\n [IF NOT EXISTS]\n event_name\n ON SCHEDULE schedule\n [ON COMPLETION [NOT] PRESERVE]\n [ENABLE | DISABLE | DISABLE ON SLAVE]\n [COMMENT \'comment\']\n DO sql_statement;\n\nschedule:\n AT timestamp [+ INTERVAL interval] ...\n | EVERY interval\n [STARTS timestamp [+ INTERVAL interval] ...]\n [ENDS timestamp [+ INTERVAL interval] ...]\n\ninterval:\n quantity {YEAR | QUARTER | MONTH | DAY | HOUR | MINUTE |\n WEEK | SECOND | YEAR_MONTH | DAY_HOUR | DAY_MINUTE |\n DAY_SECOND | HOUR_MINUTE | HOUR_SECOND | MINUTE_SECOND}\n\nThis statement creates and schedules a new event. It requires the EVENT\nprivilege for the schema in which the event is to be created (and\nperhaps SUPER depending on the DEFINER value, as described later). The\nevent will not run unless the Event Scheduler is enabled. For\ninformation about checking Event Scheduler status and enabling it if\nnecessary, see\nhttp://dev.mysql.com/doc/refman/5.1/en/events-configuration.html.\n\nThe minimum requirements for a valid CREATE EVENT statement are as\nfollows:\n\no The keywords CREATE EVENT plus an event name, which uniquely\n identifies the event within a database schema. (Prior to MySQL\n 5.1.12, the event name needed to be unique only among events created\n by the same user within a schema.)\n\no An ON SCHEDULE clause, which determines when and how often the event\n executes.\n\no A DO clause, which contains the SQL statement to be executed by an\n event.\n\nThis is an example of a minimal CREATE EVENT statement:\n\nCREATE EVENT myevent\n ON SCHEDULE AT CURRENT_TIMESTAMP + INTERVAL 1 HOUR\n DO\n UPDATE myschema.mytable SET mycol = mycol + 1;\n\nThe previous statement creates an event named myevent. This event\nexecutes once --- one hour following its creation --- by running an SQL\nstatement that increments the value of the myschema.mytable table\'s\nmycol column by 1.\n\nThe event_name must be a valid MySQL identifier with a maximum length\nof 64 characters. Event names are not case sensitive, so you cannot\nhave two events named myevent and MyEvent in the same schema. In\ngeneral, the rules governing event names are the same as those for\nnames of stored routines. See\nhttp://dev.mysql.com/doc/refman/5.1/en/identifiers.html.\n\nAn event is associated with a schema. If no schema is indicated as part\nof event_name, the default (current) schema is assumed. To create an\nevent in a specific schema, qualify the event name with a schema using\nschema_name.event_name syntax.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/create-event.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/create-event.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (88,4,'ABS','Syntax:\nABS(X)\n\nReturns the absolute value of X.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html\n\n','mysql> SELECT ABS(2);\n -> 2\nmysql> SELECT ABS(-32);\n -> 32\n','http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (89,31,'POLYFROMWKB','PolyFromWKB(wkb[,srid]), PolygonFromWKB(wkb[,srid])\n\nConstructs a POLYGON value using its WKB representation and SRID.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-wkb-functions\n\n','','http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-wkb-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (90,35,'NOT LIKE','Syntax:\nexpr NOT LIKE pat [ESCAPE \'escape_char\']\n\nThis is the same as NOT (expr LIKE pat [ESCAPE \'escape_char\']).\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-comparison-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/string-comparison-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (91,35,'SPACE','Syntax:\nSPACE(N)\n\nReturns a string consisting of N space characters.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','mysql> SELECT SPACE(6);\n -> \' \'\n','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (92,6,'MBR DEFINITION','Its MBR (Minimum Bounding Rectangle), or Envelope. This is the bounding\ngeometry, formed by the minimum and maximum (X,Y) coordinates:\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/gis-class-geometry.html\n\n','((MINX MINY, MAXX MINY, MAXX MAXY, MINX MAXY, MINX MINY))\n','http://dev.mysql.com/doc/refman/5.1/en/gis-class-geometry.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (93,23,'GEOMETRYCOLLECTION','GeometryCollection(g1,g2,...)\n\nConstructs a GeometryCollection.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-mysql-specific-functions\n\n','','http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-mysql-specific-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (94,16,'MAX','Syntax:\nMAX([DISTINCT] expr)\n\nReturns the maximum value of expr. MAX() may take a string argument; in\nsuch cases, it returns the maximum string value. See\nhttp://dev.mysql.com/doc/refman/5.1/en/mysql-indexes.html. The DISTINCT\nkeyword can be used to find the maximum of the distinct values of expr,\nhowever, this produces the same result as omitting DISTINCT.\n\nMAX() returns NULL if there were no matching rows.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/group-by-functions.html\n\n','mysql> SELECT student_name, MIN(test_score), MAX(test_score)\n -> FROM student\n -> GROUP BY student_name;\n','http://dev.mysql.com/doc/refman/5.1/en/group-by-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (95,21,'CREATE FUNCTION UDF','Syntax:\nCREATE [AGGREGATE] FUNCTION function_name RETURNS {STRING|INTEGER|REAL|DECIMAL}\n SONAME shared_library_name\n\nA user-defined function (UDF) is a way to extend MySQL with a new\nfunction that works like a native (built-in) MySQL function such as\nABS() or CONCAT().\n\nfunction_name is the name that should be used in SQL statements to\ninvoke the function. The RETURNS clause indicates the type of the\nfunction\'s return value. DECIMAL is a legal value after RETURNS, but\ncurrently DECIMAL functions return string values and should be written\nlike STRING functions.\n\nshared_library_name is the basename of the shared object file that\ncontains the code that implements the function. The file must be\nlocated in the plugin directory. This directory is given by the value\nof the plugin_dir system variable.\n\n*Note*: This is a change in MySQL 5.1. For earlier versions of MySQL,\nthe shared object can be located in any directory that is searched by\nyour system\'s dynamic linker.\n\nTo create a function, you must have the INSERT privilege for the mysql\ndatabase. This is necessary because CREATE FUNCTION adds a row to the\nmysql.func system table that records the function\'s name, type, and\nshared library name. If you do not have this table, you should run the\nmysql_upgrade command to create it. See\nhttp://dev.mysql.com/doc/refman/5.1/en/mysql-upgrade.html.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/create-function-udf.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/create-function-udf.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (96,4,'*','Syntax:\n*\n\nMultiplication:\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/arithmetic-functions.html\n\n','mysql> SELECT 3*5;\n -> 15\nmysql> SELECT 18014398509481984*18014398509481984.0;\n -> 324518553658426726783156020576256.0\nmysql> SELECT 18014398509481984*18014398509481984;\n -> 0\n','http://dev.mysql.com/doc/refman/5.1/en/arithmetic-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (97,20,'TIMESTAMP','TIMESTAMP\n\nA timestamp. The range is \'1970-01-01 00:00:01\' UTC to \'2038-01-19\n03:14:07\' UTC. TIMESTAMP values are stored as the number of seconds\nsince the epoch (\'1970-01-01 00:00:00\' UTC). A TIMESTAMP cannot\nrepresent the value \'1970-01-01 00:00:00\' because that is equivalent to\n0 seconds from the epoch and the value 0 is reserved for representing\n\'0000-00-00 00:00:00\', the "zero" TIMESTAMP value.\n\nA TIMESTAMP column is useful for recording the date and time of an\nINSERT or UPDATE operation. By default, the first TIMESTAMP column in a\ntable is automatically set to the date and time of the most recent\noperation if you do not assign it a value yourself. You can also set\nany TIMESTAMP column to the current date and time by assigning it a\nNULL value. Variations on automatic initialization and update\nproperties are described in\nhttp://dev.mysql.com/doc/refman/5.1/en/timestamp.html.\n\nA TIMESTAMP value is returned as a string in the format \'YYYY-MM-DD\nHH:MM:SS\' with a display width fixed at 19 characters. To obtain the\nvalue as a number, you should add +0 to the timestamp column.\n\n*Note*: The TIMESTAMP format that was used prior to MySQL 4.1 is not\nsupported in MySQL 5.1; see MySQL 3.23, 4.0, 4.1 Reference Manual for\ninformation regarding the old format.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-type-overview.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (98,11,'DES_DECRYPT','Syntax:\nDES_DECRYPT(crypt_str[,key_str])\n\nDecrypts a string encrypted with DES_ENCRYPT(). If an error occurs,\nthis function returns NULL.\n\nThis function works only if MySQL has been configured with SSL support.\nSee http://dev.mysql.com/doc/refman/5.1/en/secure-connections.html.\n\nIf no key_str argument is given, DES_DECRYPT() examines the first byte\nof the encrypted string to determine the DES key number that was used\nto encrypt the original string, and then reads the key from the DES key\nfile to decrypt the message. For this to work, the user must have the\nSUPER privilege. The key file can be specified with the --des-key-file\nserver option.\n\nIf you pass this function a key_str argument, that string is used as\nthe key for decrypting the message.\n\nIf the crypt_str argument does not appear to be an encrypted string,\nMySQL returns the given crypt_str.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/encryption-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/encryption-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (99,25,'CACHE INDEX','Syntax:\nCACHE INDEX\n tbl_index_list [, tbl_index_list] ...\n IN key_cache_name\n\ntbl_index_list:\n tbl_name [[INDEX|KEY] (index_name[, index_name] ...)]\n\nThe CACHE INDEX statement assigns table indexes to a specific key\ncache. It is used only for MyISAM tables.\n\nThe following statement assigns indexes from the tables t1, t2, and t3\nto the key cache named hot_cache:\n\nmysql> CACHE INDEX t1, t2, t3 IN hot_cache;\n+---------+--------------------+----------+----------+\n| Table | Op | Msg_type | Msg_text |\n+---------+--------------------+----------+----------+\n| test.t1 | assign_to_keycache | status | OK |\n| test.t2 | assign_to_keycache | status | OK |\n| test.t3 | assign_to_keycache | status | OK |\n+---------+--------------------+----------+----------+\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/cache-index.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/cache-index.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (100,12,'ENDPOINT','EndPoint(ls)\n\nReturns the Point that is the endpoint of the LineString value ls.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#linestring-property-functions\n\n','mysql> SET @ls = \'LineString(1 1,2 2,3 3)\';\nmysql> SELECT AsText(EndPoint(GeomFromText(@ls)));\n+-------------------------------------+\n| AsText(EndPoint(GeomFromText(@ls))) |\n+-------------------------------------+\n| POINT(3 3) |\n+-------------------------------------+\n','http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#linestring-property-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (101,11,'COMPRESS','Syntax:\nCOMPRESS(string_to_compress)\n\nCompresses a string and returns the result as a binary string. This\nfunction requires MySQL to have been compiled with a compression\nlibrary such as zlib. Otherwise, the return value is always NULL. The\ncompressed string can be uncompressed with UNCOMPRESS().\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/encryption-functions.html\n\n','mysql> SELECT LENGTH(COMPRESS(REPEAT(\'a\',1000)));\n -> 21\nmysql> SELECT LENGTH(COMPRESS(\'\'));\n -> 0\nmysql> SELECT LENGTH(COMPRESS(\'a\'));\n -> 13\nmysql> SELECT LENGTH(COMPRESS(REPEAT(\'a\',16)));\n -> 15\n','http://dev.mysql.com/doc/refman/5.1/en/encryption-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (102,26,'INSERT','Syntax:\nINSERT [LOW_PRIORITY | DELAYED | HIGH_PRIORITY] [IGNORE]\n [INTO] tbl_name [(col_name,...)]\n {VALUES | VALUE} ({expr | DEFAULT},...),(...),...\n [ ON DUPLICATE KEY UPDATE\n col_name=expr\n [, col_name=expr] ... ]\n\nOr:\n\nINSERT [LOW_PRIORITY | DELAYED | HIGH_PRIORITY] [IGNORE]\n [INTO] tbl_name\n SET col_name={expr | DEFAULT}, ...\n [ ON DUPLICATE KEY UPDATE\n col_name=expr\n [, col_name=expr] ... ]\n\nOr:\n\nINSERT [LOW_PRIORITY | HIGH_PRIORITY] [IGNORE]\n [INTO] tbl_name [(col_name,...)]\n SELECT ...\n [ ON DUPLICATE KEY UPDATE\n col_name=expr\n [, col_name=expr] ... ]\n\nINSERT inserts new rows into an existing table. The INSERT ... VALUES\nand INSERT ... SET forms of the statement insert rows based on\nexplicitly specified values. The INSERT ... SELECT form inserts rows\nselected from another table or tables. INSERT ... SELECT is discussed\nfurther in [HELP INSERT SELECT].\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/insert.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/insert.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (103,16,'COUNT','Syntax:\nCOUNT(expr)\n\nReturns a count of the number of non-NULL values of expr in the rows\nretrieved by a SELECT statement. The result is a BIGINT value.\n\nCOUNT() returns 0 if there were no matching rows.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/group-by-functions.html\n\n','mysql> SELECT student.student_name,COUNT(*)\n -> FROM student,course\n -> WHERE student.student_id=course.student_id\n -> GROUP BY student_name;\n','http://dev.mysql.com/doc/refman/5.1/en/group-by-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (104,26,'HANDLER','Syntax:\nHANDLER tbl_name OPEN [ [AS] alias]\n\nHANDLER tbl_name READ index_name { = | <= | >= | < | > } (value1,value2,...)\n [ WHERE where_condition ] [LIMIT ... ]\nHANDLER tbl_name READ index_name { FIRST | NEXT | PREV | LAST }\n [ WHERE where_condition ] [LIMIT ... ]\nHANDLER tbl_name READ { FIRST | NEXT }\n [ WHERE where_condition ] [LIMIT ... ]\n\nHANDLER tbl_name CLOSE\n\nThe HANDLER statement provides direct access to table storage engine\ninterfaces. It is available for MyISAM and InnoDB tables.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/handler.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/handler.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (105,3,'MLINEFROMTEXT','MLineFromText(wkt[,srid]), MultiLineStringFromText(wkt[,srid])\n\nConstructs a MULTILINESTRING value using its WKT representation and\nSRID.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-wkt-functions\n\n','','http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-wkt-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (106,31,'GEOMCOLLFROMWKB','GeomCollFromWKB(wkb[,srid]), GeometryCollectionFromWKB(wkb[,srid])\n\nConstructs a GEOMETRYCOLLECTION value using its WKB representation and\nSRID.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-wkb-functions\n\n','','http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-wkb-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (107,37,'RENAME TABLE','Syntax:\nRENAME TABLE tbl_name TO new_tbl_name\n [, tbl_name2 TO new_tbl_name2] ...\n\nThis statement renames one or more tables.\n\nThe rename operation is done atomically, which means that no other\nsession can access any of the tables while the rename is running. For\nexample, if you have an existing table old_table, you can create\nanother table new_table that has the same structure but is empty, and\nthen replace the existing table with the empty one as follows (assuming\nthat backup_table does not already exist):\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/rename-table.html\n\n','CREATE TABLE new_table (...);\nRENAME TABLE old_table TO backup_table, new_table TO old_table;\n','http://dev.mysql.com/doc/refman/5.1/en/rename-table.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (108,20,'BOOLEAN','BOOL, BOOLEAN\n\nThese types are synonyms for TINYINT(1). A value of zero is considered\nfalse. Nonzero values are considered true:\n\nmysql> SELECT IF(0, \'true\', \'false\');\n+------------------------+\n| IF(0, \'true\', \'false\') |\n+------------------------+\n| false |\n+------------------------+\n\nmysql> SELECT IF(1, \'true\', \'false\');\n+------------------------+\n| IF(1, \'true\', \'false\') |\n+------------------------+\n| true |\n+------------------------+\n\nmysql> SELECT IF(2, \'true\', \'false\');\n+------------------------+\n| IF(2, \'true\', \'false\') |\n+------------------------+\n| true |\n+------------------------+\n\nHowever, the values TRUE and FALSE are merely aliases for 1 and 0,\nrespectively, as shown here:\n\nmysql> SELECT IF(0 = FALSE, \'true\', \'false\');\n+--------------------------------+\n| IF(0 = FALSE, \'true\', \'false\') |\n+--------------------------------+\n| true |\n+--------------------------------+\n\nmysql> SELECT IF(1 = TRUE, \'true\', \'false\');\n+-------------------------------+\n| IF(1 = TRUE, \'true\', \'false\') |\n+-------------------------------+\n| true |\n+-------------------------------+\n\nmysql> SELECT IF(2 = TRUE, \'true\', \'false\');\n+-------------------------------+\n| IF(2 = TRUE, \'true\', \'false\') |\n+-------------------------------+\n| false |\n+-------------------------------+\n\nmysql> SELECT IF(2 = FALSE, \'true\', \'false\');\n+--------------------------------+\n| IF(2 = FALSE, \'true\', \'false\') |\n+--------------------------------+\n| false |\n+--------------------------------+\n\nThe last two statements display the results shown because 2 is equal to\nneither 1 nor 0.\n\nWe intend to implement full boolean type handling, in accordance with\nstandard SQL, in a future MySQL release.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/numeric-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/numeric-type-overview.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (109,14,'DEFAULT','Syntax:\nDEFAULT(col_name)\n\nReturns the default value for a table column. An error results if the\ncolumn has no default value.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/miscellaneous-functions.html\n\n','mysql> UPDATE t SET i = DEFAULT(i)+1 WHERE id < 100;\n','http://dev.mysql.com/doc/refman/5.1/en/miscellaneous-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (110,4,'MOD','Syntax:\nMOD(N,M), N % M, N MOD M\n\nModulo operation. Returns the remainder of N divided by M.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html\n\n','mysql> SELECT MOD(234, 10);\n -> 4\nmysql> SELECT 253 % 7;\n -> 1\nmysql> SELECT MOD(29,9);\n -> 2\nmysql> SELECT 29 MOD 9;\n -> 2\n','http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (111,20,'TINYTEXT','TINYTEXT [CHARACTER SET charset_name] [COLLATE collation_name]\n\nA TEXT column with a maximum length of 255 (28 - 1) characters. The\neffective maximum length is less if the value contains multi-byte\ncharacters. Each TINYTEXT value is stored using a one-byte length\nprefix that indicates the number of bytes in the value.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/string-type-overview.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (112,19,'OPTIMIZE TABLE','Syntax:\nOPTIMIZE [NO_WRITE_TO_BINLOG | LOCAL] TABLE\n tbl_name [, tbl_name] ...\n\nOPTIMIZE TABLE should be used if you have deleted a large part of a\ntable or if you have made many changes to a table with variable-length\nrows (tables that have VARCHAR, VARBINARY, BLOB, or TEXT columns).\nDeleted rows are maintained in a linked list and subsequent INSERT\noperations reuse old row positions. You can use OPTIMIZE TABLE to\nreclaim the unused space and to defragment the data file.\n\nThis statement requires SELECT and INSERT privileges for the table.\n\nBeginning with MySQL 5.1.27, OPTIMIZE TABLE is also supported for\npartitioned tables. Also beginning with MySQL 5.1.27, you can use ALTER\nTABLE ... OPTIMIZE PARTITION to optimize one or more partitions; for\nmore information, see [HELP ALTER TABLE], and\nhttp://dev.mysql.com/doc/refman/5.1/en/partitioning-maintenance.html.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/optimize-table.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/optimize-table.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (113,11,'DECODE','Syntax:\nDECODE(crypt_str,pass_str)\n\nDecrypts the encrypted string crypt_str using pass_str as the password.\ncrypt_str should be a string returned from ENCODE().\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/encryption-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/encryption-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (114,17,'<=>','Syntax:\n<=>\n\nNULL-safe equal. This operator performs an equality comparison like the\n= operator, but returns 1 rather than NULL if both operands are NULL,\nand 0 rather than NULL if one operand is NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html\n\n','mysql> SELECT 1 <=> 1, NULL <=> NULL, 1 <=> NULL;\n -> 1, 1, 0\nmysql> SELECT 1 = 1, NULL = NULL, 1 = NULL;\n -> 1, NULL, NULL\n','http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (115,27,'HELP STATEMENT','Syntax:\nHELP \'search_string\'\n\nThe HELP statement returns online information from the MySQL Reference\nmanual. Its proper operation requires that the help tables in the mysql\ndatabase be initialized with help topic information (see\nhttp://dev.mysql.com/doc/refman/5.1/en/server-side-help-support.html).\n\nThe HELP statement searches the help tables for the given search string\nand displays the result of the search. The search string is not case\nsensitive.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/help.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/help.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (116,25,'LOAD DATA FROM MASTER','Syntax:\nLOAD DATA FROM MASTER\n\nThis feature is deprecated and should be avoided. It is subject to\nremoval in a future version of MySQL.\n\nSince the current implementation of LOAD DATA FROM MASTER and LOAD\nTABLE FROM MASTER is very limited, these statements are deprecated as\nof MySQL 4.1 and removed in MySQL 5.5.\n\nThe recommended alternative solution to using LOAD DATA FROM MASTER or\nLOAD TABLE FROM MASTER is using mysqldump or mysqlhotcopy. The latter\nrequires Perl and two Perl modules (DBI and DBD:mysql) and works for\nMyISAM and ARCHIVE tables only. With mysqldump, you can create SQL\ndumps on the master and pipe (or copy) these to a mysql client on the\nslave. This has the advantage of working for all storage engines, but\ncan be quite slow, since it works using SELECT.\n\nThis statement takes a snapshot of the master and copies it to the\nslave. It updates the values of MASTER_LOG_FILE and MASTER_LOG_POS so\nthat the slave starts replicating from the correct position. Any table\nand database exclusion rules specified with the --replicate-*-do-* and\n--replicate-*-ignore-* options are honored. --replicate-rewrite-db is\nnot taken into account because a user could use this option to set up a\nnonunique mapping such as --replicate-rewrite-db="db1->db3" and\n--replicate-rewrite-db="db2->db3", which would confuse the slave when\nloading tables from the master.\n\nUse of this statement is subject to the following conditions:\n\no It works only for MyISAM tables. Attempting to load a non-MyISAM\n table results in the following error:\n\nERROR 1189 (08S01): Net error reading from master\n\no It acquires a global read lock on the master while taking the\n snapshot, which prevents updates on the master during the load\n operation.\n\nIf you are loading large tables, you might have to increase the values\nof net_read_timeout and net_write_timeout on both the master and slave\nservers. See\nhttp://dev.mysql.com/doc/refman/5.1/en/server-system-variables.html.\n\nNote that LOAD DATA FROM MASTER does not copy any tables from the mysql\ndatabase. This makes it easy to have different users and privileges on\nthe master and the slave.\n\nTo use LOAD DATA FROM MASTER, the replication account that is used to\nconnect to the master must have the RELOAD and SUPER privileges on the\nmaster and the SELECT privilege for all master tables you want to load.\nAll master tables for which the user does not have the SELECT privilege\nare ignored by LOAD DATA FROM MASTER. This is because the master hides\nthem from the user: LOAD DATA FROM MASTER calls SHOW DATABASES to know\nthe master databases to load, but SHOW DATABASES returns only databases\nfor which the user has some privilege. See [HELP SHOW DATABASES]. On\nthe slave side, the user that issues LOAD DATA FROM MASTER must have\nprivileges for dropping and creating the databases and tables that are\ncopied.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/load-data-from-master.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/load-data-from-master.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (117,25,'RESET','Syntax:\nRESET reset_option [, reset_option] ...\n\nThe RESET statement is used to clear the state of various server\noperations. You must have the RELOAD privilege to execute RESET.\n\nRESET acts as a stronger version of the FLUSH statement. See [HELP\nFLUSH].\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/reset.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/reset.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (118,14,'GET_LOCK','Syntax:\nGET_LOCK(str,timeout)\n\nTries to obtain a lock with a name given by the string str, using a\ntimeout of timeout seconds. Returns 1 if the lock was obtained\nsuccessfully, 0 if the attempt timed out (for example, because another\nclient has previously locked the name), or NULL if an error occurred\n(such as running out of memory or the thread was killed with mysqladmin\nkill). If you have a lock obtained with GET_LOCK(), it is released when\nyou execute RELEASE_LOCK(), execute a new GET_LOCK(), or your\nconnection terminates (either normally or abnormally). Locks obtained\nwith GET_LOCK() do not interact with transactions. That is, committing\na transaction does not release any such locks obtained during the\ntransaction.\n\nThis function can be used to implement application locks or to simulate\nrecord locks. Names are locked on a server-wide basis. If a name has\nbeen locked by one client, GET_LOCK() blocks any request by another\nclient for a lock with the same name. This allows clients that agree on\na given lock name to use the name to perform cooperative advisory\nlocking. But be aware that it also allows a client that is not among\nthe set of cooperating clients to lock a name, either inadvertently or\ndeliberately, and thus prevent any of the cooperating clients from\nlocking that name. One way to reduce the likelihood of this is to use\nlock names that are database-specific or application-specific. For\nexample, use lock names of the form db_name.str or app_name.str.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/miscellaneous-functions.html\n\n','mysql> SELECT GET_LOCK(\'lock1\',10);\n -> 1\nmysql> SELECT IS_FREE_LOCK(\'lock2\');\n -> 1\nmysql> SELECT GET_LOCK(\'lock2\',10);\n -> 1\nmysql> SELECT RELEASE_LOCK(\'lock2\');\n -> 1\nmysql> SELECT RELEASE_LOCK(\'lock1\');\n -> NULL\n','http://dev.mysql.com/doc/refman/5.1/en/miscellaneous-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (119,35,'UCASE','Syntax:\nUCASE(str)\n\nUCASE() is a synonym for UPPER().\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (120,25,'SHOW BINLOG EVENTS','Syntax:\nSHOW BINLOG EVENTS\n [IN \'log_name\'] [FROM pos] [LIMIT [offset,] row_count]\n\nShows the events in the binary log. If you do not specify \'log_name\',\nthe first binary log is displayed.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-binlog-events.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/show-binlog-events.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (121,31,'MPOLYFROMWKB','MPolyFromWKB(wkb[,srid]), MultiPolygonFromWKB(wkb[,srid])\n\nConstructs a MULTIPOLYGON value using its WKB representation and SRID.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-wkb-functions\n\n','','http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-wkb-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (122,22,'ITERATE','Syntax:\nITERATE label\n\nITERATE can appear only within LOOP, REPEAT, and WHILE statements.\nITERATE means "do the loop again."\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/iterate-statement.html\n\n','CREATE PROCEDURE doiterate(p1 INT)\nBEGIN\n label1: LOOP\n SET p1 = p1 + 1;\n IF p1 < 10 THEN ITERATE label1; END IF;\n LEAVE label1;\n END LOOP label1;\n SET @x = p1;\nEND\n','http://dev.mysql.com/doc/refman/5.1/en/iterate-statement.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (123,26,'DO','Syntax:\nDO expr [, expr] ...\n\nDO executes the expressions but does not return any results. In most\nrespects, DO is shorthand for SELECT expr, ..., but has the advantage\nthat it is slightly faster when you do not care about the result.\n\nDO is useful primarily with functions that have side effects, such as\nRELEASE_LOCK().\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/do.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/do.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (124,30,'CURTIME','Syntax:\nCURTIME()\n\nReturns the current time as a value in \'HH:MM:SS\' or HHMMSS.uuuuuu\nformat, depending on whether the function is used in a string or\nnumeric context. The value is expressed in the current time zone.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT CURTIME();\n -> \'23:50:26\'\nmysql> SELECT CURTIME() + 0;\n -> 235026.000000\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (125,35,'CHAR_LENGTH','Syntax:\nCHAR_LENGTH(str)\n\nReturns the length of the string str, measured in characters. A\nmulti-byte character counts as a single character. This means that for\na string containing five two-byte characters, LENGTH() returns 10,\nwhereas CHAR_LENGTH() returns 5.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (126,20,'BIGINT','BIGINT[(M)] [UNSIGNED] [ZEROFILL]\n\nA large integer. The signed range is -9223372036854775808 to\n9223372036854775807. The unsigned range is 0 to 18446744073709551615.\n\nSERIAL is an alias for BIGINT UNSIGNED NOT NULL AUTO_INCREMENT UNIQUE.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/numeric-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/numeric-type-overview.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (127,25,'SET','Syntax:\nSET variable_assignment [, variable_assignment] ...\n\nvariable_assignment:\n user_var_name = expr\n | [GLOBAL | SESSION] system_var_name = expr\n | [@@global. | @@session. | @@]system_var_name = expr\n\nThe SET statement assigns values to different types of variables that\naffect the operation of the server or your client. Older versions of\nMySQL employed SET OPTION, but this syntax is deprecated in favor of\nSET without OPTION.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/set-option.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/set-option.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (128,4,'CONV','Syntax:\nCONV(N,from_base,to_base)\n\nConverts numbers between different number bases. Returns a string\nrepresentation of the number N, converted from base from_base to base\nto_base. Returns NULL if any argument is NULL. The argument N is\ninterpreted as an integer, but may be specified as an integer or a\nstring. The minimum base is 2 and the maximum base is 36. If to_base is\na negative number, N is regarded as a signed number. Otherwise, N is\ntreated as unsigned. CONV() works with 64-bit precision.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html\n\n','mysql> SELECT CONV(\'a\',16,2);\n -> \'1010\'\nmysql> SELECT CONV(\'6E\',18,8);\n -> \'172\'\nmysql> SELECT CONV(-17,10,-18);\n -> \'-H\'\nmysql> SELECT CONV(10+\'10\'+\'10\'+0xa,10,10);\n -> \'40\'\n','http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (129,20,'DATE','DATE\n\nA date. The supported range is \'1000-01-01\' to \'9999-12-31\'. MySQL\ndisplays DATE values in \'YYYY-MM-DD\' format, but allows assignment of\nvalues to DATE columns using either strings or numbers.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-type-overview.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (130,25,'SHOW OPEN TABLES','Syntax:\nSHOW OPEN TABLES [{FROM | IN} db_name]\n [LIKE \'pattern\' | WHERE expr]\n\nSHOW OPEN TABLES lists the non-TEMPORARY tables that are currently open\nin the table cache. See\nhttp://dev.mysql.com/doc/refman/5.1/en/table-cache.html. The WHERE\nclause can be given to select rows using more general conditions, as\ndiscussed in http://dev.mysql.com/doc/refman/5.1/en/extended-show.html.\n\nThe FROM and LIKE clauses may be used beginning with MySQL 5.1.24. The\nLIKE clause, if present, indicates which table names to match. The FROM\nclause, if present, restricts the tables shown to those present in the\ndb_name database.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-open-tables.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/show-open-tables.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (131,30,'EXTRACT','Syntax:\nEXTRACT(unit FROM date)\n\nThe EXTRACT() function uses the same kinds of unit specifiers as\nDATE_ADD() or DATE_SUB(), but extracts parts from the date rather than\nperforming date arithmetic.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT EXTRACT(YEAR FROM \'2009-07-02\');\n -> 2009\nmysql> SELECT EXTRACT(YEAR_MONTH FROM \'2009-07-02 01:02:03\');\n -> 200907\nmysql> SELECT EXTRACT(DAY_MINUTE FROM \'2009-07-02 01:02:03\');\n -> 20102\nmysql> SELECT EXTRACT(MICROSECOND\n -> FROM \'2003-01-02 10:30:00.000123\');\n -> 123\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (132,11,'ENCRYPT','Syntax:\nENCRYPT(str[,salt])\n\nEncrypts str using the Unix crypt() system call and returns a binary\nstring. The salt argument should be a string with at least two\ncharacters. If no salt argument is given, a random value is used.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/encryption-functions.html\n\n','mysql> SELECT ENCRYPT(\'hello\');\n -> \'VxuFAJXVARROc\'\n','http://dev.mysql.com/doc/refman/5.1/en/encryption-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (133,25,'SHOW STATUS','Syntax:\nSHOW [GLOBAL | SESSION] STATUS\n [LIKE \'pattern\' | WHERE expr]\n\nSHOW STATUS provides server status information. This information also\ncan be obtained using the mysqladmin extended-status command. The LIKE\nclause, if present, indicates which variable names to match. The WHERE\nclause can be given to select rows using more general conditions, as\ndiscussed in http://dev.mysql.com/doc/refman/5.1/en/extended-show.html.\nThis statement does not require any privilege. It requires only the\nability to connect to the server.\nWith a LIKE clause, the statement displays only rows for those\nvariables with names that match the pattern:\n\nmysql> SHOW STATUS LIKE \'Key%\';\n+--------------------+----------+\n| Variable_name | Value |\n+--------------------+----------+\n| Key_blocks_used | 14955 |\n| Key_read_requests | 96854827 |\n| Key_reads | 162040 |\n| Key_write_requests | 7589728 |\n| Key_writes | 3813196 |\n+--------------------+----------+\n\nWith the GLOBAL modifier, SHOW STATUS displays the status values for\nall connections to MySQL. With SESSION, it displays the status values\nfor the current connection. If no modifier is present, the default is\nSESSION. LOCAL is a synonym for SESSION.\n\nSome status variables have only a global value. For these, you get the\nsame value for both GLOBAL and SESSION. The scope for each status\nvariable is listed at\nhttp://dev.mysql.com/doc/refman/5.1/en/server-status-variables.html.\n\nEach invocation of the SHOW STATUS statement uses an internal temporary\ntable and increments the global Created_tmp_tables value.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-status.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/show-status.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (134,35,'EXTRACTVALUE','Syntax:\nExtractValue(xml_frag, xpath_expr)\n\nExtractValue() takes two string arguments, a fragment of XML markup\nxml_frag and an XPath expression xpath_expr (also known as a locator);\nit returns the text (CDATA) of the first text node which is a child of\nthe element(s) matched by the XPath expression. It is the equivalent of\nperforming a match using the xpath_expr after appending /text(). In\nother words, ExtractValue(\'Sakila\', \'/a/b\') and\nExtractValue(\'Sakila\', \'/a/b/text()\') produce the same\nresult.\n\nIf multiple matches are found, then the content of the first child text\nnode of each matching element is returned (in the order matched) as a\nsingle, space-delimited string.\n\nIf no matching text node is found for the expression (including the\nimplicit /text()) --- for whatever reason, as long as xpath_expr is\nvalid, and xml_frag consists of elements which are properly nested and\nclosed --- an empty string is returned. No distinction is made between\na match on an empty element and no match at all. This is by design.\n\nIf you need to determine whether no matching element was found in\nxml_frag or such an element was found but contained no child text\nnodes, you should test the result of an expression that uses the XPath\ncount() function. For example, both of these statements return an empty\nstring, as shown here:\n\nmysql> SELECT ExtractValue(\'\', \'/a/b\');\n+-------------------------------------+\n| ExtractValue(\'\', \'/a/b\') |\n+-------------------------------------+\n| |\n+-------------------------------------+\n1 row in set (0.00 sec)\n\nmysql> SELECT ExtractValue(\'\', \'/a/b\');\n+-------------------------------------+\n| ExtractValue(\'\', \'/a/b\') |\n+-------------------------------------+\n| |\n+-------------------------------------+\n1 row in set (0.00 sec)\n\nHowever, you can determine whether there was actually a matching\nelement using the following:\n\nmysql> SELECT ExtractValue(\'\', \'count(/a/b)\');\n+-------------------------------------+\n| ExtractValue(\'\', \'count(/a/b)\') |\n+-------------------------------------+\n| 1 |\n+-------------------------------------+\n1 row in set (0.00 sec)\n\nmysql> SELECT ExtractValue(\'\', \'count(/a/b)\');\n+-------------------------------------+\n| ExtractValue(\'\', \'count(/a/b)\') |\n+-------------------------------------+\n| 0 |\n+-------------------------------------+\n1 row in set (0.01 sec)\n\n*Important*: ExtractValue() returns only CDATA, and does not return any\ntags that might be contained within a matching tag, nor any of their\ncontent (see the result returned as val1 in the following example).\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/xml-functions.html\n\n','mysql> SELECT\n -> ExtractValue(\'cccddd\', \'/a\') AS val1,\n -> ExtractValue(\'cccddd\', \'/a/b\') AS val2,\n -> ExtractValue(\'cccddd\', \'//b\') AS val3,\n -> ExtractValue(\'cccddd\', \'/b\') AS val4,\n -> ExtractValue(\'cccdddeee\', \'//b\') AS val5;\n\n+------+------+------+------+---------+\n| val1 | val2 | val3 | val4 | val5 |\n+------+------+------+------+---------+\n| ccc | ddd | ddd | | ddd eee |\n+------+------+------+------+---------+\n','http://dev.mysql.com/doc/refman/5.1/en/xml-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (135,11,'OLD_PASSWORD','Syntax:\nOLD_PASSWORD(str)\n\nOLD_PASSWORD() was added to MySQL when the implementation of PASSWORD()\nwas changed to improve security. OLD_PASSWORD() returns the value of\nthe old (pre-4.1) implementation of PASSWORD() as a binary string, and\nis intended to permit you to reset passwords for any pre-4.1 clients\nthat need to connect to your version 5.1 MySQL server without locking\nthem out. See\nhttp://dev.mysql.com/doc/refman/5.1/en/password-hashing.html.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/encryption-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/encryption-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (136,22,'SET VARIABLE','Syntax:\nSET var_name = expr [, var_name = expr] ...\n\nThe SET statement in stored programs is an extended version of the\ngeneral SET statement (see [HELP SET]). Each var_name may refer to a\nlocal variable declared inside a stored program, a system variable, or\na user-defined variable.\n\nThe SET statement in stored programs is implemented as part of the\npre-existing SET syntax. This allows an extended syntax of SET a=x,\nb=y, ... where different variable types (locally declared variables,\nglobal and session system variables, user-defined variables) can be\nmixed. This also allows combinations of local variables and some\noptions that make sense only for system variables; in that case, the\noptions are recognized but ignored.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/set-statement.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/set-statement.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (137,35,'FORMAT','Syntax:\nFORMAT(X,D)\n\nFormats the number X to a format like \'#,###,###.##\', rounded to D\ndecimal places, and returns the result as a string. If D is 0, the\nresult has no decimal point or fractional part.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','mysql> SELECT FORMAT(12332.123456, 4);\n -> \'12,332.1235\'\nmysql> SELECT FORMAT(12332.1,4);\n -> \'12,332.1000\'\nmysql> SELECT FORMAT(12332.2,0);\n -> \'12,332\'\n','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (138,13,'||','Syntax:\nOR, ||\n\nLogical OR. When both operands are non-NULL, the result is 1 if any\noperand is nonzero, and 0 otherwise. With a NULL operand, the result is\n1 if the other operand is nonzero, and NULL otherwise. If both operands\nare NULL, the result is NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/logical-operators.html\n\n','mysql> SELECT 1 || 1;\n -> 1\nmysql> SELECT 1 || 0;\n -> 1\nmysql> SELECT 0 || 0;\n -> 0\nmysql> SELECT 0 || NULL;\n -> NULL\nmysql> SELECT 1 || NULL;\n -> 1\n','http://dev.mysql.com/doc/refman/5.1/en/logical-operators.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (139,35,'BIT_LENGTH','Syntax:\nBIT_LENGTH(str)\n\nReturns the length of the string str in bits.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','mysql> SELECT BIT_LENGTH(\'text\');\n -> 32\n','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (140,2,'EXTERIORRING','ExteriorRing(poly)\n\nReturns the exterior ring of the Polygon value poly as a LineString.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#polygon-property-functions\n\n','mysql> SET @poly =\n -> \'Polygon((0 0,0 3,3 3,3 0,0 0),(1 1,1 2,2 2,2 1,1 1))\';\nmysql> SELECT AsText(ExteriorRing(GeomFromText(@poly)));\n+-------------------------------------------+\n| AsText(ExteriorRing(GeomFromText(@poly))) |\n+-------------------------------------------+\n| LINESTRING(0 0,0 3,3 3,3 0,0 0) |\n+-------------------------------------------+\n','http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#polygon-property-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (141,31,'GEOMFROMWKB','GeomFromWKB(wkb[,srid]), GeometryFromWKB(wkb[,srid])\n\nConstructs a geometry value of any type using its WKB representation\nand SRID.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-wkb-functions\n\n','','http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-wkb-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (142,25,'SHOW SLAVE HOSTS','Syntax:\nSHOW SLAVE HOSTS\n\nDisplays a list of replication slaves currently registered with the\nmaster. Only slaves started with the --report-host=host_name option are\nvisible in this list.\n\nThe list is displayed on any server (not just the master server). The\noutput looks like this:\n\nmysql> SHOW SLAVE HOSTS;\n+------------+-----------+------+-----------+\n| Server_id | Host | Port | Master_id |\n+------------+-----------+------+-----------+\n| 192168010 | iconnect2 | 3306 | 192168011 |\n| 1921680101 | athena | 3306 | 192168011 |\n+------------+-----------+------+-----------+\n\no Server_id: The unique server ID of the slave server, as configured in\n the server\'s option file, or on the command line with\n --server-id=value.\n\no Host: The host name of the slave server, as configured in the\n server\'s option file, or on the command line with\n --report-host=host_name. Note that this can differ from the machine\n name as configured in the operating system.\n\no Port: The port the slave server is listening on.\n\no Master_id: The unique server ID of the master server that the slave\n server is replicating from.\n\nSome MySQL versions report another variable, Rpl_recovery_rank. This\nvariable was never used, and was eventually removed.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-slave-hosts.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/show-slave-hosts.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (143,8,'START TRANSACTION','Syntax:\nSTART TRANSACTION [WITH CONSISTENT SNAPSHOT] | BEGIN [WORK]\nCOMMIT [WORK] [AND [NO] CHAIN] [[NO] RELEASE]\nROLLBACK [WORK] [AND [NO] CHAIN] [[NO] RELEASE]\nSET autocommit = {0 | 1}\n\nThe START TRANSACTION or BEGIN statement begins a new transaction.\nCOMMIT commits the current transaction, making its changes permanent.\nROLLBACK rolls back the current transaction, canceling its changes. The\nSET autocommit statement disables or enables the default autocommit\nmode for the current session.\n\nThe optional WORK keyword is supported for COMMIT and ROLLBACK, as are\nthe CHAIN and RELEASE clauses. CHAIN and RELEASE can be used for\nadditional control over transaction completion. The value of the\ncompletion_type system variable determines the default completion\nbehavior. See\nhttp://dev.mysql.com/doc/refman/5.1/en/server-system-variables.html.\n\n*Note*: Within all stored programs (stored procedures and functions,\ntriggers, and events), the parser treats BEGIN [WORK] as the beginning\nof a BEGIN ... END block. Begin a transaction in this context with\nSTART TRANSACTION instead.\n\nThe AND CHAIN clause causes a new transaction to begin as soon as the\ncurrent one ends, and the new transaction has the same isolation level\nas the just-terminated transaction. The RELEASE clause causes the\nserver to disconnect the current client session after terminating the\ncurrent transaction. Including the NO keyword suppresses CHAIN or\nRELEASE completion, which can be useful if the completion_type system\nvariable is set to cause chaining or release completion by default.\n\nBy default, MySQL runs with autocommit mode enabled. This means that as\nsoon as you execute a statement that updates (modifies) a table, MySQL\nstores the update on disk to make it permanent. To disable autocommit\nmode, use the following statement:\n\nSET autocommit=0;\n\nAfter disabling autocommit mode by setting the autocommit variable to\nzero, changes to transaction-safe tables (such as those for InnoDB or\nNDBCLUSTER) are not made permanent immediately. You must use COMMIT to\nstore your changes to disk or ROLLBACK to ignore the changes.\n\nTo disable autocommit mode for a single series of statements, use the\nSTART TRANSACTION statement:\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/commit.html\n\n','START TRANSACTION;\nSELECT @A:=SUM(salary) FROM table1 WHERE type=1;\nUPDATE table2 SET summary=@A WHERE type=1;\nCOMMIT;\n','http://dev.mysql.com/doc/refman/5.1/en/commit.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (144,17,'BETWEEN AND','Syntax:\nexpr BETWEEN min AND max\n\nIf expr is greater than or equal to min and expr is less than or equal\nto max, BETWEEN returns 1, otherwise it returns 0. This is equivalent\nto the expression (min <= expr AND expr <= max) if all the arguments\nare of the same type. Otherwise type conversion takes place according\nto the rules described in\nhttp://dev.mysql.com/doc/refman/5.1/en/type-conversion.html, but\napplied to all the three arguments.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html\n\n','mysql> SELECT 2 BETWEEN 1 AND 3, 2 BETWEEN 3 and 1;\n -> 1, 0\nmysql> SELECT 1 BETWEEN 2 AND 3;\n -> 0\nmysql> SELECT \'b\' BETWEEN \'a\' AND \'c\';\n -> 1\nmysql> SELECT 2 BETWEEN 2 AND \'3\';\n -> 1\nmysql> SELECT 2 BETWEEN 2 AND \'x-3\';\n -> 0\n','http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (145,23,'MULTIPOLYGON','MultiPolygon(poly1,poly2,...)\n\nConstructs a MultiPolygon value from a set of Polygon or WKB Polygon\narguments.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-mysql-specific-functions\n\n','','http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-mysql-specific-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (146,30,'TIME_FORMAT','Syntax:\nTIME_FORMAT(time,format)\n\nThis is used like the DATE_FORMAT() function, but the format string may\ncontain format specifiers only for hours, minutes, seconds, and\nmicroseconds. Other specifiers produce a NULL value or 0.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT TIME_FORMAT(\'100:00:00\', \'%H %k %h %I %l\');\n -> \'100 100 04 04 4\'\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (147,35,'LEFT','Syntax:\nLEFT(str,len)\n\nReturns the leftmost len characters from the string str, or NULL if any\nargument is NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','mysql> SELECT LEFT(\'foobarbar\', 5);\n -> \'fooba\'\n','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (148,25,'FLUSH QUERY CACHE','You can defragment the query cache to better utilize its memory with\nthe FLUSH QUERY CACHE statement. The statement does not remove any\nqueries from the cache.\n\nThe RESET QUERY CACHE statement removes all query results from the\nquery cache. The FLUSH TABLES statement also does this.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/query-cache-status-and-maintenance.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/query-cache-status-and-maintenance.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (149,20,'SET DATA TYPE','SET(\'value1\',\'value2\',...) [CHARACTER SET charset_name] [COLLATE\ncollation_name]\n\nA set. A string object that can have zero or more values, each of which\nmust be chosen from the list of values \'value1\', \'value2\', ... A SET\ncolumn can have a maximum of 64 members. SET values are represented\ninternally as integers.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/string-type-overview.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (150,4,'RAND','Syntax:\nRAND(), RAND(N)\n\nReturns a random floating-point value v in the range 0 <= v < 1.0. If a\nconstant integer argument N is specified, it is used as the seed value,\nwhich produces a repeatable sequence of column values. In the following\nexample, note that the sequences of values produced by RAND(3) is the\nsame both places where it occurs.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html\n\n','mysql> CREATE TABLE t (i INT);\nQuery OK, 0 rows affected (0.42 sec)\n\nmysql> INSERT INTO t VALUES(1),(2),(3);\nQuery OK, 3 rows affected (0.00 sec)\nRecords: 3 Duplicates: 0 Warnings: 0\n\nmysql> SELECT i, RAND() FROM t;\n+------+------------------+\n| i | RAND() |\n+------+------------------+\n| 1 | 0.61914388706828 |\n| 2 | 0.93845168309142 |\n| 3 | 0.83482678498591 |\n+------+------------------+\n3 rows in set (0.00 sec)\n\nmysql> SELECT i, RAND(3) FROM t;\n+------+------------------+\n| i | RAND(3) |\n+------+------------------+\n| 1 | 0.90576975597606 |\n| 2 | 0.37307905813035 |\n| 3 | 0.14808605345719 |\n+------+------------------+\n3 rows in set (0.00 sec)\n\nmysql> SELECT i, RAND() FROM t;\n+------+------------------+\n| i | RAND() |\n+------+------------------+\n| 1 | 0.35877890638893 |\n| 2 | 0.28941420772058 |\n| 3 | 0.37073435016976 |\n+------+------------------+\n3 rows in set (0.00 sec)\n\nmysql> SELECT i, RAND(3) FROM t;\n+------+------------------+\n| i | RAND(3) |\n+------+------------------+\n| 1 | 0.90576975597606 |\n| 2 | 0.37307905813035 |\n| 3 | 0.14808605345719 |\n+------+------------------+\n3 rows in set (0.01 sec)\n','http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (151,35,'RPAD','Syntax:\nRPAD(str,len,padstr)\n\nReturns the string str, right-padded with the string padstr to a length\nof len characters. If str is longer than len, the return value is\nshortened to len characters.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','mysql> SELECT RPAD(\'hi\',5,\'?\');\n -> \'hi???\'\nmysql> SELECT RPAD(\'hi\',1,\'?\');\n -> \'h\'\n','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (152,37,'CREATE DATABASE','Syntax:\nCREATE {DATABASE | SCHEMA} [IF NOT EXISTS] db_name\n [create_specification] ...\n\ncreate_specification:\n [DEFAULT] CHARACTER SET [=] charset_name\n | [DEFAULT] COLLATE [=] collation_name\n\nCREATE DATABASE creates a database with the given name. To use this\nstatement, you need the CREATE privilege for the database. CREATE\nSCHEMA is a synonym for CREATE DATABASE.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/create-database.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/create-database.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (153,20,'DEC','DEC[(M[,D])] [UNSIGNED] [ZEROFILL], NUMERIC[(M[,D])] [UNSIGNED]\n[ZEROFILL], FIXED[(M[,D])] [UNSIGNED] [ZEROFILL]\n\nThese types are synonyms for DECIMAL. The FIXED synonym is available\nfor compatibility with other database systems.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/numeric-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/numeric-type-overview.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (154,16,'VAR_POP','Syntax:\nVAR_POP(expr)\n\nReturns the population standard variance of expr. It considers rows as\nthe whole population, not as a sample, so it has the number of rows as\nthe denominator. You can also use VARIANCE(), which is equivalent but\nis not standard SQL.\n\nVAR_POP() returns NULL if there were no matching rows.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/group-by-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/group-by-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (155,35,'ELT','Syntax:\nELT(N,str1,str2,str3,...)\n\nReturns str1 if N = 1, str2 if N = 2, and so on. Returns NULL if N is\nless than 1 or greater than the number of arguments. ELT() is the\ncomplement of FIELD().\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','mysql> SELECT ELT(1, \'ej\', \'Heja\', \'hej\', \'foo\');\n -> \'ej\'\nmysql> SELECT ELT(4, \'ej\', \'Heja\', \'hej\', \'foo\');\n -> \'foo\'\n','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (156,37,'ALTER VIEW','Syntax:\nALTER\n [ALGORITHM = {UNDEFINED | MERGE | TEMPTABLE}]\n [DEFINER = { user | CURRENT_USER }]\n [SQL SECURITY { DEFINER | INVOKER }]\n VIEW view_name [(column_list)]\n AS select_statement\n [WITH [CASCADED | LOCAL] CHECK OPTION]\n\nThis statement changes the definition of a view, which must exist. The\nsyntax is similar to that for CREATE VIEW and the effect is the same as\nfor CREATE OR REPLACE VIEW. See [HELP CREATE VIEW]. This statement\nrequires the CREATE VIEW and DROP privileges for the view, and some\nprivilege for each column referred to in the SELECT statement. As of\nMySQL 5.1.23, ALTER VIEW is allowed only to the definer or users with\nthe SUPER privilege.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/alter-view.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/alter-view.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (157,25,'SHOW DATABASES','Syntax:\nSHOW {DATABASES | SCHEMAS}\n [LIKE \'pattern\' | WHERE expr]\n\nSHOW DATABASES lists the databases on the MySQL server host. SHOW\nSCHEMAS is a synonym for SHOW DATABASES. The LIKE clause, if present,\nindicates which database names to match. The WHERE clause can be given\nto select rows using more general conditions, as discussed in\nhttp://dev.mysql.com/doc/refman/5.1/en/extended-show.html.\n\nYou see only those databases for which you have some kind of privilege,\nunless you have the global SHOW DATABASES privilege. You can also get\nthis list using the mysqlshow command.\n\nIf the server was started with the --skip-show-database option, you\ncannot use this statement at all unless you have the SHOW DATABASES\nprivilege.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-databases.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/show-databases.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (158,18,'~','Syntax:\n~\n\nInvert all bits.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/bit-functions.html\n\n','mysql> SELECT 5 & ~1;\n -> 4\n','http://dev.mysql.com/doc/refman/5.1/en/bit-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (159,20,'TEXT','TEXT[(M)] [CHARACTER SET charset_name] [COLLATE collation_name]\n\nA TEXT column with a maximum length of 65,535 (216 - 1) characters. The\neffective maximum length is less if the value contains multi-byte\ncharacters. Each TEXT value is stored using a two-byte length prefix\nthat indicates the number of bytes in the value.\n\nAn optional length M can be given for this type. If this is done, MySQL\ncreates the column as the smallest TEXT type large enough to hold\nvalues M characters long.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/string-type-overview.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (160,35,'CONCAT_WS','Syntax:\nCONCAT_WS(separator,str1,str2,...)\n\nCONCAT_WS() stands for Concatenate With Separator and is a special form\nof CONCAT(). The first argument is the separator for the rest of the\narguments. The separator is added between the strings to be\nconcatenated. The separator can be a string, as can the rest of the\narguments. If the separator is NULL, the result is NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','mysql> SELECT CONCAT_WS(\',\',\'First name\',\'Second name\',\'Last Name\');\n -> \'First name,Second name,Last Name\'\nmysql> SELECT CONCAT_WS(\',\',\'First name\',NULL,\'Last Name\');\n -> \'First name,Last Name\'\n','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (161,15,'ROW_COUNT','Syntax:\nROW_COUNT()\n\nROW_COUNT() returns the number of rows updated, inserted, or deleted by\nthe preceding statement. This is the same as the row count that the\nmysql client displays and the value from the mysql_affected_rows() C\nAPI function.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/information-functions.html\n\n','mysql> INSERT INTO t VALUES(1),(2),(3);\nQuery OK, 3 rows affected (0.00 sec)\nRecords: 3 Duplicates: 0 Warnings: 0\n\nmysql> SELECT ROW_COUNT();\n+-------------+\n| ROW_COUNT() |\n+-------------+\n| 3 |\n+-------------+\n1 row in set (0.00 sec)\n\nmysql> DELETE FROM t WHERE i IN(1,2);\nQuery OK, 2 rows affected (0.00 sec)\n\nmysql> SELECT ROW_COUNT();\n+-------------+\n| ROW_COUNT() |\n+-------------+\n| 2 |\n+-------------+\n1 row in set (0.00 sec)\n','http://dev.mysql.com/doc/refman/5.1/en/information-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (162,4,'ASIN','Syntax:\nASIN(X)\n\nReturns the arc sine of X, that is, the value whose sine is X. Returns\nNULL if X is not in the range -1 to 1.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html\n\n','mysql> SELECT ASIN(0.2);\n -> 0.20135792079033\nmysql> SELECT ASIN(\'foo\');\n\n+-------------+\n| ASIN(\'foo\') |\n+-------------+\n| 0 |\n+-------------+\n1 row in set, 1 warning (0.00 sec)\n\nmysql> SHOW WARNINGS;\n+---------+------+-----------------------------------------+\n| Level | Code | Message |\n+---------+------+-----------------------------------------+\n| Warning | 1292 | Truncated incorrect DOUBLE value: \'foo\' |\n+---------+------+-----------------------------------------+\n','http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (163,4,'SIGN','Syntax:\nSIGN(X)\n\nReturns the sign of the argument as -1, 0, or 1, depending on whether X\nis negative, zero, or positive.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html\n\n','mysql> SELECT SIGN(-32);\n -> -1\nmysql> SELECT SIGN(0);\n -> 0\nmysql> SELECT SIGN(234);\n -> 1\n','http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (164,30,'SEC_TO_TIME','Syntax:\nSEC_TO_TIME(seconds)\n\nReturns the seconds argument, converted to hours, minutes, and seconds,\nas a TIME value. The range of the result is constrained to that of the\nTIME data type. A warning occurs if the argument corresponds to a value\noutside that range.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT SEC_TO_TIME(2378);\n -> \'00:39:38\'\nmysql> SELECT SEC_TO_TIME(2378) + 0;\n -> 3938\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (165,20,'FLOAT','FLOAT[(M,D)] [UNSIGNED] [ZEROFILL]\n\nA small (single-precision) floating-point number. Allowable values are\n-3.402823466E+38 to -1.175494351E-38, 0, and 1.175494351E-38 to\n3.402823466E+38. These are the theoretical limits, based on the IEEE\nstandard. The actual range might be slightly smaller depending on your\nhardware or operating system.\n\nM is the total number of digits and D is the number of digits following\nthe decimal point. If M and D are omitted, values are stored to the\nlimits allowed by the hardware. A single-precision floating-point\nnumber is accurate to approximately 7 decimal places.\n\nUNSIGNED, if specified, disallows negative values.\n\nUsing FLOAT might give you some unexpected problems because all\ncalculations in MySQL are done with double precision. See\nhttp://dev.mysql.com/doc/refman/5.1/en/no-matching-rows.html.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/numeric-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/numeric-type-overview.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (166,35,'LOCATE','Syntax:\nLOCATE(substr,str), LOCATE(substr,str,pos)\n\nThe first syntax returns the position of the first occurrence of\nsubstring substr in string str. The second syntax returns the position\nof the first occurrence of substring substr in string str, starting at\nposition pos. Returns 0 if substr is not in str.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','mysql> SELECT LOCATE(\'bar\', \'foobarbar\');\n -> 4\nmysql> SELECT LOCATE(\'xbar\', \'foobar\');\n -> 0\nmysql> SELECT LOCATE(\'bar\', \'foobarbar\', 5);\n -> 7\n','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (167,25,'SHOW EVENTS','Syntax:\nSHOW EVENTS [{FROM | IN} schema_name]\n [LIKE \'pattern\' | WHERE expr]\n\nIn its simplest form, SHOW EVENTS lists all of the events in the\ncurrent schema:\n\nmysql> SELECT CURRENT_USER(), SCHEMA();\n+----------------+----------+\n| CURRENT_USER() | SCHEMA() |\n+----------------+----------+\n| jon@ghidora | myschema |\n+----------------+----------+\n1 row in set (0.00 sec)\n\nmysql> SHOW EVENTS\\G\n*************************** 1. row ***************************\n Db: myschema\n Name: e_daily\n Definer: jon@ghidora\n Time zone: SYSTEM\n Type: RECURRING\n Execute at: NULL\n Interval value: 10\n Interval field: SECOND\n Starts: 2006-02-09 10:41:23\n Ends: NULL\n Status: ENABLED\n Originator: 0\ncharacter_set_client: latin1\ncollation_connection: latin1_swedish_ci\n Database Collation: latin1_swedish_ci\n\nTo see events for a specific schema, use the FROM clause. For example,\nto see events for the test schema, use the following statement:\n\nSHOW EVENTS FROM test;\n\nThe LIKE clause, if present, indicates which event names to match. The\nWHERE clause can be given to select rows using more general conditions,\nas discussed in\nhttp://dev.mysql.com/doc/refman/5.1/en/extended-show.html.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-events.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/show-events.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (168,15,'CHARSET','Syntax:\nCHARSET(str)\n\nReturns the character set of the string argument.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/information-functions.html\n\n','mysql> SELECT CHARSET(\'abc\');\n -> \'latin1\'\nmysql> SELECT CHARSET(CONVERT(\'abc\' USING utf8));\n -> \'utf8\'\nmysql> SELECT CHARSET(USER());\n -> \'utf8\'\n','http://dev.mysql.com/doc/refman/5.1/en/information-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (169,30,'SUBDATE','Syntax:\nSUBDATE(date,INTERVAL expr unit), SUBDATE(expr,days)\n\nWhen invoked with the INTERVAL form of the second argument, SUBDATE()\nis a synonym for DATE_SUB(). For information on the INTERVAL unit\nargument, see the discussion for DATE_ADD().\n\nmysql> SELECT DATE_SUB(\'2008-01-02\', INTERVAL 31 DAY);\n -> \'2007-12-02\'\nmysql> SELECT SUBDATE(\'2008-01-02\', INTERVAL 31 DAY);\n -> \'2007-12-02\'\n\nThe second form allows the use of an integer value for days. In such\ncases, it is interpreted as the number of days to be subtracted from\nthe date or datetime expression expr.\n\nmysql> SELECT SUBDATE(\'2008-01-02 12:00:00\', 31);\n -> \'2007-12-02 12:00:00\'\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (170,30,'DAYOFYEAR','Syntax:\nDAYOFYEAR(date)\n\nReturns the day of the year for date, in the range 1 to 366.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT DAYOFYEAR(\'2007-02-03\');\n -> 34\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (171,20,'LONGTEXT','LONGTEXT [CHARACTER SET charset_name] [COLLATE collation_name]\n\nA TEXT column with a maximum length of 4,294,967,295 or 4GB (232 - 1)\ncharacters. The effective maximum length is less if the value contains\nmulti-byte characters. The effective maximum length of LONGTEXT columns\nalso depends on the configured maximum packet size in the client/server\nprotocol and available memory. Each LONGTEXT value is stored using a\nfour-byte length prefix that indicates the number of bytes in the\nvalue.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/string-type-overview.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (172,4,'%','Syntax:\nN % M\n\nModulo operation. Returns the remainder of N divided by M. For more\ninformation, see the description for the MOD() function in\nhttp://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/arithmetic-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/arithmetic-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (173,25,'KILL','Syntax:\nKILL [CONNECTION | QUERY] thread_id\n\nEach connection to mysqld runs in a separate thread. You can see which\nthreads are running with the SHOW PROCESSLIST statement and kill a\nthread with the KILL thread_id statement.\n\nKILL allows the optional CONNECTION or QUERY modifier:\n\no KILL CONNECTION is the same as KILL with no modifier: It terminates\n the connection associated with the given thread_id.\n\no KILL QUERY terminates the statement that the connection is currently\n executing, but leaves the connection itself intact.\n\nIf you have the PROCESS privilege, you can see all threads. If you have\nthe SUPER privilege, you can kill all threads and statements.\nOtherwise, you can see and kill only your own threads and statements.\n\nYou can also use the mysqladmin processlist and mysqladmin kill\ncommands to examine and kill threads.\n\n*Note*: You cannot use KILL with the Embedded MySQL Server library\nbecause the embedded server merely runs inside the threads of the host\napplication. It does not create any connection threads of its own.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/kill.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/kill.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (174,29,'DISJOINT','Disjoint(g1,g2)\n\nReturns 1 or 0 to indicate whether g1 is spatially disjoint from (does\nnot intersect) g2.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/functions-that-test-spatial-relationships-between-geometries.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/functions-that-test-spatial-relationships-between-geometries.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (175,3,'ASTEXT','AsText(g), AsWKT(g)\n\nConverts a value in internal geometry format to its WKT representation\nand returns the string result.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/functions-to-convert-geometries-between-formats.html\n\n','mysql> SET @g = \'LineString(1 1,2 2,3 3)\';\nmysql> SELECT AsText(GeomFromText(@g));\n+--------------------------+\n| AsText(GeomFromText(@g)) |\n+--------------------------+\n| LINESTRING(1 1,2 2,3 3) |\n+--------------------------+\n','http://dev.mysql.com/doc/refman/5.1/en/functions-to-convert-geometries-between-formats.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (176,35,'LPAD','Syntax:\nLPAD(str,len,padstr)\n\nReturns the string str, left-padded with the string padstr to a length\nof len characters. If str is longer than len, the return value is\nshortened to len characters.\n\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','mysql> SELECT LPAD(\'hi\',4,\'??\');\n -> \'??hi\'\nmysql> SELECT LPAD(\'hi\',1,\'??\');\n -> \'h\'\n','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (177,19,'RESTORE TABLE','Syntax:\nRESTORE TABLE tbl_name [, tbl_name] ... FROM \'/path/to/backup/directory\'\n\n*Note*: This statement is deprecated and is removed in MySQL 5.5.\n\nRESTORE TABLE restores the table or tables from a backup that was made\nwith BACKUP TABLE. The directory should be specified as a full path\nname.\n\nExisting tables are not overwritten; if you try to restore over an\nexisting table, an error occurs. Just as for BACKUP TABLE, RESTORE\nTABLE currently works only for MyISAM tables. Restored tables are not\nreplicated from master to slave.\n\nThe backup for each table consists of its .frm format file and .MYD\ndata file. The restore operation restores those files, and then uses\nthem to rebuild the .MYI index file. Restoring takes longer than\nbacking up due to the need to rebuild the indexes. The more indexes the\ntable has, the longer it takes.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/restore-table.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/restore-table.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (178,22,'DECLARE CONDITION','Syntax:\nDECLARE condition_name CONDITION FOR condition_value\n\ncondition_value:\n SQLSTATE [VALUE] sqlstate_value\n | mysql_error_code\n\nThe DECLARE ... CONDITION statement defines a named error condition. It\nspecifies a condition that needs specific handling and associates a\nname with that condition. The name can be referred to in a subsequent\nDECLARE ... HANDLER statement. For an example, see [HELP DECLARE\nHANDLER].\n\nA condition_value for DECLARE ... CONDITION can be an SQLSTATE value (a\n5-character string literal) or a MySQL error code (a number). You\nshould not use SQLSTATE value \'00000\' or MySQL error code 0, because\nthose indicate success rather than an error condition. For a list of\nSQLSTATE values and MySQL error codes, see\nhttp://dev.mysql.com/doc/refman/5.1/en/error-messages-server.html.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/declare-condition.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/declare-condition.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (179,29,'OVERLAPS','Overlaps(g1,g2)\n\nReturns 1 or 0 to indicate whether g1 spatially overlaps g2. The term\nspatially overlaps is used if two geometries intersect and their\nintersection results in a geometry of the same dimension but not equal\nto either of the given geometries.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/functions-that-test-spatial-relationships-between-geometries.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/functions-that-test-spatial-relationships-between-geometries.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (180,25,'SET GLOBAL SQL_SLAVE_SKIP_COUNTER','Syntax:\nSET GLOBAL sql_slave_skip_counter = N\n\nThis statement skips the next N events from the master. This is useful\nfor recovering from replication stops caused by a statement.\n\nThis statement is valid only when the slave threads are not running.\nOtherwise, it produces an error.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/set-global-sql-slave-skip-counter.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/set-global-sql-slave-skip-counter.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (181,24,'NUMGEOMETRIES','NumGeometries(gc)\n\nReturns the number of geometries in the GeometryCollection value gc.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#geometrycollection-property-functions\n\n','mysql> SET @gc = \'GeometryCollection(Point(1 1),LineString(2 2, 3 3))\';\nmysql> SELECT NumGeometries(GeomFromText(@gc));\n+----------------------------------+\n| NumGeometries(GeomFromText(@gc)) |\n+----------------------------------+\n| 2 |\n+----------------------------------+\n','http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#geometrycollection-property-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (182,30,'MONTHNAME','Syntax:\nMONTHNAME(date)\n\nReturns the full name of the month for date. As of MySQL 5.1.12, the\nlanguage used for the name is controlled by the value of the\nlc_time_names system variable\n(http://dev.mysql.com/doc/refman/5.1/en/locale-support.html).\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT MONTHNAME(\'2008-02-03\');\n -> \'February\'\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (183,36,'PROCEDURE ANALYSE','Syntax:\nANALYSE([max_elements[,max_memory]])\n\nANALYSE() is defined in the sql/sql_analyse.cc source file, which\nserves as an example of how to create a procedure for use with the\nPROCEDURE clause of SELECT statements. ANALYSE() is built in and is\navailable by default; other procedures can be created using the format\ndemonstrated in the source file.\n\nANALYSE() examines the result from a query and returns an analysis of\nthe results that suggests optimal data types for each column that may\nhelp reduce table sizes. To obtain this analysis, append PROCEDURE\nANALYSE to the end of a SELECT statement:\n\nSELECT ... FROM ... WHERE ... PROCEDURE ANALYSE([max_elements,[max_memory]])\n\nFor example:\n\nSELECT col1, col2 FROM table1 PROCEDURE ANALYSE(10, 2000);\n\nThe results show some statistics for the values returned by the query,\nand propose an optimal data type for the columns. This can be helpful\nfor checking your existing tables, or after importing new data. You may\nneed to try different settings for the arguments so that PROCEDURE\nANALYSE() does not suggest the ENUM data type when it is not\nappropriate.\n\nThe arguments are optional and are used as follows:\n\no max_elements (default 256) is the maximum number of distinct values\n that ANALYSE() notices per column. This is used by ANALYSE() to check\n whether the optimal data type should be of type ENUM; if there are\n more than max_elements distinct values, then ENUM is not a suggested\n type.\n\no max_memory (default 8192) is the maximum amount of memory that\n ANALYSE() should allocate per column while trying to find all\n distinct values.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/procedure-analyse.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/procedure-analyse.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (184,25,'CHANGE MASTER TO','Syntax:\nCHANGE MASTER TO option [, option] ...\n\noption:\n MASTER_BIND = \'interface_name\'\n | MASTER_HOST = \'host_name\'\n | MASTER_USER = \'user_name\'\n | MASTER_PASSWORD = \'password\'\n | MASTER_PORT = port_num\n | MASTER_CONNECT_RETRY = interval\n | MASTER_HEARTBEAT_PERIOD = interval\n | MASTER_LOG_FILE = \'master_log_name\'\n | MASTER_LOG_POS = master_log_pos\n | RELAY_LOG_FILE = \'relay_log_name\'\n | RELAY_LOG_POS = relay_log_pos\n | MASTER_SSL = {0|1}\n | MASTER_SSL_CA = \'ca_file_name\'\n | MASTER_SSL_CAPATH = \'ca_directory_name\'\n | MASTER_SSL_CERT = \'cert_file_name\'\n | MASTER_SSL_KEY = \'key_file_name\'\n | MASTER_SSL_CIPHER = \'cipher_list\'\n | MASTER_SSL_VERIFY_SERVER_CERT = {0|1}\n\nCHANGE MASTER TO changes the parameters that the slave server uses for\nconnecting to the master server, for reading the master binary log, and\nreading the slave relay log. It also updates the contents of the\nmaster.info and relay-log.info files. To use CHANGE MASTER TO, the\nslave replication threads must be stopped (use STOP SLAVE if\nnecessary).\n\nOptions not specified retain their value, except as indicated in the\nfollowing discussion. Thus, in most cases, there is no need to specify\noptions that do not change. For example, if the password to connect to\nyour MySQL master has changed, you just need to issue these statements\nto tell the slave about the new password:\n\nSTOP SLAVE; -- if replication was running\nCHANGE MASTER TO MASTER_PASSWORD=\'new3cret\';\nSTART SLAVE; -- if you want to restart replication\n\nMASTER_HOST, MASTER_USER, MASTER_PASSWORD, and MASTER_PORT provide\ninformation to the slave about how to connect to its master:\n\no MASTER_HOST and MASTER_PORT are the host name (or IP address) of the\n master host and its TCP/IP port.\n\n *Note*: Replication cannot use Unix socket files. You must be able to\n connect to the master MySQL server using TCP/IP.\n\n If you specify the MASTER_HOST or MASTER_PORT option, the slave\n assumes that the master server is different from before (even if the\n option value is the same as its current value.) In this case, the old\n values for the master binary log file name and position are\n considered no longer applicable, so if you do not specify\n MASTER_LOG_FILE and MASTER_LOG_POS in the statement,\n MASTER_LOG_FILE=\'\' and MASTER_LOG_POS=4 are silently appended to it.\n\n Setting MASTER_HOST=\'\' (that is, setting its value explicitly to an\n empty string) is not the same as not setting MASTER_HOST at all.\n Setting this option to an empty string causes START SLAVE\n subsequently to fail. This issue is addressed in MySQL 5.5.\n (Bug#28796 (http://bugs.mysql.com/bug.php?id=28796))\n\no MASTER_USER and MASTER_PASSWORD are the user name and password of the\n account to use for connecting to the master.\n\nThe MASTER_SSL_xxx options provide information about using SSL for the\nconnection. They correspond to the --ssl-xxx options described in\nhttp://dev.mysql.com/doc/refman/5.1/en/ssl-options.html, and\nhttp://dev.mysql.com/doc/refman/5.1/en/replication-solutions-ssl.html.\nMASTER_SSL_VERIFY_SERVER_CERT was added in MySQL 5.1.18. These options\ncan be changed even on slaves that are compiled without SSL support.\nThey are saved to the master.info file, but are ignored if the slave\ndoes not have SSL support enabled.\n\nMASTER_CONNECT_RETRY specifies how many seconds to wait between connect\nretries. The default is 60. The number of reconnection attempts is\nlimited by the --master-retry-count server option; for more\ninformation, see\nhttp://dev.mysql.com/doc/refman/5.1/en/replication-options.html.\n\nThe next two options (MASTER_BIND and MASTER_HEARTBEAT_PERIOD) are\navailable in MySQL Cluster NDB 6.3 and later, but are not supported in\nmainline MySQL 5.1:\n\nMASTER_BIND is for use on replication slaves having multiple network\ninterfaces, and determines which of the slave\'s network interfaces is\nchosen for connecting to the master. It is also possible to determine\nwhich network interface is to be used in such cases by starting the\nslave mysqld process with the --master-bind option.\n\nThe ability to bind a replication slave to specific network interface\nwas added in MySQL Cluster NDB 6.3.4.\n\nMASTER_HEARTBEAT_PERIOD is used to set the interval in seconds between\nreplication heartbeats. Whenever the master\'s binary log is updated\nwith an event, the waiting period for the next heartbeat is reset.\ninterval is a decimal value having the range 0 to 4294967 seconds and a\nresolution to hundredths of a second; the smallest nonzero value is\n0.01. Heartbeats are sent by the master only if there are no unsent\nevents in the binary log file for a period longer than interval.\n\nSetting interval to 0 disables heartbeats altogether. The default value\nfor interval is equal to the value of slave_net_timeout divided by 2.\n\nSetting @@global.slave_net_timeout to a value less than that of the\ncurrent heartbeat interval results in a warning being issued. The\neffect of issuing RESET SLAVE on the heartbeat interval is to reset it\nto the default value.\n\nMASTER_HEARTBEAT_PERIOD was added in MySQL Cluster NDB 6.3.4.\n\nMASTER_LOG_FILE and MASTER_LOG_POS are the coordinates at which the\nslave I/O thread should begin reading from the master the next time the\nthread starts. RELAY_LOG_FILE and RELAY_LOG_POS are the coordinates at\nwhich the slave SQL thread should begin reading from the relay log the\nnext time the thread starts. If you specify either of MASTER_LOG_FILE\nor MASTER_LOG_POS, you cannot specify RELAY_LOG_FILE or RELAY_LOG_POS.\nIf neither of MASTER_LOG_FILE or MASTER_LOG_POS is specified, the slave\nuses the last coordinates of the slave SQL thread before CHANGE MASTER\nTO was issued. This ensures that there is no discontinuity in\nreplication, even if the slave SQL thread was late compared to the\nslave I/O thread, when you merely want to change, say, the password to\nuse.\n\nCHANGE MASTER TO deletes all relay log files and starts a new one,\nunless you specify RELAY_LOG_FILE or RELAY_LOG_POS. In that case, relay\nlog files are kept; the relay_log_purge global variable is set silently\nto 0.\n\nCHANGE MASTER TO is useful for setting up a slave when you have the\nsnapshot of the master and have recorded the master binary log\ncoordinates corresponding to the time of the snapshot. After loading\nthe snapshot into the slave to synchronize it to the slave, you can run\nCHANGE MASTER TO MASTER_LOG_FILE=\'log_name\', MASTER_LOG_POS=log_pos on\nthe slave to specify the coodinates at which the slave should begin\nreading the master binary log.\n\nThe following example changes the master server the slave uses and\nestablishes the master binary log coordinates from which the slave\nbegins reading. This is used when you want to set up the slave to\nreplicate the master:\n\nCHANGE MASTER TO\n MASTER_HOST=\'master2.mycompany.com\',\n MASTER_USER=\'replication\',\n MASTER_PASSWORD=\'bigs3cret\',\n MASTER_PORT=3306,\n MASTER_LOG_FILE=\'master2-bin.001\',\n MASTER_LOG_POS=4,\n MASTER_CONNECT_RETRY=10;\n\nThe next example shows an operation that is less frequently employed.\nIt is used when the slave has relay log files that you want it to\nexecute again for some reason. To do this, the master need not be\nreachable. You need only use CHANGE MASTER TO and start the SQL thread\n(START SLAVE SQL_THREAD):\n\nCHANGE MASTER TO\n RELAY_LOG_FILE=\'slave-relay-bin.006\',\n RELAY_LOG_POS=4025;\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/change-master-to.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/change-master-to.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (185,37,'DROP DATABASE','Syntax:\nDROP {DATABASE | SCHEMA} [IF EXISTS] db_name\n\nDROP DATABASE drops all tables in the database and deletes the\ndatabase. Be very careful with this statement! To use DROP DATABASE,\nyou need the DROP privilege on the database. DROP SCHEMA is a synonym\nfor DROP DATABASE.\n\n*Important*: When a database is dropped, user privileges on the\ndatabase are not automatically dropped. See [HELP GRANT].\n\nIF EXISTS is used to prevent an error from occurring if the database\ndoes not exist.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/drop-database.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/drop-database.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (186,6,'MBREQUAL','MBREqual(g1,g2)\n\nReturns 1 or 0 to indicate whether the Minimum Bounding Rectangles of\nthe two geometries g1 and g2 are the same.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/relations-on-geometry-mbr.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/relations-on-geometry-mbr.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (187,30,'TIMESTAMP FUNCTION','Syntax:\nTIMESTAMP(expr), TIMESTAMP(expr1,expr2)\n\nWith a single argument, this function returns the date or datetime\nexpression expr as a datetime value. With two arguments, it adds the\ntime expression expr2 to the date or datetime expression expr1 and\nreturns the result as a datetime value.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT TIMESTAMP(\'2003-12-31\');\n -> \'2003-12-31 00:00:00\'\nmysql> SELECT TIMESTAMP(\'2003-12-31 12:00:00\',\'12:00:00\');\n -> \'2004-01-01 00:00:00\'\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (188,35,'CHARACTER_LENGTH','Syntax:\nCHARACTER_LENGTH(str)\n\nCHARACTER_LENGTH() is a synonym for CHAR_LENGTH().\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (189,25,'SHOW GRANTS','Syntax:\nSHOW GRANTS [FOR user]\n\nThis statement lists the GRANT statement or statements that must be\nissued to duplicate the privileges that are granted to a MySQL user\naccount. The account is named using the same format as for the GRANT\nstatement; for example, \'jeffrey\'@\'localhost\'. If you specify only the\nuser name part of the account name, a host name part of \'%\' is used.\nFor additional information about specifying account names, see [HELP\nGRANT].\n\nmysql> SHOW GRANTS FOR \'root\'@\'localhost\';\n+---------------------------------------------------------------------+\n| Grants for root@localhost |\n+---------------------------------------------------------------------+\n| GRANT ALL PRIVILEGES ON *.* TO \'root\'@\'localhost\' WITH GRANT OPTION |\n+---------------------------------------------------------------------+\n\nTo list the privileges granted to the account that you are using to\nconnect to the server, you can use any of the following statements:\n\nSHOW GRANTS;\nSHOW GRANTS FOR CURRENT_USER;\nSHOW GRANTS FOR CURRENT_USER();\n\nAs of MySQL 5.1.12, if SHOW GRANTS FOR CURRENT_USER (or any of the\nequivalent syntaxes) is used in DEFINER context, such as within a\nstored procedure that is defined with SQL SECURITY DEFINER), the grants\ndisplayed are those of the definer and not the invoker.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-grants.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/show-grants.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (190,25,'SHOW PRIVILEGES','Syntax:\nSHOW PRIVILEGES\n\nSHOW PRIVILEGES shows the list of system privileges that the MySQL\nserver supports. The exact list of privileges depends on the version of\nyour server.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-privileges.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/show-privileges.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (191,37,'CREATE TABLESPACE','Syntax:\nCREATE TABLESPACE tablespace_name\n ADD DATAFILE \'file_name\'\n USE LOGFILE GROUP logfile_group\n [EXTENT_SIZE [=] extent_size]\n [INITIAL_SIZE [=] initial_size]\n [AUTOEXTEND_SIZE [=] autoextend_size]\n [MAX_SIZE [=] max_size]\n [NODEGROUP [=] nodegroup_id]\n [WAIT]\n [COMMENT [=] comment_text]\n ENGINE [=] engine_name\n\nThis statement is used to create a tablespace, which can contain one or\nmore data files, providing storage space for tables. One data file is\ncreated and added to the tablespace using this statement. Additional\ndata files may be added to the tablespace by using the ALTER TABLESPACE\nstatement (see [HELP ALTER TABLESPACE]). For rules covering the naming\nof tablespaces, see\nhttp://dev.mysql.com/doc/refman/5.1/en/identifiers.html.\n\n*Note*: All MySQL Cluster Disk Data objects share the same namespace.\nThis means that each Disk Data object must be uniquely named (and not\nmerely each Disk Data object of a given type). For example, you cannot\nhave a tablespace and a log file group with the same name, or a\ntablespace and a data file with the same name.\n\nPrior to MySQL Cluster NDB 6.2.17, 6.3.23, and 6.4.3, path and file\nnames for data files could not be longer than 128 characters.\n(Bug#31770 (http://bugs.mysql.com/bug.php?id=31770))\n\nA log file group of one or more UNDO log files must be assigned to the\ntablespace to be created with the USE LOGFILE GROUP clause.\nlogfile_group must be an existing log file group created with CREATE\nLOGFILE GROUP (see\nhttp://dev.mysql.com/doc/refman/5.1/en/create-logfile-group.html).\nMultiple tablespaces may use the same log file group for UNDO logging.\n\nThe EXTENT_SIZE sets the size, in bytes, of the extents used by any\nfiles belonging to the tablespace. The default value is 1M. The minimum\nsize is 32K, and theoretical maximum is 2G, although the practical\nmaximum size depends on a number of factors. In most cases, changing\nthe extent size does not have any measurable effect on performance, and\nthe default value is recommended for all but the most unusual\nsituations.\n\nAn extent is a unit of disk space allocation. One extent is filled with\nas much data as that extent can contain before another extent is used.\nIn theory, up to 65,535 (64K) extents may used per data file; however,\nthe recommended maximum is 32,768 (32K). The recommended maximum size\nfor a single data file is 32G --- that is, 32K extents x 1 MB per\nextent. In addition, once an extent is allocated to a given partition,\nit cannot be used to store data from a different partition; an extent\ncannot store data from more than one partition. This means, for example\nthat a tablespace having a single datafile whose INITIAL_SIZE is 256 MB\nand whose EXTENT_SIZE is 128M has just two extents, and so can be used\nto store data from at most two different disk data table partitions.\n\nYou can see how many extents remain free in a given data file by\nquerying the INFORMATION_SCHEMA.FILES table, and so derive an estimate\nfor how much space remains free in the file. For further discussion and\nexamples, see http://dev.mysql.com/doc/refman/5.1/en/files-table.html.\n\nThe INITIAL_SIZE parameter sets the data file\'s total size in bytes.\nOnce the file has been created, its size cannot be changed; however,\nyou can add more data files to the tablespace using ALTER TABLESPACE\n... ADD DATAFILE. See [HELP ALTER TABLESPACE].\n\nINITIAL_SIZE is optional; its default value is 128M.\n\nOn 32-bit systems, the maximum supported value for INITIAL_SIZE is 4G.\n(Bug#29186 (http://bugs.mysql.com/bug.php?id=29186))\n\nWhen setting EXTENT_SIZE or INITIAL_SIZE (either or both), you may\noptionally follow the number with a one-letter abbreviation for an\norder of magnitude, similar to those used in my.cnf. Generally, this is\none of the letters M (for megabytes) or G (for gigabytes).\n\nINITIAL_SIZE, EXTENT_SIZE, and UNDO_BUFFER_SIZE are subject to rounding\nas follows:\n\no EXTENT_SIZE and UNDO_BUFFER_SIZE are each rounded up to the nearest\n whole multiple of 32K.\n\no INITIAL_SIZE is rounded down to the nearest whole multiple of 32K.\n\n For data files, INITIAL_SIZE is subject to further rounding; the\n result just obtained is rounded up to the nearest whole multiple of\n EXTENT_SIZE (after any rounding).\n\nThe rounding just described has always (since Disk Data tablespaces\nwere introduced in MySQL 5.1.6) been performed implicitly, but\nbeginning with MySQL Cluster NDB 6.2.19, MySQL Cluster NDB 6.3.32,\nMySQL Cluster NDB 7.0.13, and MySQL Cluster NDB 7.1.2, this rounding is\ndone explicitly, and a warning is issued by the MySQL Server when any\nsuch rounding is performed. The rounded values are also used by the NDB\nkernel for calculating INFORMATION_SCHEMA.FILES column values and other\npurposes. However, to avoid an unexpected result, we suggest that you\nalways use whole multiples of 32K in specifying these options.\n\nAUTOEXTEND_SIZE, MAX_SIZE, NODEGROUP, WAIT, and COMMENT are parsed but\nignored, and so currently have no effect. These options are intended\nfor future expansion.\n\nThe ENGINE parameter determines the storage engine which uses this\ntablespace, with engine_name being the name of the storage engine. In\nMySQL 5.1, engine_name must be one of the values NDB or NDBCLUSTER.\n\nWhen CREATE TABLESPACE is used with ENGINE = NDB, a tablespace and\nassociated data file are created on each Cluster data node. You can\nverify that the data files were created and obtain information about\nthem by querying the INFORMATION_SCHEMA.FILES table. For example:\n\nmysql> SELECT LOGFILE_GROUP_NAME, FILE_NAME, EXTRA\n -> FROM INFORMATION_SCHEMA.FILES\n -> WHERE TABLESPACE_NAME = \'newts\' AND FILE_TYPE = \'DATAFILE\';\n+--------------------+-------------+----------------+\n| LOGFILE_GROUP_NAME | FILE_NAME | EXTRA |\n+--------------------+-------------+----------------+\n| lg_3 | newdata.dat | CLUSTER_NODE=3 |\n| lg_3 | newdata.dat | CLUSTER_NODE=4 |\n+--------------------+-------------+----------------+\n2 rows in set (0.01 sec)\n\n(See http://dev.mysql.com/doc/refman/5.1/en/files-table.html.)\n\nCREATE TABLESPACE was added in MySQL 5.1.6. In MySQL 5.1, it is useful\nonly with Disk Data storage for MySQL Cluster. See\nhttp://dev.mysql.com/doc/refman/5.1/en/mysql-cluster-disk-data.html.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/create-tablespace.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/create-tablespace.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (192,35,'INSERT FUNCTION','Syntax:\nINSERT(str,pos,len,newstr)\n\nReturns the string str, with the substring beginning at position pos\nand len characters long replaced by the string newstr. Returns the\noriginal string if pos is not within the length of the string. Replaces\nthe rest of the string from position pos if len is not within the\nlength of the rest of the string. Returns NULL if any argument is NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','mysql> SELECT INSERT(\'Quadratic\', 3, 4, \'What\');\n -> \'QuWhattic\'\nmysql> SELECT INSERT(\'Quadratic\', -1, 4, \'What\');\n -> \'Quadratic\'\nmysql> SELECT INSERT(\'Quadratic\', 3, 100, \'What\');\n -> \'QuWhat\'\n','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (193,4,'CRC32','Syntax:\nCRC32(expr)\n\nComputes a cyclic redundancy check value and returns a 32-bit unsigned\nvalue. The result is NULL if the argument is NULL. The argument is\nexpected to be a string and (if possible) is treated as one if it is\nnot.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html\n\n','mysql> SELECT CRC32(\'MySQL\');\n -> 3259397556\nmysql> SELECT CRC32(\'mysql\');\n -> 2501908538\n','http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (194,13,'XOR','Syntax:\nXOR\n\nLogical XOR. Returns NULL if either operand is NULL. For non-NULL\noperands, evaluates to 1 if an odd number of operands is nonzero,\notherwise 0 is returned.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/logical-operators.html\n\n','mysql> SELECT 1 XOR 1;\n -> 0\nmysql> SELECT 1 XOR 0;\n -> 1\nmysql> SELECT 1 XOR NULL;\n -> NULL\nmysql> SELECT 1 XOR 1 XOR 1;\n -> 1\n','http://dev.mysql.com/doc/refman/5.1/en/logical-operators.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (195,12,'STARTPOINT','StartPoint(ls)\n\nReturns the Point that is the start point of the LineString value ls.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#linestring-property-functions\n\n','mysql> SET @ls = \'LineString(1 1,2 2,3 3)\';\nmysql> SELECT AsText(StartPoint(GeomFromText(@ls)));\n+---------------------------------------+\n| AsText(StartPoint(GeomFromText(@ls))) |\n+---------------------------------------+\n| POINT(1 1) |\n+---------------------------------------+\n','http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#linestring-property-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (196,22,'DECLARE VARIABLE','Syntax:\nDECLARE var_name [, var_name] ... type [DEFAULT value]\n\nThis statement is used to declare local variables within stored\nprograms. To provide a default value for the variable, include a\nDEFAULT clause. The value can be specified as an expression; it need\nnot be a constant. If the DEFAULT clause is missing, the initial value\nis NULL.\n\nLocal variables are treated like stored routine parameters with respect\nto data type and overflow checking. See [HELP CREATE PROCEDURE].\n\nLocal variable names are not case sensitive.\n\nThe scope of a local variable is within the BEGIN ... END block where\nit is declared. The variable can be referred to in blocks nested within\nthe declaring block, except those blocks that declare a variable with\nthe same name.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/declare-local-variable.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/declare-local-variable.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (197,9,'GRANT','Syntax:\nGRANT\n priv_type [(column_list)]\n [, priv_type [(column_list)]] ...\n ON [object_type] priv_level\n TO user [IDENTIFIED BY [PASSWORD] \'password\']\n [, user [IDENTIFIED BY [PASSWORD] \'password\']] ...\n [REQUIRE {NONE | ssl_option [[AND] ssl_option] ...}]\n [WITH with_option ...]\n\nobject_type:\n TABLE\n | FUNCTION\n | PROCEDURE\n\npriv_level:\n *\n | *.*\n | db_name.*\n | db_name.tbl_name\n | tbl_name\n | db_name.routine_name\n\nssl_option:\n SSL\n | X509\n | CIPHER \'cipher\'\n | ISSUER \'issuer\'\n | SUBJECT \'subject\'\n\nwith_option:\n GRANT OPTION\n | MAX_QUERIES_PER_HOUR count\n | MAX_UPDATES_PER_HOUR count\n | MAX_CONNECTIONS_PER_HOUR count\n | MAX_USER_CONNECTIONS count\n\nThe GRANT statement enables system administrators to grant privileges\nto MySQL user accounts. GRANT also serves to specify other account\ncharacteristics such as use of secure connections and limits on access\nto server resources. To use GRANT, you must have the GRANT OPTION\nprivilege, and you must have the privileges that you are granting.\n\nNormally, CREATE USER is used to create an account and GRANT to define\nits privileges. However, if an account named in a GRANT statement does\nnot already exist, GRANT may create it under the conditions described\nlater in the discussion of the NO_AUTO_CREATE_USER SQL mode.\n\nThe REVOKE statement is related to GRANT and enables administrators to\nremove account privileges. To determine what privileges an account has,\nuse SHOW GRANTS. See [HELP REVOKE], and [HELP SHOW GRANTS].\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/grant.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/grant.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (198,3,'MPOLYFROMTEXT','MPolyFromText(wkt[,srid]), MultiPolygonFromText(wkt[,srid])\n\nConstructs a MULTIPOLYGON value using its WKT representation and SRID.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-wkt-functions\n\n','','http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-wkt-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (199,6,'MBRINTERSECTS','MBRIntersects(g1,g2)\n\nReturns 1 or 0 to indicate whether the Minimum Bounding Rectangles of\nthe two geometries g1 and g2 intersect.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/relations-on-geometry-mbr.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/relations-on-geometry-mbr.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (200,16,'BIT_OR','Syntax:\nBIT_OR(expr)\n\nReturns the bitwise OR of all bits in expr. The calculation is\nperformed with 64-bit (BIGINT) precision.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/group-by-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/group-by-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (201,30,'YEARWEEK','Syntax:\nYEARWEEK(date), YEARWEEK(date,mode)\n\nReturns year and week for a date. The mode argument works exactly like\nthe mode argument to WEEK(). The year in the result may be different\nfrom the year in the date argument for the first and the last week of\nthe year.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT YEARWEEK(\'1987-01-01\');\n -> 198653\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (202,17,'NOT BETWEEN','Syntax:\nexpr NOT BETWEEN min AND max\n\nThis is the same as NOT (expr BETWEEN min AND max).\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (203,17,'IS NOT','Syntax:\nIS NOT boolean_value\n\nTests a value against a boolean value, where boolean_value can be TRUE,\nFALSE, or UNKNOWN.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html\n\n','mysql> SELECT 1 IS NOT UNKNOWN, 0 IS NOT UNKNOWN, NULL IS NOT UNKNOWN;\n -> 1, 1, 0\n','http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (204,4,'LOG10','Syntax:\nLOG10(X)\n\nReturns the base-10 logarithm of X.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html\n\n','mysql> SELECT LOG10(2);\n -> 0.30102999566398\nmysql> SELECT LOG10(100);\n -> 2\nmysql> SELECT LOG10(-100);\n -> NULL\n','http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (205,4,'SQRT','Syntax:\nSQRT(X)\n\nReturns the square root of a nonnegative number X.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html\n\n','mysql> SELECT SQRT(4);\n -> 2\nmysql> SELECT SQRT(20);\n -> 4.4721359549996\nmysql> SELECT SQRT(-16);\n -> NULL\n','http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (206,20,'DECIMAL','DECIMAL[(M[,D])] [UNSIGNED] [ZEROFILL]\n\nA packed "exact" fixed-point number. M is the total number of digits\n(the precision) and D is the number of digits after the decimal point\n(the scale). The decimal point and (for negative numbers) the "-" sign\nare not counted in M. If D is 0, values have no decimal point or\nfractional part. The maximum number of digits (M) for DECIMAL is 65.\nThe maximum number of supported decimals (D) is 30. If D is omitted,\nthe default is 0. If M is omitted, the default is 10.\n\nUNSIGNED, if specified, disallows negative values.\n\nAll basic calculations (+, -, *, /) with DECIMAL columns are done with\na precision of 65 digits.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/numeric-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/numeric-type-overview.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (207,37,'CREATE INDEX','Syntax:\nCREATE [ONLINE|OFFLINE] [UNIQUE|FULLTEXT|SPATIAL] INDEX index_name\n [index_type]\n ON tbl_name (index_col_name,...)\n [index_option] ...\n\nindex_col_name:\n col_name [(length)] [ASC | DESC]\n\nindex_type:\n USING {BTREE | HASH | RTREE}\n\nindex_option:\n KEY_BLOCK_SIZE [=] value\n | index_type\n | WITH PARSER parser_name\n\nCREATE INDEX is mapped to an ALTER TABLE statement to create indexes.\nSee [HELP ALTER TABLE]. CREATE INDEX cannot be used to create a PRIMARY\nKEY; use ALTER TABLE instead. For more information about indexes, see\nhttp://dev.mysql.com/doc/refman/5.1/en/mysql-indexes.html.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/create-index.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/create-index.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (208,37,'CREATE FUNCTION','The CREATE FUNCTION statement is used to create stored functions and\nuser-defined functions (UDFs):\n\no For information about creating stored functions, see [HELP CREATE\n PROCEDURE].\n\no For information about creating user-defined functions, see [HELP\n CREATE FUNCTION UDF].\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/create-function.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/create-function.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (209,37,'ALTER DATABASE','Syntax:\nALTER {DATABASE | SCHEMA} [db_name]\n alter_specification ...\nALTER {DATABASE | SCHEMA} db_name\n UPGRADE DATA DIRECTORY NAME\n\nalter_specification:\n [DEFAULT] CHARACTER SET [=] charset_name\n | [DEFAULT] COLLATE [=] collation_name\n\nALTER DATABASE enables you to change the overall characteristics of a\ndatabase. These characteristics are stored in the db.opt file in the\ndatabase directory. To use ALTER DATABASE, you need the ALTER privilege\non the database. ALTER SCHEMA is a synonym for ALTER DATABASE.\n\nThe CHARACTER SET clause changes the default database character set.\nThe COLLATE clause changes the default database collation.\nhttp://dev.mysql.com/doc/refman/5.1/en/charset.html, discusses\ncharacter set and collation names.\n\nYou can see what character sets and collations are available using,\nrespectively, the SHOW CHARACTER SET and SHOW COLLATION statements. See\n[HELP SHOW CHARACTER SET], and [HELP SHOW COLLATION], for more\ninformation.\n\nThe database name can be omitted from the first syntax, in which case\nthe statement applies to the default database.\n\nThe syntax that includes the UPGRADE DATA DIRECTORY NAME clause was\nadded in MySQL 5.1.23. It updates the name of the directory associated\nwith the database to use the encoding implemented in MySQL 5.1 for\nmapping database names to database directory names (see\nhttp://dev.mysql.com/doc/refman/5.1/en/identifier-mapping.html). This\nclause is for use under these conditions:\n\no It is intended when upgrading MySQL to 5.1 or later from older\n versions.\n\no It is intended to update a database directory name to the current\n encoding format if the name contains special characters that need\n encoding.\n\no The statement is used by mysqlcheck (as invoked by mysql_upgrade).\n\nFor example,if a database in MySQL 5.0 has a name of a-b-c, the name\ncontains instance of the `-\' character. In 5.0, the database directory\nis also named a-b-c, which is not necessarily safe for all file\nsystems. In MySQL 5.1 and up, the same database name is encoded as\na@002db@002dc to produce a file system-neutral directory name.\n\nWhen a MySQL installation is upgraded to MySQL 5.1 or later from an\nolder version,the server displays a name such as a-b-c (which is in the\nold format) as #mysql50#a-b-c, and you must refer to the name using the\n#mysql50# prefix. Use UPGRADE DATA DIRECTORY NAME in this case to\nexplicitly tell the server to re-encode the database directory name to\nthe current encoding format:\n\nALTER DATABASE `#mysql50#a-b-c` UPGRADE DATA DIRECTORY NAME;\n\nAfter executing this statement, you can refer to the database as a-b-c\nwithout the special #mysql50# prefix.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/alter-database.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/alter-database.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (210,24,'GEOMETRYN','GeometryN(gc,N)\n\nReturns the N-th geometry in the GeometryCollection value gc.\nGeometries are numbered beginning with 1.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#geometrycollection-property-functions\n\n','mysql> SET @gc = \'GeometryCollection(Point(1 1),LineString(2 2, 3 3))\';\nmysql> SELECT AsText(GeometryN(GeomFromText(@gc),1));\n+----------------------------------------+\n| AsText(GeometryN(GeomFromText(@gc),1)) |\n+----------------------------------------+\n| POINT(1 1) |\n+----------------------------------------+\n','http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#geometrycollection-property-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (211,18,'<<','Syntax:\n<<\n\nShifts a longlong (BIGINT) number to the left.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/bit-functions.html\n\n','mysql> SELECT 1 << 2;\n -> 4\n','http://dev.mysql.com/doc/refman/5.1/en/bit-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (212,25,'SHOW TABLE STATUS','Syntax:\nSHOW TABLE STATUS [{FROM | IN} db_name]\n [LIKE \'pattern\' | WHERE expr]\n\nSHOW TABLE STATUS works likes SHOW TABLES, but provides a lot of\ninformation about each non-TEMPORARY table. You can also get this list\nusing the mysqlshow --status db_name command. The LIKE clause, if\npresent, indicates which table names to match. The WHERE clause can be\ngiven to select rows using more general conditions, as discussed in\nhttp://dev.mysql.com/doc/refman/5.1/en/extended-show.html.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-table-status.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/show-table-status.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (213,11,'MD5','Syntax:\nMD5(str)\n\nCalculates an MD5 128-bit checksum for the string. The value is\nreturned as a binary string of 32 hex digits, or NULL if the argument\nwas NULL. The return value can, for example, be used as a hash key.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/encryption-functions.html\n\n','mysql> SELECT MD5(\'testing\');\n -> \'ae2b1fca515949e5d54fb22b8ed95575\'\n','http://dev.mysql.com/doc/refman/5.1/en/encryption-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (214,17,'<','Syntax:\n<\n\nLess than:\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html\n\n','mysql> SELECT 2 < 2;\n -> 0\n','http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (215,30,'UNIX_TIMESTAMP','Syntax:\nUNIX_TIMESTAMP(), UNIX_TIMESTAMP(date)\n\nIf called with no argument, returns a Unix timestamp (seconds since\n\'1970-01-01 00:00:00\' UTC) as an unsigned integer. If UNIX_TIMESTAMP()\nis called with a date argument, it returns the value of the argument as\nseconds since \'1970-01-01 00:00:00\' UTC. date may be a DATE string, a\nDATETIME string, a TIMESTAMP, or a number in the format YYMMDD or\nYYYYMMDD. The server interprets date as a value in the current time\nzone and converts it to an internal value in UTC. Clients can set their\ntime zone as described in\nhttp://dev.mysql.com/doc/refman/5.1/en/time-zone-support.html.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT UNIX_TIMESTAMP();\n -> 1196440210\nmysql> SELECT UNIX_TIMESTAMP(\'2007-11-30 10:30:19\');\n -> 1196440219\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (216,30,'DAYOFMONTH','Syntax:\nDAYOFMONTH(date)\n\nReturns the day of the month for date, in the range 1 to 31, or 0 for\ndates such as \'0000-00-00\' or \'2008-00-00\' that have a zero day part.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT DAYOFMONTH(\'2007-02-03\');\n -> 3\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (217,35,'ASCII','Syntax:\nASCII(str)\n\nReturns the numeric value of the leftmost character of the string str.\nReturns 0 if str is the empty string. Returns NULL if str is NULL.\nASCII() works for 8-bit characters.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','mysql> SELECT ASCII(\'2\');\n -> 50\nmysql> SELECT ASCII(2);\n -> 50\nmysql> SELECT ASCII(\'dx\');\n -> 100\n','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (218,4,'DIV','Syntax:\nDIV\n\nInteger division. Similar to FLOOR(), but is safe with BIGINT values.\nIncorrect results may occur for noninteger operands that exceed BIGINT\nrange.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/arithmetic-functions.html\n\n','mysql> SELECT 5 DIV 2;\n -> 2\n','http://dev.mysql.com/doc/refman/5.1/en/arithmetic-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (219,9,'RENAME USER','Syntax:\nRENAME USER old_user TO new_user\n [, old_user TO new_user] ...\n\nThe RENAME USER statement renames existing MySQL accounts. To use it,\nyou must have the global CREATE USER privilege or the UPDATE privilege\nfor the mysql database. An error occurs if any old account does not\nexist or any new account exists. Each account is named using the same\nformat as for the GRANT statement; for example, \'jeffrey\'@\'localhost\'.\nIf you specify only the user name part of the account name, a host name\npart of \'%\' is used. For additional information about specifying\naccount names, see [HELP GRANT].\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/rename-user.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/rename-user.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (220,25,'SHOW SLAVE STATUS','Syntax:\nSHOW SLAVE STATUS\n\nThis statement provides status information on essential parameters of\nthe slave threads. It requires either the SUPER or REPLICATION CLIENT\nprivilege.\n\nIf you issue this statement using the mysql client, you can use a \\G\nstatement terminator rather than a semicolon to obtain a more readable\nvertical layout:\n\nmysql> SHOW SLAVE STATUS\\G\n*************************** 1. row ***************************\n Slave_IO_State: Waiting for master to send event\n Master_Host: localhost\n Master_User: root\n Master_Port: 3306\n Connect_Retry: 3\n Master_Log_File: gbichot-bin.005\n Read_Master_Log_Pos: 79\n Relay_Log_File: gbichot-relay-bin.005\n Relay_Log_Pos: 548\n Relay_Master_Log_File: gbichot-bin.005\n Slave_IO_Running: Yes\n Slave_SQL_Running: Yes\n Replicate_Do_DB:\n Replicate_Ignore_DB:\n Replicate_Do_Table:\n Replicate_Ignore_Table:\n Replicate_Wild_Do_Table:\n Replicate_Wild_Ignore_Table:\n Last_Errno: 0\n Last_Error:\n Skip_Counter: 0\n Exec_Master_Log_Pos: 79\n Relay_Log_Space: 552\n Until_Condition: None\n Until_Log_File:\n Until_Log_Pos: 0\n Master_SSL_Allowed: No\n Master_SSL_CA_File:\n Master_SSL_CA_Path:\n Master_SSL_Cert:\n Master_SSL_Cipher:\n Master_SSL_Key:\n Seconds_Behind_Master: 8\nMaster_SSL_Verify_Server_Cert: No\n Last_IO_Errno: 0\n Last_IO_Error:\n Last_SQL_Errno: 0\n Last_SQL_Error:\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-slave-status.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/show-slave-status.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (221,32,'GEOMETRY','MySQL provides a standard way of creating spatial columns for geometry\ntypes, for example, with CREATE TABLE or ALTER TABLE. Currently,\nspatial columns are supported for MyISAM, InnoDB, NDB, and ARCHIVE\ntables. See also the annotations about spatial indexes under [HELP\nSPATIAL].\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-columns.html\n\n','CREATE TABLE geom (g GEOMETRY);\n','http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-columns.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (222,12,'NUMPOINTS','NumPoints(ls)\n\nReturns the number of Point objects in the LineString value ls.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#linestring-property-functions\n\n','mysql> SET @ls = \'LineString(1 1,2 2,3 3)\';\nmysql> SELECT NumPoints(GeomFromText(@ls));\n+------------------------------+\n| NumPoints(GeomFromText(@ls)) |\n+------------------------------+\n| 3 |\n+------------------------------+\n','http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#linestring-property-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (223,37,'ALTER LOGFILE GROUP','Syntax:\nALTER LOGFILE GROUP logfile_group\n ADD UNDOFILE \'file_name\'\n [INITIAL_SIZE [=] size]\n [WAIT]\n ENGINE [=] engine_name\n\nThis statement adds an UNDO file named \'file_name\' to an existing log\nfile group logfile_group. An ALTER LOGFILE GROUP statement has one and\nonly one ADD UNDOFILE clause. No DROP UNDOFILE clause is currently\nsupported.\n\n*Note*: All MySQL Cluster Disk Data objects share the same namespace.\nThis means that each Disk Data object must be uniquely named (and not\nmerely each Disk Data object of a given type). For example, you cannot\nhave a tablespace and an undo log file with the same name, or an undo\nlog file and a data file with the same name.\n\nPrior to MySQL Cluster NDB 6.2.17, 6.3.23, and 6.4.3, path and file\nnames for undo log files could not be longer than 128 characters.\n(Bug#31769 (http://bugs.mysql.com/bug.php?id=31769))\n\nThe optional INITIAL_SIZE parameter sets the UNDO file\'s initial size\nin bytes; if not specified, the initial size default to 128M (128\nmegabytes). You may optionally follow size with a one-letter\nabbreviation for an order of magnitude, similar to those used in\nmy.cnf. Generally, this is one of the letters M (for megabytes) or G\n(for gigabytes).\n\nOn 32-bit systems, the maximum supported value for INITIAL_SIZE is 4G.\n(Bug#29186 (http://bugs.mysql.com/bug.php?id=29186))\n\nBeginning with MySQL Cluster NDB 2.1.18, 6.3.24, and 7.0.4, the minimum\nallowed value for INITIAL_SIZE is 1M. (Bug#29574\n(http://bugs.mysql.com/bug.php?id=29574))\n\n*Note*: WAIT is parsed but otherwise ignored, and so has no effect in\nMySQL 5.1 and MySQL Cluster NDB 6.x. It is intended for future\nexpansion.\n\nThe ENGINE parameter (required) determines the storage engine which is\nused by this log file group, with engine_name being the name of the\nstorage engine. In MySQL 5.1 and MySQL Cluster NDB 6.x, the only\naccepted values for engine_name are "NDBCLUSTER" and "NDB". The two\nvalues are equivalent.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/alter-logfile-group.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/alter-logfile-group.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (224,18,'&','Syntax:\n&\n\nBitwise AND:\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/bit-functions.html\n\n','mysql> SELECT 29 & 15;\n -> 13\n','http://dev.mysql.com/doc/refman/5.1/en/bit-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (225,30,'LOCALTIMESTAMP','Syntax:\nLOCALTIMESTAMP, LOCALTIMESTAMP()\n\nLOCALTIMESTAMP and LOCALTIMESTAMP() are synonyms for NOW().\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (226,35,'CONVERT','Syntax:\nCONVERT(expr,type), CONVERT(expr USING transcoding_name)\n\nThe CONVERT() and CAST() functions take a value of one type and produce\na value of another type.\n\nThe type can be one of the following values:\n\no BINARY[(N)]\n\no CHAR[(N)]\n\no DATE\n\no DATETIME\n\no DECIMAL[(M[,D])]\n\no SIGNED [INTEGER]\n\no TIME\n\no UNSIGNED [INTEGER]\n\nBINARY produces a string with the BINARY data type. See\nhttp://dev.mysql.com/doc/refman/5.1/en/binary-varbinary.html for a\ndescription of how this affects comparisons. If the optional length N\nis given, BINARY(N) causes the cast to use no more than N bytes of the\nargument. Values shorter than N bytes are padded with 0x00 bytes to a\nlength of N.\n\nCHAR(N) causes the cast to use no more than N characters of the\nargument.\n\nCAST() and CONVERT(... USING ...) are standard SQL syntax. The\nnon-USING form of CONVERT() is ODBC syntax.\n\nCONVERT() with USING is used to convert data between different\ncharacter sets. In MySQL, transcoding names are the same as the\ncorresponding character set names. For example, this statement converts\nthe string \'abc\' in the default character set to the corresponding\nstring in the utf8 character set:\n\nSELECT CONVERT(\'abc\' USING utf8);\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/cast-functions.html\n\n','SELECT enum_col FROM tbl_name ORDER BY CAST(enum_col AS CHAR);\n','http://dev.mysql.com/doc/refman/5.1/en/cast-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (227,30,'ADDDATE','Syntax:\nADDDATE(date,INTERVAL expr unit), ADDDATE(expr,days)\n\nWhen invoked with the INTERVAL form of the second argument, ADDDATE()\nis a synonym for DATE_ADD(). The related function SUBDATE() is a\nsynonym for DATE_SUB(). For information on the INTERVAL unit argument,\nsee the discussion for DATE_ADD().\n\nmysql> SELECT DATE_ADD(\'2008-01-02\', INTERVAL 31 DAY);\n -> \'2008-02-02\'\nmysql> SELECT ADDDATE(\'2008-01-02\', INTERVAL 31 DAY);\n -> \'2008-02-02\'\n\nWhen invoked with the days form of the second argument, MySQL treats it\nas an integer number of days to be added to expr.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT ADDDATE(\'2008-01-02\', 31);\n -> \'2008-02-02\'\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (228,22,'REPEAT LOOP','Syntax:\n[begin_label:] REPEAT\n statement_list\nUNTIL search_condition\nEND REPEAT [end_label]\n\nThe statement list within a REPEAT statement is repeated until the\nsearch_condition is true. Thus, a REPEAT always enters the loop at\nleast once. statement_list consists of one or more statements, each\nterminated by a semicolon (;) statement delimiter.\n\nA REPEAT statement can be labeled. See [HELP BEGIN END] for the rules\nregarding label use.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/repeat-statement.html\n\n','mysql> delimiter //\n\nmysql> CREATE PROCEDURE dorepeat(p1 INT)\n -> BEGIN\n -> SET @x = 0;\n -> REPEAT SET @x = @x + 1; UNTIL @x > p1 END REPEAT;\n -> END\n -> //\nQuery OK, 0 rows affected (0.00 sec)\n\nmysql> CALL dorepeat(1000)//\nQuery OK, 0 rows affected (0.00 sec)\n\nmysql> SELECT @x//\n+------+\n| @x |\n+------+\n| 1001 |\n+------+\n1 row in set (0.00 sec)\n','http://dev.mysql.com/doc/refman/5.1/en/repeat-statement.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (229,37,'ALTER FUNCTION','Syntax:\nALTER FUNCTION func_name [characteristic ...]\n\ncharacteristic:\n { CONTAINS SQL | NO SQL | READS SQL DATA | MODIFIES SQL DATA }\n | SQL SECURITY { DEFINER | INVOKER }\n | COMMENT \'string\'\n\nThis statement can be used to change the characteristics of a stored\nfunction. More than one change may be specified in an ALTER FUNCTION\nstatement. However, you cannot change the parameters or body of a\nstored function using this statement; to make such changes, you must\ndrop and re-create the function using DROP FUNCTION and CREATE\nFUNCTION.\n\nYou must have the ALTER ROUTINE privilege for the function. (That\nprivilege is granted automatically to the function creator.) If binary\nlogging is enabled, the ALTER FUNCTION statement might also require the\nSUPER privilege, as described in\nhttp://dev.mysql.com/doc/refman/5.1/en/stored-programs-logging.html.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/alter-function.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/alter-function.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (230,20,'SMALLINT','SMALLINT[(M)] [UNSIGNED] [ZEROFILL]\n\nA small integer. The signed range is -32768 to 32767. The unsigned\nrange is 0 to 65535.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/numeric-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/numeric-type-overview.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (231,20,'DOUBLE PRECISION','DOUBLE PRECISION[(M,D)] [UNSIGNED] [ZEROFILL], REAL[(M,D)] [UNSIGNED]\n[ZEROFILL]\n\nThese types are synonyms for DOUBLE. Exception: If the REAL_AS_FLOAT\nSQL mode is enabled, REAL is a synonym for FLOAT rather than DOUBLE.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/numeric-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/numeric-type-overview.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (232,35,'ORD','Syntax:\nORD(str)\n\nIf the leftmost character of the string str is a multi-byte character,\nreturns the code for that character, calculated from the numeric values\nof its constituent bytes using this formula:\n\n (1st byte code)\n+ (2nd byte code x 256)\n+ (3rd byte code x 2562) ...\n\nIf the leftmost character is not a multi-byte character, ORD() returns\nthe same value as the ASCII() function.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','mysql> SELECT ORD(\'2\');\n -> 50\n','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (233,25,'DEALLOCATE PREPARE','Syntax:\n{DEALLOCATE | DROP} PREPARE stmt_name\n\nTo deallocate a prepared statement produced with PREPARE, use a\nDEALLOCATE PREPARE statement that refers to the prepared statement\nname. Attempting to execute a prepared statement after deallocating it\nresults in an error.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/deallocate-prepare.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/deallocate-prepare.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (234,34,'ENVELOPE','Envelope(g)\n\nReturns the Minimum Bounding Rectangle (MBR) for the geometry value g.\nThe result is returned as a Polygon value.\n\nThe polygon is defined by the corner points of the bounding box:\n\nPOLYGON((MINX MINY, MAXX MINY, MAXX MAXY, MINX MAXY, MINX MINY))\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#general-geometry-property-functions\n\n','mysql> SELECT AsText(Envelope(GeomFromText(\'LineString(1 1,2 2)\')));\n+-------------------------------------------------------+\n| AsText(Envelope(GeomFromText(\'LineString(1 1,2 2)\'))) |\n+-------------------------------------------------------+\n| POLYGON((1 1,2 1,2 2,1 2,1 1)) |\n+-------------------------------------------------------+\n','http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#general-geometry-property-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (235,14,'IS_FREE_LOCK','Syntax:\nIS_FREE_LOCK(str)\n\nChecks whether the lock named str is free to use (that is, not locked).\nReturns 1 if the lock is free (no one is using the lock), 0 if the lock\nis in use, and NULL if an error occurs (such as an incorrect argument).\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/miscellaneous-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/miscellaneous-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (236,29,'TOUCHES','Touches(g1,g2)\n\nReturns 1 or 0 to indicate whether g1 spatially touches g2. Two\ngeometries spatially touch if the interiors of the geometries do not\nintersect, but the boundary of one of the geometries intersects either\nthe boundary or the interior of the other.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/functions-that-test-spatial-relationships-between-geometries.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/functions-that-test-spatial-relationships-between-geometries.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (237,14,'INET_ATON','Syntax:\nINET_ATON(expr)\n\nGiven the dotted-quad representation of a network address as a string,\nreturns an integer that represents the numeric value of the address.\nAddresses may be 4- or 8-byte addresses.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/miscellaneous-functions.html\n\n','mysql> SELECT INET_ATON(\'209.207.224.40\');\n -> 3520061480\n','http://dev.mysql.com/doc/refman/5.1/en/miscellaneous-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (238,11,'UNCOMPRESS','Syntax:\nUNCOMPRESS(string_to_uncompress)\n\nUncompresses a string compressed by the COMPRESS() function. If the\nargument is not a compressed value, the result is NULL. This function\nrequires MySQL to have been compiled with a compression library such as\nzlib. Otherwise, the return value is always NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/encryption-functions.html\n\n','mysql> SELECT UNCOMPRESS(COMPRESS(\'any string\'));\n -> \'any string\'\nmysql> SELECT UNCOMPRESS(\'any string\');\n -> NULL\n','http://dev.mysql.com/doc/refman/5.1/en/encryption-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (239,20,'AUTO_INCREMENT','The AUTO_INCREMENT attribute can be used to generate a unique identity\nfor new rows:\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/example-auto-increment.html\n\n','CREATE TABLE animals (\n id MEDIUMINT NOT NULL AUTO_INCREMENT,\n name CHAR(30) NOT NULL,\n PRIMARY KEY (id)\n );\n\nINSERT INTO animals (name) VALUES\n (\'dog\'),(\'cat\'),(\'penguin\'),\n (\'lax\'),(\'whale\'),(\'ostrich\');\n\nSELECT * FROM animals;\n','http://dev.mysql.com/doc/refman/5.1/en/example-auto-increment.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (240,34,'ISSIMPLE','IsSimple(g)\n\nCurrently, this function is a placeholder and should not be used. If\nimplemented, its behavior will be as described in the next paragraph.\n\nReturns 1 if the geometry value g has no anomalous geometric points,\nsuch as self-intersection or self-tangency. IsSimple() returns 0 if the\nargument is not simple, and -1 if it is NULL.\n\nThe description of each instantiable geometric class given earlier in\nthe chapter includes the specific conditions that cause an instance of\nthat class to be classified as not simple. (See [HELP Geometry\nhierarchy].)\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#general-geometry-property-functions\n\n','','http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#general-geometry-property-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (241,4,'- BINARY','Syntax:\n-\n\nSubtraction:\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/arithmetic-functions.html\n\n','mysql> SELECT 3-5;\n -> -2\n','http://dev.mysql.com/doc/refman/5.1/en/arithmetic-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (242,3,'GEOMCOLLFROMTEXT','GeomCollFromText(wkt[,srid]), GeometryCollectionFromText(wkt[,srid])\n\nConstructs a GEOMETRYCOLLECTION value using its WKT representation and\nSRID.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-wkt-functions\n\n','','http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-wkt-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (243,3,'WKT DEFINITION','The Well-Known Text (WKT) representation of Geometry is designed to\nexchange geometry data in ASCII form.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/gis-wkt-format.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/gis-wkt-format.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (244,30,'CURRENT_TIME','Syntax:\nCURRENT_TIME, CURRENT_TIME()\n\nCURRENT_TIME and CURRENT_TIME() are synonyms for CURTIME().\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (245,9,'REVOKE','Syntax:\nREVOKE\n priv_type [(column_list)]\n [, priv_type [(column_list)]] ...\n ON [object_type] priv_level\n FROM user [, user] ...\n\nREVOKE ALL PRIVILEGES, GRANT OPTION\n FROM user [, user] ...\n\nThe REVOKE statement enables system administrators to revoke privileges\nfrom MySQL accounts. Each account is named using the same format as for\nthe GRANT statement; for example, \'jeffrey\'@\'localhost\'. If you specify\nonly the user name part of the account name, a host name part of \'%\' is\nused. For details on the levels at which privileges exist, the\nallowable priv_type and priv_level values, and the syntax for\nspecifying users and passwords, see [HELP GRANT]\n\nTo use the first REVOKE syntax, you must have the GRANT OPTION\nprivilege, and you must have the privileges that you are revoking.\n\nTo revoke all privileges, use the second syntax, which drops all\nglobal, database, table, column, and routine privileges for the named\nuser or users:\n\nREVOKE ALL PRIVILEGES, GRANT OPTION FROM user [, user] ...\n\nTo use this REVOKE syntax, you must have the global CREATE USER\nprivilege or the UPDATE privilege for the mysql database.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/revoke.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/revoke.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (246,15,'LAST_INSERT_ID','Syntax:\nLAST_INSERT_ID(), LAST_INSERT_ID(expr)\n\nFor MySQL 5.1.12 and later, LAST_INSERT_ID() (no arguments) returns the\nfirst automatically generated value successfully inserted for an\nAUTO_INCREMENT column as a result of the most recently executed INSERT\nstatement. The value of LAST_INSERT_ID() remains unchanged if no rows\nare successfully inserted.\n\nFor example, after inserting a row that generates an AUTO_INCREMENT\nvalue, you can get the value like this:\n\nmysql> SELECT LAST_INSERT_ID();\n -> 195\n\nIn MySQL 5.1.11 and earlier, LAST_INSERT_ID() (no arguments) returns\nthe first automatically generated value if any rows were successfully\ninserted or updated. This means that the returned value could be a\nvalue that was not successfully inserted into the table. If no rows\nwere successfully inserted, LAST_INSERT_ID() returns 0.\n\nThe value of LAST_INSERT_ID() will be consistent across all versions if\nall rows in the INSERT or UPDATE statement were successful.\n\nif a table contains an AUTO_INCREMENT column and INSERT ... ON\nDUPLICATE KEY UPDATE updates (rather than inserts) a row, the value of\nLAST_INSERT_ID() is not meaningful prior to MySQL 5.1.12. For a\nworkaround, see\nhttp://dev.mysql.com/doc/refman/5.1/en/insert-on-duplicate.html.\n\nThe currently executing statement does not affect the value of\nLAST_INSERT_ID(). Suppose that you generate an AUTO_INCREMENT value\nwith one statement, and then refer to LAST_INSERT_ID() in a\nmultiple-row INSERT statement that inserts rows into a table with its\nown AUTO_INCREMENT column. The value of LAST_INSERT_ID() will remain\nstable in the second statement; its value for the second and later rows\nis not affected by the earlier row insertions. (However, if you mix\nreferences to LAST_INSERT_ID() and LAST_INSERT_ID(expr), the effect is\nundefined.)\n\nIf the previous statement returned an error, the value of\nLAST_INSERT_ID() is undefined. For transactional tables, if the\nstatement is rolled back due to an error, the value of LAST_INSERT_ID()\nis left undefined. For manual ROLLBACK, the value of LAST_INSERT_ID()\nis not restored to that before the transaction; it remains as it was at\nthe point of the ROLLBACK.\n\nWithin the body of a stored routine (procedure or function) or a\ntrigger, the value of LAST_INSERT_ID() changes the same way as for\nstatements executed outside the body of these kinds of objects. The\neffect of a stored routine or trigger upon the value of\nLAST_INSERT_ID() that is seen by following statements depends on the\nkind of routine:\n\no If a stored procedure executes statements that change the value of\n LAST_INSERT_ID(), the changed value will be seen by statements that\n follow the procedure call.\n\no For stored functions and triggers that change the value, the value is\n restored when the function or trigger ends, so following statements\n will not see a changed value.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/information-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/information-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (247,30,'LAST_DAY','Syntax:\nLAST_DAY(date)\n\nTakes a date or datetime value and returns the corresponding value for\nthe last day of the month. Returns NULL if the argument is invalid.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT LAST_DAY(\'2003-02-05\');\n -> \'2003-02-28\'\nmysql> SELECT LAST_DAY(\'2004-02-05\');\n -> \'2004-02-29\'\nmysql> SELECT LAST_DAY(\'2004-01-01 01:01:01\');\n -> \'2004-01-31\'\nmysql> SELECT LAST_DAY(\'2003-03-32\');\n -> NULL\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (248,20,'MEDIUMINT','MEDIUMINT[(M)] [UNSIGNED] [ZEROFILL]\n\nA medium-sized integer. The signed range is -8388608 to 8388607. The\nunsigned range is 0 to 16777215.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/numeric-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/numeric-type-overview.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (249,4,'FLOOR','Syntax:\nFLOOR(X)\n\nReturns the largest integer value not greater than X.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html\n\n','mysql> SELECT FLOOR(1.23);\n -> 1\nmysql> SELECT FLOOR(-1.23);\n -> -2\n','http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (250,35,'RTRIM','Syntax:\nRTRIM(str)\n\nReturns the string str with trailing space characters removed.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','mysql> SELECT RTRIM(\'barbar \');\n -> \'barbar\'\n','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (251,27,'EXPLAIN','Syntax:\nEXPLAIN tbl_name\n\nOr:\n\nEXPLAIN [EXTENDED | PARTITIONS] SELECT select_options\n\nThe EXPLAIN statement can be used either as a synonym for DESCRIBE or\nas a way to obtain information about how MySQL executes a SELECT\nstatement:\n\no EXPLAIN tbl_name is synonymous with DESCRIBE tbl_name or SHOW COLUMNS\n FROM tbl_name.\n\n For a description of the DESCRIBE and SHOW COLUMNS statements, see\n [HELP DESCRIBE], and [HELP SHOW COLUMNS].\n\no When you precede a SELECT statement with the keyword EXPLAIN, MySQL\n displays information from the optimizer about the query execution\n plan. That is, MySQL explains how it would process the SELECT,\n including information about how tables are joined and in which order.\n EXPLAIN EXTENDED can be used to provide additional information.\n\n For information regarding the use of EXPLAIN and EXPLAIN EXTENDED for\n obtaining query execution plan information, see\n http://dev.mysql.com/doc/refman/5.1/en/using-explain.html.\n\no EXPLAIN PARTITIONS is available beginning with MySQL 5.1.5. It is\n useful only when examining queries involving partitioned tables.\n\n For details, see\n http://dev.mysql.com/doc/refman/5.1/en/partitioning-info.html.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/explain.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/explain.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (252,4,'DEGREES','Syntax:\nDEGREES(X)\n\nReturns the argument X, converted from radians to degrees.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html\n\n','mysql> SELECT DEGREES(PI());\n -> 180\nmysql> SELECT DEGREES(PI() / 2);\n -> 90\n','http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (253,20,'VARCHAR','[NATIONAL] VARCHAR(M) [CHARACTER SET charset_name] [COLLATE\ncollation_name]\n\nA variable-length string. M represents the maximum column length in\ncharacters. The range of M is 0 to 65,535. The effective maximum length\nof a VARCHAR is subject to the maximum row size (65,535 bytes, which is\nshared among all columns) and the character set used. For example, utf8\ncharacters can require up to three bytes per character, so a VARCHAR\ncolumn that uses the utf8 character set can be declared to be a maximum\nof 21,844 characters.\n\nMySQL stores VARCHAR values as a one-byte or two-byte length prefix\nplus data. The length prefix indicates the number of bytes in the\nvalue. A VARCHAR column uses one length byte if values require no more\nthan 255 bytes, two length bytes if values may require more than 255\nbytes.\n\n*Note*: MySQL 5.1 follows the standard SQL specification, and does not\nremove trailing spaces from VARCHAR values.\n\nVARCHAR is shorthand for CHARACTER VARYING. NATIONAL VARCHAR is the\nstandard SQL way to define that a VARCHAR column should use some\npredefined character set. MySQL 4.1 and up uses utf8 as this predefined\ncharacter set.\nhttp://dev.mysql.com/doc/refman/5.1/en/charset-national.html. NVARCHAR\nis shorthand for NATIONAL VARCHAR.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/string-type-overview.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (254,35,'UNHEX','Syntax:\n\nUNHEX(str)\n\nPerforms the inverse operation of HEX(str). That is, it interprets each\npair of hexadecimal digits in the argument as a number and converts it\nto the character represented by the number. The resulting characters\nare returned as a binary string.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','mysql> SELECT UNHEX(\'4D7953514C\');\n -> \'MySQL\'\nmysql> SELECT 0x4D7953514C;\n -> \'MySQL\'\nmysql> SELECT UNHEX(HEX(\'string\'));\n -> \'string\'\nmysql> SELECT HEX(UNHEX(\'1267\'));\n -> \'1267\'\n','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (255,4,'- UNARY','Syntax:\n-\n\nUnary minus. This operator changes the sign of the argument.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/arithmetic-functions.html\n\n','mysql> SELECT - 2;\n -> -2\n','http://dev.mysql.com/doc/refman/5.1/en/arithmetic-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (256,22,'SELECT INTO','Syntax:\nSELECT col_name [, col_name] ...\n INTO var_name [, var_name] ...\n table_expr\n\nSELECT ... INTO syntax enables selected columns to be stored directly\ninto variables. The query should return a single row. If the query\nreturns no rows, a warning with error code 1329 occurs (No data), and\nthe variable values remain unchanged. If the query returns multiple\nrows, error 1172 occurs (Result consisted of more than one row). If it\nis possible that the statement may retrieve multiple rows, you can use\nLIMIT 1 to limit the result set to a single row.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/select-into-statement.html\n\n','SELECT id,data INTO x,y FROM test.t1 LIMIT 1;\n','http://dev.mysql.com/doc/refman/5.1/en/select-into-statement.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (257,16,'STD','Syntax:\nSTD(expr)\n\nReturns the population standard deviation of expr. This is an extension\nto standard SQL. The standard SQL function STDDEV_POP() can be used\ninstead.\n\nThis function returns NULL if there were no matching rows.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/group-by-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/group-by-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (258,4,'COS','Syntax:\nCOS(X)\n\nReturns the cosine of X, where X is given in radians.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html\n\n','mysql> SELECT COS(PI());\n -> -1\n','http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (259,30,'DATE FUNCTION','Syntax:\nDATE(expr)\n\nExtracts the date part of the date or datetime expression expr.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT DATE(\'2003-12-31 01:02:03\');\n -> \'2003-12-31\'\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (260,37,'DROP TRIGGER','Syntax:\nDROP TRIGGER [IF EXISTS] [schema_name.]trigger_name\n\nThis statement drops a trigger. The schema (database) name is optional.\nIf the schema is omitted, the trigger is dropped from the default\nschema. DROP TRIGGER was added in MySQL 5.0.2. Its use requires the\nTRIGGER privilege for the table associated with the trigger. (This\nstatement requires the SUPER privilege prior to MySQL 5.1.6.)\n\nUse IF EXISTS to prevent an error from occurring for a trigger that\ndoes not exist. A NOTE is generated for a nonexistent trigger when\nusing IF EXISTS. See [HELP SHOW WARNINGS]. The IF EXISTS clause was\nadded in MySQL 5.1.14.\n\nTriggers for a table are also dropped if you drop the table.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/drop-trigger.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/drop-trigger.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (261,25,'RESET MASTER','Syntax:\nRESET MASTER\n\nDeletes all binary log files listed in the index file, resets the\nbinary log index file to be empty, and creates a new binary log file.\nThis statement is intended to be used only when the master is started\nfor the first time.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/reset-master.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/reset-master.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (262,4,'TAN','Syntax:\nTAN(X)\n\nReturns the tangent of X, where X is given in radians.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html\n\n','mysql> SELECT TAN(PI());\n -> -1.2246063538224e-16\nmysql> SELECT TAN(PI()+1);\n -> 1.5574077246549\n','http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (263,4,'PI','Syntax:\nPI()\n\nReturns the value of π (pi). The default number of decimal places\ndisplayed is seven, but MySQL uses the full double-precision value\ninternally.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html\n\n','mysql> SELECT PI();\n -> 3.141593\nmysql> SELECT PI()+0.000000000000000000;\n -> 3.141592653589793116\n','http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (264,30,'WEEKOFYEAR','Syntax:\nWEEKOFYEAR(date)\n\nReturns the calendar week of the date as a number in the range from 1\nto 53. WEEKOFYEAR() is a compatibility function that is equivalent to\nWEEK(date,3).\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT WEEKOFYEAR(\'2008-02-20\');\n -> 8\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (265,4,'/','Syntax:\n/\n\nDivision:\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/arithmetic-functions.html\n\n','mysql> SELECT 3/5;\n -> 0.60\n','http://dev.mysql.com/doc/refman/5.1/en/arithmetic-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (266,25,'PURGE BINARY LOGS','Syntax:\nPURGE { BINARY | MASTER } LOGS\n { TO \'log_name\' | BEFORE datetime_expr }\n\nThe binary log is a set of files that contain information about data\nmodifications made by the MySQL server. The log consists of a set of\nbinary log files, plus an index file (see\nhttp://dev.mysql.com/doc/refman/5.1/en/binary-log.html).\n\nThe PURGE BINARY LOGS statement deletes all the binary log files listed\nin the log index file prior to the specified log file name or date.\nBINARY and MASTER are synonyms. Deleted log files also are removed from\nthe list recorded in the index file, so that the given log file becomes\nthe first in the list.\n\nThis statement has no effect if the server was not started with the\n--log-bin option to enable binary logging.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/purge-binary-logs.html\n\n','PURGE BINARY LOGS TO \'mysql-bin.010\';\nPURGE BINARY LOGS BEFORE \'2008-04-02 22:46:26\';\n','http://dev.mysql.com/doc/refman/5.1/en/purge-binary-logs.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (267,16,'STDDEV_SAMP','Syntax:\nSTDDEV_SAMP(expr)\n\nReturns the sample standard deviation of expr (the square root of\nVAR_SAMP().\n\nSTDDEV_SAMP() returns NULL if there were no matching rows.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/group-by-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/group-by-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (268,15,'SCHEMA','Syntax:\nSCHEMA()\n\nThis function is a synonym for DATABASE().\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/information-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/information-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (269,31,'MLINEFROMWKB','MLineFromWKB(wkb[,srid]), MultiLineStringFromWKB(wkb[,srid])\n\nConstructs a MULTILINESTRING value using its WKB representation and\nSRID.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-wkb-functions\n\n','','http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-wkb-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (270,4,'LOG2','Syntax:\nLOG2(X)\n\nReturns the base-2 logarithm of X.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html\n\n','mysql> SELECT LOG2(65536);\n -> 16\nmysql> SELECT LOG2(-100);\n -> NULL\n','http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (271,30,'SUBTIME','Syntax:\nSUBTIME(expr1,expr2)\n\nSUBTIME() returns expr1 - expr2 expressed as a value in the same format\nas expr1. expr1 is a time or datetime expression, and expr2 is a time\nexpression.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT SUBTIME(\'2007-12-31 23:59:59.999999\',\'1 1:1:1.000002\');\n -> \'2007-12-30 22:58:58.999997\'\nmysql> SELECT SUBTIME(\'01:00:00.999999\', \'02:00:00.999998\');\n -> \'-00:59:59.999999\'\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (272,11,'UNCOMPRESSED_LENGTH','Syntax:\nUNCOMPRESSED_LENGTH(compressed_string)\n\nReturns the length that the compressed string had before being\ncompressed.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/encryption-functions.html\n\n','mysql> SELECT UNCOMPRESSED_LENGTH(COMPRESS(REPEAT(\'a\',30)));\n -> 30\n','http://dev.mysql.com/doc/refman/5.1/en/encryption-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (273,37,'DROP TABLE','Syntax:\nDROP [TEMPORARY] TABLE [IF EXISTS]\n tbl_name [, tbl_name] ...\n [RESTRICT | CASCADE]\n\nDROP TABLE removes one or more tables. You must have the DROP privilege\nfor each table. All table data and the table definition are removed, so\nbe careful with this statement! If any of the tables named in the\nargument list do not exist, MySQL returns an error indicating by name\nwhich nonexisting tables it was unable to drop, but it also drops all\nof the tables in the list that do exist.\n\n*Important*: When a table is dropped, user privileges on the table are\nnot automatically dropped. See [HELP GRANT].\n\nNote that for a partitioned table, DROP TABLE permanently removes the\ntable definition, all of its partitions, and all of the data which was\nstored in those partitions. It also removes the partitioning definition\n(.par) file associated with the dropped table.\n\nUse IF EXISTS to prevent an error from occurring for tables that do not\nexist. A NOTE is generated for each nonexistent table when using IF\nEXISTS. See [HELP SHOW WARNINGS].\n\nRESTRICT and CASCADE are allowed to make porting easier. In MySQL 5.1,\nthey do nothing.\n\n*Note*: DROP TABLE automatically commits the current active\ntransaction, unless you use the TEMPORARY keyword.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/drop-table.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/drop-table.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (274,4,'POW','Syntax:\nPOW(X,Y)\n\nReturns the value of X raised to the power of Y.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html\n\n','mysql> SELECT POW(2,2);\n -> 4\nmysql> SELECT POW(2,-2);\n -> 0.25\n','http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (275,25,'SHOW CREATE TABLE','Syntax:\nSHOW CREATE TABLE tbl_name\n\nShows the CREATE TABLE statement that creates the given table. The\nstatement requires the SELECT privilege for the table. This statement\nalso works with views.\nSHOW CREATE TABLE quotes table and column names according to the value\nof the sql_quote_show_create option. See\nhttp://dev.mysql.com/doc/refman/5.1/en/server-session-variables.html.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-create-table.html\n\n','mysql> SHOW CREATE TABLE t\\G\n*************************** 1. row ***************************\n Table: t\nCreate Table: CREATE TABLE t (\n id INT(11) default NULL auto_increment,\n s char(60) default NULL,\n PRIMARY KEY (id)\n) ENGINE=MyISAM\n','http://dev.mysql.com/doc/refman/5.1/en/show-create-table.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (276,26,'DUAL','You are allowed to specify DUAL as a dummy table name in situations\nwhere no tables are referenced:\n\nmysql> SELECT 1 + 1 FROM DUAL;\n -> 2\n\nDUAL is purely for the convenience of people who require that all\nSELECT statements should have FROM and possibly other clauses. MySQL\nmay ignore the clauses. MySQL does not require FROM DUAL if no tables\nare referenced.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/select.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/select.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (277,35,'INSTR','Syntax:\nINSTR(str,substr)\n\nReturns the position of the first occurrence of substring substr in\nstring str. This is the same as the two-argument form of LOCATE(),\nexcept that the order of the arguments is reversed.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','mysql> SELECT INSTR(\'foobarbar\', \'bar\');\n -> 4\nmysql> SELECT INSTR(\'xbar\', \'foobar\');\n -> 0\n','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (278,30,'NOW','Syntax:\nNOW()\n\nReturns the current date and time as a value in \'YYYY-MM-DD HH:MM:SS\'\nor YYYYMMDDHHMMSS.uuuuuu format, depending on whether the function is\nused in a string or numeric context. The value is expressed in the\ncurrent time zone.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT NOW();\n -> \'2007-12-15 23:50:26\'\nmysql> SELECT NOW() + 0;\n -> 20071215235026.000000\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (279,25,'SHOW ENGINES','Syntax:\nSHOW [STORAGE] ENGINES\n\nSHOW ENGINES displays status information about the server\'s storage\nengines. This is particularly useful for checking whether a storage\nengine is supported, or to see what the default engine is. SHOW TABLE\nTYPES is a synonym, but is deprecated and is removed in MySQL 5.5.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-engines.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/show-engines.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (280,17,'>=','Syntax:\n>=\n\nGreater than or equal:\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html\n\n','mysql> SELECT 2 >= 2;\n -> 1\n','http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (281,4,'EXP','Syntax:\nEXP(X)\n\nReturns the value of e (the base of natural logarithms) raised to the\npower of X. The inverse of this function is LOG() (using a single\nargument only) or LN().\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html\n\n','mysql> SELECT EXP(2);\n -> 7.3890560989307\nmysql> SELECT EXP(-2);\n -> 0.13533528323661\nmysql> SELECT EXP(0);\n -> 1\n','http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (282,20,'LONGBLOB','LONGBLOB\n\nA BLOB column with a maximum length of 4,294,967,295 or 4GB (232 - 1)\nbytes. The effective maximum length of LONGBLOB columns depends on the\nconfigured maximum packet size in the client/server protocol and\navailable memory. Each LONGBLOB value is stored using a four-byte\nlength prefix that indicates the number of bytes in the value.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/string-type-overview.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (283,12,'POINTN','PointN(ls,N)\n\nReturns the N-th Point in the Linestring value ls. Points are numbered\nbeginning with 1.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#linestring-property-functions\n\n','mysql> SET @ls = \'LineString(1 1,2 2,3 3)\';\nmysql> SELECT AsText(PointN(GeomFromText(@ls),2));\n+-------------------------------------+\n| AsText(PointN(GeomFromText(@ls),2)) |\n+-------------------------------------+\n| POINT(2 2) |\n+-------------------------------------+\n','http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#linestring-property-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (284,20,'YEAR DATA TYPE','YEAR[(2|4)]\n\nA year in two-digit or four-digit format. The default is four-digit\nformat. In four-digit format, the allowable values are 1901 to 2155,\nand 0000. In two-digit format, the allowable values are 70 to 69,\nrepresenting years from 1970 to 2069. MySQL displays YEAR values in\nYYYY format, but allows you to assign values to YEAR columns using\neither strings or numbers.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-type-overview.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (285,16,'SUM','Syntax:\nSUM([DISTINCT] expr)\n\nReturns the sum of expr. If the return set has no rows, SUM() returns\nNULL. The DISTINCT keyword can be used in MySQL 5.1 to sum only the\ndistinct values of expr.\n\nSUM() returns NULL if there were no matching rows.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/group-by-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/group-by-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (286,4,'OCT','Syntax:\nOCT(N)\n\nReturns a string representation of the octal value of N, where N is a\nlonglong (BIGINT) number. This is equivalent to CONV(N,10,8). Returns\nNULL if N is NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html\n\n','mysql> SELECT OCT(12);\n -> \'14\'\n','http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (287,30,'SYSDATE','Syntax:\nSYSDATE()\n\nReturns the current date and time as a value in \'YYYY-MM-DD HH:MM:SS\'\nor YYYYMMDDHHMMSS.uuuuuu format, depending on whether the function is\nused in a string or numeric context.\n\nSYSDATE() returns the time at which it executes. This differs from the\nbehavior for NOW(), which returns a constant time that indicates the\ntime at which the statement began to execute. (Within a stored function\nor trigger, NOW() returns the time at which the function or triggering\nstatement began to execute.)\n\nmysql> SELECT NOW(), SLEEP(2), NOW();\n+---------------------+----------+---------------------+\n| NOW() | SLEEP(2) | NOW() |\n+---------------------+----------+---------------------+\n| 2006-04-12 13:47:36 | 0 | 2006-04-12 13:47:36 |\n+---------------------+----------+---------------------+\n\nmysql> SELECT SYSDATE(), SLEEP(2), SYSDATE();\n+---------------------+----------+---------------------+\n| SYSDATE() | SLEEP(2) | SYSDATE() |\n+---------------------+----------+---------------------+\n| 2006-04-12 13:47:44 | 0 | 2006-04-12 13:47:46 |\n+---------------------+----------+---------------------+\n\nIn addition, the SET TIMESTAMP statement affects the value returned by\nNOW() but not by SYSDATE(). This means that timestamp settings in the\nbinary log have no effect on invocations of SYSDATE().\n\nBecause SYSDATE() can return different values even within the same\nstatement, and is not affected by SET TIMESTAMP, it is nondeterministic\nand therefore unsafe for replication if statement-based binary logging\nis used. If that is a problem, you can use row-based logging.\n\nAlternatively, you can use the --sysdate-is-now option to cause\nSYSDATE() to be an alias for NOW(). This works if the option is used on\nboth the master and the slave.\n\nThe nondeterministic nature of SYSDATE() also means that indexes cannot\nbe used for evaluating expressions that refer to it.\n\nBeginning with MySQL 5.1.42, a warning is logged if you use this\nfunction when binlog_format is set to STATEMENT. (Bug#47995\n(http://bugs.mysql.com/bug.php?id=47995))\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (288,5,'UNINSTALL PLUGIN','Syntax:\nUNINSTALL PLUGIN plugin_name\n\nThis statement removes an installed server plugin. It requires the\nDELETE privilege for the mysql.plugin table.\n\nplugin_name must be the name of some plugin that is listed in the\nmysql.plugin table. The server executes the plugin\'s deinitialization\nfunction and removes the row for the plugin from the mysql.plugin\ntable, so that subsequent server restarts will not load and initialize\nthe plugin. UNINSTALL PLUGIN does not remove the plugin\'s shared\nlibrary file.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/uninstall-plugin.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/uninstall-plugin.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (289,31,'ASBINARY','AsBinary(g), AsWKB(g)\n\nConverts a value in internal geometry format to its WKB representation\nand returns the binary result.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/functions-to-convert-geometries-between-formats.html\n\n','SELECT AsBinary(g) FROM geom;\n','http://dev.mysql.com/doc/refman/5.1/en/functions-to-convert-geometries-between-formats.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (290,35,'REPEAT FUNCTION','Syntax:\nREPEAT(str,count)\n\nReturns a string consisting of the string str repeated count times. If\ncount is less than 1, returns an empty string. Returns NULL if str or\ncount are NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','mysql> SELECT REPEAT(\'MySQL\', 3);\n -> \'MySQLMySQLMySQL\'\n','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (291,25,'SHOW TABLES','Syntax:\nSHOW [FULL] TABLES [{FROM | IN} db_name]\n [LIKE \'pattern\' | WHERE expr]\n\nSHOW TABLES lists the non-TEMPORARY tables in a given database. You can\nalso get this list using the mysqlshow db_name command. The LIKE\nclause, if present, indicates which table names to match. The WHERE\nclause can be given to select rows using more general conditions, as\ndiscussed in http://dev.mysql.com/doc/refman/5.1/en/extended-show.html.\n\nThis statement also lists any views in the database. The FULL modifier\nis supported such that SHOW FULL TABLES displays a second output\ncolumn. Values for the second column are BASE TABLE for a table and\nVIEW for a view.\n\nIf you have no privileges for a base table or view, it does not show up\nin the output from SHOW TABLES or mysqlshow db_name.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-tables.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/show-tables.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (292,30,'MAKEDATE','Syntax:\nMAKEDATE(year,dayofyear)\n\nReturns a date, given year and day-of-year values. dayofyear must be\ngreater than 0 or the result is NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT MAKEDATE(2011,31), MAKEDATE(2011,32);\n -> \'2011-01-31\', \'2011-02-01\'\nmysql> SELECT MAKEDATE(2011,365), MAKEDATE(2014,365);\n -> \'2011-12-31\', \'2014-12-31\'\nmysql> SELECT MAKEDATE(2011,0);\n -> NULL\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (293,35,'BINARY OPERATOR','Syntax:\nBINARY\n\nThe BINARY operator casts the string following it to a binary string.\nThis is an easy way to force a column comparison to be done byte by\nbyte rather than character by character. This causes the comparison to\nbe case sensitive even if the column isn\'t defined as BINARY or BLOB.\nBINARY also causes trailing spaces to be significant.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/cast-functions.html\n\n','mysql> SELECT \'a\' = \'A\';\n -> 1\nmysql> SELECT BINARY \'a\' = \'A\';\n -> 0\nmysql> SELECT \'a\' = \'a \';\n -> 1\nmysql> SELECT BINARY \'a\' = \'a \';\n -> 0\n','http://dev.mysql.com/doc/refman/5.1/en/cast-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (294,6,'MBROVERLAPS','MBROverlaps(g1,g2)\n\nReturns 1 or 0 to indicate whether the Minimum Bounding Rectangles of\nthe two geometries g1 and g2 overlap. The term spatially overlaps is\nused if two geometries intersect and their intersection results in a\ngeometry of the same dimension but not equal to either of the given\ngeometries.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/relations-on-geometry-mbr.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/relations-on-geometry-mbr.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (295,35,'SOUNDEX','Syntax:\nSOUNDEX(str)\n\nReturns a soundex string from str. Two strings that sound almost the\nsame should have identical soundex strings. A standard soundex string\nis four characters long, but the SOUNDEX() function returns an\narbitrarily long string. You can use SUBSTRING() on the result to get a\nstandard soundex string. All nonalphabetic characters in str are\nignored. All international alphabetic characters outside the A-Z range\nare treated as vowels.\n\n*Important*: When using SOUNDEX(), you should be aware of the following\nlimitations:\n\no This function, as currently implemented, is intended to work well\n with strings that are in the English language only. Strings in other\n languages may not produce reliable results.\n\no This function is not guaranteed to provide consistent results with\n strings that use multi-byte character sets, including utf-8.\n\n We hope to remove these limitations in a future release. See\n Bug#22638 (http://bugs.mysql.com/bug.php?id=22638) for more\n information.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','mysql> SELECT SOUNDEX(\'Hello\');\n -> \'H400\'\nmysql> SELECT SOUNDEX(\'Quadratically\');\n -> \'Q36324\'\n','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (296,6,'MBRTOUCHES','MBRTouches(g1,g2)\n\nReturns 1 or 0 to indicate whether the Minimum Bounding Rectangles of\nthe two geometries g1 and g2 touch. Two geometries spatially touch if\nthe interiors of the geometries do not intersect, but the boundary of\none of the geometries intersects either the boundary or the interior of\nthe other.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/relations-on-geometry-mbr.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/relations-on-geometry-mbr.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (297,37,'DROP EVENT','Syntax:\nDROP EVENT [IF EXISTS] event_name\n\nThis statement drops the event named event_name. The event immediately\nceases being active, and is deleted completely from the server.\n\nIf the event does not exist, the error ERROR 1517 (HY000): Unknown\nevent \'event_name\' results. You can override this and cause the\nstatement to generate a warning for nonexistent events instead using IF\nEXISTS.\n\nBeginning with MySQL 5.1.12, this statement requires the EVENT\nprivilege for the schema to which the event to be dropped belongs. (In\nMySQL 5.1.11 and earlier, an event could be dropped only by its\ndefiner, or by a user having the SUPER privilege.)\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/drop-event.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/drop-event.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (298,26,'INSERT SELECT','Syntax:\nINSERT [LOW_PRIORITY | HIGH_PRIORITY] [IGNORE]\n [INTO] tbl_name [(col_name,...)]\n SELECT ...\n [ ON DUPLICATE KEY UPDATE col_name=expr, ... ]\n\nWith INSERT ... SELECT, you can quickly insert many rows into a table\nfrom one or many tables. For example:\n\nINSERT INTO tbl_temp2 (fld_id)\n SELECT tbl_temp1.fld_order_id\n FROM tbl_temp1 WHERE tbl_temp1.fld_order_id > 100;\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/insert-select.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/insert-select.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (299,37,'CREATE PROCEDURE','Syntax:\nCREATE\n [DEFINER = { user | CURRENT_USER }]\n PROCEDURE sp_name ([proc_parameter[,...]])\n [characteristic ...] routine_body\n\nCREATE\n [DEFINER = { user | CURRENT_USER }]\n FUNCTION sp_name ([func_parameter[,...]])\n RETURNS type\n [characteristic ...] routine_body\n\nproc_parameter:\n [ IN | OUT | INOUT ] param_name type\n\nfunc_parameter:\n param_name type\n\ntype:\n Any valid MySQL data type\n\ncharacteristic:\n LANGUAGE SQL\n | [NOT] DETERMINISTIC\n | { CONTAINS SQL | NO SQL | READS SQL DATA | MODIFIES SQL DATA }\n | SQL SECURITY { DEFINER | INVOKER }\n | COMMENT \'string\'\n\nroutine_body:\n Valid SQL procedure statement\n\nThese statements create stored routines. By default, a routine is\nassociated with the default database. To associate the routine\nexplicitly with a given database, specify the name as db_name.sp_name\nwhen you create it.\n\nThe CREATE FUNCTION statement is also used in MySQL to support UDFs\n(user-defined functions). See\nhttp://dev.mysql.com/doc/refman/5.1/en/adding-functions.html. A UDF can\nbe regarded as an external stored function. However, do note that\nstored functions share their namespace with UDFs. See\nhttp://dev.mysql.com/doc/refman/5.1/en/function-resolution.html, for\nthe rules describing how the server interprets references to different\nkinds of functions.\n\nTo invoke a stored procedure, use the CALL statement (see [HELP CALL]).\nTo invoke a stored function, refer to it in an expression. The function\nreturns a value during expression evaluation.\n\nTo execute the CREATE PROCEDURE or CREATE FUNCTION statement, it is\nnecessary to have the CREATE ROUTINE privilege. By default, MySQL\nautomatically grants the ALTER ROUTINE and EXECUTE privileges to the\nroutine creator. This behavior can be changed by disabling the\nautomatic_sp_privileges system variable. See\nhttp://dev.mysql.com/doc/refman/5.1/en/stored-routines-privileges.html.\nIf binary logging is enabled, the CREATE FUNCTION statement might also\nrequire the SUPER privilege, as described in\nhttp://dev.mysql.com/doc/refman/5.1/en/stored-programs-logging.html.\nSUPER may also be required depending on the DEFINER value, as described\nlater.\n\nThe DEFINER and SQL SECURITY clauses specify the security context to be\nused when checking access privileges at routine execution time, as\ndescribed later.\n\nIf the routine name is the same as the name of a built-in SQL function,\na syntax error occurs unless you use a space between the name and the\nfollowing parenthesis when defining the routine or invoking it later.\nFor this reason, avoid using the names of existing SQL functions for\nyour own stored routines.\n\nThe IGNORE_SPACE SQL mode applies to built-in functions, not to stored\nroutines. It is always allowable to have spaces after a stored routine\nname, regardless of whether IGNORE_SPACE is enabled.\n\nThe parameter list enclosed within parentheses must always be present.\nIf there are no parameters, an empty parameter list of () should be\nused. Parameter names are not case sensitive.\n\nEach parameter is an IN parameter by default. To specify otherwise for\na parameter, use the keyword OUT or INOUT before the parameter name.\n\n*Note*: Specifying a parameter as IN, OUT, or INOUT is valid only for a\nPROCEDURE. (FUNCTION parameters are always regarded as IN parameters.)\n\nAn IN parameter passes a value into a procedure. The procedure might\nmodify the value, but the modification is not visible to the caller\nwhen the procedure returns. An OUT parameter passes a value from the\nprocedure back to the caller. Its initial value is NULL within the\nprocedure, and its value is visible to the caller when the procedure\nreturns. An INOUT parameter is initialized by the caller, can be\nmodified by the procedure, and any change made by the procedure is\nvisible to the caller when the procedure returns.\n\nFor each OUT or INOUT parameter, pass a user-defined variable in the\nCALL statement that invokes the procedure so that you can obtain its\nvalue when the procedure returns. If you are calling the procedure from\nwithin another stored procedure or function, you can also pass a\nroutine parameter or local routine variable as an IN or INOUT\nparameter.\n\nThe following example shows a simple stored procedure that uses an OUT\nparameter:\n\nmysql> delimiter //\n\nmysql> CREATE PROCEDURE simpleproc (OUT param1 INT)\n -> BEGIN\n -> SELECT COUNT(*) INTO param1 FROM t;\n -> END//\nQuery OK, 0 rows affected (0.00 sec)\n\nmysql> delimiter ;\n\nmysql> CALL simpleproc(@a);\nQuery OK, 0 rows affected (0.00 sec)\n\nmysql> SELECT @a;\n+------+\n| @a |\n+------+\n| 3 |\n+------+\n1 row in set (0.00 sec)\n\nThe example uses the mysql client delimiter command to change the\nstatement delimiter from ; to // while the procedure is being defined.\nThis allows the ; delimiter used in the procedure body to be passed\nthrough to the server rather than being interpreted by mysql itself.\nSee\nhttp://dev.mysql.com/doc/refman/5.1/en/stored-programs-defining.html.\n\nThe RETURNS clause may be specified only for a FUNCTION, for which it\nis mandatory. It indicates the return type of the function, and the\nfunction body must contain a RETURN value statement. If the RETURN\nstatement returns a value of a different type, the value is coerced to\nthe proper type. For example, if a function specifies an ENUM or SET\nvalue in the RETURNS clause, but the RETURN statement returns an\ninteger, the value returned from the function is the string for the\ncorresponding ENUM member of set of SET members.\n\nThe following example function takes a parameter, performs an operation\nusing an SQL function, and returns the result. In this case, it is\nunnecessary to use delimiter because the function definition contains\nno internal ; statement delimiters:\n\nmysql> CREATE FUNCTION hello (s CHAR(20))\nmysql> RETURNS CHAR(50) DETERMINISTIC\n -> RETURN CONCAT(\'Hello, \',s,\'!\');\nQuery OK, 0 rows affected (0.00 sec)\n\nmysql> SELECT hello(\'world\');\n+----------------+\n| hello(\'world\') |\n+----------------+\n| Hello, world! |\n+----------------+\n1 row in set (0.00 sec)\n\nParameter types and function return types can be declared to use any\nvalid data type, except that the COLLATE attribute cannot be used.\n\nThe routine_body consists of a valid SQL procedure statement. This can\nbe a simple statement such as SELECT or INSERT, or it can be a compound\nstatement written using BEGIN and END. Compound statements can contain\ndeclarations, loops, and other control structure statements. The syntax\nfor these statements is described in\nhttp://dev.mysql.com/doc/refman/5.1/en/sql-syntax-compound-statements.h\ntml.\n\nMySQL allows routines to contain DDL statements, such as CREATE and\nDROP. MySQL also allows stored procedures (but not stored functions) to\ncontain SQL transaction statements such as COMMIT. Stored functions may\nnot contain statements that perform explicit or implicit commit or\nrollback. Support for these statements is not required by the SQL\nstandard, which states that each DBMS vendor may decide whether to\nallow them.\n\nStatements that return a result set can be used within a stored\nprocedcure but not within a stored function. This prohibition includes\nSELECT statements that do not have an INTO var_list clause and other\nstatements such as SHOW, EXPLAIN, and CHECK TABLE. For statements that\ncan be determined at function definition time to return a result set, a\nNot allowed to return a result set from a function error occurs\n(ER_SP_NO_RETSET). For statements that can be determined only at\nruntime to return a result set, a PROCEDURE %s can\'t return a result\nset in the given context error occurs (ER_SP_BADSELECT).\n\nUSE statements within stored routines are disallowed. When a routine is\ninvoked, an implicit USE db_name is performed (and undone when the\nroutine terminates). This causes the routine to have the given default\ndatabase while it executes. References to objects in databases other\nthan the routine default database should be qualified with the\nappropriate database name.\n\nFor additional information about statements that are not allowed in\nstored routines, see\nhttp://dev.mysql.com/doc/refman/5.1/en/stored-program-restrictions.html\n.\n\nFor information about invoking stored procedures from within programs\nwritten in a language that has a MySQL interface, see [HELP CALL].\n\nMySQL stores the sql_mode system variable setting that is in effect at\nthe time a routine is created, and always executes the routine with\nthis setting in force, regardless of the server SQL mode in effect when\nthe routine is invoked.\n\nThe switch from the SQL mode of the invoker to that of the routine\noccurs after evaluation of arguments and assignment of the resulting\nvalues to routine parameters. If you define a routine in strict SQL\nmode but invoke it in nonstrict mode, assignment of arguments to\nroutine parameters does not take place in strict mode. If you require\nthat expressions passed to a routine be assigned in strict SQL mode,\nyou should invoke the routine with strict mode in effect.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/create-procedure.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/create-procedure.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (300,20,'VARBINARY','VARBINARY(M)\n\nThe VARBINARY type is similar to the VARCHAR type, but stores binary\nbyte strings rather than nonbinary character strings. M represents the\nmaximum column length in bytes.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/string-type-overview.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (301,25,'LOAD INDEX','Syntax:\nLOAD INDEX INTO CACHE\n tbl_index_list [, tbl_index_list] ...\n\ntbl_index_list:\n tbl_name\n [[INDEX|KEY] (index_name[, index_name] ...)]\n [IGNORE LEAVES]\n\nThe LOAD INDEX INTO CACHE statement preloads a table index into the key\ncache to which it has been assigned by an explicit CACHE INDEX\nstatement, or into the default key cache otherwise. LOAD INDEX INTO\nCACHE is used only for MyISAM tables. It is not supported for tables\nhaving user-defined partitioning (see\nhttp://dev.mysql.com/doc/refman/5.1/en/partitioning-limitations.html.)\n\nThe IGNORE LEAVES modifier causes only blocks for the nonleaf nodes of\nthe index to be preloaded.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/load-index.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/load-index.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (302,26,'UNION','Syntax:\nSELECT ...\nUNION [ALL | DISTINCT] SELECT ...\n[UNION [ALL | DISTINCT] SELECT ...]\n\nUNION is used to combine the result from multiple SELECT statements\ninto a single result set.\n\nThe column names from the first SELECT statement are used as the column\nnames for the results returned. Selected columns listed in\ncorresponding positions of each SELECT statement should have the same\ndata type. (For example, the first column selected by the first\nstatement should have the same type as the first column selected by the\nother statements.)\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/union.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/union.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (303,30,'TO_DAYS','Syntax:\nTO_DAYS(date)\n\nGiven a date date, returns a day number (the number of days since year\n0).\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT TO_DAYS(950501);\n -> 728779\nmysql> SELECT TO_DAYS(\'2007-10-07\');\n -> 733321\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (304,35,'NOT REGEXP','Syntax:\nexpr NOT REGEXP pat, expr NOT RLIKE pat\n\nThis is the same as NOT (expr REGEXP pat).\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/regexp.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/regexp.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (305,25,'SHOW INDEX','Syntax:\nSHOW {INDEX | INDEXES | KEYS}\n {FROM | IN} tbl_name\n [{FROM | IN} db_name]\n\nSHOW INDEX returns table index information. The format resembles that\nof the SQLStatistics call in ODBC.\nYou can use db_name.tbl_name as an alternative to the tbl_name FROM\ndb_name syntax. These two statements are equivalent:\n\nSHOW INDEX FROM mytable FROM mydb;\nSHOW INDEX FROM mydb.mytable;\n\nYou can also list a table\'s indexes with the mysqlshow -k db_name\ntbl_name command.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-index.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/show-index.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (306,25,'SHOW CREATE DATABASE','Syntax:\nSHOW CREATE {DATABASE | SCHEMA} db_name\n\nShows the CREATE DATABASE statement that creates the given database.\nSHOW CREATE SCHEMA is a synonym for SHOW CREATE DATABASE.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-create-database.html\n\n','mysql> SHOW CREATE DATABASE test\\G\n*************************** 1. row ***************************\n Database: test\nCreate Database: CREATE DATABASE `test`\n /*!40100 DEFAULT CHARACTER SET latin1 */\n\nmysql> SHOW CREATE SCHEMA test\\G\n*************************** 1. row ***************************\n Database: test\nCreate Database: CREATE DATABASE `test`\n /*!40100 DEFAULT CHARACTER SET latin1 */\n','http://dev.mysql.com/doc/refman/5.1/en/show-create-database.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (307,22,'LEAVE','Syntax:\nLEAVE label\n\nThis statement is used to exit the flow control construct that has the\ngiven label. It can be used within BEGIN ... END or loop constructs\n(LOOP, REPEAT, WHILE).\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/leave-statement.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/leave-statement.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (308,17,'NOT IN','Syntax:\nexpr NOT IN (value,...)\n\nThis is the same as NOT (expr IN (value,...)).\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (309,13,'!','Syntax:\nNOT, !\n\nLogical NOT. Evaluates to 1 if the operand is 0, to 0 if the operand is\nnonzero, and NOT NULL returns NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/logical-operators.html\n\n','mysql> SELECT NOT 10;\n -> 0\nmysql> SELECT NOT 0;\n -> 1\nmysql> SELECT NOT NULL;\n -> NULL\nmysql> SELECT ! (1+1);\n -> 0\nmysql> SELECT ! 1+1;\n -> 1\n','http://dev.mysql.com/doc/refman/5.1/en/logical-operators.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (310,22,'DECLARE HANDLER','Syntax:\nDECLARE handler_type HANDLER\n FOR condition_value [, condition_value] ...\n statement\n\nhandler_type:\n CONTINUE\n | EXIT\n | UNDO\n\ncondition_value:\n SQLSTATE [VALUE] sqlstate_value\n | condition_name\n | SQLWARNING\n | NOT FOUND\n | SQLEXCEPTION\n | mysql_error_code\n\nThe DECLARE ... HANDLER statement specifies handlers that each may deal\nwith one or more conditions. If one of these conditions occurs, the\nspecified statement is executed. statement can be a simple statement\n(for example, SET var_name = value), or it can be a compound statement\nwritten using BEGIN and END (see [HELP BEGIN END]).\n\nFor a CONTINUE handler, execution of the current program continues\nafter execution of the handler statement. For an EXIT handler,\nexecution terminates for the BEGIN ... END compound statement in which\nthe handler is declared. (This is true even if the condition occurs in\nan inner block.) The UNDO handler type statement is not supported.\n\nIf a condition occurs for which no handler has been declared, the\ndefault action is EXIT.\n\nA condition_value for DECLARE ... HANDLER can be any of the following\nvalues:\n\no An SQLSTATE value (a 5-character string literal) or a MySQL error\n code (a number). You should not use SQLSTATE value \'00000\' or MySQL\n error code 0, because those indicate sucess rather than an error\n condition. For a list of SQLSTATE values and MySQL error codes, see\n http://dev.mysql.com/doc/refman/5.1/en/error-messages-server.html.\n\no A condition name previously specified with DECLARE ... CONDITION. See\n [HELP DECLARE CONDITION].\n\no SQLWARNING is shorthand for the class of SQLSTATE values that begin\n with \'01\'.\n\no NOT FOUND is shorthand for the class of SQLSTATE values that begin\n with \'02\'. This is relevant only the context of cursors and is used\n to control what happens when a cursor reaches the end of a data set.\n If no more rows are available, a No Data condition occurs with\n SQLSTATE value 02000. To detect this condition, you can set up a\n handler for it (or for a NOT FOUND condition). An example is shown in\n http://dev.mysql.com/doc/refman/5.1/en/cursors.html. This condition\n also occurs for SELECT ... INTO var_list statements that retrieve no\n rows.\n\no SQLEXCEPTION is shorthand for the class of SQLSTATE values that do\n not begin with \'00\', \'01\', or \'02\'.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/declare-handler.html\n\n','mysql> CREATE TABLE test.t (s1 INT, PRIMARY KEY (s1));\nQuery OK, 0 rows affected (0.00 sec)\n\nmysql> delimiter //\n\nmysql> CREATE PROCEDURE handlerdemo ()\n -> BEGIN\n -> DECLARE CONTINUE HANDLER FOR SQLSTATE \'23000\' SET @x2 = 1;\n -> SET @x = 1;\n -> INSERT INTO test.t VALUES (1);\n -> SET @x = 2;\n -> INSERT INTO test.t VALUES (1);\n -> SET @x = 3;\n -> END;\n -> //\nQuery OK, 0 rows affected (0.00 sec)\n\nmysql> CALL handlerdemo()//\nQuery OK, 0 rows affected (0.00 sec)\n\nmysql> SELECT @x//\n +------+\n | @x |\n +------+\n | 3 |\n +------+\n 1 row in set (0.00 sec)\n','http://dev.mysql.com/doc/refman/5.1/en/declare-handler.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (311,20,'DOUBLE','DOUBLE[(M,D)] [UNSIGNED] [ZEROFILL]\n\nA normal-size (double-precision) floating-point number. Allowable\nvalues are -1.7976931348623157E+308 to -2.2250738585072014E-308, 0, and\n2.2250738585072014E-308 to 1.7976931348623157E+308. These are the\ntheoretical limits, based on the IEEE standard. The actual range might\nbe slightly smaller depending on your hardware or operating system.\n\nM is the total number of digits and D is the number of digits following\nthe decimal point. If M and D are omitted, values are stored to the\nlimits allowed by the hardware. A double-precision floating-point\nnumber is accurate to approximately 15 decimal places.\n\nUNSIGNED, if specified, disallows negative values.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/numeric-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/numeric-type-overview.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (312,20,'TIME','TIME\n\nA time. The range is \'-838:59:59\' to \'838:59:59\'. MySQL displays TIME\nvalues in \'HH:MM:SS\' format, but allows assignment of values to TIME\ncolumns using either strings or numbers.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-type-overview.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (313,13,'&&','Syntax:\nAND, &&\n\nLogical AND. Evaluates to 1 if all operands are nonzero and not NULL,\nto 0 if one or more operands are 0, otherwise NULL is returned.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/logical-operators.html\n\n','mysql> SELECT 1 && 1;\n -> 1\nmysql> SELECT 1 && 0;\n -> 0\nmysql> SELECT 1 && NULL;\n -> NULL\nmysql> SELECT 0 && NULL;\n -> 0\nmysql> SELECT NULL && 0;\n -> 0\n','http://dev.mysql.com/doc/refman/5.1/en/logical-operators.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (314,10,'X','X(p)\n\nReturns the X-coordinate value for the point p as a double-precision\nnumber.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#point-property-functions\n\n','mysql> SET @pt = \'Point(56.7 53.34)\';\nmysql> SELECT X(GeomFromText(@pt));\n+----------------------+\n| X(GeomFromText(@pt)) |\n+----------------------+\n| 56.7 |\n+----------------------+\n','http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#point-property-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (315,15,'FOUND_ROWS','Syntax:\nFOUND_ROWS()\n\nA SELECT statement may include a LIMIT clause to restrict the number of\nrows the server returns to the client. In some cases, it is desirable\nto know how many rows the statement would have returned without the\nLIMIT, but without running the statement again. To obtain this row\ncount, include a SQL_CALC_FOUND_ROWS option in the SELECT statement,\nand then invoke FOUND_ROWS() afterward:\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/information-functions.html\n\n','mysql> SELECT SQL_CALC_FOUND_ROWS * FROM tbl_name\n -> WHERE id > 100 LIMIT 10;\nmysql> SELECT FOUND_ROWS();\n','http://dev.mysql.com/doc/refman/5.1/en/information-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (316,15,'SYSTEM_USER','Syntax:\nSYSTEM_USER()\n\nSYSTEM_USER() is a synonym for USER().\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/information-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/information-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (317,29,'CROSSES','Crosses(g1,g2)\n\nReturns 1 if g1 spatially crosses g2. Returns NULL if g1 is a Polygon\nor a MultiPolygon, or if g2 is a Point or a MultiPoint. Otherwise,\nreturns 0.\n\nThe term spatially crosses denotes a spatial relation between two given\ngeometries that has the following properties:\n\no The two geometries intersect\n\no Their intersection results in a geometry that has a dimension that is\n one less than the maximum dimension of the two given geometries\n\no Their intersection is not equal to either of the two given geometries\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/functions-that-test-spatial-relationships-between-geometries.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/functions-that-test-spatial-relationships-between-geometries.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (318,26,'TRUNCATE TABLE','Syntax:\nTRUNCATE [TABLE] tbl_name\n\nTRUNCATE TABLE empties a table completely. It requires the DROP\nprivilege as of MySQL 5.1.16. (Before 5.1.16, it requires the DELETE\nprivilege).\n\nLogically, TRUNCATE TABLE is equivalent to a DELETE statement that\ndeletes all rows, but there are practical differences under some\ncircumstances.\n\nFor an InnoDB table, InnoDB processes TRUNCATE TABLE by deleting rows\none by one if there are any FOREIGN KEY constraints that reference the\ntable. If there are no FOREIGN KEY constraints, InnoDB performs fast\ntruncation by dropping the original table and creating an empty one\nwith the same definition, which is much faster than deleting rows one\nby one. The AUTO_INCREMENT counter is reset to zero by TRUNCATE TABLE,\nregardless of whether there is a FOREIGN KEY constraint.\n\nIn the case that FOREIGN KEY constraints reference the table, InnoDB\ndeletes rows one by one and processes the constraints on each one. If\nthe FOREIGN KEY constraint specifies DELETE CASCADE, rows from the\nchild (referenced) table are deleted, and the truncated table becomes\nempty. If the FOREIGN KEY constraint does not specify CASCADE, the\nTRUNCATE TABLE statement deletes rows one by one and stops if it\nencounters a parent row that is referenced by the child, returning this\nerror:\n\nERROR 1451 (23000): Cannot delete or update a parent row: a foreign\nkey constraint fails (`test`.`child`, CONSTRAINT `child_ibfk_1`\nFOREIGN KEY (`parent_id`) REFERENCES `parent` (`id`))\n\nThis is the same as a DELETE statement with no WHERE clause.\n\nThe count of rows affected by TRUNCATE TABLE is accurate only when it\nis mapped to a DELETE statement.\n\nFor other storage engines, TRUNCATE TABLE differs from DELETE in the\nfollowing ways in MySQL 5.1:\n\no Truncate operations drop and re-create the table, which is much\n faster than deleting rows one by one, particularly for large tables.\n\no Truncate operations cause an implicit commit.\n\no Truncation operations cannot be performed if the session holds an\n active table lock.\n\no Truncation operations do not return a meaningful value for the number\n of deleted rows. The usual result is "0 rows affected," which should\n be interpreted as "no information."\n\no As long as the table format file tbl_name.frm is valid, the table can\n be re-created as an empty table with TRUNCATE TABLE, even if the data\n or index files have become corrupted.\n\no The table handler does not remember the last used AUTO_INCREMENT\n value, but starts counting from the beginning. This is true even for\n MyISAM and InnoDB, which normally do not reuse sequence values.\n\no When used with partitioned tables, TRUNCATE TABLE preserves the\n partitioning; that is, the data and index files are dropped and\n re-created, while the partition definitions (.par) file is\n unaffected.\n\no Since truncation of a table does not make any use of DELETE, the\n TRUNCATE TABLE statement does not invoke ON DELETE triggers.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/truncate-table.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/truncate-table.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (319,16,'BIT_XOR','Syntax:\nBIT_XOR(expr)\n\nReturns the bitwise XOR of all bits in expr. The calculation is\nperformed with 64-bit (BIGINT) precision.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/group-by-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/group-by-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (320,30,'CURRENT_DATE','Syntax:\nCURRENT_DATE, CURRENT_DATE()\n\nCURRENT_DATE and CURRENT_DATE() are synonyms for CURDATE().\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (321,25,'START SLAVE','Syntax:\nSTART SLAVE [thread_type [, thread_type] ... ]\nSTART SLAVE [SQL_THREAD] UNTIL\n MASTER_LOG_FILE = \'log_name\', MASTER_LOG_POS = log_pos\nSTART SLAVE [SQL_THREAD] UNTIL\n RELAY_LOG_FILE = \'log_name\', RELAY_LOG_POS = log_pos\n\nthread_type: IO_THREAD | SQL_THREAD\n\nSTART SLAVE with no thread_type options starts both of the slave\nthreads. The I/O thread reads events from the master server and stores\nthem in the relay log. The SQL thread reads events from the relay log\nand executes them. START SLAVE requires the SUPER privilege.\n\nIf START SLAVE succeeds in starting the slave threads, it returns\nwithout any error. However, even in that case, it might be that the\nslave threads start and then later stop (for example, because they do\nnot manage to connect to the master or read its binary log, or some\nother problem). START SLAVE does not warn you about this. You must\ncheck the slave\'s error log for error messages generated by the slave\nthreads, or check that they are running satisfactorily with SHOW SLAVE\nSTATUS.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/start-slave.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/start-slave.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (322,2,'AREA','Area(poly)\n\nReturns as a double-precision number the area of the Polygon value\npoly, as measured in its spatial reference system.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#polygon-property-functions\n\n','mysql> SET @poly = \'Polygon((0 0,0 3,3 0,0 0),(1 1,1 2,2 1,1 1))\';\nmysql> SELECT Area(GeomFromText(@poly));\n+---------------------------+\n| Area(GeomFromText(@poly)) |\n+---------------------------+\n| 4 |\n+---------------------------+\n','http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#polygon-property-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (323,22,'BEGIN END','Syntax:\n[begin_label:] BEGIN\n [statement_list]\nEND [end_label]\n\nBEGIN ... END syntax is used for writing compound statements, which can\nappear within stored programs. A compound statement can contain\nmultiple statements, enclosed by the BEGIN and END keywords.\nstatement_list represents a list of one or more statements, each\nterminated by a semicolon (;) statement delimiter. statement_list is\noptional, which means that the empty compound statement (BEGIN END) is\nlegal.\n\nUse of multiple statements requires that a client is able to send\nstatement strings containing the ; statement delimiter. This is handled\nin the mysql command-line client with the delimiter command. Changing\nthe ; end-of-statement delimiter (for example, to //) allows ; to be\nused in a program body. For an example, see\nhttp://dev.mysql.com/doc/refman/5.1/en/stored-programs-defining.html.\n\nA BEGIN ... END block can be labeled. Labels follow these rules:\n\no end_label cannot be given unless begin_label is also present.\n\no If both begin_label and end_label are present, they must be the same.\n\no Labels can be up to 16 characters long.\n\nLabels are also allowed for the LOOP, REPEAT, and WHILE statements.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/begin-end.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/begin-end.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (324,25,'FLUSH','Syntax:\nFLUSH [NO_WRITE_TO_BINLOG | LOCAL]\n flush_option [, flush_option] ...\n\nThe FLUSH statement clears or reloads various internal caches used by\nMySQL. One variant acquires a lock. To execute FLUSH, you must have the\nRELOAD privilege.\n\nBy default, FLUSH statements are written to the binary log so that they\nwill be replicated to replication slaves. Logging can be suppressed\nwith the optional NO_WRITE_TO_BINLOG keyword or its alias LOCAL.\n\n*Note*: FLUSH LOGS, FLUSH MASTER, FLUSH SLAVE, and FLUSH TABLES WITH\nREAD LOCK are not written to the binary log in any case because they\nwould cause problems if replicated to a slave.\n\nThe RESET statement is similar to FLUSH. See [HELP RESET], for\ninformation about using the RESET statement with replication.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/flush.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/flush.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (325,25,'SHOW PROCEDURE STATUS','Syntax:\nSHOW PROCEDURE STATUS\n [LIKE \'pattern\' | WHERE expr]\n\nThis statement is a MySQL extension. It returns characteristics of a\nstored procedure, such as the database, name, type, creator, creation\nand modification dates, and character set information. A similar\nstatement, SHOW FUNCTION STATUS, displays information about stored\nfunctions (see [HELP SHOW FUNCTION STATUS]).\n\nThe LIKE clause, if present, indicates which procedure or function\nnames to match. The WHERE clause can be given to select rows using more\ngeneral conditions, as discussed in\nhttp://dev.mysql.com/doc/refman/5.1/en/extended-show.html.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-procedure-status.html\n\n','mysql> SHOW PROCEDURE STATUS LIKE \'sp1\'\\G\n*************************** 1. row ***************************\n Db: test\n Name: sp1\n Type: PROCEDURE\n Definer: testuser@localhost\n Modified: 2004-08-03 15:29:37\n Created: 2004-08-03 15:29:37\n Security_type: DEFINER\n Comment:\ncharacter_set_client: latin1\ncollation_connection: latin1_swedish_ci\n Database Collation: latin1_swedish_ci\n','http://dev.mysql.com/doc/refman/5.1/en/show-procedure-status.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (326,27,'DESCRIBE','Syntax:\n{DESCRIBE | DESC} tbl_name [col_name | wild]\n\nDESCRIBE provides information about the columns in a table. It is a\nshortcut for SHOW COLUMNS FROM. These statements also display\ninformation for views. (See [HELP SHOW COLUMNS].)\n\ncol_name can be a column name, or a string containing the SQL "%" and\n"_" wildcard characters to obtain output only for the columns with\nnames matching the string. There is no need to enclose the string\nwithin quotes unless it contains spaces or other special characters.\n\nmysql> DESCRIBE City;\n+------------+----------+------+-----+---------+----------------+\n| Field | Type | Null | Key | Default | Extra |\n+------------+----------+------+-----+---------+----------------+\n| Id | int(11) | NO | PRI | NULL | auto_increment |\n| Name | char(35) | NO | | | |\n| Country | char(3) | NO | UNI | | |\n| District | char(20) | YES | MUL | | |\n| Population | int(11) | NO | | 0 | |\n+------------+----------+------+-----+---------+----------------+\n5 rows in set (0.00 sec)\n\nThe description for SHOW COLUMNS provides more information about the\noutput columns (see [HELP SHOW COLUMNS]).\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/describe.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/describe.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (327,25,'SHOW WARNINGS','Syntax:\nSHOW WARNINGS [LIMIT [offset,] row_count]\nSHOW COUNT(*) WARNINGS\n\nSHOW WARNINGS shows the error, warning, and note messages that resulted\nfrom the last statement that generated messages in the current session.\nIt shows nothing if the last statement used a table and generated no\nmessages. (That is, a statement that uses a table but generates no\nmessages clears the message list.) Statements that do not use tables\nand do not generate messages have no effect on the message list.\n\nWarnings are generated for DML statements such as INSERT, UPDATE, and\nLOAD DATA INFILE as well as DDL statements such as CREATE TABLE and\nALTER TABLE.\n\nA related statement, SHOW ERRORS, shows only the errors. See [HELP SHOW\nERRORS].\n\nThe SHOW COUNT(*) WARNINGS statement displays the total number of\nerrors, warnings, and notes. You can also retrieve this number from the\nwarning_count variable:\n\nSHOW COUNT(*) WARNINGS;\nSELECT @@warning_count;\n\nThe value of warning_count might be greater than the number of messages\ndisplayed by SHOW WARNINGS if the max_error_count system variable is\nset so low that not all messages are stored. An example shown later in\nthis section demonstrates how this can happen.\n\nThe LIMIT clause has the same syntax as for the SELECT statement. See\nhttp://dev.mysql.com/doc/refman/5.1/en/select.html.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-warnings.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/show-warnings.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (328,9,'DROP USER','Syntax:\nDROP USER user [, user] ...\n\nThe DROP USER statement removes one or more MySQL accounts. It removes\nprivilege rows for the account from all grant tables. To use this\nstatement, you must have the global CREATE USER privilege or the DELETE\nprivilege for the mysql database. Each account is named using the same\nformat as for the GRANT statement; for example, \'jeffrey\'@\'localhost\'.\nIf you specify only the user name part of the account name, a host name\npart of \'%\' is used. For additional information about specifying\naccount names, see [HELP GRANT].\n\nWith DROP USER, you can remove an account and its privileges as\nfollows:\n\nDROP USER user;\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/drop-user.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/drop-user.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (329,16,'STDDEV_POP','Syntax:\nSTDDEV_POP(expr)\n\nReturns the population standard deviation of expr (the square root of\nVAR_POP()). You can also use STD() or STDDEV(), which are equivalent\nbut not standard SQL.\n\nSTDDEV_POP() returns NULL if there were no matching rows.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/group-by-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/group-by-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (330,25,'SHOW CHARACTER SET','Syntax:\nSHOW CHARACTER SET\n [LIKE \'pattern\' | WHERE expr]\n\nThe SHOW CHARACTER SET statement shows all available character sets.\nThe LIKE clause, if present, indicates which character set names to\nmatch. The WHERE clause can be given to select rows using more general\nconditions, as discussed in\nhttp://dev.mysql.com/doc/refman/5.1/en/extended-show.html. For example:\n\nmysql> SHOW CHARACTER SET LIKE \'latin%\';\n+---------+-----------------------------+-------------------+--------+\n| Charset | Description | Default collation | Maxlen |\n+---------+-----------------------------+-------------------+--------+\n| latin1 | cp1252 West European | latin1_swedish_ci | 1 |\n| latin2 | ISO 8859-2 Central European | latin2_general_ci | 1 |\n| latin5 | ISO 8859-9 Turkish | latin5_turkish_ci | 1 |\n| latin7 | ISO 8859-13 Baltic | latin7_general_ci | 1 |\n+---------+-----------------------------+-------------------+--------+\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-character-set.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/show-character-set.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (331,35,'SUBSTRING','Syntax:\nSUBSTRING(str,pos), SUBSTRING(str FROM pos), SUBSTRING(str,pos,len),\nSUBSTRING(str FROM pos FOR len)\n\nThe forms without a len argument return a substring from string str\nstarting at position pos. The forms with a len argument return a\nsubstring len characters long from string str, starting at position\npos. The forms that use FROM are standard SQL syntax. It is also\npossible to use a negative value for pos. In this case, the beginning\nof the substring is pos characters from the end of the string, rather\nthan the beginning. A negative value may be used for pos in any of the\nforms of this function.\n\nFor all forms of SUBSTRING(), the position of the first character in\nthe string from which the substring is to be extracted is reckoned as\n1.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','mysql> SELECT SUBSTRING(\'Quadratically\',5);\n -> \'ratically\'\nmysql> SELECT SUBSTRING(\'foobarbar\' FROM 4);\n -> \'barbar\'\nmysql> SELECT SUBSTRING(\'Quadratically\',5,6);\n -> \'ratica\'\nmysql> SELECT SUBSTRING(\'Sakila\', -3);\n -> \'ila\'\nmysql> SELECT SUBSTRING(\'Sakila\', -5, 3);\n -> \'aki\'\nmysql> SELECT SUBSTRING(\'Sakila\' FROM -4 FOR 2);\n -> \'ki\'\n','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (332,34,'ISEMPTY','IsEmpty(g)\n\nReturns 1 if the geometry value g is the empty geometry, 0 if it is not\nempty, and -1 if the argument is NULL. If the geometry is empty, it\nrepresents the empty point set.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#general-geometry-property-functions\n\n','','http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#general-geometry-property-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (333,25,'SHOW FUNCTION STATUS','Syntax:\nSHOW FUNCTION STATUS\n [LIKE \'pattern\' | WHERE expr]\n\nThis statement is similar to SHOW PROCEDURE STATUS but for stored\nfunctions. See [HELP SHOW PROCEDURE STATUS].\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-function-status.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/show-function-status.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (334,35,'LTRIM','Syntax:\nLTRIM(str)\n\nReturns the string str with leading space characters removed.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','mysql> SELECT LTRIM(\' barbar\');\n -> \'barbar\'\n','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (335,29,'INTERSECTS','Intersects(g1,g2)\n\nReturns 1 or 0 to indicate whether g1 spatially intersects g2.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/functions-that-test-spatial-relationships-between-geometries.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/functions-that-test-spatial-relationships-between-geometries.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (336,26,'CALL','Syntax:\nCALL sp_name([parameter[,...]])\nCALL sp_name[()]\n\nThe CALL statement invokes a stored procedure that was defined\npreviously with CREATE PROCEDURE.\n\nAs of MySQL 5.1.13, stored procedures that take no arguments can be\ninvoked without parentheses. That is, CALL p() and CALL p are\nequivalent.\n\nCALL can pass back values to its caller using parameters that are\ndeclared as OUT or INOUT parameters. When the procedure returns, a\nclient program can also obtain the number of rows affected for the\nfinal statement executed within the routine: At the SQL level, call the\nROW_COUNT() function; from the C API, call the mysql_affected_rows()\nfunction.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/call.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/call.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (337,6,'MBRDISJOINT','MBRDisjoint(g1,g2)\n\nReturns 1 or 0 to indicate whether the Minimum Bounding Rectangles of\nthe two geometries g1 and g2 are disjoint (do not intersect).\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/relations-on-geometry-mbr.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/relations-on-geometry-mbr.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (338,14,'VALUES','Syntax:\nVALUES(col_name)\n\nIn an INSERT ... ON DUPLICATE KEY UPDATE statement, you can use the\nVALUES(col_name) function in the UPDATE clause to refer to column\nvalues from the INSERT portion of the statement. In other words,\nVALUES(col_name) in the UPDATE clause refers to the value of col_name\nthat would be inserted, had no duplicate-key conflict occurred. This\nfunction is especially useful in multiple-row inserts. The VALUES()\nfunction is meaningful only in INSERT ... ON DUPLICATE KEY UPDATE\nstatements and returns NULL otherwise.\nhttp://dev.mysql.com/doc/refman/5.1/en/insert-on-duplicate.html.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/miscellaneous-functions.html\n\n','mysql> INSERT INTO table (a,b,c) VALUES (1,2,3),(4,5,6)\n -> ON DUPLICATE KEY UPDATE c=VALUES(a)+VALUES(b);\n','http://dev.mysql.com/doc/refman/5.1/en/miscellaneous-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (339,35,'SUBSTRING_INDEX','Syntax:\nSUBSTRING_INDEX(str,delim,count)\n\nReturns the substring from string str before count occurrences of the\ndelimiter delim. If count is positive, everything to the left of the\nfinal delimiter (counting from the left) is returned. If count is\nnegative, everything to the right of the final delimiter (counting from\nthe right) is returned. SUBSTRING_INDEX() performs a case-sensitive\nmatch when searching for delim.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','mysql> SELECT SUBSTRING_INDEX(\'www.mysql.com\', \'.\', 2);\n -> \'www.mysql\'\nmysql> SELECT SUBSTRING_INDEX(\'www.mysql.com\', \'.\', -2);\n -> \'mysql.com\'\n','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (340,11,'ENCODE','Syntax:\nENCODE(str,pass_str)\n\nEncrypt str using pass_str as the password. To decrypt the result, use\nDECODE().\n\nThe result is a binary string of the same length as str.\n\nThe strength of the encryption is based on how good the random\ngenerator is. It should suffice for short strings.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/encryption-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/encryption-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (341,22,'LOOP','Syntax:\n[begin_label:] LOOP\n statement_list\nEND LOOP [end_label]\n\nLOOP implements a simple loop construct, enabling repeated execution of\nthe statement list, which consists of one or more statements, each\nterminated by a semicolon (;) statement delimiter. The statements\nwithin the loop are repeated until the loop is exited; usually this is\naccomplished with a LEAVE statement.\n\nA LOOP statement can be labeled. See [HELP BEGIN END] for the rules\nregarding label use.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/loop-statement.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/loop-statement.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (342,4,'TRUNCATE','Syntax:\nTRUNCATE(X,D)\n\nReturns the number X, truncated to D decimal places. If D is 0, the\nresult has no decimal point or fractional part. D can be negative to\ncause D digits left of the decimal point of the value X to become zero.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html\n\n','mysql> SELECT TRUNCATE(1.223,1);\n -> 1.2\nmysql> SELECT TRUNCATE(1.999,1);\n -> 1.9\nmysql> SELECT TRUNCATE(1.999,0);\n -> 1\nmysql> SELECT TRUNCATE(-1.999,1);\n -> -1.9\nmysql> SELECT TRUNCATE(122,-2);\n -> 100\nmysql> SELECT TRUNCATE(10.28*100,0);\n -> 1028\n','http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (343,30,'TIMESTAMPADD','Syntax:\nTIMESTAMPADD(unit,interval,datetime_expr)\n\nAdds the integer expression interval to the date or datetime expression\ndatetime_expr. The unit for interval is given by the unit argument,\nwhich should be one of the following values: FRAC_SECOND\n(microseconds), SECOND, MINUTE, HOUR, DAY, WEEK, MONTH, QUARTER, or\nYEAR.\n\nBeginning with MySQL 5.1.24, it is possible to use MICROSECOND in place\nof FRAC_SECOND with this function, and FRAC_SECOND is deprecated.\nFRAC_SECOND is removed in MySQL 5.5.\n\nThe unit value may be specified using one of keywords as shown, or with\na prefix of SQL_TSI_. For example, DAY and SQL_TSI_DAY both are legal.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT TIMESTAMPADD(MINUTE,1,\'2003-01-02\');\n -> \'2003-01-02 00:01:00\'\nmysql> SELECT TIMESTAMPADD(WEEK,1,\'2003-01-02\');\n -> \'2003-01-09\'\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (344,25,'SHOW','SHOW has many forms that provide information about databases, tables,\ncolumns, or status information about the server. This section describes\nthose following:\n\nSHOW AUTHORS\nSHOW CHARACTER SET [like_or_where]\nSHOW COLLATION [like_or_where]\nSHOW [FULL] COLUMNS FROM tbl_name [FROM db_name] [like_or_where]\nSHOW CONTRIBUTORS\nSHOW CREATE DATABASE db_name\nSHOW CREATE EVENT event_name\nSHOW CREATE FUNCTION func_name\nSHOW CREATE PROCEDURE proc_name\nSHOW CREATE TABLE tbl_name\nSHOW CREATE TRIGGER trigger_name\nSHOW CREATE VIEW view_name\nSHOW DATABASES [like_or_where]\nSHOW ENGINE engine_name {STATUS | MUTEX}\nSHOW [STORAGE] ENGINES\nSHOW ERRORS [LIMIT [offset,] row_count]\nSHOW EVENTS\nSHOW FUNCTION CODE func_name\nSHOW FUNCTION STATUS [like_or_where]\nSHOW GRANTS FOR user\nSHOW INDEX FROM tbl_name [FROM db_name]\nSHOW INNODB STATUS\nSHOW OPEN TABLES [FROM db_name] [like_or_where]\nSHOW PLUGINS\nSHOW PROCEDURE CODE proc_name\nSHOW PROCEDURE STATUS [like_or_where]\nSHOW PRIVILEGES\nSHOW [FULL] PROCESSLIST\nSHOW PROFILE [types] [FOR QUERY n] [OFFSET n] [LIMIT n]\nSHOW PROFILES\nSHOW SCHEDULER STATUS\nSHOW [GLOBAL | SESSION] STATUS [like_or_where]\nSHOW TABLE STATUS [FROM db_name] [like_or_where]\nSHOW [FULL] TABLES [FROM db_name] [like_or_where]\nSHOW TRIGGERS [FROM db_name] [like_or_where]\nSHOW [GLOBAL | SESSION] VARIABLES [like_or_where]\nSHOW WARNINGS [LIMIT [offset,] row_count]\n\nlike_or_where:\n LIKE \'pattern\'\n | WHERE expr\n\nIf the syntax for a given SHOW statement includes a LIKE \'pattern\'\npart, \'pattern\' is a string that can contain the SQL "%" and "_"\nwildcard characters. The pattern is useful for restricting statement\noutput to matching values.\n\nSeveral SHOW statements also accept a WHERE clause that provides more\nflexibility in specifying which rows to display. See\nhttp://dev.mysql.com/doc/refman/5.1/en/extended-show.html.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/show.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (345,17,'GREATEST','Syntax:\nGREATEST(value1,value2,...)\n\nWith two or more arguments, returns the largest (maximum-valued)\nargument. The arguments are compared using the same rules as for\nLEAST().\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html\n\n','mysql> SELECT GREATEST(2,0);\n -> 2\nmysql> SELECT GREATEST(34.0,3.0,5.0,767.0);\n -> 767.0\nmysql> SELECT GREATEST(\'B\',\'A\',\'C\');\n -> \'C\'\n','http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (346,25,'SHOW VARIABLES','Syntax:\nSHOW [GLOBAL | SESSION] VARIABLES\n [LIKE \'pattern\' | WHERE expr]\n\nSHOW VARIABLES shows the values of MySQL system variables. This\ninformation also can be obtained using the mysqladmin variables\ncommand. The LIKE clause, if present, indicates which variable names to\nmatch. The WHERE clause can be given to select rows using more general\nconditions, as discussed in\nhttp://dev.mysql.com/doc/refman/5.1/en/extended-show.html. This\nstatement does not require any privilege. It requires only the ability\nto connect to the server.\n\nWith the GLOBAL modifier, SHOW VARIABLES displays the values that are\nused for new connections to MySQL. With SESSION, it displays the values\nthat are in effect for the current connection. If no modifier is\npresent, the default is SESSION. LOCAL is a synonym for SESSION.\nWith a LIKE clause, the statement displays only rows for those\nvariables with names that match the pattern. To obtain the row for a\nspecific variable, use a LIKE clause as shown:\n\nSHOW VARIABLES LIKE \'max_join_size\';\nSHOW SESSION VARIABLES LIKE \'max_join_size\';\n\nTo get a list of variables whose name match a pattern, use the "%"\nwildcard character in a LIKE clause:\n\nSHOW VARIABLES LIKE \'%size%\';\nSHOW GLOBAL VARIABLES LIKE \'%size%\';\n\nWildcard characters can be used in any position within the pattern to\nbe matched. Strictly speaking, because "_" is a wildcard that matches\nany single character, you should escape it as "\\_" to match it\nliterally. In practice, this is rarely necessary.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-variables.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/show-variables.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (347,25,'BINLOG','Syntax:\nBINLOG \'str\'\n\nBINLOG is an internal-use statement. It is generated by the mysqlbinlog\nprogram as the printable representation of certain events in binary log\nfiles. (See http://dev.mysql.com/doc/refman/5.1/en/mysqlbinlog.html.)\nThe \'str\' value is a base 64-encoded string the that server decodes to\ndetermine the data change indicated by the corresponding event. This\nstatement requires the SUPER privilege. It was added in MySQL 5.1.5.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/binlog.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/binlog.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (348,16,'BIT_AND','Syntax:\nBIT_AND(expr)\n\nReturns the bitwise AND of all bits in expr. The calculation is\nperformed with 64-bit (BIGINT) precision.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/group-by-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/group-by-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (349,30,'SECOND','Syntax:\nSECOND(time)\n\nReturns the second for time, in the range 0 to 59.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT SECOND(\'10:05:03\');\n -> 3\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (350,4,'ATAN2','Syntax:\nATAN(Y,X), ATAN2(Y,X)\n\nReturns the arc tangent of the two variables X and Y. It is similar to\ncalculating the arc tangent of Y / X, except that the signs of both\narguments are used to determine the quadrant of the result.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html\n\n','mysql> SELECT ATAN(-2,2);\n -> -0.78539816339745\nmysql> SELECT ATAN2(PI(),0);\n -> 1.5707963267949\n','http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (351,6,'MBRCONTAINS','MBRContains(g1,g2)\n\nReturns 1 or 0 to indicate whether the Minimum Bounding Rectangle of g1\ncontains the Minimum Bounding Rectangle of g2. This tests the opposite\nrelationship as MBRWithin().\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/relations-on-geometry-mbr.html\n\n','mysql> SET @g1 = GeomFromText(\'Polygon((0 0,0 3,3 3,3 0,0 0))\');\nmysql> SET @g2 = GeomFromText(\'Point(1 1)\');\nmysql> SELECT MBRContains(@g1,@g2), MBRContains(@g2,@g1);\n----------------------+----------------------+\n| MBRContains(@g1,@g2) | MBRContains(@g2,@g1) |\n+----------------------+----------------------+\n| 1 | 0 |\n+----------------------+----------------------+\n','http://dev.mysql.com/doc/refman/5.1/en/relations-on-geometry-mbr.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (352,30,'HOUR','Syntax:\nHOUR(time)\n\nReturns the hour for time. The range of the return value is 0 to 23 for\ntime-of-day values. However, the range of TIME values actually is much\nlarger, so HOUR can return values greater than 23.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT HOUR(\'10:05:03\');\n -> 10\nmysql> SELECT HOUR(\'272:59:59\');\n -> 272\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (353,26,'SELECT','Syntax:\nSELECT\n [ALL | DISTINCT | DISTINCTROW ]\n [HIGH_PRIORITY]\n [STRAIGHT_JOIN]\n [SQL_SMALL_RESULT] [SQL_BIG_RESULT] [SQL_BUFFER_RESULT]\n [SQL_CACHE | SQL_NO_CACHE] [SQL_CALC_FOUND_ROWS]\n select_expr [, select_expr ...]\n [FROM table_references\n [WHERE where_condition]\n [GROUP BY {col_name | expr | position}\n [ASC | DESC], ... [WITH ROLLUP]]\n [HAVING where_condition]\n [ORDER BY {col_name | expr | position}\n [ASC | DESC], ...]\n [LIMIT {[offset,] row_count | row_count OFFSET offset}]\n [PROCEDURE procedure_name(argument_list)]\n [INTO OUTFILE \'file_name\'\n [CHARACTER SET charset_name]\n export_options\n | INTO DUMPFILE \'file_name\'\n | INTO var_name [, var_name]]\n [FOR UPDATE | LOCK IN SHARE MODE]]\n\nSELECT is used to retrieve rows selected from one or more tables, and\ncan include UNION statements and subqueries. See [HELP UNION], and\nhttp://dev.mysql.com/doc/refman/5.1/en/subqueries.html.\n\nThe most commonly used clauses of SELECT statements are these:\n\no Each select_expr indicates a column that you want to retrieve. There\n must be at least one select_expr.\n\no table_references indicates the table or tables from which to retrieve\n rows. Its syntax is described in [HELP JOIN].\n\no The WHERE clause, if given, indicates the condition or conditions\n that rows must satisfy to be selected. where_condition is an\n expression that evaluates to true for each row to be selected. The\n statement selects all rows if there is no WHERE clause.\n\n In the WHERE clause, you can use any of the functions and operators\n that MySQL supports, except for aggregate (summary) functions. See\n http://dev.mysql.com/doc/refman/5.1/en/functions.html.\n\nSELECT can also be used to retrieve rows computed without reference to\nany table.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/select.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/select.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (354,4,'COT','Syntax:\nCOT(X)\n\nReturns the cotangent of X.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html\n\n','mysql> SELECT COT(12);\n -> -1.5726734063977\nmysql> SELECT COT(0);\n -> NULL\n','http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (355,25,'SHOW CREATE EVENT','Syntax:\nSHOW CREATE EVENT event_name\n\nThis statement displays the CREATE EVENT statement needed to re-create\na given event. For example (using the same event e_daily defined and\nthen altered in [HELP SHOW EVENTS]):\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-create-event.html\n\n','mysql> SHOW CREATE EVENT test.e_daily\\G\n*************************** 1. row ***************************\n Event: e_daily\n sql_mode:\n time_zone: SYSTEM\n Create Event: CREATE EVENT `e_daily`\n ON SCHEDULE EVERY 1 DAY\n STARTS CURRENT_TIMESTAMP + INTERVAL 6 HOUR\n ON COMPLETION NOT PRESERVE\n ENABLE\n COMMENT \'Saves total number of sessions then\n clears the table each day\'\n DO BEGIN\n INSERT INTO site_activity.totals (time, total)\n SELECT CURRENT_TIMESTAMP, COUNT(*)\n FROM site_activity.sessions;\n DELETE FROM site_activity.sessions;\n END\ncharacter_set_client: latin1\ncollation_connection: latin1_swedish_ci\n Database Collation: latin1_swedish_ci\n','http://dev.mysql.com/doc/refman/5.1/en/show-create-event.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (356,19,'BACKUP TABLE','Syntax:\nBACKUP TABLE tbl_name [, tbl_name] ... TO \'/path/to/backup/directory\'\n\n*Note*: This statement is deprecated and is removed in MySQL 5.5. As an\nalternative, mysqldump or mysqlhotcopy can be used instead.\n\nBACKUP TABLE copies to the backup directory the minimum number of table\nfiles needed to restore the table, after flushing any buffered changes\nto disk. The statement works only for MyISAM tables. It copies the .frm\ndefinition and .MYD data files. The .MYI index file can be rebuilt from\nthose two files. The directory should be specified as a full path name.\nTo restore the table, use RESTORE TABLE.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/backup-table.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/backup-table.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (357,35,'LOAD_FILE','Syntax:\nLOAD_FILE(file_name)\n\nReads the file and returns the file contents as a string. To use this\nfunction, the file must be located on the server host, you must specify\nthe full path name to the file, and you must have the FILE privilege.\nThe file must be readable by all and its size less than\nmax_allowed_packet bytes. If the secure_file_priv system variable is\nset to a nonempty directory name, the file to be loaded must be located\nin that directory.\n\nIf the file does not exist or cannot be read because one of the\npreceding conditions is not satisfied, the function returns NULL.\n\nAs of MySQL 5.1.6, the character_set_filesystem system variable\ncontrols interpretation of file names that are given as literal\nstrings.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','mysql> UPDATE t\n SET blob_col=LOAD_FILE(\'/tmp/picture\')\n WHERE id=1;\n','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (358,25,'LOAD TABLE FROM MASTER','Syntax:\nLOAD TABLE tbl_name FROM MASTER\n\nThis feature is deprecated and should be avoided. It is subject to\nremoval in a future version of MySQL.\n\nSince the current implementation of LOAD DATA FROM MASTER and LOAD\nTABLE FROM MASTER is very limited, these statements are deprecated as\nof MySQL 4.1 and removed in MySQL 5.5.\n\nThe recommended alternative solution to using LOAD DATA FROM MASTER or\nLOAD TABLE FROM MASTER is using mysqldump or mysqlhotcopy. The latter\nrequires Perl and two Perl modules (DBI and DBD:mysql) and works for\nMyISAM and ARCHIVE tables only. With mysqldump, you can create SQL\ndumps on the master and pipe (or copy) these to a mysql client on the\nslave. This has the advantage of working for all storage engines, but\ncan be quite slow, since it works using SELECT.\n\nTransfers a copy of the table from the master to the slave. This\nstatement is implemented mainly debugging LOAD DATA FROM MASTER\noperations. To use LOAD TABLE, the account used for connecting to the\nmaster server must have the RELOAD and SUPER privileges on the master\nand the SELECT privilege for the master table to load. On the slave\nside, the user that issues LOAD TABLE FROM MASTER must have privileges\nfor dropping and creating the table.\n\nThe conditions for LOAD DATA FROM MASTER apply here as well. For\nexample, LOAD TABLE FROM MASTER works only for MyISAM tables. The\ntimeout notes for LOAD DATA FROM MASTER apply as well.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/load-table-from-master.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/load-table-from-master.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (359,3,'POINTFROMTEXT','PointFromText(wkt[,srid])\n\nConstructs a POINT value using its WKT representation and SRID.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-wkt-functions\n\n','','http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-wkt-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (360,16,'GROUP_CONCAT','Syntax:\nGROUP_CONCAT(expr)\n\nThis function returns a string result with the concatenated non-NULL\nvalues from a group. It returns NULL if there are no non-NULL values.\nThe full syntax is as follows:\n\nGROUP_CONCAT([DISTINCT] expr [,expr ...]\n [ORDER BY {unsigned_integer | col_name | expr}\n [ASC | DESC] [,col_name ...]]\n [SEPARATOR str_val])\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/group-by-functions.html\n\n','mysql> SELECT student_name,\n -> GROUP_CONCAT(test_score)\n -> FROM student\n -> GROUP BY student_name;\n','http://dev.mysql.com/doc/refman/5.1/en/group-by-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (361,30,'DATE_FORMAT','Syntax:\nDATE_FORMAT(date,format)\n\nFormats the date value according to the format string.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT DATE_FORMAT(\'2009-10-04 22:23:00\', \'%W %M %Y\');\n -> \'Sunday October 2009\'\nmysql> SELECT DATE_FORMAT(\'2007-10-04 22:23:00\', \'%H:%i:%s\');\n -> \'22:23:00\'\nmysql> SELECT DATE_FORMAT(\'1900-10-04 22:23:00\',\n -> \'%D %y %a %d %m %b %j\');\n -> \'4th 00 Thu 04 10 Oct 277\'\nmysql> SELECT DATE_FORMAT(\'1997-10-04 22:23:00\',\n -> \'%H %k %I %r %T %S %w\');\n -> \'22 22 10 10:23:00 PM 22:23:00 00 6\'\nmysql> SELECT DATE_FORMAT(\'1999-01-01\', \'%X %V\');\n -> \'1998 52\'\nmysql> SELECT DATE_FORMAT(\'2006-06-00\', \'%d\');\n -> \'00\'\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (362,15,'BENCHMARK','Syntax:\nBENCHMARK(count,expr)\n\nThe BENCHMARK() function executes the expression expr repeatedly count\ntimes. It may be used to time how quickly MySQL processes the\nexpression. The result value is always 0. The intended use is from\nwithin the mysql client, which reports query execution times:\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/information-functions.html\n\n','mysql> SELECT BENCHMARK(1000000,ENCODE(\'hello\',\'goodbye\'));\n+----------------------------------------------+\n| BENCHMARK(1000000,ENCODE(\'hello\',\'goodbye\')) |\n+----------------------------------------------+\n| 0 |\n+----------------------------------------------+\n1 row in set (4.74 sec)\n','http://dev.mysql.com/doc/refman/5.1/en/information-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (363,30,'YEAR','Syntax:\nYEAR(date)\n\nReturns the year for date, in the range 1000 to 9999, or 0 for the\n"zero" date.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT YEAR(\'1987-01-01\');\n -> 1987\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (364,25,'SHOW ENGINE','Syntax:\nSHOW ENGINE engine_name {STATUS | MUTEX}\n\nSHOW ENGINE displays operational information about a storage engine.\nThe following statements currently are supported:\n\nSHOW ENGINE INNODB STATUS\nSHOW ENGINE INNODB MUTEX\nSHOW ENGINE {NDB | NDBCLUSTER} STATUS\n\nOlder (and now deprecated) synonyms are SHOW INNODB STATUS for SHOW\nENGINE INNODB STATUS and SHOW MUTEX STATUS for SHOW ENGINE INNODB\nMUTEX. SHOW INNODB STATUS and SHOW MUTEX STATUS are removed in MySQL\n5.5.\n\nIn MySQL 5.0, SHOW ENGINE INNODB MUTEX is invoked as SHOW MUTEX STATUS.\nThe latter statement displays similar information but in a somewhat\ndifferent output format.\n\nSHOW ENGINE BDB LOGS formerly displayed status information about BDB\nlog files. As of MySQL 5.1.12, the BDB storage engine is not supported,\nand this statement produces a warning.\n\nSHOW ENGINE INNODB STATUS displays extensive information from the\nstandard InnoDB Monitor about the state of the InnoDB storage engine.\nFor information about the standard monitor and other InnoDB Monitors\nthat provide information about InnoDB processing, see\nhttp://dev.mysql.com/doc/refman/5.1/en/innodb-monitors.html.\n\nSHOW ENGINE INNODB MUTEX displays InnoDB mutex statistics. From MySQL\n5.1.2 to 5.1.14, the statement displays the following output fields:\n\no Type\n\n Always InnoDB.\n\no Name\n\n The mutex name and the source file where it is implemented. Example:\n &pool->mutex:mem0pool.c\n\n The mutex name indicates its purpose. For example, the log_sys mutex\n is used by the InnoDB logging subsystem and indicates how intensive\n logging activity is. The buf_pool mutex protects the InnoDB buffer\n pool.\n\no Status\n\n The mutex status. The fields contains several values:\n\n o count indicates how many times the mutex was requested.\n\n o spin_waits indicates how many times the spinlock had to run.\n\n o spin_rounds indicates the number of spinlock rounds. (spin_rounds\n divided by spin_waits provides the average round count.)\n\n o os_waits indicates the number of operating system waits. This\n occurs when the spinlock did not work (the mutex was not locked\n during the spinlock and it was necessary to yield to the operating\n system and wait).\n\n o os_yields indicates the number of times a the thread trying to lock\n a mutex gave up its timeslice and yielded to the operating system\n (on the presumption that allowing other threads to run will free\n the mutex so that it can be locked).\n\n o os_wait_times indicates the amount of time (in ms) spent in\n operating system waits, if the timed_mutexes system variable is 1\n (ON). If timed_mutexes is 0 (OFF), timing is disabled, so\n os_wait_times is 0. timed_mutexes is off by default.\n\nFrom MySQL 5.1.15 on, the statement displays the following output\nfields:\n\no Type\n\n Always InnoDB.\n\no Name\n\n The source file where the mutex is implemented, and the line number\n in the file where the mutex is created. The line number may change\n depending on your version of MySQL.\n\no Status\n\n This field displays the same values as previously described (count,\n spin_waits, spin_rounds, os_waits, os_yields, os_wait_times), but\n only if UNIV_DEBUG was defined at MySQL compilation time (for\n example, in include/univ.h in the InnoDB part of the MySQL source\n tree). If UNIV_DEBUG was not defined, the statement displays only the\n os_waits value. In the latter case (without UNIV_DEBUG), the\n information on which the output is based is insufficient to\n distinguish regular mutexes and mutexes that protect rw-locks (which\n allow multiple readers or a single writer). Consequently, the output\n may appear to contain multiple rows for the same mutex.\n\nInformation from this statement can be used to diagnose system\nproblems. For example, large values of spin_waits and spin_rounds may\nindicate scalability problems.\n\nIf the server has the NDBCLUSTER storage engine enabled, SHOW ENGINE\nNDB STATUS displays cluster status information such as the number of\nconnected data nodes, the cluster connectstring, and cluster binlog\nepochs, as well as counts of various Cluster API objects created by the\nMySQL Server when connected to the cluster. Sample output from this\nstatement is shown here:\n\nmysql> SHOW ENGINE NDB STATUS;\n+------------+-----------------------+--------------------------------------------------+\n| Type | Name | Status |\n+------------+-----------------------+--------------------------------------------------+\n| ndbcluster | connection | cluster_node_id=7,\n connected_host=192.168.0.103, connected_port=1186, number_of_data_nodes=4,\n number_of_ready_data_nodes=3, connect_count=0 |\n| ndbcluster | NdbTransaction | created=6, free=0, sizeof=212 |\n| ndbcluster | NdbOperation | created=8, free=8, sizeof=660 |\n| ndbcluster | NdbIndexScanOperation | created=1, free=1, sizeof=744 |\n| ndbcluster | NdbIndexOperation | created=0, free=0, sizeof=664 |\n| ndbcluster | NdbRecAttr | created=1285, free=1285, sizeof=60 |\n| ndbcluster | NdbApiSignal | created=16, free=16, sizeof=136 |\n| ndbcluster | NdbLabel | created=0, free=0, sizeof=196 |\n| ndbcluster | NdbBranch | created=0, free=0, sizeof=24 |\n| ndbcluster | NdbSubroutine | created=0, free=0, sizeof=68 |\n| ndbcluster | NdbCall | created=0, free=0, sizeof=16 |\n| ndbcluster | NdbBlob | created=1, free=1, sizeof=264 |\n| ndbcluster | NdbReceiver | created=4, free=0, sizeof=68 |\n| ndbcluster | binlog | latest_epoch=155467, latest_trans_epoch=148126,\n latest_received_binlog_epoch=0, latest_handled_binlog_epoch=0,\n latest_applied_binlog_epoch=0 |\n+------------+-----------------------+--------------------------------------------------+\n\nThe rows with connection and binlog in the Name column were added to\nthe output of this statement in MySQL 5.1. The Status column in each of\nthese rows provides information about the MySQL server\'s connection to\nthe cluster and about the cluster binary log\'s status, respectively.\nThe Status information is in the form of comma-delimited set of\nname/value pairs.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-engine.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/show-engine.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (365,14,'NAME_CONST','Syntax:\nNAME_CONST(name,value)\n\nReturns the given value. When used to produce a result set column,\nNAME_CONST() causes the column to have the given name. The arguments\nshould be constants.\n\nmysql> SELECT NAME_CONST(\'myname\', 14);\n+--------+\n| myname |\n+--------+\n| 14 |\n+--------+\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/miscellaneous-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/miscellaneous-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (366,14,'RELEASE_LOCK','Syntax:\nRELEASE_LOCK(str)\n\nReleases the lock named by the string str that was obtained with\nGET_LOCK(). Returns 1 if the lock was released, 0 if the lock was not\nestablished by this thread (in which case the lock is not released),\nand NULL if the named lock did not exist. The lock does not exist if it\nwas never obtained by a call to GET_LOCK() or if it has previously been\nreleased.\n\nThe DO statement is convenient to use with RELEASE_LOCK(). See [HELP\nDO].\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/miscellaneous-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/miscellaneous-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (367,17,'IS NULL','Syntax:\nIS NULL\n\nTests whether a value is NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html\n\n','mysql> SELECT 1 IS NULL, 0 IS NULL, NULL IS NULL;\n -> 0, 0, 1\n','http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (368,30,'CONVERT_TZ','Syntax:\nCONVERT_TZ(dt,from_tz,to_tz)\n\nCONVERT_TZ() converts a datetime value dt from the time zone given by\nfrom_tz to the time zone given by to_tz and returns the resulting\nvalue. Time zones are specified as described in\nhttp://dev.mysql.com/doc/refman/5.1/en/time-zone-support.html. This\nfunction returns NULL if the arguments are invalid.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT CONVERT_TZ(\'2004-01-01 12:00:00\',\'GMT\',\'MET\');\n -> \'2004-01-01 13:00:00\'\nmysql> SELECT CONVERT_TZ(\'2004-01-01 12:00:00\',\'+00:00\',\'+10:00\');\n -> \'2004-01-01 22:00:00\'\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (369,30,'TIME_TO_SEC','Syntax:\nTIME_TO_SEC(time)\n\nReturns the time argument, converted to seconds.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT TIME_TO_SEC(\'22:23:00\');\n -> 80580\nmysql> SELECT TIME_TO_SEC(\'00:39:38\');\n -> 2378\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (370,30,'WEEKDAY','Syntax:\nWEEKDAY(date)\n\nReturns the weekday index for date (0 = Monday, 1 = Tuesday, ... 6 =\nSunday).\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT WEEKDAY(\'2008-02-03 22:23:00\');\n -> 6\nmysql> SELECT WEEKDAY(\'2007-11-06\');\n -> 1\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (371,35,'EXPORT_SET','Syntax:\nEXPORT_SET(bits,on,off[,separator[,number_of_bits]])\n\nReturns a string such that for every bit set in the value bits, you get\nan on string and for every bit not set in the value, you get an off\nstring. Bits in bits are examined from right to left (from low-order to\nhigh-order bits). Strings are added to the result from left to right,\nseparated by the separator string (the default being the comma\ncharacter ","). The number of bits examined is given by number_of_bits\n(defaults to 64).\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','mysql> SELECT EXPORT_SET(5,\'Y\',\'N\',\',\',4);\n -> \'Y,N,Y,N\'\nmysql> SELECT EXPORT_SET(6,\'1\',\'0\',\',\',10);\n -> \'0,1,1,0,0,0,0,0,0,0\'\n','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (372,37,'ALTER SERVER','Syntax:\nALTER SERVER server_name\n OPTIONS (option [, option] ...)\n\nAlters the server information for server_name, adjusting the specified\noptions as per the CREATE SERVER command. See [HELP CREATE SERVER]. The\ncorresponding fields in the mysql.servers table are updated\naccordingly. This statement requires the SUPER privilege.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/alter-server.html\n\n','ALTER SERVER s OPTIONS (USER \'sally\');\n','http://dev.mysql.com/doc/refman/5.1/en/alter-server.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (373,30,'TIME FUNCTION','Syntax:\nTIME(expr)\n\nExtracts the time part of the time or datetime expression expr and\nreturns it as a string.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT TIME(\'2003-12-31 01:02:03\');\n -> \'01:02:03\'\nmysql> SELECT TIME(\'2003-12-31 01:02:03.000123\');\n -> \'01:02:03.000123\'\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (374,30,'DATE_ADD','Syntax:\nDATE_ADD(date,INTERVAL expr unit), DATE_SUB(date,INTERVAL expr unit)\n\nThese functions perform date arithmetic. The date argument specifies\nthe starting date or datetime value. expr is an expression specifying\nthe interval value to be added or subtracted from the starting date.\nexpr is a string; it may start with a "-" for negative intervals. unit\nis a keyword indicating the units in which the expression should be\ninterpreted.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT \'2008-12-31 23:59:59\' + INTERVAL 1 SECOND;\n -> \'2009-01-01 00:00:00\'\nmysql> SELECT INTERVAL 1 DAY + \'2008-12-31\';\n -> \'2009-01-01\'\nmysql> SELECT \'2005-01-01\' - INTERVAL 1 SECOND;\n -> \'2004-12-31 23:59:59\'\nmysql> SELECT DATE_ADD(\'2000-12-31 23:59:59\',\n -> INTERVAL 1 SECOND);\n -> \'2001-01-01 00:00:00\'\nmysql> SELECT DATE_ADD(\'2010-12-31 23:59:59\',\n -> INTERVAL 1 DAY);\n -> \'2011-01-01 23:59:59\'\nmysql> SELECT DATE_ADD(\'2100-12-31 23:59:59\',\n -> INTERVAL \'1:1\' MINUTE_SECOND);\n -> \'2101-01-01 00:01:00\'\nmysql> SELECT DATE_SUB(\'2005-01-01 00:00:00\',\n -> INTERVAL \'1 1:1:1\' DAY_SECOND);\n -> \'2004-12-30 22:58:59\'\nmysql> SELECT DATE_ADD(\'1900-01-01 00:00:00\',\n -> INTERVAL \'-1 10\' DAY_HOUR);\n -> \'1899-12-30 14:00:00\'\nmysql> SELECT DATE_SUB(\'1998-01-02\', INTERVAL 31 DAY);\n -> \'1997-12-02\'\nmysql> SELECT DATE_ADD(\'1992-12-31 23:59:59.000002\',\n -> INTERVAL \'1.999999\' SECOND_MICROSECOND);\n -> \'1993-01-01 00:00:01.000001\'\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (375,35,'CAST','Syntax:\nCAST(expr AS type)\n\nThe CAST() function takes a value of one type and produce a value of\nanother type, similar to CONVERT(). See the description of CONVERT()\nfor more information.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/cast-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/cast-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (376,35,'SOUNDS LIKE','Syntax:\nexpr1 SOUNDS LIKE expr2\n\nThis is the same as SOUNDEX(expr1) = SOUNDEX(expr2).\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (377,30,'PERIOD_DIFF','Syntax:\nPERIOD_DIFF(P1,P2)\n\nReturns the number of months between periods P1 and P2. P1 and P2\nshould be in the format YYMM or YYYYMM. Note that the period arguments\nP1 and P2 are not date values.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT PERIOD_DIFF(200802,200703);\n -> 11\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (378,35,'LIKE','Syntax:\nexpr LIKE pat [ESCAPE \'escape_char\']\n\nPattern matching using SQL simple regular expression comparison.\nReturns 1 (TRUE) or 0 (FALSE). If either expr or pat is NULL, the\nresult is NULL.\n\nThe pattern need not be a literal string. For example, it can be\nspecified as a string expression or table column.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-comparison-functions.html\n\n','mysql> SELECT \'David!\' LIKE \'David_\';\n -> 1\nmysql> SELECT \'David!\' LIKE \'%D%v%\';\n -> 1\n','http://dev.mysql.com/doc/refman/5.1/en/string-comparison-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (379,23,'MULTIPOINT','MultiPoint(pt1,pt2,...)\n\nConstructs a MultiPoint value using Point or WKB Point arguments.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-mysql-specific-functions\n\n','','http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-mysql-specific-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (380,18,'>>','Syntax:\n>>\n\nShifts a longlong (BIGINT) number to the right.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/bit-functions.html\n\n','mysql> SELECT 4 >> 2;\n -> 1\n','http://dev.mysql.com/doc/refman/5.1/en/bit-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (381,22,'FETCH','Syntax:\nFETCH cursor_name INTO var_name [, var_name] ...\n\nThis statement fetches the next row (if a row exists) using the\nspecified open cursor, and advances the cursor pointer.\n\nIf no more rows are available, a No Data condition occurs with SQLSTATE\nvalue 02000. To detect this condition, you can set up a handler for it\n(or for a NOT FOUND condition). An example is shown in\nhttp://dev.mysql.com/doc/refman/5.1/en/cursors.html.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/fetch.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/fetch.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (382,16,'AVG','Syntax:\nAVG([DISTINCT] expr)\n\nReturns the average value of expr. The DISTINCT option can be used to\nreturn the average of the distinct values of expr.\n\nAVG() returns NULL if there were no matching rows.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/group-by-functions.html\n\n','mysql> SELECT student_name, AVG(test_score)\n -> FROM student\n -> GROUP BY student_name;\n','http://dev.mysql.com/doc/refman/5.1/en/group-by-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (383,28,'TRUE FALSE','The constants TRUE and FALSE evaluate to 1 and 0, respectively. The\nconstant names can be written in any lettercase.\n\nmysql> SELECT TRUE, true, FALSE, false;\n -> 1, 1, 0, 0\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/boolean-values.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/boolean-values.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (384,6,'MBRWITHIN','MBRWithin(g1,g2)\n\nReturns 1 or 0 to indicate whether the Minimum Bounding Rectangle of g1\nis within the Minimum Bounding Rectangle of g2. This tests the opposite\nrelationship as MBRContains().\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/relations-on-geometry-mbr.html\n\n','mysql> SET @g1 = GeomFromText(\'Polygon((0 0,0 3,3 3,3 0,0 0))\');\nmysql> SET @g2 = GeomFromText(\'Polygon((0 0,0 5,5 5,5 0,0 0))\');\nmysql> SELECT MBRWithin(@g1,@g2), MBRWithin(@g2,@g1);\n+--------------------+--------------------+\n| MBRWithin(@g1,@g2) | MBRWithin(@g2,@g1) |\n+--------------------+--------------------+\n| 1 | 0 |\n+--------------------+--------------------+\n','http://dev.mysql.com/doc/refman/5.1/en/relations-on-geometry-mbr.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (385,17,'IN','Syntax:\nexpr IN (value,...)\n\nReturns 1 if expr is equal to any of the values in the IN list, else\nreturns 0. If all values are constants, they are evaluated according to\nthe type of expr and sorted. The search for the item then is done using\na binary search. This means IN is very quick if the IN value list\nconsists entirely of constants. Otherwise, type conversion takes place\naccording to the rules described in\nhttp://dev.mysql.com/doc/refman/5.1/en/type-conversion.html, but\napplied to all the arguments.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html\n\n','mysql> SELECT 2 IN (0,3,5,7);\n -> 0\nmysql> SELECT \'wefwf\' IN (\'wee\',\'wefwf\',\'weg\');\n -> 1\n','http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (386,35,'QUOTE','Syntax:\nQUOTE(str)\n\nQuotes a string to produce a result that can be used as a properly\nescaped data value in an SQL statement. The string is returned enclosed\nby single quotes and with each instance of single quote ("\'"),\nbackslash ("\\"), ASCII NUL, and Control-Z preceded by a backslash. If\nthe argument is NULL, the return value is the word "NULL" without\nenclosing single quotes.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','mysql> SELECT QUOTE(\'Don\\\'t!\');\n -> \'Don\\\'t!\'\nmysql> SELECT QUOTE(NULL);\n -> NULL\n','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (387,15,'SESSION_USER','Syntax:\nSESSION_USER()\n\nSESSION_USER() is a synonym for USER().\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/information-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/information-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (388,25,'HELP COMMAND','Syntax:\nmysql> help search_string\n\nIf you provide an argument to the help command, mysql uses it as a\nsearch string to access server-side help from the contents of the MySQL\nReference Manual. The proper operation of this command requires that\nthe help tables in the mysql database be initialized with help topic\ninformation (see\nhttp://dev.mysql.com/doc/refman/5.1/en/server-side-help-support.html).\n\nIf there is no match for the search string, the search fails:\n\nmysql> help me\n\nNothing found\nPlease try to run \'help contents\' for a list of all accessible topics\n\nUse help contents to see a list of the help categories:\n\nmysql> help contents\nYou asked for help about help category: "Contents"\nFor more information, type \'help \', where is one of the\nfollowing categories:\n Account Management\n Administration\n Data Definition\n Data Manipulation\n Data Types\n Functions\n Functions and Modifiers for Use with GROUP BY\n Geographic Features\n Language Structure\n Plugins\n Storage Engines\n Stored Routines\n Table Maintenance\n Transactions\n Triggers\n\nIf the search string matches multiple items, mysql shows a list of\nmatching topics:\n\nmysql> help logs\nMany help items for your request exist.\nTo make a more specific request, please type \'help \',\nwhere is one of the following topics:\n SHOW\n SHOW BINARY LOGS\n SHOW ENGINE\n SHOW LOGS\n\nUse a topic as the search string to see the help entry for that topic:\n\nmysql> help show binary logs\nName: \'SHOW BINARY LOGS\'\nDescription:\nSyntax:\nSHOW BINARY LOGS\nSHOW MASTER LOGS\n\nLists the binary log files on the server. This statement is used as\npart of the procedure described in [purge-binary-logs], that shows how\nto determine which logs can be purged.\n\nmysql> SHOW BINARY LOGS;\n+---------------+-----------+\n| Log_name | File_size |\n+---------------+-----------+\n| binlog.000015 | 724935 |\n| binlog.000016 | 733481 |\n+---------------+-----------+\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/mysql-server-side-help.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/mysql-server-side-help.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (389,30,'QUARTER','Syntax:\nQUARTER(date)\n\nReturns the quarter of the year for date, in the range 1 to 4.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT QUARTER(\'2008-04-01\');\n -> 2\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (390,35,'POSITION','Syntax:\nPOSITION(substr IN str)\n\nPOSITION(substr IN str) is a synonym for LOCATE(substr,str).\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (391,25,'SHOW CREATE FUNCTION','Syntax:\nSHOW CREATE FUNCTION func_name\n\nThis statement is similar to SHOW CREATE PROCEDURE but for stored\nfunctions. See [HELP SHOW CREATE PROCEDURE].\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-create-function.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/show-create-function.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (392,14,'IS_USED_LOCK','Syntax:\nIS_USED_LOCK(str)\n\nChecks whether the lock named str is in use (that is, locked). If so,\nit returns the connection identifier of the client that holds the lock.\nOtherwise, it returns NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/miscellaneous-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/miscellaneous-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (393,3,'POLYFROMTEXT','PolyFromText(wkt[,srid]), PolygonFromText(wkt[,srid])\n\nConstructs a POLYGON value using its WKT representation and SRID.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-wkt-functions\n\n','','http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-wkt-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (394,11,'DES_ENCRYPT','Syntax:\nDES_ENCRYPT(str[,{key_num|key_str}])\n\nEncrypts the string with the given key using the Triple-DES algorithm.\n\nThis function works only if MySQL has been configured with SSL support.\nSee http://dev.mysql.com/doc/refman/5.1/en/secure-connections.html.\n\nThe encryption key to use is chosen based on the second argument to\nDES_ENCRYPT(), if one was given. With no argument, the first key from\nthe DES key file is used. With a key_num argument, the given key number\n(0-9) from the DES key file is used. With a key_str argument, the given\nkey string is used to encrypt str.\n\nThe key file can be specified with the --des-key-file server option.\n\nThe return string is a binary string where the first character is\nCHAR(128 | key_num). If an error occurs, DES_ENCRYPT() returns NULL.\n\nThe 128 is added to make it easier to recognize an encrypted key. If\nyou use a string key, key_num is 127.\n\nThe string length for the result is given by this formula:\n\nnew_len = orig_len + (8 - (orig_len % 8)) + 1\n\nEach line in the DES key file has the following format:\n\nkey_num des_key_str\n\nEach key_num value must be a number in the range from 0 to 9. Lines in\nthe file may be in any order. des_key_str is the string that is used to\nencrypt the message. There should be at least one space between the\nnumber and the key. The first key is the default key that is used if\nyou do not specify any key argument to DES_ENCRYPT().\n\nYou can tell MySQL to read new key values from the key file with the\nFLUSH DES_KEY_FILE statement. This requires the RELOAD privilege.\n\nOne benefit of having a set of default keys is that it gives\napplications a way to check for the existence of encrypted column\nvalues, without giving the end user the right to decrypt those values.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/encryption-functions.html\n\n','mysql> SELECT customer_address FROM customer_table \n > WHERE crypted_credit_card = DES_ENCRYPT(\'credit_card_number\');\n','http://dev.mysql.com/doc/refman/5.1/en/encryption-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (395,4,'CEIL','Syntax:\nCEIL(X)\n\nCEIL() is a synonym for CEILING().\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (396,35,'LENGTH','Syntax:\nLENGTH(str)\n\nReturns the length of the string str, measured in bytes. A multi-byte\ncharacter counts as multiple bytes. This means that for a string\ncontaining five two-byte characters, LENGTH() returns 10, whereas\nCHAR_LENGTH() returns 5.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','mysql> SELECT LENGTH(\'text\');\n -> 4\n','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (397,30,'STR_TO_DATE','Syntax:\nSTR_TO_DATE(str,format)\n\nThis is the inverse of the DATE_FORMAT() function. It takes a string\nstr and a format string format. STR_TO_DATE() returns a DATETIME value\nif the format string contains both date and time parts, or a DATE or\nTIME value if the string contains only date or time parts. If the date,\ntime, or datetime value extracted from str is illegal, STR_TO_DATE()\nreturns NULL and produces a warning.\n\nThe server scans str attempting to match format to it. The format\nstring can contain literal characters and format specifiers beginning\nwith %. Literal characters in format must match literally in str.\nFormat specifiers in format must match a date or time part in str. For\nthe specifiers that can be used in format, see the DATE_FORMAT()\nfunction description.\n\nmysql> SELECT STR_TO_DATE(\'01,5,2013\',\'%d,%m,%Y\');\n -> \'2013-05-01\'\nmysql> SELECT STR_TO_DATE(\'May 1, 2013\',\'%M %d,%Y\');\n -> \'2013-05-01\'\n\nScanning starts at the beginning of str and fails if format is found\nnot to match. Extra characters at the end of str are ignored.\n\nmysql> SELECT STR_TO_DATE(\'a09:30:17\',\'a%h:%i:%s\');\n -> \'09:30:17\'\nmysql> SELECT STR_TO_DATE(\'a09:30:17\',\'%h:%i:%s\');\n -> NULL\nmysql> SELECT STR_TO_DATE(\'09:30:17a\',\'%h:%i:%s\');\n -> \'09:30:17\'\n\nUnspecified date or time parts have a value of 0, so incompletely\nspecified values in str produce a result with some or all parts set to\n0:\n\nmysql> SELECT STR_TO_DATE(\'abc\',\'abc\');\n -> \'0000-00-00\'\nmysql> SELECT STR_TO_DATE(\'9\',\'%m\');\n -> \'0000-09-00\'\nmysql> SELECT STR_TO_DATE(\'9\',\'%s\');\n -> \'00:00:09\'\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (398,10,'Y','Y(p)\n\nReturns the Y-coordinate value for the point p as a double-precision\nnumber.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#point-property-functions\n\n','mysql> SET @pt = \'Point(56.7 53.34)\';\nmysql> SELECT Y(GeomFromText(@pt));\n+----------------------+\n| Y(GeomFromText(@pt)) |\n+----------------------+\n| 53.34 |\n+----------------------+\n','http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#point-property-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (399,25,'SHOW INNODB STATUS','Syntax:\nSHOW INNODB STATUS\n\nIn MySQL 5.1, this is a deprecated synonym for SHOW ENGINE INNODB\nSTATUS. See [HELP SHOW ENGINE]. SHOW INNODB STATUS is removed in MySQL\n5.5.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-innodb-status.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/show-innodb-status.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (400,19,'CHECKSUM TABLE','Syntax:\nCHECKSUM TABLE tbl_name [, tbl_name] ... [ QUICK | EXTENDED ]\n\nCHECKSUM TABLE reports a table checksum.\n\nWith QUICK, the live table checksum is reported if it is available, or\nNULL otherwise. This is very fast. A live checksum is enabled by\nspecifying the CHECKSUM=1 table option when you create the table;\ncurrently, this is supported only for MyISAM tables. See [HELP CREATE\nTABLE].\n\nWith EXTENDED, the entire table is read row by row and the checksum is\ncalculated. This can be very slow for large tables.\n\nIf neither QUICK nor EXTENDED is specified, MySQL returns a live\nchecksum if the table storage engine supports it and scans the table\notherwise.\n\nFor a nonexistent table, CHECKSUM TABLE returns NULL and generates a\nwarning.\n\nThe checksum value depends on the table row format. If the row format\nchanges, the checksum also changes. For example, the storage format for\nVARCHAR changed between MySQL 4.1 and 5.0, so if a 4.1 table is\nupgraded to MySQL 5.0, the checksum value may change.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/checksum-table.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/checksum-table.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (401,2,'NUMINTERIORRINGS','NumInteriorRings(poly)\n\nReturns the number of interior rings in the Polygon value poly.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#polygon-property-functions\n\n','mysql> SET @poly =\n -> \'Polygon((0 0,0 3,3 3,3 0,0 0),(1 1,1 2,2 2,2 1,1 1))\';\nmysql> SELECT NumInteriorRings(GeomFromText(@poly));\n+---------------------------------------+\n| NumInteriorRings(GeomFromText(@poly)) |\n+---------------------------------------+\n| 1 |\n+---------------------------------------+\n','http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#polygon-property-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (402,2,'INTERIORRINGN','InteriorRingN(poly,N)\n\nReturns the N-th interior ring for the Polygon value poly as a\nLineString. Rings are numbered beginning with 1.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#polygon-property-functions\n\n','mysql> SET @poly =\n -> \'Polygon((0 0,0 3,3 3,3 0,0 0),(1 1,1 2,2 2,2 1,1 1))\';\nmysql> SELECT AsText(InteriorRingN(GeomFromText(@poly),1));\n+----------------------------------------------+\n| AsText(InteriorRingN(GeomFromText(@poly),1)) |\n+----------------------------------------------+\n| LINESTRING(1 1,1 2,2 2,2 1,1 1) |\n+----------------------------------------------+\n','http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#polygon-property-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (403,30,'UTC_TIME','Syntax:\nUTC_TIME, UTC_TIME()\n\nReturns the current UTC time as a value in \'HH:MM:SS\' or HHMMSS.uuuuuu\nformat, depending on whether the function is used in a string or\nnumeric context.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT UTC_TIME(), UTC_TIME() + 0;\n -> \'18:07:53\', 180753.000000\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (404,37,'DROP FUNCTION','The DROP FUNCTION statement is used to drop stored functions and\nuser-defined functions (UDFs):\n\no For information about dropping stored functions, see [HELP DROP\n PROCEDURE].\n\no For information about dropping user-defined functions, see [HELP DROP\n FUNCTION UDF].\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/drop-function.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/drop-function.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (405,37,'ALTER EVENT','Syntax:\nALTER\n [DEFINER = { user | CURRENT_USER }]\n EVENT event_name\n [ON SCHEDULE schedule]\n [ON COMPLETION [NOT] PRESERVE]\n [RENAME TO new_event_name]\n [ENABLE | DISABLE | DISABLE ON SLAVE]\n [COMMENT \'comment\']\n [DO sql_statement]\n\nThe ALTER EVENT statement is used to change one or more of the\ncharacteristics of an existing event without the need to drop and\nrecreate it. The syntax for each of the DEFINER, ON SCHEDULE, ON\nCOMPLETION, COMMENT, ENABLE / DISABLE, and DO clauses is exactly the\nsame as when used with CREATE EVENT. (See [HELP CREATE EVENT].)\n\nSupport for the DEFINER clause was added in MySQL 5.1.17.\n\nBeginning with MySQL 5.1.12, this statement requires the EVENT\nprivilege. When a user executes a successful ALTER EVENT statement,\nthat user becomes the definer for the affected event.\n\n(In MySQL 5.1.11 and earlier, an event could be altered only by its\ndefiner, or by a user having the SUPER privilege.)\n\nALTER EVENT works only with an existing event:\n\nmysql> ALTER EVENT no_such_event \n > ON SCHEDULE \n > EVERY \'2:3\' DAY_HOUR;\nERROR 1517 (HY000): Unknown event \'no_such_event\'\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/alter-event.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/alter-event.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (406,16,'STDDEV','Syntax:\nSTDDEV(expr)\n\nReturns the population standard deviation of expr. This function is\nprovided for compatibility with Oracle. The standard SQL function\nSTDDEV_POP() can be used instead.\n\nThis function returns NULL if there were no matching rows.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/group-by-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/group-by-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (407,30,'DATE_SUB','Syntax:\nDATE_SUB(date,INTERVAL expr unit)\n\nSee the description for DATE_ADD().\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (408,30,'PERIOD_ADD','Syntax:\nPERIOD_ADD(P,N)\n\nAdds N months to period P (in the format YYMM or YYYYMM). Returns a\nvalue in the format YYYYMM. Note that the period argument P is not a\ndate value.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT PERIOD_ADD(200801,2);\n -> 200803\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (409,18,'|','Syntax:\n|\n\nBitwise OR:\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/bit-functions.html\n\n','mysql> SELECT 29 | 15;\n -> 31\n','http://dev.mysql.com/doc/refman/5.1/en/bit-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (410,3,'GEOMFROMTEXT','GeomFromText(wkt[,srid]), GeometryFromText(wkt[,srid])\n\nConstructs a geometry value of any type using its WKT representation\nand SRID.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-wkt-functions\n\n','','http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-wkt-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (411,14,'UUID_SHORT','Syntax:\nUUID_SHORT()\n\nReturns a "short" universal identifier as a 64-bit unsigned integer\n(rather than a string-form 128-bit identifier as returned by the UUID()\nfunction).\n\nThe value of UUID_SHORT() is guaranteed to be unique if the following\nconditions hold:\n\no The server_id of the current host is unique among your set of master\n and slave servers\n\no server_id is between 0 and 255\n\no You don\'t set back your system time for your server between mysqld\n restarts\n\no You do not invoke UUID_SHORT() on average more than 16 million times\n per second between mysqld restarts\n\nThe UUID_SHORT() return value is constructed this way:\n\n (server_id & 255) << 56\n+ (server_startup_time_in_seconds << 24)\n+ incremented_variable++;\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/miscellaneous-functions.html\n\n','mysql> SELECT UUID_SHORT();\n -> 92395783831158784\n','http://dev.mysql.com/doc/refman/5.1/en/miscellaneous-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (412,35,'RIGHT','Syntax:\nRIGHT(str,len)\n\nReturns the rightmost len characters from the string str, or NULL if\nany argument is NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','mysql> SELECT RIGHT(\'foobarbar\', 4);\n -> \'rbar\'\n','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (413,30,'DATEDIFF','Syntax:\nDATEDIFF(expr1,expr2)\n\nDATEDIFF() returns expr1 - expr2 expressed as a value in days from one\ndate to the other. expr1 and expr2 are date or date-and-time\nexpressions. Only the date parts of the values are used in the\ncalculation.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT DATEDIFF(\'2007-12-31 23:59:59\',\'2007-12-30\');\n -> 1\nmysql> SELECT DATEDIFF(\'2010-11-30 23:59:59\',\'2010-12-31\');\n -> -31\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (414,37,'DROP TABLESPACE','Syntax:\nDROP TABLESPACE tablespace_name\n ENGINE [=] engine_name\n\nThis statement drops a tablespace that was previously created using\nCREATE TABLESPACE (see [HELP CREATE TABLESPACE]).\n\n*Important*: The tablespace to be dropped must not contain any data\nfiles; in other words, before you can drop a tablespace, you must first\ndrop each of its data files using ALTER TABLESPACE ... DROP DATAFILE\n(see [HELP ALTER TABLESPACE]).\n\nThe ENGINE clause (required) specifies the storage engine used by the\ntablespace. In MySQL 5.1, the only accepted values for engine_name are\nNDB and NDBCLUSTER.\n\nDROP TABLESPACE was added in MySQL 5.1.6. In MySQL 5.1, it is useful\nonly with Disk Data storage for MySQL Cluster. See\nhttp://dev.mysql.com/doc/refman/5.1/en/mysql-cluster-disk-data.html.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/drop-tablespace.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/drop-tablespace.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (415,37,'DROP PROCEDURE','Syntax:\nDROP {PROCEDURE | FUNCTION} [IF EXISTS] sp_name\n\nThis statement is used to drop a stored procedure or function. That is,\nthe specified routine is removed from the server. You must have the\nALTER ROUTINE privilege for the routine. (If the\nautomatic_sp_privileges system variable is enabled, that privilege and\nEXECUTE are granted automatically to the routine creator when the\nroutine is created and dropped from the creator when the routine is\ndropped. See\nhttp://dev.mysql.com/doc/refman/5.1/en/stored-routines-privileges.html.\n)\n\nThe IF EXISTS clause is a MySQL extension. It prevents an error from\noccurring if the procedure or function does not exist. A warning is\nproduced that can be viewed with SHOW WARNINGS.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/drop-procedure.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/drop-procedure.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (416,19,'CHECK TABLE','Syntax:\nCHECK TABLE tbl_name [, tbl_name] ... [option] ...\n\noption = {FOR UPGRADE | QUICK | FAST | MEDIUM | EXTENDED | CHANGED}\n\nCHECK TABLE checks a table or tables for errors. CHECK TABLE works for\nMyISAM, InnoDB, and ARCHIVE tables. Starting with MySQL 5.1.9, CHECK\nTABLE is also valid for CSV tables, see\nhttp://dev.mysql.com/doc/refman/5.1/en/csv-storage-engine.html. For\nMyISAM tables, the key statistics are updated as well.\n\nCHECK TABLE can also check views for problems, such as tables that are\nreferenced in the view definition that no longer exist.\n\nBeginning with MySQL 5.1.27, CHECK TABLE is also supported for\npartitioned tables. Also beginning with MySQL 5.1.27, you can use ALTER\nTABLE ... CHECK PARTITION to check one or more partitions; for more\ninformation, see [HELP ALTER TABLE], and\nhttp://dev.mysql.com/doc/refman/5.1/en/partitioning-maintenance.html.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/check-table.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/check-table.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (417,35,'BIN','Syntax:\nBIN(N)\n\nReturns a string representation of the binary value of N, where N is a\nlonglong (BIGINT) number. This is equivalent to CONV(N,10,2). Returns\nNULL if N is NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','mysql> SELECT BIN(12);\n -> \'1100\'\n','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (418,5,'INSTALL PLUGIN','Syntax:\nINSTALL PLUGIN plugin_name SONAME \'shared_library_name\'\n\nThis statement installs a server plugin. It requires the INSERT\nprivilege for the mysql.plugin table.\n\nplugin_name is the name of the plugin as defined in the plugin\ndescriptor structure contained in the library file (see\nhttp://dev.mysql.com/doc/refman/5.1/en/plugin-data-structures.html).\nPlugin names are not case sensitive. For maximal compatibility, plugin\nnames should be limited to ASCII letters, digits, and underscore\nbecause they are used in C source files, shell command lines, M4 and\nBourne shell scripts, and SQL environments.\n\nshared_library_name is the name of the shared library that contains the\nplugin code. The name includes the file name extension (for example,\nlibmyplugin.so, libmyplugin.dll, or libmyplugin.dylib).\n\nThe shared library must be located in the plugin directory (the\ndirectory named by the plugin_dir system variable). The library must be\nin the plugin directory itself, not in a subdirectory. By default,\nplugin_dir is the plugin directory under the directory named by the\npkglibdir configuration variable, but it can be changed by setting the\nvalue of plugin_dir at server startup. For example, set its value in a\nmy.cnf file:\n\n[mysqld]\nplugin_dir=/path/to/plugin/directory\n\nIf the value of plugin_dir is a relative path name, it is taken to be\nrelative to the MySQL base directory (the value of the basedir system\nvariable).\n\nINSTALL PLUGIN loads and initializes the plugin code to make the plugin\navailable for use. A plugin is initialized by executing its\ninitialization function, which handles any setup that the plugin must\nperform before it can be used. When the server shuts down, it executes\nthe deinitialization function for each plugin that is loaded so that\nthe plugin has a change to perform any final cleanup.\n\nINSTALL PLUGIN also registers the plugin by adding a line that\nindicates the plugin name and library file name to the mysql.plugin\ntable. At server startup, the server loads and initializes any plugin\nthat is listed in the mysql.plugin table. This means that a plugin is\ninstalled with INSTALL PLUGIN only once, not every time the server\nstarts. Plugin loading at startup does not occur if the server is\nstarted with the --skip-grant-tables option.\n\nA plugin library can contain multiple plugins. For each of them to be\ninstalled, use a separate INSTALL PLUGIN statement. Each statement\nnames a different plugin, but all of them specify the same library\nname.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/install-plugin.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/install-plugin.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (419,22,'DECLARE CURSOR','Syntax:\nDECLARE cursor_name CURSOR FOR select_statement\n\nThis statement declares a cursor. Multiple cursors may be declared in a\nstored program, but each cursor in a given block must have a unique\nname.\n\nThe SELECT statement cannot have an INTO clause.\n\nFor information available through SHOW statements, it is possible in\nmany cases to obtain equivalent information by using a cursor with an\nINFORMATION_SCHEMA table.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/declare-cursor.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/declare-cursor.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (420,26,'LOAD DATA','Syntax:\nLOAD DATA [LOW_PRIORITY | CONCURRENT] [LOCAL] INFILE \'file_name\'\n [REPLACE | IGNORE]\n INTO TABLE tbl_name\n [CHARACTER SET charset_name]\n [{FIELDS | COLUMNS}\n [TERMINATED BY \'string\']\n [[OPTIONALLY] ENCLOSED BY \'char\']\n [ESCAPED BY \'char\']\n ]\n [LINES\n [STARTING BY \'string\']\n [TERMINATED BY \'string\']\n ]\n [IGNORE number LINES]\n [(col_name_or_user_var,...)]\n [SET col_name = expr,...]\n\nThe LOAD DATA INFILE statement reads rows from a text file into a table\nat a very high speed. The file name must be given as a literal string.\n\nLOAD DATA INFILE is the complement of SELECT ... INTO OUTFILE. (See\nhttp://dev.mysql.com/doc/refman/5.1/en/select.html.) To write data from\na table to a file, use SELECT ... INTO OUTFILE. To read the file back\ninto a table, use LOAD DATA INFILE. The syntax of the FIELDS and LINES\nclauses is the same for both statements. Both clauses are optional, but\nFIELDS must precede LINES if both are specified.\n\nFor more information about the efficiency of INSERT versus LOAD DATA\nINFILE and speeding up LOAD DATA INFILE, see\nhttp://dev.mysql.com/doc/refman/5.1/en/insert-speed.html.\n\nThe character set indicated by the character_set_database system\nvariable is used to interpret the information in the file. SET NAMES\nand the setting of character_set_client do not affect interpretation of\ninput. If the contents of the input file use a character set that\ndiffers from the default, it is usually preferable to specify the\ncharacter set of the file by using the CHARACTER SET clause, which is\navailable as of MySQL 5.1.17. A character set of binary specifies "no\nconversion."\n\nLOAD DATA INFILE interprets all fields in the file as having the same\ncharacter set, regardless of the data types of the columns into which\nfield values are loaded. For proper interpretation of file contents,\nyou must ensure that it was written with the correct character set. For\nexample, if you write a data file with mysqldump -T or by issuing a\nSELECT ... INTO OUTFILE statement in mysql, be sure to use a\n--default-character-set option with mysqldump or mysql so that output\nis written in the character set to be used when the file is loaded with\nLOAD DATA INFILE.\n\nNote that it is currently not possible to load data files that use the\nucs2 character set.\n\nAs of MySQL 5.1.6, the character_set_filesystem system variable\ncontrols the interpretation of the file name.\n\nYou can also load data files by using the mysqlimport utility; it\noperates by sending a LOAD DATA INFILE statement to the server. The\n--local option causes mysqlimport to read data files from the client\nhost. You can specify the --compress option to get better performance\nover slow networks if the client and server support the compressed\nprotocol. See http://dev.mysql.com/doc/refman/5.1/en/mysqlimport.html.\n\nIf you use LOW_PRIORITY, execution of the LOAD DATA statement is\ndelayed until no other clients are reading from the table. This affects\nonly storage engines that use only table-level locking (such as MyISAM,\nMEMORY, and MERGE).\n\nIf you specify CONCURRENT with a MyISAM table that satisfies the\ncondition for concurrent inserts (that is, it contains no free blocks\nin the middle), other threads can retrieve data from the table while\nLOAD DATA is executing. Using this option affects the performance of\nLOAD DATA a bit, even if no other thread is using the table at the same\ntime.\n\nPrior to MySQL 5.1.43, CONCURRENT was not replicated when using\nstatement-based replication (see Bug#34628\n(http://bugs.mysql.com/bug.php?id=34628)). However, it is replicated\nwhen using row-based replication, regardless of the version. See\nhttp://dev.mysql.com/doc/refman/5.1/en/replication-features-load-data.h\ntml, for more information.\n\n*Note*: Prior to MySQL 5.1.23, LOAD DATA performed very poorly when\nimporting into partitioned tables. The statement now uses buffering to\nimprove performance; however, the buffer uses 130KB memory per\npartition to achieve this. (Bug#26527\n(http://bugs.mysql.com/bug.php?id=26527))\n\nThe LOCAL keyword, if specified, is interpreted with respect to the\nclient end of the connection:\n\no If LOCAL is specified, the file is read by the client program on the\n client host and sent to the server. The file can be given as a full\n path name to specify its exact location. If given as a relative path\n name, the name is interpreted relative to the directory in which the\n client program was started.\n\no If LOCAL is not specified, the file must be located on the server\n host and is read directly by the server. The server uses the\n following rules to locate the file:\n\n o If the file name is an absolute path name, the server uses it as\n given.\n\n o If the file name is a relative path name with one or more leading\n components, the server searches for the file relative to the\n server\'s data directory.\n\n o If a file name with no leading components is given, the server\n looks for the file in the database directory of the default\n database.\n\nNote that, in the non-LOCAL case, these rules mean that a file named as\n./myfile.txt is read from the server\'s data directory, whereas the file\nnamed as myfile.txt is read from the database directory of the default\ndatabase. For example, if db1 is the default database, the following\nLOAD DATA statement reads the file data.txt from the database directory\nfor db1, even though the statement explicitly loads the file into a\ntable in the db2 database:\n\nLOAD DATA INFILE \'data.txt\' INTO TABLE db2.my_table;\n\nWindows path names are specified using forward slashes rather than\nbackslashes. If you do use backslashes, you must double them.\n\n*Note*: A regression in MySQL 5.1.40 caused the database referenced in\na fully qualified table name to be ignored by LOAD DATA when using\nreplication with either STATEMENT or MIXED as the binary logging\nformat; this could lead to problems if the table was not in the current\ndatabase. As a workaround, you can specify the correct database with\nthe USE statement prior to executing LOAD DATA. If necessary, you can\nreset the default database with a second USE statement following the\nLOAD DATA statement. This issue was fixed in MySQL 5.1.41. (Bug#48297\n(http://bugs.mysql.com/bug.php?id=48297))\n\nFor security reasons, when reading text files located on the server,\nthe files must either reside in the database directory or be readable\nby all. Also, to use LOAD DATA INFILE on server files, you must have\nthe FILE privilege. See\nhttp://dev.mysql.com/doc/refman/5.1/en/privileges-provided.html. For\nnon-LOCAL load operations, if the secure_file_priv system variable is\nset to a nonempty directory name, the file to be loaded must be located\nin that directory.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/load-data.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/load-data.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (421,23,'MULTILINESTRING','MultiLineString(ls1,ls2,...)\n\nConstructs a MultiLineString value using LineString or WKB LineString\narguments.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-mysql-specific-functions\n\n','','http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-mysql-specific-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (422,30,'LOCALTIME','Syntax:\nLOCALTIME, LOCALTIME()\n\nLOCALTIME and LOCALTIME() are synonyms for NOW().\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (423,3,'MPOINTFROMTEXT','MPointFromText(wkt[,srid]), MultiPointFromText(wkt[,srid])\n\nConstructs a MULTIPOINT value using its WKT representation and SRID.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-wkt-functions\n\n','','http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-wkt-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (424,20,'BLOB','BLOB[(M)]\n\nA BLOB column with a maximum length of 65,535 (216 - 1) bytes. Each\nBLOB value is stored using a two-byte length prefix that indicates the\nnumber of bytes in the value.\n\nAn optional length M can be given for this type. If this is done, MySQL\ncreates the column as the smallest BLOB type large enough to hold\nvalues M bytes long.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/string-type-overview.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (425,11,'SHA1','Syntax:\nSHA1(str), SHA(str)\n\nCalculates an SHA-1 160-bit checksum for the string, as described in\nRFC 3174 (Secure Hash Algorithm). The value is returned as a binary\nstring of 40 hex digits, or NULL if the argument was NULL. One of the\npossible uses for this function is as a hash key. You can also use it\nas a cryptographic function for storing passwords. SHA() is synonymous\nwith SHA1().\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/encryption-functions.html\n\n','mysql> SELECT SHA1(\'abc\');\n -> \'a9993e364706816aba3e25717850c26c9cd0d89d\'\n','http://dev.mysql.com/doc/refman/5.1/en/encryption-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (426,35,'SUBSTR','Syntax:\nSUBSTR(str,pos), SUBSTR(str FROM pos), SUBSTR(str,pos,len), SUBSTR(str\nFROM pos FOR len)\n\nSUBSTR() is a synonym for SUBSTRING().\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (427,11,'PASSWORD','Syntax:\nPASSWORD(str)\n\nCalculates and returns a password string from the plaintext password\nstr and returns a binary string, or NULL if the argument was NULL. This\nis the function that is used for encrypting MySQL passwords for storage\nin the Password column of the user grant table.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/encryption-functions.html\n\n','mysql> SELECT PASSWORD(\'badpwd\');\n -> \'*AAB3E285149C0135D51A520E1940DD3263DC008C\'\n','http://dev.mysql.com/doc/refman/5.1/en/encryption-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (428,20,'CHAR','[NATIONAL] CHAR[(M)] [CHARACTER SET charset_name] [COLLATE\ncollation_name]\n\nA fixed-length string that is always right-padded with spaces to the\nspecified length when stored. M represents the column length in\ncharacters. The range of M is 0 to 255. If M is omitted, the length is\n1.\n\n*Note*: Trailing spaces are removed when CHAR values are retrieved\nunless the PAD_CHAR_TO_FULL_LENGTH SQL mode is enabled.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/string-type-overview.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (429,30,'UTC_DATE','Syntax:\nUTC_DATE, UTC_DATE()\n\nReturns the current UTC date as a value in \'YYYY-MM-DD\' or YYYYMMDD\nformat, depending on whether the function is used in a string or\nnumeric context.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT UTC_DATE(), UTC_DATE() + 0;\n -> \'2003-08-14\', 20030814\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (430,34,'DIMENSION','Dimension(g)\n\nReturns the inherent dimension of the geometry value g. The result can\nbe -1, 0, 1, or 2. The meaning of these values is given in\nhttp://dev.mysql.com/doc/refman/5.1/en/gis-class-geometry.html.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#general-geometry-property-functions\n\n','mysql> SELECT Dimension(GeomFromText(\'LineString(1 1,2 2)\'));\n+------------------------------------------------+\n| Dimension(GeomFromText(\'LineString(1 1,2 2)\')) |\n+------------------------------------------------+\n| 1 |\n+------------------------------------------------+\n','http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#general-geometry-property-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (431,16,'COUNT DISTINCT','Syntax:\nCOUNT(DISTINCT expr,[expr...])\n\nReturns a count of the number of rows with different non-NULL expr\nvalues.\n\nCOUNT(DISTINCT) returns 0 if there were no matching rows.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/group-by-functions.html\n\n','mysql> SELECT COUNT(DISTINCT results) FROM student;\n','http://dev.mysql.com/doc/refman/5.1/en/group-by-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (432,20,'BIT','BIT[(M)]\n\nA bit-field type. M indicates the number of bits per value, from 1 to\n64. The default is 1 if M is omitted.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/numeric-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/numeric-type-overview.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (433,29,'EQUALS','Equals(g1,g2)\n\nReturns 1 or 0 to indicate whether g1 is spatially equal to g2.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/functions-that-test-spatial-relationships-between-geometries.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/functions-that-test-spatial-relationships-between-geometries.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (434,25,'SHOW CREATE VIEW','Syntax:\nSHOW CREATE VIEW view_name\n\nThis statement shows a CREATE VIEW statement that creates the given\nview.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-create-view.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/show-create-view.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (435,17,'INTERVAL','Syntax:\nINTERVAL(N,N1,N2,N3,...)\n\nReturns 0 if N < N1, 1 if N < N2 and so on or -1 if N is NULL. All\narguments are treated as integers. It is required that N1 < N2 < N3 <\n... < Nn for this function to work correctly. This is because a binary\nsearch is used (very fast).\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html\n\n','mysql> SELECT INTERVAL(23, 1, 15, 17, 30, 44, 200);\n -> 3\nmysql> SELECT INTERVAL(10, 1, 10, 100, 1000);\n -> 2\nmysql> SELECT INTERVAL(22, 23, 30, 44, 200);\n -> 0\n','http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (436,30,'FROM_DAYS','Syntax:\nFROM_DAYS(N)\n\nGiven a day number N, returns a DATE value.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT FROM_DAYS(730669);\n -> \'2007-07-03\'\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (437,37,'ALTER PROCEDURE','Syntax:\nALTER PROCEDURE proc_name [characteristic ...]\n\ncharacteristic:\n { CONTAINS SQL | NO SQL | READS SQL DATA | MODIFIES SQL DATA }\n | SQL SECURITY { DEFINER | INVOKER }\n | COMMENT \'string\'\n\nThis statement can be used to change the characteristics of a stored\nprocedure. More than one change may be specified in an ALTER PROCEDURE\nstatement. However, you cannot change the parameters or body of a\nstored procedure using this statement; to make such changes, you must\ndrop and re-create the procedure using DROP PROCEDURE and CREATE\nPROCEDURE.\n\nYou must have the ALTER ROUTINE privilege for the procedure. (That\nprivilege is granted automatically to the procedure creator.)\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/alter-procedure.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/alter-procedure.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (438,18,'BIT_COUNT','Syntax:\nBIT_COUNT(N)\n\nReturns the number of bits that are set in the argument N.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/bit-functions.html\n\n','mysql> SELECT BIT_COUNT(29), BIT_COUNT(b\'101010\');\n -> 4, 3\n','http://dev.mysql.com/doc/refman/5.1/en/bit-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (439,35,'OCTET_LENGTH','Syntax:\nOCTET_LENGTH(str)\n\nOCTET_LENGTH() is a synonym for LENGTH().\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (440,30,'UTC_TIMESTAMP','Syntax:\nUTC_TIMESTAMP, UTC_TIMESTAMP()\n\nReturns the current UTC date and time as a value in \'YYYY-MM-DD\nHH:MM:SS\' or YYYYMMDDHHMMSS.uuuuuu format, depending on whether the\nfunction is used in a string or numeric context.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT UTC_TIMESTAMP(), UTC_TIMESTAMP() + 0;\n -> \'2003-08-14 18:08:04\', 20030814180804.000000\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (441,11,'AES_ENCRYPT','Syntax:\nAES_ENCRYPT(str,key_str)\n\nAES_ENCRYPT() and AES_DECRYPT() allow encryption and decryption of data\nusing the official AES (Advanced Encryption Standard) algorithm,\npreviously known as "Rijndael." Encoding with a 128-bit key length is\nused, but you can extend it up to 256 bits by modifying the source. We\nchose 128 bits because it is much faster and it is secure enough for\nmost purposes.\n\nAES_ENCRYPT() encrypts a string and returns a binary string.\nAES_DECRYPT() decrypts the encrypted string and returns the original\nstring. The input arguments may be any length. If either argument is\nNULL, the result of this function is also NULL.\n\nBecause AES is a block-level algorithm, padding is used to encode\nuneven length strings and so the result string length may be calculated\nusing this formula:\n\n16 x (trunc(string_length / 16) + 1)\n\nIf AES_DECRYPT() detects invalid data or incorrect padding, it returns\nNULL. However, it is possible for AES_DECRYPT() to return a non-NULL\nvalue (possibly garbage) if the input data or the key is invalid.\n\nYou can use the AES functions to store data in an encrypted form by\nmodifying your queries:\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/encryption-functions.html\n\n','INSERT INTO t VALUES (1,AES_ENCRYPT(\'text\',\'password\'));\n','http://dev.mysql.com/doc/refman/5.1/en/encryption-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (442,4,'+','Syntax:\n+\n\nAddition:\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/arithmetic-functions.html\n\n','mysql> SELECT 3+5;\n -> 8\n','http://dev.mysql.com/doc/refman/5.1/en/arithmetic-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (443,14,'INET_NTOA','Syntax:\nINET_NTOA(expr)\n\nGiven a numeric network address in network byte order (4 or 8 byte),\nreturns the dotted-quad representation of the address as a string.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/miscellaneous-functions.html\n\n','mysql> SELECT INET_NTOA(3520061480);\n -> \'209.207.224.40\'\n','http://dev.mysql.com/doc/refman/5.1/en/miscellaneous-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (444,4,'ACOS','Syntax:\nACOS(X)\n\nReturns the arc cosine of X, that is, the value whose cosine is X.\nReturns NULL if X is not in the range -1 to 1.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html\n\n','mysql> SELECT ACOS(1);\n -> 0\nmysql> SELECT ACOS(1.0001);\n -> NULL\nmysql> SELECT ACOS(0);\n -> 1.5707963267949\n','http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (445,8,'ISOLATION','Syntax:\nSET [GLOBAL | SESSION] TRANSACTION ISOLATION LEVEL\n {\n READ UNCOMMITTED\n | READ COMMITTED\n | REPEATABLE READ\n | SERIALIZABLE\n }\n\nThis statement sets the transaction isolation level globally, for the\ncurrent session, or for the next transaction:\n\no With the GLOBAL keyword, the statement sets the default transaction\n level globally for all subsequent sessions. Existing sessions are\n unaffected.\n\no With the SESSION keyword, the statement sets the default transaction\n level for all subsequent transactions performed within the current\n session.\n\no Without any SESSION or GLOBAL keyword, the statement sets the\n isolation level for the next (not started) transaction performed\n within the current session.\n\nA change to the global default isolation level requires the SUPER\nprivilege. Any session is free to change its session isolation level\n(even in the middle of a transaction), or the isolation level for its\nnext transaction.\n\nTo set the global default isolation level at server startup, use the\n--transaction-isolation=level option to mysqld on the command line or\nin an option file. Values of level for this option use dashes rather\nthan spaces, so the allowable values are READ-UNCOMMITTED,\nREAD-COMMITTED, REPEATABLE-READ, or SERIALIZABLE. For example, to set\nthe default isolation level to REPEATABLE READ, use these lines in the\n[mysqld] section of an option file:\n\n[mysqld]\ntransaction-isolation = REPEATABLE-READ\n\nTo determine the global and session transaction isolation levels at\nruntime, check the value of the tx_isolation system variable:\n\nSELECT @@GLOBAL.tx_isolation, @@tx_isolation;\n\nInnoDB supports each of the translation isolation levels described here\nusing different locking strategies. The default level is REPEATABLE\nREAD. For additional information about InnoDB record-level locks and\nhow it uses them to execute various types of statements, see\nhttp://dev.mysql.com/doc/refman/5.1/en/innodb-record-level-locks.html,\nand http://dev.mysql.com/doc/refman/5.1/en/innodb-locks-set.html.\n\nThe following list describes how MySQL supports the different\ntransaction levels:\n\no READ UNCOMMITTED\n\n SELECT statements are performed in a nonlocking fashion, but a\n possible earlier version of a row might be used. Thus, using this\n isolation level, such reads are not consistent. This is also called a\n "dirty read." Otherwise, this isolation level works like READ\n COMMITTED.\n\no READ COMMITTED\n\n A somewhat Oracle-like isolation level with respect to consistent\n (nonlocking) reads: Each consistent read, even within the same\n transaction, sets and reads its own fresh snapshot. See\n http://dev.mysql.com/doc/refman/5.1/en/innodb-consistent-read.html.\n\n For locking reads (SELECT with FOR UPDATE or LOCK IN SHARE MODE),\n InnoDB locks only index records, not the gaps before them, and thus\n allows the free insertion of new records next to locked records. For\n UPDATE and DELETE statements, locking depends on whether the\n statement uses a unique index with a unique search condition (such as\n WHERE id = 100), or a range-type search condition (such as WHERE id >\n 100). For a unique index with a unique search condition, InnoDB locks\n only the index record found, not the gap before it. For range-type\n searches, InnoDB locks the index range scanned, using gap locks or\n next-key (gap plus index-record) locks to block insertions by other\n sessions into the gaps covered by the range. This is necessary\n because "phantom rows" must be blocked for MySQL replication and\n recovery to work.\n\n *Note*: In MySQL 5.1, if the READ COMMITTED isolation level is used\n or the innodb_locks_unsafe_for_binlog system variable is enabled,\n there is no InnoDB gap locking except for foreign-key constraint\n checking and duplicate-key checking. Also, record locks for\n nonmatching rows are released after MySQL has evaluated the WHERE\n condition. As of MySQL 5.1, if you use READ COMMITTED or enable\n innodb_locks_unsafe_for_binlog, you must use row-based binary\n logging.\n\no REPEATABLE READ\n\n This is the default isolation level for InnoDB. For consistent reads,\n there is an important difference from the READ COMMITTED isolation\n level: All consistent reads within the same transaction read the\n snapshot established by the first read. This convention means that if\n you issue several plain (nonlocking) SELECT statements within the\n same transaction, these SELECT statements are consistent also with\n respect to each other. See\n http://dev.mysql.com/doc/refman/5.1/en/innodb-consistent-read.html.\n\n For locking reads (SELECT with FOR UPDATE or LOCK IN SHARE MODE),\n UPDATE, and DELETE statements, locking depends on whether the\n statement uses a unique index with a unique search condition, or a\n range-type search condition. For a unique index with a unique search\n condition, InnoDB locks only the index record found, not the gap\n before it. For other search conditions, InnoDB locks the index range\n scanned, using gap locks or next-key (gap plus index-record) locks to\n block insertions by other sessions into the gaps covered by the\n range.\n\no SERIALIZABLE\n\n This level is like REPEATABLE READ, but InnoDB implicitly converts\n all plain SELECT statements to SELECT ... LOCK IN SHARE MODE if\n autocommit is disabled. If autocommit is enabled, the SELECT is its\n own transaction. It therefore is known to be read only and can be\n serialized if performed as a consistent (nonlocking) read and need\n not block for other transactions. (This means that to force a plain\n SELECT to block if other transactions have modified the selected\n rows, you should disable autocommit.)\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/set-transaction.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/set-transaction.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (446,4,'CEILING','Syntax:\nCEILING(X)\n\nReturns the smallest integer value not less than X.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html\n\n','mysql> SELECT CEILING(1.23);\n -> 2\nmysql> SELECT CEILING(-1.23);\n -> -1\n','http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (447,4,'SIN','Syntax:\nSIN(X)\n\nReturns the sine of X, where X is given in radians.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html\n\n','mysql> SELECT SIN(PI());\n -> 1.2246063538224e-16\nmysql> SELECT ROUND(SIN(PI()));\n -> 0\n','http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (448,30,'DAYOFWEEK','Syntax:\nDAYOFWEEK(date)\n\nReturns the weekday index for date (1 = Sunday, 2 = Monday, ..., 7 =\nSaturday). These index values correspond to the ODBC standard.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT DAYOFWEEK(\'2007-02-03\');\n -> 7\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (449,25,'SHOW PROCESSLIST','Syntax:\nSHOW [FULL] PROCESSLIST\n\nSHOW PROCESSLIST shows you which threads are running. You can also get\nthis information from the INFORMATION_SCHEMA PROCESSLIST table or the\nmysqladmin processlist command. If you have the PROCESS privilege, you\ncan see all threads. Otherwise, you can see only your own threads (that\nis, threads associated with the MySQL account that you are using). If\nyou do not use the FULL keyword, only the first 100 characters of each\nstatement are shown in the Info field.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-processlist.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/show-processlist.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (450,31,'LINEFROMWKB','LineFromWKB(wkb[,srid]), LineStringFromWKB(wkb[,srid])\n\nConstructs a LINESTRING value using its WKB representation and SRID.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-wkb-functions\n\n','','http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-wkb-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (451,34,'GEOMETRYTYPE','GeometryType(g)\n\nReturns as a string the name of the geometry type of which the geometry\ninstance g is a member. The name corresponds to one of the instantiable\nGeometry subclasses.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#general-geometry-property-functions\n\n','mysql> SELECT GeometryType(GeomFromText(\'POINT(1 1)\'));\n+------------------------------------------+\n| GeometryType(GeomFromText(\'POINT(1 1)\')) |\n+------------------------------------------+\n| POINT |\n+------------------------------------------+\n','http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#general-geometry-property-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (452,37,'CREATE VIEW','Syntax:\nCREATE\n [OR REPLACE]\n [ALGORITHM = {UNDEFINED | MERGE | TEMPTABLE}]\n [DEFINER = { user | CURRENT_USER }]\n [SQL SECURITY { DEFINER | INVOKER }]\n VIEW view_name [(column_list)]\n AS select_statement\n [WITH [CASCADED | LOCAL] CHECK OPTION]\n\nThe CREATE VIEW statement creates a new view, or replaces an existing\none if the OR REPLACE clause is given. If the view does not exist,\nCREATE OR REPLACE VIEW is the same as CREATE VIEW. If the view does\nexist, CREATE OR REPLACE VIEW is the same as ALTER VIEW.\n\nThe select_statement is a SELECT statement that provides the definition\nof the view. (When you select from the view, you select in effect using\nthe SELECT statement.) select_statement can select from base tables or\nother views.\n\nThe view definition is "frozen" at creation time, so changes to the\nunderlying tables afterward do not affect the view definition. For\nexample, if a view is defined as SELECT * on a table, new columns added\nto the table later do not become part of the view.\n\nThe ALGORITHM clause affects how MySQL processes the view. The DEFINER\nand SQL SECURITY clauses specify the security context to be used when\nchecking access privileges at view invocation time. The WITH CHECK\nOPTION clause can be given to constrain inserts or updates to rows in\ntables referenced by the view. These clauses are described later in\nthis section.\n\nThe CREATE VIEW statement requires the CREATE VIEW privilege for the\nview, and some privilege for each column selected by the SELECT\nstatement. For columns used elsewhere in the SELECT statement you must\nhave the SELECT privilege. If the OR REPLACE clause is present, you\nmust also have the DROP privilege for the view.\n\nA view belongs to a database. By default, a new view is created in the\ndefault database. To create the view explicitly in a given database,\nspecify the name as db_name.view_name when you create it.\n\nmysql> CREATE VIEW test.v AS SELECT * FROM t;\n\nBase tables and views share the same namespace within a database, so a\ndatabase cannot contain a base table and a view that have the same\nname.\n\nViews must have unique column names with no duplicates, just like base\ntables. By default, the names of the columns retrieved by the SELECT\nstatement are used for the view column names. To define explicit names\nfor the view columns, the optional column_list clause can be given as a\nlist of comma-separated identifiers. The number of names in column_list\nmust be the same as the number of columns retrieved by the SELECT\nstatement.\n\n*Note*: Prior to MySQL 5.1.29, when you modify an existing view, the\ncurrent view definition is backed up and saved. It is stored in that\ntable\'s database directory, in a subdirectory named arc. The backup\nfile for a view v is named v.frm-00001. If you alter the view again,\nthe next backup is named v.frm-00002. The three latest view backup\ndefinitions are stored. Backed up view definitions are not preserved by\nmysqldump, or any other such programs, but you can retain them using a\nfile copy operation. However, they are not needed for anything but to\nprovide you with a backup of your previous view definition. It is safe\nto remove these backup definitions, but only while mysqld is not\nrunning. If you delete the arc subdirectory or its files while mysqld\nis running, you will receive an error the next time you try to alter\nthe view: mysql> ALTER VIEW v AS SELECT * FROM t; ERROR 6 (HY000):\nError on delete of \'.\\test\\arc/v.frm-0004\' (Errcode: 2)\n\nColumns retrieved by the SELECT statement can be simple references to\ntable columns. They can also be expressions that use functions,\nconstant values, operators, and so forth.\n\nUnqualified table or view names in the SELECT statement are interpreted\nwith respect to the default database. A view can refer to tables or\nviews in other databases by qualifying the table or view name with the\nproper database name.\n\nA view can be created from many kinds of SELECT statements. It can\nrefer to base tables or other views. It can use joins, UNION, and\nsubqueries. The SELECT need not even refer to any tables. The following\nexample defines a view that selects two columns from another table, as\nwell as an expression calculated from those columns:\n\nmysql> CREATE TABLE t (qty INT, price INT);\nmysql> INSERT INTO t VALUES(3, 50);\nmysql> CREATE VIEW v AS SELECT qty, price, qty*price AS value FROM t;\nmysql> SELECT * FROM v;\n+------+-------+-------+\n| qty | price | value |\n+------+-------+-------+\n| 3 | 50 | 150 |\n+------+-------+-------+\n\nA view definition is subject to the following restrictions:\n\no The SELECT statement cannot contain a subquery in the FROM clause.\n\no The SELECT statement cannot refer to system or user variables.\n\no Within a stored program, the definition cannot refer to program\n parameters or local variables.\n\no The SELECT statement cannot refer to prepared statement parameters.\n\no Any table or view referred to in the definition must exist. However,\n after a view has been created, it is possible to drop a table or view\n that the definition refers to. In this case, use of the view results\n in an error. To check a view definition for problems of this kind,\n use the CHECK TABLE statement.\n\no The definition cannot refer to a TEMPORARY table, and you cannot\n create a TEMPORARY view.\n\no Any tables named in the view definition must exist at definition\n time.\n\no You cannot associate a trigger with a view.\n\no As of MySQL 5.1.23, aliases for column names in the SELECT statement\n are checked against the maximum column length of 64 characters (not\n the maximum alias length of 256 characters).\n\nORDER BY is allowed in a view definition, but it is ignored if you\nselect from a view using a statement that has its own ORDER BY.\n\nFor other options or clauses in the definition, they are added to the\noptions or clauses of the statement that references the view, but the\neffect is undefined. For example, if a view definition includes a LIMIT\nclause, and you select from the view using a statement that has its own\nLIMIT clause, it is undefined which limit applies. This same principle\napplies to options such as ALL, DISTINCT, or SQL_SMALL_RESULT that\nfollow the SELECT keyword, and to clauses such as INTO, FOR UPDATE,\nLOCK IN SHARE MODE, and PROCEDURE.\n\nIf you create a view and then change the query processing environment\nby changing system variables, that may affect the results that you get\nfrom the view:\n\nmysql> CREATE VIEW v (mycol) AS SELECT \'abc\';\nQuery OK, 0 rows affected (0.01 sec)\n\nmysql> SET sql_mode = \'\';\nQuery OK, 0 rows affected (0.00 sec)\n\nmysql> SELECT "mycol" FROM v;\n+-------+\n| mycol |\n+-------+\n| mycol |\n+-------+\n1 row in set (0.01 sec)\n\nmysql> SET sql_mode = \'ANSI_QUOTES\';\nQuery OK, 0 rows affected (0.00 sec)\n\nmysql> SELECT "mycol" FROM v;\n+-------+\n| mycol |\n+-------+\n| abc |\n+-------+\n1 row in set (0.00 sec)\n\nThe DEFINER and SQL SECURITY clauses determine which MySQL account to\nuse when checking access privileges for the view when a statement is\nexecuted that references the view. They were addded in MySQL 5.1.2. The\nlegal SQL SECURITY characteristic values are DEFINER and INVOKER. These\nindicate that the required privileges must be held by the user who\ndefined or invoked the view, respectively. The default SQL SECURITY\nvalue is DEFINER.\n\nIf a user value is given for the DEFINER clause, it should be a MySQL\naccount in \'user_name\'@\'host_name\' format (the same format used in the\nGRANT statement). The user_name and host_name values both are required.\nThe definer can also be given as CURRENT_USER or CURRENT_USER(). The\ndefault DEFINER value is the user who executes the CREATE VIEW\nstatement. This is the same as specifying DEFINER = CURRENT_USER\nexplicitly.\n\nIf you specify the DEFINER clause, these rules determine the legal\nDEFINER user values:\n\no If you do not have the SUPER privilege, the only legal user value is\n your own account, either specified literally or by using\n CURRENT_USER. You cannot set the definer to some other account.\n\no If you have the SUPER privilege, you can specify any syntactically\n legal account name. If the account does not actually exist, a warning\n is generated.\n\no If the SQL SECURITY value is DEFINER but the definer account does not\n exist when the view is referenced, an error occurs.\n\nWithin a view definition, CURRENT_USER returns the view\'s DEFINER value\nby default as of MySQL 5.1.12. For older versions, and for views\ndefined with the SQL SECURITY INVOKER characteristic, CURRENT_USER\nreturns the account for the view\'s invoker. For information about user\nauditing within views, see\nhttp://dev.mysql.com/doc/refman/5.1/en/account-activity-auditing.html.\n\nWithin a stored routine that is defined with the SQL SECURITY DEFINER\ncharacteristic, CURRENT_USER returns the routine\'s DEFINER value. This\nalso affects a view defined within such a program, if the view\ndefinition contains a DEFINER value of CURRENT_USER.\n\nAs of MySQL 5.1.2 (when the DEFINER and SQL SECURITY clauses were\nimplemented), view privileges are checked like this:\n\no At view definition time, the view creator must have the privileges\n needed to use the top-level objects accessed by the view. For\n example, if the view definition refers to table columns, the creator\n must have privileges for the columns, as described previously. If the\n definition refers to a stored function, only the privileges needed to\n invoke the function can be checked. The privileges required when the\n function runs can be checked only as it executes: For different\n invocations of the function, different execution paths within the\n function might be taken.\n\no When a view is referenced, privileges for objects accessed by the\n view are checked against the privileges held by the view creator or\n invoker, depending on whether the SQL SECURITY characteristic is\n DEFINER or INVOKER, respectively.\n\no If reference to a view causes execution of a stored function,\n privilege checking for statements executed within the function depend\n on whether the function is defined with a SQL SECURITY characteristic\n of DEFINER or INVOKER. If the security characteristic is DEFINER, the\n function runs with the privileges of its creator. If the\n characteristic is INVOKER, the function runs with the privileges\n determined by the view\'s SQL SECURITY characteristic.\n\nPrior to MySQL 5.1.2 (before the DEFINER and SQL SECURITY clauses were\nimplemented), privileges required for objects used in a view are\nchecked at view creation time.\n\nExample: A view might depend on a stored function, and that function\nmight invoke other stored routines. For example, the following view\ninvokes a stored function f():\n\nCREATE VIEW v AS SELECT * FROM t WHERE t.id = f(t.name);\n\nSuppose that f() contains a statement such as this:\n\nIF name IS NULL then\n CALL p1();\nELSE\n CALL p2();\nEND IF;\n\nThe privileges required for executing statements within f() need to be\nchecked when f() executes. This might mean that privileges are needed\nfor p1() or p2(), depending on the execution path within f(). Those\nprivileges must be checked at runtime, and the user who must possess\nthe privileges is determined by the SQL SECURITY values of the view v\nand the function f().\n\nThe DEFINER and SQL SECURITY clauses for views are extensions to\nstandard SQL. In standard SQL, views are handled using the rules for\nSQL SECURITY INVOKER.\n\nIf you invoke a view that was created before MySQL 5.1.2, it is treated\nas though it was created with a SQL SECURITY DEFINER clause and with a\nDEFINER value that is the same as your account. However, because the\nactual definer is unknown, MySQL issues a warning. To make the warning\ngo away, it is sufficient to re-create the view so that the view\ndefinition includes a DEFINER clause.\n\nThe optional ALGORITHM clause is a MySQL extension to standard SQL. It\naffects how MySQL processes the view. ALGORITHM takes three values:\nMERGE, TEMPTABLE, or UNDEFINED. The default algorithm is UNDEFINED if\nno ALGORITHM clause is present. For more information, see\nhttp://dev.mysql.com/doc/refman/5.1/en/view-algorithms.html.\n\nSome views are updatable. That is, you can use them in statements such\nas UPDATE, DELETE, or INSERT to update the contents of the underlying\ntable. For a view to be updatable, there must be a one-to-one\nrelationship between the rows in the view and the rows in the\nunderlying table. There are also certain other constructs that make a\nview nonupdatable.\n\nThe WITH CHECK OPTION clause can be given for an updatable view to\nprevent inserts or updates to rows except those for which the WHERE\nclause in the select_statement is true.\n\nIn a WITH CHECK OPTION clause for an updatable view, the LOCAL and\nCASCADED keywords determine the scope of check testing when the view is\ndefined in terms of another view. The LOCAL keyword restricts the CHECK\nOPTION only to the view being defined. CASCADED causes the checks for\nunderlying views to be evaluated as well. When neither keyword is\ngiven, the default is CASCADED.\n\nFor more information about updatable views and the WITH CHECK OPTION\nclause, see\nhttp://dev.mysql.com/doc/refman/5.1/en/view-updatability.html.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/create-view.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/create-view.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (453,35,'TRIM','Syntax:\nTRIM([{BOTH | LEADING | TRAILING} [remstr] FROM] str), TRIM([remstr\nFROM] str)\n\nReturns the string str with all remstr prefixes or suffixes removed. If\nnone of the specifiers BOTH, LEADING, or TRAILING is given, BOTH is\nassumed. remstr is optional and, if not specified, spaces are removed.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','mysql> SELECT TRIM(\' bar \');\n -> \'bar\'\nmysql> SELECT TRIM(LEADING \'x\' FROM \'xxxbarxxx\');\n -> \'barxxx\'\nmysql> SELECT TRIM(BOTH \'x\' FROM \'xxxbarxxx\');\n -> \'bar\'\nmysql> SELECT TRIM(TRAILING \'xyz\' FROM \'barxxyz\');\n -> \'barx\'\n','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (454,17,'IS','Syntax:\nIS boolean_value\n\nTests a value against a boolean value, where boolean_value can be TRUE,\nFALSE, or UNKNOWN.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html\n\n','mysql> SELECT 1 IS TRUE, 0 IS FALSE, NULL IS UNKNOWN;\n -> 1, 1, 1\n','http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (455,30,'GET_FORMAT','Syntax:\nGET_FORMAT({DATE|TIME|DATETIME}, {\'EUR\'|\'USA\'|\'JIS\'|\'ISO\'|\'INTERNAL\'})\n\nReturns a format string. This function is useful in combination with\nthe DATE_FORMAT() and the STR_TO_DATE() functions.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT DATE_FORMAT(\'2003-10-03\',GET_FORMAT(DATE,\'EUR\'));\n -> \'03.10.2003\'\nmysql> SELECT STR_TO_DATE(\'10.31.2003\',GET_FORMAT(DATE,\'USA\'));\n -> \'2003-10-31\'\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (456,20,'TINYBLOB','TINYBLOB\n\nA BLOB column with a maximum length of 255 (28 - 1) bytes. Each\nTINYBLOB value is stored using a one-byte length prefix that indicates\nthe number of bytes in the value.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/string-type-overview.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (457,8,'SAVEPOINT','Syntax:\nSAVEPOINT identifier\nROLLBACK [WORK] TO [SAVEPOINT] identifier\nRELEASE SAVEPOINT identifier\n\nInnoDB supports the SQL statements SAVEPOINT, ROLLBACK TO SAVEPOINT,\nRELEASE SAVEPOINT and the optional WORK keyword for ROLLBACK.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/savepoint.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/savepoint.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (458,15,'USER','Syntax:\nUSER()\n\nReturns the current MySQL user name and host name as a string in the\nutf8 character set.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/information-functions.html\n\n','mysql> SELECT USER();\n -> \'davida@localhost\'\n','http://dev.mysql.com/doc/refman/5.1/en/information-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (459,37,'ALTER TABLE','Syntax:\nALTER [ONLINE | OFFLINE] [IGNORE] TABLE tbl_name\n {table_options | partitioning_specification}\n\ntable_options:\n table_option [, table_option] ...\n\ntable_option:\n ADD [COLUMN] col_name column_definition\n [FIRST | AFTER col_name ]\n | ADD [COLUMN] (col_name column_definition,...)\n | ADD {INDEX|KEY} [index_name]\n [index_type] (index_col_name,...) [index_option] ...\n | ADD [CONSTRAINT [symbol]] PRIMARY KEY\n [index_type] (index_col_name,...) [index_option] ...\n | ADD [CONSTRAINT [symbol]]\n UNIQUE [INDEX|KEY] [index_name]\n [index_type] (index_col_name,...) [index_option] ...\n | ADD FULLTEXT [INDEX|KEY] [index_name]\n (index_col_name,...) [index_option] ...\n | ADD SPATIAL [INDEX|KEY] [index_name]\n (index_col_name,...) [index_option] ...\n | ADD [CONSTRAINT [symbol]]\n FOREIGN KEY [index_name] (index_col_name,...)\n reference_definition\n | ALTER [COLUMN] col_name {SET DEFAULT literal | DROP DEFAULT}\n | CHANGE [COLUMN] old_col_name new_col_name column_definition\n [FIRST|AFTER col_name]\n | MODIFY [COLUMN] col_name column_definition\n [FIRST | AFTER col_name]\n | DROP [COLUMN] col_name\n | DROP PRIMARY KEY\n | DROP {INDEX|KEY} index_name\n | DROP FOREIGN KEY fk_symbol\n | DISABLE KEYS\n | ENABLE KEYS\n | RENAME [TO] new_tbl_name\n | ORDER BY col_name [, col_name] ...\n | CONVERT TO CHARACTER SET charset_name [COLLATE collation_name]\n | [DEFAULT] CHARACTER SET [=] charset_name [COLLATE [=] collation_name]\n | DISCARD TABLESPACE\n | IMPORT TABLESPACE\n\npartitioning_specification:\n ADD PARTITION (partition_definition)\n | DROP PARTITION partition_names\n | COALESCE PARTITION number\n | REORGANIZE PARTITION [partition_names INTO (partition_definitions)]\n | ANALYZE PARTITION {partition_names | ALL }\n | CHECK PARTITION {partition_names | ALL }\n | OPTIMIZE PARTITION {partition_names | ALL }\n | REBUILD PARTITION {partition_names | ALL }\n | REPAIR PARTITION {partition_names | ALL }\n | PARTITION BY partitioning_expression\n | REMOVE PARTITIONING\n\nindex_col_name:\n col_name [(length)] [ASC | DESC]\n\nindex_type:\n USING {BTREE | HASH | RTREE}\n\nindex_option:\n KEY_BLOCK_SIZE [=] value\n | index_type\n | WITH PARSER parser_name\n\ntable_options:\n table_option [[,] table_option] ... (see CREATE TABLE options)\n\nALTER TABLE enables you to change the structure of an existing table.\nFor example, you can add or delete columns, create or destroy indexes,\nchange the type of existing columns, or rename columns or the table\nitself. You can also change the comment for the table and type of the\ntable.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/alter-table.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/alter-table.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (460,31,'MPOINTFROMWKB','MPointFromWKB(wkb[,srid]), MultiPointFromWKB(wkb[,srid])\n\nConstructs a MULTIPOINT value using its WKB representation and SRID.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-wkb-functions\n\n','','http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-wkb-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (461,20,'CHAR BYTE','The CHAR BYTE data type is an alias for the BINARY data type. This is a\ncompatibility feature.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/string-type-overview.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (462,19,'REPAIR TABLE','Syntax:\nREPAIR [NO_WRITE_TO_BINLOG | LOCAL] TABLE\n tbl_name [, tbl_name] ...\n [QUICK] [EXTENDED] [USE_FRM]\n\nREPAIR TABLE repairs a possibly corrupted table. By default, it has the\nsame effect as myisamchk --recover tbl_name. REPAIR TABLE works for\nMyISAM and for ARCHIVE tables. Starting with MySQL 5.1.9, REPAIR is\nalso valid for CSV tables. See\nhttp://dev.mysql.com/doc/refman/5.1/en/myisam-storage-engine.html, and\nhttp://dev.mysql.com/doc/refman/5.1/en/archive-storage-engine.html, and\nhttp://dev.mysql.com/doc/refman/5.1/en/csv-storage-engine.html\n\nThis statement requires SELECT and INSERT privileges for the table.\n\nBeginning with MySQL 5.1.27, REPAIR TABLE is also supported for\npartitioned tables. However, the USE_FRM option cannot be used with\nthis statement on a partitioned table.\n\nAlso beginning with MySQL 5.1.27, you can use ALTER TABLE ... REPAIR\nPARTITION to repair one or more partitions; for more information, see\n[HELP ALTER TABLE], and\nhttp://dev.mysql.com/doc/refman/5.1/en/partitioning-maintenance.html.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/repair-table.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/repair-table.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (463,37,'MERGE','The MERGE storage engine, also known as the MRG_MyISAM engine, is a\ncollection of identical MyISAM tables that can be used as one.\n"Identical" means that all tables have identical column and index\ninformation. You cannot merge MyISAM tables in which the columns are\nlisted in a different order, do not have exactly the same columns, or\nhave the indexes in different order. However, any or all of the MyISAM\ntables can be compressed with myisampack. See\nhttp://dev.mysql.com/doc/refman/5.1/en/myisampack.html. Differences in\ntable options such as AVG_ROW_LENGTH, MAX_ROWS, or PACK_KEYS do not\nmatter.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/merge-storage-engine.html\n\n','mysql> CREATE TABLE t1 (\n -> a INT NOT NULL AUTO_INCREMENT PRIMARY KEY,\n -> message CHAR(20)) ENGINE=MyISAM;\nmysql> CREATE TABLE t2 (\n -> a INT NOT NULL AUTO_INCREMENT PRIMARY KEY,\n -> message CHAR(20)) ENGINE=MyISAM;\nmysql> INSERT INTO t1 (message) VALUES (\'Testing\'),(\'table\'),(\'t1\');\nmysql> INSERT INTO t2 (message) VALUES (\'Testing\'),(\'table\'),(\'t2\');\nmysql> CREATE TABLE total (\n -> a INT NOT NULL AUTO_INCREMENT,\n -> message CHAR(20), INDEX(a))\n -> ENGINE=MERGE UNION=(t1,t2) INSERT_METHOD=LAST;\n','http://dev.mysql.com/doc/refman/5.1/en/merge-storage-engine.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (464,37,'CREATE TABLE','Syntax:\nCREATE [TEMPORARY] TABLE [IF NOT EXISTS] tbl_name\n (create_definition,...)\n [table_options]\n [partition_options]\n\nOr:\n\nCREATE [TEMPORARY] TABLE [IF NOT EXISTS] tbl_name\n [(create_definition,...)]\n [table_options]\n [partition_options]\n select_statement\n\nOr:\n\nCREATE [TEMPORARY] TABLE [IF NOT EXISTS] tbl_name\n { LIKE old_tbl_name | (LIKE old_tbl_name) }\n\ncreate_definition:\n col_name column_definition\n | [CONSTRAINT [symbol]] PRIMARY KEY [index_type] (index_col_name,...)\n [index_option] ...\n | {INDEX|KEY} [index_name] [index_type] (index_col_name,...)\n [index_option] ...\n | [CONSTRAINT [symbol]] UNIQUE [INDEX|KEY]\n [index_name] [index_type] (index_col_name,...)\n [index_option] ...\n | {FULLTEXT|SPATIAL} [INDEX|KEY] [index_name] (index_col_name,...)\n [index_option] ...\n | [CONSTRAINT [symbol]] FOREIGN KEY\n [index_name] (index_col_name,...) reference_definition\n | CHECK (expr)\n\ncolumn_definition:\n data_type [NOT NULL | NULL] [DEFAULT default_value]\n [AUTO_INCREMENT] [UNIQUE [KEY] | [PRIMARY] KEY]\n [COMMENT \'string\']\n [COLUMN_FORMAT {FIXED|DYNAMIC|DEFAULT}]\n [STORAGE {DISK|MEMORY|DEFAULT}]\n [reference_definition]\n\ndata_type:\n BIT[(length)]\n | TINYINT[(length)] [UNSIGNED] [ZEROFILL]\n | SMALLINT[(length)] [UNSIGNED] [ZEROFILL]\n | MEDIUMINT[(length)] [UNSIGNED] [ZEROFILL]\n | INT[(length)] [UNSIGNED] [ZEROFILL]\n | INTEGER[(length)] [UNSIGNED] [ZEROFILL]\n | BIGINT[(length)] [UNSIGNED] [ZEROFILL]\n | REAL[(length,decimals)] [UNSIGNED] [ZEROFILL]\n | DOUBLE[(length,decimals)] [UNSIGNED] [ZEROFILL]\n | FLOAT[(length,decimals)] [UNSIGNED] [ZEROFILL]\n | DECIMAL[(length[,decimals])] [UNSIGNED] [ZEROFILL]\n | NUMERIC[(length[,decimals])] [UNSIGNED] [ZEROFILL]\n | DATE\n | TIME\n | TIMESTAMP\n | DATETIME\n | YEAR\n | CHAR[(length)]\n [CHARACTER SET charset_name] [COLLATE collation_name]\n | VARCHAR(length)\n [CHARACTER SET charset_name] [COLLATE collation_name]\n | BINARY[(length)]\n | VARBINARY(length)\n | TINYBLOB\n | BLOB\n | MEDIUMBLOB\n | LONGBLOB\n | TINYTEXT [BINARY]\n [CHARACTER SET charset_name] [COLLATE collation_name]\n | TEXT [BINARY]\n [CHARACTER SET charset_name] [COLLATE collation_name]\n | MEDIUMTEXT [BINARY]\n [CHARACTER SET charset_name] [COLLATE collation_name]\n | LONGTEXT [BINARY]\n [CHARACTER SET charset_name] [COLLATE collation_name]\n | ENUM(value1,value2,value3,...)\n [CHARACTER SET charset_name] [COLLATE collation_name]\n | SET(value1,value2,value3,...)\n [CHARACTER SET charset_name] [COLLATE collation_name]\n | spatial_type\n\nindex_col_name:\n col_name [(length)] [ASC | DESC]\n\nindex_type:\n USING {BTREE | HASH | RTREE}\n\nindex_option:\n KEY_BLOCK_SIZE [=] value\n | index_type\n | WITH PARSER parser_name\n\nreference_definition:\n REFERENCES tbl_name (index_col_name,...)\n [MATCH FULL | MATCH PARTIAL | MATCH SIMPLE]\n [ON DELETE reference_option]\n [ON UPDATE reference_option]\n\nreference_option:\n RESTRICT | CASCADE | SET NULL | NO ACTION\n\ntable_options:\n table_option [[,] table_option] ...\n\ntable_option:\n ENGINE [=] engine_name\n | AUTO_INCREMENT [=] value\n | AVG_ROW_LENGTH [=] value\n | [DEFAULT] CHARACTER SET [=] charset_name\n | CHECKSUM [=] {0 | 1}\n | [DEFAULT] COLLATE [=] collation_name\n | COMMENT [=] \'string\'\n | CONNECTION [=] \'connect_string\'\n | DATA DIRECTORY [=] \'absolute path to directory\'\n | DELAY_KEY_WRITE [=] {0 | 1}\n | INDEX DIRECTORY [=] \'absolute path to directory\'\n | INSERT_METHOD [=] { NO | FIRST | LAST }\n | KEY_BLOCK_SIZE [=] value\n | MAX_ROWS [=] value\n | MIN_ROWS [=] value\n | PACK_KEYS [=] {0 | 1 | DEFAULT}\n | PASSWORD [=] \'string\'\n | ROW_FORMAT [=] {DEFAULT|DYNAMIC|FIXED|COMPRESSED|REDUNDANT|COMPACT}\n | TABLESPACE tablespace_name [STORAGE {DISK|MEMORY|DEFAULT}]\n | UNION [=] (tbl_name[,tbl_name]...)\n\npartition_options:\n PARTITION BY\n { [LINEAR] HASH(expr)\n | [LINEAR] KEY(column_list)\n | RANGE(expr)\n | LIST(expr) }\n [PARTITIONS num]\n [SUBPARTITION BY\n { [LINEAR] HASH(expr)\n | [LINEAR] KEY(column_list) }\n [SUBPARTITIONS num]\n ]\n [(partition_definition [, partition_definition] ...)]\n\npartition_definition:\n PARTITION partition_name\n [VALUES {LESS THAN {(expr) | MAXVALUE} | IN (value_list)}]\n [[STORAGE] ENGINE [=] engine_name]\n [COMMENT [=] \'comment_text\' ]\n [DATA DIRECTORY [=] \'data_dir\']\n [INDEX DIRECTORY [=] \'index_dir\']\n [MAX_ROWS [=] max_number_of_rows]\n [MIN_ROWS [=] min_number_of_rows]\n [TABLESPACE [=] tablespace_name]\n [NODEGROUP [=] node_group_id]\n [(subpartition_definition [, subpartition_definition] ...)]\n\nsubpartition_definition:\n SUBPARTITION logical_name\n [[STORAGE] ENGINE [=] engine_name]\n [COMMENT [=] \'comment_text\' ]\n [DATA DIRECTORY [=] \'data_dir\']\n [INDEX DIRECTORY [=] \'index_dir\']\n [MAX_ROWS [=] max_number_of_rows]\n [MIN_ROWS [=] min_number_of_rows]\n [TABLESPACE [=] tablespace_name]\n [NODEGROUP [=] node_group_id]\n\nselect_statement:\n [IGNORE | REPLACE] [AS] SELECT ... (Some legal select statement)\n\nCREATE TABLE creates a table with the given name. You must have the\nCREATE privilege for the table.\n\nRules for allowable table names are given in\nhttp://dev.mysql.com/doc/refman/5.1/en/identifiers.html. By default,\nthe table is created in the default database. An error occurs if the\ntable exists, if there is no default database, or if the database does\nnot exist.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/create-table.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/create-table.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (465,17,'>','Syntax:\n>\n\nGreater than:\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html\n\n','mysql> SELECT 2 > 2;\n -> 0\n','http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (466,19,'ANALYZE TABLE','Syntax:\nANALYZE [NO_WRITE_TO_BINLOG | LOCAL] TABLE\n tbl_name [, tbl_name] ...\n\nANALYZE TABLE analyzes and stores the key distribution for a table.\nDuring the analysis, the table is locked with a read lock for MyISAM.\nFor InnoDB the table is locked with a write lock. This statement works\nwith MyISAM and InnoDB tables. For MyISAM tables, this statement is\nequivalent to using myisamchk --analyze.\n\nFor more information on how the analysis works within InnoDB, see\nhttp://dev.mysql.com/doc/refman/5.1/en/innodb-restrictions.html.\n\nMySQL uses the stored key distribution to decide the order in which\ntables should be joined when you perform a join on something other than\na constant. In addition, key distributions can be used when deciding\nwhich indexes to use for a specific table within a query.\n\nThis statement requires SELECT and INSERT privileges for the table.\n\nBeginning with MySQL 5.1.27, ANALYZE TABLE is also supported for\npartitioned tables. Also beginning with MySQL 5.1.27, you can use ALTER\nTABLE ... ANALYZE PARTITION to analyze one or more partitions; for more\ninformation, see [HELP ALTER TABLE], and\nhttp://dev.mysql.com/doc/refman/5.1/en/partitioning-maintenance.html.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/analyze-table.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/analyze-table.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (467,30,'MICROSECOND','Syntax:\nMICROSECOND(expr)\n\nReturns the microseconds from the time or datetime expression expr as a\nnumber in the range from 0 to 999999.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT MICROSECOND(\'12:00:00.123456\');\n -> 123456\nmysql> SELECT MICROSECOND(\'2009-12-31 23:59:59.000010\');\n -> 10\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (468,37,'CONSTRAINT','InnoDB supports foreign key constraints. The syntax for a foreign key\nconstraint definition in InnoDB looks like this:\n\n[CONSTRAINT [symbol]] FOREIGN KEY\n [index_name] (index_col_name, ...)\n REFERENCES tbl_name (index_col_name,...)\n [ON DELETE reference_option]\n [ON UPDATE reference_option]\n\nreference_option:\n RESTRICT | CASCADE | SET NULL | NO ACTION\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/innodb-foreign-key-constraints.html\n\n','CREATE TABLE product (category INT NOT NULL, id INT NOT NULL,\n price DECIMAL,\n PRIMARY KEY(category, id)) ENGINE=INNODB;\nCREATE TABLE customer (id INT NOT NULL,\n PRIMARY KEY (id)) ENGINE=INNODB;\nCREATE TABLE product_order (no INT NOT NULL AUTO_INCREMENT,\n product_category INT NOT NULL,\n product_id INT NOT NULL,\n customer_id INT NOT NULL,\n PRIMARY KEY(no),\n INDEX (product_category, product_id),\n FOREIGN KEY (product_category, product_id)\n REFERENCES product(category, id)\n ON UPDATE CASCADE ON DELETE RESTRICT,\n INDEX (customer_id),\n FOREIGN KEY (customer_id)\n REFERENCES customer(id)) ENGINE=INNODB;\n','http://dev.mysql.com/doc/refman/5.1/en/innodb-foreign-key-constraints.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (469,37,'CREATE SERVER','Syntax:\nCREATE SERVER server_name\n FOREIGN DATA WRAPPER wrapper_name\n OPTIONS (option [, option] ...)\n\noption:\n { HOST character-literal\n | DATABASE character-literal\n | USER character-literal\n | PASSWORD character-literal\n | SOCKET character-literal\n | OWNER character-literal\n | PORT numeric-literal }\n\nThis statement creates the definition of a server for use with the\nFEDERATED storage engine. The CREATE SERVER statement creates a new row\nwithin the servers table within the mysql database. This statement\nrequires the SUPER privilege.\n\nThe server_name should be a unique reference to the server. Server\ndefinitions are global within the scope of the server, it is not\npossible to qualify the server definition to a specific database.\nserver_name has a maximum length of 64 characters (names longer than 64\ncharacters are silently truncated), and is case insensitive. You may\nspecify the name as a quoted string.\n\nThe wrapper_name should be mysql, and may be quoted with single quotes.\nOther values for wrapper_name are not currently supported.\n\nFor each option you must specify either a character literal or numeric\nliteral. Character literals are UTF-8, support a maximum length of 64\ncharacters and default to a blank (empty) string. String literals are\nsilently truncated to 64 characters. Numeric literals must be a number\nbetween 0 and 9999, default value is 0.\n\n*Note*: Note that the OWNER option is currently not applied, and has no\neffect on the ownership or operation of the server connection that is\ncreated.\n\nThe CREATE SERVER statement creates an entry in the mysql.servers table\nthat can later be used with the CREATE TABLE statement when creating a\nFEDERATED table. The options that you specify will be used to populate\nthe columns in the mysql.servers table. The table columns are\nServer_name, Host, Db, Username, Password, Port and Socket.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/create-server.html\n\n','CREATE SERVER s\nFOREIGN DATA WRAPPER mysql\nOPTIONS (USER \'Remote\', HOST \'192.168.1.106\', DATABASE \'test\');\n','http://dev.mysql.com/doc/refman/5.1/en/create-server.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (470,35,'FIELD','Syntax:\nFIELD(str,str1,str2,str3,...)\n\nReturns the index (position) of str in the str1, str2, str3, ... list.\nReturns 0 if str is not found.\n\nIf all arguments to FIELD() are strings, all arguments are compared as\nstrings. If all arguments are numbers, they are compared as numbers.\nOtherwise, the arguments are compared as double.\n\nIf str is NULL, the return value is 0 because NULL fails equality\ncomparison with any value. FIELD() is the complement of ELT().\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','mysql> SELECT FIELD(\'ej\', \'Hej\', \'ej\', \'Heja\', \'hej\', \'foo\');\n -> 2\nmysql> SELECT FIELD(\'fo\', \'Hej\', \'ej\', \'Heja\', \'hej\', \'foo\');\n -> 0\n','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (471,30,'MAKETIME','Syntax:\nMAKETIME(hour,minute,second)\n\nReturns a time value calculated from the hour, minute, and second\narguments.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT MAKETIME(12,15,30);\n -> \'12:15:30\'\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (472,30,'CURDATE','Syntax:\nCURDATE()\n\nReturns the current date as a value in \'YYYY-MM-DD\' or YYYYMMDD format,\ndepending on whether the function is used in a string or numeric\ncontext.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT CURDATE();\n -> \'2008-06-13\'\nmysql> SELECT CURDATE() + 0;\n -> 20080613\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (473,9,'SET PASSWORD','Syntax:\nSET PASSWORD [FOR user] =\n {\n PASSWORD(\'some password\')\n | OLD_PASSWORD(\'some password\')\n | \'encrypted password\'\n }\n\nThe SET PASSWORD statement assigns a password to an existing MySQL user\naccount.\n\nIf the password is specified using the PASSWORD() or OLD_PASSWORD()\nfunction, the literal text of the password should be given. If the\npassword is specified without using either function, the password\nshould be the already-encrypted password value as returned by\nPASSWORD().\n\nWith no FOR clause, this statement sets the password for the current\nuser. Any client that has connected to the server using a nonanonymous\naccount can change the password for that account.\n\nWith a FOR clause, this statement sets the password for a specific\naccount on the current server host. Only clients that have the UPDATE\nprivilege for the mysql database can do this. The user value should be\ngiven in user_name@host_name format, where user_name and host_name are\nexactly as they are listed in the User and Host columns of the\nmysql.user table entry. For example, if you had an entry with User and\nHost column values of \'bob\' and \'%.loc.gov\', you would write the\nstatement like this:\n\nSET PASSWORD FOR \'bob\'@\'%.loc.gov\' = PASSWORD(\'newpass\');\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/set-password.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/set-password.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (474,37,'ALTER TABLESPACE','Syntax:\nALTER TABLESPACE tablespace_name\n {ADD|DROP} DATAFILE \'file_name\'\n [INITIAL_SIZE [=] size]\n [WAIT]\n ENGINE [=] engine_name\n\nThis statement can be used either to add a new data file, or to drop a\ndata file from a tablespace.\n\nThe ADD DATAFILE variant allows you to specify an initial size using an\nINITIAL_SIZE clause, where size is measured in bytes; the default value\nis 128M (128 megabytes). You may optionally follow this integer value\nwith a one-letter abbreviation for an order of magnitude, similar to\nthose used in my.cnf. Generally, this is one of the letters M (for\nmegabytes) or G (for gigabytes).\n\n*Note*: All MySQL Cluster Disk Data objects share the same namespace.\nThis means that each Disk Data object must be uniquely named (and not\nmerely each Disk Data object of a given type). For example, you cannot\nhave a tablespace and an data file with the same name, or an undo log\nfile and a with the same name.\n\nPrior to MySQL Cluster NDB 6.2.17, 6.3.23, and 6.4.3, path and file\nnames for data files could not be longer than 128 characters.\n(Bug#31770 (http://bugs.mysql.com/bug.php?id=31770))\n\nOn 32-bit systems, the maximum supported value for INITIAL_SIZE is 4G.\n(Bug#29186 (http://bugs.mysql.com/bug.php?id=29186))\n\nINITIAL_SIZE is rounded as for CREATE TABLESPACE. Beginning with MySQL\nCluster NDB 6.2.19, MySQL Cluster NDB 6.3.32, MySQL Cluster NDB 7.0.13,\nand MySQL Cluster NDB 7.1.2, this rounding is done explicitly (also as\nwith CREATE TABLESPACE).\n\nOnce a data file has been created, its size cannot be changed; however,\nyou can add more data files to the tablespace using additional ALTER\nTABLESPACE ... ADD DATAFILE statements.\n\nUsing DROP DATAFILE with ALTER TABLESPACE drops the data file\n\'file_name\' from the tablespace. This file must already have been added\nto the tablespace using CREATE TABLESPACE or ALTER TABLESPACE;\notherwise an error will result.\n\nBoth ALTER TABLESPACE ... ADD DATAFILE and ALTER TABLESPACE ... DROP\nDATAFILE require an ENGINE clause which specifies the storage engine\nused by the tablespace. In MySQL 5.1, the only accepted values for\nengine_name are NDB and NDBCLUSTER.\n\nWAIT is parsed but otherwise ignored, and so has no effect in MySQL\n5.1. It is intended for future expansion.\n\nWhen ALTER TABLESPACE ... ADD DATAFILE is used with ENGINE = NDB, a\ndata file is created on each Cluster data node. You can verify that the\ndata files were created and obtain information about them by querying\nthe INFORMATION_SCHEMA.FILES table. For example, the following query\nshows all data files belonging to the tablespace named newts:\n\nmysql> SELECT LOGFILE_GROUP_NAME, FILE_NAME, EXTRA\n -> FROM INFORMATION_SCHEMA.FILES\n -> WHERE TABLESPACE_NAME = \'newts\' AND FILE_TYPE = \'DATAFILE\';\n+--------------------+--------------+----------------+\n| LOGFILE_GROUP_NAME | FILE_NAME | EXTRA |\n+--------------------+--------------+----------------+\n| lg_3 | newdata.dat | CLUSTER_NODE=3 |\n| lg_3 | newdata.dat | CLUSTER_NODE=4 |\n| lg_3 | newdata2.dat | CLUSTER_NODE=3 |\n| lg_3 | newdata2.dat | CLUSTER_NODE=4 |\n+--------------------+--------------+----------------+\n2 rows in set (0.03 sec)\n\nSee http://dev.mysql.com/doc/refman/5.1/en/files-table.html.\n\nALTER TABLESPACE was added in MySQL 5.1.6. In MySQL 5.1, it is useful\nonly with Disk Data storage for MySQL Cluster. See\nhttp://dev.mysql.com/doc/refman/5.1/en/mysql-cluster-disk-data.html.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/alter-tablespace.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/alter-tablespace.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (475,20,'ENUM','ENUM(\'value1\',\'value2\',...) [CHARACTER SET charset_name] [COLLATE\ncollation_name]\n\nAn enumeration. A string object that can have only one value, chosen\nfrom the list of values \'value1\', \'value2\', ..., NULL or the special \'\'\nerror value. An ENUM column can have a maximum of 65,535 distinct\nvalues. ENUM values are represented internally as integers.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/string-type-overview.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (476,7,'IF FUNCTION','Syntax:\nIF(expr1,expr2,expr3)\n\nIf expr1 is TRUE (expr1 <> 0 and expr1 <> NULL) then IF() returns\nexpr2; otherwise it returns expr3. IF() returns a numeric or string\nvalue, depending on the context in which it is used.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/control-flow-functions.html\n\n','mysql> SELECT IF(1>2,2,3);\n -> 3\nmysql> SELECT IF(1<2,\'yes\',\'no\');\n -> \'yes\'\nmysql> SELECT IF(STRCMP(\'test\',\'test1\'),\'no\',\'yes\');\n -> \'no\'\n','http://dev.mysql.com/doc/refman/5.1/en/control-flow-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (477,15,'DATABASE','Syntax:\nDATABASE()\n\nReturns the default (current) database name as a string in the utf8\ncharacter set. If there is no default database, DATABASE() returns\nNULL. Within a stored routine, the default database is the database\nthat the routine is associated with, which is not necessarily the same\nas the database that is the default in the calling context.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/information-functions.html\n\n','mysql> SELECT DATABASE();\n -> \'test\'\n','http://dev.mysql.com/doc/refman/5.1/en/information-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (478,31,'POINTFROMWKB','PointFromWKB(wkb[,srid])\n\nConstructs a POINT value using its WKB representation and SRID.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-wkb-functions\n\n','','http://dev.mysql.com/doc/refman/5.1/en/creating-spatial-values.html#gis-wkb-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (479,4,'POWER','Syntax:\nPOWER(X,Y)\n\nThis is a synonym for POW().\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (480,4,'ATAN','Syntax:\nATAN(X)\n\nReturns the arc tangent of X, that is, the value whose tangent is X.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html\n\n','mysql> SELECT ATAN(2);\n -> 1.1071487177941\nmysql> SELECT ATAN(-2);\n -> -1.1071487177941\n','http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (481,35,'STRCMP','Syntax:\nSTRCMP(expr1,expr2)\n\nSTRCMP() returns 0 if the strings are the same, -1 if the first\nargument is smaller than the second according to the current sort\norder, and 1 otherwise.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-comparison-functions.html\n\n','mysql> SELECT STRCMP(\'text\', \'text2\');\n -> -1\nmysql> SELECT STRCMP(\'text2\', \'text\');\n -> 1\nmysql> SELECT STRCMP(\'text\', \'text\');\n -> 0\n','http://dev.mysql.com/doc/refman/5.1/en/string-comparison-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (482,26,'INSERT DELAYED','Syntax:\nINSERT DELAYED ...\n\nThe DELAYED option for the INSERT statement is a MySQL extension to\nstandard SQL that is very useful if you have clients that cannot or\nneed not wait for the INSERT to complete. This is a common situation\nwhen you use MySQL for logging and you also periodically run SELECT and\nUPDATE statements that take a long time to complete.\n\nWhen a client uses INSERT DELAYED, it gets an okay from the server at\nonce, and the row is queued to be inserted when the table is not in use\nby any other thread.\n\nAnother major benefit of using INSERT DELAYED is that inserts from many\nclients are bundled together and written in one block. This is much\nfaster than performing many separate inserts.\n\nNote that INSERT DELAYED is slower than a normal INSERT if the table is\nnot otherwise in use. There is also the additional overhead for the\nserver to handle a separate thread for each table for which there are\ndelayed rows. This means that you should use INSERT DELAYED only when\nyou are really sure that you need it.\n\nThe queued rows are held only in memory until they are inserted into\nthe table. This means that if you terminate mysqld forcibly (for\nexample, with kill -9) or if mysqld dies unexpectedly, any queued rows\nthat have not been written to disk are lost.\n\nThere are some constraints on the use of DELAYED:\n\no INSERT DELAYED works only with MyISAM, MEMORY, ARCHIVE, and (as of\n MySQL 5.1.19) BLACKHOLE tables. For engines that do not support\n DELAYED, an error occurs.\n\no An error occurs for INSERT DELAYED if used with a table that has been\n locked with LOCK TABLES because the insert must be handled by a\n separate thread, not by the session that holds the lock.\n\no For MyISAM tables, if there are no free blocks in the middle of the\n data file, concurrent SELECT and INSERT statements are supported.\n Under these circumstances, you very seldom need to use INSERT DELAYED\n with MyISAM.\n\no INSERT DELAYED should be used only for INSERT statements that specify\n value lists. The server ignores DELAYED for INSERT ... SELECT or\n INSERT ... ON DUPLICATE KEY UPDATE statements.\n\no Because the INSERT DELAYED statement returns immediately, before the\n rows are inserted, you cannot use LAST_INSERT_ID() to get the\n AUTO_INCREMENT value that the statement might generate.\n\no DELAYED rows are not visible to SELECT statements until they actually\n have been inserted.\n\no INSERT DELAYED is treated as a normal INSERT if the statement inserts\n multiple rows and binary logging is enabled and the global logging\n format is to use statement-based logging (binlog_format is set to\n STATEMENT). This restriction does not apply to row-based binary\n logging.\n\no DELAYED is ignored on slave replication servers, so that INSERT\n DELAYED is treated as a normal INSERT on slaves. This is because\n DELAYED could cause the slave to have different data than the master.\n\no Pending INSERT DELAYED statements are lost if a table is write locked\n and ALTER TABLE is used to modify the table structure.\n\no INSERT DELAYED is not supported for views.\n\no INSERT DELAYED is not supported for partitioned tables.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/insert-delayed.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/insert-delayed.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (483,25,'SHOW PROFILE','Syntax:\nSHOW PROFILES\n\nThe SHOW PROFILE statement display profiling information that indicates\nresource usage for statements executed during the course of the current\nsession. It is used together with SHOW PROFILES; see [HELP SHOW\nPROFILES].\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-profile.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/show-profile.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (484,25,'SHOW PROCEDURE CODE','Syntax:\nSHOW PROCEDURE CODE proc_name\n\nThis statement is a MySQL extension that is available only for servers\nthat have been built with debugging support. It displays a\nrepresentation of the internal implementation of the named stored\nprocedure. A similar statement, SHOW FUNCTION CODE, displays\ninformation about stored functions (see [HELP SHOW FUNCTION CODE]).\n\nBoth statements require that you be the owner of the routine or have\nSELECT access to the mysql.proc table.\n\nIf the named routine is available, each statement produces a result\nset. Each row in the result set corresponds to one "instruction" in the\nroutine. The first column is Pos, which is an ordinal number beginning\nwith 0. The second column is Instruction, which contains an SQL\nstatement (usually changed from the original source), or a directive\nwhich has meaning only to the stored-routine handler.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-procedure-code.html\n\n','mysql> DELIMITER //\nmysql> CREATE PROCEDURE p1 ()\n -> BEGIN\n -> DECLARE fanta INT DEFAULT 55;\n -> DROP TABLE t2;\n -> LOOP\n -> INSERT INTO t3 VALUES (fanta);\n -> END LOOP;\n -> END//\nQuery OK, 0 rows affected (0.00 sec)\n\nmysql> SHOW PROCEDURE CODE p1//\n+-----+----------------------------------------+\n| Pos | Instruction |\n+-----+----------------------------------------+\n| 0 | set fanta@0 55 |\n| 1 | stmt 9 "DROP TABLE t2" |\n| 2 | stmt 5 "INSERT INTO t3 VALUES (fanta)" |\n| 3 | jump 2 |\n+-----+----------------------------------------+\n4 rows in set (0.00 sec)\n','http://dev.mysql.com/doc/refman/5.1/en/show-procedure-code.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (485,20,'MEDIUMTEXT','MEDIUMTEXT [CHARACTER SET charset_name] [COLLATE collation_name]\n\nA TEXT column with a maximum length of 16,777,215 (224 - 1) characters.\nThe effective maximum length is less if the value contains multi-byte\ncharacters. Each MEDIUMTEXT value is stored using a three-byte length\nprefix that indicates the number of bytes in the value.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/string-type-overview.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (486,4,'LN','Syntax:\nLN(X)\n\nReturns the natural logarithm of X; that is, the base-e logarithm of X.\nIf X is less than or equal to 0, then NULL is returned.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html\n\n','mysql> SELECT LN(2);\n -> 0.69314718055995\nmysql> SELECT LN(-2);\n -> NULL\n','http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (487,22,'RETURN','Syntax:\nRETURN expr\n\nThe RETURN statement terminates execution of a stored function and\nreturns the value expr to the function caller. There must be at least\none RETURN statement in a stored function. There may be more than one\nif the function has multiple exit points.\n\nThis statement is not used in stored procedures, triggers, or events.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/return.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/return.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (488,25,'SHOW COLLATION','Syntax:\nSHOW COLLATION\n [LIKE \'pattern\' | WHERE expr]\n\nThis statement lists collations supported by the server. By default,\nthe output from SHOW COLLATION includes all available collations. The\nLIKE clause, if present, indicates which collation names to match. The\nWHERE clause can be given to select rows using more general conditions,\nas discussed in\nhttp://dev.mysql.com/doc/refman/5.1/en/extended-show.html. For example:\n\nmysql> SHOW COLLATION LIKE \'latin1%\';\n+-------------------+---------+----+---------+----------+---------+\n| Collation | Charset | Id | Default | Compiled | Sortlen |\n+-------------------+---------+----+---------+----------+---------+\n| latin1_german1_ci | latin1 | 5 | | | 0 |\n| latin1_swedish_ci | latin1 | 8 | Yes | Yes | 0 |\n| latin1_danish_ci | latin1 | 15 | | | 0 |\n| latin1_german2_ci | latin1 | 31 | | Yes | 2 |\n| latin1_bin | latin1 | 47 | | Yes | 0 |\n| latin1_general_ci | latin1 | 48 | | | 0 |\n| latin1_general_cs | latin1 | 49 | | | 0 |\n| latin1_spanish_ci | latin1 | 94 | | | 0 |\n+-------------------+---------+----+---------+----------+---------+\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/show-collation.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/show-collation.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (489,4,'LOG','Syntax:\nLOG(X), LOG(B,X)\n\nIf called with one parameter, this function returns the natural\nlogarithm of X. If X is less than or equal to 0, then NULL is returned.\n\nThe inverse of this function (when called with a single argument) is\nthe EXP() function.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html\n\n','mysql> SELECT LOG(2);\n -> 0.69314718055995\nmysql> SELECT LOG(-2);\n -> NULL\n','http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (490,25,'SET SQL_LOG_BIN','Syntax:\nSET sql_log_bin = {0|1}\n\nDisables or enables binary logging for the current session (sql_log_bin\nis a session variable) if the client has the SUPER privilege. The\nstatement fails with an error if the client does not have that\nprivilege.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/set-sql-log-bin.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/set-sql-log-bin.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (491,17,'!=','Syntax:\n<>, !=\n\nNot equal:\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html\n\n','mysql> SELECT \'.01\' <> \'0.01\';\n -> 1\nmysql> SELECT .01 <> \'0.01\';\n -> 0\nmysql> SELECT \'zapp\' <> \'zappp\';\n -> 1\n','http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (492,22,'WHILE','Syntax:\n[begin_label:] WHILE search_condition DO\n statement_list\nEND WHILE [end_label]\n\nThe statement list within a WHILE statement is repeated as long as the\nsearch_condition is true. statement_list consists of one or more\nstatements.\n\nA WHILE statement can be labeled. See [HELP BEGIN END] for the rules\nregarding label use.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/while-statement.html\n\n','CREATE PROCEDURE dowhile()\nBEGIN\n DECLARE v1 INT DEFAULT 5;\n\n WHILE v1 > 0 DO\n ...\n SET v1 = v1 - 1;\n END WHILE;\nEND\n','http://dev.mysql.com/doc/refman/5.1/en/while-statement.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (493,11,'AES_DECRYPT','Syntax:\nAES_DECRYPT(crypt_str,key_str)\n\nThis function allows decryption of data using the official AES\n(Advanced Encryption Standard) algorithm. For more information, see the\ndescription of AES_ENCRYPT().\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/encryption-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/encryption-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (494,30,'DAYNAME','Syntax:\nDAYNAME(date)\n\nReturns the name of the weekday for date. As of MySQL 5.1.12, the\nlanguage used for the name is controlled by the value of the\nlc_time_names system variable\n(http://dev.mysql.com/doc/refman/5.1/en/locale-support.html).\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html\n\n','mysql> SELECT DAYNAME(\'2007-02-03\');\n -> \'Saturday\'\n','http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (495,15,'COERCIBILITY','Syntax:\nCOERCIBILITY(str)\n\nReturns the collation coercibility value of the string argument.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/information-functions.html\n\n','mysql> SELECT COERCIBILITY(\'abc\' COLLATE latin1_swedish_ci);\n -> 0\nmysql> SELECT COERCIBILITY(USER());\n -> 3\nmysql> SELECT COERCIBILITY(\'abc\');\n -> 4\n','http://dev.mysql.com/doc/refman/5.1/en/information-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (496,20,'INT','INT[(M)] [UNSIGNED] [ZEROFILL]\n\nA normal-size integer. The signed range is -2147483648 to 2147483647.\nThe unsigned range is 0 to 4294967295.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/numeric-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.1/en/numeric-type-overview.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (497,12,'GLENGTH','GLength(ls)\n\nReturns as a double-precision number the length of the LineString value\nls in its associated spatial reference.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#linestring-property-functions\n\n','mysql> SET @ls = \'LineString(1 1,2 2,3 3)\';\nmysql> SELECT GLength(GeomFromText(@ls));\n+----------------------------+\n| GLength(GeomFromText(@ls)) |\n+----------------------------+\n| 2.8284271247462 |\n+----------------------------+\n','http://dev.mysql.com/doc/refman/5.1/en/geometry-property-functions.html#linestring-property-functions'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (498,4,'RADIANS','Syntax:\nRADIANS(X)\n\nReturns the argument X, converted from degrees to radians. (Note that\nπ radians equals 180 degrees.)\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html\n\n','mysql> SELECT RADIANS(90);\n -> 1.5707963267949\n','http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (499,15,'COLLATION','Syntax:\nCOLLATION(str)\n\nReturns the collation of the string argument.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/information-functions.html\n\n','mysql> SELECT COLLATION(\'abc\');\n -> \'latin1_swedish_ci\'\nmysql> SELECT COLLATION(_utf8\'abc\');\n -> \'utf8_general_ci\'\n','http://dev.mysql.com/doc/refman/5.1/en/information-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (500,17,'COALESCE','Syntax:\nCOALESCE(value,...)\n\nReturns the first non-NULL value in the list, or NULL if there are no\nnon-NULL values.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html\n\n','mysql> SELECT COALESCE(NULL,1);\n -> 1\nmysql> SELECT COALESCE(NULL,NULL,NULL);\n -> NULL\n','http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (501,15,'VERSION','Syntax:\nVERSION()\n\nReturns a string that indicates the MySQL server version. The string\nuses the utf8 character set.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/information-functions.html\n\n','mysql> SELECT VERSION();\n -> \'5.1.46-standard\'\n','http://dev.mysql.com/doc/refman/5.1/en/information-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (502,35,'MAKE_SET','Syntax:\nMAKE_SET(bits,str1,str2,...)\n\nReturns a set value (a string containing substrings separated by ","\ncharacters) consisting of the strings that have the corresponding bit\nin bits set. str1 corresponds to bit 0, str2 to bit 1, and so on. NULL\nvalues in str1, str2, ... are not appended to the result.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','mysql> SELECT MAKE_SET(1,\'a\',\'b\',\'c\');\n -> \'a\'\nmysql> SELECT MAKE_SET(1 | 4,\'hello\',\'nice\',\'world\');\n -> \'hello,world\'\nmysql> SELECT MAKE_SET(1 | 4,\'hello\',\'nice\',NULL,\'world\');\n -> \'hello\'\nmysql> SELECT MAKE_SET(0,\'a\',\'b\',\'c\');\n -> \'\'\n','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); -insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (503,35,'FIND_IN_SET','Syntax:\nFIND_IN_SET(str,strlist)\n\nReturns a value in the range of 1 to N if the string str is in the\nstring list strlist consisting of N substrings. A string list is a\nstring composed of substrings separated by "," characters. If the first\nargument is a constant string and the second is a column of type SET,\nthe FIND_IN_SET() function is optimized to use bit arithmetic. Returns\n0 if str is not in strlist or if strlist is the empty string. Returns\nNULL if either argument is NULL. This function does not work properly\nif the first argument contains a comma (",") character.\n\nURL: http://dev.mysql.com/doc/refman/5.1/en/string-functions.html\n\n','mysql> SELECT FIND_IN_SET(\'b\',\'a,b,c,d\');\n -> 2\n','http://dev.mysql.com/doc/refman/5.1/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (0,16,'MIN','Syntax:\nMIN([DISTINCT] expr)\n\nReturns the minimum value of expr. MIN() may take a string argument; in\nsuch cases, it returns the minimum string value. See\nhttp://dev.mysql.com/doc/refman/5.5/en/mysql-indexes.html. The DISTINCT\nkeyword can be used to find the minimum of the distinct values of expr,\nhowever, this produces the same result as omitting DISTINCT.\n\nMIN() returns NULL if there were no matching rows.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/group-by-functions.html\n\n','mysql> SELECT student_name, MIN(test_score), MAX(test_score)\n -> FROM student\n -> GROUP BY student_name;\n','http://dev.mysql.com/doc/refman/5.5/en/group-by-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (1,27,'JOIN','MySQL supports the following JOIN syntaxes for the table_references\npart of SELECT statements and multiple-table DELETE and UPDATE\nstatements:\n\ntable_references:\n table_reference [, table_reference] ...\n\ntable_reference:\n table_factor\n | join_table\n\ntable_factor:\n tbl_name [[AS] alias] [index_hint_list]\n | table_subquery [AS] alias\n | ( table_references )\n | { OJ table_reference LEFT OUTER JOIN table_reference\n ON conditional_expr }\n\njoin_table:\n table_reference [INNER | CROSS] JOIN table_factor [join_condition]\n | table_reference STRAIGHT_JOIN table_factor\n | table_reference STRAIGHT_JOIN table_factor ON conditional_expr\n | table_reference {LEFT|RIGHT} [OUTER] JOIN table_reference join_condition\n | table_reference NATURAL [{LEFT|RIGHT} [OUTER]] JOIN table_factor\n\njoin_condition:\n ON conditional_expr\n | USING (column_list)\n\nindex_hint_list:\n index_hint [, index_hint] ...\n\nindex_hint:\n USE {INDEX|KEY}\n [FOR {JOIN|ORDER BY|GROUP BY}] ([index_list])\n | IGNORE {INDEX|KEY}\n [FOR {JOIN|ORDER BY|GROUP BY}] (index_list)\n | FORCE {INDEX|KEY}\n [FOR {JOIN|ORDER BY|GROUP BY}] (index_list)\n\nindex_list:\n index_name [, index_name] ...\n\nA table reference is also known as a join expression.\n\nThe syntax of table_factor is extended in comparison with the SQL\nStandard. The latter accepts only table_reference, not a list of them\ninside a pair of parentheses.\n\nThis is a conservative extension if we consider each comma in a list of\ntable_reference items as equivalent to an inner join. For example:\n\nSELECT * FROM t1 LEFT JOIN (t2, t3, t4)\n ON (t2.a=t1.a AND t3.b=t1.b AND t4.c=t1.c)\n\nis equivalent to:\n\nSELECT * FROM t1 LEFT JOIN (t2 CROSS JOIN t3 CROSS JOIN t4)\n ON (t2.a=t1.a AND t3.b=t1.b AND t4.c=t1.c)\n\nIn MySQL, JOIN, CROSS JOIN, and INNER JOIN are syntactic equivalents\n(they can replace each other). In standard SQL, they are not\nequivalent. INNER JOIN is used with an ON clause, CROSS JOIN is used\notherwise.\n\nIn general, parentheses can be ignored in join expressions containing\nonly inner join operations. MySQL also supports nested joins (see\nhttp://dev.mysql.com/doc/refman/5.5/en/nested-join-optimization.html).\n\nIndex hints can be specified to affect how the MySQL optimizer makes\nuse of indexes. For more information, see\nhttp://dev.mysql.com/doc/refman/5.5/en/index-hints.html.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/join.html\n\n','SELECT left_tbl.*\n FROM left_tbl LEFT JOIN right_tbl ON left_tbl.id = right_tbl.id\n WHERE right_tbl.id IS NULL;\n','http://dev.mysql.com/doc/refman/5.5/en/join.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (2,37,'HEX','Syntax:\nHEX(str), HEX(N)\n\nFor a string argument str, HEX() returns a hexadecimal string\nrepresentation of str where each character in str is converted to two\nhexadecimal digits. The inverse of this operation is performed by the\nUNHEX() function.\n\nFor a numeric argument N, HEX() returns a hexadecimal string\nrepresentation of the value of N treated as a longlong (BIGINT) number.\nThis is equivalent to CONV(N,10,16). The inverse of this operation is\nperformed by CONV(HEX(N),16,10).\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','mysql> SELECT 0x616263, HEX(\'abc\'), UNHEX(HEX(\'abc\'));\n -> \'abc\', 616263, \'abc\'\nmysql> SELECT HEX(255), CONV(HEX(255),16,10);\n -> \'FF\', 255\n','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (3,27,'REPLACE','Syntax:\nREPLACE [LOW_PRIORITY | DELAYED]\n [INTO] tbl_name [(col_name,...)]\n {VALUES | VALUE} ({expr | DEFAULT},...),(...),...\n\nOr:\n\nREPLACE [LOW_PRIORITY | DELAYED]\n [INTO] tbl_name\n SET col_name={expr | DEFAULT}, ...\n\nOr:\n\nREPLACE [LOW_PRIORITY | DELAYED]\n [INTO] tbl_name [(col_name,...)]\n SELECT ...\n\nREPLACE works exactly like INSERT, except that if an old row in the\ntable has the same value as a new row for a PRIMARY KEY or a UNIQUE\nindex, the old row is deleted before the new row is inserted. See [HELP\nINSERT].\n\nREPLACE is a MySQL extension to the SQL standard. It either inserts, or\ndeletes and inserts. For another MySQL extension to standard SQL---that\neither inserts or updates---see\nhttp://dev.mysql.com/doc/refman/5.5/en/insert-on-duplicate.html.\n\nNote that unless the table has a PRIMARY KEY or UNIQUE index, using a\nREPLACE statement makes no sense. It becomes equivalent to INSERT,\nbecause there is no index to be used to determine whether a new row\nduplicates another.\n\nValues for all columns are taken from the values specified in the\nREPLACE statement. Any missing columns are set to their default values,\njust as happens for INSERT. You cannot refer to values from the current\nrow and use them in the new row. If you use an assignment such as SET\ncol_name = col_name + 1, the reference to the column name on the right\nhand side is treated as DEFAULT(col_name), so the assignment is\nequivalent to SET col_name = DEFAULT(col_name) + 1.\n\nTo use REPLACE, you must have both the INSERT and DELETE privileges for\nthe table.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/replace.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/replace.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (4,30,'CONTAINS','Contains(g1,g2)\n\nReturns 1 or 0 to indicate whether g1 completely contains g2. This\ntests the opposite relationship as Within().\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/functions-for-testing-spatial-relations-between-geometric-objects.html#functions-that-test-spatial-relationships-between-geometries\n\n','','http://dev.mysql.com/doc/refman/5.5/en/functions-for-testing-spatial-relations-between-geometric-objects.html#functions-that-test-spatial-relationships-between-geometries'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (5,36,'SRID','SRID(g)\n\nReturns an integer indicating the Spatial Reference System ID for the\ngeometry value g.\n\nIn MySQL, the SRID value is just an integer associated with the\ngeometry value. All calculations are done assuming Euclidean (planar)\ngeometry.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#general-geometry-property-functions\n\n','mysql> SELECT SRID(GeomFromText(\'LineString(1 1,2 2)\',101));\n+-----------------------------------------------+\n| SRID(GeomFromText(\'LineString(1 1,2 2)\',101)) |\n+-----------------------------------------------+\n| 101 |\n+-----------------------------------------------+\n','http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#general-geometry-property-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (6,31,'CURRENT_TIMESTAMP','Syntax:\nCURRENT_TIMESTAMP, CURRENT_TIMESTAMP()\n\nCURRENT_TIMESTAMP and CURRENT_TIMESTAMP() are synonyms for NOW().\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (7,26,'SHOW CONTRIBUTORS','Syntax:\nSHOW CONTRIBUTORS\n\nThe SHOW CONTRIBUTORS statement displays information about the people\nwho contribute to MySQL source or to causes that we support. For each\ncontributor, it displays Name, Location, and Comment values.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-contributors.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/show-contributors.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (8,16,'VARIANCE','Syntax:\nVARIANCE(expr)\n\nReturns the population standard variance of expr. This is an extension\nto standard SQL. The standard SQL function VAR_POP() can be used\ninstead.\n\nVARIANCE() returns NULL if there were no matching rows.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/group-by-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/group-by-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (9,39,'DROP SERVER','Syntax:\nDROP SERVER [ IF EXISTS ] server_name\n\nDrops the server definition for the server named server_name. The\ncorresponding row within the mysql.servers table will be deleted. This\nstatement requires the SUPER privilege.\n\nDropping a server for a table does not affect any FEDERATED tables that\nused this connection information when they were created. See [HELP\nCREATE SERVER].\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/drop-server.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/drop-server.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (10,26,'SHOW AUTHORS','Syntax:\nSHOW AUTHORS\n\nThe SHOW AUTHORS statement displays information about the people who\nwork on MySQL. For each author, it displays Name, Location, and Comment\nvalues.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-authors.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/show-authors.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (11,16,'VAR_SAMP','Syntax:\nVAR_SAMP(expr)\n\nReturns the sample variance of expr. That is, the denominator is the\nnumber of rows minus one.\n\nVAR_SAMP() returns NULL if there were no matching rows.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/group-by-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/group-by-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (12,37,'CONCAT','Syntax:\nCONCAT(str1,str2,...)\n\nReturns the string that results from concatenating the arguments. May\nhave one or more arguments. If all arguments are nonbinary strings, the\nresult is a nonbinary string. If the arguments include any binary\nstrings, the result is a binary string. A numeric argument is converted\nto its equivalent string form. This is a nonbinary string as of MySQL\n5.5.3. Before 5.5.3, it is a binary string; to to avoid that and\nproduce a nonbinary string, you can use an explicit type cast, as in\nthis example:\n\nSELECT CONCAT(CAST(int_col AS CHAR), char_col);\n\nCONCAT() returns NULL if any argument is NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','mysql> SELECT CONCAT(\'My\', \'S\', \'QL\');\n -> \'MySQL\'\nmysql> SELECT CONCAT(\'My\', NULL, \'QL\');\n -> NULL\nmysql> SELECT CONCAT(14.3);\n -> \'14.3\'\n','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (13,34,'GEOMETRY HIERARCHY','Geometry is the base class. It is an abstract class. The instantiable\nsubclasses of Geometry are restricted to zero-, one-, and\ntwo-dimensional geometric objects that exist in two-dimensional\ncoordinate space. All instantiable geometry classes are defined so that\nvalid instances of a geometry class are topologically closed (that is,\nall defined geometries include their boundary).\n\nThe base Geometry class has subclasses for Point, Curve, Surface, and\nGeometryCollection:\n\no Point represents zero-dimensional objects.\n\no Curve represents one-dimensional objects, and has subclass\n LineString, with sub-subclasses Line and LinearRing.\n\no Surface is designed for two-dimensional objects and has subclass\n Polygon.\n\no GeometryCollection has specialized zero-, one-, and two-dimensional\n collection classes named MultiPoint, MultiLineString, and\n MultiPolygon for modeling geometries corresponding to collections of\n Points, LineStrings, and Polygons, respectively. MultiCurve and\n MultiSurface are introduced as abstract superclasses that generalize\n the collection interfaces to handle Curves and Surfaces.\n\nGeometry, Curve, Surface, MultiCurve, and MultiSurface are defined as\nnoninstantiable classes. They define a common set of methods for their\nsubclasses and are included for extensibility.\n\nPoint, LineString, Polygon, GeometryCollection, MultiPoint,\nMultiLineString, and MultiPolygon are instantiable classes.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/gis-geometry-class-hierarchy.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/gis-geometry-class-hierarchy.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (14,37,'CHAR FUNCTION','Syntax:\nCHAR(N,... [USING charset_name])\n\nCHAR() interprets each argument N as an integer and returns a string\nconsisting of the characters given by the code values of those\nintegers. NULL values are skipped.\nBy default, CHAR() returns a binary string. To produce a string in a\ngiven character set, use the optional USING clause:\n\nmysql> SELECT CHARSET(CHAR(0x65)), CHARSET(CHAR(0x65 USING utf8));\n+---------------------+--------------------------------+\n| CHARSET(CHAR(0x65)) | CHARSET(CHAR(0x65 USING utf8)) |\n+---------------------+--------------------------------+\n| binary | utf8 |\n+---------------------+--------------------------------+\n\nIf USING is given and the result string is illegal for the given\ncharacter set, a warning is issued. Also, if strict SQL mode is\nenabled, the result from CHAR() becomes NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','mysql> SELECT CHAR(77,121,83,81,\'76\');\n -> \'MySQL\'\nmysql> SELECT CHAR(77,77.3,\'77.3\');\n -> \'MMM\'\n','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (15,22,'DATETIME','DATETIME\n\nA date and time combination. The supported range is \'1000-01-01\n00:00:00\' to \'9999-12-31 23:59:59\'. MySQL displays DATETIME values in\n\'YYYY-MM-DD HH:MM:SS\' format, but permits assignment of values to\nDATETIME columns using either strings or numbers.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-type-overview.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (16,26,'SHOW CREATE TRIGGER','Syntax:\nSHOW CREATE TRIGGER trigger_name\n\nThis statement shows a CREATE TRIGGER statement that creates the given\ntrigger.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-create-trigger.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/show-create-trigger.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (17,26,'SHOW CREATE PROCEDURE','Syntax:\nSHOW CREATE PROCEDURE proc_name\n\nThis statement is a MySQL extension. It returns the exact string that\ncan be used to re-create the named stored procedure. A similar\nstatement, SHOW CREATE FUNCTION, displays information about stored\nfunctions (see [HELP SHOW CREATE FUNCTION]).\n\nBoth statements require that you be the owner of the routine or have\nSELECT access to the mysql.proc table. If you do not have privileges\nfor the routine itself, the value displayed for the Create Procedure or\nCreate Function field will be NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-create-procedure.html\n\n','mysql> SHOW CREATE PROCEDURE test.simpleproc\\G\n*************************** 1. row ***************************\n Procedure: simpleproc\n sql_mode:\n Create Procedure: CREATE PROCEDURE `simpleproc`(OUT param1 INT)\n BEGIN\n SELECT COUNT(*) INTO param1 FROM t;\n END\ncharacter_set_client: latin1\ncollation_connection: latin1_swedish_ci\n Database Collation: latin1_swedish_ci\n\nmysql> SHOW CREATE FUNCTION test.hello\\G\n*************************** 1. row ***************************\n Function: hello\n sql_mode:\n Create Function: CREATE FUNCTION `hello`(s CHAR(20))\n RETURNS CHAR(50)\n RETURN CONCAT(\'Hello, \',s,\'!\')\ncharacter_set_client: latin1\ncollation_connection: latin1_swedish_ci\n Database Collation: latin1_swedish_ci\n','http://dev.mysql.com/doc/refman/5.5/en/show-create-procedure.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (18,23,'OPEN','Syntax:\nOPEN cursor_name\n\nThis statement opens a previously declared cursor. For an example, see\nhttp://dev.mysql.com/doc/refman/5.5/en/cursors.html.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/open.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/open.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (19,22,'INTEGER','INTEGER[(M)] [UNSIGNED] [ZEROFILL]\n\nThis type is a synonym for INT.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/numeric-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/numeric-type-overview.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (20,37,'LOWER','Syntax:\nLOWER(str)\n\nReturns the string str with all characters changed to lowercase\naccording to the current character set mapping. The default is latin1\n(cp1252 West European).\n\nmysql> SELECT LOWER(\'QUADRATICALLY\');\n -> \'quadratically\'\n\nLOWER() (and UPPER()) are ineffective when applied to binary strings\n(BINARY, VARBINARY, BLOB). To perform lettercase conversion, convert\nthe string to a nonbinary string:\n\nmysql> SET @str = BINARY \'New York\';\nmysql> SELECT LOWER(@str), LOWER(CONVERT(@str USING latin1));\n+-------------+-----------------------------------+\n| LOWER(@str) | LOWER(CONVERT(@str USING latin1)) |\n+-------------+-----------------------------------+\n| New York | new york |\n+-------------+-----------------------------------+\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (21,26,'SHOW COLUMNS','Syntax:\nSHOW [FULL] COLUMNS {FROM | IN} tbl_name [{FROM | IN} db_name]\n [LIKE \'pattern\' | WHERE expr]\n\nSHOW COLUMNS displays information about the columns in a given table.\nIt also works for views. The LIKE clause, if present, indicates which\ncolumn names to match. The WHERE clause can be given to select rows\nusing more general conditions, as discussed in\nhttp://dev.mysql.com/doc/refman/5.5/en/extended-show.html.\n\nSHOW COLUMNS displays information only for those columns for which you\nhave some privilege.\n\nmysql> SHOW COLUMNS FROM City;\n+------------+----------+------+-----+---------+----------------+\n| Field | Type | Null | Key | Default | Extra |\n+------------+----------+------+-----+---------+----------------+\n| Id | int(11) | NO | PRI | NULL | auto_increment |\n| Name | char(35) | NO | | | |\n| Country | char(3) | NO | UNI | | |\n| District | char(20) | YES | MUL | | |\n| Population | int(11) | NO | | 0 | |\n+------------+----------+------+-----+---------+----------------+\n5 rows in set (0.00 sec)\n\nIf the data types differ from what you expect them to be based on a\nCREATE TABLE statement, note that MySQL sometimes changes data types\nwhen you create or alter a table. The conditions under which this\noccurs are described in\nhttp://dev.mysql.com/doc/refman/5.5/en/silent-column-changes.html.\n\nThe FULL keyword causes the output to include the column collation and\ncomments, as well as the privileges you have for each column.\n\nYou can use db_name.tbl_name as an alternative to the tbl_name FROM\ndb_name syntax. In other words, these two statements are equivalent:\n\nmysql> SHOW COLUMNS FROM mytable FROM mydb;\nmysql> SHOW COLUMNS FROM mydb.mytable;\n\nSHOW COLUMNS displays the following values for each table column:\n\nField indicates the column name.\n\nType indicates the column data type.\n\nCollation indicates the collation for nonbinary string columns, or NULL\nfor other columns. This value is displayed only if you use the FULL\nkeyword.\n\nThe Null field contains YES if NULL values can be stored in the column,\nNO if not.\n\nThe Key field indicates whether the column is indexed:\n\no If Key is empty, the column either is not indexed or is indexed only\n as a secondary column in a multiple-column, nonunique index.\n\no If Key is PRI, the column is a PRIMARY KEY or is one of the columns\n in a multiple-column PRIMARY KEY.\n\no If Key is UNI, the column is the first column of a UNIQUE index. (A\n UNIQUE index permits multiple NULL values, but you can tell whether\n the column permits NULL by checking the Null field.)\n\no If Key is MUL, the column is the first column of a nonunique index in\n which multiple occurrences of a given value are permitted within the\n column.\n\nIf more than one of the Key values applies to a given column of a\ntable, Key displays the one with the highest priority, in the order\nPRI, UNI, MUL.\n\nA UNIQUE index may be displayed as PRI if it cannot contain NULL values\nand there is no PRIMARY KEY in the table. A UNIQUE index may display as\nMUL if several columns form a composite UNIQUE index; although the\ncombination of the columns is unique, each column can still hold\nmultiple occurrences of a given value.\n\nThe Default field indicates the default value that is assigned to the\ncolumn. This is NULL if the column has an explicit default of NULL, or\nif the column definition has no DEFAULT clause.\n\nThe Extra field contains any additional information that is available\nabout a given column. The value is nonempty in these cases:\nauto_increment for columns that have the AUTO_INCREMENT attribute; on\nupdate CURRENT_TIMESTAMP for TIMESTAMP columns that have the ON UPDATE\nCURRENT_TIMESTAMP attribute.\n\nPrivileges indicates the privileges you have for the column. This value\nis displayed only if you use the FULL keyword.\n\nComment indicates any comment the column has. This value is displayed\nonly if you use the FULL keyword.\n\nSHOW FIELDS is a synonym for SHOW COLUMNS. You can also list a table\'s\ncolumns with the mysqlshow db_name tbl_name command.\n\nThe DESCRIBE statement provides information similar to SHOW COLUMNS.\nSee [HELP DESCRIBE].\n\nThe SHOW CREATE TABLE, SHOW TABLE STATUS, and SHOW INDEX statements\nalso provide information about tables. See [HELP SHOW].\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-columns.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/show-columns.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (22,39,'CREATE TRIGGER','Syntax:\nCREATE\n [DEFINER = { user | CURRENT_USER }]\n TRIGGER trigger_name trigger_time trigger_event\n ON tbl_name FOR EACH ROW trigger_body\n\nThis statement creates a new trigger. A trigger is a named database\nobject that is associated with a table, and that activates when a\nparticular event occurs for the table. The trigger becomes associated\nwith the table named tbl_name, which must refer to a permanent table.\nYou cannot associate a trigger with a TEMPORARY table or a view.\n\nCREATE TRIGGER requires the TRIGGER privilege for the table associated\nwith the trigger. The statement might also require the SUPER privilege,\ndepending on the DEFINER value, as described later in this section. If\nbinary logging is enabled, CREATE TRIGGER might require the SUPER\nprivilege, as described in\nhttp://dev.mysql.com/doc/refman/5.5/en/stored-programs-logging.html.\n\nThe DEFINER clause determines the security context to be used when\nchecking access privileges at trigger activation time. See later in\nthis section for more information.\n\ntrigger_time is the trigger action time. It can be BEFORE or AFTER to\nindicate that the trigger activates before or after each row to be\nmodified.\n\ntrigger_event indicates the kind of statement that activates the\ntrigger. The trigger_event can be one of the following:\n\no INSERT: The trigger is activated whenever a new row is inserted into\n the table; for example, through INSERT, LOAD DATA, and REPLACE\n statements.\n\no UPDATE: The trigger is activated whenever a row is modified; for\n example, through UPDATE statements.\n\no DELETE: The trigger is activated whenever a row is deleted from the\n table; for example, through DELETE and REPLACE statements. However,\n DROP TABLE and TRUNCATE TABLE statements on the table do not activate\n this trigger, because they do not use DELETE. Dropping a partition\n does not activate DELETE triggers, either. See [HELP TRUNCATE TABLE].\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/create-trigger.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/create-trigger.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (23,31,'MONTH','Syntax:\nMONTH(date)\n\nReturns the month for date, in the range 1 to 12 for January to\nDecember, or 0 for dates such as \'0000-00-00\' or \'2008-00-00\' that have\na zero month part.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT MONTH(\'2008-02-03\');\n -> 2\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (24,22,'TINYINT','TINYINT[(M)] [UNSIGNED] [ZEROFILL]\n\nA very small integer. The signed range is -128 to 127. The unsigned\nrange is 0 to 255.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/numeric-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/numeric-type-overview.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (25,26,'SHOW TRIGGERS','Syntax:\nSHOW TRIGGERS [{FROM | IN} db_name]\n [LIKE \'pattern\' | WHERE expr]\n\nSHOW TRIGGERS lists the triggers currently defined for tables in a\ndatabase (the default database unless a FROM clause is given). This\nstatement returns results only for databases and tables for which you\nhave the TRIGGER privilege. The LIKE clause, if present, indicates\nwhich table names to match and causes the statement to display triggers\nfor those tables. The WHERE clause can be given to select rows using\nmore general conditions, as discussed in\nhttp://dev.mysql.com/doc/refman/5.5/en/extended-show.html.\n\nFor the trigger ins_sum as defined in\nhttp://dev.mysql.com/doc/refman/5.5/en/triggers.html, the output of\nthis statement is as shown here:\n\nmysql> SHOW TRIGGERS LIKE \'acc%\'\\G\n*************************** 1. row ***************************\n Trigger: ins_sum\n Event: INSERT\n Table: account\n Statement: SET @sum = @sum + NEW.amount\n Timing: BEFORE\n Created: NULL\n sql_mode:\n Definer: myname@localhost\ncharacter_set_client: latin1\ncollation_connection: latin1_swedish_ci\n Database Collation: latin1_swedish_ci\n\ncharacter_set_client is the session value of the character_set_client\nsystem variable when the trigger was created. collation_connection is\nthe session value of the collation_connection system variable when the\ntrigger was created. Database Collation is the collation of the\ndatabase with which the trigger is associated.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-triggers.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/show-triggers.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (26,14,'MASTER_POS_WAIT','Syntax:\nMASTER_POS_WAIT(log_name,log_pos[,timeout])\n\nThis function is useful for control of master/slave synchronization. It\nblocks until the slave has read and applied all updates up to the\nspecified position in the master log. The return value is the number of\nlog events the slave had to wait for to advance to the specified\nposition. The function returns NULL if the slave SQL thread is not\nstarted, the slave\'s master information is not initialized, the\narguments are incorrect, or an error occurs. It returns -1 if the\ntimeout has been exceeded. If the slave SQL thread stops while\nMASTER_POS_WAIT() is waiting, the function returns NULL. If the slave\nis past the specified position, the function returns immediately.\n\nIf a timeout value is specified, MASTER_POS_WAIT() stops waiting when\ntimeout seconds have elapsed. timeout must be greater than 0; a zero or\nnegative timeout means no timeout.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/miscellaneous-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/miscellaneous-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (27,37,'REGEXP','Syntax:\nexpr REGEXP pat, expr RLIKE pat\n\nPerforms a pattern match of a string expression expr against a pattern\npat. The pattern can be an extended regular expression. The syntax for\nregular expressions is discussed in\nhttp://dev.mysql.com/doc/refman/5.5/en/regexp.html. Returns 1 if expr\nmatches pat; otherwise it returns 0. If either expr or pat is NULL, the\nresult is NULL. RLIKE is a synonym for REGEXP, provided for mSQL\ncompatibility.\n\nThe pattern need not be a literal string. For example, it can be\nspecified as a string expression or table column.\n\n*Note*: Because MySQL uses the C escape syntax in strings (for example,\n"\\n" to represent the newline character), you must double any "\\" that\nyou use in your REGEXP strings.\n\nREGEXP is not case sensitive, except when used with binary strings.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/regexp.html\n\n','mysql> SELECT \'Monty!\' REGEXP \'.*\';\n -> 1\nmysql> SELECT \'new*\\n*line\' REGEXP \'new\\\\*.\\\\*line\';\n -> 1\nmysql> SELECT \'a\' REGEXP \'A\', \'a\' REGEXP BINARY \'A\';\n -> 1 0\nmysql> SELECT \'a\' REGEXP \'^[a-d]\';\n -> 1\n','http://dev.mysql.com/doc/refman/5.5/en/regexp.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (28,23,'IF STATEMENT','Syntax:\nIF search_condition THEN statement_list\n [ELSEIF search_condition THEN statement_list] ...\n [ELSE statement_list]\nEND IF\n\nThe IF statement for stored programs implements a basic conditional\nconstruct.\n\n*Note*: There is also an IF() function, which differs from the IF\nstatement described here. See\nhttp://dev.mysql.com/doc/refman/5.5/en/control-flow-functions.html. The\nIF statement can have THEN, ELSE, and ELSEIF clauses, and it is\nterminated with END IF.\n\nIf the search_condition evaluates to true, the corresponding THEN or\nELSEIF clause statement_list executes. If no search_condition matches,\nthe ELSE clause statement_list executes.\n\nEach statement_list consists of one or more SQL statements; an empty\nstatement_list is not permitted.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/if.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/if.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (29,19,'^','Syntax:\n^\n\nBitwise XOR:\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/bit-functions.html\n\n','mysql> SELECT 1 ^ 1;\n -> 0\nmysql> SELECT 1 ^ 0;\n -> 1\nmysql> SELECT 11 ^ 3;\n -> 8\n','http://dev.mysql.com/doc/refman/5.5/en/bit-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (30,39,'DROP VIEW','Syntax:\nDROP VIEW [IF EXISTS]\n view_name [, view_name] ...\n [RESTRICT | CASCADE]\n\nDROP VIEW removes one or more views. You must have the DROP privilege\nfor each view. If any of the views named in the argument list do not\nexist, MySQL returns an error indicating by name which nonexisting\nviews it was unable to drop, but it also drops all of the views in the\nlist that do exist.\n\nThe IF EXISTS clause prevents an error from occurring for views that\ndon\'t exist. When this clause is given, a NOTE is generated for each\nnonexistent view. See [HELP SHOW WARNINGS].\n\nRESTRICT and CASCADE, if given, are parsed and ignored.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/drop-view.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/drop-view.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (31,30,'WITHIN','Within(g1,g2)\n\nReturns 1 or 0 to indicate whether g1 is spatially within g2. This\ntests the opposite relationship as Contains().\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/functions-for-testing-spatial-relations-between-geometric-objects.html#functions-that-test-spatial-relationships-between-geometries\n\n','','http://dev.mysql.com/doc/refman/5.5/en/functions-for-testing-spatial-relations-between-geometric-objects.html#functions-that-test-spatial-relationships-between-geometries'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (32,31,'WEEK','Syntax:\nWEEK(date[,mode])\n\nThis function returns the week number for date. The two-argument form\nof WEEK() enables you to specify whether the week starts on Sunday or\nMonday and whether the return value should be in the range from 0 to 53\nor from 1 to 53. If the mode argument is omitted, the value of the\ndefault_week_format system variable is used. See\nhttp://dev.mysql.com/doc/refman/5.5/en/server-system-variables.html.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT WEEK(\'2008-02-20\');\n -> 7\nmysql> SELECT WEEK(\'2008-02-20\',0);\n -> 7\nmysql> SELECT WEEK(\'2008-02-20\',1);\n -> 8\nmysql> SELECT WEEK(\'2008-12-31\',1);\n -> 53\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (33,26,'SHOW PLUGINS','Syntax:\nSHOW PLUGINS\n\nSHOW PLUGINS displays information about server plugins. Plugin\ninformation is also available in the INFORMATION_SCHEMA.PLUGINS table.\nSee http://dev.mysql.com/doc/refman/5.5/en/plugins-table.html.\n\nExample of SHOW PLUGINS output:\n\nmysql> SHOW PLUGINS\\G\n*************************** 1. row ***************************\n Name: binlog\n Status: ACTIVE\n Type: STORAGE ENGINE\nLibrary: NULL\nLicense: GPL\n*************************** 2. row ***************************\n Name: CSV\n Status: ACTIVE\n Type: STORAGE ENGINE\nLibrary: NULL\nLicense: GPL\n*************************** 3. row ***************************\n Name: MEMORY\n Status: ACTIVE\n Type: STORAGE ENGINE\nLibrary: NULL\nLicense: GPL\n*************************** 4. row ***************************\n Name: MyISAM\n Status: ACTIVE\n Type: STORAGE ENGINE\nLibrary: NULL\nLicense: GPL\n...\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-plugins.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/show-plugins.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (34,21,'DROP FUNCTION UDF','Syntax:\nDROP FUNCTION function_name\n\nThis statement drops the user-defined function (UDF) named\nfunction_name.\n\nTo drop a function, you must have the DELETE privilege for the mysql\ndatabase. This is because DROP FUNCTION removes a row from the\nmysql.func system table that records the function\'s name, type, and\nshared library name.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/drop-function-udf.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/drop-function-udf.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (35,8,'PREPARE','Syntax:\nPREPARE stmt_name FROM preparable_stmt\n\nThe PREPARE statement prepares a statement and assigns it a name,\nstmt_name, by which to refer to the statement later. Statement names\nare not case sensitive. preparable_stmt is either a string literal or a\nuser variable that contains the text of the statement. The text must\nrepresent a single SQL statement, not multiple statements. Within the\nstatement, "?" characters can be used as parameter markers to indicate\nwhere data values are to be bound to the query later when you execute\nit. The "?" characters should not be enclosed within quotation marks,\neven if you intend to bind them to string values. Parameter markers can\nbe used only where data values should appear, not for SQL keywords,\nidentifiers, and so forth.\n\nIf a prepared statement with the given name already exists, it is\ndeallocated implicitly before the new statement is prepared. This means\nthat if the new statement contains an error and cannot be prepared, an\nerror is returned and no statement with the given name exists.\n\nA prepared statement is executed with EXECUTE and released with\nDEALLOCATE PREPARE.\n\nThe scope of a prepared statement is the session within which it is\ncreated. Other sessions cannot see it.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/prepare.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/prepare.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (36,8,'LOCK','Syntax:\nLOCK TABLES\n tbl_name [[AS] alias] lock_type\n [, tbl_name [[AS] alias] lock_type] ...\n\nlock_type:\n READ [LOCAL]\n | [LOW_PRIORITY] WRITE\n\nUNLOCK TABLES\n\nMySQL enables client sessions to acquire table locks explicitly for the\npurpose of cooperating with other sessions for access to tables, or to\nprevent other sessions from modifying tables during periods when a\nsession requires exclusive access to them. A session can acquire or\nrelease locks only for itself. One session cannot acquire locks for\nanother session or release locks held by another session.\n\nLocks may be used to emulate transactions or to get more speed when\nupdating tables. This is explained in more detail later in this\nsection.\n\nLOCK TABLES explicitly acquires table locks for the current client\nsession. Table locks can be acquired for base tables or views. You must\nhave the LOCK TABLES privilege, and the SELECT privilege for each\nobject to be locked.\n\nFor view locking, LOCK TABLES adds all base tables used in the view to\nthe set of tables to be locked and locks them automatically. If you\nlock a table explicitly with LOCK TABLES, any tables used in triggers\nare also locked implicitly, as described in\nhttp://dev.mysql.com/doc/refman/5.5/en/lock-tables-and-triggers.html.\n\nUNLOCK TABLES explicitly releases any table locks held by the current\nsession. LOCK TABLES implicitly releases any table locks held by the\ncurrent session before acquiring new locks.\n\nAnother use for UNLOCK TABLES is to release the global read lock\nacquired with the FLUSH TABLES WITH READ LOCK statement, which enables\nyou to lock all tables in all databases. See [HELP FLUSH]. (This is a\nvery convenient way to get backups if you have a file system such as\nVeritas that can take snapshots in time.)\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/lock-tables.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/lock-tables.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (37,37,'UPDATEXML','Syntax:\nUpdateXML(xml_target, xpath_expr, new_xml)\n\nThis function replaces a single portion of a given fragment of XML\nmarkup xml_target with a new XML fragment new_xml, and then returns the\nchanged XML. The portion of xml_target that is replaced matches an\nXPath expression xpath_expr supplied by the user. In MySQL 5.5, the\nXPath expression can contain at most 127 characters. (This limitation\nis lifted in MySQL 5.6.)\n\nIf no expression matching xpath_expr is found, or if multiple matches\nare found, the function returns the original xml_target XML fragment.\nAll three arguments should be strings.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/xml-functions.html\n\n','mysql> SELECT\n -> UpdateXML(\'ccc\', \'/a\', \'fff\') AS val1,\n -> UpdateXML(\'ccc\', \'/b\', \'fff\') AS val2,\n -> UpdateXML(\'ccc\', \'//b\', \'fff\') AS val3,\n -> UpdateXML(\'ccc\', \'/a/d\', \'fff\') AS val4,\n -> UpdateXML(\'ccc\', \'/a/d\', \'fff\') AS val5\n -> \\G\n\n*************************** 1. row ***************************\nval1: fff\nval2: ccc\nval3: fff\nval4: cccfff\nval5: ccc\n','http://dev.mysql.com/doc/refman/5.5/en/xml-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (38,8,'RESET SLAVE','Syntax:\nRESET SLAVE [ALL]\n\nRESET SLAVE makes the slave forget its replication position in the\nmaster\'s binary log. This statement is meant to be used for a clean\nstart: It deletes the master.info and relay-log.info files, all the\nrelay log files, and starts a new relay log file. To use RESET SLAVE,\nthe slave replication threads must be stopped (use STOP SLAVE if\nnecessary).\n\n*Note*: All relay log files are deleted, even if they have not been\ncompletely executed by the slave SQL thread. (This is a condition\nlikely to exist on a replication slave if you have issued a STOP SLAVE\nstatement or if the slave is highly loaded.)\n\nIn MySQL 5.5 (unlike the case in MySQL 5.1 and earlier), RESET SLAVE\ndoes not change any replication connection parameters such as master\nhost, master port, master user, or master password, which are retained\nin memory. This means that START SLAVE can be issued without requiring\na CHANGE MASTER TO statement following RESET SLAVE.\n\nIn MySQL 5.5.16 and later, you can use RESET SLAVE ALL to reset these\nconnection parameters (Bug #11809016). Connection parameters are also\nreset if the slave mysqld is shut down.\n\nIf the slave SQL thread was in the middle of replicating temporary\ntables when it was stopped, and RESET SLAVE is issued, these replicated\ntemporary tables are deleted on the slave.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/reset-slave.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/reset-slave.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (39,26,'SHOW BINARY LOGS','Syntax:\nSHOW BINARY LOGS\nSHOW MASTER LOGS\n\nLists the binary log files on the server. This statement is used as\npart of the procedure described in [HELP PURGE BINARY LOGS], that shows\nhow to determine which logs can be purged.\n\nmysql> SHOW BINARY LOGS;\n+---------------+-----------+\n| Log_name | File_size |\n+---------------+-----------+\n| binlog.000015 | 724935 |\n| binlog.000016 | 733481 |\n+---------------+-----------+\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-binary-logs.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/show-binary-logs.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (40,24,'POLYGON','Polygon(ls1,ls2,...)\n\nConstructs a Polygon value from a number of LineString or WKB\nLineString arguments. If any argument does not represent a LinearRing\n(that is, not a closed and simple LineString), the return value is\nNULL.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-mysql-specific-functions\n\n','','http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-mysql-specific-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (41,31,'MINUTE','Syntax:\nMINUTE(time)\n\nReturns the minute for time, in the range 0 to 59.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT MINUTE(\'2008-02-03 10:05:03\');\n -> 5\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (42,31,'DAY','Syntax:\nDAY(date)\n\nDAY() is a synonym for DAYOFMONTH().\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (43,37,'MID','Syntax:\nMID(str,pos,len)\n\nMID(str,pos,len) is a synonym for SUBSTRING(str,pos,len).\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (44,14,'UUID','Syntax:\nUUID()\n\nReturns a Universal Unique Identifier (UUID) generated according to\n"DCE 1.1: Remote Procedure Call" (Appendix A) CAE (Common Applications\nEnvironment) Specifications published by The Open Group in October 1997\n(Document Number C706,\nhttp://www.opengroup.org/public/pubs/catalog/c706.htm).\n\nA UUID is designed as a number that is globally unique in space and\ntime. Two calls to UUID() are expected to generate two different\nvalues, even if these calls are performed on two separate computers\nthat are not connected to each other.\n\nA UUID is a 128-bit number represented by a utf8 string of five\nhexadecimal numbers in aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee format:\n\no The first three numbers are generated from a timestamp.\n\no The fourth number preserves temporal uniqueness in case the timestamp\n value loses monotonicity (for example, due to daylight saving time).\n\no The fifth number is an IEEE 802 node number that provides spatial\n uniqueness. A random number is substituted if the latter is not\n available (for example, because the host computer has no Ethernet\n card, or we do not know how to find the hardware address of an\n interface on your operating system). In this case, spatial uniqueness\n cannot be guaranteed. Nevertheless, a collision should have very low\n probability.\n\n Currently, the MAC address of an interface is taken into account only\n on FreeBSD and Linux. On other operating systems, MySQL uses a\n randomly generated 48-bit number.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/miscellaneous-functions.html\n\n','mysql> SELECT UUID();\n -> \'6ccd780c-baba-1026-9564-0040f4311e29\'\n','http://dev.mysql.com/doc/refman/5.5/en/miscellaneous-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (45,24,'LINESTRING','LineString(pt1,pt2,...)\n\nConstructs a LineString value from a number of Point or WKB Point\narguments. If the number of arguments is less than two, the return\nvalue is NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-mysql-specific-functions\n\n','','http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-mysql-specific-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (46,14,'SLEEP','Syntax:\nSLEEP(duration)\n\nSleeps (pauses) for the number of seconds given by the duration\nargument, then returns 0. If SLEEP() is interrupted, it returns 1. The\nduration may have a fractional part given in microseconds.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/miscellaneous-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/miscellaneous-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (47,17,'CONNECTION_ID','Syntax:\nCONNECTION_ID()\n\nReturns the connection ID (thread ID) for the connection. Every\nconnection has an ID that is unique among the set of currently\nconnected clients.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/information-functions.html\n\n','mysql> SELECT CONNECTION_ID();\n -> 23786\n','http://dev.mysql.com/doc/refman/5.5/en/information-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (48,27,'DELETE','Syntax:\nSingle-table syntax:\n\nDELETE [LOW_PRIORITY] [QUICK] [IGNORE] FROM tbl_name\n [WHERE where_condition]\n [ORDER BY ...]\n [LIMIT row_count]\n\nMultiple-table syntax:\n\nDELETE [LOW_PRIORITY] [QUICK] [IGNORE]\n tbl_name[.*] [, tbl_name[.*]] ...\n FROM table_references\n [WHERE where_condition]\n\nOr:\n\nDELETE [LOW_PRIORITY] [QUICK] [IGNORE]\n FROM tbl_name[.*] [, tbl_name[.*]] ...\n USING table_references\n [WHERE where_condition]\n\nFor the single-table syntax, the DELETE statement deletes rows from\ntbl_name and returns a count of the number of deleted rows. This count\ncan be obtained by calling the ROW_COUNT() function (see\nhttp://dev.mysql.com/doc/refman/5.5/en/information-functions.html). The\nWHERE clause, if given, specifies the conditions that identify which\nrows to delete. With no WHERE clause, all rows are deleted. If the\nORDER BY clause is specified, the rows are deleted in the order that is\nspecified. The LIMIT clause places a limit on the number of rows that\ncan be deleted.\n\nFor the multiple-table syntax, DELETE deletes from each tbl_name the\nrows that satisfy the conditions. In this case, ORDER BY and LIMIT\ncannot be used.\n\nwhere_condition is an expression that evaluates to true for each row to\nbe deleted. It is specified as described in\nhttp://dev.mysql.com/doc/refman/5.5/en/select.html.\n\nCurrently, you cannot delete from a table and select from the same\ntable in a subquery.\n\nYou need the DELETE privilege on a table to delete rows from it. You\nneed only the SELECT privilege for any columns that are only read, such\nas those named in the WHERE clause.\n\nAs stated, a DELETE statement with no WHERE clause deletes all rows. A\nfaster way to do this, when you do not need to know the number of\ndeleted rows, is to use TRUNCATE TABLE. However, within a transaction\nor if you have a lock on the table, TRUNCATE TABLE cannot be used\nwhereas DELETE can. See [HELP TRUNCATE TABLE], and [HELP LOCK].\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/delete.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/delete.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (49,4,'ROUND','Syntax:\nROUND(X), ROUND(X,D)\n\nRounds the argument X to D decimal places. The rounding algorithm\ndepends on the data type of X. D defaults to 0 if not specified. D can\nbe negative to cause D digits left of the decimal point of the value X\nto become zero.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html\n\n','mysql> SELECT ROUND(-1.23);\n -> -1\nmysql> SELECT ROUND(-1.58);\n -> -2\nmysql> SELECT ROUND(1.58);\n -> 2\nmysql> SELECT ROUND(1.298, 1);\n -> 1.3\nmysql> SELECT ROUND(1.298, 0);\n -> 1\nmysql> SELECT ROUND(23.298, -1);\n -> 20\n','http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (50,7,'NULLIF','Syntax:\nNULLIF(expr1,expr2)\n\nReturns NULL if expr1 = expr2 is true, otherwise returns expr1. This is\nthe same as CASE WHEN expr1 = expr2 THEN NULL ELSE expr1 END.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/control-flow-functions.html\n\n','mysql> SELECT NULLIF(1,1);\n -> NULL\nmysql> SELECT NULLIF(1,2);\n -> 1\n','http://dev.mysql.com/doc/refman/5.5/en/control-flow-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (51,23,'CLOSE','Syntax:\nCLOSE cursor_name\n\nThis statement closes a previously opened cursor. For an example, see\nhttp://dev.mysql.com/doc/refman/5.5/en/cursors.html.\n\nAn error occurs if the cursor is not open.\n\nIf not closed explicitly, a cursor is closed at the end of the BEGIN\n... END block in which it was declared.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/close.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/close.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (52,8,'STOP SLAVE','Syntax:\nSTOP SLAVE [thread_types]\n\nthread_types:\n [thread_type [, thread_type] ... ]\n\nthread_type: IO_THREAD | SQL_THREAD\n\nStops the slave threads. STOP SLAVE requires the SUPER privilege.\nRecommended best practice is to execute STOP SLAVE on the slave before\nstopping the slave server (see\nhttp://dev.mysql.com/doc/refman/5.5/en/server-shutdown.html, for more\ninformation).\n\nWhen using the row-based logging format: You should execute STOP SLAVE\non the slave prior to shutting down the slave server if you are\nreplicating any tables that use a nontransactional storage engine (see\nthe Note later in this section). In MySQL 5.5.9 and later, you can also\nuse STOP SLAVE SQL_THREAD for this purpose.\n\nLike START SLAVE, this statement may be used with the IO_THREAD and\nSQL_THREAD options to name the thread or threads to be stopped.\n\n*Note*: In MySQL 5.5, STOP SLAVE waits until the current replication\nevent group affecting one or more non-transactional tables has finished\nexecuting (if there is any such replication group), or until the user\nissues a KILL QUERY or KILL CONNECTION statement. (Bug #319, Bug\n#38205)\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/stop-slave.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/stop-slave.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (53,31,'TIMEDIFF','Syntax:\nTIMEDIFF(expr1,expr2)\n\nTIMEDIFF() returns expr1 - expr2 expressed as a time value. expr1 and\nexpr2 are time or date-and-time expressions, but both must be of the\nsame type.\n\nThe result returned by TIMEDIFF() is limited to the range allowed for\nTIME values. Alternatively, you can use either of the functions\nTIMESTAMPDIFF() and UNIX_TIMESTAMP(), both of which return integers.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT TIMEDIFF(\'2000:01:01 00:00:00\',\n -> \'2000:01:01 00:00:00.000001\');\n -> \'-00:00:00.000001\'\nmysql> SELECT TIMEDIFF(\'2008-12-31 23:59:59.000001\',\n -> \'2008-12-30 01:01:01.000002\');\n -> \'46:58:57.999999\'\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (54,37,'REPLACE FUNCTION','Syntax:\nREPLACE(str,from_str,to_str)\n\nReturns the string str with all occurrences of the string from_str\nreplaced by the string to_str. REPLACE() performs a case-sensitive\nmatch when searching for from_str.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','mysql> SELECT REPLACE(\'www.mysql.com\', \'w\', \'Ww\');\n -> \'WwWwWw.mysql.com\'\n','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (55,28,'USE','Syntax:\nUSE db_name\n\nThe USE db_name statement tells MySQL to use the db_name database as\nthe default (current) database for subsequent statements. The database\nremains the default until the end of the session or another USE\nstatement is issued:\n\nUSE db1;\nSELECT COUNT(*) FROM mytable; # selects from db1.mytable\nUSE db2;\nSELECT COUNT(*) FROM mytable; # selects from db2.mytable\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/use.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/use.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (56,3,'LINEFROMTEXT','LineFromText(wkt[,srid]), LineStringFromText(wkt[,srid])\n\nConstructs a LINESTRING value using its WKT representation and SRID.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-wkt-functions\n\n','','http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-wkt-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (57,7,'CASE OPERATOR','Syntax:\nCASE value WHEN [compare_value] THEN result [WHEN [compare_value] THEN\nresult ...] [ELSE result] END\n\nCASE WHEN [condition] THEN result [WHEN [condition] THEN result ...]\n[ELSE result] END\n\nThe first version returns the result where value=compare_value. The\nsecond version returns the result for the first condition that is true.\nIf there was no matching result value, the result after ELSE is\nreturned, or NULL if there is no ELSE part.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/control-flow-functions.html\n\n','mysql> SELECT CASE 1 WHEN 1 THEN \'one\'\n -> WHEN 2 THEN \'two\' ELSE \'more\' END;\n -> \'one\'\nmysql> SELECT CASE WHEN 1>0 THEN \'true\' ELSE \'false\' END;\n -> \'true\'\nmysql> SELECT CASE BINARY \'B\'\n -> WHEN \'a\' THEN 1 WHEN \'b\' THEN 2 END;\n -> NULL\n','http://dev.mysql.com/doc/refman/5.5/en/control-flow-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (58,26,'SHOW MASTER STATUS','Syntax:\nSHOW MASTER STATUS\n\nThis statement provides status information about the binary log files\nof the master. It requires either the SUPER or REPLICATION CLIENT\nprivilege.\n\nExample:\n\nmysql> SHOW MASTER STATUS;\n+---------------+----------+--------------+------------------+\n| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |\n+---------------+----------+--------------+------------------+\n| mysql-bin.003 | 73 | test | manual,mysql |\n+---------------+----------+--------------+------------------+\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-master-status.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/show-master-status.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (59,31,'ADDTIME','Syntax:\nADDTIME(expr1,expr2)\n\nADDTIME() adds expr2 to expr1 and returns the result. expr1 is a time\nor datetime expression, and expr2 is a time expression.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT ADDTIME(\'2007-12-31 23:59:59.999999\', \'1 1:1:1.000002\');\n -> \'2008-01-02 01:01:01.000001\'\nmysql> SELECT ADDTIME(\'01:00:00.999999\', \'02:00:00.999998\');\n -> \'03:00:01.999997\'\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (60,34,'SPATIAL','For MyISAM tables, MySQL can create spatial indexes using syntax\nsimilar to that for creating regular indexes, but extended with the\nSPATIAL keyword. Currently, columns in spatial indexes must be declared\nNOT NULL. The following examples demonstrate how to create spatial\nindexes:\n\no With CREATE TABLE:\n\nCREATE TABLE geom (g GEOMETRY NOT NULL, SPATIAL INDEX(g)) ENGINE=MyISAM;\n\no With ALTER TABLE:\n\nALTER TABLE geom ADD SPATIAL INDEX(g);\n\no With CREATE INDEX:\n\nCREATE SPATIAL INDEX sp_index ON geom (g);\n\nFor MyISAM tables, SPATIAL INDEX creates an R-tree index. For storage\nengines that support nonspatial indexing of spatial columns, the engine\ncreates a B-tree index. A B-tree index on spatial values will be useful\nfor exact-value lookups, but not for range scans.\n\nFor more information on indexing spatial columns, see [HELP CREATE\nINDEX].\n\nTo drop spatial indexes, use ALTER TABLE or DROP INDEX:\n\no With ALTER TABLE:\n\nALTER TABLE geom DROP INDEX g;\n\no With DROP INDEX:\n\nDROP INDEX sp_index ON geom;\n\nExample: Suppose that a table geom contains more than 32,000\ngeometries, which are stored in the column g of type GEOMETRY. The\ntable also has an AUTO_INCREMENT column fid for storing object ID\nvalues.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-indexes.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-indexes.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (61,31,'TO_SECONDS','Syntax:\nTO_SECONDS(expr)\n\nGiven a date or datetime expr, returns a the number of seconds since\nthe year 0. If expr is not a valid date or datetime value, returns\nNULL.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT TO_SECONDS(950501);\n -> 62966505600\nmysql> SELECT TO_SECONDS(\'2009-11-29\');\n -> 63426672000\nmysql> SELECT TO_SECONDS(\'2009-11-29 13:43:32\');\n -> 63426721412\nmysql> SELECT TO_SECONDS( NOW() );\n -> 63426721458\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (62,31,'TIMESTAMPDIFF','Syntax:\nTIMESTAMPDIFF(unit,datetime_expr1,datetime_expr2)\n\nReturns datetime_expr2 - datetime_expr1, where datetime_expr1 and\ndatetime_expr2 are date or datetime expressions. One expression may be\na date and the other a datetime; a date value is treated as a datetime\nhaving the time part \'00:00:00\' where necessary. The unit for the\nresult (an integer) is given by the unit argument. The legal values for\nunit are the same as those listed in the description of the\nTIMESTAMPADD() function.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT TIMESTAMPDIFF(MONTH,\'2003-02-01\',\'2003-05-01\');\n -> 3\nmysql> SELECT TIMESTAMPDIFF(YEAR,\'2002-05-01\',\'2001-01-01\');\n -> -1\nmysql> SELECT TIMESTAMPDIFF(MINUTE,\'2003-02-01\',\'2003-05-01 12:05:55\');\n -> 128885\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (63,37,'UPPER','Syntax:\nUPPER(str)\n\nReturns the string str with all characters changed to uppercase\naccording to the current character set mapping. The default is latin1\n(cp1252 West European).\n\nmysql> SELECT UPPER(\'Hej\');\n -> \'HEJ\'\n\nSee the description of LOWER() for information that also applies to\nUPPER(), such as information about how to perform lettercase conversion\nof binary strings (BINARY, VARBINARY, BLOB) for which these functions\nare ineffective.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (64,31,'FROM_UNIXTIME','Syntax:\nFROM_UNIXTIME(unix_timestamp), FROM_UNIXTIME(unix_timestamp,format)\n\nReturns a representation of the unix_timestamp argument as a value in\n\'YYYY-MM-DD HH:MM:SS\' or YYYYMMDDHHMMSS.uuuuuu format, depending on\nwhether the function is used in a string or numeric context. The value\nis expressed in the current time zone. unix_timestamp is an internal\ntimestamp value such as is produced by the UNIX_TIMESTAMP() function.\n\nIf format is given, the result is formatted according to the format\nstring, which is used the same way as listed in the entry for the\nDATE_FORMAT() function.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT FROM_UNIXTIME(1196440219);\n -> \'2007-11-30 10:30:19\'\nmysql> SELECT FROM_UNIXTIME(1196440219) + 0;\n -> 20071130103019.000000\nmysql> SELECT FROM_UNIXTIME(UNIX_TIMESTAMP(),\n -> \'%Y %D %M %h:%i:%s %x\');\n -> \'2007 30th November 10:30:59 2007\'\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (65,22,'MEDIUMBLOB','MEDIUMBLOB\n\nA BLOB column with a maximum length of 16,777,215 (224 - 1) bytes. Each\nMEDIUMBLOB value is stored using a 3-byte length prefix that indicates\nthe number of bytes in the value.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/string-type-overview.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (66,12,'SHA2','Syntax:\nSHA2(str, hash_length)\n\nCalculates the SHA-2 family of hash functions (SHA-224, SHA-256,\nSHA-384, and SHA-512). The first argument is the cleartext string to be\nhashed. The second argument indicates the desired bit length of the\nresult, which must have a value of 224, 256, 384, 512, or 0 (which is\nequivalent to 256). If either argument is NULL or the hash length is\nnot one of the permitted values, the return value is NULL. Otherwise,\nthe function result is a hash value containing the desired number of\nbits. See the notes at the beginning of this section about storing hash\nvalues efficiently.\n\nAs of MySQL 5.5.6, the return value is a nonbinary string in the\nconnection character set. Before 5.5.6, the return value is a binary\nstring; see the notes at the beginning of this section about using the\nvalue as a nonbinary string.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/encryption-functions.html\n\n','mysql> SELECT SHA2(\'abc\', 224);\n -> \'23097d223405d8228642a477bda255b32aadbce4bda0b3f7e36c9da7\'\n','http://dev.mysql.com/doc/refman/5.5/en/encryption-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (67,7,'IFNULL','Syntax:\nIFNULL(expr1,expr2)\n\nIf expr1 is not NULL, IFNULL() returns expr1; otherwise it returns\nexpr2. IFNULL() returns a numeric or string value, depending on the\ncontext in which it is used.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/control-flow-functions.html\n\n','mysql> SELECT IFNULL(1,0);\n -> 1\nmysql> SELECT IFNULL(NULL,10);\n -> 10\nmysql> SELECT IFNULL(1/0,10);\n -> 10\nmysql> SELECT IFNULL(1/0,\'yes\');\n -> \'yes\'\n','http://dev.mysql.com/doc/refman/5.5/en/control-flow-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (68,26,'SHOW FUNCTION CODE','Syntax:\nSHOW FUNCTION CODE func_name\n\nThis statement is similar to SHOW PROCEDURE CODE but for stored\nfunctions. See [HELP SHOW PROCEDURE CODE].\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-function-code.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/show-function-code.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (69,26,'SHOW ERRORS','Syntax:\nSHOW ERRORS [LIMIT [offset,] row_count]\nSHOW COUNT(*) ERRORS\n\nThis statement is similar to SHOW WARNINGS, except that it displays\ninformation only for errors, rather than for errors, warnings, and\nnotes.\n\nThe LIMIT clause has the same syntax as for the SELECT statement. See\nhttp://dev.mysql.com/doc/refman/5.5/en/select.html.\n\nThe SHOW COUNT(*) ERRORS statement displays the number of errors. You\ncan also retrieve this number from the error_count variable:\n\nSHOW COUNT(*) ERRORS;\nSELECT @@error_count;\n\nSHOW ERRORS and error_count apply only to errors, not warnings or\nnotes. In other respects, they are similar to SHOW WARNINGS and\nwarning_count. In particular, SHOW ERRORS cannot display information\nfor more than max_error_count messages, and error_count can exceed the\nvalue of max_error_count if the number of errors exceeds\nmax_error_count.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-errors.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/show-errors.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (70,18,'LEAST','Syntax:\nLEAST(value1,value2,...)\n\nWith two or more arguments, returns the smallest (minimum-valued)\nargument. The arguments are compared using the following rules:\n\no If any argument is NULL, the result is NULL. No comparison is needed.\n\no If the return value is used in an INTEGER context or all arguments\n are integer-valued, they are compared as integers.\n\no If the return value is used in a REAL context or all arguments are\n real-valued, they are compared as reals.\n\no If the arguments comprise a mix of numbers and strings, they are\n compared as numbers.\n\no If any argument is a nonbinary (character) string, the arguments are\n compared as nonbinary strings.\n\no In all other cases, the arguments are compared as binary strings.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html\n\n','mysql> SELECT LEAST(2,0);\n -> 0\nmysql> SELECT LEAST(34.0,3.0,5.0,767.0);\n -> 3.0\nmysql> SELECT LEAST(\'B\',\'A\',\'C\');\n -> \'A\'\n','http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (71,18,'=','=\n\nEqual:\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html\n\n','mysql> SELECT 1 = 0;\n -> 0\nmysql> SELECT \'0\' = 0;\n -> 1\nmysql> SELECT \'0.0\' = 0;\n -> 1\nmysql> SELECT \'0.01\' = 0;\n -> 0\nmysql> SELECT \'.01\' = 0.01;\n -> 1\n','http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (72,37,'REVERSE','Syntax:\nREVERSE(str)\n\nReturns the string str with the order of the characters reversed.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','mysql> SELECT REVERSE(\'abc\');\n -> \'cba\'\n','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (73,18,'ISNULL','Syntax:\nISNULL(expr)\n\nIf expr is NULL, ISNULL() returns 1, otherwise it returns 0.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html\n\n','mysql> SELECT ISNULL(1+1);\n -> 0\nmysql> SELECT ISNULL(1/0);\n -> 1\n','http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (74,22,'BINARY','BINARY(M)\n\nThe BINARY type is similar to the CHAR type, but stores binary byte\nstrings rather than nonbinary character strings. M represents the\ncolumn length in bytes.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/string-type-overview.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (75,22,'BLOB DATA TYPE','A BLOB is a binary large object that can hold a variable amount of\ndata. The four BLOB types are TINYBLOB, BLOB, MEDIUMBLOB, and LONGBLOB.\nThese differ only in the maximum length of the values they can hold.\nThe four TEXT types are TINYTEXT, TEXT, MEDIUMTEXT, and LONGTEXT. These\ncorrespond to the four BLOB types and have the same maximum lengths and\nstorage requirements. See\nhttp://dev.mysql.com/doc/refman/5.5/en/storage-requirements.html.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/blob.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/blob.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (76,36,'BOUNDARY','Boundary(g)\n\nReturns a geometry that is the closure of the combinatorial boundary of\nthe geometry value g.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#general-geometry-property-functions\n\n','','http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#general-geometry-property-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (77,10,'CREATE USER','Syntax:\nCREATE USER user_specification\n [, user_specification] ...\n\nuser_specification:\n user\n [\n IDENTIFIED BY [PASSWORD] \'password\'\n | IDENTIFIED WITH auth_plugin [AS \'auth_string\']\n ]\n\nThe CREATE USER statement creates new MySQL accounts. To use it, you\nmust have the global CREATE USER privilege or the INSERT privilege for\nthe mysql database. For each account, CREATE USER creates a new row in\nthe mysql.user table and assigns the account no privileges. An error\noccurs if the account already exists.\n\nEach account name uses the format described in\nhttp://dev.mysql.com/doc/refman/5.5/en/account-names.html. For example:\n\nCREATE USER \'jeffrey\'@\'localhost\' IDENTIFIED BY \'mypass\';\n\nIf you specify only the user name part of the account name, a host name\npart of \'%\' is used.\n\nThe user specification may indicate how the user should authenticate\nwhen connecting to the server:\n\no To enable the user to connect with no password (which is insecure),\n include no IDENTIFIED BY clause:\n\nCREATE USER \'jeffrey\'@\'localhost\';\n\n In this case, the account uses built-in authentication and clients\n must provide no password.\n\no To assign a password, use IDENTIFIED BY with the literal plaintext\n password value:\n\nCREATE USER \'jeffrey\'@\'localhost\' IDENTIFIED BY \'mypass\';\n\n The account uses built-in authentication and clients must match the\n given password.\n\no To avoid specifying the plaintext password if you know its hash value\n (the value that PASSWORD() would return for the password), specify\n the hash value preceded by the keyword PASSWORD:\n\nCREATE USER \'jeffrey\'@\'localhost\'\nIDENTIFIED BY PASSWORD \'*90E462C37378CED12064BB3388827D2BA3A9B689\';\n\n The account uses built-in authentication and clients must match the\n given password.\n\no To authenticate the account using a specific authentication plugin,\n use IDENTIFIED WITH, where auth_plugin is the plugin name. It can be\n an unquoted name or a quoted string literal. \'auth_string\' is an\n optional quoted string literal to pass to the plugin. The plugin\n interprets the meaning of the string, so its format is plugin\n specific. Consult the documentation for a given plugin for\n information about the authentication string values it accepts.\n\nCREATE USER \'jeffrey\'@\'localhost\'\nIDENTIFIED WITH my_auth_plugin;\n\n For connections that use this account, the server invokes the named\n plugin and clients must provide credentials as required for the\n authentication method that the plugin implements. If the server\n cannot find the plugin, either at account-creation time or connect\n time, an error occurs. IDENTIFIED WITH can be used as of MySQL 5.5.7.\n\nThe IDENTIFIED BY and IDENTIFIED WITH clauses are mutually exclusive,\nso at most one of them can be specified for a given user.\n\nFor additional information about setting passwords, see\nhttp://dev.mysql.com/doc/refman/5.5/en/assigning-passwords.html.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/create-user.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/create-user.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (78,24,'POINT','Point(x,y)\n\nConstructs a Point using its coordinates.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-mysql-specific-functions\n\n','','http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-mysql-specific-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (79,17,'CURRENT_USER','Syntax:\nCURRENT_USER, CURRENT_USER()\n\nReturns the user name and host name combination for the MySQL account\nthat the server used to authenticate the current client. This account\ndetermines your access privileges. The return value is a string in the\nutf8 character set.\n\nThe value of CURRENT_USER() can differ from the value of USER().\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/information-functions.html\n\n','mysql> SELECT USER();\n -> \'davida@localhost\'\nmysql> SELECT * FROM mysql.user;\nERROR 1044: Access denied for user \'\'@\'localhost\' to\ndatabase \'mysql\'\nmysql> SELECT CURRENT_USER();\n -> \'@localhost\'\n','http://dev.mysql.com/doc/refman/5.5/en/information-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (80,37,'LCASE','Syntax:\nLCASE(str)\n\nLCASE() is a synonym for LOWER().\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (81,18,'<=','Syntax:\n<=\n\nLess than or equal:\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html\n\n','mysql> SELECT 0.1 <= 2;\n -> 1\n','http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (82,26,'SHOW PROFILES','Syntax:\nSHOW PROFILES\n\nThe SHOW PROFILES statement, together with SHOW PROFILE, displays\nprofiling information that indicates resource usage for statements\nexecuted during the course of the current session. For more\ninformation, see [HELP SHOW PROFILE].\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-profiles.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/show-profiles.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (83,27,'UPDATE','Syntax:\nSingle-table syntax:\n\nUPDATE [LOW_PRIORITY] [IGNORE] table_reference\n SET col_name1={expr1|DEFAULT} [, col_name2={expr2|DEFAULT}] ...\n [WHERE where_condition]\n [ORDER BY ...]\n [LIMIT row_count]\n\nMultiple-table syntax:\n\nUPDATE [LOW_PRIORITY] [IGNORE] table_references\n SET col_name1={expr1|DEFAULT} [, col_name2={expr2|DEFAULT}] ...\n [WHERE where_condition]\n\nFor the single-table syntax, the UPDATE statement updates columns of\nexisting rows in the named table with new values. The SET clause\nindicates which columns to modify and the values they should be given.\nEach value can be given as an expression, or the keyword DEFAULT to set\na column explicitly to its default value. The WHERE clause, if given,\nspecifies the conditions that identify which rows to update. With no\nWHERE clause, all rows are updated. If the ORDER BY clause is\nspecified, the rows are updated in the order that is specified. The\nLIMIT clause places a limit on the number of rows that can be updated.\n\nFor the multiple-table syntax, UPDATE updates rows in each table named\nin table_references that satisfy the conditions. In this case, ORDER BY\nand LIMIT cannot be used.\n\nwhere_condition is an expression that evaluates to true for each row to\nbe updated. For expression syntax, see\nhttp://dev.mysql.com/doc/refman/5.5/en/expressions.html.\n\ntable_references and where_condition are is specified as described in\nhttp://dev.mysql.com/doc/refman/5.5/en/select.html.\n\nYou need the UPDATE privilege only for columns referenced in an UPDATE\nthat are actually updated. You need only the SELECT privilege for any\ncolumns that are read but not modified.\n\nThe UPDATE statement supports the following modifiers:\n\no With the LOW_PRIORITY keyword, execution of the UPDATE is delayed\n until no other clients are reading from the table. This affects only\n storage engines that use only table-level locking (such as MyISAM,\n MEMORY, and MERGE).\n\no With the IGNORE keyword, the update statement does not abort even if\n errors occur during the update. Rows for which duplicate-key\n conflicts occur are not updated. Rows for which columns are updated\n to values that would cause data conversion errors are updated to the\n closest valid values instead.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/update.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/update.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (84,18,'IS NOT NULL','Syntax:\nIS NOT NULL\n\nTests whether a value is not NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html\n\n','mysql> SELECT 1 IS NOT NULL, 0 IS NOT NULL, NULL IS NOT NULL;\n -> 1, 1, 0\n','http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (85,23,'CASE STATEMENT','Syntax:\nCASE case_value\n WHEN when_value THEN statement_list\n [WHEN when_value THEN statement_list] ...\n [ELSE statement_list]\nEND CASE\n\nOr:\n\nCASE\n WHEN search_condition THEN statement_list\n [WHEN search_condition THEN statement_list] ...\n [ELSE statement_list]\nEND CASE\n\nThe CASE statement for stored programs implements a complex conditional\nconstruct.\n\n*Note*: There is also a CASE expression, which differs from the CASE\nstatement described here. See\nhttp://dev.mysql.com/doc/refman/5.5/en/control-flow-functions.html. The\nCASE statement cannot have an ELSE NULL clause, and it is terminated\nwith END CASE instead of END.\n\nFor the first syntax, case_value is an expression. This value is\ncompared to the when_value expression in each WHEN clause until one of\nthem is equal. When an equal when_value is found, the corresponding\nTHEN clause statement_list executes. If no when_value is equal, the\nELSE clause statement_list executes, if there is one.\n\nThis syntax cannot be used to test for equality with NULL because NULL\n= NULL is false. See\nhttp://dev.mysql.com/doc/refman/5.5/en/working-with-null.html.\n\nFor the second syntax, each WHEN clause search_condition expression is\nevaluated until one is true, at which point its corresponding THEN\nclause statement_list executes. If no search_condition is equal, the\nELSE clause statement_list executes, if there is one.\n\nIf no when_value or search_condition matches the value tested and the\nCASE statement contains no ELSE clause, a Case not found for CASE\nstatement error results.\n\nEach statement_list consists of one or more SQL statements; an empty\nstatement_list is not permitted.\n\nTo handle situations where no value is matched by any WHEN clause, use\nan ELSE containing an empty BEGIN ... END block, as shown in this\nexample. (The indentation used here in the ELSE clause is for purposes\nof clarity only, and is not otherwise significant.)\n\nDELIMITER |\n\nCREATE PROCEDURE p()\n BEGIN\n DECLARE v INT DEFAULT 1;\n\n CASE v\n WHEN 2 THEN SELECT v;\n WHEN 3 THEN SELECT 0;\n ELSE\n BEGIN\n END;\n END CASE;\n END;\n |\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/case.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/case.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (86,8,'EXECUTE STATEMENT','Syntax:\nEXECUTE stmt_name\n [USING @var_name [, @var_name] ...]\n\nAfter preparing a statement with PREPARE, you execute it with an\nEXECUTE statement that refers to the prepared statement name. If the\nprepared statement contains any parameter markers, you must supply a\nUSING clause that lists user variables containing the values to be\nbound to the parameters. Parameter values can be supplied only by user\nvariables, and the USING clause must name exactly as many variables as\nthe number of parameter markers in the statement.\n\nYou can execute a given prepared statement multiple times, passing\ndifferent variables to it or setting the variables to different values\nbefore each execution.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/execute.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/execute.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (87,39,'DROP INDEX','Syntax:\nDROP [ONLINE|OFFLINE] INDEX index_name ON tbl_name\n\nDROP INDEX drops the index named index_name from the table tbl_name.\nThis statement is mapped to an ALTER TABLE statement to drop the index.\nSee [HELP ALTER TABLE].\n\nTo drop a primary key, the index name is always PRIMARY, which must be\nspecified as a quoted identifier because PRIMARY is a reserved word:\n\nDROP INDEX `PRIMARY` ON t;\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/drop-index.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/drop-index.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (88,37,'MATCH AGAINST','Syntax:\nMATCH (col1,col2,...) AGAINST (expr [search_modifier])\n\nMySQL has support for full-text indexing and searching:\n\no A full-text index in MySQL is an index of type FULLTEXT.\n\no Full-text indexes can be used only with MyISAM tables, and can be\n created only for CHAR, VARCHAR, or TEXT columns.\n\no A FULLTEXT index definition can be given in the CREATE TABLE\n statement when a table is created, or added later using ALTER TABLE\n or CREATE INDEX.\n\no For large data sets, it is much faster to load your data into a table\n that has no FULLTEXT index and then create the index after that, than\n to load data into a table that has an existing FULLTEXT index.\n\nFull-text searching is performed using MATCH() ... AGAINST syntax.\nMATCH() takes a comma-separated list that names the columns to be\nsearched. AGAINST takes a string to search for, and an optional\nmodifier that indicates what type of search to perform. The search\nstring must be a literal string, not a variable or a column name. There\nare three types of full-text searches:\n\no A natural language search interprets the search string as a phrase in\n natural human language (a phrase in free text). There are no special\n operators. The stopword list applies. In addition, words that are\n present in 50% or more of the rows are considered common and do not\n match.\n\n Full-text searches are natural language searches if the IN NATURAL\n LANGUAGE MODE modifier is given or if no modifier is given. For more\n information, see\n http://dev.mysql.com/doc/refman/5.5/en/fulltext-natural-language.html\n .\n\no A boolean search interprets the search string using the rules of a\n special query language. The string contains the words to search for.\n It can also contain operators that specify requirements such that a\n word must be present or absent in matching rows, or that it should be\n weighted higher or lower than usual. Common words such as "some" or\n "then" are stopwords and do not match if present in the search\n string. The IN BOOLEAN MODE modifier specifies a boolean search. For\n more information, see\n http://dev.mysql.com/doc/refman/5.5/en/fulltext-boolean.html.\n\no A query expansion search is a modification of a natural language\n search. The search string is used to perform a natural language\n search. Then words from the most relevant rows returned by the search\n are added to the search string and the search is done again. The\n query returns the rows from the second search. The IN NATURAL\n LANGUAGE MODE WITH QUERY EXPANSION or WITH QUERY EXPANSION modifier\n specifies a query expansion search. For more information, see\n http://dev.mysql.com/doc/refman/5.5/en/fulltext-query-expansion.html.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/fulltext-search.html\n\n','mysql> SELECT id, body, MATCH (title,body) AGAINST\n -> (\'Security implications of running MySQL as root\'\n -> IN NATURAL LANGUAGE MODE) AS score\n -> FROM articles WHERE MATCH (title,body) AGAINST\n -> (\'Security implications of running MySQL as root\'\n -> IN NATURAL LANGUAGE MODE);\n+----+-------------------------------------+-----------------+\n| id | body | score |\n+----+-------------------------------------+-----------------+\n| 4 | 1. Never run mysqld as root. 2. ... | 1.5219271183014 |\n| 6 | When configured properly, MySQL ... | 1.3114095926285 |\n+----+-------------------------------------+-----------------+\n2 rows in set (0.00 sec)\n','http://dev.mysql.com/doc/refman/5.5/en/fulltext-search.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (89,39,'CREATE EVENT','Syntax:\nCREATE\n [DEFINER = { user | CURRENT_USER }]\n EVENT\n [IF NOT EXISTS]\n event_name\n ON SCHEDULE schedule\n [ON COMPLETION [NOT] PRESERVE]\n [ENABLE | DISABLE | DISABLE ON SLAVE]\n [COMMENT \'comment\']\n DO event_body;\n\nschedule:\n AT timestamp [+ INTERVAL interval] ...\n | EVERY interval\n [STARTS timestamp [+ INTERVAL interval] ...]\n [ENDS timestamp [+ INTERVAL interval] ...]\n\ninterval:\n quantity {YEAR | QUARTER | MONTH | DAY | HOUR | MINUTE |\n WEEK | SECOND | YEAR_MONTH | DAY_HOUR | DAY_MINUTE |\n DAY_SECOND | HOUR_MINUTE | HOUR_SECOND | MINUTE_SECOND}\n\nThis statement creates and schedules a new event. The event will not\nrun unless the Event Scheduler is enabled. For information about\nchecking Event Scheduler status and enabling it if necessary, see\nhttp://dev.mysql.com/doc/refman/5.5/en/events-configuration.html.\n\nCREATE EVENT requires the EVENT privilege for the schema in which the\nevent is to be created. It might also require the SUPER privilege,\ndepending on the DEFINER value, as described later in this section.\n\nThe minimum requirements for a valid CREATE EVENT statement are as\nfollows:\n\no The keywords CREATE EVENT plus an event name, which uniquely\n identifies the event in a database schema.\n\no An ON SCHEDULE clause, which determines when and how often the event\n executes.\n\no A DO clause, which contains the SQL statement to be executed by an\n event.\n\nThis is an example of a minimal CREATE EVENT statement:\n\nCREATE EVENT myevent\n ON SCHEDULE AT CURRENT_TIMESTAMP + INTERVAL 1 HOUR\n DO\n UPDATE myschema.mytable SET mycol = mycol + 1;\n\nThe previous statement creates an event named myevent. This event\nexecutes once---one hour following its creation---by running an SQL\nstatement that increments the value of the myschema.mytable table\'s\nmycol column by 1.\n\nThe event_name must be a valid MySQL identifier with a maximum length\nof 64 characters. Event names are not case sensitive, so you cannot\nhave two events named myevent and MyEvent in the same schema. In\ngeneral, the rules governing event names are the same as those for\nnames of stored routines. See\nhttp://dev.mysql.com/doc/refman/5.5/en/identifiers.html.\n\nAn event is associated with a schema. If no schema is indicated as part\nof event_name, the default (current) schema is assumed. To create an\nevent in a specific schema, qualify the event name with a schema using\nschema_name.event_name syntax.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/create-event.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/create-event.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (90,4,'ABS','Syntax:\nABS(X)\n\nReturns the absolute value of X.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html\n\n','mysql> SELECT ABS(2);\n -> 2\nmysql> SELECT ABS(-32);\n -> 32\n','http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (91,32,'POLYFROMWKB','PolyFromWKB(wkb[,srid]), PolygonFromWKB(wkb[,srid])\n\nConstructs a POLYGON value using its WKB representation and SRID.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-wkb-functions\n\n','','http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-wkb-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (92,37,'NOT LIKE','Syntax:\nexpr NOT LIKE pat [ESCAPE \'escape_char\']\n\nThis is the same as NOT (expr LIKE pat [ESCAPE \'escape_char\']).\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-comparison-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/string-comparison-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (93,37,'SPACE','Syntax:\nSPACE(N)\n\nReturns a string consisting of N space characters.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','mysql> SELECT SPACE(6);\n -> \' \'\n','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (94,6,'MBR DEFINITION','Its MBR (Minimum Bounding Rectangle), or Envelope. This is the bounding\ngeometry, formed by the minimum and maximum (X,Y) coordinates:\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/gis-class-geometry.html\n\n','((MINX MINY, MAXX MINY, MAXX MAXY, MINX MAXY, MINX MINY))\n','http://dev.mysql.com/doc/refman/5.5/en/gis-class-geometry.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (95,24,'GEOMETRYCOLLECTION','GeometryCollection(g1,g2,...)\n\nConstructs a GeometryCollection.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-mysql-specific-functions\n\n','','http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-mysql-specific-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (96,16,'MAX','Syntax:\nMAX([DISTINCT] expr)\n\nReturns the maximum value of expr. MAX() may take a string argument; in\nsuch cases, it returns the maximum string value. See\nhttp://dev.mysql.com/doc/refman/5.5/en/mysql-indexes.html. The DISTINCT\nkeyword can be used to find the maximum of the distinct values of expr,\nhowever, this produces the same result as omitting DISTINCT.\n\nMAX() returns NULL if there were no matching rows.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/group-by-functions.html\n\n','mysql> SELECT student_name, MIN(test_score), MAX(test_score)\n -> FROM student\n -> GROUP BY student_name;\n','http://dev.mysql.com/doc/refman/5.5/en/group-by-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (97,21,'CREATE FUNCTION UDF','Syntax:\nCREATE [AGGREGATE] FUNCTION function_name RETURNS {STRING|INTEGER|REAL|DECIMAL}\n SONAME shared_library_name\n\nA user-defined function (UDF) is a way to extend MySQL with a new\nfunction that works like a native (built-in) MySQL function such as\nABS() or CONCAT().\n\nfunction_name is the name that should be used in SQL statements to\ninvoke the function. The RETURNS clause indicates the type of the\nfunction\'s return value. DECIMAL is a legal value after RETURNS, but\ncurrently DECIMAL functions return string values and should be written\nlike STRING functions.\n\nshared_library_name is the basename of the shared object file that\ncontains the code that implements the function. The file must be\nlocated in the plugin directory. This directory is given by the value\nof the plugin_dir system variable. For more information, see\nhttp://dev.mysql.com/doc/refman/5.5/en/udf-compiling.html.\n\nTo create a function, you must have the INSERT privilege for the mysql\ndatabase. This is necessary because CREATE FUNCTION adds a row to the\nmysql.func system table that records the function\'s name, type, and\nshared library name. If you do not have this table, you should run the\nmysql_upgrade command to create it. See\nhttp://dev.mysql.com/doc/refman/5.5/en/mysql-upgrade.html.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/create-function-udf.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/create-function-udf.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (98,4,'*','Syntax:\n*\n\nMultiplication:\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/arithmetic-functions.html\n\n','mysql> SELECT 3*5;\n -> 15\nmysql> SELECT 18014398509481984*18014398509481984.0;\n -> 324518553658426726783156020576256.0\nmysql> SELECT 18014398509481984*18014398509481984;\n -> 0\n','http://dev.mysql.com/doc/refman/5.5/en/arithmetic-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (99,22,'TIMESTAMP','TIMESTAMP\n\nA timestamp. The range is \'1970-01-01 00:00:01\' UTC to \'2038-01-19\n03:14:07\' UTC. TIMESTAMP values are stored as the number of seconds\nsince the epoch (\'1970-01-01 00:00:00\' UTC). A TIMESTAMP cannot\nrepresent the value \'1970-01-01 00:00:00\' because that is equivalent to\n0 seconds from the epoch and the value 0 is reserved for representing\n\'0000-00-00 00:00:00\', the "zero" TIMESTAMP value.\n\nUnless specified otherwise, the first TIMESTAMP column in a table is\ndefined to be automatically set to the date and time of the most recent\nmodification if not explicitly assigned a value. This makes TIMESTAMP\nuseful for recording the timestamp of an INSERT or UPDATE operation.\nYou can also set any TIMESTAMP column to the current date and time by\nassigning it a NULL value, unless it has been defined with the NULL\nattribute to permit NULL values. The automatic initialization and\nupdating to the current date and time can be specified using DEFAULT\nCURRENT_TIMESTAMP and ON UPDATE CURRENT_TIMESTAMP clauses, as described\nin\nhttp://dev.mysql.com/doc/refman/5.5/en/timestamp-initialization.html.\n\n*Note*: The TIMESTAMP format that was used prior to MySQL 4.1 is not\nsupported in MySQL 5.5; see MySQL 3.23, 4.0, 4.1 Reference Manual for\ninformation regarding the old format.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-type-overview.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (100,12,'DES_DECRYPT','Syntax:\nDES_DECRYPT(crypt_str[,key_str])\n\nDecrypts a string encrypted with DES_ENCRYPT(). If an error occurs,\nthis function returns NULL.\n\nThis function works only if MySQL has been configured with SSL support.\nSee http://dev.mysql.com/doc/refman/5.5/en/ssl-connections.html.\n\nIf no key_str argument is given, DES_DECRYPT() examines the first byte\nof the encrypted string to determine the DES key number that was used\nto encrypt the original string, and then reads the key from the DES key\nfile to decrypt the message. For this to work, the user must have the\nSUPER privilege. The key file can be specified with the --des-key-file\nserver option.\n\nIf you pass this function a key_str argument, that string is used as\nthe key for decrypting the message.\n\nIf the crypt_str argument does not appear to be an encrypted string,\nMySQL returns the given crypt_str.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/encryption-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/encryption-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (101,26,'CACHE INDEX','Syntax:\nCACHE INDEX\n tbl_index_list [, tbl_index_list] ...\n [PARTITION (partition_list | ALL)]\n IN key_cache_name\n\ntbl_index_list:\n tbl_name [[INDEX|KEY] (index_name[, index_name] ...)]\n\npartition_list:\n partition_name[, partition_name][, ...]\n\nThe CACHE INDEX statement assigns table indexes to a specific key\ncache. It is used only for MyISAM tables. After the indexes have been\nassigned, they can be preloaded into the cache if desired with LOAD\nINDEX INTO CACHE.\n\nThe following statement assigns indexes from the tables t1, t2, and t3\nto the key cache named hot_cache:\n\nmysql> CACHE INDEX t1, t2, t3 IN hot_cache;\n+---------+--------------------+----------+----------+\n| Table | Op | Msg_type | Msg_text |\n+---------+--------------------+----------+----------+\n| test.t1 | assign_to_keycache | status | OK |\n| test.t2 | assign_to_keycache | status | OK |\n| test.t3 | assign_to_keycache | status | OK |\n+---------+--------------------+----------+----------+\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/cache-index.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/cache-index.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (102,13,'ENDPOINT','EndPoint(ls)\n\nReturns the Point that is the endpoint of the LineString value ls.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#linestring-property-functions\n\n','mysql> SET @ls = \'LineString(1 1,2 2,3 3)\';\nmysql> SELECT AsText(EndPoint(GeomFromText(@ls)));\n+-------------------------------------+\n| AsText(EndPoint(GeomFromText(@ls))) |\n+-------------------------------------+\n| POINT(3 3) |\n+-------------------------------------+\n','http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#linestring-property-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (103,12,'COMPRESS','Syntax:\nCOMPRESS(string_to_compress)\n\nCompresses a string and returns the result as a binary string. This\nfunction requires MySQL to have been compiled with a compression\nlibrary such as zlib. Otherwise, the return value is always NULL. The\ncompressed string can be uncompressed with UNCOMPRESS().\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/encryption-functions.html\n\n','mysql> SELECT LENGTH(COMPRESS(REPEAT(\'a\',1000)));\n -> 21\nmysql> SELECT LENGTH(COMPRESS(\'\'));\n -> 0\nmysql> SELECT LENGTH(COMPRESS(\'a\'));\n -> 13\nmysql> SELECT LENGTH(COMPRESS(REPEAT(\'a\',16)));\n -> 15\n','http://dev.mysql.com/doc/refman/5.5/en/encryption-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (104,27,'INSERT','Syntax:\nINSERT [LOW_PRIORITY | DELAYED | HIGH_PRIORITY] [IGNORE]\n [INTO] tbl_name [(col_name,...)]\n {VALUES | VALUE} ({expr | DEFAULT},...),(...),...\n [ ON DUPLICATE KEY UPDATE\n col_name=expr\n [, col_name=expr] ... ]\n\nOr:\n\nINSERT [LOW_PRIORITY | DELAYED | HIGH_PRIORITY] [IGNORE]\n [INTO] tbl_name\n SET col_name={expr | DEFAULT}, ...\n [ ON DUPLICATE KEY UPDATE\n col_name=expr\n [, col_name=expr] ... ]\n\nOr:\n\nINSERT [LOW_PRIORITY | HIGH_PRIORITY] [IGNORE]\n [INTO] tbl_name [(col_name,...)]\n SELECT ...\n [ ON DUPLICATE KEY UPDATE\n col_name=expr\n [, col_name=expr] ... ]\n\nINSERT inserts new rows into an existing table. The INSERT ... VALUES\nand INSERT ... SET forms of the statement insert rows based on\nexplicitly specified values. The INSERT ... SELECT form inserts rows\nselected from another table or tables. INSERT ... SELECT is discussed\nfurther in [HELP INSERT SELECT].\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/insert.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/insert.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (105,16,'COUNT','Syntax:\nCOUNT(expr)\n\nReturns a count of the number of non-NULL values of expr in the rows\nretrieved by a SELECT statement. The result is a BIGINT value.\n\nCOUNT() returns 0 if there were no matching rows.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/group-by-functions.html\n\n','mysql> SELECT student.student_name,COUNT(*)\n -> FROM student,course\n -> WHERE student.student_id=course.student_id\n -> GROUP BY student_name;\n','http://dev.mysql.com/doc/refman/5.5/en/group-by-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (106,27,'HANDLER','Syntax:\nHANDLER tbl_name OPEN [ [AS] alias]\n\nHANDLER tbl_name READ index_name { = | <= | >= | < | > } (value1,value2,...)\n [ WHERE where_condition ] [LIMIT ... ]\nHANDLER tbl_name READ index_name { FIRST | NEXT | PREV | LAST }\n [ WHERE where_condition ] [LIMIT ... ]\nHANDLER tbl_name READ { FIRST | NEXT }\n [ WHERE where_condition ] [LIMIT ... ]\n\nHANDLER tbl_name CLOSE\n\nThe HANDLER statement provides direct access to table storage engine\ninterfaces. It is available for MyISAM and InnoDB tables.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/handler.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/handler.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (107,3,'MLINEFROMTEXT','MLineFromText(wkt[,srid]), MultiLineStringFromText(wkt[,srid])\n\nConstructs a MULTILINESTRING value using its WKT representation and\nSRID.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-wkt-functions\n\n','','http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-wkt-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (108,32,'GEOMCOLLFROMWKB','GeomCollFromWKB(wkb[,srid]), GeometryCollectionFromWKB(wkb[,srid])\n\nConstructs a GEOMETRYCOLLECTION value using its WKB representation and\nSRID.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-wkb-functions\n\n','','http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-wkb-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (109,9,'HELP_DATE','This help information was generated from the MySQL 5.5 Reference Manual\non: 2012-08-25\n','',''); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (110,39,'RENAME TABLE','Syntax:\nRENAME TABLE tbl_name TO new_tbl_name\n [, tbl_name2 TO new_tbl_name2] ...\n\nThis statement renames one or more tables.\n\nThe rename operation is done atomically, which means that no other\nsession can access any of the tables while the rename is running. For\nexample, if you have an existing table old_table, you can create\nanother table new_table that has the same structure but is empty, and\nthen replace the existing table with the empty one as follows (assuming\nthat backup_table does not already exist):\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/rename-table.html\n\n','CREATE TABLE new_table (...);\nRENAME TABLE old_table TO backup_table, new_table TO old_table;\n','http://dev.mysql.com/doc/refman/5.5/en/rename-table.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (111,22,'BOOLEAN','BOOL, BOOLEAN\n\nThese types are synonyms for TINYINT(1). A value of zero is considered\nfalse. Nonzero values are considered true:\n\nmysql> SELECT IF(0, \'true\', \'false\');\n+------------------------+\n| IF(0, \'true\', \'false\') |\n+------------------------+\n| false |\n+------------------------+\n\nmysql> SELECT IF(1, \'true\', \'false\');\n+------------------------+\n| IF(1, \'true\', \'false\') |\n+------------------------+\n| true |\n+------------------------+\n\nmysql> SELECT IF(2, \'true\', \'false\');\n+------------------------+\n| IF(2, \'true\', \'false\') |\n+------------------------+\n| true |\n+------------------------+\n\nHowever, the values TRUE and FALSE are merely aliases for 1 and 0,\nrespectively, as shown here:\n\nmysql> SELECT IF(0 = FALSE, \'true\', \'false\');\n+--------------------------------+\n| IF(0 = FALSE, \'true\', \'false\') |\n+--------------------------------+\n| true |\n+--------------------------------+\n\nmysql> SELECT IF(1 = TRUE, \'true\', \'false\');\n+-------------------------------+\n| IF(1 = TRUE, \'true\', \'false\') |\n+-------------------------------+\n| true |\n+-------------------------------+\n\nmysql> SELECT IF(2 = TRUE, \'true\', \'false\');\n+-------------------------------+\n| IF(2 = TRUE, \'true\', \'false\') |\n+-------------------------------+\n| false |\n+-------------------------------+\n\nmysql> SELECT IF(2 = FALSE, \'true\', \'false\');\n+--------------------------------+\n| IF(2 = FALSE, \'true\', \'false\') |\n+--------------------------------+\n| false |\n+--------------------------------+\n\nThe last two statements display the results shown because 2 is equal to\nneither 1 nor 0.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/numeric-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/numeric-type-overview.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (112,14,'DEFAULT','Syntax:\nDEFAULT(col_name)\n\nReturns the default value for a table column. An error results if the\ncolumn has no default value.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/miscellaneous-functions.html\n\n','mysql> UPDATE t SET i = DEFAULT(i)+1 WHERE id < 100;\n','http://dev.mysql.com/doc/refman/5.5/en/miscellaneous-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (113,4,'MOD','Syntax:\nMOD(N,M), N % M, N MOD M\n\nModulo operation. Returns the remainder of N divided by M.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html\n\n','mysql> SELECT MOD(234, 10);\n -> 4\nmysql> SELECT 253 % 7;\n -> 1\nmysql> SELECT MOD(29,9);\n -> 2\nmysql> SELECT 29 MOD 9;\n -> 2\n','http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (114,22,'TINYTEXT','TINYTEXT [CHARACTER SET charset_name] [COLLATE collation_name]\n\nA TEXT column with a maximum length of 255 (28 - 1) characters. The\neffective maximum length is less if the value contains multi-byte\ncharacters. Each TINYTEXT value is stored using a 1-byte length prefix\nthat indicates the number of bytes in the value.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/string-type-overview.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (115,20,'OPTIMIZE TABLE','Syntax:\nOPTIMIZE [NO_WRITE_TO_BINLOG | LOCAL] TABLE\n tbl_name [, tbl_name] ...\n\nOPTIMIZE TABLE should be used if you have deleted a large part of a\ntable or if you have made many changes to a table with variable-length\nrows (tables that have VARCHAR, VARBINARY, BLOB, or TEXT columns).\nDeleted rows are maintained in a linked list and subsequent INSERT\noperations reuse old row positions. You can use OPTIMIZE TABLE to\nreclaim the unused space and to defragment the data file. After\nextensive changes to a table, this statement may also improve\nperformance of statements that use the table, sometimes significantly.\n\nThis statement requires SELECT and INSERT privileges for the table.\n\nOPTIMIZE TABLE is supported for partitioned tables, and you can use\nALTER TABLE ... OPTIMIZE PARTITION to optimize one or more partitions;\nfor more information, see [HELP ALTER TABLE], and\nhttp://dev.mysql.com/doc/refman/5.5/en/partitioning-maintenance.html.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/optimize-table.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/optimize-table.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (116,12,'DECODE','Syntax:\nDECODE(crypt_str,pass_str)\n\nDecrypts the encrypted string crypt_str using pass_str as the password.\ncrypt_str should be a string returned from ENCODE().\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/encryption-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/encryption-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (117,18,'<=>','Syntax:\n<=>\n\nNULL-safe equal. This operator performs an equality comparison like the\n= operator, but returns 1 rather than NULL if both operands are NULL,\nand 0 rather than NULL if one operand is NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html\n\n','mysql> SELECT 1 <=> 1, NULL <=> NULL, 1 <=> NULL;\n -> 1, 1, 0\nmysql> SELECT 1 = 1, NULL = NULL, 1 = NULL;\n -> 1, NULL, NULL\n','http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (118,28,'HELP STATEMENT','Syntax:\nHELP \'search_string\'\n\nThe HELP statement returns online information from the MySQL Reference\nmanual. Its proper operation requires that the help tables in the mysql\ndatabase be initialized with help topic information (see\nhttp://dev.mysql.com/doc/refman/5.5/en/server-side-help-support.html).\n\nThe HELP statement searches the help tables for the given search string\nand displays the result of the search. The search string is not case\nsensitive.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/help.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/help.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (119,26,'RESET','Syntax:\nRESET reset_option [, reset_option] ...\n\nThe RESET statement is used to clear the state of various server\noperations. You must have the RELOAD privilege to execute RESET.\n\nRESET acts as a stronger version of the FLUSH statement. See [HELP\nFLUSH].\n\nThe RESET statement causes an implicit commit. See\nhttp://dev.mysql.com/doc/refman/5.5/en/implicit-commit.html.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/reset.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/reset.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (120,14,'GET_LOCK','Syntax:\nGET_LOCK(str,timeout)\n\nTries to obtain a lock with a name given by the string str, using a\ntimeout of timeout seconds. Returns 1 if the lock was obtained\nsuccessfully, 0 if the attempt timed out (for example, because another\nclient has previously locked the name), or NULL if an error occurred\n(such as running out of memory or the thread was killed with mysqladmin\nkill). If you have a lock obtained with GET_LOCK(), it is released when\nyou execute RELEASE_LOCK(), execute a new GET_LOCK(), or your\nconnection terminates (either normally or abnormally). Locks obtained\nwith GET_LOCK() do not interact with transactions. That is, committing\na transaction does not release any such locks obtained during the\ntransaction.\n\nThis function can be used to implement application locks or to simulate\nrecord locks. Names are locked on a server-wide basis. If a name has\nbeen locked by one client, GET_LOCK() blocks any request by another\nclient for a lock with the same name. This enables clients that agree\non a given lock name to use the name to perform cooperative advisory\nlocking. But be aware that it also enables a client that is not among\nthe set of cooperating clients to lock a name, either inadvertently or\ndeliberately, and thus prevent any of the cooperating clients from\nlocking that name. One way to reduce the likelihood of this is to use\nlock names that are database-specific or application-specific. For\nexample, use lock names of the form db_name.str or app_name.str.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/miscellaneous-functions.html\n\n','mysql> SELECT GET_LOCK(\'lock1\',10);\n -> 1\nmysql> SELECT IS_FREE_LOCK(\'lock2\');\n -> 1\nmysql> SELECT GET_LOCK(\'lock2\',10);\n -> 1\nmysql> SELECT RELEASE_LOCK(\'lock2\');\n -> 1\nmysql> SELECT RELEASE_LOCK(\'lock1\');\n -> NULL\n','http://dev.mysql.com/doc/refman/5.5/en/miscellaneous-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (121,37,'UCASE','Syntax:\nUCASE(str)\n\nUCASE() is a synonym for UPPER().\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (122,26,'SHOW BINLOG EVENTS','Syntax:\nSHOW BINLOG EVENTS\n [IN \'log_name\'] [FROM pos] [LIMIT [offset,] row_count]\n\nShows the events in the binary log. If you do not specify \'log_name\',\nthe first binary log is displayed.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-binlog-events.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/show-binlog-events.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (123,32,'MPOLYFROMWKB','MPolyFromWKB(wkb[,srid]), MultiPolygonFromWKB(wkb[,srid])\n\nConstructs a MULTIPOLYGON value using its WKB representation and SRID.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-wkb-functions\n\n','','http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-wkb-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (124,23,'ITERATE','Syntax:\nITERATE label\n\nITERATE can appear only within LOOP, REPEAT, and WHILE statements.\nITERATE means "start the loop again."\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/iterate.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/iterate.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (125,27,'DO','Syntax:\nDO expr [, expr] ...\n\nDO executes the expressions but does not return any results. In most\nrespects, DO is shorthand for SELECT expr, ..., but has the advantage\nthat it is slightly faster when you do not care about the result.\n\nDO is useful primarily with functions that have side effects, such as\nRELEASE_LOCK().\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/do.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/do.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (126,31,'CURTIME','Syntax:\nCURTIME()\n\nReturns the current time as a value in \'HH:MM:SS\' or HHMMSS.uuuuuu\nformat, depending on whether the function is used in a string or\nnumeric context. The value is expressed in the current time zone.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT CURTIME();\n -> \'23:50:26\'\nmysql> SELECT CURTIME() + 0;\n -> 235026.000000\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (127,37,'CHAR_LENGTH','Syntax:\nCHAR_LENGTH(str)\n\nReturns the length of the string str, measured in characters. A\nmulti-byte character counts as a single character. This means that for\na string containing five 2-byte characters, LENGTH() returns 10,\nwhereas CHAR_LENGTH() returns 5.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (128,22,'BIGINT','BIGINT[(M)] [UNSIGNED] [ZEROFILL]\n\nA large integer. The signed range is -9223372036854775808 to\n9223372036854775807. The unsigned range is 0 to 18446744073709551615.\n\nSERIAL is an alias for BIGINT UNSIGNED NOT NULL AUTO_INCREMENT UNIQUE.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/numeric-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/numeric-type-overview.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (129,26,'SET','Syntax:\nSET variable_assignment [, variable_assignment] ...\n\nvariable_assignment:\n user_var_name = expr\n | [GLOBAL | SESSION] system_var_name = expr\n | [@@global. | @@session. | @@]system_var_name = expr\n\nThe SET statement assigns values to different types of variables that\naffect the operation of the server or your client. Older versions of\nMySQL employed SET OPTION, but this syntax is deprecated in favor of\nSET without OPTION.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/set-statement.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/set-statement.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (130,27,'LOAD XML','Syntax:\nLOAD XML [LOW_PRIORITY | CONCURRENT] [LOCAL] INFILE \'file_name\'\n [REPLACE | IGNORE]\n INTO TABLE [db_name.]tbl_name\n [CHARACTER SET charset_name]\n [ROWS IDENTIFIED BY \'\']\n [IGNORE number {LINES | ROWS}]\n [(column_or_user_var,...)]\n [SET col_name = expr,...]\n\nThe LOAD XML statement reads data from an XML file into a table. The\nfile_name must be given as a literal string. The tagname in the\noptional ROWS IDENTIFIED BY clause must also be given as a literal\nstring, and must be surrounded by angle brackets (< and >).\n\nLOAD XML acts as the complement of running the mysql client in XML\noutput mode (that is, starting the client with the --xml option). To\nwrite data from a table to an XML file, use a command such as the\nfollowing one from the system shell:\n\nshell> mysql --xml -e \'SELECT * FROM mytable\' > file.xml\n\nTo read the file back into a table, use LOAD XML INFILE. By default,\nthe element is considered to be the equivalent of a database\ntable row; this can be changed using the ROWS IDENTIFIED BY clause.\n\nThis statement supports three different XML formats:\n\no Column names as attributes and column values as attribute values:\n\n\n\no Column names as tags and column values as the content of these tags:\n\n\n value1\n value2\n\n\no Column names are the name attributes of tags, and values are\n the contents of these tags:\n\n\n value1\n value2\n\n\n This is the format used by other MySQL tools, such as mysqldump.\n\nAll 3 formats can be used in the same XML file; the import routine\nautomatically detects the format for each row and interprets it\ncorrectly. Tags are matched based on the tag or attribute name and the\ncolumn name.\n\nThe following clauses work essentially the same way for LOAD XML as\nthey do for LOAD DATA:\n\no LOW_PRIORITY or CONCURRENT\n\no LOCAL\n\no REPLACE or IGNORE\n\no CHARACTER SET\n\no (column_or_user_var,...)\n\no SET\n\nSee [HELP LOAD DATA], for more information about these clauses.\n\nThe IGNORE number LINES or IGNORE number ROWS clause causes the first\nnumber rows in the XML file to be skipped. It is analogous to the LOAD\nDATA statement\'s IGNORE ... LINES clause.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/load-xml.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/load-xml.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (131,4,'CONV','Syntax:\nCONV(N,from_base,to_base)\n\nConverts numbers between different number bases. Returns a string\nrepresentation of the number N, converted from base from_base to base\nto_base. Returns NULL if any argument is NULL. The argument N is\ninterpreted as an integer, but may be specified as an integer or a\nstring. The minimum base is 2 and the maximum base is 36. If to_base is\na negative number, N is regarded as a signed number. Otherwise, N is\ntreated as unsigned. CONV() works with 64-bit precision.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html\n\n','mysql> SELECT CONV(\'a\',16,2);\n -> \'1010\'\nmysql> SELECT CONV(\'6E\',18,8);\n -> \'172\'\nmysql> SELECT CONV(-17,10,-18);\n -> \'-H\'\nmysql> SELECT CONV(10+\'10\'+\'10\'+0xa,10,10);\n -> \'40\'\n','http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (132,22,'DATE','DATE\n\nA date. The supported range is \'1000-01-01\' to \'9999-12-31\'. MySQL\ndisplays DATE values in \'YYYY-MM-DD\' format, but permits assignment of\nvalues to DATE columns using either strings or numbers.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-type-overview.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (133,15,'ASSIGN-VALUE','Syntax:\n:=\n\nAssignment operator. Causes the user variable on the left hand side of\nthe operator to take on the value to its right. The value on the right\nhand side may be a literal value, another variable storing a value, or\nany legal expression that yields a scalar value, including the result\nof a query (provided that this value is a scalar value). You can\nperform multiple assignments in the same SET statement. You can perform\nmultiple assignments in the same statement-\n\nUnlike =, the := operator is never interpreted as a comparison\noperator. This means you can use := in any valid SQL statement (not\njust in SET statements) to assign a value to a variable.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/assignment-operators.html\n\n','mysql> SELECT @var1, @var2;\n -> NULL, NULL\nmysql> SELECT @var1 := 1, @var2;\n -> 1, NULL\nmysql> SELECT @var1, @var2;\n -> 1, NULL\nmysql> SELECT @var1, @var2 := @var1;\n -> 1, 1\nmysql> SELECT @var1, @var2;\n -> 1, 1\n\nmysql> SELECT @var1:=COUNT(*) FROM t1;\n -> 4\nmysql> SELECT @var1;\n -> 4\n','http://dev.mysql.com/doc/refman/5.5/en/assignment-operators.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (134,26,'SHOW OPEN TABLES','Syntax:\nSHOW OPEN TABLES [{FROM | IN} db_name]\n [LIKE \'pattern\' | WHERE expr]\n\nSHOW OPEN TABLES lists the non-TEMPORARY tables that are currently open\nin the table cache. See\nhttp://dev.mysql.com/doc/refman/5.5/en/table-cache.html. The FROM\nclause, if present, restricts the tables shown to those present in the\ndb_name database. The LIKE clause, if present, indicates which table\nnames to match. The WHERE clause can be given to select rows using more\ngeneral conditions, as discussed in\nhttp://dev.mysql.com/doc/refman/5.5/en/extended-show.html.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-open-tables.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/show-open-tables.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (135,31,'EXTRACT','Syntax:\nEXTRACT(unit FROM date)\n\nThe EXTRACT() function uses the same kinds of unit specifiers as\nDATE_ADD() or DATE_SUB(), but extracts parts from the date rather than\nperforming date arithmetic.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT EXTRACT(YEAR FROM \'2009-07-02\');\n -> 2009\nmysql> SELECT EXTRACT(YEAR_MONTH FROM \'2009-07-02 01:02:03\');\n -> 200907\nmysql> SELECT EXTRACT(DAY_MINUTE FROM \'2009-07-02 01:02:03\');\n -> 20102\nmysql> SELECT EXTRACT(MICROSECOND\n -> FROM \'2003-01-02 10:30:00.000123\');\n -> 123\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (136,12,'ENCRYPT','Syntax:\nENCRYPT(str[,salt])\n\nEncrypts str using the Unix crypt() system call and returns a binary\nstring. The salt argument must be a string with at least two characters\nor the result will be NULL. If no salt argument is given, a random\nvalue is used.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/encryption-functions.html\n\n','mysql> SELECT ENCRYPT(\'hello\');\n -> \'VxuFAJXVARROc\'\n','http://dev.mysql.com/doc/refman/5.5/en/encryption-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (137,26,'SHOW STATUS','Syntax:\nSHOW [GLOBAL | SESSION] STATUS\n [LIKE \'pattern\' | WHERE expr]\n\nSHOW STATUS provides server status information. This information also\ncan be obtained using the mysqladmin extended-status command. The LIKE\nclause, if present, indicates which variable names to match. The WHERE\nclause can be given to select rows using more general conditions, as\ndiscussed in http://dev.mysql.com/doc/refman/5.5/en/extended-show.html.\nThis statement does not require any privilege. It requires only the\nability to connect to the server.\nWith a LIKE clause, the statement displays only rows for those\nvariables with names that match the pattern:\n\nmysql> SHOW STATUS LIKE \'Key%\';\n+--------------------+----------+\n| Variable_name | Value |\n+--------------------+----------+\n| Key_blocks_used | 14955 |\n| Key_read_requests | 96854827 |\n| Key_reads | 162040 |\n| Key_write_requests | 7589728 |\n| Key_writes | 3813196 |\n+--------------------+----------+\n\nWith the GLOBAL modifier, SHOW STATUS displays the status values for\nall connections to MySQL. With SESSION, it displays the status values\nfor the current connection. If no modifier is present, the default is\nSESSION. LOCAL is a synonym for SESSION.\n\nSome status variables have only a global value. For these, you get the\nsame value for both GLOBAL and SESSION. The scope for each status\nvariable is listed at\nhttp://dev.mysql.com/doc/refman/5.5/en/server-status-variables.html.\n\nEach invocation of the SHOW STATUS statement uses an internal temporary\ntable and increments the global Created_tmp_tables value.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-status.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/show-status.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (138,37,'EXTRACTVALUE','Syntax:\nExtractValue(xml_frag, xpath_expr)\n\nExtractValue() takes two string arguments, a fragment of XML markup\nxml_frag and an XPath expression xpath_expr (also known as a locator);\nit returns the text (CDATA) of the first text node which is a child of\nthe elements or elements matched by the XPath expression. In MySQL 5.5,\nthe XPath expression can contain at most 127 characters. (This\nlimitation is lifted in MySQL 5.6.)\n\nUsing this function is the equivalent of performing a match using the\nxpath_expr after appending /text(). In other words,\nExtractValue(\'Sakila\', \'/a/b\') and\nExtractValue(\'Sakila\', \'/a/b/text()\') produce the same\nresult.\n\nIf multiple matches are found, the content of the first child text node\nof each matching element is returned (in the order matched) as a\nsingle, space-delimited string.\n\nIf no matching text node is found for the expression (including the\nimplicit /text())---for whatever reason, as long as xpath_expr is\nvalid, and xml_frag consists of elements which are properly nested and\nclosed---an empty string is returned. No distinction is made between a\nmatch on an empty element and no match at all. This is by design.\n\nIf you need to determine whether no matching element was found in\nxml_frag or such an element was found but contained no child text\nnodes, you should test the result of an expression that uses the XPath\ncount() function. For example, both of these statements return an empty\nstring, as shown here:\n\nmysql> SELECT ExtractValue(\'\', \'/a/b\');\n+-------------------------------------+\n| ExtractValue(\'\', \'/a/b\') |\n+-------------------------------------+\n| |\n+-------------------------------------+\n1 row in set (0.00 sec)\n\nmysql> SELECT ExtractValue(\'\', \'/a/b\');\n+-------------------------------------+\n| ExtractValue(\'\', \'/a/b\') |\n+-------------------------------------+\n| |\n+-------------------------------------+\n1 row in set (0.00 sec)\n\nHowever, you can determine whether there was actually a matching\nelement using the following:\n\nmysql> SELECT ExtractValue(\'\', \'count(/a/b)\');\n+-------------------------------------+\n| ExtractValue(\'\', \'count(/a/b)\') |\n+-------------------------------------+\n| 1 |\n+-------------------------------------+\n1 row in set (0.00 sec)\n\nmysql> SELECT ExtractValue(\'\', \'count(/a/b)\');\n+-------------------------------------+\n| ExtractValue(\'\', \'count(/a/b)\') |\n+-------------------------------------+\n| 0 |\n+-------------------------------------+\n1 row in set (0.01 sec)\n\n*Important*: ExtractValue() returns only CDATA, and does not return any\ntags that might be contained within a matching tag, nor any of their\ncontent (see the result returned as val1 in the following example).\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/xml-functions.html\n\n','mysql> SELECT\n -> ExtractValue(\'cccddd\', \'/a\') AS val1,\n -> ExtractValue(\'cccddd\', \'/a/b\') AS val2,\n -> ExtractValue(\'cccddd\', \'//b\') AS val3,\n -> ExtractValue(\'cccddd\', \'/b\') AS val4,\n -> ExtractValue(\'cccdddeee\', \'//b\') AS val5;\n\n+------+------+------+------+---------+\n| val1 | val2 | val3 | val4 | val5 |\n+------+------+------+------+---------+\n| ccc | ddd | ddd | | ddd eee |\n+------+------+------+------+---------+\n','http://dev.mysql.com/doc/refman/5.5/en/xml-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (139,12,'OLD_PASSWORD','Syntax:\nOLD_PASSWORD(str)\n\nOLD_PASSWORD() was added when the implementation of PASSWORD() was\nchanged in MySQL 4.1 to improve security. OLD_PASSWORD() returns the\nvalue of the pre-4.1 implementation of PASSWORD() as a string, and is\nintended to permit you to reset passwords for any pre-4.1 clients that\nneed to connect to your version 5.5 MySQL server without locking them\nout. See http://dev.mysql.com/doc/refman/5.5/en/password-hashing.html.\n\nAs of MySQL 5.5.3, the return value is a nonbinary string in the\nconnection character set. Before 5.5.3, the return value is a binary\nstring.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/encryption-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/encryption-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (140,37,'FORMAT','Syntax:\nFORMAT(X,D[,locale])\n\nFormats the number X to a format like \'#,###,###.##\', rounded to D\ndecimal places, and returns the result as a string. If D is 0, the\nresult has no decimal point or fractional part.\n\nThe optional third parameter enables a locale to be specified to be\nused for the result number\'s decimal point, thousands separator, and\ngrouping between separators. Permissible locale values are the same as\nthe legal values for the lc_time_names system variable (see\nhttp://dev.mysql.com/doc/refman/5.5/en/locale-support.html). If no\nlocale is specified, the default is \'en_US\'.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','mysql> SELECT FORMAT(12332.123456, 4);\n -> \'12,332.1235\'\nmysql> SELECT FORMAT(12332.1,4);\n -> \'12,332.1000\'\nmysql> SELECT FORMAT(12332.2,0);\n -> \'12,332\'\nmysql> SELECT FORMAT(12332.2,2,\'de_DE\');\n -> \'12.332,20\'\n','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (141,15,'||','Syntax:\nOR, ||\n\nLogical OR. When both operands are non-NULL, the result is 1 if any\noperand is nonzero, and 0 otherwise. With a NULL operand, the result is\n1 if the other operand is nonzero, and NULL otherwise. If both operands\nare NULL, the result is NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/logical-operators.html\n\n','mysql> SELECT 1 || 1;\n -> 1\nmysql> SELECT 1 || 0;\n -> 1\nmysql> SELECT 0 || 0;\n -> 0\nmysql> SELECT 0 || NULL;\n -> NULL\nmysql> SELECT 1 || NULL;\n -> 1\n','http://dev.mysql.com/doc/refman/5.5/en/logical-operators.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (142,37,'BIT_LENGTH','Syntax:\nBIT_LENGTH(str)\n\nReturns the length of the string str in bits.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','mysql> SELECT BIT_LENGTH(\'text\');\n -> 32\n','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (143,2,'EXTERIORRING','ExteriorRing(poly)\n\nReturns the exterior ring of the Polygon value poly as a LineString.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#polygon-property-functions\n\n','mysql> SET @poly =\n -> \'Polygon((0 0,0 3,3 3,3 0,0 0),(1 1,1 2,2 2,2 1,1 1))\';\nmysql> SELECT AsText(ExteriorRing(GeomFromText(@poly)));\n+-------------------------------------------+\n| AsText(ExteriorRing(GeomFromText(@poly))) |\n+-------------------------------------------+\n| LINESTRING(0 0,0 3,3 3,3 0,0 0) |\n+-------------------------------------------+\n','http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#polygon-property-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (144,32,'GEOMFROMWKB','GeomFromWKB(wkb[,srid]), GeometryFromWKB(wkb[,srid])\n\nConstructs a geometry value of any type using its WKB representation\nand SRID.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-wkb-functions\n\n','','http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-wkb-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (145,26,'SHOW SLAVE HOSTS','Syntax:\nSHOW SLAVE HOSTS\n\nDisplays a list of replication slaves currently registered with the\nmaster. (Before MySQL 5.5.3, only slaves started with the\n--report-host=host_name option are visible in this list.)\n\nThe list is displayed on any server (not just the master server). The\noutput looks like this:\n\nmysql> SHOW SLAVE HOSTS;\n+------------+-----------+------+-----------+\n| Server_id | Host | Port | Master_id |\n+------------+-----------+------+-----------+\n| 192168010 | iconnect2 | 3306 | 192168011 |\n| 1921680101 | athena | 3306 | 192168011 |\n+------------+-----------+------+-----------+\n\no Server_id: The unique server ID of the slave server, as configured in\n the server\'s option file, or on the command line with\n --server-id=value.\n\no Host: The host name of the slave server, as configured in the\n server\'s option file, or on the command line with\n --report-host=host_name. Note that this can differ from the machine\n name as configured in the operating system.\n\no Port: The port the slave server is listening on.\n\n In MySQL 5.5.23 and later, a zero in this column means that the slave\n port (--report-port) was not set. Prior to MySQL 5.5.23, 3306 was\n used as the default in such cases (Bug #13333431).\n\no Master_id: The unique server ID of the master server that the slave\n server is replicating from.\n\nSome MySQL versions report another variable, Rpl_recovery_rank. This\nvariable was never used, and was removed in MySQL 5.5.3. (Bug #13963)\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-slave-hosts.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/show-slave-hosts.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (146,8,'START TRANSACTION','Syntax:\nSTART TRANSACTION [WITH CONSISTENT SNAPSHOT]\nBEGIN [WORK]\nCOMMIT [WORK] [AND [NO] CHAIN] [[NO] RELEASE]\nROLLBACK [WORK] [AND [NO] CHAIN] [[NO] RELEASE]\nSET autocommit = {0 | 1}\n\nThese statements provide control over use of transactions:\n\no START TRANSACTION or BEGIN start a new transaction.\n\no COMMIT commits the current transaction, making its changes permanent.\n\no ROLLBACK rolls back the current transaction, canceling its changes.\n\no SET autocommit disables or enables the default autocommit mode for\n the current session.\n\nBy default, MySQL runs with autocommit mode enabled. This means that as\nsoon as you execute a statement that updates (modifies) a table, MySQL\nstores the update on disk to make it permanent. The change cannot be\nrolled back.\n\nTo disable autocommit mode implicitly for a single series of\nstatements, use the START TRANSACTION statement:\n\nSTART TRANSACTION;\nSELECT @A:=SUM(salary) FROM table1 WHERE type=1;\nUPDATE table2 SET summary=@A WHERE type=1;\nCOMMIT;\n\nWith START TRANSACTION, autocommit remains disabled until you end the\ntransaction with COMMIT or ROLLBACK. The autocommit mode then reverts\nto its previous state.\n\nYou can also begin a transaction like this:\n\nSTART TRANSACTION WITH CONSISTENT SNAPSHOT;\n\nThe WITH CONSISTENT SNAPSHOT option starts a consistent read for\nstorage engines that are capable of it. This applies only to InnoDB.\nThe effect is the same as issuing a START TRANSACTION followed by a\nSELECT from any InnoDB table. See\nhttp://dev.mysql.com/doc/refman/5.5/en/innodb-consistent-read.html. The\nWITH CONSISTENT SNAPSHOT option does not change the current transaction\nisolation level, so it provides a consistent snapshot only if the\ncurrent isolation level is one that permits consistent read (REPEATABLE\nREAD or SERIALIZABLE).\n\n*Important*: Many APIs used for writing MySQL client applications (such\nas JDBC) provide their own methods for starting transactions that can\n(and sometimes should) be used instead of sending a START TRANSACTION\nstatement from the client. See\nhttp://dev.mysql.com/doc/refman/5.5/en/connectors-apis.html, or the\ndocumentation for your API, for more information.\n\nTo disable autocommit mode explicitly, use the following statement:\n\nSET autocommit=0;\n\nAfter disabling autocommit mode by setting the autocommit variable to\nzero, changes to transaction-safe tables (such as those for InnoDB or\nNDBCLUSTER) are not made permanent immediately. You must use COMMIT to\nstore your changes to disk or ROLLBACK to ignore the changes.\n\nautocommit is a session variable and must be set for each session. To\ndisable autocommit mode for each new connection, see the description of\nthe autocommit system variable at\nhttp://dev.mysql.com/doc/refman/5.5/en/server-system-variables.html.\n\nBEGIN and BEGIN WORK are supported as aliases of START TRANSACTION for\ninitiating a transaction. START TRANSACTION is standard SQL syntax and\nis the recommended way to start an ad-hoc transaction.\n\nThe BEGIN statement differs from the use of the BEGIN keyword that\nstarts a BEGIN ... END compound statement. The latter does not begin a\ntransaction. See [HELP BEGIN END].\n\n*Note*: Within all stored programs (stored procedures and functions,\ntriggers, and events), the parser treats BEGIN [WORK] as the beginning\nof a BEGIN ... END block. Begin a transaction in this context with\nSTART TRANSACTION instead.\n\nThe optional WORK keyword is supported for COMMIT and ROLLBACK, as are\nthe CHAIN and RELEASE clauses. CHAIN and RELEASE can be used for\nadditional control over transaction completion. The value of the\ncompletion_type system variable determines the default completion\nbehavior. See\nhttp://dev.mysql.com/doc/refman/5.5/en/server-system-variables.html.\n\nThe AND CHAIN clause causes a new transaction to begin as soon as the\ncurrent one ends, and the new transaction has the same isolation level\nas the just-terminated transaction. The RELEASE clause causes the\nserver to disconnect the current client session after terminating the\ncurrent transaction. Including the NO keyword suppresses CHAIN or\nRELEASE completion, which can be useful if the completion_type system\nvariable is set to cause chaining or release completion by default.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/commit.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/commit.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (147,18,'BETWEEN AND','Syntax:\nexpr BETWEEN min AND max\n\nIf expr is greater than or equal to min and expr is less than or equal\nto max, BETWEEN returns 1, otherwise it returns 0. This is equivalent\nto the expression (min <= expr AND expr <= max) if all the arguments\nare of the same type. Otherwise type conversion takes place according\nto the rules described in\nhttp://dev.mysql.com/doc/refman/5.5/en/type-conversion.html, but\napplied to all the three arguments.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html\n\n','mysql> SELECT 2 BETWEEN 1 AND 3, 2 BETWEEN 3 and 1;\n -> 1, 0\nmysql> SELECT 1 BETWEEN 2 AND 3;\n -> 0\nmysql> SELECT \'b\' BETWEEN \'a\' AND \'c\';\n -> 1\nmysql> SELECT 2 BETWEEN 2 AND \'3\';\n -> 1\nmysql> SELECT 2 BETWEEN 2 AND \'x-3\';\n -> 0\n','http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (148,24,'MULTIPOLYGON','MultiPolygon(poly1,poly2,...)\n\nConstructs a MultiPolygon value from a set of Polygon or WKB Polygon\narguments.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-mysql-specific-functions\n\n','','http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-mysql-specific-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (149,31,'TIME_FORMAT','Syntax:\nTIME_FORMAT(time,format)\n\nThis is used like the DATE_FORMAT() function, but the format string may\ncontain format specifiers only for hours, minutes, seconds, and\nmicroseconds. Other specifiers produce a NULL value or 0.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT TIME_FORMAT(\'100:00:00\', \'%H %k %h %I %l\');\n -> \'100 100 04 04 4\'\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (150,37,'LEFT','Syntax:\nLEFT(str,len)\n\nReturns the leftmost len characters from the string str, or NULL if any\nargument is NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','mysql> SELECT LEFT(\'foobarbar\', 5);\n -> \'fooba\'\n','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (151,26,'FLUSH QUERY CACHE','You can defragment the query cache to better utilize its memory with\nthe FLUSH QUERY CACHE statement. The statement does not remove any\nqueries from the cache.\n\nThe RESET QUERY CACHE statement removes all query results from the\nquery cache. The FLUSH TABLES statement also does this.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/query-cache-status-and-maintenance.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/query-cache-status-and-maintenance.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (152,22,'SET DATA TYPE','SET(\'value1\',\'value2\',...) [CHARACTER SET charset_name] [COLLATE\ncollation_name]\n\nA set. A string object that can have zero or more values, each of which\nmust be chosen from the list of values \'value1\', \'value2\', ... A SET\ncolumn can have a maximum of 64 members. SET values are represented\ninternally as integers.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/string-type-overview.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (153,4,'RAND','Syntax:\nRAND(), RAND(N)\n\nReturns a random floating-point value v in the range 0 <= v < 1.0. If a\nconstant integer argument N is specified, it is used as the seed value,\nwhich produces a repeatable sequence of column values. In the following\nexample, note that the sequences of values produced by RAND(3) is the\nsame both places where it occurs.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html\n\n','mysql> CREATE TABLE t (i INT);\nQuery OK, 0 rows affected (0.42 sec)\n\nmysql> INSERT INTO t VALUES(1),(2),(3);\nQuery OK, 3 rows affected (0.00 sec)\nRecords: 3 Duplicates: 0 Warnings: 0\n\nmysql> SELECT i, RAND() FROM t;\n+------+------------------+\n| i | RAND() |\n+------+------------------+\n| 1 | 0.61914388706828 |\n| 2 | 0.93845168309142 |\n| 3 | 0.83482678498591 |\n+------+------------------+\n3 rows in set (0.00 sec)\n\nmysql> SELECT i, RAND(3) FROM t;\n+------+------------------+\n| i | RAND(3) |\n+------+------------------+\n| 1 | 0.90576975597606 |\n| 2 | 0.37307905813035 |\n| 3 | 0.14808605345719 |\n+------+------------------+\n3 rows in set (0.00 sec)\n\nmysql> SELECT i, RAND() FROM t;\n+------+------------------+\n| i | RAND() |\n+------+------------------+\n| 1 | 0.35877890638893 |\n| 2 | 0.28941420772058 |\n| 3 | 0.37073435016976 |\n+------+------------------+\n3 rows in set (0.00 sec)\n\nmysql> SELECT i, RAND(3) FROM t;\n+------+------------------+\n| i | RAND(3) |\n+------+------------------+\n| 1 | 0.90576975597606 |\n| 2 | 0.37307905813035 |\n| 3 | 0.14808605345719 |\n+------+------------------+\n3 rows in set (0.01 sec)\n','http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (154,37,'RPAD','Syntax:\nRPAD(str,len,padstr)\n\nReturns the string str, right-padded with the string padstr to a length\nof len characters. If str is longer than len, the return value is\nshortened to len characters.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','mysql> SELECT RPAD(\'hi\',5,\'?\');\n -> \'hi???\'\nmysql> SELECT RPAD(\'hi\',1,\'?\');\n -> \'h\'\n','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (155,39,'CREATE DATABASE','Syntax:\nCREATE {DATABASE | SCHEMA} [IF NOT EXISTS] db_name\n [create_specification] ...\n\ncreate_specification:\n [DEFAULT] CHARACTER SET [=] charset_name\n | [DEFAULT] COLLATE [=] collation_name\n\nCREATE DATABASE creates a database with the given name. To use this\nstatement, you need the CREATE privilege for the database. CREATE\nSCHEMA is a synonym for CREATE DATABASE.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/create-database.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/create-database.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (156,22,'DEC','DEC[(M[,D])] [UNSIGNED] [ZEROFILL], NUMERIC[(M[,D])] [UNSIGNED]\n[ZEROFILL], FIXED[(M[,D])] [UNSIGNED] [ZEROFILL]\n\nThese types are synonyms for DECIMAL. The FIXED synonym is available\nfor compatibility with other database systems.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/numeric-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/numeric-type-overview.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (157,16,'VAR_POP','Syntax:\nVAR_POP(expr)\n\nReturns the population standard variance of expr. It considers rows as\nthe whole population, not as a sample, so it has the number of rows as\nthe denominator. You can also use VARIANCE(), which is equivalent but\nis not standard SQL.\n\nVAR_POP() returns NULL if there were no matching rows.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/group-by-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/group-by-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (158,37,'ELT','Syntax:\nELT(N,str1,str2,str3,...)\n\nReturns str1 if N = 1, str2 if N = 2, and so on. Returns NULL if N is\nless than 1 or greater than the number of arguments. ELT() is the\ncomplement of FIELD().\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','mysql> SELECT ELT(1, \'ej\', \'Heja\', \'hej\', \'foo\');\n -> \'ej\'\nmysql> SELECT ELT(4, \'ej\', \'Heja\', \'hej\', \'foo\');\n -> \'foo\'\n','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (159,39,'ALTER VIEW','Syntax:\nALTER\n [ALGORITHM = {UNDEFINED | MERGE | TEMPTABLE}]\n [DEFINER = { user | CURRENT_USER }]\n [SQL SECURITY { DEFINER | INVOKER }]\n VIEW view_name [(column_list)]\n AS select_statement\n [WITH [CASCADED | LOCAL] CHECK OPTION]\n\nThis statement changes the definition of a view, which must exist. The\nsyntax is similar to that for CREATE VIEW and the effect is the same as\nfor CREATE OR REPLACE VIEW. See [HELP CREATE VIEW]. This statement\nrequires the CREATE VIEW and DROP privileges for the view, and some\nprivilege for each column referred to in the SELECT statement. ALTER\nVIEW is permitted only to the definer or users with the SUPER\nprivilege.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/alter-view.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/alter-view.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (160,26,'SHOW DATABASES','Syntax:\nSHOW {DATABASES | SCHEMAS}\n [LIKE \'pattern\' | WHERE expr]\n\nSHOW DATABASES lists the databases on the MySQL server host. SHOW\nSCHEMAS is a synonym for SHOW DATABASES. The LIKE clause, if present,\nindicates which database names to match. The WHERE clause can be given\nto select rows using more general conditions, as discussed in\nhttp://dev.mysql.com/doc/refman/5.5/en/extended-show.html.\n\nYou see only those databases for which you have some kind of privilege,\nunless you have the global SHOW DATABASES privilege. You can also get\nthis list using the mysqlshow command.\n\nIf the server was started with the --skip-show-database option, you\ncannot use this statement at all unless you have the SHOW DATABASES\nprivilege.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-databases.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/show-databases.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (161,19,'~','Syntax:\n~\n\nInvert all bits.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/bit-functions.html\n\n','mysql> SELECT 5 & ~1;\n -> 4\n','http://dev.mysql.com/doc/refman/5.5/en/bit-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (162,22,'TEXT','TEXT[(M)] [CHARACTER SET charset_name] [COLLATE collation_name]\n\nA TEXT column with a maximum length of 65,535 (216 - 1) characters. The\neffective maximum length is less if the value contains multi-byte\ncharacters. Each TEXT value is stored using a 2-byte length prefix that\nindicates the number of bytes in the value.\n\nAn optional length M can be given for this type. If this is done, MySQL\ncreates the column as the smallest TEXT type large enough to hold\nvalues M characters long.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/string-type-overview.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (163,37,'CONCAT_WS','Syntax:\nCONCAT_WS(separator,str1,str2,...)\n\nCONCAT_WS() stands for Concatenate With Separator and is a special form\nof CONCAT(). The first argument is the separator for the rest of the\narguments. The separator is added between the strings to be\nconcatenated. The separator can be a string, as can the rest of the\narguments. If the separator is NULL, the result is NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','mysql> SELECT CONCAT_WS(\',\',\'First name\',\'Second name\',\'Last Name\');\n -> \'First name,Second name,Last Name\'\nmysql> SELECT CONCAT_WS(\',\',\'First name\',NULL,\'Last Name\');\n -> \'First name,Last Name\'\n','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (164,17,'ROW_COUNT','Syntax:\nROW_COUNT()\n\nBefore MySQL 5.5.5, ROW_COUNT() returns the number of rows changed,\ndeleted, or inserted by the last statement if it was an UPDATE, DELETE,\nor INSERT. For other statements, the value may not be meaningful.\n\nAs of MySQL 5.5.5, ROW_COUNT() returns a value as follows:\n\no DDL statements: 0. This applies to statements such as CREATE TABLE or\n DROP TABLE.\n\no DML statements other than SELECT: The number of affected rows. This\n applies to statements such as UPDATE, INSERT, or DELETE (as before),\n but now also to statements such as ALTER TABLE and LOAD DATA INFILE.\n\no SELECT: -1 if the statement returns a result set, or the number of\n rows "affected" if it does not. For example, for SELECT * FROM t1,\n ROW_COUNT() returns -1. For SELECT * FROM t1 INTO OUTFILE\n \'file_name\', ROW_COUNT() returns the number of rows written to the\n file.\n\no SIGNAL statements: 0.\n\nFor UPDATE statements, the affected-rows value by default is the number\nof rows actually changed. If you specify the CLIENT_FOUND_ROWS flag to\nmysql_real_connect() when connecting to mysqld, the affected-rows value\nis the number of rows "found"; that is, matched by the WHERE clause.\n\nFor REPLACE statements, the affected-rows value is 2 if the new row\nreplaced an old row, because in this case, one row was inserted after\nthe duplicate was deleted.\n\nFor INSERT ... ON DUPLICATE KEY UPDATE statements, the affected-rows\nvalue is 1 if the row is inserted as a new row and 2 if an existing row\nis updated.\n\nThe ROW_COUNT() value is similar to the value from the\nmysql_affected_rows() C API function and the row count that the mysql\nclient displays following statement execution.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/information-functions.html\n\n','mysql> INSERT INTO t VALUES(1),(2),(3);\nQuery OK, 3 rows affected (0.00 sec)\nRecords: 3 Duplicates: 0 Warnings: 0\n\nmysql> SELECT ROW_COUNT();\n+-------------+\n| ROW_COUNT() |\n+-------------+\n| 3 |\n+-------------+\n1 row in set (0.00 sec)\n\nmysql> DELETE FROM t WHERE i IN(1,2);\nQuery OK, 2 rows affected (0.00 sec)\n\nmysql> SELECT ROW_COUNT();\n+-------------+\n| ROW_COUNT() |\n+-------------+\n| 2 |\n+-------------+\n1 row in set (0.00 sec)\n','http://dev.mysql.com/doc/refman/5.5/en/information-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (165,4,'ASIN','Syntax:\nASIN(X)\n\nReturns the arc sine of X, that is, the value whose sine is X. Returns\nNULL if X is not in the range -1 to 1.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html\n\n','mysql> SELECT ASIN(0.2);\n -> 0.20135792079033\nmysql> SELECT ASIN(\'foo\');\n\n+-------------+\n| ASIN(\'foo\') |\n+-------------+\n| 0 |\n+-------------+\n1 row in set, 1 warning (0.00 sec)\n\nmysql> SHOW WARNINGS;\n+---------+------+-----------------------------------------+\n| Level | Code | Message |\n+---------+------+-----------------------------------------+\n| Warning | 1292 | Truncated incorrect DOUBLE value: \'foo\' |\n+---------+------+-----------------------------------------+\n','http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (166,4,'SIGN','Syntax:\nSIGN(X)\n\nReturns the sign of the argument as -1, 0, or 1, depending on whether X\nis negative, zero, or positive.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html\n\n','mysql> SELECT SIGN(-32);\n -> -1\nmysql> SELECT SIGN(0);\n -> 0\nmysql> SELECT SIGN(234);\n -> 1\n','http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (167,31,'SEC_TO_TIME','Syntax:\nSEC_TO_TIME(seconds)\n\nReturns the seconds argument, converted to hours, minutes, and seconds,\nas a TIME value. The range of the result is constrained to that of the\nTIME data type. A warning occurs if the argument corresponds to a value\noutside that range.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT SEC_TO_TIME(2378);\n -> \'00:39:38\'\nmysql> SELECT SEC_TO_TIME(2378) + 0;\n -> 3938\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (168,22,'FLOAT','FLOAT[(M,D)] [UNSIGNED] [ZEROFILL]\n\nA small (single-precision) floating-point number. Permissible values\nare -3.402823466E+38 to -1.175494351E-38, 0, and 1.175494351E-38 to\n3.402823466E+38. These are the theoretical limits, based on the IEEE\nstandard. The actual range might be slightly smaller depending on your\nhardware or operating system.\n\nM is the total number of digits and D is the number of digits following\nthe decimal point. If M and D are omitted, values are stored to the\nlimits permitted by the hardware. A single-precision floating-point\nnumber is accurate to approximately 7 decimal places.\n\nUNSIGNED, if specified, disallows negative values.\n\nUsing FLOAT might give you some unexpected problems because all\ncalculations in MySQL are done with double precision. See\nhttp://dev.mysql.com/doc/refman/5.5/en/no-matching-rows.html.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/numeric-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/numeric-type-overview.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (169,37,'LOCATE','Syntax:\nLOCATE(substr,str), LOCATE(substr,str,pos)\n\nThe first syntax returns the position of the first occurrence of\nsubstring substr in string str. The second syntax returns the position\nof the first occurrence of substring substr in string str, starting at\nposition pos. Returns 0 if substr is not in str.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','mysql> SELECT LOCATE(\'bar\', \'foobarbar\');\n -> 4\nmysql> SELECT LOCATE(\'xbar\', \'foobar\');\n -> 0\nmysql> SELECT LOCATE(\'bar\', \'foobarbar\', 5);\n -> 7\n','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (170,26,'SHOW EVENTS','Syntax:\nSHOW EVENTS [{FROM | IN} schema_name]\n [LIKE \'pattern\' | WHERE expr]\n\nThis statement displays information about Event Manager events. It\nrequires the EVENT privilege for the database from which the events are\nto be shown.\n\nIn its simplest form, SHOW EVENTS lists all of the events in the\ncurrent schema:\n\nmysql> SELECT CURRENT_USER(), SCHEMA();\n+----------------+----------+\n| CURRENT_USER() | SCHEMA() |\n+----------------+----------+\n| jon@ghidora | myschema |\n+----------------+----------+\n1 row in set (0.00 sec)\n\nmysql> SHOW EVENTS\\G\n*************************** 1. row ***************************\n Db: myschema\n Name: e_daily\n Definer: jon@ghidora\n Time zone: SYSTEM\n Type: RECURRING\n Execute at: NULL\n Interval value: 10\n Interval field: SECOND\n Starts: 2006-02-09 10:41:23\n Ends: NULL\n Status: ENABLED\n Originator: 0\ncharacter_set_client: latin1\ncollation_connection: latin1_swedish_ci\n Database Collation: latin1_swedish_ci\n\nTo see events for a specific schema, use the FROM clause. For example,\nto see events for the test schema, use the following statement:\n\nSHOW EVENTS FROM test;\n\nThe LIKE clause, if present, indicates which event names to match. The\nWHERE clause can be given to select rows using more general conditions,\nas discussed in\nhttp://dev.mysql.com/doc/refman/5.5/en/extended-show.html.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-events.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/show-events.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (171,17,'CHARSET','Syntax:\nCHARSET(str)\n\nReturns the character set of the string argument.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/information-functions.html\n\n','mysql> SELECT CHARSET(\'abc\');\n -> \'latin1\'\nmysql> SELECT CHARSET(CONVERT(\'abc\' USING utf8));\n -> \'utf8\'\nmysql> SELECT CHARSET(USER());\n -> \'utf8\'\n','http://dev.mysql.com/doc/refman/5.5/en/information-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (172,31,'SUBDATE','Syntax:\nSUBDATE(date,INTERVAL expr unit), SUBDATE(expr,days)\n\nWhen invoked with the INTERVAL form of the second argument, SUBDATE()\nis a synonym for DATE_SUB(). For information on the INTERVAL unit\nargument, see the discussion for DATE_ADD().\n\nmysql> SELECT DATE_SUB(\'2008-01-02\', INTERVAL 31 DAY);\n -> \'2007-12-02\'\nmysql> SELECT SUBDATE(\'2008-01-02\', INTERVAL 31 DAY);\n -> \'2007-12-02\'\n\nThe second form enables the use of an integer value for days. In such\ncases, it is interpreted as the number of days to be subtracted from\nthe date or datetime expression expr.\n\nmysql> SELECT SUBDATE(\'2008-01-02 12:00:00\', 31);\n -> \'2007-12-02 12:00:00\'\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (173,31,'DAYOFYEAR','Syntax:\nDAYOFYEAR(date)\n\nReturns the day of the year for date, in the range 1 to 366.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT DAYOFYEAR(\'2007-02-03\');\n -> 34\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (174,4,'%','Syntax:\nN % M, N MOD M\n\nModulo operation. Returns the remainder of N divided by M. For more\ninformation, see the description for the MOD() function in\nhttp://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/arithmetic-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/arithmetic-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (175,22,'LONGTEXT','LONGTEXT [CHARACTER SET charset_name] [COLLATE collation_name]\n\nA TEXT column with a maximum length of 4,294,967,295 or 4GB (232 - 1)\ncharacters. The effective maximum length is less if the value contains\nmulti-byte characters. The effective maximum length of LONGTEXT columns\nalso depends on the configured maximum packet size in the client/server\nprotocol and available memory. Each LONGTEXT value is stored using a\n4-byte length prefix that indicates the number of bytes in the value.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/string-type-overview.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (176,26,'KILL','Syntax:\nKILL [CONNECTION | QUERY] thread_id\n\nEach connection to mysqld runs in a separate thread. You can see which\nthreads are running with the SHOW PROCESSLIST statement and kill a\nthread with the KILL thread_id statement.\n\nKILL permits an optional CONNECTION or QUERY modifier:\n\no KILL CONNECTION is the same as KILL with no modifier: It terminates\n the connection associated with the given thread_id.\n\no KILL QUERY terminates the statement that the connection is currently\n executing, but leaves the connection itself intact.\n\nIf you have the PROCESS privilege, you can see all threads. If you have\nthe SUPER privilege, you can kill all threads and statements.\nOtherwise, you can see and kill only your own threads and statements.\n\nYou can also use the mysqladmin processlist and mysqladmin kill\ncommands to examine and kill threads.\n\n*Note*: You cannot use KILL with the Embedded MySQL Server library\nbecause the embedded server merely runs inside the threads of the host\napplication. It does not create any connection threads of its own.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/kill.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/kill.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (177,30,'DISJOINT','Disjoint(g1,g2)\n\nReturns 1 or 0 to indicate whether g1 is spatially disjoint from (does\nnot intersect) g2.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/functions-for-testing-spatial-relations-between-geometric-objects.html#functions-that-test-spatial-relationships-between-geometries\n\n','','http://dev.mysql.com/doc/refman/5.5/en/functions-for-testing-spatial-relations-between-geometric-objects.html#functions-that-test-spatial-relationships-between-geometries'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (178,3,'ASTEXT','AsText(g), AsWKT(g)\n\nConverts a value in internal geometry format to its WKT representation\nand returns the string result.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/functions-to-convert-geometries-between-formats.html\n\n','mysql> SET @g = \'LineString(1 1,2 2,3 3)\';\nmysql> SELECT AsText(GeomFromText(@g));\n+--------------------------+\n| AsText(GeomFromText(@g)) |\n+--------------------------+\n| LINESTRING(1 1,2 2,3 3) |\n+--------------------------+\n','http://dev.mysql.com/doc/refman/5.5/en/functions-to-convert-geometries-between-formats.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (179,37,'LPAD','Syntax:\nLPAD(str,len,padstr)\n\nReturns the string str, left-padded with the string padstr to a length\nof len characters. If str is longer than len, the return value is\nshortened to len characters.\n\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','mysql> SELECT LPAD(\'hi\',4,\'??\');\n -> \'??hi\'\nmysql> SELECT LPAD(\'hi\',1,\'??\');\n -> \'h\'\n','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (180,23,'DECLARE CONDITION','Syntax:\nDECLARE condition_name CONDITION FOR condition_value\n\ncondition_value:\n mysql_error_code\n | SQLSTATE [VALUE] sqlstate_value\n\nThe DECLARE ... CONDITION statement declares a named error condition,\nassociating a name with a condition that needs specific handling. The\nname can be referred to in a subsequent DECLARE ... HANDLER statement\n(see [HELP DECLARE HANDLER]).\n\nCondition declarations must appear before cursor or handler\ndeclarations.\n\nThe condition_value for DECLARE ... CONDITION can be a MySQL error code\n(a number) or an SQLSTATE value (a 5-character string literal). You\nshould not use MySQL error code 0 or SQLSTATE values that begin with\n\'00\', because those indicate success rather than an error condition.\nFor a list of MySQL error codes and SQLSTATE values, see\nhttp://dev.mysql.com/doc/refman/5.5/en/error-messages-server.html.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/declare-condition.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/declare-condition.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (181,30,'OVERLAPS','Overlaps(g1,g2)\n\nReturns 1 or 0 to indicate whether g1 spatially overlaps g2. The term\nspatially overlaps is used if two geometries intersect and their\nintersection results in a geometry of the same dimension but not equal\nto either of the given geometries.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/functions-for-testing-spatial-relations-between-geometric-objects.html#functions-that-test-spatial-relationships-between-geometries\n\n','','http://dev.mysql.com/doc/refman/5.5/en/functions-for-testing-spatial-relations-between-geometric-objects.html#functions-that-test-spatial-relationships-between-geometries'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (182,8,'SET GLOBAL SQL_SLAVE_SKIP_COUNTER','Syntax:\nSET GLOBAL sql_slave_skip_counter = N\n\nThis statement skips the next N events from the master. This is useful\nfor recovering from replication stops caused by a statement.\n\nThis statement is valid only when the slave threads are not running.\nOtherwise, it produces an error.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/set-global-sql-slave-skip-counter.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/set-global-sql-slave-skip-counter.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (183,25,'NUMGEOMETRIES','NumGeometries(gc)\n\nReturns the number of geometries in the GeometryCollection value gc.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#geometrycollection-property-functions\n\n','mysql> SET @gc = \'GeometryCollection(Point(1 1),LineString(2 2, 3 3))\';\nmysql> SELECT NumGeometries(GeomFromText(@gc));\n+----------------------------------+\n| NumGeometries(GeomFromText(@gc)) |\n+----------------------------------+\n| 2 |\n+----------------------------------+\n','http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#geometrycollection-property-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (184,31,'MONTHNAME','Syntax:\nMONTHNAME(date)\n\nReturns the full name of the month for date. The language used for the\nname is controlled by the value of the lc_time_names system variable\n(http://dev.mysql.com/doc/refman/5.5/en/locale-support.html).\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT MONTHNAME(\'2008-02-03\');\n -> \'February\'\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (185,8,'CHANGE MASTER TO','Syntax:\nCHANGE MASTER TO option [, option] ...\n\noption:\n MASTER_BIND = \'interface_name\'\n | MASTER_HOST = \'host_name\'\n | MASTER_USER = \'user_name\'\n | MASTER_PASSWORD = \'password\'\n | MASTER_PORT = port_num\n | MASTER_CONNECT_RETRY = interval\n | MASTER_HEARTBEAT_PERIOD = interval\n | MASTER_LOG_FILE = \'master_log_name\'\n | MASTER_LOG_POS = master_log_pos\n | RELAY_LOG_FILE = \'relay_log_name\'\n | RELAY_LOG_POS = relay_log_pos\n | MASTER_SSL = {0|1}\n | MASTER_SSL_CA = \'ca_file_name\'\n | MASTER_SSL_CAPATH = \'ca_directory_name\'\n | MASTER_SSL_CERT = \'cert_file_name\'\n | MASTER_SSL_KEY = \'key_file_name\'\n | MASTER_SSL_CIPHER = \'cipher_list\'\n | MASTER_SSL_VERIFY_SERVER_CERT = {0|1}\n | IGNORE_SERVER_IDS = (server_id_list)\n\nserver_id_list:\n [server_id [, server_id] ... ]\n\nCHANGE MASTER TO changes the parameters that the slave server uses for\nconnecting to the master server, for reading the master binary log, and\nreading the slave relay log. It also updates the contents of the\nmaster.info and relay-log.info files. To use CHANGE MASTER TO, the\nslave replication threads must be stopped (use STOP SLAVE if\nnecessary).\n\nOptions not specified retain their value, except as indicated in the\nfollowing discussion. Thus, in most cases, there is no need to specify\noptions that do not change. For example, if the password to connect to\nyour MySQL master has changed, you just need to issue these statements\nto tell the slave about the new password:\n\nSTOP SLAVE; -- if replication was running\nCHANGE MASTER TO MASTER_PASSWORD=\'new3cret\';\nSTART SLAVE; -- if you want to restart replication\n\nMASTER_HOST, MASTER_USER, MASTER_PASSWORD, and MASTER_PORT provide\ninformation to the slave about how to connect to its master:\n\no MASTER_HOST and MASTER_PORT are the host name (or IP address) of the\n master host and its TCP/IP port.\n\n *Note*: Replication cannot use Unix socket files. You must be able to\n connect to the master MySQL server using TCP/IP.\n\n If you specify the MASTER_HOST or MASTER_PORT option, the slave\n assumes that the master server is different from before (even if the\n option value is the same as its current value.) In this case, the old\n values for the master binary log file name and position are\n considered no longer applicable, so if you do not specify\n MASTER_LOG_FILE and MASTER_LOG_POS in the statement,\n MASTER_LOG_FILE=\'\' and MASTER_LOG_POS=4 are silently appended to it.\n\n Setting MASTER_HOST=\'\' (that is, setting its value explicitly to an\n empty string) is not the same as not setting MASTER_HOST at all.\n Beginning with MySQL 5.5, trying to set MASTER_HOST to an empty\n string fails with an error. Previously, setting MASTER_HOST to an\n empty string caused START SLAVE subsequently to fail. (Bug #28796)\n\no MASTER_USER and MASTER_PASSWORD are the user name and password of the\n account to use for connecting to the master.\n\n In MySQL 5.5.20 and later, MASTER_USER cannot be made empty; setting\n MASTER_USER = \'\' or leaving it unset when setting a value for for\n MASTER_PASSWORD causes an error (Bug #13427949).\n\n Currently, a password used for a replication slave account is\n effectively limited to 32 characters in length; the password can be\n longer, but any excess characters are truncated. This is not due to\n any limit imposed by the MySQL Server generally, but rather is an\n issue specific to MySQL Replication. (For more information, see Bug\n #43439.)\n\n The text of a running CHANGE MASTER TO statement, including values\n for MASTER_USER and MASTER_PASSWORD, can be seen in the output of a\n concurrent SHOW PROCESSLIST statement.\n\nThe MASTER_SSL_xxx options provide information about using SSL for the\nconnection. They correspond to the --ssl-xxx options described in\nhttp://dev.mysql.com/doc/refman/5.5/en/ssl-options.html, and\nhttp://dev.mysql.com/doc/refman/5.5/en/replication-solutions-ssl.html.\nThese options can be changed even on slaves that are compiled without\nSSL support. They are saved to the master.info file, but are ignored if\nthe slave does not have SSL support enabled.\n\nMASTER_CONNECT_RETRY specifies how many seconds to wait between connect\nretries. The default is 60. The number of reconnection attempts is\nlimited by the --master-retry-count server option; for more\ninformation, see\nhttp://dev.mysql.com/doc/refman/5.5/en/replication-options.html.\n\nThe MASTER_BIND option is available in MySQL Cluster NDB 7.2 and later,\nbut is not supported in mainline MySQL 5.5.\n\nMASTER_BIND is for use on replication slaves having multiple network\ninterfaces, and determines which of the slave\'s network interfaces is\nchosen for connecting to the master.\n\nMASTER_HEARTBEAT_PERIOD sets the interval in seconds between\nreplication heartbeats. Whenever the master\'s binary log is updated\nwith an event, the waiting period for the next heartbeat is reset.\ninterval is a decimal value having the range 0 to 4294967 seconds and a\nresolution in milliseconds; the smallest nonzero value is 0.001.\nHeartbeats are sent by the master only if there are no unsent events in\nthe binary log file for a period longer than interval.\n\nSetting interval to 0 disables heartbeats altogether. The default value\nfor interval is equal to the value of slave_net_timeout divided by 2.\n\nSetting @@global.slave_net_timeout to a value less than that of the\ncurrent heartbeat interval results in a warning being issued. The\neffect of issuing RESET SLAVE on the heartbeat interval is to reset it\nto the default value.\n\nMASTER_LOG_FILE and MASTER_LOG_POS are the coordinates at which the\nslave I/O thread should begin reading from the master the next time the\nthread starts. RELAY_LOG_FILE and RELAY_LOG_POS are the coordinates at\nwhich the slave SQL thread should begin reading from the relay log the\nnext time the thread starts. If you specify either of MASTER_LOG_FILE\nor MASTER_LOG_POS, you cannot specify RELAY_LOG_FILE or RELAY_LOG_POS.\nIf neither of MASTER_LOG_FILE or MASTER_LOG_POS is specified, the slave\nuses the last coordinates of the slave SQL thread before CHANGE MASTER\nTO was issued. This ensures that there is no discontinuity in\nreplication, even if the slave SQL thread was late compared to the\nslave I/O thread, when you merely want to change, say, the password to\nuse.\n\nCHANGE MASTER TO deletes all relay log files and starts a new one,\nunless you specify RELAY_LOG_FILE or RELAY_LOG_POS. In that case, relay\nlog files are kept; the relay_log_purge global variable is set silently\nto 0.\n\nPrior to MySQL 5.5, RELAY_LOG_FILE required an absolute path. In MySQL\n5.5, the path can be relative, in which case the path is assumed to be\nrelative to the slave\'s data directory. (Bug #12190)\n\nIGNORE_SERVER_IDS was added in MySQL 5.5. This option takes a\ncomma-separated list of 0 or more server IDs. Events originating from\nthe corresponding servers are ignored, with the exception of log\nrotation and deletion events, which are still recorded in the relay\nlog.\n\nIn circular replication, the originating server normally acts as the\nterminator of its own events, so that they are not applied more than\nonce. Thus, this option is useful in circular replication when one of\nthe servers in the circle is removed. Suppose that you have a circular\nreplication setup with 4 servers, having server IDs 1, 2, 3, and 4, and\nserver 3 fails. When bridging the gap by starting replication from\nserver 2 to server 4, you can include IGNORE_SERVER_IDS = (3) in the\nCHANGE MASTER TO statement that you issue on server 4 to tell it to use\nserver 2 as its master instead of server 3. Doing so causes it to\nignore and not to propagate any statements that originated with the\nserver that is no longer in use.\n\nIf a CHANGE MASTER TO statement is issued without any IGNORE_SERVER_IDS\noption, any existing list is preserved; RESET SLAVE also has no effect\non the server ID list. To clear the list of ignored servers, it is\nnecessary to use the option with an empty list:\n\nCHANGE MASTER TO IGNORE_SERVER_IDS = ();\n\nIf IGNORE_SERVER_IDS contains the server\'s own ID and the server was\nstarted with the --replicate-same-server-id option enabled, an error\nresults.\n\nAlso beginning with MySQL 5.5, the master.info file and the output of\nSHOW SLAVE STATUS are extended to provide the list of servers that are\ncurrently ignored. For more information, see\nhttp://dev.mysql.com/doc/refman/5.5/en/slave-logs-status.html, and\n[HELP SHOW SLAVE STATUS].\n\nBeginning with MySQL 5.5.5, invoking CHANGE MASTER TO causes the\nprevious values for MASTER_HOST, MASTER_PORT, MASTER_LOG_FILE, and\nMASTER_LOG_POS to be written to the error log, along with other\ninformation about the slave\'s state prior to execution.\n\nCHANGE MASTER TO is useful for setting up a slave when you have the\nsnapshot of the master and have recorded the master binary log\ncoordinates corresponding to the time of the snapshot. After loading\nthe snapshot into the slave to synchronize it to the slave, you can run\nCHANGE MASTER TO MASTER_LOG_FILE=\'log_name\', MASTER_LOG_POS=log_pos on\nthe slave to specify the coordinates at which the slave should begin\nreading the master binary log.\n\nThe following example changes the master server the slave uses and\nestablishes the master binary log coordinates from which the slave\nbegins reading. This is used when you want to set up the slave to\nreplicate the master:\n\nCHANGE MASTER TO\n MASTER_HOST=\'master2.mycompany.com\',\n MASTER_USER=\'replication\',\n MASTER_PASSWORD=\'bigs3cret\',\n MASTER_PORT=3306,\n MASTER_LOG_FILE=\'master2-bin.001\',\n MASTER_LOG_POS=4,\n MASTER_CONNECT_RETRY=10;\n\nThe next example shows an operation that is less frequently employed.\nIt is used when the slave has relay log files that you want it to\nexecute again for some reason. To do this, the master need not be\nreachable. You need only use CHANGE MASTER TO and start the SQL thread\n(START SLAVE SQL_THREAD):\n\nCHANGE MASTER TO\n RELAY_LOG_FILE=\'slave-relay-bin.006\',\n RELAY_LOG_POS=4025;\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/change-master-to.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/change-master-to.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (186,39,'DROP DATABASE','Syntax:\nDROP {DATABASE | SCHEMA} [IF EXISTS] db_name\n\nDROP DATABASE drops all tables in the database and deletes the\ndatabase. Be very careful with this statement! To use DROP DATABASE,\nyou need the DROP privilege on the database. DROP SCHEMA is a synonym\nfor DROP DATABASE.\n\n*Important*: When a database is dropped, user privileges on the\ndatabase are not automatically dropped. See [HELP GRANT].\n\nIF EXISTS is used to prevent an error from occurring if the database\ndoes not exist.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/drop-database.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/drop-database.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (187,6,'MBREQUAL','MBREqual(g1,g2)\n\nReturns 1 or 0 to indicate whether the Minimum Bounding Rectangles of\nthe two geometries g1 and g2 are the same.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/functions-for-testing-spatial-relations-between-geometric-objects.html#relations-on-geometry-mbr\n\n','','http://dev.mysql.com/doc/refman/5.5/en/functions-for-testing-spatial-relations-between-geometric-objects.html#relations-on-geometry-mbr'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (188,31,'TIMESTAMP FUNCTION','Syntax:\nTIMESTAMP(expr), TIMESTAMP(expr1,expr2)\n\nWith a single argument, this function returns the date or datetime\nexpression expr as a datetime value. With two arguments, it adds the\ntime expression expr2 to the date or datetime expression expr1 and\nreturns the result as a datetime value.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT TIMESTAMP(\'2003-12-31\');\n -> \'2003-12-31 00:00:00\'\nmysql> SELECT TIMESTAMP(\'2003-12-31 12:00:00\',\'12:00:00\');\n -> \'2004-01-01 00:00:00\'\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (189,33,'PROCEDURE ANALYSE','Syntax:\nANALYSE([max_elements[,max_memory]])\n\nANALYSE() examines the result from a query and returns an analysis of\nthe results that suggests optimal data types for each column that may\nhelp reduce table sizes. To obtain this analysis, append PROCEDURE\nANALYSE to the end of a SELECT statement:\n\nSELECT ... FROM ... WHERE ... PROCEDURE ANALYSE([max_elements,[max_memory]])\n\nFor example:\n\nSELECT col1, col2 FROM table1 PROCEDURE ANALYSE(10, 2000);\n\nThe results show some statistics for the values returned by the query,\nand propose an optimal data type for the columns. This can be helpful\nfor checking your existing tables, or after importing new data. You may\nneed to try different settings for the arguments so that PROCEDURE\nANALYSE() does not suggest the ENUM data type when it is not\nappropriate.\n\nThe arguments are optional and are used as follows:\n\no max_elements (default 256) is the maximum number of distinct values\n that ANALYSE() notices per column. This is used by ANALYSE() to check\n whether the optimal data type should be of type ENUM; if there are\n more than max_elements distinct values, then ENUM is not a suggested\n type.\n\no max_memory (default 8192) is the maximum amount of memory that\n ANALYSE() should allocate per column while trying to find all\n distinct values.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/procedure-analyse.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/procedure-analyse.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (190,9,'HELP_VERSION','This help information was generated from the MySQL 5.5 Reference Manual\non: 2012-08-25 (revision: 31914)\n\nThis information applies to MySQL 5.5 through 5.5.29.\n','',''); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (191,37,'CHARACTER_LENGTH','Syntax:\nCHARACTER_LENGTH(str)\n\nCHARACTER_LENGTH() is a synonym for CHAR_LENGTH().\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (192,26,'SHOW GRANTS','Syntax:\nSHOW GRANTS [FOR user]\n\nThis statement lists the GRANT statement or statements that must be\nissued to duplicate the privileges that are granted to a MySQL user\naccount. The account is named using the same format as for the GRANT\nstatement; for example, \'jeffrey\'@\'localhost\'. If you specify only the\nuser name part of the account name, a host name part of \'%\' is used.\nFor additional information about specifying account names, see [HELP\nGRANT].\n\nmysql> SHOW GRANTS FOR \'root\'@\'localhost\';\n+---------------------------------------------------------------------+\n| Grants for root@localhost |\n+---------------------------------------------------------------------+\n| GRANT ALL PRIVILEGES ON *.* TO \'root\'@\'localhost\' WITH GRANT OPTION |\n+---------------------------------------------------------------------+\n\nTo list the privileges granted to the account that you are using to\nconnect to the server, you can use any of the following statements:\n\nSHOW GRANTS;\nSHOW GRANTS FOR CURRENT_USER;\nSHOW GRANTS FOR CURRENT_USER();\n\nIf SHOW GRANTS FOR CURRENT_USER (or any of the equivalent syntaxes) is\nused in DEFINER context, such as within a stored procedure that is\ndefined with SQL SECURITY DEFINER), the grants displayed are those of\nthe definer and not the invoker.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-grants.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/show-grants.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (193,26,'SHOW PRIVILEGES','Syntax:\nSHOW PRIVILEGES\n\nSHOW PRIVILEGES shows the list of system privileges that the MySQL\nserver supports. The exact list of privileges depends on the version of\nyour server.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-privileges.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/show-privileges.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (194,39,'CREATE TABLESPACE','Syntax:\nCREATE TABLESPACE tablespace_name\n ADD DATAFILE \'file_name\'\n USE LOGFILE GROUP logfile_group\n [EXTENT_SIZE [=] extent_size]\n [INITIAL_SIZE [=] initial_size]\n [AUTOEXTEND_SIZE [=] autoextend_size]\n [MAX_SIZE [=] max_size]\n [NODEGROUP [=] nodegroup_id]\n [WAIT]\n [COMMENT [=] comment_text]\n ENGINE [=] engine_name\n\nThis statement is used to create a tablespace, which can contain one or\nmore data files, providing storage space for tables. One data file is\ncreated and added to the tablespace using this statement. Additional\ndata files may be added to the tablespace by using the ALTER TABLESPACE\nstatement (see [HELP ALTER TABLESPACE]). For rules covering the naming\nof tablespaces, see\nhttp://dev.mysql.com/doc/refman/5.5/en/identifiers.html.\n\n*Note*: All MySQL Cluster Disk Data objects share the same namespace.\nThis means that each Disk Data object must be uniquely named (and not\nmerely each Disk Data object of a given type). For example, you cannot\nhave a tablespace and a log file group with the same name, or a\ntablespace and a data file with the same name.\n\nA log file group of one or more UNDO log files must be assigned to the\ntablespace to be created with the USE LOGFILE GROUP clause.\nlogfile_group must be an existing log file group created with CREATE\nLOGFILE GROUP (see\nhttp://dev.mysql.com/doc/refman/5.5/en/create-logfile-group.html).\nMultiple tablespaces may use the same log file group for UNDO logging.\n\nThe EXTENT_SIZE sets the size, in bytes, of the extents used by any\nfiles belonging to the tablespace. The default value is 1M. The minimum\nsize is 32K, and theoretical maximum is 2G, although the practical\nmaximum size depends on a number of factors. In most cases, changing\nthe extent size does not have any measurable effect on performance, and\nthe default value is recommended for all but the most unusual\nsituations.\n\nAn extent is a unit of disk space allocation. One extent is filled with\nas much data as that extent can contain before another extent is used.\nIn theory, up to 65,535 (64K) extents may used per data file; however,\nthe recommended maximum is 32,768 (32K). The recommended maximum size\nfor a single data file is 32G---that is, 32K extents x 1 MB per extent.\nIn addition, once an extent is allocated to a given partition, it\ncannot be used to store data from a different partition; an extent\ncannot store data from more than one partition. This means, for example\nthat a tablespace having a single datafile whose INITIAL_SIZE is 256 MB\nand whose EXTENT_SIZE is 128M has just two extents, and so can be used\nto store data from at most two different disk data table partitions.\n\nYou can see how many extents remain free in a given data file by\nquerying the INFORMATION_SCHEMA.FILES table, and so derive an estimate\nfor how much space remains free in the file. For further discussion and\nexamples, see http://dev.mysql.com/doc/refman/5.5/en/files-table.html.\n\nThe INITIAL_SIZE parameter sets the data file\'s total size in bytes.\nOnce the file has been created, its size cannot be changed; however,\nyou can add more data files to the tablespace using ALTER TABLESPACE\n... ADD DATAFILE. See [HELP ALTER TABLESPACE].\n\nINITIAL_SIZE is optional; its default value is 128M.\n\nOn 32-bit systems, the maximum supported value for INITIAL_SIZE is 4G.\n(Bug #29186)\n\nWhen setting EXTENT_SIZE or INITIAL_SIZE (either or both), you may\noptionally follow the number with a one-letter abbreviation for an\norder of magnitude, similar to those used in my.cnf. Generally, this is\none of the letters M (for megabytes) or G (for gigabytes).\n\nINITIAL_SIZE, EXTENT_SIZE, and UNDO_BUFFER_SIZE are subject to rounding\nas follows:\n\no EXTENT_SIZE and UNDO_BUFFER_SIZE are each rounded up to the nearest\n whole multiple of 32K.\n\no INITIAL_SIZE is rounded down to the nearest whole multiple of 32K.\n\n For data files, INITIAL_SIZE is subject to further rounding; the\n result just obtained is rounded up to the nearest whole multiple of\n EXTENT_SIZE (after any rounding).\n\nThe rounding just described is done explicitly, and a warning is issued\nby the MySQL Server when any such rounding is performed. The rounded\nvalues are also used by the NDB kernel for calculating\nINFORMATION_SCHEMA.FILES column values and other purposes. However, to\navoid an unexpected result, we suggest that you always use whole\nmultiples of 32K in specifying these options.\n\nAUTOEXTEND_SIZE, MAX_SIZE, NODEGROUP, WAIT, and COMMENT are parsed but\nignored, and so currently have no effect. These options are intended\nfor future expansion.\n\nThe ENGINE parameter determines the storage engine which uses this\ntablespace, with engine_name being the name of the storage engine.\nCurrently, engine_name must be one of the values NDB or NDBCLUSTER.\n\nWhen CREATE TABLESPACE is used with ENGINE = NDB, a tablespace and\nassociated data file are created on each Cluster data node. You can\nverify that the data files were created and obtain information about\nthem by querying the INFORMATION_SCHEMA.FILES table. For example:\n\nmysql> SELECT LOGFILE_GROUP_NAME, FILE_NAME, EXTRA\n -> FROM INFORMATION_SCHEMA.FILES\n -> WHERE TABLESPACE_NAME = \'newts\' AND FILE_TYPE = \'DATAFILE\';\n+--------------------+-------------+----------------+\n| LOGFILE_GROUP_NAME | FILE_NAME | EXTRA |\n+--------------------+-------------+----------------+\n| lg_3 | newdata.dat | CLUSTER_NODE=3 |\n| lg_3 | newdata.dat | CLUSTER_NODE=4 |\n+--------------------+-------------+----------------+\n2 rows in set (0.01 sec)\n\n(See http://dev.mysql.com/doc/refman/5.5/en/files-table.html.)\n\nCREATE TABLESPACE is useful only with Disk Data storage for MySQL\nCluster. See\nhttp://dev.mysql.com/doc/refman/5.5/en/mysql-cluster-disk-data.html.\n\nTo drop a primary key, the index name is always PRIMARY, which must be\nspecified as a quoted identifier because PRIMARY is a reserved word:\n\nDROP INDEX `PRIMARY` ON t;\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/create-tablespace.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/create-tablespace.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (195,37,'INSERT FUNCTION','Syntax:\nINSERT(str,pos,len,newstr)\n\nReturns the string str, with the substring beginning at position pos\nand len characters long replaced by the string newstr. Returns the\noriginal string if pos is not within the length of the string. Replaces\nthe rest of the string from position pos if len is not within the\nlength of the rest of the string. Returns NULL if any argument is NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','mysql> SELECT INSERT(\'Quadratic\', 3, 4, \'What\');\n -> \'QuWhattic\'\nmysql> SELECT INSERT(\'Quadratic\', -1, 4, \'What\');\n -> \'Quadratic\'\nmysql> SELECT INSERT(\'Quadratic\', 3, 100, \'What\');\n -> \'QuWhat\'\n','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (196,4,'CRC32','Syntax:\nCRC32(expr)\n\nComputes a cyclic redundancy check value and returns a 32-bit unsigned\nvalue. The result is NULL if the argument is NULL. The argument is\nexpected to be a string and (if possible) is treated as one if it is\nnot.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html\n\n','mysql> SELECT CRC32(\'MySQL\');\n -> 3259397556\nmysql> SELECT CRC32(\'mysql\');\n -> 2501908538\n','http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (197,15,'XOR','Syntax:\nXOR\n\nLogical XOR. Returns NULL if either operand is NULL. For non-NULL\noperands, evaluates to 1 if an odd number of operands is nonzero,\notherwise 0 is returned.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/logical-operators.html\n\n','mysql> SELECT 1 XOR 1;\n -> 0\nmysql> SELECT 1 XOR 0;\n -> 1\nmysql> SELECT 1 XOR NULL;\n -> NULL\nmysql> SELECT 1 XOR 1 XOR 1;\n -> 1\n','http://dev.mysql.com/doc/refman/5.5/en/logical-operators.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (198,13,'STARTPOINT','StartPoint(ls)\n\nReturns the Point that is the start point of the LineString value ls.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#linestring-property-functions\n\n','mysql> SET @ls = \'LineString(1 1,2 2,3 3)\';\nmysql> SELECT AsText(StartPoint(GeomFromText(@ls)));\n+---------------------------------------+\n| AsText(StartPoint(GeomFromText(@ls))) |\n+---------------------------------------+\n| POINT(1 1) |\n+---------------------------------------+\n','http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#linestring-property-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (199,10,'GRANT','Syntax:\nGRANT\n priv_type [(column_list)]\n [, priv_type [(column_list)]] ...\n ON [object_type] priv_level\n TO user_specification [, user_specification] ...\n [REQUIRE {NONE | ssl_option [[AND] ssl_option] ...}]\n [WITH with_option ...]\n\nGRANT PROXY ON user_specification\n TO user_specification [, user_specification] ...\n [WITH GRANT OPTION]\n\nobject_type:\n TABLE\n | FUNCTION\n | PROCEDURE\n\npriv_level:\n *\n | *.*\n | db_name.*\n | db_name.tbl_name\n | tbl_name\n | db_name.routine_name\n\nuser_specification:\n user\n [\n IDENTIFIED BY [PASSWORD] \'password\'\n | IDENTIFIED WITH auth_plugin [AS \'auth_string\']\n ]\n\nssl_option:\n SSL\n | X509\n | CIPHER \'cipher\'\n | ISSUER \'issuer\'\n | SUBJECT \'subject\'\n\nwith_option:\n GRANT OPTION\n | MAX_QUERIES_PER_HOUR count\n | MAX_UPDATES_PER_HOUR count\n | MAX_CONNECTIONS_PER_HOUR count\n | MAX_USER_CONNECTIONS count\n\nThe GRANT statement grants privileges to MySQL user accounts. GRANT\nalso serves to specify other account characteristics such as use of\nsecure connections and limits on access to server resources. To use\nGRANT, you must have the GRANT OPTION privilege, and you must have the\nprivileges that you are granting.\n\nNormally, a database administrator first uses CREATE USER to create an\naccount, then GRANT to define its privileges and characteristics. For\nexample:\n\nCREATE USER \'jeffrey\'@\'localhost\' IDENTIFIED BY \'mypass\';\nGRANT ALL ON db1.* TO \'jeffrey\'@\'localhost\';\nGRANT SELECT ON db2.invoice TO \'jeffrey\'@\'localhost\';\nGRANT USAGE ON *.* TO \'jeffrey\'@\'localhost\' WITH MAX_QUERIES_PER_HOUR 90;\n\nHowever, if an account named in a GRANT statement does not already\nexist, GRANT may create it under the conditions described later in the\ndiscussion of the NO_AUTO_CREATE_USER SQL mode.\n\nThe REVOKE statement is related to GRANT and enables administrators to\nremove account privileges. See [HELP REVOKE].\n\nWhen successfully executed from the mysql program, GRANT responds with\nQuery OK, 0 rows affected. To determine what privileges result from the\noperation, use SHOW GRANTS. See [HELP SHOW GRANTS].\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/grant.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/grant.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (200,23,'DECLARE VARIABLE','Syntax:\nDECLARE var_name [, var_name] ... type [DEFAULT value]\n\nThis statement declares local variables within stored programs. To\nprovide a default value for a variable, include a DEFAULT clause. The\nvalue can be specified as an expression; it need not be a constant. If\nthe DEFAULT clause is missing, the initial value is NULL.\n\nLocal variables are treated like stored routine parameters with respect\nto data type and overflow checking. See [HELP CREATE PROCEDURE].\n\nVariable declarations must appear before cursor or handler\ndeclarations.\n\nLocal variable names are not case sensitive. Permissible characters and\nquoting rules are the same as for other identifiers, as described in\nhttp://dev.mysql.com/doc/refman/5.5/en/identifiers.html.\n\nThe scope of a local variable is the BEGIN ... END block within which\nit is declared. The variable can be referred to in blocks nested within\nthe declaring block, except those blocks that declare a variable with\nthe same name.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/declare-local-variable.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/declare-local-variable.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (201,3,'MPOLYFROMTEXT','MPolyFromText(wkt[,srid]), MultiPolygonFromText(wkt[,srid])\n\nConstructs a MULTIPOLYGON value using its WKT representation and SRID.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-wkt-functions\n\n','','http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-wkt-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (202,6,'MBRINTERSECTS','MBRIntersects(g1,g2)\n\nReturns 1 or 0 to indicate whether the Minimum Bounding Rectangles of\nthe two geometries g1 and g2 intersect.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/functions-for-testing-spatial-relations-between-geometric-objects.html#relations-on-geometry-mbr\n\n','','http://dev.mysql.com/doc/refman/5.5/en/functions-for-testing-spatial-relations-between-geometric-objects.html#relations-on-geometry-mbr'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (203,16,'BIT_OR','Syntax:\nBIT_OR(expr)\n\nReturns the bitwise OR of all bits in expr. The calculation is\nperformed with 64-bit (BIGINT) precision.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/group-by-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/group-by-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (204,31,'YEARWEEK','Syntax:\nYEARWEEK(date), YEARWEEK(date,mode)\n\nReturns year and week for a date. The mode argument works exactly like\nthe mode argument to WEEK(). The year in the result may be different\nfrom the year in the date argument for the first and the last week of\nthe year.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT YEARWEEK(\'1987-01-01\');\n -> 198653\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (205,18,'NOT BETWEEN','Syntax:\nexpr NOT BETWEEN min AND max\n\nThis is the same as NOT (expr BETWEEN min AND max).\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (206,18,'IS NOT','Syntax:\nIS NOT boolean_value\n\nTests a value against a boolean value, where boolean_value can be TRUE,\nFALSE, or UNKNOWN.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html\n\n','mysql> SELECT 1 IS NOT UNKNOWN, 0 IS NOT UNKNOWN, NULL IS NOT UNKNOWN;\n -> 1, 1, 0\n','http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (207,4,'LOG10','Syntax:\nLOG10(X)\n\nReturns the base-10 logarithm of X.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html\n\n','mysql> SELECT LOG10(2);\n -> 0.30102999566398\nmysql> SELECT LOG10(100);\n -> 2\nmysql> SELECT LOG10(-100);\n -> NULL\n','http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (208,4,'SQRT','Syntax:\nSQRT(X)\n\nReturns the square root of a nonnegative number X.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html\n\n','mysql> SELECT SQRT(4);\n -> 2\nmysql> SELECT SQRT(20);\n -> 4.4721359549996\nmysql> SELECT SQRT(-16);\n -> NULL\n','http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (209,22,'DECIMAL','DECIMAL[(M[,D])] [UNSIGNED] [ZEROFILL]\n\nA packed "exact" fixed-point number. M is the total number of digits\n(the precision) and D is the number of digits after the decimal point\n(the scale). The decimal point and (for negative numbers) the "-" sign\nare not counted in M. If D is 0, values have no decimal point or\nfractional part. The maximum number of digits (M) for DECIMAL is 65.\nThe maximum number of supported decimals (D) is 30. If D is omitted,\nthe default is 0. If M is omitted, the default is 10.\n\nUNSIGNED, if specified, disallows negative values.\n\nAll basic calculations (+, -, *, /) with DECIMAL columns are done with\na precision of 65 digits.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/numeric-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/numeric-type-overview.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (210,39,'CREATE INDEX','Syntax:\nCREATE [ONLINE|OFFLINE] [UNIQUE|FULLTEXT|SPATIAL] INDEX index_name\n [index_type]\n ON tbl_name (index_col_name,...)\n [index_option] ...\n\nindex_col_name:\n col_name [(length)] [ASC | DESC]\n\nindex_type:\n USING {BTREE | HASH}\n\nindex_option:\n KEY_BLOCK_SIZE [=] value\n | index_type\n | WITH PARSER parser_name\n | COMMENT \'string\'\n\nCREATE INDEX is mapped to an ALTER TABLE statement to create indexes.\nSee [HELP ALTER TABLE]. CREATE INDEX cannot be used to create a PRIMARY\nKEY; use ALTER TABLE instead. For more information about indexes, see\nhttp://dev.mysql.com/doc/refman/5.5/en/mysql-indexes.html.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/create-index.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/create-index.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (211,39,'CREATE FUNCTION','The CREATE FUNCTION statement is used to create stored functions and\nuser-defined functions (UDFs):\n\no For information about creating stored functions, see [HELP CREATE\n PROCEDURE].\n\no For information about creating user-defined functions, see [HELP\n CREATE FUNCTION UDF].\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/create-function.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/create-function.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (212,39,'ALTER DATABASE','Syntax:\nALTER {DATABASE | SCHEMA} [db_name]\n alter_specification ...\nALTER {DATABASE | SCHEMA} db_name\n UPGRADE DATA DIRECTORY NAME\n\nalter_specification:\n [DEFAULT] CHARACTER SET [=] charset_name\n | [DEFAULT] COLLATE [=] collation_name\n\nALTER DATABASE enables you to change the overall characteristics of a\ndatabase. These characteristics are stored in the db.opt file in the\ndatabase directory. To use ALTER DATABASE, you need the ALTER privilege\non the database. ALTER SCHEMA is a synonym for ALTER DATABASE.\n\nThe database name can be omitted from the first syntax, in which case\nthe statement applies to the default database.\n\nNational Language Characteristics\n\nThe CHARACTER SET clause changes the default database character set.\nThe COLLATE clause changes the default database collation.\nhttp://dev.mysql.com/doc/refman/5.5/en/charset.html, discusses\ncharacter set and collation names.\n\nYou can see what character sets and collations are available using,\nrespectively, the SHOW CHARACTER SET and SHOW COLLATION statements. See\n[HELP SHOW CHARACTER SET], and [HELP SHOW COLLATION], for more\ninformation.\n\nIf you change the default character set or collation for a database,\nstored routines that use the database defaults must be dropped and\nrecreated so that they use the new defaults. (In a stored routine,\nvariables with character data types use the database defaults if the\ncharacter set or collation are not specified explicitly. See [HELP\nCREATE PROCEDURE].)\n\nUpgrading from Versions Older than MySQL 5.1\n\nThe syntax that includes the UPGRADE DATA DIRECTORY NAME clause updates\nthe name of the directory associated with the database to use the\nencoding implemented in MySQL 5.1 for mapping database names to\ndatabase directory names (see\nhttp://dev.mysql.com/doc/refman/5.5/en/identifier-mapping.html). This\nclause is for use under these conditions:\n\no It is intended when upgrading MySQL to 5.1 or later from older\n versions.\n\no It is intended to update a database directory name to the current\n encoding format if the name contains special characters that need\n encoding.\n\no The statement is used by mysqlcheck (as invoked by mysql_upgrade).\n\nFor example, if a database in MySQL 5.0 has the name a-b-c, the name\ncontains instances of the - (dash) character. In MySQL 5.0, the\ndatabase directory is also named a-b-c, which is not necessarily safe\nfor all file systems. In MySQL 5.1 and later, the same database name is\nencoded as a@002db@002dc to produce a file system-neutral directory\nname.\n\nWhen a MySQL installation is upgraded to MySQL 5.1 or later from an\nolder version,the server displays a name such as a-b-c (which is in the\nold format) as #mysql50#a-b-c, and you must refer to the name using the\n#mysql50# prefix. Use UPGRADE DATA DIRECTORY NAME in this case to\nexplicitly tell the server to re-encode the database directory name to\nthe current encoding format:\n\nALTER DATABASE `#mysql50#a-b-c` UPGRADE DATA DIRECTORY NAME;\n\nAfter executing this statement, you can refer to the database as a-b-c\nwithout the special #mysql50# prefix.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/alter-database.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/alter-database.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (213,25,'GEOMETRYN','GeometryN(gc,N)\n\nReturns the N-th geometry in the GeometryCollection value gc.\nGeometries are numbered beginning with 1.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#geometrycollection-property-functions\n\n','mysql> SET @gc = \'GeometryCollection(Point(1 1),LineString(2 2, 3 3))\';\nmysql> SELECT AsText(GeometryN(GeomFromText(@gc),1));\n+----------------------------------------+\n| AsText(GeometryN(GeomFromText(@gc),1)) |\n+----------------------------------------+\n| POINT(1 1) |\n+----------------------------------------+\n','http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#geometrycollection-property-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (214,19,'<<','Syntax:\n<<\n\nShifts a longlong (BIGINT) number to the left.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/bit-functions.html\n\n','mysql> SELECT 1 << 2;\n -> 4\n','http://dev.mysql.com/doc/refman/5.5/en/bit-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (215,26,'SHOW TABLE STATUS','Syntax:\nSHOW TABLE STATUS [{FROM | IN} db_name]\n [LIKE \'pattern\' | WHERE expr]\n\nSHOW TABLE STATUS works likes SHOW TABLES, but provides a lot of\ninformation about each non-TEMPORARY table. You can also get this list\nusing the mysqlshow --status db_name command. The LIKE clause, if\npresent, indicates which table names to match. The WHERE clause can be\ngiven to select rows using more general conditions, as discussed in\nhttp://dev.mysql.com/doc/refman/5.5/en/extended-show.html.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-table-status.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/show-table-status.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (216,12,'MD5','Syntax:\nMD5(str)\n\nCalculates an MD5 128-bit checksum for the string. The value is\nreturned as a string of 32 hex digits, or NULL if the argument was\nNULL. The return value can, for example, be used as a hash key. See the\nnotes at the beginning of this section about storing hash values\nefficiently.\n\nAs of MySQL 5.5.3, the return value is a nonbinary string in the\nconnection character set. Before 5.5.3, the return value is a binary\nstring; see the notes at the beginning of this section about using the\nvalue as a nonbinary string.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/encryption-functions.html\n\n','mysql> SELECT MD5(\'testing\');\n -> \'ae2b1fca515949e5d54fb22b8ed95575\'\n','http://dev.mysql.com/doc/refman/5.5/en/encryption-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (217,18,'<','Syntax:\n<\n\nLess than:\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html\n\n','mysql> SELECT 2 < 2;\n -> 0\n','http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (218,31,'UNIX_TIMESTAMP','Syntax:\nUNIX_TIMESTAMP(), UNIX_TIMESTAMP(date)\n\nIf called with no argument, returns a Unix timestamp (seconds since\n\'1970-01-01 00:00:00\' UTC) as an unsigned integer. If UNIX_TIMESTAMP()\nis called with a date argument, it returns the value of the argument as\nseconds since \'1970-01-01 00:00:00\' UTC. date may be a DATE string, a\nDATETIME string, a TIMESTAMP, or a number in the format YYMMDD or\nYYYYMMDD. The server interprets date as a value in the current time\nzone and converts it to an internal value in UTC. Clients can set their\ntime zone as described in\nhttp://dev.mysql.com/doc/refman/5.5/en/time-zone-support.html.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT UNIX_TIMESTAMP();\n -> 1196440210\nmysql> SELECT UNIX_TIMESTAMP(\'2007-11-30 10:30:19\');\n -> 1196440219\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (219,31,'DAYOFMONTH','Syntax:\nDAYOFMONTH(date)\n\nReturns the day of the month for date, in the range 1 to 31, or 0 for\ndates such as \'0000-00-00\' or \'2008-00-00\' that have a zero day part.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT DAYOFMONTH(\'2007-02-03\');\n -> 3\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (220,37,'ASCII','Syntax:\nASCII(str)\n\nReturns the numeric value of the leftmost character of the string str.\nReturns 0 if str is the empty string. Returns NULL if str is NULL.\nASCII() works for 8-bit characters.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','mysql> SELECT ASCII(\'2\');\n -> 50\nmysql> SELECT ASCII(2);\n -> 50\nmysql> SELECT ASCII(\'dx\');\n -> 100\n','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (221,4,'DIV','Syntax:\nDIV\n\nInteger division. Similar to FLOOR(), but is safe with BIGINT values.\n\nAs of MySQL 5.5.3, if either operand has a noninteger type, the\noperands are converted to DECIMAL and divided using DECIMAL arithmetic\nbefore converting the result to BIGINT. If the result exceeds BIGINT\nrange, an error occurs. Before MySQL 5.5.3, incorrect results may occur\nfor noninteger operands that exceed BIGINT range.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/arithmetic-functions.html\n\n','mysql> SELECT 5 DIV 2;\n -> 2\n','http://dev.mysql.com/doc/refman/5.5/en/arithmetic-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (222,10,'RENAME USER','Syntax:\nRENAME USER old_user TO new_user\n [, old_user TO new_user] ...\n\nThe RENAME USER statement renames existing MySQL accounts. To use it,\nyou must have the global CREATE USER privilege or the UPDATE privilege\nfor the mysql database. An error occurs if any old account does not\nexist or any new account exists. Each account name uses the format\ndescribed in http://dev.mysql.com/doc/refman/5.5/en/account-names.html.\nFor example:\n\nRENAME USER \'jeffrey\'@\'localhost\' TO \'jeff\'@\'127.0.0.1\';\n\nIf you specify only the user name part of the account name, a host name\npart of \'%\' is used.\n\nRENAME USER causes the privileges held by the old user to be those held\nby the new user. However, RENAME USER does not automatically drop or\ninvalidate databases or objects within them that the old user created.\nThis includes stored programs or views for which the DEFINER attribute\nnames the old user. Attempts to access such objects may produce an\nerror if they execute in definer security context. (For information\nabout security context, see\nhttp://dev.mysql.com/doc/refman/5.5/en/stored-programs-security.html.)\n\nThe privilege changes take effect as indicated in\nhttp://dev.mysql.com/doc/refman/5.5/en/privilege-changes.html.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/rename-user.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/rename-user.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (223,26,'SHOW SLAVE STATUS','Syntax:\nSHOW SLAVE STATUS\n\nThis statement provides status information on essential parameters of\nthe slave threads. It requires either the SUPER or REPLICATION CLIENT\nprivilege.\n\nIf you issue this statement using the mysql client, you can use a \\G\nstatement terminator rather than a semicolon to obtain a more readable\nvertical layout:\n\nmysql> SHOW SLAVE STATUS\\G\n*************************** 1. row ***************************\n Slave_IO_State: Waiting for master to send event\n Master_Host: localhost\n Master_User: root\n Master_Port: 3306\n Connect_Retry: 3\n Master_Log_File: gbichot-bin.005\n Read_Master_Log_Pos: 79\n Relay_Log_File: gbichot-relay-bin.005\n Relay_Log_Pos: 548\n Relay_Master_Log_File: gbichot-bin.005\n Slave_IO_Running: Yes\n Slave_SQL_Running: Yes\n Replicate_Do_DB:\n Replicate_Ignore_DB:\n Replicate_Do_Table:\n Replicate_Ignore_Table:\n Replicate_Wild_Do_Table:\n Replicate_Wild_Ignore_Table:\n Last_Errno: 0\n Last_Error:\n Skip_Counter: 0\n Exec_Master_Log_Pos: 79\n Relay_Log_Space: 552\n Until_Condition: None\n Until_Log_File:\n Until_Log_Pos: 0\n Master_SSL_Allowed: No\n Master_SSL_CA_File:\n Master_SSL_CA_Path:\n Master_SSL_Cert:\n Master_SSL_Cipher:\n Master_SSL_Key:\n Seconds_Behind_Master: 8\nMaster_SSL_Verify_Server_Cert: No\n Last_IO_Errno: 0\n Last_IO_Error:\n Last_SQL_Errno: 0\n Last_SQL_Error:\n Replicate_Ignore_Server_Ids: 0\n Master_Server_Id: 1\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-slave-status.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/show-slave-status.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (224,34,'GEOMETRY','MySQL provides a standard way of creating spatial columns for geometry\ntypes, for example, with CREATE TABLE or ALTER TABLE. Currently,\nspatial columns are supported for MyISAM, InnoDB, NDB, and ARCHIVE\ntables. See also the annotations about spatial indexes under [HELP\nSPATIAL].\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-columns.html\n\n','CREATE TABLE geom (g GEOMETRY);\n','http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-columns.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (225,13,'NUMPOINTS','NumPoints(ls)\n\nReturns the number of Point objects in the LineString value ls.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#linestring-property-functions\n\n','mysql> SET @ls = \'LineString(1 1,2 2,3 3)\';\nmysql> SELECT NumPoints(GeomFromText(@ls));\n+------------------------------+\n| NumPoints(GeomFromText(@ls)) |\n+------------------------------+\n| 3 |\n+------------------------------+\n','http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#linestring-property-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (226,39,'ALTER LOGFILE GROUP','Syntax:\nALTER LOGFILE GROUP logfile_group\n ADD UNDOFILE \'file_name\'\n [INITIAL_SIZE [=] size]\n [WAIT]\n ENGINE [=] engine_name\n\nThis statement adds an UNDO file named \'file_name\' to an existing log\nfile group logfile_group. An ALTER LOGFILE GROUP statement has one and\nonly one ADD UNDOFILE clause. No DROP UNDOFILE clause is currently\nsupported.\n\n*Note*: All MySQL Cluster Disk Data objects share the same namespace.\nThis means that each Disk Data object must be uniquely named (and not\nmerely each Disk Data object of a given type). For example, you cannot\nhave a tablespace and an undo log file with the same name, or an undo\nlog file and a data file with the same name.\n\nThe optional INITIAL_SIZE parameter sets the UNDO file\'s initial size\nin bytes; if not specified, the initial size default to 128M (128\nmegabytes). You may optionally follow size with a one-letter\nabbreviation for an order of magnitude, similar to those used in\nmy.cnf. Generally, this is one of the letters M (for megabytes) or G\n(for gigabytes).\n\nOn 32-bit systems, the maximum supported value for INITIAL_SIZE is 4G.\n(Bug #29186)\n\nThe minimum permitted value for INITIAL_SIZE is 1M. (Bug #29574)\n\n*Note*: WAIT is parsed but otherwise ignored. This keyword currently\nhas no effect, and is intended for future expansion.\n\nThe ENGINE parameter (required) determines the storage engine which is\nused by this log file group, with engine_name being the name of the\nstorage engine. Currently, the only accepted values for engine_name are\n"NDBCLUSTER" and "NDB". The two values are equivalent.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/alter-logfile-group.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/alter-logfile-group.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (227,19,'&','Syntax:\n&\n\nBitwise AND:\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/bit-functions.html\n\n','mysql> SELECT 29 & 15;\n -> 13\n','http://dev.mysql.com/doc/refman/5.5/en/bit-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (228,31,'LOCALTIMESTAMP','Syntax:\nLOCALTIMESTAMP, LOCALTIMESTAMP()\n\nLOCALTIMESTAMP and LOCALTIMESTAMP() are synonyms for NOW().\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (229,15,'ASSIGN-EQUAL','Syntax:\n=\n\nThis operator is used to perform value assignments in two cases,\ndescribed in the next two paragraphs.\n\nWithin a SET statement, = is treated as an assignment operator that\ncauses the user variable on the left hand side of the operator to take\non the value to its right. (In other words, when used in a SET\nstatement, = is treated identically to :=.) The value on the right hand\nside may be a literal value, another variable storing a value, or any\nlegal expression that yields a scalar value, including the result of a\nquery (provided that this value is a scalar value). You can perform\nmultiple assignments in the same SET statement.\n\nIn the SET clause of an UPDATE statement, = also acts as an assignment\noperator; in this case, however, it causes the column named on the left\nhand side of the operator to assume the value given to the right,\nprovided any WHERE conditions that are part of the UPDATE are met. You\ncan make multiple assignments in the same SET clause of an UPDATE\nstatement.\n\nIn any other context, = is treated as a comparison operator.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/assignment-operators.html\n\n','mysql> SELECT @var1, @var2;\n -> NULL, NULL\nmysql> SELECT @var1 := 1, @var2;\n -> 1, NULL\nmysql> SELECT @var1, @var2;\n -> 1, NULL\nmysql> SELECT @var1, @var2 := @var1;\n -> 1, 1\nmysql> SELECT @var1, @var2;\n -> 1, 1\n','http://dev.mysql.com/doc/refman/5.5/en/assignment-operators.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (230,37,'CONVERT','Syntax:\nCONVERT(expr,type), CONVERT(expr USING transcoding_name)\n\nThe CONVERT() and CAST() functions take an expression of any type and\nproduce a result value of a specified type.\n\nThe type for the result can be one of the following values:\n\no BINARY[(N)]\n\no CHAR[(N)]\n\no DATE\n\no DATETIME\n\no DECIMAL[(M[,D])]\n\no SIGNED [INTEGER]\n\no TIME\n\no UNSIGNED [INTEGER]\n\nBINARY produces a string with the BINARY data type. See\nhttp://dev.mysql.com/doc/refman/5.5/en/binary-varbinary.html for a\ndescription of how this affects comparisons. If the optional length N\nis given, BINARY(N) causes the cast to use no more than N bytes of the\nargument. Values shorter than N bytes are padded with 0x00 bytes to a\nlength of N.\n\nCHAR(N) causes the cast to use no more than N characters of the\nargument.\n\nCAST() and CONVERT(... USING ...) are standard SQL syntax. The\nnon-USING form of CONVERT() is ODBC syntax.\n\nCONVERT() with USING is used to convert data between different\ncharacter sets. In MySQL, transcoding names are the same as the\ncorresponding character set names. For example, this statement converts\nthe string \'abc\' in the default character set to the corresponding\nstring in the utf8 character set:\n\nSELECT CONVERT(\'abc\' USING utf8);\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/cast-functions.html\n\n','SELECT enum_col FROM tbl_name ORDER BY CAST(enum_col AS CHAR);\n','http://dev.mysql.com/doc/refman/5.5/en/cast-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (231,31,'ADDDATE','Syntax:\nADDDATE(date,INTERVAL expr unit), ADDDATE(expr,days)\n\nWhen invoked with the INTERVAL form of the second argument, ADDDATE()\nis a synonym for DATE_ADD(). The related function SUBDATE() is a\nsynonym for DATE_SUB(). For information on the INTERVAL unit argument,\nsee the discussion for DATE_ADD().\n\nmysql> SELECT DATE_ADD(\'2008-01-02\', INTERVAL 31 DAY);\n -> \'2008-02-02\'\nmysql> SELECT ADDDATE(\'2008-01-02\', INTERVAL 31 DAY);\n -> \'2008-02-02\'\n\nWhen invoked with the days form of the second argument, MySQL treats it\nas an integer number of days to be added to expr.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT ADDDATE(\'2008-01-02\', 31);\n -> \'2008-02-02\'\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (232,23,'REPEAT LOOP','Syntax:\n[begin_label:] REPEAT\n statement_list\nUNTIL search_condition\nEND REPEAT [end_label]\n\nThe statement list within a REPEAT statement is repeated until the\nsearch_condition expression is true. Thus, a REPEAT always enters the\nloop at least once. statement_list consists of one or more statements,\neach terminated by a semicolon (;) statement delimiter.\n\nA REPEAT statement can be labeled. For the rules regarding label use,\nsee [HELP labels].\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/repeat.html\n\n','mysql> delimiter //\n\nmysql> CREATE PROCEDURE dorepeat(p1 INT)\n -> BEGIN\n -> SET @x = 0;\n -> REPEAT\n -> SET @x = @x + 1;\n -> UNTIL @x > p1 END REPEAT;\n -> END\n -> //\nQuery OK, 0 rows affected (0.00 sec)\n\nmysql> CALL dorepeat(1000)//\nQuery OK, 0 rows affected (0.00 sec)\n\nmysql> SELECT @x//\n+------+\n| @x |\n+------+\n| 1001 |\n+------+\n1 row in set (0.00 sec)\n','http://dev.mysql.com/doc/refman/5.5/en/repeat.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (233,39,'ALTER FUNCTION','Syntax:\nALTER FUNCTION func_name [characteristic ...]\n\ncharacteristic:\n COMMENT \'string\'\n | LANGUAGE SQL\n | { CONTAINS SQL | NO SQL | READS SQL DATA | MODIFIES SQL DATA }\n | SQL SECURITY { DEFINER | INVOKER }\n\nThis statement can be used to change the characteristics of a stored\nfunction. More than one change may be specified in an ALTER FUNCTION\nstatement. However, you cannot change the parameters or body of a\nstored function using this statement; to make such changes, you must\ndrop and re-create the function using DROP FUNCTION and CREATE\nFUNCTION.\n\nYou must have the ALTER ROUTINE privilege for the function. (That\nprivilege is granted automatically to the function creator.) If binary\nlogging is enabled, the ALTER FUNCTION statement might also require the\nSUPER privilege, as described in\nhttp://dev.mysql.com/doc/refman/5.5/en/stored-programs-logging.html.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/alter-function.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/alter-function.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (234,22,'SMALLINT','SMALLINT[(M)] [UNSIGNED] [ZEROFILL]\n\nA small integer. The signed range is -32768 to 32767. The unsigned\nrange is 0 to 65535.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/numeric-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/numeric-type-overview.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (235,22,'DOUBLE PRECISION','DOUBLE PRECISION[(M,D)] [UNSIGNED] [ZEROFILL], REAL[(M,D)] [UNSIGNED]\n[ZEROFILL]\n\nThese types are synonyms for DOUBLE. Exception: If the REAL_AS_FLOAT\nSQL mode is enabled, REAL is a synonym for FLOAT rather than DOUBLE.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/numeric-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/numeric-type-overview.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (236,37,'ORD','Syntax:\nORD(str)\n\nIf the leftmost character of the string str is a multi-byte character,\nreturns the code for that character, calculated from the numeric values\nof its constituent bytes using this formula:\n\n (1st byte code)\n+ (2nd byte code * 256)\n+ (3rd byte code * 2562) ...\n\nIf the leftmost character is not a multi-byte character, ORD() returns\nthe same value as the ASCII() function.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','mysql> SELECT ORD(\'2\');\n -> 50\n','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (237,8,'DEALLOCATE PREPARE','Syntax:\n{DEALLOCATE | DROP} PREPARE stmt_name\n\nTo deallocate a prepared statement produced with PREPARE, use a\nDEALLOCATE PREPARE statement that refers to the prepared statement\nname. Attempting to execute a prepared statement after deallocating it\nresults in an error.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/deallocate-prepare.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/deallocate-prepare.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (238,36,'ENVELOPE','Envelope(g)\n\nReturns the Minimum Bounding Rectangle (MBR) for the geometry value g.\nThe result is returned as a Polygon value.\n\nThe polygon is defined by the corner points of the bounding box:\n\nPOLYGON((MINX MINY, MAXX MINY, MAXX MAXY, MINX MAXY, MINX MINY))\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#general-geometry-property-functions\n\n','mysql> SELECT AsText(Envelope(GeomFromText(\'LineString(1 1,2 2)\')));\n+-------------------------------------------------------+\n| AsText(Envelope(GeomFromText(\'LineString(1 1,2 2)\'))) |\n+-------------------------------------------------------+\n| POLYGON((1 1,2 1,2 2,1 2,1 1)) |\n+-------------------------------------------------------+\n','http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#general-geometry-property-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (239,14,'IS_FREE_LOCK','Syntax:\nIS_FREE_LOCK(str)\n\nChecks whether the lock named str is free to use (that is, not locked).\nReturns 1 if the lock is free (no one is using the lock), 0 if the lock\nis in use, and NULL if an error occurs (such as an incorrect argument).\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/miscellaneous-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/miscellaneous-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (240,30,'TOUCHES','Touches(g1,g2)\n\nReturns 1 or 0 to indicate whether g1 spatially touches g2. Two\ngeometries spatially touch if the interiors of the geometries do not\nintersect, but the boundary of one of the geometries intersects either\nthe boundary or the interior of the other.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/functions-for-testing-spatial-relations-between-geometric-objects.html#functions-that-test-spatial-relationships-between-geometries\n\n','','http://dev.mysql.com/doc/refman/5.5/en/functions-for-testing-spatial-relations-between-geometric-objects.html#functions-that-test-spatial-relationships-between-geometries'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (241,14,'INET_ATON','Syntax:\nINET_ATON(expr)\n\nGiven the dotted-quad representation of an IPv4 network address as a\nstring, returns an integer that represents the numeric value of the\naddress in network byte order (big endian). INET_ATON() returns NULL if\nit does not understand its argument.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/miscellaneous-functions.html\n\n','mysql> SELECT INET_ATON(\'10.0.5.9\');\n -> 167773449\n','http://dev.mysql.com/doc/refman/5.5/en/miscellaneous-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (242,12,'UNCOMPRESS','Syntax:\nUNCOMPRESS(string_to_uncompress)\n\nUncompresses a string compressed by the COMPRESS() function. If the\nargument is not a compressed value, the result is NULL. This function\nrequires MySQL to have been compiled with a compression library such as\nzlib. Otherwise, the return value is always NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/encryption-functions.html\n\n','mysql> SELECT UNCOMPRESS(COMPRESS(\'any string\'));\n -> \'any string\'\nmysql> SELECT UNCOMPRESS(\'any string\');\n -> NULL\n','http://dev.mysql.com/doc/refman/5.5/en/encryption-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (243,22,'AUTO_INCREMENT','The AUTO_INCREMENT attribute can be used to generate a unique identity\nfor new rows:\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/example-auto-increment.html\n\n','CREATE TABLE animals (\n id MEDIUMINT NOT NULL AUTO_INCREMENT,\n name CHAR(30) NOT NULL,\n PRIMARY KEY (id)\n);\n\nINSERT INTO animals (name) VALUES\n (\'dog\'),(\'cat\'),(\'penguin\'),\n (\'lax\'),(\'whale\'),(\'ostrich\');\n\nSELECT * FROM animals;\n','http://dev.mysql.com/doc/refman/5.5/en/example-auto-increment.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (244,36,'ISSIMPLE','IsSimple(g)\n\nCurrently, this function is a placeholder and should not be used. If\nimplemented, its behavior will be as described in the next paragraph.\n\nReturns 1 if the geometry value g has no anomalous geometric points,\nsuch as self-intersection or self-tangency. IsSimple() returns 0 if the\nargument is not simple, and -1 if it is NULL.\n\nThe description of each instantiable geometric class given earlier in\nthe chapter includes the specific conditions that cause an instance of\nthat class to be classified as not simple. (See [HELP Geometry\nhierarchy].)\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#general-geometry-property-functions\n\n','','http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#general-geometry-property-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (245,4,'- BINARY','Syntax:\n-\n\nSubtraction:\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/arithmetic-functions.html\n\n','mysql> SELECT 3-5;\n -> -2\n','http://dev.mysql.com/doc/refman/5.5/en/arithmetic-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (246,3,'GEOMCOLLFROMTEXT','GeomCollFromText(wkt[,srid]), GeometryCollectionFromText(wkt[,srid])\n\nConstructs a GEOMETRYCOLLECTION value using its WKT representation and\nSRID.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-wkt-functions\n\n','','http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-wkt-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (247,3,'WKT DEFINITION','The Well-Known Text (WKT) representation of Geometry is designed to\nexchange geometry data in ASCII form. For a Backus-Naur grammar that\nspecifies the formal production rules for writing WKT values, see the\nOpenGIS specification document referenced in\nhttp://dev.mysql.com/doc/refman/5.5/en/spatial-extensions.html.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/gis-wkt-format.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/gis-wkt-format.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (248,31,'CURRENT_TIME','Syntax:\nCURRENT_TIME, CURRENT_TIME()\n\nCURRENT_TIME and CURRENT_TIME() are synonyms for CURTIME().\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (249,10,'REVOKE','Syntax:\nREVOKE\n priv_type [(column_list)]\n [, priv_type [(column_list)]] ...\n ON [object_type] priv_level\n FROM user [, user] ...\n\nREVOKE ALL PRIVILEGES, GRANT OPTION\n FROM user [, user] ...\n\nREVOKE PROXY ON user\n FROM user [, user] ...\n\nThe REVOKE statement enables system administrators to revoke privileges\nfrom MySQL accounts. Each account name uses the format described in\nhttp://dev.mysql.com/doc/refman/5.5/en/account-names.html. For example:\n\nREVOKE INSERT ON *.* FROM \'jeffrey\'@\'localhost\';\n\nIf you specify only the user name part of the account name, a host name\npart of \'%\' is used.\n\nFor details on the levels at which privileges exist, the permissible\npriv_type and priv_level values, and the syntax for specifying users\nand passwords, see [HELP GRANT]\n\nTo use the first REVOKE syntax, you must have the GRANT OPTION\nprivilege, and you must have the privileges that you are revoking.\n\nTo revoke all privileges, use the second syntax, which drops all\nglobal, database, table, column, and routine privileges for the named\nuser or users:\n\nREVOKE ALL PRIVILEGES, GRANT OPTION FROM user [, user] ...\n\nTo use this REVOKE syntax, you must have the global CREATE USER\nprivilege or the UPDATE privilege for the mysql database.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/revoke.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/revoke.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (250,17,'LAST_INSERT_ID','Syntax:\nLAST_INSERT_ID(), LAST_INSERT_ID(expr)\n\nLAST_INSERT_ID() (with no argument) returns a BIGINT (64-bit) value\nrepresenting the first automatically generated value successfully\ninserted for an AUTO_INCREMENT column as a result of the most recently\nexecuted INSERT statement. The value of LAST_INSERT_ID() remains\nunchanged if no rows are successfully inserted.\n\nFor example, after inserting a row that generates an AUTO_INCREMENT\nvalue, you can get the value like this:\n\nmysql> SELECT LAST_INSERT_ID();\n -> 195\n\nThe currently executing statement does not affect the value of\nLAST_INSERT_ID(). Suppose that you generate an AUTO_INCREMENT value\nwith one statement, and then refer to LAST_INSERT_ID() in a\nmultiple-row INSERT statement that inserts rows into a table with its\nown AUTO_INCREMENT column. The value of LAST_INSERT_ID() will remain\nstable in the second statement; its value for the second and later rows\nis not affected by the earlier row insertions. (However, if you mix\nreferences to LAST_INSERT_ID() and LAST_INSERT_ID(expr), the effect is\nundefined.)\n\nIf the previous statement returned an error, the value of\nLAST_INSERT_ID() is undefined. For transactional tables, if the\nstatement is rolled back due to an error, the value of LAST_INSERT_ID()\nis left undefined. For manual ROLLBACK, the value of LAST_INSERT_ID()\nis not restored to that before the transaction; it remains as it was at\nthe point of the ROLLBACK.\n\nWithin the body of a stored routine (procedure or function) or a\ntrigger, the value of LAST_INSERT_ID() changes the same way as for\nstatements executed outside the body of these kinds of objects. The\neffect of a stored routine or trigger upon the value of\nLAST_INSERT_ID() that is seen by following statements depends on the\nkind of routine:\n\no If a stored procedure executes statements that change the value of\n LAST_INSERT_ID(), the changed value is seen by statements that follow\n the procedure call.\n\no For stored functions and triggers that change the value, the value is\n restored when the function or trigger ends, so following statements\n will not see a changed value.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/information-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/information-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (251,31,'LAST_DAY','Syntax:\nLAST_DAY(date)\n\nTakes a date or datetime value and returns the corresponding value for\nthe last day of the month. Returns NULL if the argument is invalid.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT LAST_DAY(\'2003-02-05\');\n -> \'2003-02-28\'\nmysql> SELECT LAST_DAY(\'2004-02-05\');\n -> \'2004-02-29\'\nmysql> SELECT LAST_DAY(\'2004-01-01 01:01:01\');\n -> \'2004-01-31\'\nmysql> SELECT LAST_DAY(\'2003-03-32\');\n -> NULL\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (252,22,'MEDIUMINT','MEDIUMINT[(M)] [UNSIGNED] [ZEROFILL]\n\nA medium-sized integer. The signed range is -8388608 to 8388607. The\nunsigned range is 0 to 16777215.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/numeric-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/numeric-type-overview.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (253,4,'FLOOR','Syntax:\nFLOOR(X)\n\nReturns the largest integer value not greater than X.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html\n\n','mysql> SELECT FLOOR(1.23);\n -> 1\nmysql> SELECT FLOOR(-1.23);\n -> -2\n','http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (254,37,'RTRIM','Syntax:\nRTRIM(str)\n\nReturns the string str with trailing space characters removed.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','mysql> SELECT RTRIM(\'barbar \');\n -> \'barbar\'\n','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (255,28,'EXPLAIN','Syntax:\nEXPLAIN [explain_type] SELECT select_options\n\nexplain_type:\n EXTENDED\n | PARTITIONS\n\nOr:\n\nEXPLAIN tbl_name\n\nThe EXPLAIN statement can be used either as a way to obtain information\nabout how MySQL executes a statement, or as a synonym for DESCRIBE:\n\no When you precede a SELECT statement with the keyword EXPLAIN, MySQL\n displays information from the optimizer about the query execution\n plan. That is, MySQL explains how it would process the statement,\n including information about how tables are joined and in which order.\n EXPLAIN EXTENDED can be used to obtain additional information.\n\n For information about using EXPLAIN and EXPLAIN EXTENDED to obtain\n query execution plan information, see\n http://dev.mysql.com/doc/refman/5.5/en/using-explain.html.\n\no EXPLAIN PARTITIONS is useful only when examining queries involving\n partitioned tables. For details, see\n http://dev.mysql.com/doc/refman/5.5/en/partitioning-info.html.\n\no EXPLAIN tbl_name is synonymous with DESCRIBE tbl_name or SHOW COLUMNS\n FROM tbl_name. For information about DESCRIBE and SHOW COLUMNS, see\n [HELP DESCRIBE], and [HELP SHOW COLUMNS].\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/explain.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/explain.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (256,4,'DEGREES','Syntax:\nDEGREES(X)\n\nReturns the argument X, converted from radians to degrees.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html\n\n','mysql> SELECT DEGREES(PI());\n -> 180\nmysql> SELECT DEGREES(PI() / 2);\n -> 90\n','http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (257,22,'VARCHAR','[NATIONAL] VARCHAR(M) [CHARACTER SET charset_name] [COLLATE\ncollation_name]\n\nA variable-length string. M represents the maximum column length in\ncharacters. The range of M is 0 to 65,535. The effective maximum length\nof a VARCHAR is subject to the maximum row size (65,535 bytes, which is\nshared among all columns) and the character set used. For example, utf8\ncharacters can require up to three bytes per character, so a VARCHAR\ncolumn that uses the utf8 character set can be declared to be a maximum\nof 21,844 characters. See\nhttp://dev.mysql.com/doc/refman/5.5/en/column-count-limit.html.\n\nMySQL stores VARCHAR values as a 1-byte or 2-byte length prefix plus\ndata. The length prefix indicates the number of bytes in the value. A\nVARCHAR column uses one length byte if values require no more than 255\nbytes, two length bytes if values may require more than 255 bytes.\n\n*Note*: MySQL 5.5 follows the standard SQL specification, and does not\nremove trailing spaces from VARCHAR values.\n\nVARCHAR is shorthand for CHARACTER VARYING. NATIONAL VARCHAR is the\nstandard SQL way to define that a VARCHAR column should use some\npredefined character set. MySQL 4.1 and up uses utf8 as this predefined\ncharacter set.\nhttp://dev.mysql.com/doc/refman/5.5/en/charset-national.html. NVARCHAR\nis shorthand for NATIONAL VARCHAR.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/string-type-overview.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (258,37,'UNHEX','Syntax:\n\nUNHEX(str)\n\nFor a string argument str, UNHEX(str) performs the inverse operation of\nHEX(str). That is, it interprets each pair of characters in the\nargument as a hexadecimal number and converts it to the character\nrepresented by the number. The return value is a binary string.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','mysql> SELECT UNHEX(\'4D7953514C\');\n -> \'MySQL\'\nmysql> SELECT 0x4D7953514C;\n -> \'MySQL\'\nmysql> SELECT UNHEX(HEX(\'string\'));\n -> \'string\'\nmysql> SELECT HEX(UNHEX(\'1267\'));\n -> \'1267\'\n','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (259,4,'- UNARY','Syntax:\n-\n\nUnary minus. This operator changes the sign of the operand.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/arithmetic-functions.html\n\n','mysql> SELECT - 2;\n -> -2\n','http://dev.mysql.com/doc/refman/5.5/en/arithmetic-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (260,16,'STD','Syntax:\nSTD(expr)\n\nReturns the population standard deviation of expr. This is an extension\nto standard SQL. The standard SQL function STDDEV_POP() can be used\ninstead.\n\nThis function returns NULL if there were no matching rows.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/group-by-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/group-by-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (261,4,'COS','Syntax:\nCOS(X)\n\nReturns the cosine of X, where X is given in radians.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html\n\n','mysql> SELECT COS(PI());\n -> -1\n','http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (262,31,'DATE FUNCTION','Syntax:\nDATE(expr)\n\nExtracts the date part of the date or datetime expression expr.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT DATE(\'2003-12-31 01:02:03\');\n -> \'2003-12-31\'\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (263,39,'DROP TRIGGER','Syntax:\nDROP TRIGGER [IF EXISTS] [schema_name.]trigger_name\n\nThis statement drops a trigger. The schema (database) name is optional.\nIf the schema is omitted, the trigger is dropped from the default\nschema. DROP TRIGGER requires the TRIGGER privilege for the table\nassociated with the trigger.\n\nUse IF EXISTS to prevent an error from occurring for a trigger that\ndoes not exist. A NOTE is generated for a nonexistent trigger when\nusing IF EXISTS. See [HELP SHOW WARNINGS].\n\nTriggers for a table are also dropped if you drop the table.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/drop-trigger.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/drop-trigger.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (264,8,'RESET MASTER','Syntax:\nRESET MASTER\n\nDeletes all binary log files listed in the index file, resets the\nbinary log index file to be empty, and creates a new binary log file.\nThis statement is intended to be used only when the master is started\nfor the first time.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/reset-master.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/reset-master.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (265,4,'TAN','Syntax:\nTAN(X)\n\nReturns the tangent of X, where X is given in radians.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html\n\n','mysql> SELECT TAN(PI());\n -> -1.2246063538224e-16\nmysql> SELECT TAN(PI()+1);\n -> 1.5574077246549\n','http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (266,4,'PI','Syntax:\nPI()\n\nReturns the value of π (pi). The default number of decimal places\ndisplayed is seven, but MySQL uses the full double-precision value\ninternally.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html\n\n','mysql> SELECT PI();\n -> 3.141593\nmysql> SELECT PI()+0.000000000000000000;\n -> 3.141592653589793116\n','http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (267,31,'WEEKOFYEAR','Syntax:\nWEEKOFYEAR(date)\n\nReturns the calendar week of the date as a number in the range from 1\nto 53. WEEKOFYEAR() is a compatibility function that is equivalent to\nWEEK(date,3).\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT WEEKOFYEAR(\'2008-02-20\');\n -> 8\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (268,4,'/','Syntax:\n/\n\nDivision:\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/arithmetic-functions.html\n\n','mysql> SELECT 3/5;\n -> 0.60\n','http://dev.mysql.com/doc/refman/5.5/en/arithmetic-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (269,8,'PURGE BINARY LOGS','Syntax:\nPURGE { BINARY | MASTER } LOGS\n { TO \'log_name\' | BEFORE datetime_expr }\n\nThe binary log is a set of files that contain information about data\nmodifications made by the MySQL server. The log consists of a set of\nbinary log files, plus an index file (see\nhttp://dev.mysql.com/doc/refman/5.5/en/binary-log.html).\n\nThe PURGE BINARY LOGS statement deletes all the binary log files listed\nin the log index file prior to the specified log file name or date.\nBINARY and MASTER are synonyms. Deleted log files also are removed from\nthe list recorded in the index file, so that the given log file becomes\nthe first in the list.\n\nThis statement has no effect if the server was not started with the\n--log-bin option to enable binary logging.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/purge-binary-logs.html\n\n','PURGE BINARY LOGS TO \'mysql-bin.010\';\nPURGE BINARY LOGS BEFORE \'2008-04-02 22:46:26\';\n','http://dev.mysql.com/doc/refman/5.5/en/purge-binary-logs.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (270,16,'STDDEV_SAMP','Syntax:\nSTDDEV_SAMP(expr)\n\nReturns the sample standard deviation of expr (the square root of\nVAR_SAMP().\n\nSTDDEV_SAMP() returns NULL if there were no matching rows.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/group-by-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/group-by-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (271,17,'SCHEMA','Syntax:\nSCHEMA()\n\nThis function is a synonym for DATABASE().\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/information-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/information-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (272,32,'MLINEFROMWKB','MLineFromWKB(wkb[,srid]), MultiLineStringFromWKB(wkb[,srid])\n\nConstructs a MULTILINESTRING value using its WKB representation and\nSRID.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-wkb-functions\n\n','','http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-wkb-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (273,4,'LOG2','Syntax:\nLOG2(X)\n\nReturns the base-2 logarithm of X.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html\n\n','mysql> SELECT LOG2(65536);\n -> 16\nmysql> SELECT LOG2(-100);\n -> NULL\n','http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (274,31,'SUBTIME','Syntax:\nSUBTIME(expr1,expr2)\n\nSUBTIME() returns expr1 - expr2 expressed as a value in the same format\nas expr1. expr1 is a time or datetime expression, and expr2 is a time\nexpression.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT SUBTIME(\'2007-12-31 23:59:59.999999\',\'1 1:1:1.000002\');\n -> \'2007-12-30 22:58:58.999997\'\nmysql> SELECT SUBTIME(\'01:00:00.999999\', \'02:00:00.999998\');\n -> \'-00:59:59.999999\'\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (275,12,'UNCOMPRESSED_LENGTH','Syntax:\nUNCOMPRESSED_LENGTH(compressed_string)\n\nReturns the length that the compressed string had before being\ncompressed.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/encryption-functions.html\n\n','mysql> SELECT UNCOMPRESSED_LENGTH(COMPRESS(REPEAT(\'a\',30)));\n -> 30\n','http://dev.mysql.com/doc/refman/5.5/en/encryption-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (276,39,'DROP TABLE','Syntax:\nDROP [TEMPORARY] TABLE [IF EXISTS]\n tbl_name [, tbl_name] ...\n [RESTRICT | CASCADE]\n\nDROP TABLE removes one or more tables. You must have the DROP privilege\nfor each table. All table data and the table definition are removed, so\nbe careful with this statement! If any of the tables named in the\nargument list do not exist, MySQL returns an error indicating by name\nwhich nonexisting tables it was unable to drop, but it also drops all\nof the tables in the list that do exist.\n\n*Important*: When a table is dropped, user privileges on the table are\nnot automatically dropped. See [HELP GRANT].\n\nNote that for a partitioned table, DROP TABLE permanently removes the\ntable definition, all of its partitions, and all of the data which was\nstored in those partitions. It also removes the partitioning definition\n(.par) file associated with the dropped table.\n\nUse IF EXISTS to prevent an error from occurring for tables that do not\nexist. A NOTE is generated for each nonexistent table when using IF\nEXISTS. See [HELP SHOW WARNINGS].\n\nRESTRICT and CASCADE are permitted to make porting easier. In MySQL\n5.5, they do nothing.\n\n*Note*: DROP TABLE automatically commits the current active\ntransaction, unless you use the TEMPORARY keyword.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/drop-table.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/drop-table.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (277,4,'POW','Syntax:\nPOW(X,Y)\n\nReturns the value of X raised to the power of Y.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html\n\n','mysql> SELECT POW(2,2);\n -> 4\nmysql> SELECT POW(2,-2);\n -> 0.25\n','http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (278,26,'SHOW CREATE TABLE','Syntax:\nSHOW CREATE TABLE tbl_name\n\nShows the CREATE TABLE statement that creates the given table. To use\nthis statement, you must have some privilege for the table. This\nstatement also works with views.\nSHOW CREATE TABLE quotes table and column names according to the value\nof the sql_quote_show_create option. See\nhttp://dev.mysql.com/doc/refman/5.5/en/server-system-variables.html.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-create-table.html\n\n','mysql> SHOW CREATE TABLE t\\G\n*************************** 1. row ***************************\n Table: t\nCreate Table: CREATE TABLE t (\n id INT(11) default NULL auto_increment,\n s char(60) default NULL,\n PRIMARY KEY (id)\n) ENGINE=MyISAM\n','http://dev.mysql.com/doc/refman/5.5/en/show-create-table.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (279,27,'DUAL','You are permitted to specify DUAL as a dummy table name in situations\nwhere no tables are referenced:\n\nmysql> SELECT 1 + 1 FROM DUAL;\n -> 2\n\nDUAL is purely for the convenience of people who require that all\nSELECT statements should have FROM and possibly other clauses. MySQL\nmay ignore the clauses. MySQL does not require FROM DUAL if no tables\nare referenced.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/select.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/select.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (280,37,'INSTR','Syntax:\nINSTR(str,substr)\n\nReturns the position of the first occurrence of substring substr in\nstring str. This is the same as the two-argument form of LOCATE(),\nexcept that the order of the arguments is reversed.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','mysql> SELECT INSTR(\'foobarbar\', \'bar\');\n -> 4\nmysql> SELECT INSTR(\'xbar\', \'foobar\');\n -> 0\n','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (281,31,'NOW','Syntax:\nNOW()\n\nReturns the current date and time as a value in \'YYYY-MM-DD HH:MM:SS\'\nor YYYYMMDDHHMMSS.uuuuuu format, depending on whether the function is\nused in a string or numeric context. The value is expressed in the\ncurrent time zone.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT NOW();\n -> \'2007-12-15 23:50:26\'\nmysql> SELECT NOW() + 0;\n -> 20071215235026.000000\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (282,26,'SHOW ENGINES','Syntax:\nSHOW [STORAGE] ENGINES\n\nSHOW ENGINES displays status information about the server\'s storage\nengines. This is particularly useful for checking whether a storage\nengine is supported, or to see what the default engine is.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-engines.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/show-engines.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (283,18,'>=','Syntax:\n>=\n\nGreater than or equal:\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html\n\n','mysql> SELECT 2 >= 2;\n -> 1\n','http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (284,4,'EXP','Syntax:\nEXP(X)\n\nReturns the value of e (the base of natural logarithms) raised to the\npower of X. The inverse of this function is LOG() (using a single\nargument only) or LN().\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html\n\n','mysql> SELECT EXP(2);\n -> 7.3890560989307\nmysql> SELECT EXP(-2);\n -> 0.13533528323661\nmysql> SELECT EXP(0);\n -> 1\n','http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (285,22,'LONGBLOB','LONGBLOB\n\nA BLOB column with a maximum length of 4,294,967,295 or 4GB (232 - 1)\nbytes. The effective maximum length of LONGBLOB columns depends on the\nconfigured maximum packet size in the client/server protocol and\navailable memory. Each LONGBLOB value is stored using a 4-byte length\nprefix that indicates the number of bytes in the value.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/string-type-overview.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (286,13,'POINTN','PointN(ls,N)\n\nReturns the N-th Point in the Linestring value ls. Points are numbered\nbeginning with 1.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#linestring-property-functions\n\n','mysql> SET @ls = \'LineString(1 1,2 2,3 3)\';\nmysql> SELECT AsText(PointN(GeomFromText(@ls),2));\n+-------------------------------------+\n| AsText(PointN(GeomFromText(@ls),2)) |\n+-------------------------------------+\n| POINT(2 2) |\n+-------------------------------------+\n','http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#linestring-property-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (287,22,'YEAR DATA TYPE','YEAR[(2|4)]\n\nA year in two-digit or four-digit format. The default is four-digit\nformat. YEAR(2) or YEAR(4) differ in display format, but have the same\nrange of values. In four-digit format, values display as 1901 to 2155,\nand 0000. In two-digit format, values display as 70 to 69, representing\nyears from 1970 to 2069. MySQL displays YEAR values in YYYY or\nYYformat, but permits assignment of values to YEAR columns using either\nstrings or numbers.\n\n*Note*: The YEAR(2) data type has certain issues that you should\nconsider before choosing to use it. As of MySQL 5.5.27, YEAR(2) is\ndeprecated. For more information, see\nhttp://dev.mysql.com/doc/refman/5.5/en/migrating-to-year4.html.\n\nFor additional information about YEAR display format and inerpretation\nof input values, see http://dev.mysql.com/doc/refman/5.5/en/year.html.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-type-overview.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (288,16,'SUM','Syntax:\nSUM([DISTINCT] expr)\n\nReturns the sum of expr. If the return set has no rows, SUM() returns\nNULL. The DISTINCT keyword can be used to sum only the distinct values\nof expr.\n\nSUM() returns NULL if there were no matching rows.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/group-by-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/group-by-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (289,37,'OCT','Syntax:\nOCT(N)\n\nReturns a string representation of the octal value of N, where N is a\nlonglong (BIGINT) number. This is equivalent to CONV(N,10,8). Returns\nNULL if N is NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','mysql> SELECT OCT(12);\n -> \'14\'\n','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (290,31,'SYSDATE','Syntax:\nSYSDATE()\n\nReturns the current date and time as a value in \'YYYY-MM-DD HH:MM:SS\'\nor YYYYMMDDHHMMSS.uuuuuu format, depending on whether the function is\nused in a string or numeric context.\n\nSYSDATE() returns the time at which it executes. This differs from the\nbehavior for NOW(), which returns a constant time that indicates the\ntime at which the statement began to execute. (Within a stored function\nor trigger, NOW() returns the time at which the function or triggering\nstatement began to execute.)\n\nmysql> SELECT NOW(), SLEEP(2), NOW();\n+---------------------+----------+---------------------+\n| NOW() | SLEEP(2) | NOW() |\n+---------------------+----------+---------------------+\n| 2006-04-12 13:47:36 | 0 | 2006-04-12 13:47:36 |\n+---------------------+----------+---------------------+\n\nmysql> SELECT SYSDATE(), SLEEP(2), SYSDATE();\n+---------------------+----------+---------------------+\n| SYSDATE() | SLEEP(2) | SYSDATE() |\n+---------------------+----------+---------------------+\n| 2006-04-12 13:47:44 | 0 | 2006-04-12 13:47:46 |\n+---------------------+----------+---------------------+\n\nIn addition, the SET TIMESTAMP statement affects the value returned by\nNOW() but not by SYSDATE(). This means that timestamp settings in the\nbinary log have no effect on invocations of SYSDATE().\n\nBecause SYSDATE() can return different values even within the same\nstatement, and is not affected by SET TIMESTAMP, it is nondeterministic\nand therefore unsafe for replication if statement-based binary logging\nis used. If that is a problem, you can use row-based logging.\n\nAlternatively, you can use the --sysdate-is-now option to cause\nSYSDATE() to be an alias for NOW(). This works if the option is used on\nboth the master and the slave.\n\nThe nondeterministic nature of SYSDATE() also means that indexes cannot\nbe used for evaluating expressions that refer to it.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (291,5,'UNINSTALL PLUGIN','Syntax:\nUNINSTALL PLUGIN plugin_name\n\nThis statement removes an installed server plugin. It requires the\nDELETE privilege for the mysql.plugin table.\n\nplugin_name must be the name of some plugin that is listed in the\nmysql.plugin table. The server executes the plugin\'s deinitialization\nfunction and removes the row for the plugin from the mysql.plugin\ntable, so that subsequent server restarts will not load and initialize\nthe plugin. UNINSTALL PLUGIN does not remove the plugin\'s shared\nlibrary file.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/uninstall-plugin.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/uninstall-plugin.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (292,32,'ASBINARY','AsBinary(g), AsWKB(g)\n\nConverts a value in internal geometry format to its WKB representation\nand returns the binary result.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/functions-to-convert-geometries-between-formats.html\n\n','SELECT AsBinary(g) FROM geom;\n','http://dev.mysql.com/doc/refman/5.5/en/functions-to-convert-geometries-between-formats.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (293,37,'REPEAT FUNCTION','Syntax:\nREPEAT(str,count)\n\nReturns a string consisting of the string str repeated count times. If\ncount is less than 1, returns an empty string. Returns NULL if str or\ncount are NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','mysql> SELECT REPEAT(\'MySQL\', 3);\n -> \'MySQLMySQLMySQL\'\n','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (294,26,'SHOW TABLES','Syntax:\nSHOW [FULL] TABLES [{FROM | IN} db_name]\n [LIKE \'pattern\' | WHERE expr]\n\nSHOW TABLES lists the non-TEMPORARY tables in a given database. You can\nalso get this list using the mysqlshow db_name command. The LIKE\nclause, if present, indicates which table names to match. The WHERE\nclause can be given to select rows using more general conditions, as\ndiscussed in http://dev.mysql.com/doc/refman/5.5/en/extended-show.html.\n\nThis statement also lists any views in the database. The FULL modifier\nis supported such that SHOW FULL TABLES displays a second output\ncolumn. Values for the second column are BASE TABLE for a table and\nVIEW for a view.\n\nIf you have no privileges for a base table or view, it does not show up\nin the output from SHOW TABLES or mysqlshow db_name.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-tables.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/show-tables.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (295,31,'MAKEDATE','Syntax:\nMAKEDATE(year,dayofyear)\n\nReturns a date, given year and day-of-year values. dayofyear must be\ngreater than 0 or the result is NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT MAKEDATE(2011,31), MAKEDATE(2011,32);\n -> \'2011-01-31\', \'2011-02-01\'\nmysql> SELECT MAKEDATE(2011,365), MAKEDATE(2014,365);\n -> \'2011-12-31\', \'2014-12-31\'\nmysql> SELECT MAKEDATE(2011,0);\n -> NULL\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (296,37,'BINARY OPERATOR','Syntax:\nBINARY\n\nThe BINARY operator casts the string following it to a binary string.\nThis is an easy way to force a column comparison to be done byte by\nbyte rather than character by character. This causes the comparison to\nbe case sensitive even if the column is not defined as BINARY or BLOB.\nBINARY also causes trailing spaces to be significant.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/cast-functions.html\n\n','mysql> SELECT \'a\' = \'A\';\n -> 1\nmysql> SELECT BINARY \'a\' = \'A\';\n -> 0\nmysql> SELECT \'a\' = \'a \';\n -> 1\nmysql> SELECT BINARY \'a\' = \'a \';\n -> 0\n','http://dev.mysql.com/doc/refman/5.5/en/cast-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (297,6,'MBROVERLAPS','MBROverlaps(g1,g2)\n\nReturns 1 or 0 to indicate whether the Minimum Bounding Rectangles of\nthe two geometries g1 and g2 overlap. The term spatially overlaps is\nused if two geometries intersect and their intersection results in a\ngeometry of the same dimension but not equal to either of the given\ngeometries.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/functions-for-testing-spatial-relations-between-geometric-objects.html#relations-on-geometry-mbr\n\n','','http://dev.mysql.com/doc/refman/5.5/en/functions-for-testing-spatial-relations-between-geometric-objects.html#relations-on-geometry-mbr'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (298,37,'SOUNDEX','Syntax:\nSOUNDEX(str)\n\nReturns a soundex string from str. Two strings that sound almost the\nsame should have identical soundex strings. A standard soundex string\nis four characters long, but the SOUNDEX() function returns an\narbitrarily long string. You can use SUBSTRING() on the result to get a\nstandard soundex string. All nonalphabetic characters in str are\nignored. All international alphabetic characters outside the A-Z range\nare treated as vowels.\n\n*Important*: When using SOUNDEX(), you should be aware of the following\nlimitations:\n\no This function, as currently implemented, is intended to work well\n with strings that are in the English language only. Strings in other\n languages may not produce reliable results.\n\no This function is not guaranteed to provide consistent results with\n strings that use multi-byte character sets, including utf-8.\n\n We hope to remove these limitations in a future release. See Bug\n #22638 for more information.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','mysql> SELECT SOUNDEX(\'Hello\');\n -> \'H400\'\nmysql> SELECT SOUNDEX(\'Quadratically\');\n -> \'Q36324\'\n','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (299,6,'MBRTOUCHES','MBRTouches(g1,g2)\n\nReturns 1 or 0 to indicate whether the Minimum Bounding Rectangles of\nthe two geometries g1 and g2 touch. Two geometries spatially touch if\nthe interiors of the geometries do not intersect, but the boundary of\none of the geometries intersects either the boundary or the interior of\nthe other.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/functions-for-testing-spatial-relations-between-geometric-objects.html#relations-on-geometry-mbr\n\n','','http://dev.mysql.com/doc/refman/5.5/en/functions-for-testing-spatial-relations-between-geometric-objects.html#relations-on-geometry-mbr'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (300,39,'DROP EVENT','Syntax:\nDROP EVENT [IF EXISTS] event_name\n\nThis statement drops the event named event_name. The event immediately\nceases being active, and is deleted completely from the server.\n\nIf the event does not exist, the error ERROR 1517 (HY000): Unknown\nevent \'event_name\' results. You can override this and cause the\nstatement to generate a warning for nonexistent events instead using IF\nEXISTS.\n\nThis statement requires the EVENT privilege for the schema to which the\nevent to be dropped belongs.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/drop-event.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/drop-event.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (301,27,'INSERT SELECT','Syntax:\nINSERT [LOW_PRIORITY | HIGH_PRIORITY] [IGNORE]\n [INTO] tbl_name [(col_name,...)]\n SELECT ...\n [ ON DUPLICATE KEY UPDATE col_name=expr, ... ]\n\nWith INSERT ... SELECT, you can quickly insert many rows into a table\nfrom one or many tables. For example:\n\nINSERT INTO tbl_temp2 (fld_id)\n SELECT tbl_temp1.fld_order_id\n FROM tbl_temp1 WHERE tbl_temp1.fld_order_id > 100;\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/insert-select.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/insert-select.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (302,39,'CREATE PROCEDURE','Syntax:\nCREATE\n [DEFINER = { user | CURRENT_USER }]\n PROCEDURE sp_name ([proc_parameter[,...]])\n [characteristic ...] routine_body\n\nCREATE\n [DEFINER = { user | CURRENT_USER }]\n FUNCTION sp_name ([func_parameter[,...]])\n RETURNS type\n [characteristic ...] routine_body\n\nproc_parameter:\n [ IN | OUT | INOUT ] param_name type\n\nfunc_parameter:\n param_name type\n\ntype:\n Any valid MySQL data type\n\ncharacteristic:\n COMMENT \'string\'\n | LANGUAGE SQL\n | [NOT] DETERMINISTIC\n | { CONTAINS SQL | NO SQL | READS SQL DATA | MODIFIES SQL DATA }\n | SQL SECURITY { DEFINER | INVOKER }\n\nroutine_body:\n Valid SQL routine statement\n\nThese statements create stored routines. By default, a routine is\nassociated with the default database. To associate the routine\nexplicitly with a given database, specify the name as db_name.sp_name\nwhen you create it.\n\nThe CREATE FUNCTION statement is also used in MySQL to support UDFs\n(user-defined functions). See\nhttp://dev.mysql.com/doc/refman/5.5/en/adding-functions.html. A UDF can\nbe regarded as an external stored function. Stored functions share\ntheir namespace with UDFs. See\nhttp://dev.mysql.com/doc/refman/5.5/en/function-resolution.html, for\nthe rules describing how the server interprets references to different\nkinds of functions.\n\nTo invoke a stored procedure, use the CALL statement (see [HELP CALL]).\nTo invoke a stored function, refer to it in an expression. The function\nreturns a value during expression evaluation.\n\nCREATE PROCEDURE and CREATE FUNCTION require the CREATE ROUTINE\nprivilege. They might also require the SUPER privilege, depending on\nthe DEFINER value, as described later in this section. If binary\nlogging is enabled, CREATE FUNCTION might require the SUPER privilege,\nas described in\nhttp://dev.mysql.com/doc/refman/5.5/en/stored-programs-logging.html.\n\nBy default, MySQL automatically grants the ALTER ROUTINE and EXECUTE\nprivileges to the routine creator. This behavior can be changed by\ndisabling the automatic_sp_privileges system variable. See\nhttp://dev.mysql.com/doc/refman/5.5/en/stored-routines-privileges.html.\n\nThe DEFINER and SQL SECURITY clauses specify the security context to be\nused when checking access privileges at routine execution time, as\ndescribed later in this section.\n\nIf the routine name is the same as the name of a built-in SQL function,\na syntax error occurs unless you use a space between the name and the\nfollowing parenthesis when defining the routine or invoking it later.\nFor this reason, avoid using the names of existing SQL functions for\nyour own stored routines.\n\nThe IGNORE_SPACE SQL mode applies to built-in functions, not to stored\nroutines. It is always permissible to have spaces after a stored\nroutine name, regardless of whether IGNORE_SPACE is enabled.\n\nThe parameter list enclosed within parentheses must always be present.\nIf there are no parameters, an empty parameter list of () should be\nused. Parameter names are not case sensitive.\n\nEach parameter is an IN parameter by default. To specify otherwise for\na parameter, use the keyword OUT or INOUT before the parameter name.\n\n*Note*: Specifying a parameter as IN, OUT, or INOUT is valid only for a\nPROCEDURE. For a FUNCTION, parameters are always regarded as IN\nparameters.\n\nAn IN parameter passes a value into a procedure. The procedure might\nmodify the value, but the modification is not visible to the caller\nwhen the procedure returns. An OUT parameter passes a value from the\nprocedure back to the caller. Its initial value is NULL within the\nprocedure, and its value is visible to the caller when the procedure\nreturns. An INOUT parameter is initialized by the caller, can be\nmodified by the procedure, and any change made by the procedure is\nvisible to the caller when the procedure returns.\n\nFor each OUT or INOUT parameter, pass a user-defined variable in the\nCALL statement that invokes the procedure so that you can obtain its\nvalue when the procedure returns. If you are calling the procedure from\nwithin another stored procedure or function, you can also pass a\nroutine parameter or local routine variable as an IN or INOUT\nparameter.\n\nThe following example shows a simple stored procedure that uses an OUT\nparameter:\n\nmysql> delimiter //\n\nmysql> CREATE PROCEDURE simpleproc (OUT param1 INT)\n -> BEGIN\n -> SELECT COUNT(*) INTO param1 FROM t;\n -> END//\nQuery OK, 0 rows affected (0.00 sec)\n\nmysql> delimiter ;\n\nmysql> CALL simpleproc(@a);\nQuery OK, 0 rows affected (0.00 sec)\n\nmysql> SELECT @a;\n+------+\n| @a |\n+------+\n| 3 |\n+------+\n1 row in set (0.00 sec)\n\nThe example uses the mysql client delimiter command to change the\nstatement delimiter from ; to // while the procedure is being defined.\nThis enables the ; delimiter used in the procedure body to be passed\nthrough to the server rather than being interpreted by mysql itself.\nSee\nhttp://dev.mysql.com/doc/refman/5.5/en/stored-programs-defining.html.\n\nThe RETURNS clause may be specified only for a FUNCTION, for which it\nis mandatory. It indicates the return type of the function, and the\nfunction body must contain a RETURN value statement. If the RETURN\nstatement returns a value of a different type, the value is coerced to\nthe proper type. For example, if a function specifies an ENUM or SET\nvalue in the RETURNS clause, but the RETURN statement returns an\ninteger, the value returned from the function is the string for the\ncorresponding ENUM member of set of SET members.\n\nThe following example function takes a parameter, performs an operation\nusing an SQL function, and returns the result. In this case, it is\nunnecessary to use delimiter because the function definition contains\nno internal ; statement delimiters:\n\nmysql> CREATE FUNCTION hello (s CHAR(20))\nmysql> RETURNS CHAR(50) DETERMINISTIC\n -> RETURN CONCAT(\'Hello, \',s,\'!\');\nQuery OK, 0 rows affected (0.00 sec)\n\nmysql> SELECT hello(\'world\');\n+----------------+\n| hello(\'world\') |\n+----------------+\n| Hello, world! |\n+----------------+\n1 row in set (0.00 sec)\n\nParameter types and function return types can be declared to use any\nvalid data type, except that the COLLATE attribute cannot be used prior\nto MySQL 5.5.3. As of 5.5.3, COLLATE can be used if preceded by the\nCHARACTER SET attribute.\n\nThe routine_body consists of a valid SQL routine statement. This can be\na simple statement such as SELECT or INSERT, or a compound statement\nwritten using BEGIN and END. Compound statements can contain\ndeclarations, loops, and other control structure statements. The syntax\nfor these statements is described in\nhttp://dev.mysql.com/doc/refman/5.5/en/sql-syntax-compound-statements.h\ntml.\n\nMySQL permits routines to contain DDL statements, such as CREATE and\nDROP. MySQL also permits stored procedures (but not stored functions)\nto contain SQL transaction statements such as COMMIT. Stored functions\nmay not contain statements that perform explicit or implicit commit or\nrollback. Support for these statements is not required by the SQL\nstandard, which states that each DBMS vendor may decide whether to\npermit them.\n\nStatements that return a result set can be used within a stored\nprocedure but not within a stored function. This prohibition includes\nSELECT statements that do not have an INTO var_list clause and other\nstatements such as SHOW, EXPLAIN, and CHECK TABLE. For statements that\ncan be determined at function definition time to return a result set, a\nNot allowed to return a result set from a function error occurs\n(ER_SP_NO_RETSET). For statements that can be determined only at\nruntime to return a result set, a PROCEDURE %s can\'t return a result\nset in the given context error occurs (ER_SP_BADSELECT).\n\nUSE statements within stored routines are not permitted. When a routine\nis invoked, an implicit USE db_name is performed (and undone when the\nroutine terminates). The causes the routine to have the given default\ndatabase while it executes. References to objects in databases other\nthan the routine default database should be qualified with the\nappropriate database name.\n\nFor additional information about statements that are not permitted in\nstored routines, see\nhttp://dev.mysql.com/doc/refman/5.5/en/stored-program-restrictions.html\n.\n\nFor information about invoking stored procedures from within programs\nwritten in a language that has a MySQL interface, see [HELP CALL].\n\nMySQL stores the sql_mode system variable setting that is in effect at\nthe time a routine is created, and always executes the routine with\nthis setting in force, regardless of the server SQL mode in effect when\nthe routine is invoked.\n\nThe switch from the SQL mode of the invoker to that of the routine\noccurs after evaluation of arguments and assignment of the resulting\nvalues to routine parameters. If you define a routine in strict SQL\nmode but invoke it in nonstrict mode, assignment of arguments to\nroutine parameters does not take place in strict mode. If you require\nthat expressions passed to a routine be assigned in strict SQL mode,\nyou should invoke the routine with strict mode in effect.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/create-procedure.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/create-procedure.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (303,22,'VARBINARY','VARBINARY(M)\n\nThe VARBINARY type is similar to the VARCHAR type, but stores binary\nbyte strings rather than nonbinary character strings. M represents the\nmaximum column length in bytes.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/string-type-overview.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (304,26,'LOAD INDEX','Syntax:\nLOAD INDEX INTO CACHE\n tbl_index_list [, tbl_index_list] ...\n\ntbl_index_list:\n tbl_name\n [PARTITION (partition_list | ALL)]\n [[INDEX|KEY] (index_name[, index_name] ...)]\n [IGNORE LEAVES]\n\npartition_list:\n partition_name[, partition_name][, ...]\n\nThe LOAD INDEX INTO CACHE statement preloads a table index into the key\ncache to which it has been assigned by an explicit CACHE INDEX\nstatement, or into the default key cache otherwise.\n\nLOAD INDEX INTO CACHE is used only for MyISAM tables. In MySQL 5.5, it\nis also supported for partitioned MyISAM tables; in addition, indexes\non partitioned tables can be preloaded for one, several, or all\npartitions.\n\nThe IGNORE LEAVES modifier causes only blocks for the nonleaf nodes of\nthe index to be preloaded.\n\nIGNORE LEAVES is also supported for partitioned MyISAM tables.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/load-index.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/load-index.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (305,27,'UNION','Syntax:\nSELECT ...\nUNION [ALL | DISTINCT] SELECT ...\n[UNION [ALL | DISTINCT] SELECT ...]\n\nUNION is used to combine the result from multiple SELECT statements\ninto a single result set.\n\nThe column names from the first SELECT statement are used as the column\nnames for the results returned. Selected columns listed in\ncorresponding positions of each SELECT statement should have the same\ndata type. (For example, the first column selected by the first\nstatement should have the same type as the first column selected by the\nother statements.)\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/union.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/union.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (306,31,'TO_DAYS','Syntax:\nTO_DAYS(date)\n\nGiven a date date, returns a day number (the number of days since year\n0).\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT TO_DAYS(950501);\n -> 728779\nmysql> SELECT TO_DAYS(\'2007-10-07\');\n -> 733321\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (307,37,'NOT REGEXP','Syntax:\nexpr NOT REGEXP pat, expr NOT RLIKE pat\n\nThis is the same as NOT (expr REGEXP pat).\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/regexp.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/regexp.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (308,26,'SHOW INDEX','Syntax:\nSHOW {INDEX | INDEXES | KEYS}\n {FROM | IN} tbl_name\n [{FROM | IN} db_name]\n [WHERE expr]\n\nSHOW INDEX returns table index information. The format resembles that\nof the SQLStatistics call in ODBC. This statement requires some\nprivilege for any column in the table.\nYou can use db_name.tbl_name as an alternative to the tbl_name FROM\ndb_name syntax. These two statements are equivalent:\n\nSHOW INDEX FROM mytable FROM mydb;\nSHOW INDEX FROM mydb.mytable;\n\nThe WHERE clause can be given to select rows using more general\nconditions, as discussed in\nhttp://dev.mysql.com/doc/refman/5.5/en/extended-show.html.\n\nYou can also list a table\'s indexes with the mysqlshow -k db_name\ntbl_name command.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-index.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/show-index.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (309,26,'SHOW CREATE DATABASE','Syntax:\nSHOW CREATE {DATABASE | SCHEMA} [IF NOT EXISTS] db_name\n\nShows the CREATE DATABASE statement that creates the given database. If\nthe SHOW statement includes an IF NOT EXISTS clause, the output too\nincludes such a clause. SHOW CREATE SCHEMA is a synonym for SHOW CREATE\nDATABASE.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-create-database.html\n\n','mysql> SHOW CREATE DATABASE test\\G\n*************************** 1. row ***************************\n Database: test\nCreate Database: CREATE DATABASE `test`\n /*!40100 DEFAULT CHARACTER SET latin1 */\n\nmysql> SHOW CREATE SCHEMA test\\G\n*************************** 1. row ***************************\n Database: test\nCreate Database: CREATE DATABASE `test`\n /*!40100 DEFAULT CHARACTER SET latin1 */\n','http://dev.mysql.com/doc/refman/5.5/en/show-create-database.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (310,23,'LEAVE','Syntax:\nLEAVE label\n\nThis statement is used to exit the flow control construct that has the\ngiven label. If the label is for the outermost stored program block,\nLEAVE exits the program.\n\nLEAVE can be used within BEGIN ... END or loop constructs (LOOP,\nREPEAT, WHILE).\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/leave.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/leave.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (311,18,'NOT IN','Syntax:\nexpr NOT IN (value,...)\n\nThis is the same as NOT (expr IN (value,...)).\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (312,15,'!','Syntax:\nNOT, !\n\nLogical NOT. Evaluates to 1 if the operand is 0, to 0 if the operand is\nnonzero, and NOT NULL returns NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/logical-operators.html\n\n','mysql> SELECT NOT 10;\n -> 0\nmysql> SELECT NOT 0;\n -> 1\nmysql> SELECT NOT NULL;\n -> NULL\nmysql> SELECT ! (1+1);\n -> 0\nmysql> SELECT ! 1+1;\n -> 1\n','http://dev.mysql.com/doc/refman/5.5/en/logical-operators.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (313,23,'DECLARE HANDLER','Syntax:\nDECLARE handler_action HANDLER\n FOR condition_value [, condition_value] ...\n statement\n\nhandler_action:\n CONTINUE\n | EXIT\n | UNDO\n\ncondition_value:\n mysql_error_code\n | SQLSTATE [VALUE] sqlstate_value\n | condition_name\n | SQLWARNING\n | NOT FOUND\n | SQLEXCEPTION\n\nThe DECLARE ... HANDLER statement specifies a handler that deals with\none or more conditions. If one of these conditions occurs, the\nspecified statement executes. statement can be a simple statement such\nas SET var_name = value, or a compound statement written using BEGIN\nand END (see [HELP BEGIN END]).\n\nHandler declarations must appear after variable or condition\ndeclarations.\n\nThe handler_action value indicates what action the handler takes after\nexecution of the handler statement:\n\no CONTINUE: Execution of the current program continues.\n\no EXIT: Execution terminates for the BEGIN ... END compound statement\n in which the handler is declared. This is true even if the condition\n occurs in an inner block.\n\no UNDO: Not supported.\n\nThe condition_value for DECLARE ... HANDLER indicates the specific\ncondition or class of conditions that activates the handler:\n\no A MySQL error code (a number) or an SQLSTATE value (a 5-character\n string literal). You should not use MySQL error code 0 or SQLSTATE\n values that begin with \'00\', because those indicate success rather\n than an error condition. For a list of MySQL error codes and SQLSTATE\n values, see\n http://dev.mysql.com/doc/refman/5.5/en/error-messages-server.html.\n\no A condition name previously specified with DECLARE ... CONDITION. A\n condition name can be associated with a MySQL error code or SQLSTATE\n value. See [HELP DECLARE CONDITION].\n\no SQLWARNING is shorthand for the class of SQLSTATE values that begin\n with \'01\'.\n\no NOT FOUND is shorthand for the class of SQLSTATE values that begin\n with \'02\'. This is relevant within the context of cursors and is used\n to control what happens when a cursor reaches the end of a data set.\n If no more rows are available, a No Data condition occurs with\n SQLSTATE value \'02000\'. To detect this condition, you can set up a\n handler for it (or for a NOT FOUND condition). For an example, see\n http://dev.mysql.com/doc/refman/5.5/en/cursors.html. This condition\n also occurs for SELECT ... INTO var_list statements that retrieve no\n rows.\n\no SQLEXCEPTION is shorthand for the class of SQLSTATE values that do\n not begin with \'00\', \'01\', or \'02\'.\n\nIf a condition occurs for which no handler has been declared, the\naction taken depends on the condition class:\n\no For SQLEXCEPTION conditions, the stored program terminates at the\n statement that raised the condition, as if there were an EXIT\n handler. If the program was called by another stored program, the\n calling program handles the condition using the handler selection\n rules applied to its own handlers.\n\no For SQLWARNING conditions, the program continues executing, as if\n there were a CONTINUE handler.\n\no For NOT FOUND conditions, if the condition was raised normally, the\n action is CONTINUE. If it was raised by SIGNAL or RESIGNAL, the\n action is EXIT.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/declare-handler.html\n\n','mysql> CREATE TABLE test.t (s1 INT, PRIMARY KEY (s1));\nQuery OK, 0 rows affected (0.00 sec)\n\nmysql> delimiter //\n\nmysql> CREATE PROCEDURE handlerdemo ()\n -> BEGIN\n -> DECLARE CONTINUE HANDLER FOR SQLSTATE \'23000\' SET @x2 = 1;\n -> SET @x = 1;\n -> INSERT INTO test.t VALUES (1);\n -> SET @x = 2;\n -> INSERT INTO test.t VALUES (1);\n -> SET @x = 3;\n -> END;\n -> //\nQuery OK, 0 rows affected (0.00 sec)\n\nmysql> CALL handlerdemo()//\nQuery OK, 0 rows affected (0.00 sec)\n\nmysql> SELECT @x//\n +------+\n | @x |\n +------+\n | 3 |\n +------+\n 1 row in set (0.00 sec)\n','http://dev.mysql.com/doc/refman/5.5/en/declare-handler.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (314,22,'DOUBLE','DOUBLE[(M,D)] [UNSIGNED] [ZEROFILL]\n\nA normal-size (double-precision) floating-point number. Permissible\nvalues are -1.7976931348623157E+308 to -2.2250738585072014E-308, 0, and\n2.2250738585072014E-308 to 1.7976931348623157E+308. These are the\ntheoretical limits, based on the IEEE standard. The actual range might\nbe slightly smaller depending on your hardware or operating system.\n\nM is the total number of digits and D is the number of digits following\nthe decimal point. If M and D are omitted, values are stored to the\nlimits permitted by the hardware. A double-precision floating-point\nnumber is accurate to approximately 15 decimal places.\n\nUNSIGNED, if specified, disallows negative values.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/numeric-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/numeric-type-overview.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (315,22,'TIME','TIME\n\nA time. The range is \'-838:59:59\' to \'838:59:59\'. MySQL displays TIME\nvalues in \'HH:MM:SS\' format, but permits assignment of values to TIME\ncolumns using either strings or numbers.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-type-overview.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (316,15,'&&','Syntax:\nAND, &&\n\nLogical AND. Evaluates to 1 if all operands are nonzero and not NULL,\nto 0 if one or more operands are 0, otherwise NULL is returned.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/logical-operators.html\n\n','mysql> SELECT 1 && 1;\n -> 1\nmysql> SELECT 1 && 0;\n -> 0\nmysql> SELECT 1 && NULL;\n -> NULL\nmysql> SELECT 0 && NULL;\n -> 0\nmysql> SELECT NULL && 0;\n -> 0\n','http://dev.mysql.com/doc/refman/5.5/en/logical-operators.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (317,11,'X','X(p)\n\nReturns the X-coordinate value for the Point object p as a\ndouble-precision number.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#point-property-functions\n\n','mysql> SELECT X(POINT(56.7, 53.34));\n+-----------------------+\n| X(POINT(56.7, 53.34)) |\n+-----------------------+\n| 56.7 |\n+-----------------------+\n','http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#point-property-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (318,17,'SYSTEM_USER','Syntax:\nSYSTEM_USER()\n\nSYSTEM_USER() is a synonym for USER().\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/information-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/information-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (319,17,'FOUND_ROWS','Syntax:\nFOUND_ROWS()\n\nA SELECT statement may include a LIMIT clause to restrict the number of\nrows the server returns to the client. In some cases, it is desirable\nto know how many rows the statement would have returned without the\nLIMIT, but without running the statement again. To obtain this row\ncount, include a SQL_CALC_FOUND_ROWS option in the SELECT statement,\nand then invoke FOUND_ROWS() afterward:\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/information-functions.html\n\n','mysql> SELECT SQL_CALC_FOUND_ROWS * FROM tbl_name\n -> WHERE id > 100 LIMIT 10;\nmysql> SELECT FOUND_ROWS();\n','http://dev.mysql.com/doc/refman/5.5/en/information-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (320,30,'CROSSES','Crosses(g1,g2)\n\nReturns 1 if g1 spatially crosses g2. Returns NULL if g1 is a Polygon\nor a MultiPolygon, or if g2 is a Point or a MultiPoint. Otherwise,\nreturns 0.\n\nThe term spatially crosses denotes a spatial relation between two given\ngeometries that has the following properties:\n\no The two geometries intersect\n\no Their intersection results in a geometry that has a dimension that is\n one less than the maximum dimension of the two given geometries\n\no Their intersection is not equal to either of the two given geometries\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/functions-for-testing-spatial-relations-between-geometric-objects.html#functions-that-test-spatial-relationships-between-geometries\n\n','','http://dev.mysql.com/doc/refman/5.5/en/functions-for-testing-spatial-relations-between-geometric-objects.html#functions-that-test-spatial-relationships-between-geometries'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (321,39,'TRUNCATE TABLE','Syntax:\nTRUNCATE [TABLE] tbl_name\n\nTRUNCATE TABLE empties a table completely. It requires the DROP\nprivilege.\n\nLogically, TRUNCATE TABLE is similar to a DELETE statement that deletes\nall rows, or a sequence of DROP TABLE and CREATE TABLE statements. To\nachieve high performance, it bypasses the DML method of deleting data.\nThus, it cannot be rolled back, it does not cause ON DELETE triggers to\nfire, and it cannot be performed for InnoDB tables with parent-child\nforeign key relationships.\n\nAlthough TRUNCATE TABLE is similar to DELETE, it is classified as a DDL\nstatement rather than a DML statement. It differs from DELETE in the\nfollowing ways in MySQL 5.5:\n\no Truncate operations drop and re-create the table, which is much\n faster than deleting rows one by one, particularly for large tables.\n\no Truncate operations cause an implicit commit, and so cannot be rolled\n back.\n\no Truncation operations cannot be performed if the session holds an\n active table lock.\n\no TRUNCATE TABLE fails for an InnoDB table if there are any FOREIGN KEY\n constraints from other tables that reference the table. Foreign key\n constraints between columns of the same table are permitted.\n\no Truncation operations do not return a meaningful value for the number\n of deleted rows. The usual result is "0 rows affected," which should\n be interpreted as "no information."\n\no As long as the table format file tbl_name.frm is valid, the table can\n be re-created as an empty table with TRUNCATE TABLE, even if the data\n or index files have become corrupted.\n\no Any AUTO_INCREMENT value is reset to its start value. This is true\n even for MyISAM and InnoDB, which normally do not reuse sequence\n values.\n\no When used with partitioned tables, TRUNCATE TABLE preserves the\n partitioning; that is, the data and index files are dropped and\n re-created, while the partition definitions (.par) file is\n unaffected.\n\no The TRUNCATE TABLE statement does not invoke ON DELETE triggers.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/truncate-table.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/truncate-table.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (322,16,'BIT_XOR','Syntax:\nBIT_XOR(expr)\n\nReturns the bitwise XOR of all bits in expr. The calculation is\nperformed with 64-bit (BIGINT) precision.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/group-by-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/group-by-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (323,31,'CURRENT_DATE','Syntax:\nCURRENT_DATE, CURRENT_DATE()\n\nCURRENT_DATE and CURRENT_DATE() are synonyms for CURDATE().\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (324,8,'START SLAVE','Syntax:\nSTART SLAVE [thread_types]\n\nSTART SLAVE [SQL_THREAD] UNTIL\n MASTER_LOG_FILE = \'log_name\', MASTER_LOG_POS = log_pos\n\nSTART SLAVE [SQL_THREAD] UNTIL\n RELAY_LOG_FILE = \'log_name\', RELAY_LOG_POS = log_pos\n\nthread_types:\n [thread_type [, thread_type] ... ]\n\nthread_type: IO_THREAD | SQL_THREAD\n\nSTART SLAVE with no thread_type options starts both of the slave\nthreads. The I/O thread reads events from the master server and stores\nthem in the relay log. The SQL thread reads events from the relay log\nand executes them. START SLAVE requires the SUPER privilege.\n\nIf START SLAVE succeeds in starting the slave threads, it returns\nwithout any error. However, even in that case, it might be that the\nslave threads start and then later stop (for example, because they do\nnot manage to connect to the master or read its binary log, or some\nother problem). START SLAVE does not warn you about this. You must\ncheck the slave\'s error log for error messages generated by the slave\nthreads, or check that they are running satisfactorily with SHOW SLAVE\nSTATUS.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/start-slave.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/start-slave.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (325,2,'AREA','Area(poly)\n\nReturns as a double-precision number the area of the Polygon value\npoly, as measured in its spatial reference system.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#polygon-property-functions\n\n','mysql> SET @poly = \'Polygon((0 0,0 3,3 0,0 0),(1 1,1 2,2 1,1 1))\';\nmysql> SELECT Area(GeomFromText(@poly));\n+---------------------------+\n| Area(GeomFromText(@poly)) |\n+---------------------------+\n| 4 |\n+---------------------------+\n','http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#polygon-property-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (326,26,'FLUSH','Syntax:\nFLUSH [NO_WRITE_TO_BINLOG | LOCAL]\n flush_option [, flush_option] ...\n\nThe FLUSH statement has several variant forms that clear or reload\nvarious internal caches, flush tables, or acquire locks. To execute\nFLUSH, you must have the RELOAD privilege. Specific flush options might\nrequire additional privileges, as described later.\n\nBy default, the server writes FLUSH statements to the binary log so\nthat they replicate to replication slaves. To suppress logging, use the\noptional NO_WRITE_TO_BINLOG keyword or its alias LOCAL.\n\n*Note*: FLUSH LOGS, FLUSH MASTER, FLUSH SLAVE, and FLUSH TABLES WITH\nREAD LOCK (with or without a table list) are not written to the binary\nlog in any case because they would cause problems if replicated to a\nslave.\n\nThe FLUSH statement causes an implicit commit. See\nhttp://dev.mysql.com/doc/refman/5.5/en/implicit-commit.html.\n\nThe RESET statement is similar to FLUSH. See [HELP RESET], for\ninformation about using the RESET statement with replication.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/flush.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/flush.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (327,23,'BEGIN END','Syntax:\n[begin_label:] BEGIN\n [statement_list]\nEND [end_label]\n\nBEGIN ... END syntax is used for writing compound statements, which can\nappear within stored programs (stored procedures and functions,\ntriggers, and events). A compound statement can contain multiple\nstatements, enclosed by the BEGIN and END keywords. statement_list\nrepresents a list of one or more statements, each terminated by a\nsemicolon (;) statement delimiter. The statement_list itself is\noptional, so the empty compound statement (BEGIN END) is legal.\n\nBEGIN ... END blocks can be nested.\n\nUse of multiple statements requires that a client is able to send\nstatement strings containing the ; statement delimiter. In the mysql\ncommand-line client, this is handled with the delimiter command.\nChanging the ; end-of-statement delimiter (for example, to //) permit ;\nto be used in a program body. For an example, see\nhttp://dev.mysql.com/doc/refman/5.5/en/stored-programs-defining.html.\n\nA BEGIN ... END block can be labeled. See [HELP labels].\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/begin-end.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/begin-end.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (328,26,'SHOW PROCEDURE STATUS','Syntax:\nSHOW PROCEDURE STATUS\n [LIKE \'pattern\' | WHERE expr]\n\nThis statement is a MySQL extension. It returns characteristics of a\nstored procedure, such as the database, name, type, creator, creation\nand modification dates, and character set information. A similar\nstatement, SHOW FUNCTION STATUS, displays information about stored\nfunctions (see [HELP SHOW FUNCTION STATUS]).\n\nThe LIKE clause, if present, indicates which procedure or function\nnames to match. The WHERE clause can be given to select rows using more\ngeneral conditions, as discussed in\nhttp://dev.mysql.com/doc/refman/5.5/en/extended-show.html.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-procedure-status.html\n\n','mysql> SHOW PROCEDURE STATUS LIKE \'sp1\'\\G\n*************************** 1. row ***************************\n Db: test\n Name: sp1\n Type: PROCEDURE\n Definer: testuser@localhost\n Modified: 2004-08-03 15:29:37\n Created: 2004-08-03 15:29:37\n Security_type: DEFINER\n Comment:\ncharacter_set_client: latin1\ncollation_connection: latin1_swedish_ci\n Database Collation: latin1_swedish_ci\n','http://dev.mysql.com/doc/refman/5.5/en/show-procedure-status.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (329,28,'DESCRIBE','Syntax:\n{DESCRIBE | DESC} tbl_name [col_name | wild]\n\nDESCRIBE provides information about the columns in a table. It is a\nshortcut for SHOW COLUMNS FROM. These statements also display\ninformation for views. (See [HELP SHOW COLUMNS].)\n\ncol_name can be a column name, or a string containing the SQL "%" and\n"_" wildcard characters to obtain output only for the columns with\nnames matching the string. There is no need to enclose the string\nwithin quotation marks unless it contains spaces or other special\ncharacters.\n\nmysql> DESCRIBE City;\n+------------+----------+------+-----+---------+----------------+\n| Field | Type | Null | Key | Default | Extra |\n+------------+----------+------+-----+---------+----------------+\n| Id | int(11) | NO | PRI | NULL | auto_increment |\n| Name | char(35) | NO | | | |\n| Country | char(3) | NO | UNI | | |\n| District | char(20) | YES | MUL | | |\n| Population | int(11) | NO | | 0 | |\n+------------+----------+------+-----+---------+----------------+\n5 rows in set (0.00 sec)\n\nThe description for SHOW COLUMNS provides more information about the\noutput columns (see [HELP SHOW COLUMNS]).\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/describe.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/describe.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (330,26,'SHOW WARNINGS','Syntax:\nSHOW WARNINGS [LIMIT [offset,] row_count]\nSHOW COUNT(*) WARNINGS\n\nSHOW WARNINGS shows information about the conditions (errors, warnings,\nand notes) that resulted from the last statement in the current session\nthat generated messages. It shows nothing if the last statement used a\ntable and generated no messages. (That is, a statement that uses a\ntable but generates no messages clears the message list.) Statements\nthat do not use tables and do not generate messages have no effect on\nthe message list.\n\nWarnings are generated for DML statements such as INSERT, UPDATE, and\nLOAD DATA INFILE as well as DDL statements such as CREATE TABLE and\nALTER TABLE.\n\nSHOW WARNINGS is also used following EXPLAIN EXTENDED, to display the\nextra information generated by EXPLAIN when the EXTENDED keyword is\nused. See http://dev.mysql.com/doc/refman/5.5/en/explain-extended.html.\n\nThe LIMIT clause has the same syntax as for the SELECT statement. See\nhttp://dev.mysql.com/doc/refman/5.5/en/select.html.\n\nA related statement, SHOW ERRORS, shows only the error conditions (it\nexcludes warnings and notes). See [HELP SHOW ERRORS].\n\nThe SHOW COUNT(*) WARNINGS statement displays the total number of\nerrors, warnings, and notes. You can also retrieve this number from the\nwarning_count system variable:\n\nSHOW COUNT(*) WARNINGS;\nSELECT @@warning_count;\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-warnings.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/show-warnings.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (331,10,'DROP USER','Syntax:\nDROP USER user [, user] ...\n\nThe DROP USER statement removes one or more MySQL accounts and their\nprivileges. It removes privilege rows for the account from all grant\ntables. To use this statement, you must have the global CREATE USER\nprivilege or the DELETE privilege for the mysql database. Each account\nname uses the format described in\nhttp://dev.mysql.com/doc/refman/5.5/en/account-names.html. For example:\n\nDROP USER \'jeffrey\'@\'localhost\';\n\nIf you specify only the user name part of the account name, a host name\npart of \'%\' is used.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/drop-user.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/drop-user.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (332,16,'STDDEV_POP','Syntax:\nSTDDEV_POP(expr)\n\nReturns the population standard deviation of expr (the square root of\nVAR_POP()). You can also use STD() or STDDEV(), which are equivalent\nbut not standard SQL.\n\nSTDDEV_POP() returns NULL if there were no matching rows.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/group-by-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/group-by-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (333,26,'SHOW CHARACTER SET','Syntax:\nSHOW CHARACTER SET\n [LIKE \'pattern\' | WHERE expr]\n\nThe SHOW CHARACTER SET statement shows all available character sets.\nThe LIKE clause, if present, indicates which character set names to\nmatch. The WHERE clause can be given to select rows using more general\nconditions, as discussed in\nhttp://dev.mysql.com/doc/refman/5.5/en/extended-show.html. For example:\n\nmysql> SHOW CHARACTER SET LIKE \'latin%\';\n+---------+-----------------------------+-------------------+--------+\n| Charset | Description | Default collation | Maxlen |\n+---------+-----------------------------+-------------------+--------+\n| latin1 | cp1252 West European | latin1_swedish_ci | 1 |\n| latin2 | ISO 8859-2 Central European | latin2_general_ci | 1 |\n| latin5 | ISO 8859-9 Turkish | latin5_turkish_ci | 1 |\n| latin7 | ISO 8859-13 Baltic | latin7_general_ci | 1 |\n+---------+-----------------------------+-------------------+--------+\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-character-set.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/show-character-set.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (334,37,'SUBSTRING','Syntax:\nSUBSTRING(str,pos), SUBSTRING(str FROM pos), SUBSTRING(str,pos,len),\nSUBSTRING(str FROM pos FOR len)\n\nThe forms without a len argument return a substring from string str\nstarting at position pos. The forms with a len argument return a\nsubstring len characters long from string str, starting at position\npos. The forms that use FROM are standard SQL syntax. It is also\npossible to use a negative value for pos. In this case, the beginning\nof the substring is pos characters from the end of the string, rather\nthan the beginning. A negative value may be used for pos in any of the\nforms of this function.\n\nFor all forms of SUBSTRING(), the position of the first character in\nthe string from which the substring is to be extracted is reckoned as\n1.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','mysql> SELECT SUBSTRING(\'Quadratically\',5);\n -> \'ratically\'\nmysql> SELECT SUBSTRING(\'foobarbar\' FROM 4);\n -> \'barbar\'\nmysql> SELECT SUBSTRING(\'Quadratically\',5,6);\n -> \'ratica\'\nmysql> SELECT SUBSTRING(\'Sakila\', -3);\n -> \'ila\'\nmysql> SELECT SUBSTRING(\'Sakila\', -5, 3);\n -> \'aki\'\nmysql> SELECT SUBSTRING(\'Sakila\' FROM -4 FOR 2);\n -> \'ki\'\n','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (335,36,'ISEMPTY','IsEmpty(g)\n\nReturns 1 if the geometry value g is the empty geometry, 0 if it is not\nempty, and -1 if the argument is NULL. If the geometry is empty, it\nrepresents the empty point set.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#general-geometry-property-functions\n\n','','http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#general-geometry-property-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (336,26,'SHOW FUNCTION STATUS','Syntax:\nSHOW FUNCTION STATUS\n [LIKE \'pattern\' | WHERE expr]\n\nThis statement is similar to SHOW PROCEDURE STATUS but for stored\nfunctions. See [HELP SHOW PROCEDURE STATUS].\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-function-status.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/show-function-status.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (337,37,'LTRIM','Syntax:\nLTRIM(str)\n\nReturns the string str with leading space characters removed.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','mysql> SELECT LTRIM(\' barbar\');\n -> \'barbar\'\n','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (338,30,'INTERSECTS','Intersects(g1,g2)\n\nReturns 1 or 0 to indicate whether g1 spatially intersects g2.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/functions-for-testing-spatial-relations-between-geometric-objects.html#functions-that-test-spatial-relationships-between-geometries\n\n','','http://dev.mysql.com/doc/refman/5.5/en/functions-for-testing-spatial-relations-between-geometric-objects.html#functions-that-test-spatial-relationships-between-geometries'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (339,27,'CALL','Syntax:\nCALL sp_name([parameter[,...]])\nCALL sp_name[()]\n\nThe CALL statement invokes a stored procedure that was defined\npreviously with CREATE PROCEDURE.\n\nStored procedures that take no arguments can be invoked without\nparentheses. That is, CALL p() and CALL p are equivalent.\n\nCALL can pass back values to its caller using parameters that are\ndeclared as OUT or INOUT parameters. When the procedure returns, a\nclient program can also obtain the number of rows affected for the\nfinal statement executed within the routine: At the SQL level, call the\nROW_COUNT() function; from the C API, call the mysql_affected_rows()\nfunction.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/call.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/call.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (340,6,'MBRDISJOINT','MBRDisjoint(g1,g2)\n\nReturns 1 or 0 to indicate whether the Minimum Bounding Rectangles of\nthe two geometries g1 and g2 are disjoint (do not intersect).\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/functions-for-testing-spatial-relations-between-geometric-objects.html#relations-on-geometry-mbr\n\n','','http://dev.mysql.com/doc/refman/5.5/en/functions-for-testing-spatial-relations-between-geometric-objects.html#relations-on-geometry-mbr'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (341,14,'VALUES','Syntax:\nVALUES(col_name)\n\nIn an INSERT ... ON DUPLICATE KEY UPDATE statement, you can use the\nVALUES(col_name) function in the UPDATE clause to refer to column\nvalues from the INSERT portion of the statement. In other words,\nVALUES(col_name) in the UPDATE clause refers to the value of col_name\nthat would be inserted, had no duplicate-key conflict occurred. This\nfunction is especially useful in multiple-row inserts. The VALUES()\nfunction is meaningful only in the ON DUPLICATE KEY UPDATE clause of\nINSERT statements and returns NULL otherwise. See\nhttp://dev.mysql.com/doc/refman/5.5/en/insert-on-duplicate.html.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/miscellaneous-functions.html\n\n','mysql> INSERT INTO table (a,b,c) VALUES (1,2,3),(4,5,6)\n -> ON DUPLICATE KEY UPDATE c=VALUES(a)+VALUES(b);\n','http://dev.mysql.com/doc/refman/5.5/en/miscellaneous-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (342,37,'SUBSTRING_INDEX','Syntax:\nSUBSTRING_INDEX(str,delim,count)\n\nReturns the substring from string str before count occurrences of the\ndelimiter delim. If count is positive, everything to the left of the\nfinal delimiter (counting from the left) is returned. If count is\nnegative, everything to the right of the final delimiter (counting from\nthe right) is returned. SUBSTRING_INDEX() performs a case-sensitive\nmatch when searching for delim.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','mysql> SELECT SUBSTRING_INDEX(\'www.mysql.com\', \'.\', 2);\n -> \'www.mysql\'\nmysql> SELECT SUBSTRING_INDEX(\'www.mysql.com\', \'.\', -2);\n -> \'mysql.com\'\n','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (343,12,'ENCODE','Syntax:\nENCODE(str,pass_str)\n\nEncrypt str using pass_str as the password. To decrypt the result, use\nDECODE().\n\nThe result is a binary string of the same length as str.\n\nThe strength of the encryption is based on how good the random\ngenerator is. It should suffice for short strings.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/encryption-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/encryption-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (344,23,'LOOP','Syntax:\n[begin_label:] LOOP\n statement_list\nEND LOOP [end_label]\n\nLOOP implements a simple loop construct, enabling repeated execution of\nthe statement list, which consists of one or more statements, each\nterminated by a semicolon (;) statement delimiter. The statements\nwithin the loop are repeated until the loop is terminated. Usually,\nthis is accomplished with a LEAVE statement. Within a stored function,\nRETURN can also be used, which exits the function entirely.\n\nNeglecting to include a loop-termination statement results in an\ninfinite loop.\n\nA LOOP statement can be labeled. For the rules regarding label use, see\n[HELP labels].\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/loop.html\n\n','CREATE PROCEDURE doiterate(p1 INT)\nBEGIN\n label1: LOOP\n SET p1 = p1 + 1;\n IF p1 < 10 THEN\n ITERATE label1;\n END IF;\n LEAVE label1;\n END LOOP label1;\n SET @x = p1;\nEND;\n','http://dev.mysql.com/doc/refman/5.5/en/loop.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (345,4,'TRUNCATE','Syntax:\nTRUNCATE(X,D)\n\nReturns the number X, truncated to D decimal places. If D is 0, the\nresult has no decimal point or fractional part. D can be negative to\ncause D digits left of the decimal point of the value X to become zero.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html\n\n','mysql> SELECT TRUNCATE(1.223,1);\n -> 1.2\nmysql> SELECT TRUNCATE(1.999,1);\n -> 1.9\nmysql> SELECT TRUNCATE(1.999,0);\n -> 1\nmysql> SELECT TRUNCATE(-1.999,1);\n -> -1.9\nmysql> SELECT TRUNCATE(122,-2);\n -> 100\nmysql> SELECT TRUNCATE(10.28*100,0);\n -> 1028\n','http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (346,31,'TIMESTAMPADD','Syntax:\nTIMESTAMPADD(unit,interval,datetime_expr)\n\nAdds the integer expression interval to the date or datetime expression\ndatetime_expr. The unit for interval is given by the unit argument,\nwhich should be one of the following values: MICROSECOND\n(microseconds), SECOND, MINUTE, HOUR, DAY, WEEK, MONTH, QUARTER, or\nYEAR.\n\nIt is possible to use FRAC_SECOND in place of MICROSECOND, but\nFRAC_SECOND is deprecated. FRAC_SECOND was removed in MySQL 5.5.3.\n\nThe unit value may be specified using one of keywords as shown, or with\na prefix of SQL_TSI_. For example, DAY and SQL_TSI_DAY both are legal.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT TIMESTAMPADD(MINUTE,1,\'2003-01-02\');\n -> \'2003-01-02 00:01:00\'\nmysql> SELECT TIMESTAMPADD(WEEK,1,\'2003-01-02\');\n -> \'2003-01-09\'\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (347,26,'SHOW','SHOW has many forms that provide information about databases, tables,\ncolumns, or status information about the server. This section describes\nthose following:\n\nSHOW AUTHORS\nSHOW {BINARY | MASTER} LOGS\nSHOW BINLOG EVENTS [IN \'log_name\'] [FROM pos] [LIMIT [offset,] row_count]\nSHOW CHARACTER SET [like_or_where]\nSHOW COLLATION [like_or_where]\nSHOW [FULL] COLUMNS FROM tbl_name [FROM db_name] [like_or_where]\nSHOW CONTRIBUTORS\nSHOW CREATE DATABASE db_name\nSHOW CREATE EVENT event_name\nSHOW CREATE FUNCTION func_name\nSHOW CREATE PROCEDURE proc_name\nSHOW CREATE TABLE tbl_name\nSHOW CREATE TRIGGER trigger_name\nSHOW CREATE VIEW view_name\nSHOW DATABASES [like_or_where]\nSHOW ENGINE engine_name {STATUS | MUTEX}\nSHOW [STORAGE] ENGINES\nSHOW ERRORS [LIMIT [offset,] row_count]\nSHOW EVENTS\nSHOW FUNCTION CODE func_name\nSHOW FUNCTION STATUS [like_or_where]\nSHOW GRANTS FOR user\nSHOW INDEX FROM tbl_name [FROM db_name]\nSHOW MASTER STATUS\nSHOW OPEN TABLES [FROM db_name] [like_or_where]\nSHOW PLUGINS\nSHOW PROCEDURE CODE proc_name\nSHOW PROCEDURE STATUS [like_or_where]\nSHOW PRIVILEGES\nSHOW [FULL] PROCESSLIST\nSHOW PROFILE [types] [FOR QUERY n] [OFFSET n] [LIMIT n]\nSHOW PROFILES\nSHOW SLAVE HOSTS\nSHOW SLAVE STATUS\nSHOW [GLOBAL | SESSION] STATUS [like_or_where]\nSHOW TABLE STATUS [FROM db_name] [like_or_where]\nSHOW [FULL] TABLES [FROM db_name] [like_or_where]\nSHOW TRIGGERS [FROM db_name] [like_or_where]\nSHOW [GLOBAL | SESSION] VARIABLES [like_or_where]\nSHOW WARNINGS [LIMIT [offset,] row_count]\n\nlike_or_where:\n LIKE \'pattern\'\n | WHERE expr\n\nIf the syntax for a given SHOW statement includes a LIKE \'pattern\'\npart, \'pattern\' is a string that can contain the SQL "%" and "_"\nwildcard characters. The pattern is useful for restricting statement\noutput to matching values.\n\nSeveral SHOW statements also accept a WHERE clause that provides more\nflexibility in specifying which rows to display. See\nhttp://dev.mysql.com/doc/refman/5.5/en/extended-show.html.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/show.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (348,18,'GREATEST','Syntax:\nGREATEST(value1,value2,...)\n\nWith two or more arguments, returns the largest (maximum-valued)\nargument. The arguments are compared using the same rules as for\nLEAST().\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html\n\n','mysql> SELECT GREATEST(2,0);\n -> 2\nmysql> SELECT GREATEST(34.0,3.0,5.0,767.0);\n -> 767.0\nmysql> SELECT GREATEST(\'B\',\'A\',\'C\');\n -> \'C\'\n','http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (349,26,'SHOW VARIABLES','Syntax:\nSHOW [GLOBAL | SESSION] VARIABLES\n [LIKE \'pattern\' | WHERE expr]\n\nSHOW VARIABLES shows the values of MySQL system variables. This\ninformation also can be obtained using the mysqladmin variables\ncommand. The LIKE clause, if present, indicates which variable names to\nmatch. The WHERE clause can be given to select rows using more general\nconditions, as discussed in\nhttp://dev.mysql.com/doc/refman/5.5/en/extended-show.html. This\nstatement does not require any privilege. It requires only the ability\nto connect to the server.\n\nWith the GLOBAL modifier, SHOW VARIABLES displays the values that are\nused for new connections to MySQL. As of MySQL 5.5.3, if a variable has\nno global value, no value is displayed. Before 5.5.3, the session value\nis displayed. With SESSION, SHOW VARIABLES displays the values that are\nin effect for the current connection. If no modifier is present, the\ndefault is SESSION. LOCAL is a synonym for SESSION.\nWith a LIKE clause, the statement displays only rows for those\nvariables with names that match the pattern. To obtain the row for a\nspecific variable, use a LIKE clause as shown:\n\nSHOW VARIABLES LIKE \'max_join_size\';\nSHOW SESSION VARIABLES LIKE \'max_join_size\';\n\nTo get a list of variables whose name match a pattern, use the "%"\nwildcard character in a LIKE clause:\n\nSHOW VARIABLES LIKE \'%size%\';\nSHOW GLOBAL VARIABLES LIKE \'%size%\';\n\nWildcard characters can be used in any position within the pattern to\nbe matched. Strictly speaking, because "_" is a wildcard that matches\nany single character, you should escape it as "\\_" to match it\nliterally. In practice, this is rarely necessary.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-variables.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/show-variables.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (350,26,'BINLOG','Syntax:\nBINLOG \'str\'\n\nBINLOG is an internal-use statement. It is generated by the mysqlbinlog\nprogram as the printable representation of certain events in binary log\nfiles. (See http://dev.mysql.com/doc/refman/5.5/en/mysqlbinlog.html.)\nThe \'str\' value is a base 64-encoded string the that server decodes to\ndetermine the data change indicated by the corresponding event. This\nstatement requires the SUPER privilege.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/binlog.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/binlog.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (351,16,'BIT_AND','Syntax:\nBIT_AND(expr)\n\nReturns the bitwise AND of all bits in expr. The calculation is\nperformed with 64-bit (BIGINT) precision.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/group-by-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/group-by-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (352,31,'SECOND','Syntax:\nSECOND(time)\n\nReturns the second for time, in the range 0 to 59.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT SECOND(\'10:05:03\');\n -> 3\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (353,4,'ATAN2','Syntax:\nATAN(Y,X), ATAN2(Y,X)\n\nReturns the arc tangent of the two variables X and Y. It is similar to\ncalculating the arc tangent of Y / X, except that the signs of both\narguments are used to determine the quadrant of the result.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html\n\n','mysql> SELECT ATAN(-2,2);\n -> -0.78539816339745\nmysql> SELECT ATAN2(PI(),0);\n -> 1.5707963267949\n','http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (354,6,'MBRCONTAINS','MBRContains(g1,g2)\n\nReturns 1 or 0 to indicate whether the Minimum Bounding Rectangle of g1\ncontains the Minimum Bounding Rectangle of g2. This tests the opposite\nrelationship as MBRWithin().\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/functions-for-testing-spatial-relations-between-geometric-objects.html#relations-on-geometry-mbr\n\n','mysql> SET @g1 = GeomFromText(\'Polygon((0 0,0 3,3 3,3 0,0 0))\');\nmysql> SET @g2 = GeomFromText(\'Point(1 1)\');\nmysql> SELECT MBRContains(@g1,@g2), MBRContains(@g2,@g1);\n----------------------+----------------------+\n| MBRContains(@g1,@g2) | MBRContains(@g2,@g1) |\n+----------------------+----------------------+\n| 1 | 0 |\n+----------------------+----------------------+\n','http://dev.mysql.com/doc/refman/5.5/en/functions-for-testing-spatial-relations-between-geometric-objects.html#relations-on-geometry-mbr'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (355,31,'HOUR','Syntax:\nHOUR(time)\n\nReturns the hour for time. The range of the return value is 0 to 23 for\ntime-of-day values. However, the range of TIME values actually is much\nlarger, so HOUR can return values greater than 23.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT HOUR(\'10:05:03\');\n -> 10\nmysql> SELECT HOUR(\'272:59:59\');\n -> 272\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (356,27,'SELECT','Syntax:\nSELECT\n [ALL | DISTINCT | DISTINCTROW ]\n [HIGH_PRIORITY]\n [STRAIGHT_JOIN]\n [SQL_SMALL_RESULT] [SQL_BIG_RESULT] [SQL_BUFFER_RESULT]\n [SQL_CACHE | SQL_NO_CACHE] [SQL_CALC_FOUND_ROWS]\n select_expr [, select_expr ...]\n [FROM table_references\n [WHERE where_condition]\n [GROUP BY {col_name | expr | position}\n [ASC | DESC], ... [WITH ROLLUP]]\n [HAVING where_condition]\n [ORDER BY {col_name | expr | position}\n [ASC | DESC], ...]\n [LIMIT {[offset,] row_count | row_count OFFSET offset}]\n [PROCEDURE procedure_name(argument_list)]\n [INTO OUTFILE \'file_name\'\n [CHARACTER SET charset_name]\n export_options\n | INTO DUMPFILE \'file_name\'\n | INTO var_name [, var_name]]\n [FOR UPDATE | LOCK IN SHARE MODE]]\n\nSELECT is used to retrieve rows selected from one or more tables, and\ncan include UNION statements and subqueries. See [HELP UNION], and\nhttp://dev.mysql.com/doc/refman/5.5/en/subqueries.html.\n\nThe most commonly used clauses of SELECT statements are these:\n\no Each select_expr indicates a column that you want to retrieve. There\n must be at least one select_expr.\n\no table_references indicates the table or tables from which to retrieve\n rows. Its syntax is described in [HELP JOIN].\n\no The WHERE clause, if given, indicates the condition or conditions\n that rows must satisfy to be selected. where_condition is an\n expression that evaluates to true for each row to be selected. The\n statement selects all rows if there is no WHERE clause.\n\n In the WHERE expression, you can use any of the functions and\n operators that MySQL supports, except for aggregate (summary)\n functions. See\n http://dev.mysql.com/doc/refman/5.5/en/expressions.html, and\n http://dev.mysql.com/doc/refman/5.5/en/functions.html.\n\nSELECT can also be used to retrieve rows computed without reference to\nany table.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/select.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/select.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (357,4,'COT','Syntax:\nCOT(X)\n\nReturns the cotangent of X.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html\n\n','mysql> SELECT COT(12);\n -> -1.5726734063977\nmysql> SELECT COT(0);\n -> NULL\n','http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (358,26,'SHOW CREATE EVENT','Syntax:\nSHOW CREATE EVENT event_name\n\nThis statement displays the CREATE EVENT statement needed to re-create\na given event. It requires the EVENT privilege for the database from\nwhich the event is to be shown. For example (using the same event\ne_daily defined and then altered in [HELP SHOW EVENTS]):\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-create-event.html\n\n','mysql> SHOW CREATE EVENT test.e_daily\\G\n*************************** 1. row ***************************\n Event: e_daily\n sql_mode:\n time_zone: SYSTEM\n Create Event: CREATE EVENT `e_daily`\n ON SCHEDULE EVERY 1 DAY\n STARTS CURRENT_TIMESTAMP + INTERVAL 6 HOUR\n ON COMPLETION NOT PRESERVE\n ENABLE\n COMMENT \'Saves total number of sessions then\n clears the table each day\'\n DO BEGIN\n INSERT INTO site_activity.totals (time, total)\n SELECT CURRENT_TIMESTAMP, COUNT(*)\n FROM site_activity.sessions;\n DELETE FROM site_activity.sessions;\n END\ncharacter_set_client: latin1\ncollation_connection: latin1_swedish_ci\n Database Collation: latin1_swedish_ci\n','http://dev.mysql.com/doc/refman/5.5/en/show-create-event.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (359,37,'LOAD_FILE','Syntax:\nLOAD_FILE(file_name)\n\nReads the file and returns the file contents as a string. To use this\nfunction, the file must be located on the server host, you must specify\nthe full path name to the file, and you must have the FILE privilege.\nThe file must be readable by all and its size less than\nmax_allowed_packet bytes. If the secure_file_priv system variable is\nset to a nonempty directory name, the file to be loaded must be located\nin that directory.\n\nIf the file does not exist or cannot be read because one of the\npreceding conditions is not satisfied, the function returns NULL.\n\nThe character_set_filesystem system variable controls interpretation of\nfile names that are given as literal strings.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','mysql> UPDATE t\n SET blob_col=LOAD_FILE(\'/tmp/picture\')\n WHERE id=1;\n','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (360,3,'POINTFROMTEXT','PointFromText(wkt[,srid])\n\nConstructs a POINT value using its WKT representation and SRID.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-wkt-functions\n\n','','http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-wkt-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (361,16,'GROUP_CONCAT','Syntax:\nGROUP_CONCAT(expr)\n\nThis function returns a string result with the concatenated non-NULL\nvalues from a group. It returns NULL if there are no non-NULL values.\nThe full syntax is as follows:\n\nGROUP_CONCAT([DISTINCT] expr [,expr ...]\n [ORDER BY {unsigned_integer | col_name | expr}\n [ASC | DESC] [,col_name ...]]\n [SEPARATOR str_val])\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/group-by-functions.html\n\n','mysql> SELECT student_name,\n -> GROUP_CONCAT(test_score)\n -> FROM student\n -> GROUP BY student_name;\n','http://dev.mysql.com/doc/refman/5.5/en/group-by-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (362,31,'DATE_FORMAT','Syntax:\nDATE_FORMAT(date,format)\n\nFormats the date value according to the format string.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT DATE_FORMAT(\'2009-10-04 22:23:00\', \'%W %M %Y\');\n -> \'Sunday October 2009\'\nmysql> SELECT DATE_FORMAT(\'2007-10-04 22:23:00\', \'%H:%i:%s\');\n -> \'22:23:00\'\nmysql> SELECT DATE_FORMAT(\'1900-10-04 22:23:00\',\n -> \'%D %y %a %d %m %b %j\');\n -> \'4th 00 Thu 04 10 Oct 277\'\nmysql> SELECT DATE_FORMAT(\'1997-10-04 22:23:00\',\n -> \'%H %k %I %r %T %S %w\');\n -> \'22 22 10 10:23:00 PM 22:23:00 00 6\'\nmysql> SELECT DATE_FORMAT(\'1999-01-01\', \'%X %V\');\n -> \'1998 52\'\nmysql> SELECT DATE_FORMAT(\'2006-06-00\', \'%d\');\n -> \'00\'\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (363,17,'BENCHMARK','Syntax:\nBENCHMARK(count,expr)\n\nThe BENCHMARK() function executes the expression expr repeatedly count\ntimes. It may be used to time how quickly MySQL processes the\nexpression. The result value is always 0. The intended use is from\nwithin the mysql client, which reports query execution times:\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/information-functions.html\n\n','mysql> SELECT BENCHMARK(1000000,ENCODE(\'hello\',\'goodbye\'));\n+----------------------------------------------+\n| BENCHMARK(1000000,ENCODE(\'hello\',\'goodbye\')) |\n+----------------------------------------------+\n| 0 |\n+----------------------------------------------+\n1 row in set (4.74 sec)\n','http://dev.mysql.com/doc/refman/5.5/en/information-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (364,31,'YEAR','Syntax:\nYEAR(date)\n\nReturns the year for date, in the range 1000 to 9999, or 0 for the\n"zero" date.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT YEAR(\'1987-01-01\');\n -> 1987\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (365,26,'SHOW ENGINE','Syntax:\nSHOW ENGINE engine_name {STATUS | MUTEX}\n\nSHOW ENGINE displays operational information about a storage engine.\nThe following statements currently are supported:\n\nSHOW ENGINE INNODB STATUS\nSHOW ENGINE INNODB MUTEX\nSHOW ENGINE {NDB | NDBCLUSTER} STATUS\nSHOW ENGINE PERFORMANCE_SCHEMA STATUS\n\nSHOW ENGINE INNODB STATUS displays extensive information from the\nstandard InnoDB Monitor about the state of the InnoDB storage engine.\nFor information about the standard monitor and other InnoDB Monitors\nthat provide information about InnoDB processing, see\nhttp://dev.mysql.com/doc/refman/5.5/en/innodb-monitors.html.\n\nSHOW ENGINE INNODB MUTEX displays InnoDB mutex statistics. The\nstatement displays the following fields:\n\no Type\n\n Always InnoDB.\n\no Name\n\n The source file where the mutex is implemented, and the line number\n in the file where the mutex is created. The line number may change\n depending on your version of MySQL.\n\no Status\n\n The mutex status. This field displays several values if UNIV_DEBUG\n was defined at MySQL compilation time (for example, in include/univ.i\n in the InnoDB part of the MySQL source tree). If UNIV_DEBUG was not\n defined, the statement displays only the os_waits value. In the\n latter case (without UNIV_DEBUG), the information on which the output\n is based is insufficient to distinguish regular mutexes and mutexes\n that protect rw-locks (which permit multiple readers or a single\n writer). Consequently, the output may appear to contain multiple rows\n for the same mutex.\n\n o count indicates how many times the mutex was requested.\n\n o spin_waits indicates how many times the spinlock had to run.\n\n o spin_rounds indicates the number of spinlock rounds. (spin_rounds\n divided by spin_waits provides the average round count.)\n\n o os_waits indicates the number of operating system waits. This\n occurs when the spinlock did not work (the mutex was not locked\n during the spinlock and it was necessary to yield to the operating\n system and wait).\n\n o os_yields indicates the number of times a the thread trying to lock\n a mutex gave up its timeslice and yielded to the operating system\n (on the presumption that permitting other threads to run will free\n the mutex so that it can be locked).\n\n o os_wait_times indicates the amount of time (in ms) spent in\n operating system waits, if the timed_mutexes system variable is 1\n (ON). If timed_mutexes is 0 (OFF), timing is disabled, so\n os_wait_times is 0. timed_mutexes is off by default.\n\nInformation from this statement can be used to diagnose system\nproblems. For example, large values of spin_waits and spin_rounds may\nindicate scalability problems.\n\nUse SHOW ENGINE PERFORMANCE_SCHEMA STATUS to inspect the internal\noperation of the Performance Schema code:\n\nmysql> SHOW ENGINE PERFORMANCE_SCHEMA STATUS\\G\n...\n*************************** 3. row ***************************\n Type: performance_schema\n Name: events_waits_history.row_size\nStatus: 76\n*************************** 4. row ***************************\n Type: performance_schema\n Name: events_waits_history.row_count\nStatus: 10000\n*************************** 5. row ***************************\n Type: performance_schema\n Name: events_waits_history.memory\nStatus: 760000\n...\n*************************** 57. row ***************************\n Type: performance_schema\n Name: performance_schema.memory\nStatus: 26459600\n...\n\nThe intent of this statement is to help the DBA to understand the\neffects that different options have on memory requirements.\n\nName values consist of two parts, which name an internal buffer and an\nattribute of the buffer, respectively:\n\no Internal buffers that are exposed as a table in the\n performance_schema database are named after the table. Examples:\n events_waits_history.row_size, mutex_instances.row_count.\n\no Internal buffers that are not exposed as a table are named within\n parentheses. Examples: (pfs_cond_class).row_size,\n (pfs_mutex_class).memory.\n\no Values that apply to the Performance Schema as a whole begin with\n performance_schema. Example: performance_schema.memory.\n\nAttributes have these meanings:\n\no row_size cannot be changed. It is the size of the internal record\n used by the implementation.\n\no row_count can be changed depending on the configuration options.\n\no For a table, tbl_name.memory is the product of row_size multiplied by\n row_count. For the Performance Schema as a whole,\n performance_schema.memory is the sum of all the memory used (the sum\n of all other memory values).\n\nIn some cases, there is a direct relationship between a configuration\nparameter and a SHOW ENGINE value. For example,\nevents_waits_history_long.row_count corresponds to\nperformance_schema_events_waits_history_long_size. In other cases, the\nrelationship is more complex. For example,\nevents_waits_history.row_count corresponds to\nperformance_schema_events_waits_history_size (the number of rows per\nthread) multiplied by performance_schema_max_thread_instances ( the\nnumber of threads).\n\nIf the server has the NDBCLUSTER storage engine enabled, SHOW ENGINE\nNDB STATUS displays cluster status information such as the number of\nconnected data nodes, the cluster connectstring, and cluster binlog\nepochs, as well as counts of various Cluster API objects created by the\nMySQL Server when connected to the cluster. Sample output from this\nstatement is shown here:\n\nmysql> SHOW ENGINE NDB STATUS;\n+------------+-----------------------+--------------------------------------------------+\n| Type | Name | Status |\n+------------+-----------------------+--------------------------------------------------+\n| ndbcluster | connection | cluster_node_id=7,\n connected_host=192.168.0.103, connected_port=1186, number_of_data_nodes=4,\n number_of_ready_data_nodes=3, connect_count=0 |\n| ndbcluster | NdbTransaction | created=6, free=0, sizeof=212 |\n| ndbcluster | NdbOperation | created=8, free=8, sizeof=660 |\n| ndbcluster | NdbIndexScanOperation | created=1, free=1, sizeof=744 |\n| ndbcluster | NdbIndexOperation | created=0, free=0, sizeof=664 |\n| ndbcluster | NdbRecAttr | created=1285, free=1285, sizeof=60 |\n| ndbcluster | NdbApiSignal | created=16, free=16, sizeof=136 |\n| ndbcluster | NdbLabel | created=0, free=0, sizeof=196 |\n| ndbcluster | NdbBranch | created=0, free=0, sizeof=24 |\n| ndbcluster | NdbSubroutine | created=0, free=0, sizeof=68 |\n| ndbcluster | NdbCall | created=0, free=0, sizeof=16 |\n| ndbcluster | NdbBlob | created=1, free=1, sizeof=264 |\n| ndbcluster | NdbReceiver | created=4, free=0, sizeof=68 |\n| ndbcluster | binlog | latest_epoch=155467, latest_trans_epoch=148126,\n latest_received_binlog_epoch=0, latest_handled_binlog_epoch=0,\n latest_applied_binlog_epoch=0 |\n+------------+-----------------------+--------------------------------------------------+\n\nThe rows with connection and binlog in the Name column were added to\nthe output of this statement in MySQL 5.1. The Status column in each of\nthese rows provides information about the MySQL server\'s connection to\nthe cluster and about the cluster binary log\'s status, respectively.\nThe Status information is in the form of comma-delimited set of\nname/value pairs.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-engine.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/show-engine.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (366,14,'NAME_CONST','Syntax:\nNAME_CONST(name,value)\n\nReturns the given value. When used to produce a result set column,\nNAME_CONST() causes the column to have the given name. The arguments\nshould be constants.\n\nmysql> SELECT NAME_CONST(\'myname\', 14);\n+--------+\n| myname |\n+--------+\n| 14 |\n+--------+\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/miscellaneous-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/miscellaneous-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (367,14,'RELEASE_LOCK','Syntax:\nRELEASE_LOCK(str)\n\nReleases the lock named by the string str that was obtained with\nGET_LOCK(). Returns 1 if the lock was released, 0 if the lock was not\nestablished by this thread (in which case the lock is not released),\nand NULL if the named lock did not exist. The lock does not exist if it\nwas never obtained by a call to GET_LOCK() or if it has previously been\nreleased.\n\nThe DO statement is convenient to use with RELEASE_LOCK(). See [HELP\nDO].\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/miscellaneous-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/miscellaneous-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (368,18,'IS NULL','Syntax:\nIS NULL\n\nTests whether a value is NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html\n\n','mysql> SELECT 1 IS NULL, 0 IS NULL, NULL IS NULL;\n -> 0, 0, 1\n','http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (369,31,'CONVERT_TZ','Syntax:\nCONVERT_TZ(dt,from_tz,to_tz)\n\nCONVERT_TZ() converts a datetime value dt from the time zone given by\nfrom_tz to the time zone given by to_tz and returns the resulting\nvalue. Time zones are specified as described in\nhttp://dev.mysql.com/doc/refman/5.5/en/time-zone-support.html. This\nfunction returns NULL if the arguments are invalid.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT CONVERT_TZ(\'2004-01-01 12:00:00\',\'GMT\',\'MET\');\n -> \'2004-01-01 13:00:00\'\nmysql> SELECT CONVERT_TZ(\'2004-01-01 12:00:00\',\'+00:00\',\'+10:00\');\n -> \'2004-01-01 22:00:00\'\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (370,31,'TIME_TO_SEC','Syntax:\nTIME_TO_SEC(time)\n\nReturns the time argument, converted to seconds.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT TIME_TO_SEC(\'22:23:00\');\n -> 80580\nmysql> SELECT TIME_TO_SEC(\'00:39:38\');\n -> 2378\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (371,31,'WEEKDAY','Syntax:\nWEEKDAY(date)\n\nReturns the weekday index for date (0 = Monday, 1 = Tuesday, ... 6 =\nSunday).\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT WEEKDAY(\'2008-02-03 22:23:00\');\n -> 6\nmysql> SELECT WEEKDAY(\'2007-11-06\');\n -> 1\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (372,37,'EXPORT_SET','Syntax:\nEXPORT_SET(bits,on,off[,separator[,number_of_bits]])\n\nReturns a string such that for every bit set in the value bits, you get\nan on string and for every bit not set in the value, you get an off\nstring. Bits in bits are examined from right to left (from low-order to\nhigh-order bits). Strings are added to the result from left to right,\nseparated by the separator string (the default being the comma\ncharacter ","). The number of bits examined is given by number_of_bits,\nwhich has a default of 64 if not specified. number_of_bits is silently\nclipped to 64 if larger than 64. It is treated as an unsigned integer,\nso a value of -1 is effectively the same as 64.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','mysql> SELECT EXPORT_SET(5,\'Y\',\'N\',\',\',4);\n -> \'Y,N,Y,N\'\nmysql> SELECT EXPORT_SET(6,\'1\',\'0\',\',\',10);\n -> \'0,1,1,0,0,0,0,0,0,0\'\n','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (373,39,'ALTER SERVER','Syntax:\nALTER SERVER server_name\n OPTIONS (option [, option] ...)\n\nAlters the server information for server_name, adjusting any of the\noptions permitted in the CREATE SERVER statement. See [HELP CREATE\nSERVER]. The corresponding fields in the mysql.servers table are\nupdated accordingly. This statement requires the SUPER privilege.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/alter-server.html\n\n','ALTER SERVER s OPTIONS (USER \'sally\');\n','http://dev.mysql.com/doc/refman/5.5/en/alter-server.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (374,23,'RESIGNAL','Syntax:\nRESIGNAL [condition_value]\n [SET signal_information_item\n [, signal_information_item] ...]\n\ncondition_value:\n SQLSTATE [VALUE] sqlstate_value\n | condition_name\n\nsignal_information_item:\n condition_information_item_name = simple_value_specification\n\ncondition_information_item_name:\n CLASS_ORIGIN\n | SUBCLASS_ORIGIN\n | MESSAGE_TEXT\n | MYSQL_ERRNO\n | CONSTRAINT_CATALOG\n | CONSTRAINT_SCHEMA\n | CONSTRAINT_NAME\n | CATALOG_NAME\n | SCHEMA_NAME\n | TABLE_NAME\n | COLUMN_NAME\n | CURSOR_NAME\n\ncondition_name, simple_value_specification:\n (see following discussion)\n\nRESIGNAL passes on the error condition information that is available\nduring execution of a condition handler within a compound statement\ninside a stored procedure or function, trigger, or event. RESIGNAL may\nchange some or all information before passing it on. RESIGNAL is\nrelated to SIGNAL, but instead of originating a condition as SIGNAL\ndoes, RESIGNAL relays existing condition information, possibly after\nmodifying it.\n\nRESIGNAL makes it possible to both handle an error and return the error\ninformation. Otherwise, by executing an SQL statement within the\nhandler, information that caused the handler\'s activation is destroyed.\nRESIGNAL also can make some procedures shorter if a given handler can\nhandle part of a situation, then pass the condition "up the line" to\nanother handler.\n\nNo special privileges are required to execute the RESIGNAL statement.\n\nFor condition_value and signal_information_item, the definitions and\nrules are the same for RESIGNAL as for SIGNAL (see [HELP SIGNAL]).\n\nThe RESIGNAL statement takes condition_value and SET clauses, both of\nwhich are optional. This leads to several possible uses:\n\no RESIGNAL alone:\n\nRESIGNAL;\n\no RESIGNAL with new signal information:\n\nRESIGNAL SET signal_information_item [, signal_information_item] ...;\n\no RESIGNAL with a condition value and possibly new signal information:\n\nRESIGNAL condition_value\n [SET signal_information_item [, signal_information_item] ...];\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/resignal.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/resignal.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (375,31,'TIME FUNCTION','Syntax:\nTIME(expr)\n\nExtracts the time part of the time or datetime expression expr and\nreturns it as a string.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT TIME(\'2003-12-31 01:02:03\');\n -> \'01:02:03\'\nmysql> SELECT TIME(\'2003-12-31 01:02:03.000123\');\n -> \'01:02:03.000123\'\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (376,31,'DATE_ADD','Syntax:\nDATE_ADD(date,INTERVAL expr unit), DATE_SUB(date,INTERVAL expr unit)\n\nThese functions perform date arithmetic. The date argument specifies\nthe starting date or datetime value. expr is an expression specifying\nthe interval value to be added or subtracted from the starting date.\nexpr is a string; it may start with a "-" for negative intervals. unit\nis a keyword indicating the units in which the expression should be\ninterpreted.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT \'2008-12-31 23:59:59\' + INTERVAL 1 SECOND;\n -> \'2009-01-01 00:00:00\'\nmysql> SELECT INTERVAL 1 DAY + \'2008-12-31\';\n -> \'2009-01-01\'\nmysql> SELECT \'2005-01-01\' - INTERVAL 1 SECOND;\n -> \'2004-12-31 23:59:59\'\nmysql> SELECT DATE_ADD(\'2000-12-31 23:59:59\',\n -> INTERVAL 1 SECOND);\n -> \'2001-01-01 00:00:00\'\nmysql> SELECT DATE_ADD(\'2010-12-31 23:59:59\',\n -> INTERVAL 1 DAY);\n -> \'2011-01-01 23:59:59\'\nmysql> SELECT DATE_ADD(\'2100-12-31 23:59:59\',\n -> INTERVAL \'1:1\' MINUTE_SECOND);\n -> \'2101-01-01 00:01:00\'\nmysql> SELECT DATE_SUB(\'2005-01-01 00:00:00\',\n -> INTERVAL \'1 1:1:1\' DAY_SECOND);\n -> \'2004-12-30 22:58:59\'\nmysql> SELECT DATE_ADD(\'1900-01-01 00:00:00\',\n -> INTERVAL \'-1 10\' DAY_HOUR);\n -> \'1899-12-30 14:00:00\'\nmysql> SELECT DATE_SUB(\'1998-01-02\', INTERVAL 31 DAY);\n -> \'1997-12-02\'\nmysql> SELECT DATE_ADD(\'1992-12-31 23:59:59.000002\',\n -> INTERVAL \'1.999999\' SECOND_MICROSECOND);\n -> \'1993-01-01 00:00:01.000001\'\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (377,37,'CAST','Syntax:\nCAST(expr AS type)\n\nThe CAST() function takes an expression of any type and produces a\nresult value of a specified type, similar to CONVERT(). See the\ndescription of CONVERT() for more information.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/cast-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/cast-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (378,37,'SOUNDS LIKE','Syntax:\nexpr1 SOUNDS LIKE expr2\n\nThis is the same as SOUNDEX(expr1) = SOUNDEX(expr2).\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (379,31,'PERIOD_DIFF','Syntax:\nPERIOD_DIFF(P1,P2)\n\nReturns the number of months between periods P1 and P2. P1 and P2\nshould be in the format YYMM or YYYYMM. Note that the period arguments\nP1 and P2 are not date values.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT PERIOD_DIFF(200802,200703);\n -> 11\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (380,37,'LIKE','Syntax:\nexpr LIKE pat [ESCAPE \'escape_char\']\n\nPattern matching using SQL simple regular expression comparison.\nReturns 1 (TRUE) or 0 (FALSE). If either expr or pat is NULL, the\nresult is NULL.\n\nThe pattern need not be a literal string. For example, it can be\nspecified as a string expression or table column.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-comparison-functions.html\n\n','mysql> SELECT \'David!\' LIKE \'David_\';\n -> 1\nmysql> SELECT \'David!\' LIKE \'%D%v%\';\n -> 1\n','http://dev.mysql.com/doc/refman/5.5/en/string-comparison-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (381,24,'MULTIPOINT','MultiPoint(pt1,pt2,...)\n\nConstructs a MultiPoint value using Point or WKB Point arguments.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-mysql-specific-functions\n\n','','http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-mysql-specific-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (382,19,'>>','Syntax:\n>>\n\nShifts a longlong (BIGINT) number to the right.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/bit-functions.html\n\n','mysql> SELECT 4 >> 2;\n -> 1\n','http://dev.mysql.com/doc/refman/5.5/en/bit-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (383,23,'FETCH','Syntax:\nFETCH [[NEXT] FROM] cursor_name INTO var_name [, var_name] ...\n\nThis statement fetches the next row for the SELECT statement associated\nwith the specified cursor (which must be open), and advances the cursor\npointer. If a row exists, the fetched columns are stored in the named\nvariables. The number of columns retrieved by the SELECT statement must\nmatch the number of output variables specified in the FETCH statement.\n\nIf no more rows are available, a No Data condition occurs with SQLSTATE\nvalue \'02000\'. To detect this condition, you can set up a handler for\nit (or for a NOT FOUND condition). For an example, see\nhttp://dev.mysql.com/doc/refman/5.5/en/cursors.html.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/fetch.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/fetch.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (384,16,'AVG','Syntax:\nAVG([DISTINCT] expr)\n\nReturns the average value of expr. The DISTINCT option can be used to\nreturn the average of the distinct values of expr.\n\nAVG() returns NULL if there were no matching rows.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/group-by-functions.html\n\n','mysql> SELECT student_name, AVG(test_score)\n -> FROM student\n -> GROUP BY student_name;\n','http://dev.mysql.com/doc/refman/5.5/en/group-by-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (385,29,'TRUE FALSE','The constants TRUE and FALSE evaluate to 1 and 0, respectively. The\nconstant names can be written in any lettercase.\n\nmysql> SELECT TRUE, true, FALSE, false;\n -> 1, 1, 0, 0\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/boolean-literals.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/boolean-literals.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (386,6,'MBRWITHIN','MBRWithin(g1,g2)\n\nReturns 1 or 0 to indicate whether the Minimum Bounding Rectangle of g1\nis within the Minimum Bounding Rectangle of g2. This tests the opposite\nrelationship as MBRContains().\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/functions-for-testing-spatial-relations-between-geometric-objects.html#relations-on-geometry-mbr\n\n','mysql> SET @g1 = GeomFromText(\'Polygon((0 0,0 3,3 3,3 0,0 0))\');\nmysql> SET @g2 = GeomFromText(\'Polygon((0 0,0 5,5 5,5 0,0 0))\');\nmysql> SELECT MBRWithin(@g1,@g2), MBRWithin(@g2,@g1);\n+--------------------+--------------------+\n| MBRWithin(@g1,@g2) | MBRWithin(@g2,@g1) |\n+--------------------+--------------------+\n| 1 | 0 |\n+--------------------+--------------------+\n','http://dev.mysql.com/doc/refman/5.5/en/functions-for-testing-spatial-relations-between-geometric-objects.html#relations-on-geometry-mbr'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (387,17,'SESSION_USER','Syntax:\nSESSION_USER()\n\nSESSION_USER() is a synonym for USER().\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/information-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/information-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (388,18,'IN','Syntax:\nexpr IN (value,...)\n\nReturns 1 if expr is equal to any of the values in the IN list, else\nreturns 0. If all values are constants, they are evaluated according to\nthe type of expr and sorted. The search for the item then is done using\na binary search. This means IN is very quick if the IN value list\nconsists entirely of constants. Otherwise, type conversion takes place\naccording to the rules described in\nhttp://dev.mysql.com/doc/refman/5.5/en/type-conversion.html, but\napplied to all the arguments.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html\n\n','mysql> SELECT 2 IN (0,3,5,7);\n -> 0\nmysql> SELECT \'wefwf\' IN (\'wee\',\'wefwf\',\'weg\');\n -> 1\n','http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (389,37,'QUOTE','Syntax:\nQUOTE(str)\n\nQuotes a string to produce a result that can be used as a properly\nescaped data value in an SQL statement. The string is returned enclosed\nby single quotation marks and with each instance of backslash ("\\"),\nsingle quote ("\'"), ASCII NUL, and Control+Z preceded by a backslash.\nIf the argument is NULL, the return value is the word "NULL" without\nenclosing single quotation marks.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','mysql> SELECT QUOTE(\'Don\\\'t!\');\n -> \'Don\\\'t!\'\nmysql> SELECT QUOTE(NULL);\n -> NULL\n','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (390,26,'HELP COMMAND','Syntax:\nmysql> help search_string\n\nIf you provide an argument to the help command, mysql uses it as a\nsearch string to access server-side help from the contents of the MySQL\nReference Manual. The proper operation of this command requires that\nthe help tables in the mysql database be initialized with help topic\ninformation (see\nhttp://dev.mysql.com/doc/refman/5.5/en/server-side-help-support.html).\n\nIf there is no match for the search string, the search fails:\n\nmysql> help me\n\nNothing found\nPlease try to run \'help contents\' for a list of all accessible topics\n\nUse help contents to see a list of the help categories:\n\nmysql> help contents\nYou asked for help about help category: "Contents"\nFor more information, type \'help \', where is one of the\nfollowing categories:\n Account Management\n Administration\n Data Definition\n Data Manipulation\n Data Types\n Functions\n Functions and Modifiers for Use with GROUP BY\n Geographic Features\n Language Structure\n Plugins\n Storage Engines\n Stored Routines\n Table Maintenance\n Transactions\n Triggers\n\nIf the search string matches multiple items, mysql shows a list of\nmatching topics:\n\nmysql> help logs\nMany help items for your request exist.\nTo make a more specific request, please type \'help \',\nwhere is one of the following topics:\n SHOW\n SHOW BINARY LOGS\n SHOW ENGINE\n SHOW LOGS\n\nUse a topic as the search string to see the help entry for that topic:\n\nmysql> help show binary logs\nName: \'SHOW BINARY LOGS\'\nDescription:\nSyntax:\nSHOW BINARY LOGS\nSHOW MASTER LOGS\n\nLists the binary log files on the server. This statement is used as\npart of the procedure described in [purge-binary-logs], that shows how\nto determine which logs can be purged.\n\nmysql> SHOW BINARY LOGS;\n+---------------+-----------+\n| Log_name | File_size |\n+---------------+-----------+\n| binlog.000015 | 724935 |\n| binlog.000016 | 733481 |\n+---------------+-----------+\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/mysql-server-side-help.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/mysql-server-side-help.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (391,31,'QUARTER','Syntax:\nQUARTER(date)\n\nReturns the quarter of the year for date, in the range 1 to 4.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT QUARTER(\'2008-04-01\');\n -> 2\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (392,37,'POSITION','Syntax:\nPOSITION(substr IN str)\n\nPOSITION(substr IN str) is a synonym for LOCATE(substr,str).\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (393,26,'SHOW CREATE FUNCTION','Syntax:\nSHOW CREATE FUNCTION func_name\n\nThis statement is similar to SHOW CREATE PROCEDURE but for stored\nfunctions. See [HELP SHOW CREATE PROCEDURE].\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-create-function.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/show-create-function.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (394,14,'IS_USED_LOCK','Syntax:\nIS_USED_LOCK(str)\n\nChecks whether the lock named str is in use (that is, locked). If so,\nit returns the connection identifier of the client that holds the lock.\nOtherwise, it returns NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/miscellaneous-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/miscellaneous-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (395,3,'POLYFROMTEXT','PolyFromText(wkt[,srid]), PolygonFromText(wkt[,srid])\n\nConstructs a POLYGON value using its WKT representation and SRID.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-wkt-functions\n\n','','http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-wkt-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (396,12,'DES_ENCRYPT','Syntax:\nDES_ENCRYPT(str[,{key_num|key_str}])\n\nEncrypts the string with the given key using the Triple-DES algorithm.\n\nThis function works only if MySQL has been configured with SSL support.\nSee http://dev.mysql.com/doc/refman/5.5/en/ssl-connections.html.\n\nThe encryption key to use is chosen based on the second argument to\nDES_ENCRYPT(), if one was given. With no argument, the first key from\nthe DES key file is used. With a key_num argument, the given key number\n(0 to 9) from the DES key file is used. With a key_str argument, the\ngiven key string is used to encrypt str.\n\nThe key file can be specified with the --des-key-file server option.\n\nThe return string is a binary string where the first character is\nCHAR(128 | key_num). If an error occurs, DES_ENCRYPT() returns NULL.\n\nThe 128 is added to make it easier to recognize an encrypted key. If\nyou use a string key, key_num is 127.\n\nThe string length for the result is given by this formula:\n\nnew_len = orig_len + (8 - (orig_len % 8)) + 1\n\nEach line in the DES key file has the following format:\n\nkey_num des_key_str\n\nEach key_num value must be a number in the range from 0 to 9. Lines in\nthe file may be in any order. des_key_str is the string that is used to\nencrypt the message. There should be at least one space between the\nnumber and the key. The first key is the default key that is used if\nyou do not specify any key argument to DES_ENCRYPT().\n\nYou can tell MySQL to read new key values from the key file with the\nFLUSH DES_KEY_FILE statement. This requires the RELOAD privilege.\n\nOne benefit of having a set of default keys is that it gives\napplications a way to check for the existence of encrypted column\nvalues, without giving the end user the right to decrypt those values.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/encryption-functions.html\n\n','mysql> SELECT customer_address FROM customer_table \n > WHERE crypted_credit_card = DES_ENCRYPT(\'credit_card_number\');\n','http://dev.mysql.com/doc/refman/5.5/en/encryption-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (397,4,'CEIL','Syntax:\nCEIL(X)\n\nCEIL() is a synonym for CEILING().\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (398,37,'LENGTH','Syntax:\nLENGTH(str)\n\nReturns the length of the string str, measured in bytes. A multi-byte\ncharacter counts as multiple bytes. This means that for a string\ncontaining five 2-byte characters, LENGTH() returns 10, whereas\nCHAR_LENGTH() returns 5.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','mysql> SELECT LENGTH(\'text\');\n -> 4\n','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (399,31,'STR_TO_DATE','Syntax:\nSTR_TO_DATE(str,format)\n\nThis is the inverse of the DATE_FORMAT() function. It takes a string\nstr and a format string format. STR_TO_DATE() returns a DATETIME value\nif the format string contains both date and time parts, or a DATE or\nTIME value if the string contains only date or time parts. If the date,\ntime, or datetime value extracted from str is illegal, STR_TO_DATE()\nreturns NULL and produces a warning.\n\nThe server scans str attempting to match format to it. The format\nstring can contain literal characters and format specifiers beginning\nwith %. Literal characters in format must match literally in str.\nFormat specifiers in format must match a date or time part in str. For\nthe specifiers that can be used in format, see the DATE_FORMAT()\nfunction description.\n\nmysql> SELECT STR_TO_DATE(\'01,5,2013\',\'%d,%m,%Y\');\n -> \'2013-05-01\'\nmysql> SELECT STR_TO_DATE(\'May 1, 2013\',\'%M %d,%Y\');\n -> \'2013-05-01\'\n\nScanning starts at the beginning of str and fails if format is found\nnot to match. Extra characters at the end of str are ignored.\n\nmysql> SELECT STR_TO_DATE(\'a09:30:17\',\'a%h:%i:%s\');\n -> \'09:30:17\'\nmysql> SELECT STR_TO_DATE(\'a09:30:17\',\'%h:%i:%s\');\n -> NULL\nmysql> SELECT STR_TO_DATE(\'09:30:17a\',\'%h:%i:%s\');\n -> \'09:30:17\'\n\nUnspecified date or time parts have a value of 0, so incompletely\nspecified values in str produce a result with some or all parts set to\n0:\n\nmysql> SELECT STR_TO_DATE(\'abc\',\'abc\');\n -> \'0000-00-00\'\nmysql> SELECT STR_TO_DATE(\'9\',\'%m\');\n -> \'0000-09-00\'\nmysql> SELECT STR_TO_DATE(\'9\',\'%s\');\n -> \'00:00:09\'\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (400,11,'Y','Y(p)\n\nReturns the Y-coordinate value for the Point object p as a\ndouble-precision number.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#point-property-functions\n\n','mysql> SELECT Y(POINT(56.7, 53.34));\n+-----------------------+\n| Y(POINT(56.7, 53.34)) |\n+-----------------------+\n| 53.34 |\n+-----------------------+\n','http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#point-property-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (401,20,'CHECKSUM TABLE','Syntax:\nCHECKSUM TABLE tbl_name [, tbl_name] ... [ QUICK | EXTENDED ]\n\nCHECKSUM TABLE reports a table checksum. This statement requires the\nSELECT privilege for the table.\n\nWith QUICK, the live table checksum is reported if it is available, or\nNULL otherwise. This is very fast. A live checksum is enabled by\nspecifying the CHECKSUM=1 table option when you create the table;\ncurrently, this is supported only for MyISAM tables. See [HELP CREATE\nTABLE].\n\nWith EXTENDED, the entire table is read row by row and the checksum is\ncalculated. This can be very slow for large tables.\n\nIf neither QUICK nor EXTENDED is specified, MySQL returns a live\nchecksum if the table storage engine supports it and scans the table\notherwise.\n\nFor a nonexistent table, CHECKSUM TABLE returns NULL and generates a\nwarning.\n\nIn MySQL 5.5, CHECKSUM TABLE returns 0 for partitioned tables unless\nyou include the EXTENDED option. This issue is resolved in MySQL 5.6.\n(Bug #11933226, Bug #60681)\n\nThe checksum value depends on the table row format. If the row format\nchanges, the checksum also changes. For example, the storage format for\nVARCHAR changed between MySQL 4.1 and 5.0, so if a 4.1 table is\nupgraded to MySQL 5.0, the checksum value may change.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/checksum-table.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/checksum-table.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (402,2,'NUMINTERIORRINGS','NumInteriorRings(poly)\n\nReturns the number of interior rings in the Polygon value poly.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#polygon-property-functions\n\n','mysql> SET @poly =\n -> \'Polygon((0 0,0 3,3 3,3 0,0 0),(1 1,1 2,2 2,2 1,1 1))\';\nmysql> SELECT NumInteriorRings(GeomFromText(@poly));\n+---------------------------------------+\n| NumInteriorRings(GeomFromText(@poly)) |\n+---------------------------------------+\n| 1 |\n+---------------------------------------+\n','http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#polygon-property-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (403,2,'INTERIORRINGN','InteriorRingN(poly,N)\n\nReturns the N-th interior ring for the Polygon value poly as a\nLineString. Rings are numbered beginning with 1.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#polygon-property-functions\n\n','mysql> SET @poly =\n -> \'Polygon((0 0,0 3,3 3,3 0,0 0),(1 1,1 2,2 2,2 1,1 1))\';\nmysql> SELECT AsText(InteriorRingN(GeomFromText(@poly),1));\n+----------------------------------------------+\n| AsText(InteriorRingN(GeomFromText(@poly),1)) |\n+----------------------------------------------+\n| LINESTRING(1 1,1 2,2 2,2 1,1 1) |\n+----------------------------------------------+\n','http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#polygon-property-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (404,31,'UTC_TIME','Syntax:\nUTC_TIME, UTC_TIME()\n\nReturns the current UTC time as a value in \'HH:MM:SS\' or HHMMSS.uuuuuu\nformat, depending on whether the function is used in a string or\nnumeric context.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT UTC_TIME(), UTC_TIME() + 0;\n -> \'18:07:53\', 180753.000000\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (405,39,'DROP FUNCTION','The DROP FUNCTION statement is used to drop stored functions and\nuser-defined functions (UDFs):\n\no For information about dropping stored functions, see [HELP DROP\n PROCEDURE].\n\no For information about dropping user-defined functions, see [HELP DROP\n FUNCTION UDF].\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/drop-function.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/drop-function.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (406,39,'ALTER EVENT','Syntax:\nALTER\n [DEFINER = { user | CURRENT_USER }]\n EVENT event_name\n [ON SCHEDULE schedule]\n [ON COMPLETION [NOT] PRESERVE]\n [RENAME TO new_event_name]\n [ENABLE | DISABLE | DISABLE ON SLAVE]\n [COMMENT \'comment\']\n [DO event_body]\n\nThe ALTER EVENT statement changes one or more of the characteristics of\nan existing event without the need to drop and recreate it. The syntax\nfor each of the DEFINER, ON SCHEDULE, ON COMPLETION, COMMENT, ENABLE /\nDISABLE, and DO clauses is exactly the same as when used with CREATE\nEVENT. (See [HELP CREATE EVENT].)\n\nAny user can alter an event defined on a database for which that user\nhas the EVENT privilege. When a user executes a successful ALTER EVENT\nstatement, that user becomes the definer for the affected event.\n\nALTER EVENT works only with an existing event:\n\nmysql> ALTER EVENT no_such_event \n > ON SCHEDULE \n > EVERY \'2:3\' DAY_HOUR;\nERROR 1517 (HY000): Unknown event \'no_such_event\'\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/alter-event.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/alter-event.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (407,16,'STDDEV','Syntax:\nSTDDEV(expr)\n\nReturns the population standard deviation of expr. This function is\nprovided for compatibility with Oracle. The standard SQL function\nSTDDEV_POP() can be used instead.\n\nThis function returns NULL if there were no matching rows.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/group-by-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/group-by-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (408,31,'DATE_SUB','Syntax:\nDATE_SUB(date,INTERVAL expr unit)\n\nSee the description for DATE_ADD().\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (409,31,'PERIOD_ADD','Syntax:\nPERIOD_ADD(P,N)\n\nAdds N months to period P (in the format YYMM or YYYYMM). Returns a\nvalue in the format YYYYMM. Note that the period argument P is not a\ndate value.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT PERIOD_ADD(200801,2);\n -> 200803\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (410,19,'|','Syntax:\n|\n\nBitwise OR:\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/bit-functions.html\n\n','mysql> SELECT 29 | 15;\n -> 31\n','http://dev.mysql.com/doc/refman/5.5/en/bit-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (411,3,'GEOMFROMTEXT','GeomFromText(wkt[,srid]), GeometryFromText(wkt[,srid])\n\nConstructs a geometry value of any type using its WKT representation\nand SRID.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-wkt-functions\n\n','','http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-wkt-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (412,14,'UUID_SHORT','Syntax:\nUUID_SHORT()\n\nReturns a "short" universal identifier as a 64-bit unsigned integer\n(rather than a string-form 128-bit identifier as returned by the UUID()\nfunction).\n\nThe value of UUID_SHORT() is guaranteed to be unique if the following\nconditions hold:\n\no The server_id of the current host is unique among your set of master\n and slave servers\n\no server_id is between 0 and 255\n\no You do not set back your system time for your server between mysqld\n restarts\n\no You do not invoke UUID_SHORT() on average more than 16 million times\n per second between mysqld restarts\n\nThe UUID_SHORT() return value is constructed this way:\n\n (server_id & 255) << 56\n+ (server_startup_time_in_seconds << 24)\n+ incremented_variable++;\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/miscellaneous-functions.html\n\n','mysql> SELECT UUID_SHORT();\n -> 92395783831158784\n','http://dev.mysql.com/doc/refman/5.5/en/miscellaneous-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (413,37,'RIGHT','Syntax:\nRIGHT(str,len)\n\nReturns the rightmost len characters from the string str, or NULL if\nany argument is NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','mysql> SELECT RIGHT(\'foobarbar\', 4);\n -> \'rbar\'\n','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (414,31,'DATEDIFF','Syntax:\nDATEDIFF(expr1,expr2)\n\nDATEDIFF() returns expr1 - expr2 expressed as a value in days from one\ndate to the other. expr1 and expr2 are date or date-and-time\nexpressions. Only the date parts of the values are used in the\ncalculation.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT DATEDIFF(\'2007-12-31 23:59:59\',\'2007-12-30\');\n -> 1\nmysql> SELECT DATEDIFF(\'2010-11-30 23:59:59\',\'2010-12-31\');\n -> -31\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (415,39,'DROP TABLESPACE','Syntax:\nDROP TABLESPACE tablespace_name\n ENGINE [=] engine_name\n\nThis statement drops a tablespace that was previously created using\nCREATE TABLESPACE (see [HELP CREATE TABLESPACE]).\n\n*Important*: The tablespace to be dropped must not contain any data\nfiles; in other words, before you can drop a tablespace, you must first\ndrop each of its data files using ALTER TABLESPACE ... DROP DATAFILE\n(see [HELP ALTER TABLESPACE]).\n\nThe ENGINE clause (required) specifies the storage engine used by the\ntablespace. Currently, the only accepted values for engine_name are NDB\nand NDBCLUSTER.\n\nDROP TABLESPACE is useful only with Disk Data storage for MySQL\nCluster. See\nhttp://dev.mysql.com/doc/refman/5.5/en/mysql-cluster-disk-data.html.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/drop-tablespace.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/drop-tablespace.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (416,39,'DROP PROCEDURE','Syntax:\nDROP {PROCEDURE | FUNCTION} [IF EXISTS] sp_name\n\nThis statement is used to drop a stored procedure or function. That is,\nthe specified routine is removed from the server. You must have the\nALTER ROUTINE privilege for the routine. (If the\nautomatic_sp_privileges system variable is enabled, that privilege and\nEXECUTE are granted automatically to the routine creator when the\nroutine is created and dropped from the creator when the routine is\ndropped. See\nhttp://dev.mysql.com/doc/refman/5.5/en/stored-routines-privileges.html.\n)\n\nThe IF EXISTS clause is a MySQL extension. It prevents an error from\noccurring if the procedure or function does not exist. A warning is\nproduced that can be viewed with SHOW WARNINGS.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/drop-procedure.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/drop-procedure.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (417,20,'CHECK TABLE','Syntax:\nCHECK TABLE tbl_name [, tbl_name] ... [option] ...\n\noption = {FOR UPGRADE | QUICK | FAST | MEDIUM | EXTENDED | CHANGED}\n\nCHECK TABLE checks a table or tables for errors. CHECK TABLE works for\nInnoDB, MyISAM, ARCHIVE, and CSV tables. For MyISAM tables, the key\nstatistics are updated as well.\n\nTo check a table, you must have some privilege for it.\n\nCHECK TABLE can also check views for problems, such as tables that are\nreferenced in the view definition that no longer exist.\n\nCHECK TABLE is supported for partitioned tables, and you can use ALTER\nTABLE ... CHECK PARTITION to check one or more partitions; for more\ninformation, see [HELP ALTER TABLE], and\nhttp://dev.mysql.com/doc/refman/5.5/en/partitioning-maintenance.html.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/check-table.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/check-table.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (418,37,'BIN','Syntax:\nBIN(N)\n\nReturns a string representation of the binary value of N, where N is a\nlonglong (BIGINT) number. This is equivalent to CONV(N,10,2). Returns\nNULL if N is NULL.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','mysql> SELECT BIN(12);\n -> \'1100\'\n','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (419,5,'INSTALL PLUGIN','Syntax:\nINSTALL PLUGIN plugin_name SONAME \'shared_library_name\'\n\nThis statement installs a server plugin. It requires the INSERT\nprivilege for the mysql.plugin table.\n\nplugin_name is the name of the plugin as defined in the plugin\ndescriptor structure contained in the library file (see\nhttp://dev.mysql.com/doc/refman/5.5/en/plugin-data-structures.html).\nPlugin names are not case sensitive. For maximal compatibility, plugin\nnames should be limited to ASCII letters, digits, and underscore\nbecause they are used in C source files, shell command lines, M4 and\nBourne shell scripts, and SQL environments.\n\nshared_library_name is the name of the shared library that contains the\nplugin code. The name includes the file name extension (for example,\nlibmyplugin.so, libmyplugin.dll, or libmyplugin.dylib).\n\nThe shared library must be located in the plugin directory (the\ndirectory named by the plugin_dir system variable). The library must be\nin the plugin directory itself, not in a subdirectory. By default,\nplugin_dir is the plugin directory under the directory named by the\npkglibdir configuration variable, but it can be changed by setting the\nvalue of plugin_dir at server startup. For example, set its value in a\nmy.cnf file:\n\n[mysqld]\nplugin_dir=/path/to/plugin/directory\n\nIf the value of plugin_dir is a relative path name, it is taken to be\nrelative to the MySQL base directory (the value of the basedir system\nvariable).\n\nINSTALL PLUGIN loads and initializes the plugin code to make the plugin\navailable for use. A plugin is initialized by executing its\ninitialization function, which handles any setup that the plugin must\nperform before it can be used. When the server shuts down, it executes\nthe deinitialization function for each plugin that is loaded so that\nthe plugin has a change to perform any final cleanup.\n\nINSTALL PLUGIN also registers the plugin by adding a line that\nindicates the plugin name and library file name to the mysql.plugin\ntable. At server startup, the server loads and initializes any plugin\nthat is listed in the mysql.plugin table. This means that a plugin is\ninstalled with INSTALL PLUGIN only once, not every time the server\nstarts. Plugin loading at startup does not occur if the server is\nstarted with the --skip-grant-tables option.\n\nA plugin library can contain multiple plugins. For each of them to be\ninstalled, use a separate INSTALL PLUGIN statement. Each statement\nnames a different plugin, but all of them specify the same library\nname.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/install-plugin.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/install-plugin.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (420,23,'DECLARE CURSOR','Syntax:\nDECLARE cursor_name CURSOR FOR select_statement\n\nThis statement declares a cursor and associates it with a SELECT\nstatement that retrieves the rows to be traversed by the cursor. To\nfetch the rows later, use a FETCH statement. The number of columns\nretrieved by the SELECT statement must match the number of output\nvariables specified in the FETCH statement.\n\nThe SELECT statement cannot have an INTO clause.\n\nCursor declarations must appear before handler declarations and after\nvariable and condition declarations.\n\nA stored program may contain multiple cursor declarations, but each\ncursor declared in a given block must have a unique name. For an\nexample, see http://dev.mysql.com/doc/refman/5.5/en/cursors.html.\n\nFor information available through SHOW statements, it is possible in\nmany cases to obtain equivalent information by using a cursor with an\nINFORMATION_SCHEMA table.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/declare-cursor.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/declare-cursor.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (421,27,'LOAD DATA','Syntax:\nLOAD DATA [LOW_PRIORITY | CONCURRENT] [LOCAL] INFILE \'file_name\'\n [REPLACE | IGNORE]\n INTO TABLE tbl_name\n [CHARACTER SET charset_name]\n [{FIELDS | COLUMNS}\n [TERMINATED BY \'string\']\n [[OPTIONALLY] ENCLOSED BY \'char\']\n [ESCAPED BY \'char\']\n ]\n [LINES\n [STARTING BY \'string\']\n [TERMINATED BY \'string\']\n ]\n [IGNORE number {LINES | ROWS}]\n [(col_name_or_user_var,...)]\n [SET col_name = expr,...]\n\nThe LOAD DATA INFILE statement reads rows from a text file into a table\nat a very high speed. The file name must be given as a literal string.\n\nLOAD DATA INFILE is the complement of SELECT ... INTO OUTFILE. (See\nhttp://dev.mysql.com/doc/refman/5.5/en/select-into.html.) To write data\nfrom a table to a file, use SELECT ... INTO OUTFILE. To read the file\nback into a table, use LOAD DATA INFILE. The syntax of the FIELDS and\nLINES clauses is the same for both statements. Both clauses are\noptional, but FIELDS must precede LINES if both are specified.\n\nFor more information about the efficiency of INSERT versus LOAD DATA\nINFILE and speeding up LOAD DATA INFILE, see\nhttp://dev.mysql.com/doc/refman/5.5/en/insert-speed.html.\n\nThe character set indicated by the character_set_database system\nvariable is used to interpret the information in the file. SET NAMES\nand the setting of character_set_client do not affect interpretation of\ninput. If the contents of the input file use a character set that\ndiffers from the default, it is usually preferable to specify the\ncharacter set of the file by using the CHARACTER SET clause. A\ncharacter set of binary specifies "no conversion."\n\nLOAD DATA INFILE interprets all fields in the file as having the same\ncharacter set, regardless of the data types of the columns into which\nfield values are loaded. For proper interpretation of file contents,\nyou must ensure that it was written with the correct character set. For\nexample, if you write a data file with mysqldump -T or by issuing a\nSELECT ... INTO OUTFILE statement in mysql, be sure to use a\n--default-character-set option with mysqldump or mysql so that output\nis written in the character set to be used when the file is loaded with\nLOAD DATA INFILE.\n\n*Note*: It is not possible to load data files that use the ucs2, utf16,\nor utf32 character set.\n\nThe character_set_filesystem system variable controls the\ninterpretation of the file name.\n\nYou can also load data files by using the mysqlimport utility; it\noperates by sending a LOAD DATA INFILE statement to the server. The\n--local option causes mysqlimport to read data files from the client\nhost. You can specify the --compress option to get better performance\nover slow networks if the client and server support the compressed\nprotocol. See http://dev.mysql.com/doc/refman/5.5/en/mysqlimport.html.\n\nIf you use LOW_PRIORITY, execution of the LOAD DATA statement is\ndelayed until no other clients are reading from the table. This affects\nonly storage engines that use only table-level locking (such as MyISAM,\nMEMORY, and MERGE).\n\nIf you specify CONCURRENT with a MyISAM table that satisfies the\ncondition for concurrent inserts (that is, it contains no free blocks\nin the middle), other threads can retrieve data from the table while\nLOAD DATA is executing. Using this option affects the performance of\nLOAD DATA a bit, even if no other thread is using the table at the same\ntime.\n\nPrior to MySQL 5.5.1, CONCURRENT was not replicated when using\nstatement-based replication (see Bug #34628). However, it is replicated\nwhen using row-based replication, regardless of the version. See\nhttp://dev.mysql.com/doc/refman/5.5/en/replication-features-load-data.h\ntml, for more information.\n\nThe LOCAL keyword, if specified, is interpreted with respect to the\nclient end of the connection:\n\no If LOCAL is specified, the file is read by the client program on the\n client host and sent to the server. The file can be given as a full\n path name to specify its exact location. If given as a relative path\n name, the name is interpreted relative to the directory in which the\n client program was started.\n\n When using LOCAL with LOAD DATA, a copy of the file is created in the\n server\'s temporary directory. This is not the directory determined by\n the value of tmpdir or slave_load_tmpdir, but rather the operating\n system\'s temporary directory, and is not configurable in the MySQL\n Server. (Typically the system temporary directory is /tmp on Linux\n systems and C:\\WINDOWS\\TEMP on Windows.) Lack of sufficient space for\n the copy in this directory can cause the LOAD DATA LOCAL statement to\n fail.\n\no If LOCAL is not specified, the file must be located on the server\n host and is read directly by the server. The server uses the\n following rules to locate the file:\n\n o If the file name is an absolute path name, the server uses it as\n given.\n\n o If the file name is a relative path name with one or more leading\n components, the server searches for the file relative to the\n server\'s data directory.\n\n o If a file name with no leading components is given, the server\n looks for the file in the database directory of the default\n database.\n\nNote that, in the non-LOCAL case, these rules mean that a file named as\n./myfile.txt is read from the server\'s data directory, whereas the file\nnamed as myfile.txt is read from the database directory of the default\ndatabase. For example, if db1 is the default database, the following\nLOAD DATA statement reads the file data.txt from the database directory\nfor db1, even though the statement explicitly loads the file into a\ntable in the db2 database:\n\nLOAD DATA INFILE \'data.txt\' INTO TABLE db2.my_table;\n\nWindows path names are specified using forward slashes rather than\nbackslashes. If you do use backslashes, you must double them.\n\nFor security reasons, when reading text files located on the server,\nthe files must either reside in the database directory or be readable\nby all. Also, to use LOAD DATA INFILE on server files, you must have\nthe FILE privilege. See\nhttp://dev.mysql.com/doc/refman/5.5/en/privileges-provided.html. For\nnon-LOCAL load operations, if the secure_file_priv system variable is\nset to a nonempty directory name, the file to be loaded must be located\nin that directory.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/load-data.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/load-data.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (422,24,'MULTILINESTRING','MultiLineString(ls1,ls2,...)\n\nConstructs a MultiLineString value using LineString or WKB LineString\narguments.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-mysql-specific-functions\n\n','','http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-mysql-specific-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (423,31,'LOCALTIME','Syntax:\nLOCALTIME, LOCALTIME()\n\nLOCALTIME and LOCALTIME() are synonyms for NOW().\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (424,26,'SHOW RELAYLOG EVENTS','Syntax:\nSHOW RELAYLOG EVENTS\n [IN \'log_name\'] [FROM pos] [LIMIT [offset,] row_count]\n\nShows the events in the relay log of a replication slave. If you do not\nspecify \'log_name\', the first relay log is displayed. This statement\nhas no effect on the master.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-relaylog-events.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/show-relaylog-events.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (425,3,'MPOINTFROMTEXT','MPointFromText(wkt[,srid]), MultiPointFromText(wkt[,srid])\n\nConstructs a MULTIPOINT value using its WKT representation and SRID.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-wkt-functions\n\n','','http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-wkt-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (426,22,'BLOB','BLOB[(M)]\n\nA BLOB column with a maximum length of 65,535 (216 - 1) bytes. Each\nBLOB value is stored using a 2-byte length prefix that indicates the\nnumber of bytes in the value.\n\nAn optional length M can be given for this type. If this is done, MySQL\ncreates the column as the smallest BLOB type large enough to hold\nvalues M bytes long.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/string-type-overview.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (427,12,'SHA1','Syntax:\nSHA1(str), SHA(str)\n\nCalculates an SHA-1 160-bit checksum for the string, as described in\nRFC 3174 (Secure Hash Algorithm). The value is returned as a string of\n40 hex digits, or NULL if the argument was NULL. One of the possible\nuses for this function is as a hash key. See the notes at the beginning\nof this section about storing hash values efficiently. You can also use\nSHA1() as a cryptographic function for storing passwords. SHA() is\nsynonymous with SHA1().\n\nAs of MySQL 5.5.3, the return value is a nonbinary string in the\nconnection character set. Before 5.5.3, the return value is a binary\nstring; see the notes at the beginning of this section about using the\nvalue as a nonbinary string.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/encryption-functions.html\n\n','mysql> SELECT SHA1(\'abc\');\n -> \'a9993e364706816aba3e25717850c26c9cd0d89d\'\n','http://dev.mysql.com/doc/refman/5.5/en/encryption-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (428,37,'SUBSTR','Syntax:\nSUBSTR(str,pos), SUBSTR(str FROM pos), SUBSTR(str,pos,len), SUBSTR(str\nFROM pos FOR len)\n\nSUBSTR() is a synonym for SUBSTRING().\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (429,12,'PASSWORD','Syntax:\nPASSWORD(str)\n\nCalculates and returns a hashed password string from the plaintext\npassword str and returns a nonbinary string in the connection character\nset (a binary string before MySQL 5.5.3), or NULL if the argument is\nNULL. This function is the SQL interface to the algorithm used by the\nserver to encrypt MySQL passwords for storage in the mysql.user grant\ntable.\n\nThe password hashing method used by PASSWORD() depends on the value of\nthe old_passwords system variable:\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/encryption-functions.html\n\n','mysql> SET old_passwords = 0;\nmysql> SELECT PASSWORD(\'mypass\');\n+-------------------------------------------+\n| PASSWORD(\'mypass\') |\n+-------------------------------------------+\n| *6C8989366EAF75BB670AD8EA7A7FC1176A95CEF4 |\n+-------------------------------------------+\n\nmysql> SET old_passwords = 1;\nmysql> SELECT PASSWORD(\'mypass\');\n+--------------------+\n| PASSWORD(\'mypass\') |\n+--------------------+\n| 6f8c114b58f2ce9e |\n+--------------------+\n','http://dev.mysql.com/doc/refman/5.5/en/encryption-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (430,22,'CHAR','[NATIONAL] CHAR[(M)] [CHARACTER SET charset_name] [COLLATE\ncollation_name]\n\nA fixed-length string that is always right-padded with spaces to the\nspecified length when stored. M represents the column length in\ncharacters. The range of M is 0 to 255. If M is omitted, the length is\n1.\n\n*Note*: Trailing spaces are removed when CHAR values are retrieved\nunless the PAD_CHAR_TO_FULL_LENGTH SQL mode is enabled.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/string-type-overview.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (431,31,'UTC_DATE','Syntax:\nUTC_DATE, UTC_DATE()\n\nReturns the current UTC date as a value in \'YYYY-MM-DD\' or YYYYMMDD\nformat, depending on whether the function is used in a string or\nnumeric context.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT UTC_DATE(), UTC_DATE() + 0;\n -> \'2003-08-14\', 20030814\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (432,36,'DIMENSION','Dimension(g)\n\nReturns the inherent dimension of the geometry value g. The result can\nbe -1, 0, 1, or 2. The meaning of these values is given in\nhttp://dev.mysql.com/doc/refman/5.5/en/gis-class-geometry.html.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#general-geometry-property-functions\n\n','mysql> SELECT Dimension(GeomFromText(\'LineString(1 1,2 2)\'));\n+------------------------------------------------+\n| Dimension(GeomFromText(\'LineString(1 1,2 2)\')) |\n+------------------------------------------------+\n| 1 |\n+------------------------------------------------+\n','http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#general-geometry-property-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (433,16,'COUNT DISTINCT','Syntax:\nCOUNT(DISTINCT expr,[expr...])\n\nReturns a count of the number of rows with different non-NULL expr\nvalues.\n\nCOUNT(DISTINCT) returns 0 if there were no matching rows.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/group-by-functions.html\n\n','mysql> SELECT COUNT(DISTINCT results) FROM student;\n','http://dev.mysql.com/doc/refman/5.5/en/group-by-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (434,22,'BIT','BIT[(M)]\n\nA bit-field type. M indicates the number of bits per value, from 1 to\n64. The default is 1 if M is omitted.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/numeric-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/numeric-type-overview.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (435,30,'EQUALS','Equals(g1,g2)\n\nReturns 1 or 0 to indicate whether g1 is spatially equal to g2.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/functions-for-testing-spatial-relations-between-geometric-objects.html#functions-that-test-spatial-relationships-between-geometries\n\n','','http://dev.mysql.com/doc/refman/5.5/en/functions-for-testing-spatial-relations-between-geometric-objects.html#functions-that-test-spatial-relationships-between-geometries'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (436,26,'SHOW CREATE VIEW','Syntax:\nSHOW CREATE VIEW view_name\n\nThis statement shows a CREATE VIEW statement that creates the given\nview.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-create-view.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/show-create-view.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (437,18,'INTERVAL','Syntax:\nINTERVAL(N,N1,N2,N3,...)\n\nReturns 0 if N < N1, 1 if N < N2 and so on or -1 if N is NULL. All\narguments are treated as integers. It is required that N1 < N2 < N3 <\n... < Nn for this function to work correctly. This is because a binary\nsearch is used (very fast).\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html\n\n','mysql> SELECT INTERVAL(23, 1, 15, 17, 30, 44, 200);\n -> 3\nmysql> SELECT INTERVAL(10, 1, 10, 100, 1000);\n -> 2\nmysql> SELECT INTERVAL(22, 23, 30, 44, 200);\n -> 0\n','http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (438,31,'FROM_DAYS','Syntax:\nFROM_DAYS(N)\n\nGiven a day number N, returns a DATE value.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT FROM_DAYS(730669);\n -> \'2007-07-03\'\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (439,39,'ALTER PROCEDURE','Syntax:\nALTER PROCEDURE proc_name [characteristic ...]\n\ncharacteristic:\n COMMENT \'string\'\n | LANGUAGE SQL\n | { CONTAINS SQL | NO SQL | READS SQL DATA | MODIFIES SQL DATA }\n | SQL SECURITY { DEFINER | INVOKER }\n\nThis statement can be used to change the characteristics of a stored\nprocedure. More than one change may be specified in an ALTER PROCEDURE\nstatement. However, you cannot change the parameters or body of a\nstored procedure using this statement; to make such changes, you must\ndrop and re-create the procedure using DROP PROCEDURE and CREATE\nPROCEDURE.\n\nYou must have the ALTER ROUTINE privilege for the procedure. By\ndefault, that privilege is granted automatically to the procedure\ncreator. This behavior can be changed by disabling the\nautomatic_sp_privileges system variable. See\nhttp://dev.mysql.com/doc/refman/5.5/en/stored-routines-privileges.html.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/alter-procedure.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/alter-procedure.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (440,19,'BIT_COUNT','Syntax:\nBIT_COUNT(N)\n\nReturns the number of bits that are set in the argument N.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/bit-functions.html\n\n','mysql> SELECT BIT_COUNT(29), BIT_COUNT(b\'101010\');\n -> 4, 3\n','http://dev.mysql.com/doc/refman/5.5/en/bit-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (441,37,'OCTET_LENGTH','Syntax:\nOCTET_LENGTH(str)\n\nOCTET_LENGTH() is a synonym for LENGTH().\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (442,31,'UTC_TIMESTAMP','Syntax:\nUTC_TIMESTAMP, UTC_TIMESTAMP()\n\nReturns the current UTC date and time as a value in \'YYYY-MM-DD\nHH:MM:SS\' or YYYYMMDDHHMMSS.uuuuuu format, depending on whether the\nfunction is used in a string or numeric context.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT UTC_TIMESTAMP(), UTC_TIMESTAMP() + 0;\n -> \'2003-08-14 18:08:04\', 20030814180804.000000\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (443,12,'AES_ENCRYPT','Syntax:\nAES_ENCRYPT(str,key_str)\n\nAES_ENCRYPT() and AES_DECRYPT() enable encryption and decryption of\ndata using the official AES (Advanced Encryption Standard) algorithm,\npreviously known as "Rijndael." Encoding with a 128-bit key length is\nused, but you can extend it up to 256 bits by modifying the source. We\nchose 128 bits because it is much faster and it is secure enough for\nmost purposes.\n\nAES_ENCRYPT() encrypts a string and returns a binary string.\nAES_DECRYPT() decrypts the encrypted string and returns the original\nstring. The input arguments may be any length. If either argument is\nNULL, the result of this function is also NULL.\n\nBecause AES is a block-level algorithm, padding is used to encode\nuneven length strings and so the result string length may be calculated\nusing this formula:\n\n16 * (trunc(string_length / 16) + 1)\n\nIf AES_DECRYPT() detects invalid data or incorrect padding, it returns\nNULL. However, it is possible for AES_DECRYPT() to return a non-NULL\nvalue (possibly garbage) if the input data or the key is invalid.\n\nYou can use the AES functions to store data in an encrypted form by\nmodifying your queries:\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/encryption-functions.html\n\n','INSERT INTO t VALUES (1,AES_ENCRYPT(\'text\',\'password\'));\n','http://dev.mysql.com/doc/refman/5.5/en/encryption-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (444,4,'+','Syntax:\n+\n\nAddition:\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/arithmetic-functions.html\n\n','mysql> SELECT 3+5;\n -> 8\n','http://dev.mysql.com/doc/refman/5.5/en/arithmetic-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (445,14,'INET_NTOA','Syntax:\nINET_NTOA(expr)\n\nGiven a numeric IPv4 network address in network byte order, returns the\ndotted-quad representation of the address as a string. INET_NTOA()\nreturns NULL if it does not understand its argument.\n\nAs of MySQL 5.5.3, the return value is a nonbinary string in the\nconnection character set. Before 5.5.3, the return value is a binary\nstring.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/miscellaneous-functions.html\n\n','mysql> SELECT INET_NTOA(167773449);\n -> \'10.0.5.9\'\n','http://dev.mysql.com/doc/refman/5.5/en/miscellaneous-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (446,4,'ACOS','Syntax:\nACOS(X)\n\nReturns the arc cosine of X, that is, the value whose cosine is X.\nReturns NULL if X is not in the range -1 to 1.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html\n\n','mysql> SELECT ACOS(1);\n -> 0\nmysql> SELECT ACOS(1.0001);\n -> NULL\nmysql> SELECT ACOS(0);\n -> 1.5707963267949\n','http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (447,8,'ISOLATION','Syntax:\nSET [GLOBAL | SESSION] TRANSACTION ISOLATION LEVEL\n {\n REPEATABLE READ\n | READ COMMITTED\n | READ UNCOMMITTED\n | SERIALIZABLE\n }\n\nThis statement sets the transaction isolation level, used for\noperations on InnoDB tables.\n\nScope of the Isolation Level\n\nYou can set the isolation level globally, for the current session, or\nfor the next transaction:\n\no With the GLOBAL keyword, the statement sets the default transaction\n level globally for all subsequent sessions. Existing sessions are\n unaffected.\n\no With the SESSION keyword, the statement sets the default transaction\n level for all subsequent transactions performed within the current\n session.\n\no Without any SESSION or GLOBAL keyword, the statement sets the\n isolation level for the next (not started) transaction performed\n within the current session.\n\nA change to the global default isolation level requires the SUPER\nprivilege. Any session is free to change its session isolation level\n(even in the middle of a transaction), or the isolation level for its\nnext transaction.\n\nSET TRANSACTION ISOLATION LEVEL without GLOBAL or SESSION is not\npermitted while there is an active transaction:\n\nmysql> START TRANSACTION;\nQuery OK, 0 rows affected (0.02 sec)\n\nmysql> SET TRANSACTION ISOLATION LEVEL SERIALIZABLE;\nERROR 1568 (25001): Transaction isolation level can\'t be changed\nwhile a transaction is in progress\n\nTo set the global default isolation level at server startup, use the\n--transaction-isolation=level option to mysqld on the command line or\nin an option file. Values of level for this option use dashes rather\nthan spaces, so the permissible values are READ-UNCOMMITTED,\nREAD-COMMITTED, REPEATABLE-READ, or SERIALIZABLE. For example, to set\nthe default isolation level to REPEATABLE READ, use these lines in the\n[mysqld] section of an option file:\n\n[mysqld]\ntransaction-isolation = REPEATABLE-READ\n\nIt is possible to check or set the global and session transaction\nisolation levels at runtime by using the tx_isolation system variable:\n\nSELECT @@GLOBAL.tx_isolation, @@tx_isolation;\nSET GLOBAL tx_isolation=\'REPEATABLE-READ\';\nSET SESSION tx_isolation=\'SERIALIZABLE\';\n\nDetails and Usage of Isolation Levels\n\nInnoDB supports each of the transaction isolation levels described here\nusing different locking strategies. You can enforce a high degree of\nconsistency with the default REPEATABLE READ level, for operations on\ncrucial data where ACID compliance is important. Or you can relax the\nconsistency rules with READ COMMITTED or even READ UNCOMMITTED, in\nsituations such as bulk reporting where precise consistency and\nrepeatable results are less important than minimizing the amount of\noverhead for locking. SERIALIZABLE enforces even stricter rules than\nREPEATABLE READ, and is used mainly in specialized situations, such as\nwith XA transactions and for troubleshooting issues with concurrency\nand deadlocks.\n\nFor full information about how these isolation levels work with InnoDB\ntransactions, see\nhttp://dev.mysql.com/doc/refman/5.5/en/innodb-transaction-model.html.\nIn particular, for additional information about InnoDB record-level\nlocks and how it uses them to execute various types of statements, see\nhttp://dev.mysql.com/doc/refman/5.5/en/innodb-record-level-locks.html\nand http://dev.mysql.com/doc/refman/5.5/en/innodb-locks-set.html.\n\nThe following list describes how MySQL supports the different\ntransaction levels. The list goes from the most commonly used level to\nthe least used.\n\no REPEATABLE READ\n\n This is the default isolation level for InnoDB. For consistent reads,\n there is an important difference from the READ COMMITTED isolation\n level: All consistent reads within the same transaction read the\n snapshot established by the first read. This convention means that if\n you issue several plain (nonlocking) SELECT statements within the\n same transaction, these SELECT statements are consistent also with\n respect to each other. See\n http://dev.mysql.com/doc/refman/5.5/en/innodb-consistent-read.html.\n\n For locking reads (SELECT with FOR UPDATE or LOCK IN SHARE MODE),\n UPDATE, and DELETE statements, locking depends on whether the\n statement uses a unique index with a unique search condition, or a\n range-type search condition. For a unique index with a unique search\n condition, InnoDB locks only the index record found, not the gap\n before it. For other search conditions, InnoDB locks the index range\n scanned, using gap locks or next-key (gap plus index-record) locks to\n block insertions by other sessions into the gaps covered by the\n range.\n\no READ COMMITTED\n\n A somewhat Oracle-like isolation level with respect to consistent\n (nonlocking) reads: Each consistent read, even within the same\n transaction, sets and reads its own fresh snapshot. See\n http://dev.mysql.com/doc/refman/5.5/en/innodb-consistent-read.html.\n\n For locking reads (SELECT with FOR UPDATE or LOCK IN SHARE MODE),\n InnoDB locks only index records, not the gaps before them, and thus\n permits the free insertion of new records next to locked records. For\n UPDATE and DELETE statements, locking depends on whether the\n statement uses a unique index with a unique search condition (such as\n WHERE id = 100), or a range-type search condition (such as WHERE id >\n 100). For a unique index with a unique search condition, InnoDB locks\n only the index record found, not the gap before it. For range-type\n searches, InnoDB locks the index range scanned, using gap locks or\n next-key (gap plus index-record) locks to block insertions by other\n sessions into the gaps covered by the range. This is necessary\n because "phantom rows" must be blocked for MySQL replication and\n recovery to work.\n\n *Note*: In MySQL 5.5, if the READ COMMITTED isolation level is used\n or the innodb_locks_unsafe_for_binlog system variable is enabled,\n there is no InnoDB gap locking except for foreign-key constraint\n checking and duplicate-key checking. Also, record locks for\n nonmatching rows are released after MySQL has evaluated the WHERE\n condition. If you use READ COMMITTED or enable\n innodb_locks_unsafe_for_binlog, you must use row-based binary\n logging.\n\no READ UNCOMMITTED\n\n SELECT statements are performed in a nonlocking fashion, but a\n possible earlier version of a row might be used. Thus, using this\n isolation level, such reads are not consistent. This is also called a\n "dirty read." Otherwise, this isolation level works like READ\n COMMITTED.\n\no SERIALIZABLE\n\n This level is like REPEATABLE READ, but InnoDB implicitly converts\n all plain SELECT statements to SELECT ... LOCK IN SHARE MODE if\n autocommit is disabled. If autocommit is enabled, the SELECT is its\n own transaction. It therefore is known to be read only and can be\n serialized if performed as a consistent (nonlocking) read and need\n not block for other transactions. (To force a plain SELECT to block\n if other transactions have modified the selected rows, disable\n autocommit.)\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/set-transaction.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/set-transaction.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (448,4,'CEILING','Syntax:\nCEILING(X)\n\nReturns the smallest integer value not less than X.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html\n\n','mysql> SELECT CEILING(1.23);\n -> 2\nmysql> SELECT CEILING(-1.23);\n -> -1\n','http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (449,4,'SIN','Syntax:\nSIN(X)\n\nReturns the sine of X, where X is given in radians.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html\n\n','mysql> SELECT SIN(PI());\n -> 1.2246063538224e-16\nmysql> SELECT ROUND(SIN(PI()));\n -> 0\n','http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (450,31,'DAYOFWEEK','Syntax:\nDAYOFWEEK(date)\n\nReturns the weekday index for date (1 = Sunday, 2 = Monday, ..., 7 =\nSaturday). These index values correspond to the ODBC standard.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT DAYOFWEEK(\'2007-02-03\');\n -> 7\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (451,26,'SHOW PROCESSLIST','Syntax:\nSHOW [FULL] PROCESSLIST\n\nSHOW PROCESSLIST shows you which threads are running. You can also get\nthis information from the INFORMATION_SCHEMA PROCESSLIST table or the\nmysqladmin processlist command. If you have the PROCESS privilege, you\ncan see all threads. Otherwise, you can see only your own threads (that\nis, threads associated with the MySQL account that you are using). If\nyou do not use the FULL keyword, only the first 100 characters of each\nstatement are shown in the Info field.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-processlist.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/show-processlist.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (452,32,'LINEFROMWKB','LineFromWKB(wkb[,srid]), LineStringFromWKB(wkb[,srid])\n\nConstructs a LINESTRING value using its WKB representation and SRID.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-wkb-functions\n\n','','http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-wkb-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (453,36,'GEOMETRYTYPE','GeometryType(g)\n\nReturns as a binary string the name of the geometry type of which the\ngeometry instance g is a member. The name corresponds to one of the\ninstantiable Geometry subclasses.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#general-geometry-property-functions\n\n','mysql> SELECT GeometryType(GeomFromText(\'POINT(1 1)\'));\n+------------------------------------------+\n| GeometryType(GeomFromText(\'POINT(1 1)\')) |\n+------------------------------------------+\n| POINT |\n+------------------------------------------+\n','http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#general-geometry-property-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (454,39,'CREATE VIEW','Syntax:\nCREATE\n [OR REPLACE]\n [ALGORITHM = {UNDEFINED | MERGE | TEMPTABLE}]\n [DEFINER = { user | CURRENT_USER }]\n [SQL SECURITY { DEFINER | INVOKER }]\n VIEW view_name [(column_list)]\n AS select_statement\n [WITH [CASCADED | LOCAL] CHECK OPTION]\n\nThe CREATE VIEW statement creates a new view, or replaces an existing\none if the OR REPLACE clause is given. If the view does not exist,\nCREATE OR REPLACE VIEW is the same as CREATE VIEW. If the view does\nexist, CREATE OR REPLACE VIEW is the same as ALTER VIEW.\n\nThe select_statement is a SELECT statement that provides the definition\nof the view. (When you select from the view, you select in effect using\nthe SELECT statement.) select_statement can select from base tables or\nother views.\n\nThe view definition is "frozen" at creation time, so changes to the\nunderlying tables afterward do not affect the view definition. For\nexample, if a view is defined as SELECT * on a table, new columns added\nto the table later do not become part of the view.\n\nThe ALGORITHM clause affects how MySQL processes the view. The DEFINER\nand SQL SECURITY clauses specify the security context to be used when\nchecking access privileges at view invocation time. The WITH CHECK\nOPTION clause can be given to constrain inserts or updates to rows in\ntables referenced by the view. These clauses are described later in\nthis section.\n\nThe CREATE VIEW statement requires the CREATE VIEW privilege for the\nview, and some privilege for each column selected by the SELECT\nstatement. For columns used elsewhere in the SELECT statement you must\nhave the SELECT privilege. If the OR REPLACE clause is present, you\nmust also have the DROP privilege for the view. CREATE VIEW might also\nrequire the SUPER privilege, depending on the DEFINER value, as\ndescribed later in this section.\n\nWhen a view is referenced, privilege checking occurs as described later\nin this section.\n\nA view belongs to a database. By default, a new view is created in the\ndefault database. To create the view explicitly in a given database,\nspecify the name as db_name.view_name when you create it:\n\nmysql> CREATE VIEW test.v AS SELECT * FROM t;\n\nWithin a database, base tables and views share the same namespace, so a\nbase table and a view cannot have the same name.\n\nColumns retrieved by the SELECT statement can be simple references to\ntable columns. They can also be expressions that use functions,\nconstant values, operators, and so forth.\n\nViews must have unique column names with no duplicates, just like base\ntables. By default, the names of the columns retrieved by the SELECT\nstatement are used for the view column names. To define explicit names\nfor the view columns, the optional column_list clause can be given as a\nlist of comma-separated identifiers. The number of names in column_list\nmust be the same as the number of columns retrieved by the SELECT\nstatement.\n\nUnqualified table or view names in the SELECT statement are interpreted\nwith respect to the default database. A view can refer to tables or\nviews in other databases by qualifying the table or view name with the\nproper database name.\n\nA view can be created from many kinds of SELECT statements. It can\nrefer to base tables or other views. It can use joins, UNION, and\nsubqueries. The SELECT need not even refer to any tables. The following\nexample defines a view that selects two columns from another table, as\nwell as an expression calculated from those columns:\n\nmysql> CREATE TABLE t (qty INT, price INT);\nmysql> INSERT INTO t VALUES(3, 50);\nmysql> CREATE VIEW v AS SELECT qty, price, qty*price AS value FROM t;\nmysql> SELECT * FROM v;\n+------+-------+-------+\n| qty | price | value |\n+------+-------+-------+\n| 3 | 50 | 150 |\n+------+-------+-------+\n\nA view definition is subject to the following restrictions:\n\no The SELECT statement cannot contain a subquery in the FROM clause.\n\no The SELECT statement cannot refer to system or user variables.\n\no Within a stored program, the definition cannot refer to program\n parameters or local variables.\n\no The SELECT statement cannot refer to prepared statement parameters.\n\no Any table or view referred to in the definition must exist. However,\n after a view has been created, it is possible to drop a table or view\n that the definition refers to. In this case, use of the view results\n in an error. To check a view definition for problems of this kind,\n use the CHECK TABLE statement.\n\no The definition cannot refer to a TEMPORARY table, and you cannot\n create a TEMPORARY view.\n\no Any tables named in the view definition must exist at definition\n time.\n\no You cannot associate a trigger with a view.\n\no Aliases for column names in the SELECT statement are checked against\n the maximum column length of 64 characters (not the maximum alias\n length of 256 characters).\n\nORDER BY is permitted in a view definition, but it is ignored if you\nselect from a view using a statement that has its own ORDER BY.\n\nFor other options or clauses in the definition, they are added to the\noptions or clauses of the statement that references the view, but the\neffect is undefined. For example, if a view definition includes a LIMIT\nclause, and you select from the view using a statement that has its own\nLIMIT clause, it is undefined which limit applies. This same principle\napplies to options such as ALL, DISTINCT, or SQL_SMALL_RESULT that\nfollow the SELECT keyword, and to clauses such as INTO, FOR UPDATE,\nLOCK IN SHARE MODE, and PROCEDURE.\n\nIf you create a view and then change the query processing environment\nby changing system variables, that may affect the results that you get\nfrom the view:\n\nmysql> CREATE VIEW v (mycol) AS SELECT \'abc\';\nQuery OK, 0 rows affected (0.01 sec)\n\nmysql> SET sql_mode = \'\';\nQuery OK, 0 rows affected (0.00 sec)\n\nmysql> SELECT "mycol" FROM v;\n+-------+\n| mycol |\n+-------+\n| mycol |\n+-------+\n1 row in set (0.01 sec)\n\nmysql> SET sql_mode = \'ANSI_QUOTES\';\nQuery OK, 0 rows affected (0.00 sec)\n\nmysql> SELECT "mycol" FROM v;\n+-------+\n| mycol |\n+-------+\n| abc |\n+-------+\n1 row in set (0.00 sec)\n\nThe DEFINER and SQL SECURITY clauses determine which MySQL account to\nuse when checking access privileges for the view when a statement is\nexecuted that references the view. The valid SQL SECURITY\ncharacteristic values are DEFINER and INVOKER. These indicate that the\nrequired privileges must be held by the user who defined or invoked the\nview, respectively. The default SQL SECURITY value is DEFINER.\n\nIf a user value is given for the DEFINER clause, it should be a MySQL\naccount specified as \'user_name\'@\'host_name\' (the same format used in\nthe GRANT statement), CURRENT_USER, or CURRENT_USER(). The default\nDEFINER value is the user who executes the CREATE VIEW statement. This\nis the same as specifying DEFINER = CURRENT_USER explicitly.\n\nIf you specify the DEFINER clause, these rules determine the valid\nDEFINER user values:\n\no If you do not have the SUPER privilege, the only valid user value is\n your own account, either specified literally or by using\n CURRENT_USER. You cannot set the definer to some other account.\n\no If you have the SUPER privilege, you can specify any syntactically\n valid account name. If the account does not actually exist, a warning\n is generated.\n\no Although it is possible to create a view with a nonexistent DEFINER\n account, an error occurs when the view is referenced if the SQL\n SECURITY value is DEFINER but the definer account does not exist.\n\nFor more information about view security, see\nhttp://dev.mysql.com/doc/refman/5.5/en/stored-programs-security.html.\n\nWithin a view definition, CURRENT_USER returns the view\'s DEFINER value\nby default. For views defined with the SQL SECURITY INVOKER\ncharacteristic, CURRENT_USER returns the account for the view\'s\ninvoker. For information about user auditing within views, see\nhttp://dev.mysql.com/doc/refman/5.5/en/account-activity-auditing.html.\n\nWithin a stored routine that is defined with the SQL SECURITY DEFINER\ncharacteristic, CURRENT_USER returns the routine\'s DEFINER value. This\nalso affects a view defined within such a routine, if the view\ndefinition contains a DEFINER value of CURRENT_USER.\n\nView privileges are checked like this:\n\no At view definition time, the view creator must have the privileges\n needed to use the top-level objects accessed by the view. For\n example, if the view definition refers to table columns, the creator\n must have some privilege for each column in the select list of the\n definition, and the SELECT privilege for each column used elsewhere\n in the definition. If the definition refers to a stored function,\n only the privileges needed to invoke the function can be checked. The\n privileges required at function invocation time can be checked only\n as it executes: For different invocations, different execution paths\n within the function might be taken.\n\no The user who references a view must have appropriate privileges to\n access it (SELECT to select from it, INSERT to insert into it, and so\n forth.)\n\no When a view has been referenced, privileges for objects accessed by\n the view are checked against the privileges held by the view DEFINER\n account or invoker, depending on whether the SQL SECURITY\n characteristic is DEFINER or INVOKER, respectively.\n\no If reference to a view causes execution of a stored function,\n privilege checking for statements executed within the function depend\n on whether the function SQL SECURITY characteristic is DEFINER or\n INVOKER. If the security characteristic is DEFINER, the function runs\n with the privileges of the DEFINER account. If the characteristic is\n INVOKER, the function runs with the privileges determined by the\n view\'s SQL SECURITY characteristic.\n\nExample: A view might depend on a stored function, and that function\nmight invoke other stored routines. For example, the following view\ninvokes a stored function f():\n\nCREATE VIEW v AS SELECT * FROM t WHERE t.id = f(t.name);\n\nSuppose that f() contains a statement such as this:\n\nIF name IS NULL then\n CALL p1();\nELSE\n CALL p2();\nEND IF;\n\nThe privileges required for executing statements within f() need to be\nchecked when f() executes. This might mean that privileges are needed\nfor p1() or p2(), depending on the execution path within f(). Those\nprivileges must be checked at runtime, and the user who must possess\nthe privileges is determined by the SQL SECURITY values of the view v\nand the function f().\n\nThe DEFINER and SQL SECURITY clauses for views are extensions to\nstandard SQL. In standard SQL, views are handled using the rules for\nSQL SECURITY DEFINER. The standard says that the definer of the view,\nwhich is the same as the owner of the view\'s schema, gets applicable\nprivileges on the view (for example, SELECT) and may grant them. MySQL\nhas no concept of a schema "owner", so MySQL adds a clause to identify\nthe definer. The DEFINER clause is an extension where the intent is to\nhave what the standard has; that is, a permanent record of who defined\nthe view. This is why the default DEFINER value is the account of the\nview creator.\n\nThe optional ALGORITHM clause is a MySQL extension to standard SQL. It\naffects how MySQL processes the view. ALGORITHM takes three values:\nMERGE, TEMPTABLE, or UNDEFINED. The default algorithm is UNDEFINED if\nno ALGORITHM clause is present. For more information, see\nhttp://dev.mysql.com/doc/refman/5.5/en/view-algorithms.html.\n\nSome views are updatable. That is, you can use them in statements such\nas UPDATE, DELETE, or INSERT to update the contents of the underlying\ntable. For a view to be updatable, there must be a one-to-one\nrelationship between the rows in the view and the rows in the\nunderlying table. There are also certain other constructs that make a\nview nonupdatable.\n\nThe WITH CHECK OPTION clause can be given for an updatable view to\nprevent inserts or updates to rows except those for which the WHERE\nclause in the select_statement is true.\n\nIn a WITH CHECK OPTION clause for an updatable view, the LOCAL and\nCASCADED keywords determine the scope of check testing when the view is\ndefined in terms of another view. The LOCAL keyword restricts the CHECK\nOPTION only to the view being defined. CASCADED causes the checks for\nunderlying views to be evaluated as well. When neither keyword is\ngiven, the default is CASCADED.\n\nFor more information about updatable views and the WITH CHECK OPTION\nclause, see\nhttp://dev.mysql.com/doc/refman/5.5/en/view-updatability.html.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/create-view.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/create-view.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (455,37,'TRIM','Syntax:\nTRIM([{BOTH | LEADING | TRAILING} [remstr] FROM] str), TRIM([remstr\nFROM] str)\n\nReturns the string str with all remstr prefixes or suffixes removed. If\nnone of the specifiers BOTH, LEADING, or TRAILING is given, BOTH is\nassumed. remstr is optional and, if not specified, spaces are removed.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','mysql> SELECT TRIM(\' bar \');\n -> \'bar\'\nmysql> SELECT TRIM(LEADING \'x\' FROM \'xxxbarxxx\');\n -> \'barxxx\'\nmysql> SELECT TRIM(BOTH \'x\' FROM \'xxxbarxxx\');\n -> \'bar\'\nmysql> SELECT TRIM(TRAILING \'xyz\' FROM \'barxxyz\');\n -> \'barx\'\n','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (456,18,'IS','Syntax:\nIS boolean_value\n\nTests a value against a boolean value, where boolean_value can be TRUE,\nFALSE, or UNKNOWN.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html\n\n','mysql> SELECT 1 IS TRUE, 0 IS FALSE, NULL IS UNKNOWN;\n -> 1, 1, 1\n','http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (457,31,'GET_FORMAT','Syntax:\nGET_FORMAT({DATE|TIME|DATETIME}, {\'EUR\'|\'USA\'|\'JIS\'|\'ISO\'|\'INTERNAL\'})\n\nReturns a format string. This function is useful in combination with\nthe DATE_FORMAT() and the STR_TO_DATE() functions.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT DATE_FORMAT(\'2003-10-03\',GET_FORMAT(DATE,\'EUR\'));\n -> \'03.10.2003\'\nmysql> SELECT STR_TO_DATE(\'10.31.2003\',GET_FORMAT(DATE,\'USA\'));\n -> \'2003-10-31\'\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (458,22,'TINYBLOB','TINYBLOB\n\nA BLOB column with a maximum length of 255 (28 - 1) bytes. Each\nTINYBLOB value is stored using a 1-byte length prefix that indicates\nthe number of bytes in the value.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/string-type-overview.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (459,23,'SIGNAL','Syntax:\nSIGNAL condition_value\n [SET signal_information_item\n [, signal_information_item] ...]\n\ncondition_value:\n SQLSTATE [VALUE] sqlstate_value\n | condition_name\n\nsignal_information_item:\n condition_information_item_name = simple_value_specification\n\ncondition_information_item_name:\n CLASS_ORIGIN\n | SUBCLASS_ORIGIN\n | MESSAGE_TEXT\n | MYSQL_ERRNO\n | CONSTRAINT_CATALOG\n | CONSTRAINT_SCHEMA\n | CONSTRAINT_NAME\n | CATALOG_NAME\n | SCHEMA_NAME\n | TABLE_NAME\n | COLUMN_NAME\n | CURSOR_NAME\n\ncondition_name, simple_value_specification:\n (see following discussion)\n\nSIGNAL is the way to "return" an error. SIGNAL provides error\ninformation to a handler, to an outer portion of the application, or to\nthe client. Also, it provides control over the error\'s characteristics\n(error number, SQLSTATE value, message). Without SIGNAL, it is\nnecessary to resort to workarounds such as deliberately referring to a\nnonexistent table to cause a routine to return an error.\n\nNo special privileges are required to execute the SIGNAL statement.\n\nThe condition_value in a SIGNAL statement indicates the error value to\nbe returned. It can be an SQLSTATE value (a 5-character string literal)\nor a condition_name that refers to a named condition previously defined\nwith DECLARE ... CONDITION (see [HELP DECLARE CONDITION]).\n\nAn SQLSTATE value can indicate errors, warnings, or "not found." The\nfirst two characters of the value indicate its error class, as\ndiscussed in\nhttp://dev.mysql.com/doc/refman/5.5/en/signal.html#signal-condition-inf\normation-items. Some signal values cause statement termination; see\nhttp://dev.mysql.com/doc/refman/5.5/en/signal.html#signal-effects.\n\nThe SQLSTATE value for a SIGNAL statement should not start with \'00\'\nbecause such values indicate success and are not valid for signaling an\nerror. This is true whether the SQLSTATE value is specified directly in\nthe SIGNAL statement or in a named condition referred to in the\nstatement. If the value is invalid, a Bad SQLSTATE error occurs.\n\nTo signal a generic SQLSTATE value, use \'45000\', which means "unhandled\nuser-defined exception."\n\nThe SIGNAL statement optionally includes a SET clause that contains\nmultiple signal items, in a comma-separated list of\ncondition_information_item_name = simple_value_specification\nassignments.\n\nEach condition_information_item_name may be specified only once in the\nSET clause. Otherwise, a Duplicate condition information item error\noccurs.\n\nValid simple_value_specification designators can be specified using\nstored procedure or function parameters, stored program local variables\ndeclared with DECLARE, user-defined variables, system variables, or\nliterals. A character literal may include a _charset introducer.\n\nFor information about permissible condition_information_item_name\nvalues, see\nhttp://dev.mysql.com/doc/refman/5.5/en/signal.html#signal-condition-inf\normation-items.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/signal.html\n\n','CREATE PROCEDURE p (pval INT)\nBEGIN\n DECLARE specialty CONDITION FOR SQLSTATE \'45000\';\n IF pval = 0 THEN\n SIGNAL SQLSTATE \'01000\';\n ELSEIF pval = 1 THEN\n SIGNAL SQLSTATE \'45000\'\n SET MESSAGE_TEXT = \'An error occurred\';\n ELSEIF pval = 2 THEN\n SIGNAL specialty\n SET MESSAGE_TEXT = \'An error occurred\';\n ELSE\n SIGNAL SQLSTATE \'01000\'\n SET MESSAGE_TEXT = \'A warning occurred\', MYSQL_ERRNO = 1000;\n SIGNAL SQLSTATE \'45000\'\n SET MESSAGE_TEXT = \'An error occurred\', MYSQL_ERRNO = 1001;\n END IF;\nEND;\n','http://dev.mysql.com/doc/refman/5.5/en/signal.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (460,8,'SAVEPOINT','Syntax:\nSAVEPOINT identifier\nROLLBACK [WORK] TO [SAVEPOINT] identifier\nRELEASE SAVEPOINT identifier\n\nInnoDB supports the SQL statements SAVEPOINT, ROLLBACK TO SAVEPOINT,\nRELEASE SAVEPOINT and the optional WORK keyword for ROLLBACK.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/savepoint.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/savepoint.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (461,17,'USER','Syntax:\nUSER()\n\nReturns the current MySQL user name and host name as a string in the\nutf8 character set.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/information-functions.html\n\n','mysql> SELECT USER();\n -> \'davida@localhost\'\n','http://dev.mysql.com/doc/refman/5.5/en/information-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (462,23,'LABELS','Syntax:\n[begin_label:] BEGIN\n [statement_list]\nEND [end_label]\n\n[begin_label:] LOOP\n statement_list\nEND LOOP [end_label]\n\n[begin_label:] REPEAT\n statement_list\nUNTIL search_condition\nEND REPEAT [end_label]\n\n[begin_label:] WHILE search_condition DO\n statement_list\nEND WHILE [end_label]\n\nLabels are permitted for BEGIN ... END blocks and for the LOOP, REPEAT,\nand WHILE statements. Label use for those statements follows these\nrules:\n\no begin_label must be followed by a colon.\n\no begin_label can be given without end_label. If end_label is present,\n it must be the same as begin_label.\n\no end_label cannot be given without begin_label.\n\no Labels at the same nesting level must be distinct.\n\no Labels can be up to 16 characters long.\n\nTo refer to a label within the labeled construct, use an ITERATE or\nLEAVE statement. The following example uses those statements to\ncontinue iterating or terminate the loop:\n\nCREATE PROCEDURE doiterate(p1 INT)\nBEGIN\n label1: LOOP\n SET p1 = p1 + 1;\n IF p1 < 10 THEN ITERATE label1; END IF;\n LEAVE label1;\n END LOOP label1;\nEND;\n\nThe scope of a block label does not include the code for handlers\ndeclared within the block. For details, see [HELP DECLARE HANDLER].\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/statement-labels.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/statement-labels.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (463,39,'ALTER TABLE','Syntax:\nALTER [ONLINE | OFFLINE] [IGNORE] TABLE tbl_name\n [alter_specification [, alter_specification] ...]\n [partition_options]\n\nalter_specification:\n table_options\n | ADD [COLUMN] col_name column_definition\n [FIRST | AFTER col_name ]\n | ADD [COLUMN] (col_name column_definition,...)\n | ADD {INDEX|KEY} [index_name]\n [index_type] (index_col_name,...) [index_option] ...\n | ADD [CONSTRAINT [symbol]] PRIMARY KEY\n [index_type] (index_col_name,...) [index_option] ...\n | ADD [CONSTRAINT [symbol]]\n UNIQUE [INDEX|KEY] [index_name]\n [index_type] (index_col_name,...) [index_option] ...\n | ADD FULLTEXT [INDEX|KEY] [index_name]\n (index_col_name,...) [index_option] ...\n | ADD SPATIAL [INDEX|KEY] [index_name]\n (index_col_name,...) [index_option] ...\n | ADD [CONSTRAINT [symbol]]\n FOREIGN KEY [index_name] (index_col_name,...)\n reference_definition\n | ALTER [COLUMN] col_name {SET DEFAULT literal | DROP DEFAULT}\n | CHANGE [COLUMN] old_col_name new_col_name column_definition\n [FIRST|AFTER col_name]\n | MODIFY [COLUMN] col_name column_definition\n [FIRST | AFTER col_name]\n | DROP [COLUMN] col_name\n | DROP PRIMARY KEY\n | DROP {INDEX|KEY} index_name\n | DROP FOREIGN KEY fk_symbol\n | MAX_ROWS = rows\n | DISABLE KEYS\n | ENABLE KEYS\n | RENAME [TO|AS] new_tbl_name\n | ORDER BY col_name [, col_name] ...\n | CONVERT TO CHARACTER SET charset_name [COLLATE collation_name]\n | [DEFAULT] CHARACTER SET [=] charset_name [COLLATE [=] collation_name]\n | DISCARD TABLESPACE\n | IMPORT TABLESPACE\n | FORCE\n | ADD PARTITION (partition_definition)\n | DROP PARTITION partition_names\n | TRUNCATE PARTITION {partition_names | ALL}\n | COALESCE PARTITION number\n | REORGANIZE PARTITION [partition_names INTO (partition_definitions)]\n | ANALYZE PARTITION {partition_names | ALL}\n | CHECK PARTITION {partition_names | ALL}\n | OPTIMIZE PARTITION {partition_names | ALL}\n | REBUILD PARTITION {partition_names | ALL}\n | REPAIR PARTITION {partition_names | ALL}\n | PARTITION BY partitioning_expression\n | REMOVE PARTITIONING\n\nindex_col_name:\n col_name [(length)] [ASC | DESC]\n\nindex_type:\n USING {BTREE | HASH}\n\nindex_option:\n KEY_BLOCK_SIZE [=] value\n | index_type\n | WITH PARSER parser_name\n | COMMENT \'string\'\n\ntable_options:\n table_option [[,] table_option] ... (see CREATE TABLE options)\n\npartition_options:\n (see CREATE TABLE options)\n\nALTER TABLE changes the structure of a table. For example, you can add\nor delete columns, create or destroy indexes, change the type of\nexisting columns, or rename columns or the table itself. You can also\nchange characteristics such as the storage engine used for the table or\nthe table comment.\n\nPartitioning-related clauses for ALTER TABLE can be used with\npartitioned tables for repartitioning, for adding, dropping, merging,\nand splitting partitions, and for performing partitioning maintenance.\nFor more information, see\nhttp://dev.mysql.com/doc/refman/5.5/en/alter-table-partition-operations\n.html.\n\nFollowing the table name, specify the alterations to be made. If none\nare given, ALTER TABLE does nothing.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/alter-table.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/alter-table.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (464,32,'MPOINTFROMWKB','MPointFromWKB(wkb[,srid]), MultiPointFromWKB(wkb[,srid])\n\nConstructs a MULTIPOINT value using its WKB representation and SRID.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-wkb-functions\n\n','','http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-wkb-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (465,22,'CHAR BYTE','The CHAR BYTE data type is an alias for the BINARY data type. This is a\ncompatibility feature.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/string-type-overview.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (466,20,'REPAIR TABLE','Syntax:\nREPAIR [NO_WRITE_TO_BINLOG | LOCAL] TABLE\n tbl_name [, tbl_name] ...\n [QUICK] [EXTENDED] [USE_FRM]\n\nREPAIR TABLE repairs a possibly corrupted table. By default, it has the\nsame effect as myisamchk --recover tbl_name. REPAIR TABLE works for\nMyISAM, ARCHIVE, and CSV tables. See\nhttp://dev.mysql.com/doc/refman/5.5/en/myisam-storage-engine.html, and\nhttp://dev.mysql.com/doc/refman/5.5/en/archive-storage-engine.html, and\nhttp://dev.mysql.com/doc/refman/5.5/en/csv-storage-engine.html\n\nThis statement requires SELECT and INSERT privileges for the table.\n\nREPAIR TABLE is supported for partitioned tables. However, the USE_FRM\noption cannot be used with this statement on a partitioned table.\n\nYou can use ALTER TABLE ... REPAIR PARTITION to repair one or more\npartitions; for more information, see [HELP ALTER TABLE], and\nhttp://dev.mysql.com/doc/refman/5.5/en/partitioning-maintenance.html.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/repair-table.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/repair-table.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (467,39,'MERGE','The MERGE storage engine, also known as the MRG_MyISAM engine, is a\ncollection of identical MyISAM tables that can be used as one.\n"Identical" means that all tables have identical column and index\ninformation. You cannot merge MyISAM tables in which the columns are\nlisted in a different order, do not have exactly the same columns, or\nhave the indexes in different order. However, any or all of the MyISAM\ntables can be compressed with myisampack. See\nhttp://dev.mysql.com/doc/refman/5.5/en/myisampack.html. Differences in\ntable options such as AVG_ROW_LENGTH, MAX_ROWS, or PACK_KEYS do not\nmatter.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/merge-storage-engine.html\n\n','mysql> CREATE TABLE t1 (\n -> a INT NOT NULL AUTO_INCREMENT PRIMARY KEY,\n -> message CHAR(20)) ENGINE=MyISAM;\nmysql> CREATE TABLE t2 (\n -> a INT NOT NULL AUTO_INCREMENT PRIMARY KEY,\n -> message CHAR(20)) ENGINE=MyISAM;\nmysql> INSERT INTO t1 (message) VALUES (\'Testing\'),(\'table\'),(\'t1\');\nmysql> INSERT INTO t2 (message) VALUES (\'Testing\'),(\'table\'),(\'t2\');\nmysql> CREATE TABLE total (\n -> a INT NOT NULL AUTO_INCREMENT,\n -> message CHAR(20), INDEX(a))\n -> ENGINE=MERGE UNION=(t1,t2) INSERT_METHOD=LAST;\n','http://dev.mysql.com/doc/refman/5.5/en/merge-storage-engine.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (468,39,'CREATE TABLE','Syntax:\nCREATE [TEMPORARY] TABLE [IF NOT EXISTS] tbl_name\n (create_definition,...)\n [table_options]\n [partition_options]\n\nOr:\n\nCREATE [TEMPORARY] TABLE [IF NOT EXISTS] tbl_name\n [(create_definition,...)]\n [table_options]\n [partition_options]\n select_statement\n\nOr:\n\nCREATE [TEMPORARY] TABLE [IF NOT EXISTS] tbl_name\n { LIKE old_tbl_name | (LIKE old_tbl_name) }\n\ncreate_definition:\n col_name column_definition\n | [CONSTRAINT [symbol]] PRIMARY KEY [index_type] (index_col_name,...)\n [index_option] ...\n | {INDEX|KEY} [index_name] [index_type] (index_col_name,...)\n [index_option] ...\n | [CONSTRAINT [symbol]] UNIQUE [INDEX|KEY]\n [index_name] [index_type] (index_col_name,...)\n [index_option] ...\n | {FULLTEXT|SPATIAL} [INDEX|KEY] [index_name] (index_col_name,...)\n [index_option] ...\n | [CONSTRAINT [symbol]] FOREIGN KEY\n [index_name] (index_col_name,...) reference_definition\n | CHECK (expr)\n\ncolumn_definition:\n data_type [NOT NULL | NULL] [DEFAULT default_value]\n [AUTO_INCREMENT] [UNIQUE [KEY] | [PRIMARY] KEY]\n [COMMENT \'string\']\n [COLUMN_FORMAT {FIXED|DYNAMIC|DEFAULT}]\n [STORAGE {DISK|MEMORY|DEFAULT}]\n [reference_definition]\n\ndata_type:\n BIT[(length)]\n | TINYINT[(length)] [UNSIGNED] [ZEROFILL]\n | SMALLINT[(length)] [UNSIGNED] [ZEROFILL]\n | MEDIUMINT[(length)] [UNSIGNED] [ZEROFILL]\n | INT[(length)] [UNSIGNED] [ZEROFILL]\n | INTEGER[(length)] [UNSIGNED] [ZEROFILL]\n | BIGINT[(length)] [UNSIGNED] [ZEROFILL]\n | REAL[(length,decimals)] [UNSIGNED] [ZEROFILL]\n | DOUBLE[(length,decimals)] [UNSIGNED] [ZEROFILL]\n | FLOAT[(length,decimals)] [UNSIGNED] [ZEROFILL]\n | DECIMAL[(length[,decimals])] [UNSIGNED] [ZEROFILL]\n | NUMERIC[(length[,decimals])] [UNSIGNED] [ZEROFILL]\n | DATE\n | TIME\n | TIMESTAMP\n | DATETIME\n | YEAR\n | CHAR[(length)]\n [CHARACTER SET charset_name] [COLLATE collation_name]\n | VARCHAR(length)\n [CHARACTER SET charset_name] [COLLATE collation_name]\n | BINARY[(length)]\n | VARBINARY(length)\n | TINYBLOB\n | BLOB\n | MEDIUMBLOB\n | LONGBLOB\n | TINYTEXT [BINARY]\n [CHARACTER SET charset_name] [COLLATE collation_name]\n | TEXT [BINARY]\n [CHARACTER SET charset_name] [COLLATE collation_name]\n | MEDIUMTEXT [BINARY]\n [CHARACTER SET charset_name] [COLLATE collation_name]\n | LONGTEXT [BINARY]\n [CHARACTER SET charset_name] [COLLATE collation_name]\n | ENUM(value1,value2,value3,...)\n [CHARACTER SET charset_name] [COLLATE collation_name]\n | SET(value1,value2,value3,...)\n [CHARACTER SET charset_name] [COLLATE collation_name]\n | spatial_type\n\nindex_col_name:\n col_name [(length)] [ASC | DESC]\n\nindex_type:\n USING {BTREE | HASH}\n\nindex_option:\n KEY_BLOCK_SIZE [=] value\n | index_type\n | WITH PARSER parser_name\n | COMMENT \'string\'\n\nreference_definition:\n REFERENCES tbl_name (index_col_name,...)\n [MATCH FULL | MATCH PARTIAL | MATCH SIMPLE]\n [ON DELETE reference_option]\n [ON UPDATE reference_option]\n\nreference_option:\n RESTRICT | CASCADE | SET NULL | NO ACTION\n\ntable_options:\n table_option [[,] table_option] ...\n\ntable_option:\n ENGINE [=] engine_name\n | AUTO_INCREMENT [=] value\n | AVG_ROW_LENGTH [=] value\n | [DEFAULT] CHARACTER SET [=] charset_name\n | CHECKSUM [=] {0 | 1}\n | [DEFAULT] COLLATE [=] collation_name\n | COMMENT [=] \'string\'\n | CONNECTION [=] \'connect_string\'\n | DATA DIRECTORY [=] \'absolute path to directory\'\n | DELAY_KEY_WRITE [=] {0 | 1}\n | INDEX DIRECTORY [=] \'absolute path to directory\'\n | INSERT_METHOD [=] { NO | FIRST | LAST }\n | KEY_BLOCK_SIZE [=] value\n | MAX_ROWS [=] value\n | MIN_ROWS [=] value\n | PACK_KEYS [=] {0 | 1 | DEFAULT}\n | PASSWORD [=] \'string\'\n | ROW_FORMAT [=] {DEFAULT|DYNAMIC|FIXED|COMPRESSED|REDUNDANT|COMPACT}\n | TABLESPACE tablespace_name [STORAGE {DISK|MEMORY|DEFAULT}]\n | UNION [=] (tbl_name[,tbl_name]...)\n\npartition_options:\n PARTITION BY\n { [LINEAR] HASH(expr)\n | [LINEAR] KEY(column_list)\n | RANGE{(expr) | COLUMNS(column_list)}\n | LIST{(expr) | COLUMNS(column_list)} }\n [PARTITIONS num]\n [SUBPARTITION BY\n { [LINEAR] HASH(expr)\n | [LINEAR] KEY(column_list) }\n [SUBPARTITIONS num]\n ]\n [(partition_definition [, partition_definition] ...)]\n\npartition_definition:\n PARTITION partition_name\n [VALUES \n {LESS THAN {(expr | value_list) | MAXVALUE} \n | \n IN (value_list)}]\n [[STORAGE] ENGINE [=] engine_name]\n [COMMENT [=] \'comment_text\' ]\n [DATA DIRECTORY [=] \'data_dir\']\n [INDEX DIRECTORY [=] \'index_dir\']\n [MAX_ROWS [=] max_number_of_rows]\n [MIN_ROWS [=] min_number_of_rows]\n [TABLESPACE [=] tablespace_name]\n [NODEGROUP [=] node_group_id]\n [(subpartition_definition [, subpartition_definition] ...)]\n\nsubpartition_definition:\n SUBPARTITION logical_name\n [[STORAGE] ENGINE [=] engine_name]\n [COMMENT [=] \'comment_text\' ]\n [DATA DIRECTORY [=] \'data_dir\']\n [INDEX DIRECTORY [=] \'index_dir\']\n [MAX_ROWS [=] max_number_of_rows]\n [MIN_ROWS [=] min_number_of_rows]\n [TABLESPACE [=] tablespace_name]\n [NODEGROUP [=] node_group_id]\n\nselect_statement:\n [IGNORE | REPLACE] [AS] SELECT ... (Some valid select statement)\n\nCREATE TABLE creates a table with the given name. You must have the\nCREATE privilege for the table.\n\nRules for permissible table names are given in\nhttp://dev.mysql.com/doc/refman/5.5/en/identifiers.html. By default,\nthe table is created in the default database, using the InnoDB storage\nengine. An error occurs if the table exists, if there is no default\ndatabase, or if the database does not exist.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/create-table.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/create-table.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (469,18,'>','Syntax:\n>\n\nGreater than:\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html\n\n','mysql> SELECT 2 > 2;\n -> 0\n','http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (470,20,'ANALYZE TABLE','Syntax:\nANALYZE [NO_WRITE_TO_BINLOG | LOCAL] TABLE\n tbl_name [, tbl_name] ...\n\nANALYZE TABLE analyzes and stores the key distribution for a table.\nDuring the analysis, the table is locked with a read lock for InnoDB\nand MyISAM. This statement works with InnoDB, NDB, and MyISAM tables.\nFor MyISAM tables, this statement is equivalent to using myisamchk\n--analyze.\n\nFor more information on how the analysis works within InnoDB, see\nhttp://dev.mysql.com/doc/refman/5.5/en/innodb-restrictions.html.\n\nMySQL uses the stored key distribution to decide the order in which\ntables should be joined when you perform a join on something other than\na constant. In addition, key distributions can be used when deciding\nwhich indexes to use for a specific table within a query.\n\nThis statement requires SELECT and INSERT privileges for the table.\n\nANALYZE TABLE is supported for partitioned tables, and you can use\nALTER TABLE ... ANALYZE PARTITION to analyze one or more partitions;\nfor more information, see [HELP ALTER TABLE], and\nhttp://dev.mysql.com/doc/refman/5.5/en/partitioning-maintenance.html.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/analyze-table.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/analyze-table.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (471,31,'MICROSECOND','Syntax:\nMICROSECOND(expr)\n\nReturns the microseconds from the time or datetime expression expr as a\nnumber in the range from 0 to 999999.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT MICROSECOND(\'12:00:00.123456\');\n -> 123456\nmysql> SELECT MICROSECOND(\'2009-12-31 23:59:59.000010\');\n -> 10\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (472,39,'CONSTRAINT','InnoDB supports foreign keys, which let you cross-reference related\ndata across tables, and foreign key constraints, which help keep this\nspread-out data consistent. The syntax for an InnoDB foreign key\nconstraint definition in the CREATE TABLE or ALTER TABLE statement\nlooks like this:\n\n[CONSTRAINT [symbol]] FOREIGN KEY\n [index_name] (index_col_name, ...)\n REFERENCES tbl_name (index_col_name,...)\n [ON DELETE reference_option]\n [ON UPDATE reference_option]\n\nreference_option:\n RESTRICT | CASCADE | SET NULL | NO ACTION\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/innodb-foreign-key-constraints.html\n\n','CREATE TABLE product (category INT NOT NULL, id INT NOT NULL,\n price DECIMAL,\n PRIMARY KEY(category, id)) ENGINE=INNODB;\nCREATE TABLE customer (id INT NOT NULL,\n PRIMARY KEY (id)) ENGINE=INNODB;\nCREATE TABLE product_order (no INT NOT NULL AUTO_INCREMENT,\n product_category INT NOT NULL,\n product_id INT NOT NULL,\n customer_id INT NOT NULL,\n PRIMARY KEY(no),\n INDEX (product_category, product_id),\n FOREIGN KEY (product_category, product_id)\n REFERENCES product(category, id)\n ON UPDATE CASCADE ON DELETE RESTRICT,\n INDEX (customer_id),\n FOREIGN KEY (customer_id)\n REFERENCES customer(id)) ENGINE=INNODB;\n','http://dev.mysql.com/doc/refman/5.5/en/innodb-foreign-key-constraints.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (473,39,'CREATE SERVER','Syntax:\nCREATE SERVER server_name\n FOREIGN DATA WRAPPER wrapper_name\n OPTIONS (option [, option] ...)\n\noption:\n { HOST character-literal\n | DATABASE character-literal\n | USER character-literal\n | PASSWORD character-literal\n | SOCKET character-literal\n | OWNER character-literal\n | PORT numeric-literal }\n\nThis statement creates the definition of a server for use with the\nFEDERATED storage engine. The CREATE SERVER statement creates a new row\nwithin the servers table within the mysql database. This statement\nrequires the SUPER privilege.\n\nThe server_name should be a unique reference to the server. Server\ndefinitions are global within the scope of the server, it is not\npossible to qualify the server definition to a specific database.\nserver_name has a maximum length of 64 characters (names longer than 64\ncharacters are silently truncated), and is case insensitive. You may\nspecify the name as a quoted string.\n\nThe wrapper_name should be mysql, and may be quoted with single\nquotation marks. Other values for wrapper_name are not currently\nsupported.\n\nFor each option you must specify either a character literal or numeric\nliteral. Character literals are UTF-8, support a maximum length of 64\ncharacters and default to a blank (empty) string. String literals are\nsilently truncated to 64 characters. Numeric literals must be a number\nbetween 0 and 9999, default value is 0.\n\n*Note*: Note that the OWNER option is currently not applied, and has no\neffect on the ownership or operation of the server connection that is\ncreated.\n\nThe CREATE SERVER statement creates an entry in the mysql.servers table\nthat can later be used with the CREATE TABLE statement when creating a\nFEDERATED table. The options that you specify will be used to populate\nthe columns in the mysql.servers table. The table columns are\nServer_name, Host, Db, Username, Password, Port and Socket.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/create-server.html\n\n','CREATE SERVER s\nFOREIGN DATA WRAPPER mysql\nOPTIONS (USER \'Remote\', HOST \'192.168.1.106\', DATABASE \'test\');\n','http://dev.mysql.com/doc/refman/5.5/en/create-server.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (474,37,'FIELD','Syntax:\nFIELD(str,str1,str2,str3,...)\n\nReturns the index (position) of str in the str1, str2, str3, ... list.\nReturns 0 if str is not found.\n\nIf all arguments to FIELD() are strings, all arguments are compared as\nstrings. If all arguments are numbers, they are compared as numbers.\nOtherwise, the arguments are compared as double.\n\nIf str is NULL, the return value is 0 because NULL fails equality\ncomparison with any value. FIELD() is the complement of ELT().\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','mysql> SELECT FIELD(\'ej\', \'Hej\', \'ej\', \'Heja\', \'hej\', \'foo\');\n -> 2\nmysql> SELECT FIELD(\'fo\', \'Hej\', \'ej\', \'Heja\', \'hej\', \'foo\');\n -> 0\n','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (475,31,'MAKETIME','Syntax:\nMAKETIME(hour,minute,second)\n\nReturns a time value calculated from the hour, minute, and second\narguments.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT MAKETIME(12,15,30);\n -> \'12:15:30\'\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (476,31,'CURDATE','Syntax:\nCURDATE()\n\nReturns the current date as a value in \'YYYY-MM-DD\' or YYYYMMDD format,\ndepending on whether the function is used in a string or numeric\ncontext.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT CURDATE();\n -> \'2008-06-13\'\nmysql> SELECT CURDATE() + 0;\n -> 20080613\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (477,10,'SET PASSWORD','Syntax:\nSET PASSWORD [FOR user] =\n {\n PASSWORD(\'cleartext password\')\n | OLD_PASSWORD(\'cleartext password\')\n | \'encrypted password\'\n }\n\nThe SET PASSWORD statement assigns a password to an existing MySQL user\naccount. When the read_only system variable is enabled, the SUPER\nprivilege is required to use SET PASSWORD, in addition to whatever\nother privileges might be required.\n\nIf the password is specified using the PASSWORD() or OLD_PASSWORD()\nfunction, the cleartext (unencrypted) password should be given as the\nargument to the function, which hashes the password and returns the\nencrypted password string. If the password is specified without using\neither function, it should be the already encrypted password value as a\nliteral string. In all cases, the encrypted password string must be in\nthe format required by the authentication method used for the account.\n\nThe old_passwords system variable value determines the hashing method\nused by PASSWORD(). If you specify the password using that function and\nSET PASSWORD rejects the password as not being in the correct format,\nit may be necessary to set old_passwords to change the hashing method.\nFor descriptions of the permitted values, see\nhttp://dev.mysql.com/doc/refman/5.5/en/server-system-variables.html.\n\nWith no FOR user clause, this statement sets the password for the\ncurrent user. (To see which account the server authenticated you as,\ninvoke the CURRENT_USER() function.) Any client who successfully\nconnects to the server using a nonanonymous account can change the\npassword for that account.\n\nWith a FOR user clause, this statement sets the password for the named\nuser. You must have the UPDATE privilege for the mysql database to do\nthis. The user account name uses the format described in\nhttp://dev.mysql.com/doc/refman/5.5/en/account-names.html. The user\nvalue should be given as \'user_name\'@\'host_name\', where \'user_name\' and\n\'host_name\' are exactly as listed in the User and Host columns of the\nmysql.user table row. (If you specify only a user name, a host name of\n\'%\' is used.) For example, to set the password for an account with User\nand Host column values of \'bob\' and \'%.example.org\', write the\nstatement like this:\n\nSET PASSWORD FOR \'bob\'@\'%.example.org\' = PASSWORD(\'cleartext password\');\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/set-password.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/set-password.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (478,39,'ALTER TABLESPACE','Syntax:\nALTER TABLESPACE tablespace_name\n {ADD|DROP} DATAFILE \'file_name\'\n [INITIAL_SIZE [=] size]\n [WAIT]\n ENGINE [=] engine_name\n\nThis statement can be used either to add a new data file, or to drop a\ndata file from a tablespace.\n\nThe ADD DATAFILE variant enables you to specify an initial size using\nan INITIAL_SIZE clause, where size is measured in bytes; the default\nvalue is 128M (128 megabytes). You may optionally follow this integer\nvalue with a one-letter abbreviation for an order of magnitude, similar\nto those used in my.cnf. Generally, this is one of the letters M (for\nmegabytes) or G (for gigabytes).\n\n*Note*: All MySQL Cluster Disk Data objects share the same namespace.\nThis means that each Disk Data object must be uniquely named (and not\nmerely each Disk Data object of a given type). For example, you cannot\nhave a tablespace and an data file with the same name, or an undo log\nfile and a tablespace with the same name.\n\nOn 32-bit systems, the maximum supported value for INITIAL_SIZE is 4G.\n(Bug #29186)\n\nINITIAL_SIZE is rounded, explicitly, as for CREATE TABLESPACE.\n\nOnce a data file has been created, its size cannot be changed; however,\nyou can add more data files to the tablespace using additional ALTER\nTABLESPACE ... ADD DATAFILE statements.\n\nUsing DROP DATAFILE with ALTER TABLESPACE drops the data file\n\'file_name\' from the tablespace. You cannot drop a data file from a\ntablespace which is in use by any table; in other words, the data file\nmust be empty (no extents used). See\nhttp://dev.mysql.com/doc/refman/5.5/en/mysql-cluster-disk-data-objects.\nhtml. In addition, any data file to be dropped must previously have\nbeen added to the tablespace with CREATE TABLESPACE or ALTER\nTABLESPACE.\n\nBoth ALTER TABLESPACE ... ADD DATAFILE and ALTER TABLESPACE ... DROP\nDATAFILE require an ENGINE clause which specifies the storage engine\nused by the tablespace. Currently, the only accepted values for\nengine_name are NDB and NDBCLUSTER.\n\nWAIT is parsed but otherwise ignored, and so has no effect in MySQL\n5.5. It is intended for future expansion.\n\nWhen ALTER TABLESPACE ... ADD DATAFILE is used with ENGINE = NDB, a\ndata file is created on each Cluster data node. You can verify that the\ndata files were created and obtain information about them by querying\nthe INFORMATION_SCHEMA.FILES table. For example, the following query\nshows all data files belonging to the tablespace named newts:\n\nmysql> SELECT LOGFILE_GROUP_NAME, FILE_NAME, EXTRA\n -> FROM INFORMATION_SCHEMA.FILES\n -> WHERE TABLESPACE_NAME = \'newts\' AND FILE_TYPE = \'DATAFILE\';\n+--------------------+--------------+----------------+\n| LOGFILE_GROUP_NAME | FILE_NAME | EXTRA |\n+--------------------+--------------+----------------+\n| lg_3 | newdata.dat | CLUSTER_NODE=3 |\n| lg_3 | newdata.dat | CLUSTER_NODE=4 |\n| lg_3 | newdata2.dat | CLUSTER_NODE=3 |\n| lg_3 | newdata2.dat | CLUSTER_NODE=4 |\n+--------------------+--------------+----------------+\n2 rows in set (0.03 sec)\n\nSee http://dev.mysql.com/doc/refman/5.5/en/files-table.html.\n\nALTER TABLESPACE is useful only with Disk Data storage for MySQL\nCluster. See\nhttp://dev.mysql.com/doc/refman/5.5/en/mysql-cluster-disk-data.html.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/alter-tablespace.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/alter-tablespace.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (479,7,'IF FUNCTION','Syntax:\nIF(expr1,expr2,expr3)\n\nIf expr1 is TRUE (expr1 <> 0 and expr1 <> NULL) then IF() returns\nexpr2; otherwise it returns expr3. IF() returns a numeric or string\nvalue, depending on the context in which it is used.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/control-flow-functions.html\n\n','mysql> SELECT IF(1>2,2,3);\n -> 3\nmysql> SELECT IF(1<2,\'yes\',\'no\');\n -> \'yes\'\nmysql> SELECT IF(STRCMP(\'test\',\'test1\'),\'no\',\'yes\');\n -> \'no\'\n','http://dev.mysql.com/doc/refman/5.5/en/control-flow-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (480,22,'ENUM','ENUM(\'value1\',\'value2\',...) [CHARACTER SET charset_name] [COLLATE\ncollation_name]\n\nAn enumeration. A string object that can have only one value, chosen\nfrom the list of values \'value1\', \'value2\', ..., NULL or the special \'\'\nerror value. An ENUM column can have a maximum of 65,535 distinct\nvalues. ENUM values are represented internally as integers.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/string-type-overview.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (481,17,'DATABASE','Syntax:\nDATABASE()\n\nReturns the default (current) database name as a string in the utf8\ncharacter set. If there is no default database, DATABASE() returns\nNULL. Within a stored routine, the default database is the database\nthat the routine is associated with, which is not necessarily the same\nas the database that is the default in the calling context.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/information-functions.html\n\n','mysql> SELECT DATABASE();\n -> \'test\'\n','http://dev.mysql.com/doc/refman/5.5/en/information-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (482,32,'POINTFROMWKB','PointFromWKB(wkb[,srid])\n\nConstructs a POINT value using its WKB representation and SRID.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-wkb-functions\n\n','','http://dev.mysql.com/doc/refman/5.5/en/creating-spatial-values.html#gis-wkb-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (483,4,'POWER','Syntax:\nPOWER(X,Y)\n\nThis is a synonym for POW().\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (484,4,'ATAN','Syntax:\nATAN(X)\n\nReturns the arc tangent of X, that is, the value whose tangent is X.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html\n\n','mysql> SELECT ATAN(2);\n -> 1.1071487177941\nmysql> SELECT ATAN(-2);\n -> -1.1071487177941\n','http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (485,37,'STRCMP','Syntax:\nSTRCMP(expr1,expr2)\n\nSTRCMP() returns 0 if the strings are the same, -1 if the first\nargument is smaller than the second according to the current sort\norder, and 1 otherwise.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-comparison-functions.html\n\n','mysql> SELECT STRCMP(\'text\', \'text2\');\n -> -1\nmysql> SELECT STRCMP(\'text2\', \'text\');\n -> 1\nmysql> SELECT STRCMP(\'text\', \'text\');\n -> 0\n','http://dev.mysql.com/doc/refman/5.5/en/string-comparison-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (486,27,'INSERT DELAYED','Syntax:\nINSERT DELAYED ...\n\nThe DELAYED option for the INSERT statement is a MySQL extension to\nstandard SQL that is very useful if you have clients that cannot or\nneed not wait for the INSERT to complete. This is a common situation\nwhen you use MySQL for logging and you also periodically run SELECT and\nUPDATE statements that take a long time to complete.\n\nWhen a client uses INSERT DELAYED, it gets an okay from the server at\nonce, and the row is queued to be inserted when the table is not in use\nby any other thread.\n\nAnother major benefit of using INSERT DELAYED is that inserts from many\nclients are bundled together and written in one block. This is much\nfaster than performing many separate inserts.\n\nNote that INSERT DELAYED is slower than a normal INSERT if the table is\nnot otherwise in use. There is also the additional overhead for the\nserver to handle a separate thread for each table for which there are\ndelayed rows. This means that you should use INSERT DELAYED only when\nyou are really sure that you need it.\n\nThe queued rows are held only in memory until they are inserted into\nthe table. This means that if you terminate mysqld forcibly (for\nexample, with kill -9) or if mysqld dies unexpectedly, any queued rows\nthat have not been written to disk are lost.\n\nThere are some constraints on the use of DELAYED:\n\no INSERT DELAYED works only with MyISAM, MEMORY, ARCHIVE, and BLACKHOLE\n tables. For engines that do not support DELAYED, an error occurs.\n\no An error occurs for INSERT DELAYED if used with a table that has been\n locked with LOCK TABLES because the insert must be handled by a\n separate thread, not by the session that holds the lock.\n\no For MyISAM tables, if there are no free blocks in the middle of the\n data file, concurrent SELECT and INSERT statements are supported.\n Under these circumstances, you very seldom need to use INSERT DELAYED\n with MyISAM.\n\no INSERT DELAYED should be used only for INSERT statements that specify\n value lists. The server ignores DELAYED for INSERT ... SELECT or\n INSERT ... ON DUPLICATE KEY UPDATE statements.\n\no Because the INSERT DELAYED statement returns immediately, before the\n rows are inserted, you cannot use LAST_INSERT_ID() to get the\n AUTO_INCREMENT value that the statement might generate.\n\no DELAYED rows are not visible to SELECT statements until they actually\n have been inserted.\n\no Prior to MySQL 5.5.7, INSERT DELAYED was treated as a normal INSERT\n if the statement inserted multiple rows, binary logging was enabled,\n and the global logging format was statement-based (that is, whenever\n binlog_format was set to STATEMENT). Beginning with MySQL 5.5.7,\n INSERT DELAYED is always handled as a simple INSERT (that is, without\n the DELAYED option) whenever the value of binlog_format is STATEMENT\n or MIXED. (In the latter case, the statement no longer triggers a\n switch to row-based logging, and so is logged using the\n statement-based format.)\n\n This does not apply when using row-based binary logging mode\n (binlog_format set to ROW), in which INSERT DELAYED statements are\n always executed using the DELAYED option as specified, and logged as\n row-update events.\n\no DELAYED is ignored on slave replication servers, so that INSERT\n DELAYED is treated as a normal INSERT on slaves. This is because\n DELAYED could cause the slave to have different data than the master.\n\no Pending INSERT DELAYED statements are lost if a table is write locked\n and ALTER TABLE is used to modify the table structure.\n\no INSERT DELAYED is not supported for views.\n\no INSERT DELAYED is not supported for partitioned tables.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/insert-delayed.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/insert-delayed.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (487,26,'SHOW PROFILE','Syntax:\nSHOW PROFILE [type [, type] ... ]\n [FOR QUERY n]\n [LIMIT row_count [OFFSET offset]]\n\ntype:\n ALL\n | BLOCK IO\n | CONTEXT SWITCHES\n | CPU\n | IPC\n | MEMORY\n | PAGE FAULTS\n | SOURCE\n | SWAPS\n\nThe SHOW PROFILE and SHOW PROFILES statements display profiling\ninformation that indicates resource usage for statements executed\nduring the course of the current session.\n\nProfiling is controlled by the profiling session variable, which has a\ndefault value of 0 (OFF). Profiling is enabled by setting profiling to\n1 or ON:\n\nmysql> SET profiling = 1;\n\nSHOW PROFILES displays a list of the most recent statements sent to the\nserver. The size of the list is controlled by the\nprofiling_history_size session variable, which has a default value of\n15. The maximum value is 100. Setting the value to 0 has the practical\neffect of disabling profiling.\n\nAll statements are profiled except SHOW PROFILE and SHOW PROFILES, so\nyou will find neither of those statements in the profile list.\nMalformed statements are profiled. For example, SHOW PROFILING is an\nillegal statement, and a syntax error occurs if you try to execute it,\nbut it will show up in the profiling list.\n\nSHOW PROFILE displays detailed information about a single statement.\nWithout the FOR QUERY n clause, the output pertains to the most\nrecently executed statement. If FOR QUERY n is included, SHOW PROFILE\ndisplays information for statement n. The values of n correspond to the\nQuery_ID values displayed by SHOW PROFILES.\n\nThe LIMIT row_count clause may be given to limit the output to\nrow_count rows. If LIMIT is given, OFFSET offset may be added to begin\nthe output offset rows into the full set of rows.\n\nBy default, SHOW PROFILE displays Status and Duration columns. The\nStatus values are like the State values displayed by SHOW PROCESSLIST,\nalthough there might be some minor differences in interpretion for the\ntwo statements for some status values (see\nhttp://dev.mysql.com/doc/refman/5.5/en/thread-information.html).\n\nOptional type values may be specified to display specific additional\ntypes of information:\n\no ALL displays all information\n\no BLOCK IO displays counts for block input and output operations\n\no CONTEXT SWITCHES displays counts for voluntary and involuntary\n context switches\n\no CPU displays user and system CPU usage times\n\no IPC displays counts for messages sent and received\n\no MEMORY is not currently implemented\n\no PAGE FAULTS displays counts for major and minor page faults\n\no SOURCE displays the names of functions from the source code, together\n with the name and line number of the file in which the function\n occurs\n\no SWAPS displays swap counts\n\nProfiling is enabled per session. When a session ends, its profiling\ninformation is lost.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-profile.html\n\n','mysql> SELECT @@profiling;\n+-------------+\n| @@profiling |\n+-------------+\n| 0 |\n+-------------+\n1 row in set (0.00 sec)\n\nmysql> SET profiling = 1;\nQuery OK, 0 rows affected (0.00 sec)\n\nmysql> DROP TABLE IF EXISTS t1;\nQuery OK, 0 rows affected, 1 warning (0.00 sec)\n\nmysql> CREATE TABLE T1 (id INT);\nQuery OK, 0 rows affected (0.01 sec)\n\nmysql> SHOW PROFILES;\n+----------+----------+--------------------------+\n| Query_ID | Duration | Query |\n+----------+----------+--------------------------+\n| 0 | 0.000088 | SET PROFILING = 1 |\n| 1 | 0.000136 | DROP TABLE IF EXISTS t1 |\n| 2 | 0.011947 | CREATE TABLE t1 (id INT) |\n+----------+----------+--------------------------+\n3 rows in set (0.00 sec)\n\nmysql> SHOW PROFILE;\n+----------------------+----------+\n| Status | Duration |\n+----------------------+----------+\n| checking permissions | 0.000040 |\n| creating table | 0.000056 |\n| After create | 0.011363 |\n| query end | 0.000375 |\n| freeing items | 0.000089 |\n| logging slow query | 0.000019 |\n| cleaning up | 0.000005 |\n+----------------------+----------+\n7 rows in set (0.00 sec)\n\nmysql> SHOW PROFILE FOR QUERY 1;\n+--------------------+----------+\n| Status | Duration |\n+--------------------+----------+\n| query end | 0.000107 |\n| freeing items | 0.000008 |\n| logging slow query | 0.000015 |\n| cleaning up | 0.000006 |\n+--------------------+----------+\n4 rows in set (0.00 sec)\n\nmysql> SHOW PROFILE CPU FOR QUERY 2;\n+----------------------+----------+----------+------------+\n| Status | Duration | CPU_user | CPU_system |\n+----------------------+----------+----------+------------+\n| checking permissions | 0.000040 | 0.000038 | 0.000002 |\n| creating table | 0.000056 | 0.000028 | 0.000028 |\n| After create | 0.011363 | 0.000217 | 0.001571 |\n| query end | 0.000375 | 0.000013 | 0.000028 |\n| freeing items | 0.000089 | 0.000010 | 0.000014 |\n| logging slow query | 0.000019 | 0.000009 | 0.000010 |\n| cleaning up | 0.000005 | 0.000003 | 0.000002 |\n+----------------------+----------+----------+------------+\n7 rows in set (0.00 sec)\n','http://dev.mysql.com/doc/refman/5.5/en/show-profile.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (488,26,'SHOW PROCEDURE CODE','Syntax:\nSHOW PROCEDURE CODE proc_name\n\nThis statement is a MySQL extension that is available only for servers\nthat have been built with debugging support. It displays a\nrepresentation of the internal implementation of the named stored\nprocedure. A similar statement, SHOW FUNCTION CODE, displays\ninformation about stored functions (see [HELP SHOW FUNCTION CODE]).\n\nBoth statements require that you be the owner of the routine or have\nSELECT access to the mysql.proc table.\n\nIf the named routine is available, each statement produces a result\nset. Each row in the result set corresponds to one "instruction" in the\nroutine. The first column is Pos, which is an ordinal number beginning\nwith 0. The second column is Instruction, which contains an SQL\nstatement (usually changed from the original source), or a directive\nwhich has meaning only to the stored-routine handler.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-procedure-code.html\n\n','mysql> DELIMITER //\nmysql> CREATE PROCEDURE p1 ()\n -> BEGIN\n -> DECLARE fanta INT DEFAULT 55;\n -> DROP TABLE t2;\n -> LOOP\n -> INSERT INTO t3 VALUES (fanta);\n -> END LOOP;\n -> END//\nQuery OK, 0 rows affected (0.00 sec)\n\nmysql> SHOW PROCEDURE CODE p1//\n+-----+----------------------------------------+\n| Pos | Instruction |\n+-----+----------------------------------------+\n| 0 | set fanta@0 55 |\n| 1 | stmt 9 "DROP TABLE t2" |\n| 2 | stmt 5 "INSERT INTO t3 VALUES (fanta)" |\n| 3 | jump 2 |\n+-----+----------------------------------------+\n4 rows in set (0.00 sec)\n','http://dev.mysql.com/doc/refman/5.5/en/show-procedure-code.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (489,22,'MEDIUMTEXT','MEDIUMTEXT [CHARACTER SET charset_name] [COLLATE collation_name]\n\nA TEXT column with a maximum length of 16,777,215 (224 - 1) characters.\nThe effective maximum length is less if the value contains multi-byte\ncharacters. Each MEDIUMTEXT value is stored using a 3-byte length\nprefix that indicates the number of bytes in the value.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/string-type-overview.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (490,4,'LN','Syntax:\nLN(X)\n\nReturns the natural logarithm of X; that is, the base-e logarithm of X.\nIf X is less than or equal to 0, then NULL is returned.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html\n\n','mysql> SELECT LN(2);\n -> 0.69314718055995\nmysql> SELECT LN(-2);\n -> NULL\n','http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (491,23,'RETURN','Syntax:\nRETURN expr\n\nThe RETURN statement terminates execution of a stored function and\nreturns the value expr to the function caller. There must be at least\none RETURN statement in a stored function. There may be more than one\nif the function has multiple exit points.\n\nThis statement is not used in stored procedures, triggers, or events.\nThe LEAVE statement can be used to exit a stored program of those\ntypes.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/return.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/return.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (492,26,'SHOW COLLATION','Syntax:\nSHOW COLLATION\n [LIKE \'pattern\' | WHERE expr]\n\nThis statement lists collations supported by the server. By default,\nthe output from SHOW COLLATION includes all available collations. The\nLIKE clause, if present, indicates which collation names to match. The\nWHERE clause can be given to select rows using more general conditions,\nas discussed in\nhttp://dev.mysql.com/doc/refman/5.5/en/extended-show.html. For example:\n\nmysql> SHOW COLLATION LIKE \'latin1%\';\n+-------------------+---------+----+---------+----------+---------+\n| Collation | Charset | Id | Default | Compiled | Sortlen |\n+-------------------+---------+----+---------+----------+---------+\n| latin1_german1_ci | latin1 | 5 | | | 0 |\n| latin1_swedish_ci | latin1 | 8 | Yes | Yes | 0 |\n| latin1_danish_ci | latin1 | 15 | | | 0 |\n| latin1_german2_ci | latin1 | 31 | | Yes | 2 |\n| latin1_bin | latin1 | 47 | | Yes | 0 |\n| latin1_general_ci | latin1 | 48 | | | 0 |\n| latin1_general_cs | latin1 | 49 | | | 0 |\n| latin1_spanish_ci | latin1 | 94 | | | 0 |\n+-------------------+---------+----+---------+----------+---------+\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/show-collation.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/show-collation.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (493,4,'LOG','Syntax:\nLOG(X), LOG(B,X)\n\nIf called with one parameter, this function returns the natural\nlogarithm of X. If X is less than or equal to 0, then NULL is returned.\n\nThe inverse of this function (when called with a single argument) is\nthe EXP() function.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html\n\n','mysql> SELECT LOG(2);\n -> 0.69314718055995\nmysql> SELECT LOG(-2);\n -> NULL\n','http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (494,8,'SET SQL_LOG_BIN','Syntax:\nSET sql_log_bin = {0|1}\n\nThe sql_log_bin variable controls whether logging to the binary log is\ndone. The default value is 1 (do logging). To change logging for the\ncurrent session, change the session value of this variable. The session\nuser must have the SUPER privilege to set this variable.\n\nBeginning with MySQL 5.5.5, it is no longer possible to set\n@@session.sql_log_bin within a transaction or subquery. (Bug #53437)\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/set-sql-log-bin.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/set-sql-log-bin.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (495,18,'!=','Syntax:\n<>, !=\n\nNot equal:\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html\n\n','mysql> SELECT \'.01\' <> \'0.01\';\n -> 1\nmysql> SELECT .01 <> \'0.01\';\n -> 0\nmysql> SELECT \'zapp\' <> \'zappp\';\n -> 1\n','http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (496,23,'WHILE','Syntax:\n[begin_label:] WHILE search_condition DO\n statement_list\nEND WHILE [end_label]\n\nThe statement list within a WHILE statement is repeated as long as the\nsearch_condition expression is true. statement_list consists of one or\nmore SQL statements, each terminated by a semicolon (;) statement\ndelimiter.\n\nA WHILE statement can be labeled. For the rules regarding label use,\nsee [HELP labels].\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/while.html\n\n','CREATE PROCEDURE dowhile()\nBEGIN\n DECLARE v1 INT DEFAULT 5;\n\n WHILE v1 > 0 DO\n ...\n SET v1 = v1 - 1;\n END WHILE;\nEND;\n','http://dev.mysql.com/doc/refman/5.5/en/while.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (497,12,'AES_DECRYPT','Syntax:\nAES_DECRYPT(crypt_str,key_str)\n\nThis function decrypts data using the official AES (Advanced Encryption\nStandard) algorithm. For more information, see the description of\nAES_ENCRYPT().\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/encryption-functions.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/encryption-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (498,31,'DAYNAME','Syntax:\nDAYNAME(date)\n\nReturns the name of the weekday for date. The language used for the\nname is controlled by the value of the lc_time_names system variable\n(http://dev.mysql.com/doc/refman/5.5/en/locale-support.html).\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html\n\n','mysql> SELECT DAYNAME(\'2007-02-03\');\n -> \'Saturday\'\n','http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (499,17,'COERCIBILITY','Syntax:\nCOERCIBILITY(str)\n\nReturns the collation coercibility value of the string argument.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/information-functions.html\n\n','mysql> SELECT COERCIBILITY(\'abc\' COLLATE latin1_swedish_ci);\n -> 0\nmysql> SELECT COERCIBILITY(USER());\n -> 3\nmysql> SELECT COERCIBILITY(\'abc\');\n -> 4\n','http://dev.mysql.com/doc/refman/5.5/en/information-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (500,22,'INT','INT[(M)] [UNSIGNED] [ZEROFILL]\n\nA normal-size integer. The signed range is -2147483648 to 2147483647.\nThe unsigned range is 0 to 4294967295.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/numeric-type-overview.html\n\n','','http://dev.mysql.com/doc/refman/5.5/en/numeric-type-overview.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (501,13,'GLENGTH','GLength(ls)\n\nReturns as a double-precision number the length of the LineString value\nls in its associated spatial reference.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#linestring-property-functions\n\n','mysql> SET @ls = \'LineString(1 1,2 2,3 3)\';\nmysql> SELECT GLength(GeomFromText(@ls));\n+----------------------------+\n| GLength(GeomFromText(@ls)) |\n+----------------------------+\n| 2.8284271247462 |\n+----------------------------+\n','http://dev.mysql.com/doc/refman/5.5/en/geometry-property-functions.html#linestring-property-functions'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (502,4,'RADIANS','Syntax:\nRADIANS(X)\n\nReturns the argument X, converted from degrees to radians. (Note that\nπ radians equals 180 degrees.)\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html\n\n','mysql> SELECT RADIANS(90);\n -> 1.5707963267949\n','http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (503,17,'COLLATION','Syntax:\nCOLLATION(str)\n\nReturns the collation of the string argument.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/information-functions.html\n\n','mysql> SELECT COLLATION(\'abc\');\n -> \'latin1_swedish_ci\'\nmysql> SELECT COLLATION(_utf8\'abc\');\n -> \'utf8_general_ci\'\n','http://dev.mysql.com/doc/refman/5.5/en/information-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (504,18,'COALESCE','Syntax:\nCOALESCE(value,...)\n\nReturns the first non-NULL value in the list, or NULL if there are no\nnon-NULL values.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html\n\n','mysql> SELECT COALESCE(NULL,1);\n -> 1\nmysql> SELECT COALESCE(NULL,NULL,NULL);\n -> NULL\n','http://dev.mysql.com/doc/refman/5.5/en/comparison-operators.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (505,17,'VERSION','Syntax:\nVERSION()\n\nReturns a string that indicates the MySQL server version. The string\nuses the utf8 character set. The value might have a suffix in addition\nto the version number. See the description of the version system\nvariable in\nhttp://dev.mysql.com/doc/refman/5.5/en/server-system-variables.html.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/information-functions.html\n\n','mysql> SELECT VERSION();\n -> \'5.5.29-standard\'\n','http://dev.mysql.com/doc/refman/5.5/en/information-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (506,37,'MAKE_SET','Syntax:\nMAKE_SET(bits,str1,str2,...)\n\nReturns a set value (a string containing substrings separated by ","\ncharacters) consisting of the strings that have the corresponding bit\nin bits set. str1 corresponds to bit 0, str2 to bit 1, and so on. NULL\nvalues in str1, str2, ... are not appended to the result.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','mysql> SELECT MAKE_SET(1,\'a\',\'b\',\'c\');\n -> \'a\'\nmysql> SELECT MAKE_SET(1 | 4,\'hello\',\'nice\',\'world\');\n -> \'hello,world\'\nmysql> SELECT MAKE_SET(1 | 4,\'hello\',\'nice\',NULL,\'world\');\n -> \'hello\'\nmysql> SELECT MAKE_SET(0,\'a\',\'b\',\'c\');\n -> \'\'\n','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); +insert into help_topic (help_topic_id,help_category_id,name,description,example,url) values (507,37,'FIND_IN_SET','Syntax:\nFIND_IN_SET(str,strlist)\n\nReturns a value in the range of 1 to N if the string str is in the\nstring list strlist consisting of N substrings. A string list is a\nstring composed of substrings separated by "," characters. If the first\nargument is a constant string and the second is a column of type SET,\nthe FIND_IN_SET() function is optimized to use bit arithmetic. Returns\n0 if str is not in strlist or if strlist is the empty string. Returns\nNULL if either argument is NULL. This function does not work properly\nif the first argument contains a comma (",") character.\n\nURL: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html\n\n','mysql> SELECT FIND_IN_SET(\'b\',\'a,b,c,d\');\n -> 2\n','http://dev.mysql.com/doc/refman/5.5/en/string-functions.html'); insert into help_keyword (help_keyword_id,name) values (0,'JOIN'); insert into help_keyword (help_keyword_id,name) values (1,'HOST'); @@ -596,1418 +603,1471 @@ insert into help_keyword (help_keyword_id,name) values (22,'DROP'); insert into help_keyword (help_keyword_id,name) values (23,'GEOMETRYCOLLECTIONFROMWKB'); insert into help_keyword (help_keyword_id,name) values (24,'EVENTS'); insert into help_keyword (help_keyword_id,name) values (25,'MONTH'); -insert into help_keyword (help_keyword_id,name) values (26,'INFO'); -insert into help_keyword (help_keyword_id,name) values (27,'PROFILES'); -insert into help_keyword (help_keyword_id,name) values (28,'DUPLICATE'); -insert into help_keyword (help_keyword_id,name) values (29,'REPLICATION'); -insert into help_keyword (help_keyword_id,name) values (30,'UNLOCK'); -insert into help_keyword (help_keyword_id,name) values (31,'INNODB'); -insert into help_keyword (help_keyword_id,name) values (32,'YEAR_MONTH'); -insert into help_keyword (help_keyword_id,name) values (33,'SUBJECT'); -insert into help_keyword (help_keyword_id,name) values (34,'PREPARE'); -insert into help_keyword (help_keyword_id,name) values (35,'LOCK'); -insert into help_keyword (help_keyword_id,name) values (36,'NDB'); -insert into help_keyword (help_keyword_id,name) values (37,'CHECK'); -insert into help_keyword (help_keyword_id,name) values (38,'FULL'); -insert into help_keyword (help_keyword_id,name) values (39,'INT4'); -insert into help_keyword (help_keyword_id,name) values (40,'BY'); -insert into help_keyword (help_keyword_id,name) values (41,'NO'); -insert into help_keyword (help_keyword_id,name) values (42,'MINUTE'); -insert into help_keyword (help_keyword_id,name) values (43,'PARTITION'); -insert into help_keyword (help_keyword_id,name) values (44,'DATA'); -insert into help_keyword (help_keyword_id,name) values (45,'DAY'); -insert into help_keyword (help_keyword_id,name) values (46,'SHARE'); -insert into help_keyword (help_keyword_id,name) values (47,'REAL'); -insert into help_keyword (help_keyword_id,name) values (48,'SEPARATOR'); +insert into help_keyword (help_keyword_id,name) values (26,'PROFILES'); +insert into help_keyword (help_keyword_id,name) values (27,'DUPLICATE'); +insert into help_keyword (help_keyword_id,name) values (28,'REPLICATION'); +insert into help_keyword (help_keyword_id,name) values (29,'UNLOCK'); +insert into help_keyword (help_keyword_id,name) values (30,'INNODB'); +insert into help_keyword (help_keyword_id,name) values (31,'YEAR_MONTH'); +insert into help_keyword (help_keyword_id,name) values (32,'SUBJECT'); +insert into help_keyword (help_keyword_id,name) values (33,'PREPARE'); +insert into help_keyword (help_keyword_id,name) values (34,'LOCK'); +insert into help_keyword (help_keyword_id,name) values (35,'NDB'); +insert into help_keyword (help_keyword_id,name) values (36,'CHECK'); +insert into help_keyword (help_keyword_id,name) values (37,'FULL'); +insert into help_keyword (help_keyword_id,name) values (38,'INT4'); +insert into help_keyword (help_keyword_id,name) values (39,'BY'); +insert into help_keyword (help_keyword_id,name) values (40,'NO'); +insert into help_keyword (help_keyword_id,name) values (41,'MINUTE'); +insert into help_keyword (help_keyword_id,name) values (42,'PARTITION'); +insert into help_keyword (help_keyword_id,name) values (43,'DATA'); +insert into help_keyword (help_keyword_id,name) values (44,'DAY'); +insert into help_keyword (help_keyword_id,name) values (45,'SHARE'); +insert into help_keyword (help_keyword_id,name) values (46,'REAL'); +insert into help_keyword (help_keyword_id,name) values (47,'SEPARATOR'); +insert into help_keyword (help_keyword_id,name) values (48,'MESSAGE_TEXT'); insert into help_keyword (help_keyword_id,name) values (49,'MASTER_HEARTBEAT_PERIOD'); insert into help_keyword (help_keyword_id,name) values (50,'DELETE'); insert into help_keyword (help_keyword_id,name) values (51,'ON'); -insert into help_keyword (help_keyword_id,name) values (52,'CONNECTION'); -insert into help_keyword (help_keyword_id,name) values (53,'CLOSE'); -insert into help_keyword (help_keyword_id,name) values (54,'X509'); -insert into help_keyword (help_keyword_id,name) values (55,'USE'); -insert into help_keyword (help_keyword_id,name) values (56,'WHERE'); -insert into help_keyword (help_keyword_id,name) values (57,'PRIVILEGES'); -insert into help_keyword (help_keyword_id,name) values (58,'SPATIAL'); -insert into help_keyword (help_keyword_id,name) values (59,'EVENT'); -insert into help_keyword (help_keyword_id,name) values (60,'SUPER'); -insert into help_keyword (help_keyword_id,name) values (61,'SQL_BUFFER_RESULT'); -insert into help_keyword (help_keyword_id,name) values (62,'IGNORE'); -insert into help_keyword (help_keyword_id,name) values (63,'QUICK'); -insert into help_keyword (help_keyword_id,name) values (64,'SIGNED'); -insert into help_keyword (help_keyword_id,name) values (65,'OFFLINE'); -insert into help_keyword (help_keyword_id,name) values (66,'SECURITY'); -insert into help_keyword (help_keyword_id,name) values (67,'AUTOEXTEND_SIZE'); -insert into help_keyword (help_keyword_id,name) values (68,'NDBCLUSTER'); -insert into help_keyword (help_keyword_id,name) values (69,'POLYGONFROMWKB'); -insert into help_keyword (help_keyword_id,name) values (70,'FALSE'); -insert into help_keyword (help_keyword_id,name) values (71,'LEVEL'); -insert into help_keyword (help_keyword_id,name) values (72,'FORCE'); -insert into help_keyword (help_keyword_id,name) values (73,'BINARY'); -insert into help_keyword (help_keyword_id,name) values (74,'TO'); -insert into help_keyword (help_keyword_id,name) values (75,'CHANGE'); -insert into help_keyword (help_keyword_id,name) values (76,'CURRENT_USER'); -insert into help_keyword (help_keyword_id,name) values (77,'HOUR_MINUTE'); -insert into help_keyword (help_keyword_id,name) values (78,'UPDATE'); -insert into help_keyword (help_keyword_id,name) values (79,'PRESERVE'); -insert into help_keyword (help_keyword_id,name) values (80,'INTO'); -insert into help_keyword (help_keyword_id,name) values (81,'FEDERATED'); -insert into help_keyword (help_keyword_id,name) values (82,'VARYING'); -insert into help_keyword (help_keyword_id,name) values (83,'MAX_SIZE'); -insert into help_keyword (help_keyword_id,name) values (84,'HOUR_SECOND'); -insert into help_keyword (help_keyword_id,name) values (85,'VARIABLE'); -insert into help_keyword (help_keyword_id,name) values (86,'ROLLBACK'); -insert into help_keyword (help_keyword_id,name) values (87,'RTREE'); -insert into help_keyword (help_keyword_id,name) values (88,'PROCEDURE'); -insert into help_keyword (help_keyword_id,name) values (89,'TIMESTAMP'); -insert into help_keyword (help_keyword_id,name) values (90,'IMPORT'); -insert into help_keyword (help_keyword_id,name) values (91,'AGAINST'); -insert into help_keyword (help_keyword_id,name) values (92,'CHECKSUM'); -insert into help_keyword (help_keyword_id,name) values (93,'COUNT'); -insert into help_keyword (help_keyword_id,name) values (94,'LONGBINARY'); -insert into help_keyword (help_keyword_id,name) values (95,'THEN'); -insert into help_keyword (help_keyword_id,name) values (96,'INSERT'); -insert into help_keyword (help_keyword_id,name) values (97,'ENGINES'); -insert into help_keyword (help_keyword_id,name) values (98,'HANDLER'); -insert into help_keyword (help_keyword_id,name) values (99,'PORT'); -insert into help_keyword (help_keyword_id,name) values (100,'DAY_SECOND'); -insert into help_keyword (help_keyword_id,name) values (101,'EXISTS'); -insert into help_keyword (help_keyword_id,name) values (102,'MUTEX'); -insert into help_keyword (help_keyword_id,name) values (103,'RELEASE'); -insert into help_keyword (help_keyword_id,name) values (104,'BOOLEAN'); -insert into help_keyword (help_keyword_id,name) values (105,'MOD'); -insert into help_keyword (help_keyword_id,name) values (106,'DEFAULT'); -insert into help_keyword (help_keyword_id,name) values (107,'TYPE'); -insert into help_keyword (help_keyword_id,name) values (108,'NO_WRITE_TO_BINLOG'); -insert into help_keyword (help_keyword_id,name) values (109,'OPTIMIZE'); -insert into help_keyword (help_keyword_id,name) values (110,'RESET'); -insert into help_keyword (help_keyword_id,name) values (111,'ITERATE'); -insert into help_keyword (help_keyword_id,name) values (112,'INSTALL'); -insert into help_keyword (help_keyword_id,name) values (113,'DO'); -insert into help_keyword (help_keyword_id,name) values (114,'BIGINT'); -insert into help_keyword (help_keyword_id,name) values (115,'SET'); -insert into help_keyword (help_keyword_id,name) values (116,'ISSUER'); -insert into help_keyword (help_keyword_id,name) values (117,'DATE'); -insert into help_keyword (help_keyword_id,name) values (118,'STATUS'); -insert into help_keyword (help_keyword_id,name) values (119,'FULLTEXT'); -insert into help_keyword (help_keyword_id,name) values (120,'COMMENT'); -insert into help_keyword (help_keyword_id,name) values (121,'MASTER_CONNECT_RETRY'); -insert into help_keyword (help_keyword_id,name) values (122,'INNER'); -insert into help_keyword (help_keyword_id,name) values (123,'STOP'); -insert into help_keyword (help_keyword_id,name) values (124,'MASTER_LOG_FILE'); -insert into help_keyword (help_keyword_id,name) values (125,'MRG_MYISAM'); -insert into help_keyword (help_keyword_id,name) values (126,'PRECISION'); -insert into help_keyword (help_keyword_id,name) values (127,'REQUIRE'); -insert into help_keyword (help_keyword_id,name) values (128,'TRAILING'); -insert into help_keyword (help_keyword_id,name) values (129,'PARTITIONS'); -insert into help_keyword (help_keyword_id,name) values (130,'LONG'); -insert into help_keyword (help_keyword_id,name) values (131,'OPTION'); -insert into help_keyword (help_keyword_id,name) values (132,'REORGANIZE'); -insert into help_keyword (help_keyword_id,name) values (133,'ELSE'); -insert into help_keyword (help_keyword_id,name) values (134,'DEALLOCATE'); -insert into help_keyword (help_keyword_id,name) values (135,'IO_THREAD'); -insert into help_keyword (help_keyword_id,name) values (136,'CASE'); -insert into help_keyword (help_keyword_id,name) values (137,'CIPHER'); -insert into help_keyword (help_keyword_id,name) values (138,'CONTINUE'); -insert into help_keyword (help_keyword_id,name) values (139,'FROM'); -insert into help_keyword (help_keyword_id,name) values (140,'READ'); -insert into help_keyword (help_keyword_id,name) values (141,'LEFT'); -insert into help_keyword (help_keyword_id,name) values (142,'ELSEIF'); -insert into help_keyword (help_keyword_id,name) values (143,'MINUTE_SECOND'); -insert into help_keyword (help_keyword_id,name) values (144,'COMPACT'); -insert into help_keyword (help_keyword_id,name) values (145,'RESTORE'); -insert into help_keyword (help_keyword_id,name) values (146,'DEC'); -insert into help_keyword (help_keyword_id,name) values (147,'FOR'); -insert into help_keyword (help_keyword_id,name) values (148,'WARNINGS'); -insert into help_keyword (help_keyword_id,name) values (149,'MIN_ROWS'); -insert into help_keyword (help_keyword_id,name) values (150,'CONDITION'); -insert into help_keyword (help_keyword_id,name) values (151,'STRING'); -insert into help_keyword (help_keyword_id,name) values (152,'ENCLOSED'); -insert into help_keyword (help_keyword_id,name) values (153,'FUNCTION'); -insert into help_keyword (help_keyword_id,name) values (154,'AGGREGATE'); -insert into help_keyword (help_keyword_id,name) values (155,'FIELDS'); -insert into help_keyword (help_keyword_id,name) values (156,'INT3'); -insert into help_keyword (help_keyword_id,name) values (157,'ARCHIVE'); -insert into help_keyword (help_keyword_id,name) values (158,'AVG_ROW_LENGTH'); -insert into help_keyword (help_keyword_id,name) values (159,'ADD'); -insert into help_keyword (help_keyword_id,name) values (160,'KILL'); -insert into help_keyword (help_keyword_id,name) values (161,'FLOAT4'); -insert into help_keyword (help_keyword_id,name) values (162,'TABLESPACE'); -insert into help_keyword (help_keyword_id,name) values (163,'VIEW'); -insert into help_keyword (help_keyword_id,name) values (164,'REPEATABLE'); -insert into help_keyword (help_keyword_id,name) values (165,'INFILE'); -insert into help_keyword (help_keyword_id,name) values (166,'ORDER'); -insert into help_keyword (help_keyword_id,name) values (167,'USING'); -insert into help_keyword (help_keyword_id,name) values (168,'MIDDLEINT'); -insert into help_keyword (help_keyword_id,name) values (169,'GRANT'); -insert into help_keyword (help_keyword_id,name) values (170,'UNSIGNED'); -insert into help_keyword (help_keyword_id,name) values (171,'DECIMAL'); -insert into help_keyword (help_keyword_id,name) values (172,'GEOMETRYFROMTEXT'); -insert into help_keyword (help_keyword_id,name) values (173,'INDEXES'); -insert into help_keyword (help_keyword_id,name) values (174,'FOREIGN'); -insert into help_keyword (help_keyword_id,name) values (175,'CACHE'); -insert into help_keyword (help_keyword_id,name) values (176,'HOSTS'); -insert into help_keyword (help_keyword_id,name) values (177,'COMMIT'); -insert into help_keyword (help_keyword_id,name) values (178,'SCHEMAS'); -insert into help_keyword (help_keyword_id,name) values (179,'LEADING'); -insert into help_keyword (help_keyword_id,name) values (180,'SNAPSHOT'); -insert into help_keyword (help_keyword_id,name) values (181,'DECLARE'); -insert into help_keyword (help_keyword_id,name) values (182,'LOAD'); -insert into help_keyword (help_keyword_id,name) values (183,'SQL_CACHE'); -insert into help_keyword (help_keyword_id,name) values (184,'CONVERT'); -insert into help_keyword (help_keyword_id,name) values (185,'DYNAMIC'); -insert into help_keyword (help_keyword_id,name) values (186,'COLLATE'); -insert into help_keyword (help_keyword_id,name) values (187,'POLYGONFROMTEXT'); -insert into help_keyword (help_keyword_id,name) values (188,'BYTE'); -insert into help_keyword (help_keyword_id,name) values (189,'GLOBAL'); -insert into help_keyword (help_keyword_id,name) values (190,'LINESTRINGFROMWKB'); -insert into help_keyword (help_keyword_id,name) values (191,'WHEN'); -insert into help_keyword (help_keyword_id,name) values (192,'COLUMN_FORMAT'); -insert into help_keyword (help_keyword_id,name) values (193,'HAVING'); -insert into help_keyword (help_keyword_id,name) values (194,'AS'); -insert into help_keyword (help_keyword_id,name) values (195,'STARTING'); -insert into help_keyword (help_keyword_id,name) values (196,'RELOAD'); -insert into help_keyword (help_keyword_id,name) values (197,'AUTOCOMMIT'); -insert into help_keyword (help_keyword_id,name) values (198,'REVOKE'); -insert into help_keyword (help_keyword_id,name) values (199,'GRANTS'); -insert into help_keyword (help_keyword_id,name) values (200,'OUTER'); -insert into help_keyword (help_keyword_id,name) values (201,'FLOOR'); -insert into help_keyword (help_keyword_id,name) values (202,'EXPLAIN'); -insert into help_keyword (help_keyword_id,name) values (203,'WITH'); -insert into help_keyword (help_keyword_id,name) values (204,'AFTER'); -insert into help_keyword (help_keyword_id,name) values (205,'STD'); -insert into help_keyword (help_keyword_id,name) values (206,'CSV'); -insert into help_keyword (help_keyword_id,name) values (207,'DISABLE'); -insert into help_keyword (help_keyword_id,name) values (208,'UNINSTALL'); -insert into help_keyword (help_keyword_id,name) values (209,'OUTFILE'); -insert into help_keyword (help_keyword_id,name) values (210,'LOW_PRIORITY'); -insert into help_keyword (help_keyword_id,name) values (211,'FILE'); -insert into help_keyword (help_keyword_id,name) values (212,'NODEGROUP'); -insert into help_keyword (help_keyword_id,name) values (213,'SCHEMA'); -insert into help_keyword (help_keyword_id,name) values (214,'SONAME'); -insert into help_keyword (help_keyword_id,name) values (215,'POW'); -insert into help_keyword (help_keyword_id,name) values (216,'DUAL'); -insert into help_keyword (help_keyword_id,name) values (217,'MULTIPOINTFROMWKB'); -insert into help_keyword (help_keyword_id,name) values (218,'INDEX'); 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+insert into help_keyword (help_keyword_id,name) values (73,'FALSE'); +insert into help_keyword (help_keyword_id,name) values (74,'LEVEL'); +insert into help_keyword (help_keyword_id,name) values (75,'FORCE'); +insert into help_keyword (help_keyword_id,name) values (76,'BINARY'); +insert into help_keyword (help_keyword_id,name) values (77,'TO'); +insert into help_keyword (help_keyword_id,name) values (78,'CHANGE'); +insert into help_keyword (help_keyword_id,name) values (79,'CURRENT_USER'); +insert into help_keyword (help_keyword_id,name) values (80,'HOUR_MINUTE'); +insert into help_keyword (help_keyword_id,name) values (81,'UPDATE'); +insert into help_keyword (help_keyword_id,name) values (82,'PRESERVE'); +insert into help_keyword (help_keyword_id,name) values (83,'TABLE_NAME'); +insert into help_keyword (help_keyword_id,name) values (84,'INTO'); +insert into help_keyword (help_keyword_id,name) values (85,'FEDERATED'); +insert into help_keyword (help_keyword_id,name) values (86,'VARYING'); 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+insert into help_relation (help_topic_id,help_keyword_id) values (463,416); +insert into help_relation (help_topic_id,help_keyword_id) values (468,417); +insert into help_relation (help_topic_id,help_keyword_id) values (232,418); +insert into help_relation (help_topic_id,help_keyword_id) values (356,419); +insert into help_relation (help_topic_id,help_keyword_id) values (3,420); +insert into help_relation (help_topic_id,help_keyword_id) values (104,420); +insert into help_relation (help_topic_id,help_keyword_id) values (486,420); +insert into help_relation (help_topic_id,help_keyword_id) values (459,421); +insert into help_relation (help_topic_id,help_keyword_id) values (374,421); +insert into help_relation (help_topic_id,help_keyword_id) values (470,422); +insert into help_relation (help_topic_id,help_keyword_id) values (463,422); +insert into help_relation (help_topic_id,help_keyword_id) values (468,423); +insert into help_relation (help_topic_id,help_keyword_id) values (463,423); +insert into help_relation (help_topic_id,help_keyword_id) values (468,424); 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+insert into help_relation (help_topic_id,help_keyword_id) values (309,429); +insert into help_relation (help_topic_id,help_keyword_id) values (186,429); +insert into help_relation (help_topic_id,help_keyword_id) values (212,429); +insert into help_relation (help_topic_id,help_keyword_id) values (84,430); +insert into help_relation (help_topic_id,help_keyword_id) values (472,430); +insert into help_relation (help_topic_id,help_keyword_id) values (368,430); +insert into help_relation (help_topic_id,help_keyword_id) values (483,431); +insert into help_relation (help_topic_id,help_keyword_id) values (466,432); +insert into help_relation (help_topic_id,help_keyword_id) values (421,433); +insert into help_relation (help_topic_id,help_keyword_id) values (145,434); +insert into help_relation (help_topic_id,help_keyword_id) values (38,434); +insert into help_relation (help_topic_id,help_keyword_id) values (406,434); +insert into help_relation (help_topic_id,help_keyword_id) values (89,434); +insert into help_relation (help_topic_id,help_keyword_id) values (223,434); 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+insert into help_relation (help_topic_id,help_keyword_id) values (466,443); +insert into help_relation (help_topic_id,help_keyword_id) values (326,443); +insert into help_relation (help_topic_id,help_keyword_id) values (36,443); +insert into help_relation (help_topic_id,help_keyword_id) values (130,443); +insert into help_relation (help_topic_id,help_keyword_id) values (115,443); +insert into help_relation (help_topic_id,help_keyword_id) values (421,443); +insert into help_relation (help_topic_id,help_keyword_id) values (470,443); +insert into help_relation (help_topic_id,help_keyword_id) values (0,444); +insert into help_relation (help_topic_id,help_keyword_id) values (96,444); +insert into help_relation (help_topic_id,help_keyword_id) values (384,444); +insert into help_relation (help_topic_id,help_keyword_id) values (288,444); +insert into help_relation (help_topic_id,help_keyword_id) values (433,444); +insert into help_relation (help_topic_id,help_keyword_id) values (305,444); +insert into help_relation (help_topic_id,help_keyword_id) values (356,444); +insert into help_relation (help_topic_id,help_keyword_id) values (361,444); +insert into help_relation (help_topic_id,help_keyword_id) values (497,445); +insert into help_relation (help_topic_id,help_keyword_id) values (185,446); +insert into help_relation (help_topic_id,help_keyword_id) values (199,447); +insert into help_relation (help_topic_id,help_keyword_id) values (134,448); +insert into help_relation (help_topic_id,help_keyword_id) values (347,448); +insert into help_relation (help_topic_id,help_keyword_id) values (294,448); +insert into help_relation (help_topic_id,help_keyword_id) values (36,448); +insert into help_relation (help_topic_id,help_keyword_id) values (495,449); +insert into help_relation (help_topic_id,help_keyword_id) values (27,450); +insert into help_relation (help_topic_id,help_keyword_id) values (347,451); +insert into help_relation (help_topic_id,help_keyword_id) values (22,451); +insert into help_relation (help_topic_id,help_keyword_id) values (263,451); +insert into help_relation (help_topic_id,help_keyword_id) values (347,452); +insert into help_relation (help_topic_id,help_keyword_id) values (492,452); +insert into help_relation (help_topic_id,help_keyword_id) values (199,453); +insert into help_relation (help_topic_id,help_keyword_id) values (356,454); +insert into help_relation (help_topic_id,help_keyword_id) values (104,454); +insert into help_relation (help_topic_id,help_keyword_id) values (210,455); +insert into help_relation (help_topic_id,help_keyword_id) values (468,456); +insert into help_relation (help_topic_id,help_keyword_id) values (106,456); +insert into help_relation (help_topic_id,help_keyword_id) values (463,456); +insert into help_relation (help_topic_id,help_keyword_id) values (463,457); +insert into help_relation (help_topic_id,help_keyword_id) values (194,458); +insert into help_relation (help_topic_id,help_keyword_id) values (478,458); +insert into help_relation (help_topic_id,help_keyword_id) values (459,459); +insert into help_relation (help_topic_id,help_keyword_id) values (374,459); +insert into help_relation (help_topic_id,help_keyword_id) values (39,460); +insert into help_relation (help_topic_id,help_keyword_id) values (58,460); +insert into help_relation (help_topic_id,help_keyword_id) values (269,460); +insert into help_relation (help_topic_id,help_keyword_id) values (185,460); +insert into help_relation (help_topic_id,help_keyword_id) values (264,460); +insert into help_relation (help_topic_id,help_keyword_id) values (209,461); +insert into help_relation (help_topic_id,help_keyword_id) values (468,461); +insert into help_relation (help_topic_id,help_keyword_id) values (201,462); +insert into help_relation (help_topic_id,help_keyword_id) values (468,463); + From 2d99ea454fa684dc2aeeecd1a978728482bf34b3 Mon Sep 17 00:00:00 2001 From: Sergey Petrunya Date: Tue, 28 Aug 2012 15:15:05 +0400 Subject: [PATCH 134/164] MDEV-430: Server crashes in select_describe on EXPLAIN with materialization+semijoin, etc - Don't do early cleanup of uncorrelated subqueries if we're running an EXPLAIN. --- mysql-test/r/subselect.result | 18 ++++++++++++++++-- mysql-test/r/subselect_no_mat.result | 18 ++++++++++++++++-- mysql-test/r/subselect_no_opts.result | 18 ++++++++++++++++-- mysql-test/r/subselect_no_scache.result | 18 ++++++++++++++++-- mysql-test/r/subselect_no_semijoin.result | 18 ++++++++++++++++-- mysql-test/t/subselect.test | 14 ++++++++++++++ sql/sql_select.cc | 2 +- 7 files changed, 95 insertions(+), 11 deletions(-) diff --git a/mysql-test/r/subselect.result b/mysql-test/r/subselect.result index 8c71c09c1ac..73af2119ddd 100644 --- a/mysql-test/r/subselect.result +++ b/mysql-test/r/subselect.result @@ -5966,7 +5966,7 @@ id select_type table type possible_keys key key_len ref rows Extra EXPLAIN SELECT * FROM t1 WHERE EXISTS (SELECT * FROM t1 WHERE a=7); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 4 -2 SUBQUERY t1 ref a a 5 const 1 +2 SUBQUERY t1 ref a a 5 const 1 Using index DROP TABLE t1; # # BUG#12616253 - WRONG RESULT WITH EXISTS(SUBQUERY) (MISSING ROWS) @@ -6127,7 +6127,7 @@ set optimizer_switch=@tmp_optimizer_switch; EXPLAIN SELECT * FROM t1 WHERE EXISTS (SELECT * FROM t1 WHERE a=7); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 4 -2 SUBQUERY t1 ref a a 5 const 1 +2 SUBQUERY t1 ref a a 5 const 1 Using index DROP TABLE t1; # @@ -6806,5 +6806,19 @@ Table_schema Table_name Index_name Rows_read test t2 b 1 set global userstat=@tmp_mdev410; DROP TABLE t1,t2,t3,t4; +# +# MDEV-430: Server crashes in select_describe on EXPLAIN with +# materialization+semijoin, 2 nested subqueries, aggregate functions +# +CREATE TABLE t1 (a INT, KEY(a)); +INSERT INTO t1 VALUES (1),(8); +CREATE TABLE t2 (b INT, KEY(b)); +INSERT INTO t2 VALUES (45),(17),(20); +EXPLAIN SELECT * FROM t1 WHERE EXISTS ( SELECT a FROM t1, t2 WHERE b = a GROUP BY a HAVING a <> 1 ) ; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +2 SUBQUERY t1 index a a 5 NULL 1 Using where; Using index +2 SUBQUERY t2 ref b b 5 test.t1.a 2 Using index +DROP TABLE t1,t2; # return optimizer switch changed in the beginning of this test set optimizer_switch=@subselect_tmp; diff --git a/mysql-test/r/subselect_no_mat.result b/mysql-test/r/subselect_no_mat.result index 48ab96dcaaa..f8d41890c7b 100644 --- a/mysql-test/r/subselect_no_mat.result +++ b/mysql-test/r/subselect_no_mat.result @@ -5967,7 +5967,7 @@ id select_type table type possible_keys key key_len ref rows Extra EXPLAIN SELECT * FROM t1 WHERE EXISTS (SELECT * FROM t1 WHERE a=7); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 4 -2 SUBQUERY t1 ref a a 5 const 1 +2 SUBQUERY t1 ref a a 5 const 1 Using index DROP TABLE t1; # # BUG#12616253 - WRONG RESULT WITH EXISTS(SUBQUERY) (MISSING ROWS) @@ -6126,7 +6126,7 @@ set optimizer_switch=@tmp_optimizer_switch; EXPLAIN SELECT * FROM t1 WHERE EXISTS (SELECT * FROM t1 WHERE a=7); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 4 -2 SUBQUERY t1 ref a a 5 const 1 +2 SUBQUERY t1 ref a a 5 const 1 Using index DROP TABLE t1; # @@ -6804,6 +6804,20 @@ Table_schema Table_name Index_name Rows_read test t2 b 1 set global userstat=@tmp_mdev410; DROP TABLE t1,t2,t3,t4; +# +# MDEV-430: Server crashes in select_describe on EXPLAIN with +# materialization+semijoin, 2 nested subqueries, aggregate functions +# +CREATE TABLE t1 (a INT, KEY(a)); +INSERT INTO t1 VALUES (1),(8); +CREATE TABLE t2 (b INT, KEY(b)); +INSERT INTO t2 VALUES (45),(17),(20); +EXPLAIN SELECT * FROM t1 WHERE EXISTS ( SELECT a FROM t1, t2 WHERE b = a GROUP BY a HAVING a <> 1 ) ; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +2 SUBQUERY t1 index a a 5 NULL 1 Using where; Using index +2 SUBQUERY t2 ref b b 5 test.t1.a 2 Using index +DROP TABLE t1,t2; # return optimizer switch changed in the beginning of this test set optimizer_switch=@subselect_tmp; set optimizer_switch=default; diff --git a/mysql-test/r/subselect_no_opts.result b/mysql-test/r/subselect_no_opts.result index 9ab4e23b091..e65a5485caf 100644 --- a/mysql-test/r/subselect_no_opts.result +++ b/mysql-test/r/subselect_no_opts.result @@ -5963,7 +5963,7 @@ id select_type table type possible_keys key key_len ref rows Extra EXPLAIN SELECT * FROM t1 WHERE EXISTS (SELECT * FROM t1 WHERE a=7); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 4 -2 SUBQUERY t1 ref a a 5 const 1 +2 SUBQUERY t1 ref a a 5 const 1 Using index DROP TABLE t1; # # BUG#12616253 - WRONG RESULT WITH EXISTS(SUBQUERY) (MISSING ROWS) @@ -6122,7 +6122,7 @@ set optimizer_switch=@tmp_optimizer_switch; EXPLAIN SELECT * FROM t1 WHERE EXISTS (SELECT * FROM t1 WHERE a=7); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 4 -2 SUBQUERY t1 ref a a 5 const 1 +2 SUBQUERY t1 ref a a 5 const 1 Using index DROP TABLE t1; # @@ -6801,6 +6801,20 @@ Table_schema Table_name Index_name Rows_read test t2 b 1 set global userstat=@tmp_mdev410; DROP TABLE t1,t2,t3,t4; +# +# MDEV-430: Server crashes in select_describe on EXPLAIN with +# materialization+semijoin, 2 nested subqueries, aggregate functions +# +CREATE TABLE t1 (a INT, KEY(a)); +INSERT INTO t1 VALUES (1),(8); +CREATE TABLE t2 (b INT, KEY(b)); +INSERT INTO t2 VALUES (45),(17),(20); +EXPLAIN SELECT * FROM t1 WHERE EXISTS ( SELECT a FROM t1, t2 WHERE b = a GROUP BY a HAVING a <> 1 ) ; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +2 SUBQUERY t1 index a a 5 NULL 1 Using where; Using index +2 SUBQUERY t2 ref b b 5 test.t1.a 2 Using index +DROP TABLE t1,t2; # return optimizer switch changed in the beginning of this test set optimizer_switch=@subselect_tmp; set @optimizer_switch_for_subselect_test=null; diff --git a/mysql-test/r/subselect_no_scache.result b/mysql-test/r/subselect_no_scache.result index d47aa956ead..bee41745efd 100644 --- a/mysql-test/r/subselect_no_scache.result +++ b/mysql-test/r/subselect_no_scache.result @@ -5972,7 +5972,7 @@ id select_type table type possible_keys key key_len ref rows Extra EXPLAIN SELECT * FROM t1 WHERE EXISTS (SELECT * FROM t1 WHERE a=7); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 4 -2 SUBQUERY t1 ref a a 5 const 1 +2 SUBQUERY t1 ref a a 5 const 1 Using index DROP TABLE t1; # # BUG#12616253 - WRONG RESULT WITH EXISTS(SUBQUERY) (MISSING ROWS) @@ -6133,7 +6133,7 @@ set optimizer_switch=@tmp_optimizer_switch; EXPLAIN SELECT * FROM t1 WHERE EXISTS (SELECT * FROM t1 WHERE a=7); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 4 -2 SUBQUERY t1 ref a a 5 const 1 +2 SUBQUERY t1 ref a a 5 const 1 Using index DROP TABLE t1; # @@ -6812,6 +6812,20 @@ Table_schema Table_name Index_name Rows_read test t2 b 1 set global userstat=@tmp_mdev410; DROP TABLE t1,t2,t3,t4; +# +# MDEV-430: Server crashes in select_describe on EXPLAIN with +# materialization+semijoin, 2 nested subqueries, aggregate functions +# +CREATE TABLE t1 (a INT, KEY(a)); +INSERT INTO t1 VALUES (1),(8); +CREATE TABLE t2 (b INT, KEY(b)); +INSERT INTO t2 VALUES (45),(17),(20); +EXPLAIN SELECT * FROM t1 WHERE EXISTS ( SELECT a FROM t1, t2 WHERE b = a GROUP BY a HAVING a <> 1 ) ; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +2 SUBQUERY t1 index a a 5 NULL 1 Using where; Using index +2 SUBQUERY t2 ref b b 5 test.t1.a 2 Using index +DROP TABLE t1,t2; # return optimizer switch changed in the beginning of this test set optimizer_switch=@subselect_tmp; set optimizer_switch=default; diff --git a/mysql-test/r/subselect_no_semijoin.result b/mysql-test/r/subselect_no_semijoin.result index 96e6c2182fa..886e6882a6f 100644 --- a/mysql-test/r/subselect_no_semijoin.result +++ b/mysql-test/r/subselect_no_semijoin.result @@ -5963,7 +5963,7 @@ id select_type table type possible_keys key key_len ref rows Extra EXPLAIN SELECT * FROM t1 WHERE EXISTS (SELECT * FROM t1 WHERE a=7); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 4 -2 SUBQUERY t1 ref a a 5 const 1 +2 SUBQUERY t1 ref a a 5 const 1 Using index DROP TABLE t1; # # BUG#12616253 - WRONG RESULT WITH EXISTS(SUBQUERY) (MISSING ROWS) @@ -6122,7 +6122,7 @@ set optimizer_switch=@tmp_optimizer_switch; EXPLAIN SELECT * FROM t1 WHERE EXISTS (SELECT * FROM t1 WHERE a=7); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 4 -2 SUBQUERY t1 ref a a 5 const 1 +2 SUBQUERY t1 ref a a 5 const 1 Using index DROP TABLE t1; # @@ -6801,6 +6801,20 @@ Table_schema Table_name Index_name Rows_read test t2 b 1 set global userstat=@tmp_mdev410; DROP TABLE t1,t2,t3,t4; +# +# MDEV-430: Server crashes in select_describe on EXPLAIN with +# materialization+semijoin, 2 nested subqueries, aggregate functions +# +CREATE TABLE t1 (a INT, KEY(a)); +INSERT INTO t1 VALUES (1),(8); +CREATE TABLE t2 (b INT, KEY(b)); +INSERT INTO t2 VALUES (45),(17),(20); +EXPLAIN SELECT * FROM t1 WHERE EXISTS ( SELECT a FROM t1, t2 WHERE b = a GROUP BY a HAVING a <> 1 ) ; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +2 SUBQUERY t1 index a a 5 NULL 1 Using where; Using index +2 SUBQUERY t2 ref b b 5 test.t1.a 2 Using index +DROP TABLE t1,t2; # return optimizer switch changed in the beginning of this test set optimizer_switch=@subselect_tmp; set @optimizer_switch_for_subselect_test=null; diff --git a/mysql-test/t/subselect.test b/mysql-test/t/subselect.test index 786e328aa72..62ca1f70cfc 100644 --- a/mysql-test/t/subselect.test +++ b/mysql-test/t/subselect.test @@ -5721,5 +5721,19 @@ set global userstat=@tmp_mdev410; DROP TABLE t1,t2,t3,t4; +--echo # +--echo # MDEV-430: Server crashes in select_describe on EXPLAIN with +--echo # materialization+semijoin, 2 nested subqueries, aggregate functions +--echo # +CREATE TABLE t1 (a INT, KEY(a)); +INSERT INTO t1 VALUES (1),(8); + +CREATE TABLE t2 (b INT, KEY(b)); +INSERT INTO t2 VALUES (45),(17),(20); + +EXPLAIN SELECT * FROM t1 WHERE EXISTS ( SELECT a FROM t1, t2 WHERE b = a GROUP BY a HAVING a <> 1 ) ; + +DROP TABLE t1,t2; + --echo # return optimizer switch changed in the beginning of this test set optimizer_switch=@subselect_tmp; diff --git a/sql/sql_select.cc b/sql/sql_select.cc index dc09488632c..c60d234383b 100644 --- a/sql/sql_select.cc +++ b/sql/sql_select.cc @@ -10543,7 +10543,7 @@ void JOIN::join_free() Optimization: if not EXPLAIN and we are done with the JOIN, free all tables. */ - bool full= !(select_lex->uncacheable); + bool full= !(select_lex->uncacheable) && !(thd->lex->describe); bool can_unlock= full; DBUG_ENTER("JOIN::join_free"); From 97bd8d89098897ffc33a063c8ab8a31ee5ef412e Mon Sep 17 00:00:00 2001 From: Sergey Petrunya Date: Tue, 28 Aug 2012 15:40:38 +0400 Subject: [PATCH 135/164] MDEV-405: Server crashes in test_if_skip_sort_order on EXPLAIN with GROUP BY and HAVING in EXISTS subquery - Testcase --- mysql-test/r/subselect.result | 13 +++++++++++++ mysql-test/r/subselect_no_mat.result | 13 +++++++++++++ mysql-test/r/subselect_no_opts.result | 13 +++++++++++++ mysql-test/r/subselect_no_scache.result | 13 +++++++++++++ mysql-test/r/subselect_no_semijoin.result | 13 +++++++++++++ mysql-test/t/subselect.test | 13 +++++++++++++ 6 files changed, 78 insertions(+) diff --git a/mysql-test/r/subselect.result b/mysql-test/r/subselect.result index 510555d2e50..f775336299b 100644 --- a/mysql-test/r/subselect.result +++ b/mysql-test/r/subselect.result @@ -6846,3 +6846,16 @@ id select_type table type possible_keys key key_len ref rows Extra 2 SUBQUERY t1 index a a 5 NULL 1 Using where; Using index 2 SUBQUERY t2 ref b b 5 test.t1.a 2 Using index DROP TABLE t1,t2; +# +# MDEV-405: Server crashes in test_if_skip_sort_order on EXPLAIN with GROUP BY and HAVING in EXISTS subquery +# +CREATE TABLE t1 (a INT, KEY(a)); +INSERT INTO t1 VALUES (1),(8); +CREATE TABLE t2 (b INT, KEY(b)); +INSERT INTO t2 VALUES (45),(17),(20); +EXPLAIN SELECT * FROM t1 WHERE EXISTS ( SELECT a FROM t1, t2 WHERE b = a GROUP BY a HAVING a <> 1 ) ; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +2 SUBQUERY t1 index a a 5 NULL 1 Using where; Using index +2 SUBQUERY t2 ref b b 5 test.t1.a 2 Using index +DROP TABLE t1,t2; diff --git a/mysql-test/r/subselect_no_mat.result b/mysql-test/r/subselect_no_mat.result index b165226aeb0..e72d25fdafa 100644 --- a/mysql-test/r/subselect_no_mat.result +++ b/mysql-test/r/subselect_no_mat.result @@ -6844,6 +6844,19 @@ id select_type table type possible_keys key key_len ref rows Extra 2 SUBQUERY t1 index a a 5 NULL 1 Using where; Using index 2 SUBQUERY t2 ref b b 5 test.t1.a 2 Using index DROP TABLE t1,t2; +# +# MDEV-405: Server crashes in test_if_skip_sort_order on EXPLAIN with GROUP BY and HAVING in EXISTS subquery +# +CREATE TABLE t1 (a INT, KEY(a)); +INSERT INTO t1 VALUES (1),(8); +CREATE TABLE t2 (b INT, KEY(b)); +INSERT INTO t2 VALUES (45),(17),(20); +EXPLAIN SELECT * FROM t1 WHERE EXISTS ( SELECT a FROM t1, t2 WHERE b = a GROUP BY a HAVING a <> 1 ) ; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +2 SUBQUERY t1 index a a 5 NULL 1 Using where; Using index +2 SUBQUERY t2 ref b b 5 test.t1.a 2 Using index +DROP TABLE t1,t2; set optimizer_switch=default; select @@optimizer_switch like '%materialization=on%'; @@optimizer_switch like '%materialization=on%' diff --git a/mysql-test/r/subselect_no_opts.result b/mysql-test/r/subselect_no_opts.result index f8230baec1e..9030265356b 100644 --- a/mysql-test/r/subselect_no_opts.result +++ b/mysql-test/r/subselect_no_opts.result @@ -6841,4 +6841,17 @@ id select_type table type possible_keys key key_len ref rows Extra 2 SUBQUERY t1 index a a 5 NULL 1 Using where; Using index 2 SUBQUERY t2 ref b b 5 test.t1.a 2 Using index DROP TABLE t1,t2; +# +# MDEV-405: Server crashes in test_if_skip_sort_order on EXPLAIN with GROUP BY and HAVING in EXISTS subquery +# +CREATE TABLE t1 (a INT, KEY(a)); +INSERT INTO t1 VALUES (1),(8); +CREATE TABLE t2 (b INT, KEY(b)); +INSERT INTO t2 VALUES (45),(17),(20); +EXPLAIN SELECT * FROM t1 WHERE EXISTS ( SELECT a FROM t1, t2 WHERE b = a GROUP BY a HAVING a <> 1 ) ; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +2 SUBQUERY t1 index a a 5 NULL 1 Using where; Using index +2 SUBQUERY t2 ref b b 5 test.t1.a 2 Using index +DROP TABLE t1,t2; set @optimizer_switch_for_subselect_test=null; diff --git a/mysql-test/r/subselect_no_scache.result b/mysql-test/r/subselect_no_scache.result index 22b148e7615..e68f5990c08 100644 --- a/mysql-test/r/subselect_no_scache.result +++ b/mysql-test/r/subselect_no_scache.result @@ -6852,6 +6852,19 @@ id select_type table type possible_keys key key_len ref rows Extra 2 SUBQUERY t1 index a a 5 NULL 1 Using where; Using index 2 SUBQUERY t2 ref b b 5 test.t1.a 2 Using index DROP TABLE t1,t2; +# +# MDEV-405: Server crashes in test_if_skip_sort_order on EXPLAIN with GROUP BY and HAVING in EXISTS subquery +# +CREATE TABLE t1 (a INT, KEY(a)); +INSERT INTO t1 VALUES (1),(8); +CREATE TABLE t2 (b INT, KEY(b)); +INSERT INTO t2 VALUES (45),(17),(20); +EXPLAIN SELECT * FROM t1 WHERE EXISTS ( SELECT a FROM t1, t2 WHERE b = a GROUP BY a HAVING a <> 1 ) ; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +2 SUBQUERY t1 index a a 5 NULL 1 Using where; Using index +2 SUBQUERY t2 ref b b 5 test.t1.a 2 Using index +DROP TABLE t1,t2; set optimizer_switch=default; select @@optimizer_switch like '%subquery_cache=on%'; @@optimizer_switch like '%subquery_cache=on%' diff --git a/mysql-test/r/subselect_no_semijoin.result b/mysql-test/r/subselect_no_semijoin.result index 81aa60df4d7..f0ce541294a 100644 --- a/mysql-test/r/subselect_no_semijoin.result +++ b/mysql-test/r/subselect_no_semijoin.result @@ -6841,5 +6841,18 @@ id select_type table type possible_keys key key_len ref rows Extra 2 SUBQUERY t1 index a a 5 NULL 1 Using where; Using index 2 SUBQUERY t2 ref b b 5 test.t1.a 2 Using index DROP TABLE t1,t2; +# +# MDEV-405: Server crashes in test_if_skip_sort_order on EXPLAIN with GROUP BY and HAVING in EXISTS subquery +# +CREATE TABLE t1 (a INT, KEY(a)); +INSERT INTO t1 VALUES (1),(8); +CREATE TABLE t2 (b INT, KEY(b)); +INSERT INTO t2 VALUES (45),(17),(20); +EXPLAIN SELECT * FROM t1 WHERE EXISTS ( SELECT a FROM t1, t2 WHERE b = a GROUP BY a HAVING a <> 1 ) ; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +2 SUBQUERY t1 index a a 5 NULL 1 Using where; Using index +2 SUBQUERY t2 ref b b 5 test.t1.a 2 Using index +DROP TABLE t1,t2; set @optimizer_switch_for_subselect_test=null; set @join_cache_level_for_subselect_test=NULL; diff --git a/mysql-test/t/subselect.test b/mysql-test/t/subselect.test index f8992bab79b..9f35ecc43f1 100644 --- a/mysql-test/t/subselect.test +++ b/mysql-test/t/subselect.test @@ -5756,3 +5756,16 @@ EXPLAIN SELECT * FROM t1 WHERE EXISTS ( SELECT a FROM t1, t2 WHERE b = a GROUP B DROP TABLE t1,t2; +--echo # +--echo # MDEV-405: Server crashes in test_if_skip_sort_order on EXPLAIN with GROUP BY and HAVING in EXISTS subquery +--echo # +CREATE TABLE t1 (a INT, KEY(a)); +INSERT INTO t1 VALUES (1),(8); + +CREATE TABLE t2 (b INT, KEY(b)); +INSERT INTO t2 VALUES (45),(17),(20); + +EXPLAIN SELECT * FROM t1 WHERE EXISTS ( SELECT a FROM t1, t2 WHERE b = a GROUP BY a HAVING a <> 1 ) ; + +DROP TABLE t1,t2; + From b6eccf51c05105fb56275b1fa2055c4a14fe7459 Mon Sep 17 00:00:00 2001 From: Sergey Petrunya Date: Tue, 28 Aug 2012 16:03:22 +0400 Subject: [PATCH 136/164] Update test results (checked) --- mysql-test/r/explain.result | 10 +++++----- mysql-test/r/group_min_max.result | 10 +++++----- mysql-test/r/key.result | 2 +- mysql-test/r/limit_rows_examined.result | 2 +- 4 files changed, 12 insertions(+), 12 deletions(-) diff --git a/mysql-test/r/explain.result b/mysql-test/r/explain.result index e081b56e6ce..919e29f185e 100644 --- a/mysql-test/r/explain.result +++ b/mysql-test/r/explain.result @@ -287,7 +287,7 @@ WHERE t1.f1 GROUP BY t1.f1)); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 system NULL NULL NULL NULL 1 2 SUBQUERY a system NULL NULL NULL NULL 1 -2 SUBQUERY t1 fulltext f1_2,f1 f1 0 1 +2 SUBQUERY t1 fulltext f1_2,f1 f1 0 1 Using where PREPARE stmt FROM 'EXPLAIN SELECT 1 FROM t1 WHERE 1 > ALL((SELECT t1.f1 FROM t1 RIGHT OUTER JOIN t1 a @@ -297,12 +297,12 @@ EXECUTE stmt; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 system NULL NULL NULL NULL 1 2 SUBQUERY a system NULL NULL NULL NULL 1 -2 SUBQUERY t1 fulltext f1_2,f1 f1 0 1 +2 SUBQUERY t1 fulltext f1_2,f1 f1 0 1 Using where EXECUTE stmt; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 system NULL NULL NULL NULL 1 2 SUBQUERY a system NULL NULL NULL NULL 1 -2 SUBQUERY t1 fulltext f1_2,f1 f1 0 1 +2 SUBQUERY t1 fulltext f1_2,f1 f1 0 1 Using where DEALLOCATE PREPARE stmt; PREPARE stmt FROM 'EXPLAIN SELECT 1 FROM t1 @@ -313,12 +313,12 @@ EXECUTE stmt; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 system NULL NULL NULL NULL 1 2 SUBQUERY a system NULL NULL NULL NULL 1 -2 SUBQUERY t1 fulltext f1_2,f1 f1 0 1 +2 SUBQUERY t1 fulltext f1_2,f1 f1 0 1 Using where EXECUTE stmt; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 system NULL NULL NULL NULL 1 2 SUBQUERY a system NULL NULL NULL NULL 1 -2 SUBQUERY t1 fulltext f1_2,f1 f1 0 1 +2 SUBQUERY t1 fulltext f1_2,f1 f1 0 1 Using where DEALLOCATE PREPARE stmt; DROP TABLE t1; End of 5.1 tests. diff --git a/mysql-test/r/group_min_max.result b/mysql-test/r/group_min_max.result index 95caa6853b8..ce0793b70a6 100644 --- a/mysql-test/r/group_min_max.result +++ b/mysql-test/r/group_min_max.result @@ -2403,7 +2403,7 @@ EXPLAIN SELECT 1 FROM t1 AS t1_outer WHERE (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2) > 12; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE -2 SUBQUERY t1 index NULL a 10 NULL 15 Using index +2 SUBQUERY t1 range NULL a 5 NULL 8 Using index for group-by EXPLAIN SELECT 1 FROM t1 AS t1_outer WHERE a IN (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2); id select_type table type possible_keys key key_len ref rows Extra @@ -2421,7 +2421,7 @@ AND t1_outer1.b = t1_outer2.b; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1_outer1 ref a a 5 const 1 Using where; Using index 1 PRIMARY t1_outer2 index NULL a 10 NULL 15 Using where; Using index; Using join buffer (flat, BNL join) -2 SUBQUERY t1 index NULL a 10 NULL 15 Using index +2 SUBQUERY t1 range NULL a 5 NULL 8 Using index for group-by EXPLAIN SELECT (SELECT (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2) x FROM t1 AS t1_outer) x2 FROM t1 AS t1_outer2; id select_type table type possible_keys key key_len ref rows Extra @@ -2757,7 +2757,7 @@ EXPLAIN SELECT MIN( a ) FROM t1 WHERE a = (SELECT a FROM t1 WHERE a < 0); id select_type table type possible_keys key key_len ref rows Extra x x x x x x x x x Impossible WHERE noticed after reading const tables -x x x x x x x x x Using index +x x x x x x x x x Using where; Using index SELECT MIN( a ) FROM t1 WHERE a = (SELECT a FROM t1 WHERE a < 0); MIN( a ) NULL @@ -2829,7 +2829,7 @@ EXPLAIN SELECT MIN( a ) FROM t1 WHERE a = (SELECT a FROM t1 WHERE a < 0); id select_type table type possible_keys key key_len ref rows Extra x x x x x x x x x Impossible WHERE noticed after reading const tables -x x x x x x x x x Using index +x x x x x x x x x Using where; Using index SELECT MIN( a ) FROM t1 WHERE a = (SELECT a FROM t1 WHERE a < 0); MIN( a ) NULL @@ -2908,7 +2908,7 @@ EXPLAIN SELECT MIN( a ) FROM t1 WHERE a = (SELECT a FROM t1 WHERE a < 0); id select_type table type possible_keys key key_len ref rows Extra x x x x x x x x x Impossible WHERE noticed after reading const tables -x x x x x x x x x Using index +x x x x x x x x x Using where; Using index SELECT MIN( a ) FROM t1 WHERE a = (SELECT a FROM t1 WHERE a < 0); MIN( a ) NULL diff --git a/mysql-test/r/key.result b/mysql-test/r/key.result index e215caadb1c..e63afeab126 100644 --- a/mysql-test/r/key.result +++ b/mysql-test/r/key.result @@ -599,7 +599,7 @@ EXPLAIN SELECT 1 FROM t1 AS t1_outer WHERE (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2) > 12; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE -2 SUBQUERY t1 index NULL a 10 NULL 15 Using index +2 SUBQUERY t1 range NULL a 5 NULL 8 Using index for group-by SELECT 1 as RES FROM t1 AS t1_outer WHERE (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2) > 12; RES diff --git a/mysql-test/r/limit_rows_examined.result b/mysql-test/r/limit_rows_examined.result index 3a5212818ef..f4242f17a14 100644 --- a/mysql-test/r/limit_rows_examined.result +++ b/mysql-test/r/limit_rows_examined.result @@ -679,7 +679,7 @@ id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 system NULL NULL NULL NULL 1 Using temporary 1 PRIMARY t2 ALL NULL NULL NULL NULL 3 Distinct 2 SUBQUERY t3 ALL NULL NULL NULL NULL 3 -2 SUBQUERY t2 ALL NULL NULL NULL NULL 3 +2 SUBQUERY t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join) SELECT DISTINCT a AS field1 FROM t1, t2 WHERE EXISTS (SELECT c FROM t3 LEFT JOIN t2 ON b = d) HAVING field1 > 'aaa' LIMIT ROWS EXAMINED 20; From 7dad53633762174405c5e84137801e10f930e71a Mon Sep 17 00:00:00 2001 From: Michael Widenius Date: Tue, 28 Aug 2012 19:39:49 +0300 Subject: [PATCH 137/164] Split ER_NO_SUCH_TABLE into ER_NO_SUCH_TABLE and ER_NO_SUCH_TABLE_IN_ENGINE to be able to distingus if a .frm file is missing or if the table is missing in the engine. sql/handler.cc: Added ER_NO_SUCH_TABLE_IN_ENGINE sql/rpl_record.cc: Fixed wrong printf sql/share/errmsg-utf8.txt: Added ER_NO_SUCH_TABLE_IN_ENGINE sql/sp.cc: Added ER_NO_SUCH_TABLE_IN_ENGINE sql/sp_head.cc: Added ER_NO_SUCH_TABLE_IN_ENGINE sql/sql_admin.cc: Added ER_NO_SUCH_TABLE_IN_ENGINE sql/sql_base.cc: Added ER_NO_SUCH_TABLE_IN_ENGINE sql/sql_show.cc: Added ER_NO_SUCH_TABLE_IN_ENGINE sql/table.cc: Fixed typo --- sql/handler.cc | 2 +- sql/rpl_record.cc | 2 +- sql/share/errmsg-utf8.txt | 3 +++ sql/sp.cc | 1 + sql/sp_head.cc | 1 + sql/sql_admin.cc | 1 + sql/sql_base.cc | 10 +++++++--- sql/sql_show.cc | 1 + sql/table.cc | 2 +- 9 files changed, 17 insertions(+), 6 deletions(-) diff --git a/sql/handler.cc b/sql/handler.cc index 9ded738055e..58d37532796 100644 --- a/sql/handler.cc +++ b/sql/handler.cc @@ -3009,7 +3009,7 @@ void handler::print_error(int error, myf errflag) textno=ER_TABLE_DEF_CHANGED; break; case HA_ERR_NO_SUCH_TABLE: - my_error(ER_NO_SUCH_TABLE, errflag, table_share->db.str, + my_error(ER_NO_SUCH_TABLE_IN_ENGINE, errflag, table_share->db.str, table_share->table_name.str); DBUG_VOID_RETURN; case HA_ERR_RBR_LOGGING_FAILED: diff --git a/sql/rpl_record.cc b/sql/rpl_record.cc index b883ec8df03..99bf8a82004 100644 --- a/sql/rpl_record.cc +++ b/sql/rpl_record.cc @@ -314,7 +314,7 @@ unpack_row(Relay_log_info const *rli, if (!pack_ptr) { rli->report(ERROR_LEVEL, ER_SLAVE_CORRUPT_EVENT, - "Could not read field %`s of table %`s.%`s", + "Could not read field '%s' of table '%s.%s'", f->field_name, table->s->db.str, table->s->table_name.str); DBUG_RETURN(ER_SLAVE_CORRUPT_EVENT); diff --git a/sql/share/errmsg-utf8.txt b/sql/share/errmsg-utf8.txt index 923e8e73bc7..31a6f13e52f 100644 --- a/sql/share/errmsg-utf8.txt +++ b/sql/share/errmsg-utf8.txt @@ -6585,3 +6585,6 @@ ER_STORED_FUNCTION_PREVENTS_SWITCH_SKIP_REPLICATION eng "Cannot modify @@session.skip_replication inside a stored function or trigger" ER_QUERY_EXCEEDED_ROWS_EXAMINED_LIMIT eng "Query execution was interrupted. The query examined at least %llu rows, which exceeds LIMIT ROWS EXAMINED (%llu). The query result may be incomplete." +ER_NO_SUCH_TABLE_IN_ENGINE 42S02 + eng "Table '%-.192s.%-.192s' doesn't exist in engine" + swe "Det finns ingen tabell som heter '%-.192s.%-.192s' i handlern" diff --git a/sql/sp.cc b/sql/sp.cc index 29195234a5a..93cd64b4104 100644 --- a/sql/sp.cc +++ b/sql/sp.cc @@ -1429,6 +1429,7 @@ public: MYSQL_ERROR ** cond_hdl) { if (sql_errno == ER_NO_SUCH_TABLE || + sql_errno == ER_NO_SUCH_TABLE_IN_ENGINE || sql_errno == ER_CANNOT_LOAD_FROM_TABLE || sql_errno == ER_COL_COUNT_DOESNT_MATCH_PLEASE_UPDATE || sql_errno == ER_COL_COUNT_DOESNT_MATCH_CORRUPTED) diff --git a/sql/sp_head.cc b/sql/sp_head.cc index 9a356cb3321..f3ba0073c69 100644 --- a/sql/sp_head.cc +++ b/sql/sp_head.cc @@ -3032,6 +3032,7 @@ sp_lex_keeper::reset_lex_and_exec_core(THD *thd, uint *nextp, if (!res || !thd->is_error() || (thd->stmt_da->sql_errno() != ER_CANT_REOPEN_TABLE && thd->stmt_da->sql_errno() != ER_NO_SUCH_TABLE && + thd->stmt_da->sql_errno() != ER_NO_SUCH_TABLE_IN_ENGINE && thd->stmt_da->sql_errno() != ER_UPDATE_TABLE_USED)) thd->stmt_arena->state= Query_arena::STMT_EXECUTED; diff --git a/sql/sql_admin.cc b/sql/sql_admin.cc index 8d0f2e5634f..c65e56edbe0 100644 --- a/sql/sql_admin.cc +++ b/sql/sql_admin.cc @@ -285,6 +285,7 @@ end: static inline bool table_not_corrupt_error(uint sql_errno) { return (sql_errno == ER_NO_SUCH_TABLE || + sql_errno == ER_NO_SUCH_TABLE_IN_ENGINE || sql_errno == ER_FILE_NOT_FOUND || sql_errno == ER_LOCK_WAIT_TIMEOUT || sql_errno == ER_LOCK_DEADLOCK || diff --git a/sql/sql_base.cc b/sql/sql_base.cc index 95b1843f5e1..52569f193aa 100644 --- a/sql/sql_base.cc +++ b/sql/sql_base.cc @@ -70,7 +70,7 @@ No_such_table_error_handler::handle_condition(THD *, MYSQL_ERROR ** cond_hdl) { *cond_hdl= NULL; - if (sql_errno == ER_NO_SUCH_TABLE) + if (sql_errno == ER_NO_SUCH_TABLE || sql_errno == ER_NO_SUCH_TABLE_IN_ENGINE) { m_handled_errors++; return TRUE; @@ -144,7 +144,9 @@ Repair_mrg_table_error_handler::handle_condition(THD *, MYSQL_ERROR ** cond_hdl) { *cond_hdl= NULL; - if (sql_errno == ER_NO_SUCH_TABLE || sql_errno == ER_WRONG_MRG_TABLE) + if (sql_errno == ER_NO_SUCH_TABLE || + sql_errno == ER_NO_SUCH_TABLE_IN_ENGINE || + sql_errno == ER_WRONG_MRG_TABLE) { m_handled_errors= true; return TRUE; @@ -717,7 +719,9 @@ get_table_share_with_discover(THD *thd, TABLE_LIST *table_list, @todo Rework alternative ways to deal with ER_NO_SUCH TABLE. */ - if (share || (thd->is_error() && thd->stmt_da->sql_errno() != ER_NO_SUCH_TABLE)) + if (share || + (thd->is_error() && thd->stmt_da->sql_errno() != ER_NO_SUCH_TABLE && + thd->stmt_da->sql_errno() != ER_NO_SUCH_TABLE_IN_ENGINE)) DBUG_RETURN(share); *error= 0; diff --git a/sql/sql_show.cc b/sql/sql_show.cc index 5e3095181ee..8a106b8ec6f 100644 --- a/sql/sql_show.cc +++ b/sql/sql_show.cc @@ -660,6 +660,7 @@ public: break; case ER_NO_SUCH_TABLE: + case ER_NO_SUCH_TABLE_IN_ENGINE: /* Established behavior: warn if underlying tables are missing. */ push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_VIEW_INVALID, diff --git a/sql/table.cc b/sql/table.cc index b8161093e9a..d733c5ada62 100644 --- a/sql/table.cc +++ b/sql/table.cc @@ -4393,7 +4393,7 @@ bool TABLE_LIST::prep_check_option(THD *thd, uint8 check_opt_type) There are currently two mechanisms at work that handle errors for views, this one and a more general mechanism based on an Internal_error_handler, see Show_create_error_handler. The latter handles errors encountered during - execution of SHOW CREATE VIEW, while the machanism using this method is + execution of SHOW CREATE VIEW, while the mechanism using this method is handles SELECT from views. The two methods should not clash. @param[in,out] thd thread handler From 95ee3fbf306d28ba315992ea4af458a4fcfb081b Mon Sep 17 00:00:00 2001 From: unknown Date: Wed, 29 Aug 2012 11:35:42 +0300 Subject: [PATCH 138/164] MDEV-492: fixed incorrect error check. --- mysql-test/r/errors.result | 8 ++++++++ mysql-test/t/errors.test | 9 +++++++++ sql/sql_update.cc | 2 +- 3 files changed, 18 insertions(+), 1 deletion(-) diff --git a/mysql-test/r/errors.result b/mysql-test/r/errors.result index e52bdcf336c..62c9a86a46c 100644 --- a/mysql-test/r/errors.result +++ b/mysql-test/r/errors.result @@ -69,3 +69,11 @@ ERROR 42S22: Unknown column '' in 'VALUES() function' INSERT INTO t2(a,b) VALUES (1,0) ON DUPLICATE KEY UPDATE b=(SELECT VALUES(a)+2 FROM t1); DROP TABLE t1, t2; +# +# MDEV-492: incorrect error check before sending OK in mysql_update +# +CREATE TABLE t1 (a CHAR(3), b BLOB); +UPDATE t1 SET a = 'new' +WHERE COLUMN_CREATE( 1, 'v', 1, 'w' ) IS NULL; +ERROR 22007: Illegal value used as argument of dynamic column function +drop table t1; diff --git a/mysql-test/t/errors.test b/mysql-test/t/errors.test index b426d9fd5b0..b6aeee63677 100644 --- a/mysql-test/t/errors.test +++ b/mysql-test/t/errors.test @@ -85,3 +85,12 @@ INSERT INTO t2 VALUES (1,0) ON DUPLICATE KEY UPDATE INSERT INTO t2(a,b) VALUES (1,0) ON DUPLICATE KEY UPDATE b=(SELECT VALUES(a)+2 FROM t1); DROP TABLE t1, t2; + +--echo # +--echo # MDEV-492: incorrect error check before sending OK in mysql_update +--echo # +CREATE TABLE t1 (a CHAR(3), b BLOB); +--error ER_DYN_COL_DATA +UPDATE t1 SET a = 'new' +WHERE COLUMN_CREATE( 1, 'v', 1, 'w' ) IS NULL; +drop table t1; diff --git a/sql/sql_update.cc b/sql/sql_update.cc index 4f816e5f032..7d6eb62f57d 100644 --- a/sql/sql_update.cc +++ b/sql/sql_update.cc @@ -359,7 +359,7 @@ int mysql_update(THD *thd, table->file->info(HA_STATUS_VARIABLE | HA_STATUS_NO_LOCK); select= make_select(table, 0, 0, conds, 0, &error); - if (error || !limit || + if (error || !limit || thd->is_error() || (select && select->check_quick(thd, safe_update, limit))) { delete select; From a44331ab3407488368c9984258ce4c3160872816 Mon Sep 17 00:00:00 2001 From: Sergei Golubchik Date: Wed, 29 Aug 2012 10:59:51 +0200 Subject: [PATCH 139/164] MDEV-456 An out-of-range datetime value (with a 5-digit year) can be created and cause troubles fix Item_func_add_time::get_date() to generate valid dates. Move the validity check inside get_date_from_daynr() instead of relying on callers (5 that had it, and 2 that did not, but should've) --- mysql-test/r/datetime_456.result | 8 ++++ mysql-test/t/datetime_456.test | 8 ++++ sql/item_timefunc.cc | 35 ++++++++------- sql/mysql_priv.h | 2 +- sql/time.cc | 75 +++++++++++++++----------------- 5 files changed, 68 insertions(+), 60 deletions(-) create mode 100644 mysql-test/r/datetime_456.result create mode 100644 mysql-test/t/datetime_456.test diff --git a/mysql-test/r/datetime_456.result b/mysql-test/r/datetime_456.result new file mode 100644 index 00000000000..ba020a250b7 --- /dev/null +++ b/mysql-test/r/datetime_456.result @@ -0,0 +1,8 @@ +create table t1 (d datetime); +insert t1 values (addtime('9999-12-31 23:59:59', '00:00:01')), +(from_days(3652499)); +select * from t1; +d +NULL +NULL +drop table t1; diff --git a/mysql-test/t/datetime_456.test b/mysql-test/t/datetime_456.test new file mode 100644 index 00000000000..0c187959d52 --- /dev/null +++ b/mysql-test/t/datetime_456.test @@ -0,0 +1,8 @@ +# +# MDEV-456 An out-of-range datetime value (with a 5-digit year) can be created and cause troubles +# +create table t1 (d datetime); +insert t1 values (addtime('9999-12-31 23:59:59', '00:00:01')), + (from_days(3652499)); +select * from t1; +drop table t1; diff --git a/sql/item_timefunc.cc b/sql/item_timefunc.cc index eec8dde080c..2cd8b3215c4 100644 --- a/sql/item_timefunc.cc +++ b/sql/item_timefunc.cc @@ -341,9 +341,8 @@ static bool extract_date_time(DATE_TIME_FORMAT *format, { uint days; days= calc_daynr(l_time->year,1,1) + yearday - 1; - if (days <= 0 || days > MAX_DAY_NUMBER) + if (get_date_from_daynr(days,&l_time->year,&l_time->month,&l_time->day)) goto err; - get_date_from_daynr(days,&l_time->year,&l_time->month,&l_time->day); } if (week_number >= 0 && weekday) @@ -388,9 +387,8 @@ static bool extract_date_time(DATE_TIME_FORMAT *format, (weekday - 1); } - if (days <= 0 || days > MAX_DAY_NUMBER) + if (get_date_from_daynr(days,&l_time->year,&l_time->month,&l_time->day)) goto err; - get_date_from_daynr(days,&l_time->year,&l_time->month,&l_time->day); } if (l_time->month > 12 || l_time->day > 31 || l_time->hour > 23 || @@ -1385,13 +1383,16 @@ bool Item_func_from_days::get_date(MYSQL_TIME *ltime, uint fuzzy_date) if ((null_value=args[0]->null_value)) return 1; bzero(ltime, sizeof(MYSQL_TIME)); - get_date_from_daynr((long) value, <ime->year, <ime->month, <ime->day); - if ((null_value= ((fuzzy_date & TIME_NO_ZERO_DATE) && ltime->year == 0))) - return TRUE; + if (get_date_from_daynr((long) value, <ime->year, <ime->month, + <ime->day)) + return (null_value= 1); + + if ((fuzzy_date & TIME_NO_ZERO_DATE) && ltime->year == 0) + return (null_value= 1); ltime->time_type= MYSQL_TIMESTAMP_DATE; - return 0; + return (null_value= 0); } @@ -2388,14 +2389,12 @@ bool Item_func_makedate::get_date(MYSQL_TIME *ltime, uint fuzzy_date) year= year_2000_handling(year); days= calc_daynr(year,1,1) + daynr - 1; - /* Day number from year 0 to 9999-12-31 */ - if (days >= 0 && days <= MAX_DAY_NUMBER) - { - bzero(ltime, sizeof(*ltime)); - ltime->time_type= MYSQL_TIMESTAMP_DATE; - get_date_from_daynr(days, <ime->year, <ime->month, <ime->day); - return (null_value= 0); - } + if (get_date_from_daynr(days, <ime->year, <ime->month, <ime->day)) + goto err; + ltime->time_type= MYSQL_TIMESTAMP_DATE; + ltime->neg= 0; + ltime->hour= ltime->minute= ltime->second= ltime->second_part= 0; + return (null_value= 0); err: return (null_value= 1); @@ -2489,8 +2488,8 @@ bool Item_func_add_time::get_date(MYSQL_TIME *ltime, uint fuzzy_date) if (!is_time) { - get_date_from_daynr(days,<ime->year,<ime->month,<ime->day); - if (!ltime->day) + if (get_date_from_daynr(days,<ime->year,<ime->month,<ime->day) || + !ltime->day) return (null_value= 1); return (null_value= 0); } diff --git a/sql/mysql_priv.h b/sql/mysql_priv.h index 605d9353cae..14810fc7119 100644 --- a/sql/mysql_priv.h +++ b/sql/mysql_priv.h @@ -2445,7 +2445,7 @@ void free_field_buffers_larger_than(TABLE *table, uint32 size); int set_zone(int nr,int min_zone,int max_zone); ulong convert_period_to_month(ulong period); ulong convert_month_to_period(ulong month); -void get_date_from_daynr(long daynr,uint *year, uint *month, +bool get_date_from_daynr(long daynr,uint *year, uint *month, uint *day); my_time_t TIME_to_timestamp(THD *thd, const MYSQL_TIME *t, uint *error); bool str_to_time_with_warn(const char *str,uint length,MYSQL_TIME *l_time, diff --git a/sql/time.cc b/sql/time.cc index 778f8b8f313..21ecc3f8050 100644 --- a/sql/time.cc +++ b/sql/time.cc @@ -24,9 +24,9 @@ #include - /* Some functions to calculate dates */ +#define MAX_DAY_NUMBER 3652424L -#ifndef TESTTIME + /* Some functions to calculate dates */ /* Name description of interval names used in statements. @@ -146,46 +146,42 @@ uint calc_week(MYSQL_TIME *l_time, uint week_behaviour, uint *year) /* Change a daynr to year, month and day */ /* Daynr 0 is returned as date 00.00.00 */ -void get_date_from_daynr(long daynr,uint *ret_year,uint *ret_month, +bool get_date_from_daynr(long daynr,uint *ret_year,uint *ret_month, uint *ret_day) { uint year,temp,leap_day,day_of_year,days_in_year; uchar *month_pos; DBUG_ENTER("get_date_from_daynr"); - if (daynr <= 365L || daynr >= 3652500) - { /* Fix if wrong daynr */ - *ret_year= *ret_month = *ret_day =0; - } - else + if (daynr < 365 || daynr > MAX_DAY_NUMBER) + DBUG_RETURN(1); + + year= (uint) (daynr*100 / 36525L); + temp=(((year-1)/100+1)*3)/4; + day_of_year=(uint) (daynr - (long) year * 365L) - (year-1)/4 +temp; + while (day_of_year > (days_in_year= calc_days_in_year(year))) { - year= (uint) (daynr*100 / 36525L); - temp=(((year-1)/100+1)*3)/4; - day_of_year=(uint) (daynr - (long) year * 365L) - (year-1)/4 +temp; - while (day_of_year > (days_in_year= calc_days_in_year(year))) - { - day_of_year-=days_in_year; - (year)++; - } - leap_day=0; - if (days_in_year == 366) - { - if (day_of_year > 31+28) - { - day_of_year--; - if (day_of_year == 31+28) - leap_day=1; /* Handle leapyears leapday */ - } - } - *ret_month=1; - for (month_pos= days_in_month ; - day_of_year > (uint) *month_pos ; - day_of_year-= *(month_pos++), (*ret_month)++) - ; - *ret_year=year; - *ret_day=day_of_year+leap_day; + day_of_year-=days_in_year; + (year)++; } - DBUG_VOID_RETURN; + leap_day=0; + if (days_in_year == 366) + { + if (day_of_year > 31+28) + { + day_of_year--; + if (day_of_year == 31+28) + leap_day=1; /* Handle leapyears leapday */ + } + } + *ret_month=1; + for (month_pos= days_in_month ; + day_of_year > (uint) *month_pos ; + day_of_year-= *(month_pos++), (*ret_month)++) + ; + *ret_year=year; + *ret_day=day_of_year+leap_day; + DBUG_RETURN(0); } /* Functions to handle periods */ @@ -805,7 +801,6 @@ void make_truncated_value_warning(THD *thd, /* Daynumber from year 0 to 9999-12-31 */ -#define MAX_DAY_NUMBER 3652424L #define COMBINE(X) \ (((((X)->day * 24LL + (X)->hour) * 60LL + \ (X)->minute) * 60LL + (X)->second)*1000000LL + \ @@ -872,19 +867,18 @@ bool date_add_interval(MYSQL_TIME *ltime, interval_type int_type, daynr= usec; /* Day number from year 0 to 9999-12-31 */ - if ((ulonglong) daynr > MAX_DAY_NUMBER) + if (get_date_from_daynr((long) daynr, <ime->year, <ime->month, + <ime->day)) goto invalid_date; - get_date_from_daynr((long) daynr, <ime->year, <ime->month, - <ime->day); break; } case INTERVAL_WEEK: period= (calc_daynr(ltime->year,ltime->month,ltime->day) + sign * (long) interval.day); /* Daynumber from year 0 to 9999-12-31 */ - if ((ulong) period > MAX_DAY_NUMBER) + if (get_date_from_daynr((long) period,<ime->year,<ime->month, + <ime->day)) goto invalid_date; - get_date_from_daynr((long) period,<ime->year,<ime->month,<ime->day); break; case INTERVAL_YEAR: ltime->year+= sign * (long) interval.year; @@ -1034,4 +1028,3 @@ int my_time_compare(MYSQL_TIME *a, MYSQL_TIME *b) return 0; } -#endif From b45c551ee32d0d5260f4958abf93efab1a4614a2 Mon Sep 17 00:00:00 2001 From: Sergei Golubchik Date: Wed, 29 Aug 2012 15:19:17 +0200 Subject: [PATCH 140/164] MDEV-448 Memory loss warnings in mysqldump when more than one schema is dumped --- client/mysqldump.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/client/mysqldump.c b/client/mysqldump.c index c20d4947185..e9a7a66298e 100644 --- a/client/mysqldump.c +++ b/client/mysqldump.c @@ -4180,6 +4180,7 @@ static int dump_all_databases() if (dump_all_tables_in_db(row[0])) result=1; } + mysql_free_result(tableres); if (seen_views) { if (mysql_query(mysql, "SHOW DATABASES") || @@ -4202,6 +4203,7 @@ static int dump_all_databases() if (dump_all_views_in_db(row[0])) result=1; } + mysql_free_result(tableres); } return result; } @@ -4330,8 +4332,6 @@ static int init_dumping(char *database, int init_func(char*)) check_io(md_result_file); } } - if (extended_insert) - init_dynamic_string_checked(&extended_row, "", 1024, 1024); return 0; } /* init_dumping */ @@ -5608,6 +5608,9 @@ int main(int argc, char **argv) if (opt_alltspcs) dump_all_tablespaces(); + if (extended_insert) + init_dynamic_string_checked(&extended_row, "", 1024, 1024); + if (opt_alldbs) { if (!opt_alltspcs && !opt_notspcs) From 3444e8e9254070f836488dae12b5c825cc9c563f Mon Sep 17 00:00:00 2001 From: Sergei Golubchik Date: Wed, 29 Aug 2012 17:55:59 +0200 Subject: [PATCH 141/164] MDEV-454 Addition of a time interval reduces the resulting value 1. Field_newdate::get_date should refuse to return a date with zeros when TIME_NO_ZERO_IN_DATE is set, not when TIME_FUZZY_DATE is unset 2. Item_func_to_days and Item_date_add_interval can only work with valid dates, no zeros allowed. --- mysql-test/r/adddate_454.result | 10 ++++++++++ mysql-test/t/adddate_454.test | 9 +++++++++ sql/field.cc | 2 +- sql/item_timefunc.cc | 4 ++-- 4 files changed, 22 insertions(+), 3 deletions(-) create mode 100644 mysql-test/r/adddate_454.result create mode 100644 mysql-test/t/adddate_454.test diff --git a/mysql-test/r/adddate_454.result b/mysql-test/r/adddate_454.result new file mode 100644 index 00000000000..0993cdce32c --- /dev/null +++ b/mysql-test/r/adddate_454.result @@ -0,0 +1,10 @@ +create table t1 (d date); +insert into t1 values ('2012-00-00'); +select * from t1; +d +2012-00-00 +update t1 set d = adddate(d, interval 1 day); +select * from t1; +d +NULL +drop table t1; diff --git a/mysql-test/t/adddate_454.test b/mysql-test/t/adddate_454.test new file mode 100644 index 00000000000..1d69cdc9558 --- /dev/null +++ b/mysql-test/t/adddate_454.test @@ -0,0 +1,9 @@ +# +# MDEV-454 Addition of a time interval reduces the resulting value +# +create table t1 (d date); +insert into t1 values ('2012-00-00'); +select * from t1; +update t1 set d = adddate(d, interval 1 day); +select * from t1; +drop table t1; diff --git a/sql/field.cc b/sql/field.cc index cf5b6cf2ff9..9b0f6a7dfcd 100644 --- a/sql/field.cc +++ b/sql/field.cc @@ -5789,7 +5789,7 @@ bool Field_newdate::get_date(MYSQL_TIME *ltime,uint fuzzydate) if (!tmp) return fuzzydate & TIME_NO_ZERO_DATE; if (!ltime->month || !ltime->day) - return !(fuzzydate & TIME_FUZZY_DATE); + return fuzzydate & TIME_NO_ZERO_IN_DATE; return 0; } diff --git a/sql/item_timefunc.cc b/sql/item_timefunc.cc index 2cd8b3215c4..bdad96f12ef 100644 --- a/sql/item_timefunc.cc +++ b/sql/item_timefunc.cc @@ -751,7 +751,7 @@ longlong Item_func_to_days::val_int() { DBUG_ASSERT(fixed == 1); MYSQL_TIME ltime; - if (get_arg0_date(<ime, TIME_NO_ZERO_DATE)) + if (get_arg0_date(<ime, TIME_NO_ZERO_DATE | TIME_NO_ZERO_IN_DATE)) return 0; return (longlong) calc_daynr(ltime.year,ltime.month,ltime.day); } @@ -1932,7 +1932,7 @@ bool Item_date_add_interval::get_date(MYSQL_TIME *ltime, uint fuzzy_date) { INTERVAL interval; - if (args[0]->get_date(ltime, TIME_NO_ZERO_DATE | TIME_FUZZY_DATE) || + if (args[0]->get_date(ltime, TIME_NO_ZERO_DATE | TIME_FUZZY_DATE | TIME_NO_ZERO_IN_DATE) || get_interval_value(args[1], int_type, &value, &interval)) return (null_value=1); From 2de4f09a75ad878753bb090a4c04291113d7a0c0 Mon Sep 17 00:00:00 2001 From: Sergei Golubchik Date: Wed, 29 Aug 2012 18:36:57 +0200 Subject: [PATCH 142/164] MDEV-438 Microseconds: Precision is ignored in CURRENT_TIMESTAMP(N) when it is given as a default column value The syntax for specifying precision in the DEFAULT clause is unintentional and unsupported. Don't allow it anymore. --- sql/sql_yacc.yy | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/sql/sql_yacc.yy b/sql/sql_yacc.yy index 0f013bfb566..b1772536639 100644 --- a/sql/sql_yacc.yy +++ b/sql/sql_yacc.yy @@ -5453,9 +5453,9 @@ attribute: NULL_SYM { Lex->type&= ~ NOT_NULL_FLAG; } | not NULL_SYM { Lex->type|= NOT_NULL_FLAG; } | DEFAULT now_or_signed_literal { Lex->default_value=$2; } - | ON UPDATE_SYM NOW_SYM opt_time_precision + | ON UPDATE_SYM NOW_SYM optional_braces { - Item *item= new (YYTHD->mem_root) Item_func_now_local($4); + Item *item= new (YYTHD->mem_root) Item_func_now_local(6); if (item == NULL) MYSQL_YYABORT; Lex->on_update_value= item; @@ -5525,9 +5525,9 @@ attribute: ; now_or_signed_literal: - NOW_SYM opt_time_precision + NOW_SYM optional_braces { - $$= new (YYTHD->mem_root) Item_func_now_local($2); + $$= new (YYTHD->mem_root) Item_func_now_local(6); if ($$ == NULL) MYSQL_YYABORT; } From 0536c506ff7c3ed261abc3d02fb787bfdd228abb Mon Sep 17 00:00:00 2001 From: Sergei Golubchik Date: Thu, 30 Aug 2012 09:05:27 +0200 Subject: [PATCH 143/164] MDEV-437 Microseconds: In time functions precision is calculated modulo 256 store the precision in uint, not uint8 --- mysql-test/r/func_time.result | 2 ++ mysql-test/t/func_time.test | 2 ++ sql/item.h | 2 +- 3 files changed, 5 insertions(+), 1 deletion(-) diff --git a/mysql-test/r/func_time.result b/mysql-test/r/func_time.result index b3e2a01e2e3..2df0c691083 100644 --- a/mysql-test/r/func_time.result +++ b/mysql-test/r/func_time.result @@ -1897,3 +1897,5 @@ cast(greatest(cast("0-0-0" as date), cast("10:20:05" as time)) as datetime(6)) select microsecond('12:00:00.123456'), microsecond('2009-12-31 23:59:59.000010'); microsecond('12:00:00.123456') microsecond('2009-12-31 23:59:59.000010') 123456 10 +select now(258); +ERROR 42000: Too big precision 258 specified for 'now'. Maximum is 6. diff --git a/mysql-test/t/func_time.test b/mysql-test/t/func_time.test index 07e6473bfdf..c3d1d74ec50 100644 --- a/mysql-test/t/func_time.test +++ b/mysql-test/t/func_time.test @@ -1142,3 +1142,5 @@ select cast(greatest(cast("0-0-0" as date), cast("10:20:05" as time)) as datetim select microsecond('12:00:00.123456'), microsecond('2009-12-31 23:59:59.000010'); +--error ER_TOO_BIG_PRECISION +select now(258); diff --git a/sql/item.h b/sql/item.h index ab5243a3d0a..055225a79d7 100644 --- a/sql/item.h +++ b/sql/item.h @@ -582,8 +582,8 @@ public: calls. */ uint name_length; /* Length of name */ + uint decimals; int8 marker; - uint8 decimals; bool maybe_null; /* If item may be null */ bool in_rollup; /* If used in GROUP BY list of a query with ROLLUP */ From 10802c4d9046fd54bf1a27cb7611c182ecde93fb Mon Sep 17 00:00:00 2001 From: unknown Date: Thu, 30 Aug 2012 10:53:49 +0200 Subject: [PATCH 144/164] MDEV-381: fdatasync() does not correctly flush growing binlog file. When we append data to the binlog file, we use fdatasync() to ensure the data gets to disk so that crash recovery can work. Unfortunately there seems to be a bug in ext3/ext4 on linux, so that fdatasync() does not correctly sync all data when the size of a file is increased. This causes crash recovery to not work correctly (it loses transactions from the binlog). As a work-around, use fsync() for the binlog, not fdatasync(). Since we are increasing the file size, (correct) fdatasync() will most likely not be faster than fsync() on any file system, and fsync() does work correctly on ext3/ext4. This avoids the need to try to detect if we are running on buggy ext3/ext4. --- include/my_sys.h | 1 + mysys/my_sync.c | 18 ++++++++++++++++-- sql/log.cc | 10 +++++----- 3 files changed, 22 insertions(+), 7 deletions(-) diff --git a/include/my_sys.h b/include/my_sys.h index db22f55f492..ebe643abce5 100644 --- a/include/my_sys.h +++ b/include/my_sys.h @@ -70,6 +70,7 @@ extern int NEAR my_errno; /* Last error in mysys */ #define MY_THREADSAFE 2048 /* my_seek(): lock fd mutex */ #define MY_SYNC 4096 /* my_copy(): sync dst file */ #define MY_SYNC_DIR 32768 /* my_create/delete/rename: sync directory */ +#define MY_SYNC_FILESIZE 65536 /* my_sync(): safe sync when file is extended */ #define MY_CHECK_ERROR 1 /* Params to my_end; Check open-close */ #define MY_GIVE_INFO 2 /* Give time info about process*/ diff --git a/mysys/my_sync.c b/mysys/my_sync.c index d8973244620..33033ff1045 100644 --- a/mysys/my_sync.c +++ b/mysys/my_sync.c @@ -39,6 +39,13 @@ ulong my_sync_count; /* Count number of sync calls */ (which is correct behaviour, if we know that the other thread synced the file before closing) + MY_SYNC_FILESIZE is useful when syncing a file after it has been extended. + On Linux, fdatasync() on ext3/ext4 file systems does not properly flush + to disk the inode data required to preserve the added data across a crash + (this looks to be a bug). But when a file is extended, inode data will most + likely need flushing in any case, so passing MY_SYNC_FILESIZE as flags + is not likely to be any slower, and will be crash safe on Linux ext3/ext4. + RETURN 0 ok -1 error @@ -67,8 +74,12 @@ int my_sync(File fd, myf my_flags) DBUG_PRINT("info",("fcntl(F_FULLFSYNC) failed, falling back")); #endif #if defined(HAVE_FDATASYNC) && HAVE_DECL_FDATASYNC - res= fdatasync(fd); -#elif defined(HAVE_FSYNC) + if (!(my_flags & MY_SYNC_FILESIZE)) + res= fdatasync(fd); + else + { +#endif +#if defined(HAVE_FSYNC) res= fsync(fd); if (res == -1 && errno == ENOLCK) res= 0; /* Result Bug in Old FreeBSD */ @@ -77,6 +88,9 @@ int my_sync(File fd, myf my_flags) #else #error Cannot find a way to sync a file, durability in danger res= 0; /* No sync (strange OS) */ +#endif +#if defined(HAVE_FDATASYNC) && HAVE_DECL_FDATASYNC + } #endif } while (res == -1 && errno == EINTR); diff --git a/sql/log.cc b/sql/log.cc index ddb12457fcd..05e8a66ed04 100644 --- a/sql/log.cc +++ b/sql/log.cc @@ -2838,7 +2838,7 @@ bool MYSQL_BIN_LOG::open(const char *log_name, bytes_written+= description_event_for_queue->data_written; } if (flush_io_cache(&log_file) || - my_sync(log_file.file, MYF(MY_WME))) + my_sync(log_file.file, MYF(MY_WME|MY_SYNC_FILESIZE))) goto err; pthread_mutex_lock(&LOCK_commit_ordered); strmake(last_commit_pos_file, log_file_name, @@ -2864,7 +2864,7 @@ bool MYSQL_BIN_LOG::open(const char *log_name, strlen(log_file_name)) || my_b_write(&index_file, (uchar*) "\n", 1) || flush_io_cache(&index_file) || - my_sync(index_file.file, MYF(MY_WME))) + my_sync(index_file.file, MYF(MY_WME|MY_SYNC_FILESIZE))) goto err; #ifdef HAVE_REPLICATION @@ -2956,7 +2956,7 @@ static bool copy_up_file_and_fill(IO_CACHE *index_file, my_off_t offset) } /* The following will either truncate the file or fill the end with \n' */ if (my_chsize(file, offset - init_offset, '\n', MYF(MY_WME)) || - my_sync(file, MYF(MY_WME))) + my_sync(file, MYF(MY_WME|MY_SYNC_FILESIZE))) goto err; /* Reset data in old index cache */ @@ -3549,7 +3549,7 @@ int MYSQL_BIN_LOG::sync_purge_index_file() DBUG_ENTER("MYSQL_BIN_LOG::sync_purge_index_file"); if ((error= flush_io_cache(&purge_index_file)) || - (error= my_sync(purge_index_file.file, MYF(MY_WME)))) + (error= my_sync(purge_index_file.file, MYF(MY_WME|MY_SYNC_FILESIZE)))) DBUG_RETURN(error); DBUG_RETURN(error); @@ -4139,7 +4139,7 @@ bool MYSQL_BIN_LOG::flush_and_sync() if (++sync_binlog_counter >= sync_binlog_period && sync_binlog_period) { sync_binlog_counter= 0; - err=my_sync(fd, MYF(MY_WME)); + err=my_sync(fd, MYF(MY_WME|MY_SYNC_FILESIZE)); #ifndef DBUG_OFF if (opt_binlog_dbug_fsync_sleep > 0) my_sleep(opt_binlog_dbug_fsync_sleep); From 57694d52b470cf328e7d339dc0934da2b0238841 Mon Sep 17 00:00:00 2001 From: Sergei Golubchik Date: Thu, 30 Aug 2012 11:47:01 +0200 Subject: [PATCH 145/164] MDEV-395 PR_SET_DUMPABLE set in unreachable code --- sql/mysqld.cc | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/sql/mysqld.cc b/sql/mysqld.cc index aa5efe4fbe6..47be8551359 100644 --- a/sql/mysqld.cc +++ b/sql/mysqld.cc @@ -2026,13 +2026,19 @@ static struct passwd *check_user(const char *user) if (!(tmp_user_info= getpwuid(atoi(user)))) goto err; } + return tmp_user_info; /* purecov: end */ err: sql_print_error("Fatal error: Can't change to run as user '%s' ; Please check that the user exists!\n",user); unireg_abort(1); +#endif + return NULL; +} +static inline void allow_coredumps() +{ #ifdef PR_SET_DUMPABLE if (test_flags & TEST_CORE_ON_SIGNAL) { @@ -2040,11 +2046,9 @@ err: (void) prctl(PR_SET_DUMPABLE, 1); } #endif - -#endif - return NULL; } + static void set_user(const char *user, struct passwd *user_info_arg) { /* purecov: begin tested */ @@ -2071,6 +2075,7 @@ static void set_user(const char *user, struct passwd *user_info_arg) sql_perror("setuid"); unireg_abort(1); } + allow_coredumps(); #endif /* purecov: end */ } @@ -2090,6 +2095,7 @@ static void set_effective_user(struct passwd *user_info_arg) sql_perror("setreuid"); unireg_abort(1); } + allow_coredumps(); #endif } From 51e14492e9410718056b0c6d9d4dabd4a96e8070 Mon Sep 17 00:00:00 2001 From: Sergei Golubchik Date: Fri, 31 Aug 2012 12:01:52 +0200 Subject: [PATCH 146/164] compilation warning --- sql/item.cc | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sql/item.cc b/sql/item.cc index f10c491853e..e125e57d2fc 100644 --- a/sql/item.cc +++ b/sql/item.cc @@ -454,8 +454,8 @@ Item::Item(THD *thd, Item *item): orig_name(item->orig_name), max_length(item->max_length), name_length(item->name_length), - marker(item->marker), decimals(item->decimals), + marker(item->marker), maybe_null(item->maybe_null), in_rollup(item->in_rollup), null_value(item->null_value), From a1fd37b1fd5803188d3f8b44914cca459f6e622f Mon Sep 17 00:00:00 2001 From: Sergei Golubchik Date: Fri, 31 Aug 2012 13:03:41 +0200 Subject: [PATCH 147/164] MDEV-414 Depending on indexes or execution plans, a warning on incorrect or out of range values in WHERE condition is sometimes produced and sometimes not use the same method that disables warnings in all relevant places, remove redundant function --- mysql-test/r/partition_pruning.result | 6 ++--- mysql-test/r/type_date.result | 12 ++-------- sql/opt_sum.cc | 2 +- sql/sql_select.cc | 33 +-------------------------- sql/sql_select.h | 2 +- 5 files changed, 8 insertions(+), 47 deletions(-) diff --git a/mysql-test/r/partition_pruning.result b/mysql-test/r/partition_pruning.result index 4d48b70d26a..ec7fd798d4c 100644 --- a/mysql-test/r/partition_pruning.result +++ b/mysql-test/r/partition_pruning.result @@ -787,7 +787,7 @@ id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 pNULL,p2001-01-01 index a a 4 NULL 4 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a = '1999-02-31'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pNULL ref a a 4 const 1 Using where; Using index +1 SIMPLE t1 pNULL ref a a 4 const 1 Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a BETWEEN '0000-00-00' AND '1002-00-00'; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 pNULL,p0001-01-01,p1001-01-01,p2001-01-01 range a a 4 NULL 4 Using where; Using index @@ -1116,7 +1116,7 @@ id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p2001-01-01,pNULL index a a 4 NULL 4 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a = '1999-02-31'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pNULL ref a a 4 const 1 Using where; Using index +1 SIMPLE t1 pNULL ref a a 4 const 1 Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a BETWEEN '0000-00-00' AND '1002-00-00'; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02,p1001-01-01 range a a 4 NULL 4 Using where; Using index @@ -1445,7 +1445,7 @@ id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p2001-01-01,pNULL index a a 4 NULL 4 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a = '1999-02-31'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pNULL ref a a 4 const 1 Using where; Using index +1 SIMPLE t1 pNULL ref a a 4 const 1 Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a BETWEEN '0000-00-00' AND '1002-00-00'; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02,p1001-01-01 range a a 4 NULL 4 Using where; Using index diff --git a/mysql-test/r/type_date.result b/mysql-test/r/type_date.result index 41f590400ea..8a85cd53b2a 100644 --- a/mysql-test/r/type_date.result +++ b/mysql-test/r/type_date.result @@ -209,15 +209,11 @@ a SET SQL_MODE=TRADITIONAL; EXPLAIN SELECT * FROM t1 WHERE a = '0000-00-00'; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ref i i 4 const 1 Using where; Using index -Warnings: -Warning 1264 Out of range value for column 'a' at row 1 +1 SIMPLE t1 ref i i 4 const 1 Using index SELECT * FROM t1 WHERE a = '0000-00-00'; a 0000-00-00 0000-00-00 -Warnings: -Warning 1264 Out of range value for column 'a' at row 1 SELECT * FROM t2 WHERE a = '0000-00-00'; a 0000-00-00 @@ -242,15 +238,11 @@ a SET SQL_MODE=TRADITIONAL; EXPLAIN SELECT * FROM t1 WHERE a = '1000-00-00'; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ref i i 4 const 1 Using where; Using index -Warnings: -Warning 1265 Data truncated for column 'a' at row 1 +1 SIMPLE t1 ref i i 4 const 1 Using index SELECT * FROM t1 WHERE a = '1000-00-00'; a 1000-00-00 1000-00-00 -Warnings: -Warning 1265 Data truncated for column 'a' at row 1 SELECT * FROM t2 WHERE a = '1000-00-00'; a 1000-00-00 diff --git a/sql/opt_sum.cc b/sql/opt_sum.cc index cbec039b3e4..fa3a07b72c5 100644 --- a/sql/opt_sum.cc +++ b/sql/opt_sum.cc @@ -791,7 +791,7 @@ static bool matching_cond(bool max_fl, TABLE_REF *ref, KEY *keyinfo, { /* Update endpoints for MAX/MIN, see function comment. */ Item *value= args[between && max_fl ? 2 : 1]; - store_val_in_field(part->field, value, CHECK_FIELD_IGNORE); + value->save_in_field_no_warnings(part->field, 1); if (part->null_bit) *key_ptr++= (uchar) test(part->field->is_null()); part->field->get_key_image(key_ptr, part->length, Field::itRAW); diff --git a/sql/sql_select.cc b/sql/sql_select.cc index b1d1a84f5b2..0e5aa0e0aaa 100644 --- a/sql/sql_select.cc +++ b/sql/sql_select.cc @@ -8027,37 +8027,6 @@ get_store_key(THD *thd, KEYUSE *keyuse, table_map used_tables, keyuse->val, FALSE); } -/** - This function is only called for const items on fields which are keys. - - @return - returns 1 if there was some conversion made when the field was stored. -*/ - -bool -store_val_in_field(Field *field, Item *item, enum_check_fields check_flag) -{ - bool error; - TABLE *table= field->table; - THD *thd= table->in_use; - ha_rows cuted_fields=thd->cuted_fields; - my_bitmap_map *old_map= dbug_tmp_use_all_columns(table, - table->write_set); - - /* - we should restore old value of count_cuted_fields because - store_val_in_field can be called from mysql_insert - with select_insert, which make count_cuted_fields= 1 - */ - enum_check_fields old_count_cuted_fields= thd->count_cuted_fields; - thd->count_cuted_fields= check_flag; - error= item->save_in_field(field, 1); - thd->count_cuted_fields= old_count_cuted_fields; - dbug_tmp_restore_column_map(table->write_set, old_map); - return error || cuted_fields != thd->cuted_fields; -} - - /** @details Initialize a JOIN as a query execution plan that accesses a single table via a table scan. @@ -17698,7 +17667,7 @@ bool test_if_ref(Item *root_cond, Item_field *left_item,Item *right_item) field->real_type() != MYSQL_TYPE_VARCHAR && (field->type() != MYSQL_TYPE_FLOAT || field->decimals() == 0)) { - return !store_val_in_field(field, right_item, CHECK_FIELD_WARN); + return !right_item->save_in_field_no_warnings(field, 1); } } } diff --git a/sql/sql_select.h b/sql/sql_select.h index be5f523a7e2..118a684ab62 100644 --- a/sql/sql_select.h +++ b/sql/sql_select.h @@ -1430,7 +1430,6 @@ typedef struct st_select_check { extern const char *join_type_str[]; /* Extern functions in sql_select.cc */ -bool store_val_in_field(Field *field, Item *val, enum_check_fields check_flag); void count_field_types(SELECT_LEX *select_lex, TMP_TABLE_PARAM *param, List &fields, bool reset_with_sum_func); bool setup_copy_fields(THD *thd, TMP_TABLE_PARAM *param, @@ -1504,6 +1503,7 @@ public: enum_check_fields saved_count_cuted_fields= thd->count_cuted_fields; ulonglong sql_mode= thd->variables.sql_mode; thd->variables.sql_mode&= ~(MODE_NO_ZERO_IN_DATE | MODE_NO_ZERO_DATE); + thd->variables.sql_mode|= MODE_INVALID_DATES; thd->count_cuted_fields= CHECK_FIELD_IGNORE; From 01ef1f0d7964b1f4c0adff290c406f7d8bd0237e Mon Sep 17 00:00:00 2001 From: Sergei Golubchik Date: Fri, 31 Aug 2012 16:48:02 +0200 Subject: [PATCH 148/164] fix the test to work with --lower-case-table-names=1 --- mysql-test/suite/rpl/r/rpl_mdev382.result | 82 +++++++++++------------ mysql-test/suite/rpl/t/rpl_mdev382.test | 34 +++++----- 2 files changed, 58 insertions(+), 58 deletions(-) diff --git a/mysql-test/suite/rpl/r/rpl_mdev382.result b/mysql-test/suite/rpl/r/rpl_mdev382.result index 50da7e67bba..b564dd8401e 100644 --- a/mysql-test/suite/rpl/r/rpl_mdev382.result +++ b/mysql-test/suite/rpl/r/rpl_mdev382.result @@ -77,8 +77,8 @@ master-bin.000001 # Query # # use `test`; insert into t1 values(18) master-bin.000001 # Xid # # COMMIT /* XID */ *** Test correct USE statement in SHOW BINLOG EVENTS *** set sql_mode = 'ANSI_QUOTES'; -CREATE DATABASE "db1`; SELECT 'oops!'"; -use "db1`; SELECT 'oops!'"; +CREATE DATABASE "db1`; select 'oops!'"; +use "db1`; select 'oops!'"; CREATE TABLE t1 (a INT PRIMARY KEY) engine=MyISAM; INSERT INTO t1 VALUES (1); set sql_mode = ''; @@ -86,41 +86,41 @@ INSERT INTO t1 VALUES (2); set sql_mode = 'ANSI_QUOTES'; show binlog events from ; Log_name Pos Event_type Server_id End_log_pos Info -master-bin.000001 # Query # # CREATE DATABASE "db1`; SELECT 'oops!'" -master-bin.000001 # Query # # use "db1`; SELECT 'oops!'"; CREATE TABLE t1 (a INT PRIMARY KEY) engine=MyISAM +master-bin.000001 # Query # # CREATE DATABASE "db1`; select 'oops!'" +master-bin.000001 # Query # # use "db1`; select 'oops!'"; CREATE TABLE t1 (a INT PRIMARY KEY) engine=MyISAM master-bin.000001 # Query # # BEGIN -master-bin.000001 # Query # # use "db1`; SELECT 'oops!'"; INSERT INTO t1 VALUES (1) +master-bin.000001 # Query # # use "db1`; select 'oops!'"; INSERT INTO t1 VALUES (1) master-bin.000001 # Query # # COMMIT master-bin.000001 # Query # # BEGIN -master-bin.000001 # Query # # use "db1`; SELECT 'oops!'"; INSERT INTO t1 VALUES (2) +master-bin.000001 # Query # # use "db1`; select 'oops!'"; INSERT INTO t1 VALUES (2) master-bin.000001 # Query # # COMMIT set sql_mode = ''; set sql_quote_show_create = 0; show binlog events from ; Log_name Pos Event_type Server_id End_log_pos Info -master-bin.000001 # Query # # CREATE DATABASE "db1`; SELECT 'oops!'" -master-bin.000001 # Query # # use `db1``; SELECT 'oops!'`; CREATE TABLE t1 (a INT PRIMARY KEY) engine=MyISAM +master-bin.000001 # Query # # CREATE DATABASE "db1`; select 'oops!'" +master-bin.000001 # Query # # use `db1``; select 'oops!'`; CREATE TABLE t1 (a INT PRIMARY KEY) engine=MyISAM master-bin.000001 # Query # # BEGIN -master-bin.000001 # Query # # use `db1``; SELECT 'oops!'`; INSERT INTO t1 VALUES (1) +master-bin.000001 # Query # # use `db1``; select 'oops!'`; INSERT INTO t1 VALUES (1) master-bin.000001 # Query # # COMMIT master-bin.000001 # Query # # BEGIN -master-bin.000001 # Query # # use `db1``; SELECT 'oops!'`; INSERT INTO t1 VALUES (2) +master-bin.000001 # Query # # use `db1``; select 'oops!'`; INSERT INTO t1 VALUES (2) master-bin.000001 # Query # # COMMIT set sql_quote_show_create = 1; show binlog events from ; Log_name Pos Event_type Server_id End_log_pos Info -master-bin.000001 # Query # # CREATE DATABASE "db1`; SELECT 'oops!'" -master-bin.000001 # Query # # use `db1``; SELECT 'oops!'`; CREATE TABLE t1 (a INT PRIMARY KEY) engine=MyISAM +master-bin.000001 # Query # # CREATE DATABASE "db1`; select 'oops!'" +master-bin.000001 # Query # # use `db1``; select 'oops!'`; CREATE TABLE t1 (a INT PRIMARY KEY) engine=MyISAM master-bin.000001 # Query # # BEGIN -master-bin.000001 # Query # # use `db1``; SELECT 'oops!'`; INSERT INTO t1 VALUES (1) +master-bin.000001 # Query # # use `db1``; select 'oops!'`; INSERT INTO t1 VALUES (1) master-bin.000001 # Query # # COMMIT master-bin.000001 # Query # # BEGIN -master-bin.000001 # Query # # use `db1``; SELECT 'oops!'`; INSERT INTO t1 VALUES (2) +master-bin.000001 # Query # # use `db1``; select 'oops!'`; INSERT INTO t1 VALUES (2) master-bin.000001 # Query # # COMMIT DROP TABLE t1; use test; ***Test LOAD DATA INFILE with various identifiers that need correct quoting *** -use `db1``; SELECT 'oops!'`; +use `db1``; select 'oops!'`; set timestamp=1000000000; CREATE TABLE `t``1` (`a``1` VARCHAR(4) PRIMARY KEY, `b``2` VARCHAR(3), `c``3` VARCHAR(7)); @@ -134,31 +134,31 @@ fo\o bar |b"a'z! truncate `t``1`; use test; LOAD DATA INFILE 'MYSQLTEST_VARDIR/tmp/f''le.txt' - INTO TABLE `db1``; SELECT 'oops!'`.`t``1` + INTO TABLE `db1``; select 'oops!'`.`t``1` FIELDS TERMINATED BY ',' ESCAPED BY '\\' ENCLOSED BY '''' LINES TERMINATED BY '\n' (`a``1`, `b``2`) SET `c``3` = concat('|', "b""a'z", "!"); -SELECT * FROM `db1``; SELECT 'oops!'`.`t``1`; +SELECT * FROM `db1``; select 'oops!'`.`t``1`; a`1 b`2 c`3 fo\o bar |b"a'z! show binlog events from ; Log_name Pos Event_type Server_id End_log_pos Info -master-bin.000001 # Query # # use `db1``; SELECT 'oops!'`; CREATE TABLE `t``1` (`a``1` VARCHAR(4) PRIMARY KEY, `b``2` VARCHAR(3), +master-bin.000001 # Query # # use `db1``; select 'oops!'`; CREATE TABLE `t``1` (`a``1` VARCHAR(4) PRIMARY KEY, `b``2` VARCHAR(3), `c``3` VARCHAR(7)) master-bin.000001 # Query # # BEGIN master-bin.000001 # Begin_load_query # # ;file_id=#;block_len=# -master-bin.000001 # Execute_load_query # # use `db1``; SELECT 'oops!'`; LOAD DATA INFILE 'MYSQLTEST_VARDIR/tmp/f\'le.txt' INTO TABLE `t``1` FIELDS TERMINATED BY ',' ENCLOSED BY '\'' ESCAPED BY '\\' LINES TERMINATED BY '\n' (`a``1`, @`b```) SET `b``2`= @`b```, `c``3`= concat('|', "b""a'z", "!") ;file_id=# +master-bin.000001 # Execute_load_query # # use `db1``; select 'oops!'`; LOAD DATA INFILE 'MYSQLTEST_VARDIR/tmp/f\'le.txt' INTO TABLE `t``1` FIELDS TERMINATED BY ',' ENCLOSED BY '\'' ESCAPED BY '\\' LINES TERMINATED BY '\n' (`a``1`, @`b```) SET `b``2`= @`b```, `c``3`= concat('|', "b""a'z", "!") ;file_id=# master-bin.000001 # Query # # COMMIT -master-bin.000001 # Query # # use `db1``; SELECT 'oops!'`; truncate `t``1` +master-bin.000001 # Query # # use `db1``; select 'oops!'`; truncate `t``1` master-bin.000001 # Query # # BEGIN master-bin.000001 # Begin_load_query # # ;file_id=#;block_len=# -master-bin.000001 # Execute_load_query # # use `test`; LOAD DATA INFILE 'MYSQLTEST_VARDIR/tmp/f\'le.txt' INTO TABLE `db1``; SELECT 'oops!'`.`t``1` FIELDS TERMINATED BY ',' ENCLOSED BY '\'' ESCAPED BY '\\' LINES TERMINATED BY '\n' (`a``1`, `b``2`) SET `c``3`= concat('|', "b""a'z", "!") ;file_id=# +master-bin.000001 # Execute_load_query # # use `test`; LOAD DATA INFILE 'MYSQLTEST_VARDIR/tmp/f\'le.txt' INTO TABLE `db1``; select 'oops!'`.`t``1` FIELDS TERMINATED BY ',' ENCLOSED BY '\'' ESCAPED BY '\\' LINES TERMINATED BY '\n' (`a``1`, `b``2`) SET `c``3`= concat('|', "b""a'z", "!") ;file_id=# master-bin.000001 # Query # # COMMIT /*!40019 SET @@session.max_insert_delayed_threads=0*/; /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; DELIMITER /*!*/; ROLLBACK/*!*/; -use `db1``; SELECT 'oops!'`/*!*/; +use `db1``; select 'oops!'`/*!*/; SET TIMESTAMP=1000000000/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -188,7 +188,7 @@ BEGIN /*!*/; use `test`/*!*/; SET TIMESTAMP=1000000000/*!*/; -LOAD DATA LOCAL INFILE '' INTO TABLE `db1``; SELECT 'oops!'`.`t``1` FIELDS TERMINATED BY ',' ENCLOSED BY '\'' ESCAPED BY '\\' LINES TERMINATED BY '\n' (`a``1`, `b``2`) SET `c``3`= concat('|', "b""a'z", "!") +LOAD DATA LOCAL INFILE '' INTO TABLE `db1``; select 'oops!'`.`t``1` FIELDS TERMINATED BY ',' ENCLOSED BY '\'' ESCAPED BY '\\' LINES TERMINATED BY '\n' (`a``1`, `b``2`) SET `c``3`= concat('|', "b""a'z", "!") /*!*/; SET TIMESTAMP=1000000000/*!*/; COMMIT @@ -197,10 +197,10 @@ DELIMITER ; # End of log file ROLLBACK /* added by mysqlbinlog */; /*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/; -SELECT * FROM `db1``; SELECT 'oops!'`.`t``1`; +SELECT * FROM `db1``; select 'oops!'`.`t``1`; a`1 b`2 c`3 fo\o bar |b"a'z! -DROP TABLE `db1``; SELECT 'oops!'`.`t``1`; +DROP TABLE `db1``; select 'oops!'`.`t``1`; drop table t1,t2; *** Test truncation of long SET expression in LOAD DATA *** CREATE TABLE t1 (a INT PRIMARY KEY, b VARCHAR(1000)); @@ -223,7 +223,7 @@ a b 2 A| 123456789A123456789B123456789C123456789D123456789E123456789F123456789G123456789H123456789I123456789J123456789K123456789L123456789M123456789N123456789O123456789P123456789Q123456789R123456789123456789T123456789U123456789V123456789W123456789X123456789Y123456789Z123456789|A DROP TABLE t1; *** Test user variables whose names require correct quoting *** -use `db1``; SELECT 'oops!'`; +use `db1``; select 'oops!'`; CREATE TABLE t1 (a1 BIGINT PRIMARY KEY, a2 BIGINT, a3 BIGINT, a4 BIGINT UNSIGNED, b DOUBLE, c DECIMAL(65,10), d VARCHAR(100)); INSERT INTO t1 VALUES (-9223372036854775808,42,9223372036854775807,18446744073709551615,-1234560123456789e110, -1234501234567890123456789012345678901234567890123456789.0123456789, REPEAT("x", 100)); SELECT @`a``1`:=a1, @`a``2`:=a2, @`a``3`:=a3, @`a``4`:=a4, @`b```:=b, @```c`:=c, @```d```:=d FROM t1; @@ -232,9 +232,9 @@ SELECT @`a``1`:=a1, @`a``2`:=a2, @`a``3`:=a3, @`a``4`:=a4, @`b```:=b, @```c`:=c, INSERT INTO t1 VALUES (@`a``1`+1, @`a``2`*100, @`a``3`-1, @`a``4`-1, @`b```/2, @```c`, substr(@```d```, 2, 98)); show binlog events from ; Log_name Pos Event_type Server_id End_log_pos Info -master-bin.000001 # Query # # use `db1``; SELECT 'oops!'`; CREATE TABLE t1 (a1 BIGINT PRIMARY KEY, a2 BIGINT, a3 BIGINT, a4 BIGINT UNSIGNED, b DOUBLE, c DECIMAL(65,10), d VARCHAR(100)) +master-bin.000001 # Query # # use `db1``; select 'oops!'`; CREATE TABLE t1 (a1 BIGINT PRIMARY KEY, a2 BIGINT, a3 BIGINT, a4 BIGINT UNSIGNED, b DOUBLE, c DECIMAL(65,10), d VARCHAR(100)) master-bin.000001 # Query # # BEGIN -master-bin.000001 # Query # # use `db1``; SELECT 'oops!'`; INSERT INTO t1 VALUES (-9223372036854775808,42,9223372036854775807,18446744073709551615,-1234560123456789e110, -1234501234567890123456789012345678901234567890123456789.0123456789, REPEAT("x", 100)) +master-bin.000001 # Query # # use `db1``; select 'oops!'`; INSERT INTO t1 VALUES (-9223372036854775808,42,9223372036854775807,18446744073709551615,-1234560123456789e110, -1234501234567890123456789012345678901234567890123456789.0123456789, REPEAT("x", 100)) master-bin.000001 # Query # # COMMIT master-bin.000001 # Query # # BEGIN master-bin.000001 # User var # # @`a``1`=-9223372036854775808 @@ -244,13 +244,13 @@ master-bin.000001 # User var # # @`a``4`=18446744073709551615 master-bin.000001 # User var # # @`b```=-1.234560123456789e125 master-bin.000001 # User var # # @```c`=-1234501234567890123456789012345678901234567890123456789.0123456789 master-bin.000001 # User var # # @```d```=_latin1 0x78787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878787878 COLLATE latin1_swedish_ci -master-bin.000001 # Query # # use `db1``; SELECT 'oops!'`; INSERT INTO t1 VALUES (@`a``1`+1, @`a``2`*100, @`a``3`-1, @`a``4`-1, @`b```/2, @```c`, substr(@```d```, 2, 98)) +master-bin.000001 # Query # # use `db1``; select 'oops!'`; INSERT INTO t1 VALUES (@`a``1`+1, @`a``2`*100, @`a``3`-1, @`a``4`-1, @`b```/2, @```c`, substr(@```d```, 2, 98)) master-bin.000001 # Query # # COMMIT /*!40019 SET @@session.max_insert_delayed_threads=0*/; /*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; DELIMITER /*!*/; ROLLBACK/*!*/; -use `db1``; SELECT 'oops!'`/*!*/; +use `db1``; select 'oops!'`/*!*/; SET TIMESTAMP=1000000000/*!*/; SET @@session.pseudo_thread_id=999999999/*!*/; SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/; @@ -291,46 +291,46 @@ DELIMITER ; # End of log file ROLLBACK /* added by mysqlbinlog */; /*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/; -SELECT * FROM `db1``; SELECT 'oops!'`.t1 ORDER BY a1; +SELECT * FROM `db1``; select 'oops!'`.t1 ORDER BY a1; a1 a2 a3 a4 b c d -9223372036854775808 42 9223372036854775807 18446744073709551615 -1.234560123456789e125 -1234501234567890123456789012345678901234567890123456789.0123456789 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx -9223372036854775807 4200 9223372036854775806 18446744073709551614 -6.172800617283945e124 -1234501234567890123456789012345678901234567890123456789.0123456789 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx DROP TABLE t1; *** Test correct quoting in foreign key error message *** -use `db1``; SELECT 'oops!'`; +use `db1``; select 'oops!'`; CREATE TABLE `t``1` ( `a``` INT PRIMARY KEY) ENGINE=innodb; CREATE TABLE `t``2` ( `b``` INT PRIMARY KEY, `c``` INT NOT NULL, FOREIGN KEY fk (`c```) REFERENCES `t``1`(`a```)) ENGINE=innodb; TRUNCATE `t``1`; -ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`db1``; SELECT 'oops!'`.`t``2`, CONSTRAINT `INNODB_FOREIGN_KEY_NAME` FOREIGN KEY (`c```) REFERENCES `db1``; SELECT 'oops!'`.`t``1` (`a```)) +ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`db1``; select 'oops!'`.`t``2`, CONSTRAINT `INNODB_FOREIGN_KEY_NAME` FOREIGN KEY (`c```) REFERENCES `db1``; select 'oops!'`.`t``1` (`a```)) DROP TABLE `t``2`; DROP TABLE `t``1`; *** Test correct quoting of DELETE FROM statement binlogged for HEAP table that is emptied due to server restart include/stop_slave.inc -CREATE TABLE `db1``; SELECT 'oops!'`.`t``1` (`a``` INT PRIMARY KEY) ENGINE=heap; -INSERT INTO `db1``; SELECT 'oops!'`.`t``1` VALUES (1), (2), (5); -SELECT * FROM `db1``; SELECT 'oops!'`.`t``1` ORDER BY 1; +CREATE TABLE `db1``; select 'oops!'`.`t``1` (`a``` INT PRIMARY KEY) ENGINE=heap; +INSERT INTO `db1``; select 'oops!'`.`t``1` VALUES (1), (2), (5); +SELECT * FROM `db1``; select 'oops!'`.`t``1` ORDER BY 1; a` 1 2 5 set timestamp=1000000000; # The table should be empty on the master. -SELECT * FROM `db1``; SELECT 'oops!'`.`t``1`; +SELECT * FROM `db1``; select 'oops!'`.`t``1`; a` # The DELETE statement should be correctly quoted show binlog events in 'master-bin.000002' from ; Log_name Pos Event_type Server_id End_log_pos Info master-bin.000002 # Query # # BEGIN -master-bin.000002 # Query # # use `test`; DELETE FROM `db1``; SELECT 'oops!'`.`t``1` +master-bin.000002 # Query # # use `test`; DELETE FROM `db1``; select 'oops!'`.`t``1` master-bin.000002 # Query # # COMMIT include/start_slave.inc # The table should be empty on the slave also. -SELECT * FROM `db1``; SELECT 'oops!'`.`t``1`; +SELECT * FROM `db1``; select 'oops!'`.`t``1`; a` -DROP TABLE `db1``; SELECT 'oops!'`.`t``1`; +DROP TABLE `db1``; select 'oops!'`.`t``1`; use test; -DROP DATABASE `db1``; SELECT 'oops!'`; +DROP DATABASE `db1``; select 'oops!'`; *** Test correct quoting of mysqlbinlog --rewrite-db option *** CREATE TABLE t1 (a INT PRIMARY KEY); INSERT INTO t1 VALUES(1); diff --git a/mysql-test/suite/rpl/t/rpl_mdev382.test b/mysql-test/suite/rpl/t/rpl_mdev382.test index e84a29137bc..d88eeaa463e 100644 --- a/mysql-test/suite/rpl/t/rpl_mdev382.test +++ b/mysql-test/suite/rpl/t/rpl_mdev382.test @@ -64,8 +64,8 @@ set sql_quote_show_create = 1; connection master; let $binlog_start= query_get_value(SHOW MASTER STATUS, Position, 1); set sql_mode = 'ANSI_QUOTES'; -CREATE DATABASE "db1`; SELECT 'oops!'"; -use "db1`; SELECT 'oops!'"; +CREATE DATABASE "db1`; select 'oops!'"; +use "db1`; select 'oops!'"; CREATE TABLE t1 (a INT PRIMARY KEY) engine=MyISAM; INSERT INTO t1 VALUES (1); set sql_mode = ''; @@ -88,7 +88,7 @@ use test; 'fo\\o','bar' EOF -use `db1``; SELECT 'oops!'`; +use `db1``; select 'oops!'`; let $binlog_start= query_get_value(SHOW MASTER STATUS, Position, 1); set timestamp=1000000000; CREATE TABLE `t``1` (`a``1` VARCHAR(4) PRIMARY KEY, `b``2` VARCHAR(3), @@ -105,11 +105,11 @@ truncate `t``1`; use test; --replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR eval LOAD DATA INFILE '$MYSQLTEST_VARDIR/tmp/f''le.txt' - INTO TABLE `db1``; SELECT 'oops!'`.`t``1` + INTO TABLE `db1``; select 'oops!'`.`t``1` FIELDS TERMINATED BY ',' ESCAPED BY '\\\\' ENCLOSED BY '''' LINES TERMINATED BY '\\n' (`a``1`, `b``2`) SET `c``3` = concat('|', "b""a'z", "!"); -SELECT * FROM `db1``; SELECT 'oops!'`.`t``1`; +SELECT * FROM `db1``; select 'oops!'`.`t``1`; let $pos2= query_get_value(SHOW MASTER STATUS, Position, 1); --source include/show_binlog_events.inc @@ -119,10 +119,10 @@ let $MYSQLD_DATADIR= `select @@datadir`; sync_slave_with_master; connection slave; -SELECT * FROM `db1``; SELECT 'oops!'`.`t``1`; +SELECT * FROM `db1``; select 'oops!'`.`t``1`; connection master; -DROP TABLE `db1``; SELECT 'oops!'`.`t``1`; +DROP TABLE `db1``; select 'oops!'`.`t``1`; --remove_file $load_file connection master; @@ -158,7 +158,7 @@ DROP TABLE t1; --echo *** Test user variables whose names require correct quoting *** -use `db1``; SELECT 'oops!'`; +use `db1``; select 'oops!'`; let $binlog_start= query_get_value(SHOW MASTER STATUS, Position, 1); CREATE TABLE t1 (a1 BIGINT PRIMARY KEY, a2 BIGINT, a3 BIGINT, a4 BIGINT UNSIGNED, b DOUBLE, c DECIMAL(65,10), d VARCHAR(100)); INSERT INTO t1 VALUES (-9223372036854775808,42,9223372036854775807,18446744073709551615,-1234560123456789e110, -1234501234567890123456789012345678901234567890123456789.0123456789, REPEAT("x", 100)); @@ -172,13 +172,13 @@ let $pos2= query_get_value(SHOW MASTER STATUS, Position, 1); sync_slave_with_master; connection slave; -SELECT * FROM `db1``; SELECT 'oops!'`.t1 ORDER BY a1; +SELECT * FROM `db1``; select 'oops!'`.t1 ORDER BY a1; connection master; DROP TABLE t1; --echo *** Test correct quoting in foreign key error message *** -use `db1``; SELECT 'oops!'`; +use `db1``; select 'oops!'`; CREATE TABLE `t``1` ( `a``` INT PRIMARY KEY) ENGINE=innodb; CREATE TABLE `t``2` ( `b``` INT PRIMARY KEY, `c``` INT NOT NULL, FOREIGN KEY fk (`c```) REFERENCES `t``1`(`a```)) ENGINE=innodb; @@ -197,9 +197,9 @@ connection slave; --source include/stop_slave.inc connection master; -CREATE TABLE `db1``; SELECT 'oops!'`.`t``1` (`a``` INT PRIMARY KEY) ENGINE=heap; -INSERT INTO `db1``; SELECT 'oops!'`.`t``1` VALUES (1), (2), (5); -SELECT * FROM `db1``; SELECT 'oops!'`.`t``1` ORDER BY 1; +CREATE TABLE `db1``; select 'oops!'`.`t``1` (`a``` INT PRIMARY KEY) ENGINE=heap; +INSERT INTO `db1``; select 'oops!'`.`t``1` VALUES (1), (2), (5); +SELECT * FROM `db1``; select 'oops!'`.`t``1` ORDER BY 1; # Restart the master mysqld. # This will cause an implicit truncation of the memory-based table, which will @@ -230,7 +230,7 @@ set timestamp=1000000000; --echo # The table should be empty on the master. let $binlog_file= master-bin.000002; let $binlog_start= query_get_value(SHOW MASTER STATUS, Position, 1); -SELECT * FROM `db1``; SELECT 'oops!'`.`t``1`; +SELECT * FROM `db1``; select 'oops!'`.`t``1`; --echo # The DELETE statement should be correctly quoted --source include/show_binlog_events.inc @@ -242,16 +242,16 @@ connection master; sync_slave_with_master; connection slave; --echo # The table should be empty on the slave also. -SELECT * FROM `db1``; SELECT 'oops!'`.`t``1`; +SELECT * FROM `db1``; select 'oops!'`.`t``1`; connection master; -DROP TABLE `db1``; SELECT 'oops!'`.`t``1`; +DROP TABLE `db1``; select 'oops!'`.`t``1`; sync_slave_with_master; connection master; use test; -DROP DATABASE `db1``; SELECT 'oops!'`; +DROP DATABASE `db1``; select 'oops!'`; --echo *** Test correct quoting of mysqlbinlog --rewrite-db option *** CREATE TABLE t1 (a INT PRIMARY KEY); From 589c62fefec759a467b6dec1badb2cd283564845 Mon Sep 17 00:00:00 2001 From: Alexey Botchkov Date: Fri, 31 Aug 2012 19:50:45 +0500 Subject: [PATCH 149/164] Bug #1043845 st_distance() results are incorrect depending on variable order. Autointersections of an object were treated as nodes, so the wrong result. per-file comments: mysql-test/r/gis.result Bug #1043845 st_distance() results are incorrect depending on variable order. test result updated. mysql-test/t/gis.test Bug #1043845 st_distance() results are incorrect depending on variable order. test case added. sql/item.cc small fix to make compilers happy. sql/item_geofunc.cc Bug #1043845 st_distance() results are incorrect depending on variable order. Skip intersection points when calculate distance. --- mysql-test/r/gis.result | 23 +++++++++++++++++++++++ mysql-test/t/gis.test | 16 ++++++++++++++++ sql/item.cc | 2 +- sql/item_geofunc.cc | 3 ++- 4 files changed, 42 insertions(+), 2 deletions(-) diff --git a/mysql-test/r/gis.result b/mysql-test/r/gis.result index eab28b23550..f29d096fc57 100644 --- a/mysql-test/r/gis.result +++ b/mysql-test/r/gis.result @@ -1473,3 +1473,26 @@ WHERE ST_Contains(ST_Buffer(bridges.position, 15.0), buildings.footprint) = 1; count(*) 1 DROP DATABASE gis_ogs; +# +# BUG #1043845 st_distance() results are incorrect depending on variable order +# +select st_distance(geomfromtext('LINESTRING(-95.9673005697771 36.13509598461, + -95.9673057475387 36.1344478941074, + -95.9673063519371 36.134484524621, + -95.9673049102515 36.1343976584193)'), +geomfromtext('point(-95.96269500000000000000 36.14181833333330000000)')) ; +st_distance(geomfromtext('LINESTRING(-95.9673005697771 36.13509598461, + -95.9673057475387 36.1344478941074, + -95.9673063519371 36.134484524621, + +0.008148695928138 +select st_distance(geomfromtext('point(-95.96269500000000000000 36.14181833333330000000)'), +geomfromtext('LINESTRING(-95.9673005697771 36.13509598461, + -95.9673057475387 36.1344478941074, + -95.9673063519371 36.134484524621, + -95.9673049102515 36.1343976584193) ')) ; +st_distance(geomfromtext('point(-95.96269500000000000000 36.14181833333330000000)'), +geomfromtext('LINESTRING(-95.9673005697771 36.13509598461, + -95.9673057475387 36.1344478941074, + -95.9673063519371 36. +0.008148695928138 diff --git a/mysql-test/t/gis.test b/mysql-test/t/gis.test index 95b1e63b828..cdbc253869e 100644 --- a/mysql-test/t/gis.test +++ b/mysql-test/t/gis.test @@ -1355,3 +1355,19 @@ WHERE ST_Contains(ST_Buffer(bridges.position, 15.0), buildings.footprint) = 1; #WHERE lakes.name = 'Blue Lake'; DROP DATABASE gis_ogs; + +--echo # +--echo # BUG #1043845 st_distance() results are incorrect depending on variable order +--echo # + +select st_distance(geomfromtext('LINESTRING(-95.9673005697771 36.13509598461, + -95.9673057475387 36.1344478941074, + -95.9673063519371 36.134484524621, + -95.9673049102515 36.1343976584193)'), + geomfromtext('point(-95.96269500000000000000 36.14181833333330000000)')) ; +select st_distance(geomfromtext('point(-95.96269500000000000000 36.14181833333330000000)'), + geomfromtext('LINESTRING(-95.9673005697771 36.13509598461, + -95.9673057475387 36.1344478941074, + -95.9673063519371 36.134484524621, + -95.9673049102515 36.1343976584193) ')) ; + diff --git a/sql/item.cc b/sql/item.cc index e125e57d2fc..bb6360f3f73 100644 --- a/sql/item.cc +++ b/sql/item.cc @@ -8858,7 +8858,7 @@ bool Item_type_holder::join_types(THD *thd, Item *item) item->max_length, item->decimals)); fld_type= Field::field_type_merge(fld_type, get_real_type(item)); { - int item_decimals= item->decimals; + uint item_decimals= item->decimals; /* fix variable decimals which always is NOT_FIXED_DEC */ if (Field::result_merge_type(fld_type) == INT_RESULT) item_decimals= 0; diff --git a/sql/item_geofunc.cc b/sql/item_geofunc.cc index 172e0cbcd1f..522be28558f 100644 --- a/sql/item_geofunc.cc +++ b/sql/item_geofunc.cc @@ -1693,7 +1693,8 @@ count_distance: for (dist_point= collector.get_first(); dist_point; dist_point= dist_point->get_next()) { /* We only check vertices of object 2 */ - if (dist_point->shape < obj2_si) + if (dist_point->type != Gcalc_heap::nt_shape_node || + dist_point->shape < obj2_si) continue; /* if we have an edge to check */ From 4a8938f6f515a43fe2ba5e997c54982991f48f12 Mon Sep 17 00:00:00 2001 From: Sergei Golubchik Date: Sat, 1 Sep 2012 00:23:30 +0200 Subject: [PATCH 150/164] remove the forgotten commented out piece of the old merge --- sql/sql_select.cc | 5 ----- 1 file changed, 5 deletions(-) diff --git a/sql/sql_select.cc b/sql/sql_select.cc index 0e5aa0e0aaa..57bb9a311d7 100644 --- a/sql/sql_select.cc +++ b/sql/sql_select.cc @@ -21549,11 +21549,6 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order, length= (longlong10_to_str(key_len, keylen_str_buf, 10) - keylen_str_buf); tmp3.append(keylen_str_buf, length, cs); -/*<<<<<<< TREE - } - if ((is_hj || tab->type==JT_RANGE || tab->type == JT_INDEX_MERGE) && - tab->select && tab->select->quick) -=======*/ } if (tab->type != JT_CONST && tab->select && tab->select->quick) tab->select->quick->add_keys_and_lengths(&tmp2, &tmp3); From 5620937c058aa9f7cd3b122b40f8b9c94fa69997 Mon Sep 17 00:00:00 2001 From: Sergei Golubchik Date: Sun, 2 Sep 2012 19:09:17 +0200 Subject: [PATCH 151/164] don't run mdev375.test for embedded server --- mysql-test/t/mdev375.test | 2 ++ 1 file changed, 2 insertions(+) diff --git a/mysql-test/t/mdev375.test b/mysql-test/t/mdev375.test index 547d57aa587..fe259b37808 100644 --- a/mysql-test/t/mdev375.test +++ b/mysql-test/t/mdev375.test @@ -1,6 +1,8 @@ # # MDEV-375 Server crashes in THD::print_aborted_warning with log_warnings > 3 # +--source include/not_embedded.inc + SET GLOBAL log_warnings=4; SET GLOBAL max_connections=2; From 0b5564b86c29d00ed3b28c9112d09214ea266d23 Mon Sep 17 00:00:00 2001 From: Sergei Golubchik Date: Tue, 4 Sep 2012 12:12:28 +0200 Subject: [PATCH 152/164] 1. fix an old typo. A purgatory must be cleaned on every LF_PURGATORY_SIZE freeing, not every time. 2. Increase purgatory size. include/lf.h: allocate larger purgatory mysys/lf_alloc-pin.c: typo. --- include/lf.h | 2 +- mysys/lf_alloc-pin.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/include/lf.h b/include/lf.h index cdd24c07502..07769d10943 100644 --- a/include/lf.h +++ b/include/lf.h @@ -95,7 +95,7 @@ nolock_wrap(lf_dynarray_iterate, int, */ #define LF_PINBOX_PINS 4 -#define LF_PURGATORY_SIZE 10 +#define LF_PURGATORY_SIZE 100 typedef void lf_pinbox_free_func(void *, void *, void*); diff --git a/mysys/lf_alloc-pin.c b/mysys/lf_alloc-pin.c index d23ef129aa2..6ab6ba3aae0 100644 --- a/mysys/lf_alloc-pin.c +++ b/mysys/lf_alloc-pin.c @@ -271,7 +271,7 @@ static int ptr_cmp(void **a, void **b) void _lf_pinbox_free(LF_PINS *pins, void *addr) { add_to_purgatory(pins, addr); - if (pins->purgatory_count % LF_PURGATORY_SIZE) + if (pins->purgatory_count % LF_PURGATORY_SIZE == 0) _lf_pinbox_real_free(pins); } From 1f92707978d411a051b2bfa46ed361f60861ff73 Mon Sep 17 00:00:00 2001 From: Sergei Golubchik Date: Tue, 4 Sep 2012 19:11:06 +0200 Subject: [PATCH 153/164] MDEV-481 Assertion `pins->pin[i] == 0' failed in _lf_pinbox_put_pins on concurrent OPTIMIZE TABLE and DML with Aria tables A bug in the lock-free hash implementation! when lsearch() has not found the key, the caller needs to unpin all the three pins, because lsearch() was using all the three. --- mysys/lf_hash.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/mysys/lf_hash.c b/mysys/lf_hash.c index 83cfe1a1639..38b212c65f0 100644 --- a/mysys/lf_hash.c +++ b/mysys/lf_hash.c @@ -268,8 +268,10 @@ static LF_SLIST *lsearch(LF_SLIST * volatile *head, CHARSET_INFO *cs, int res= lfind(head, cs, hashnr, key, keylen, &cursor, pins); if (res) _lf_pin(pins, 2, cursor.curr); - _lf_unpin(pins, 0); + else + _lf_unpin(pins, 2); _lf_unpin(pins, 1); + _lf_unpin(pins, 0); return res ? cursor.curr : 0; } From 0352f09a2e3e17470ab75678265b98a275cb25a0 Mon Sep 17 00:00:00 2001 From: Sergei Golubchik Date: Wed, 5 Sep 2012 10:44:23 +0200 Subject: [PATCH 154/164] Percona-Server-5.5.27-rel28.1 --- btr/btr0btr.c | 4 + buf/buf0buf.c | 11 +- buf/buf0lru.c | 51 +++++--- buf/buf0rea.c | 47 +++++++- dict/dict0dict.c | 42 +++++-- dict/dict0mem.c | 4 +- fil/fil0fil.c | 2 + ha/ha0ha.c | 16 +-- handler/ha_innodb.cc | 51 ++++++-- handler/handler0alter.cc | 18 +-- handler/i_s.cc | 245 +++++++++++++++++++++++++++++++++++++++ handler/i_s.h | 1 + include/btr0btr.h | 3 + include/btr0types.h | 4 + include/buf0buf.h | 21 ++-- include/buf0buf.ic | 2 + include/dict0dict.h | 5 +- include/dict0dict.ic | 2 + include/ha_prototypes.h | 11 ++ include/log0log.h | 2 +- include/os0file.h | 2 +- include/srv0srv.h | 2 +- include/trx0sys.h | 4 +- mem/mem0dbg.c | 4 +- os/os0file.c | 2 + page/page0zip.c | 2 + row/row0ins.c | 6 +- row/row0merge.c | 188 +++++++++++++++++++----------- row/row0vers.c | 11 -- trx/trx0sys.c | 2 +- ut/ut0dbg.c | 6 +- ut/ut0ut.c | 8 ++ 32 files changed, 614 insertions(+), 165 deletions(-) diff --git a/btr/btr0btr.c b/btr/btr0btr.c index 1fa6df44f7c..53f2be4cabd 100644 --- a/btr/btr0btr.c +++ b/btr/btr0btr.c @@ -42,6 +42,7 @@ Created 6/2/1994 Heikki Tuuri #include "ibuf0ibuf.h" #include "trx0trx.h" +#endif /* UNIV_HOTBACKUP */ /**************************************************************//** Report that an index page is corrupted. */ UNIV_INTERN @@ -64,6 +65,7 @@ btr_corruption_report( buf_page_print(buf_block_get_frame(block), 0, 0); } +#ifndef UNIV_HOTBACKUP #ifdef UNIV_BLOB_DEBUG # include "srv0srv.h" # include "ut0rbt.h" @@ -1622,7 +1624,9 @@ btr_page_reorganize_low( dict_index_t* index, /*!< in: record descriptor */ mtr_t* mtr) /*!< in: mtr */ { +#ifndef UNIV_HOTBACKUP buf_pool_t* buf_pool = buf_pool_from_bpage(&block->page); +#endif /* !UNIV_HOTBACKUP */ page_t* page = buf_block_get_frame(block); page_zip_des_t* page_zip = buf_block_get_page_zip(block); buf_block_t* temp_block; diff --git a/buf/buf0buf.c b/buf/buf0buf.c index fd7b8959473..a2ff171e0c5 100644 --- a/buf/buf0buf.c +++ b/buf/buf0buf.c @@ -344,7 +344,6 @@ be effective only if PFS_GROUP_BUFFER_SYNC is defined. */ // was allocated for the frames */ // buf_block_t* blocks; /*!< array of buffer control blocks */ //}; -#endif /* !UNIV_HOTBACKUP */ /********************************************************************//** Gets the smallest oldest_modification lsn for any page in the pool. Returns @@ -482,6 +481,7 @@ buf_block_alloc( return(block); } +#endif /* !UNIV_HOTBACKUP */ /********************************************************************//** Calculates a page checksum which is stored to the page when it is written @@ -3907,9 +3907,10 @@ buf_mark_space_corrupt( /********************************************************************//** Completes an asynchronous read or write request of a file page to or from -the buffer pool. */ +the buffer pool. +@return TRUE if successful */ UNIV_INTERN -void +ibool buf_page_io_complete( /*=================*/ buf_page_t* bpage) /*!< in: pointer to the block in question */ @@ -4057,7 +4058,7 @@ corrupt: table as corrupted instead of crashing server */ if (bpage->space > TRX_SYS_SPACE && buf_mark_space_corrupt(bpage)) { - return; + return(FALSE); } else { fputs("InnoDB: Ending processing" " because of" @@ -4176,6 +4177,8 @@ retry_mutex: buf_pool_mutex_exit(buf_pool); mutex_exit(block_mutex); + + return(TRUE); } /********************************************************************//** diff --git a/buf/buf0lru.c b/buf/buf0lru.c index 132b12899b4..08536ea5270 100644 --- a/buf/buf0lru.c +++ b/buf/buf0lru.c @@ -374,7 +374,7 @@ next_page: /******************************************************************//** While flushing (or removing dirty) pages from a tablespace we don't -want to hog the CPU and resources. Release the buffer pool and block +want to hog the CPU and resources. Release the LRU list and block mutex and try to force a context switch. Then reacquire the same mutexes. The current page is "fixed" before the release of the mutexes and then "unfixed" again once we have reacquired the mutexes. */ @@ -387,7 +387,7 @@ buf_flush_yield( { mutex_t* block_mutex; - ut_ad(buf_pool_mutex_own(buf_pool)); + ut_ad(mutex_own(&buf_pool->LRU_list_mutex)); ut_ad(buf_page_in_file(bpage)); block_mutex = buf_page_get_mutex(bpage); @@ -399,13 +399,13 @@ buf_flush_yield( buf_page_set_sticky(bpage); /* Now it is safe to release the buf_pool->mutex. */ - buf_pool_mutex_exit(buf_pool); + mutex_exit(&buf_pool->LRU_list_mutex); mutex_exit(block_mutex); /* Try and force a context switch. */ os_thread_yield(); - buf_pool_mutex_enter(buf_pool); + mutex_enter(&buf_pool->LRU_list_mutex); mutex_enter(block_mutex); /* "Unfix" the block now that we have both the @@ -415,9 +415,9 @@ buf_flush_yield( } /******************************************************************//** -If we have hogged the resources for too long then release the buffer -pool and flush list mutex and do a thread yield. Set the current page -to "sticky" so that it is not relocated during the yield. +If we have hogged the resources for too long then release the LRU list +and flush list mutex and do a thread yield. Set the current page to +"sticky" so that it is not relocated during the yield. @return TRUE if yielded */ static ibool @@ -439,7 +439,7 @@ buf_flush_try_yield( buf_flush_list_mutex_exit(buf_pool); - /* Release the buffer pool and block mutex + /* Release the LRU list and block mutex to give the other threads a go. */ buf_flush_yield(buf_pool, bpage); @@ -472,7 +472,7 @@ buf_flush_or_remove_page( mutex_t* block_mutex; ibool processed = FALSE; - ut_ad(buf_pool_mutex_own(buf_pool)); + ut_ad(mutex_own(&buf_pool->LRU_list_mutex)); ut_ad(buf_flush_list_mutex_own(buf_pool)); block_mutex = buf_page_get_mutex(bpage); @@ -595,11 +595,11 @@ buf_flush_dirty_pages( ibool all_freed; do { - buf_pool_mutex_enter(buf_pool); + mutex_enter(&buf_pool->LRU_list_mutex); all_freed = buf_flush_or_remove_pages(buf_pool, id); - buf_pool_mutex_exit(buf_pool); + mutex_exit(&buf_pool->LRU_list_mutex); ut_ad(buf_flush_validate(buf_pool)); @@ -659,8 +659,16 @@ scan_again: goto next_page; } else { - block_mutex = buf_page_get_mutex(bpage); - mutex_enter(block_mutex); + block_mutex = buf_page_get_mutex_enter(bpage); + + if (!block_mutex) { + /* It may be impossible case... + Something wrong, so will be scan_again */ + + all_freed = FALSE; + goto next_page; + } + if (bpage->buf_fix_count > 0) { @@ -694,7 +702,8 @@ scan_again: ulint page_no; ulint zip_size; - buf_pool_mutex_exit(buf_pool); + mutex_exit(&buf_pool->LRU_list_mutex); + rw_lock_x_unlock(&buf_pool->page_hash_latch); zip_size = buf_page_get_zip_size(bpage); page_no = buf_page_get_page_no(bpage); @@ -2370,9 +2379,23 @@ buf_LRU_free_one_page( be in a state where it can be freed; there may or may not be a hash index to the page */ { +#ifdef UNIV_DEBUG + buf_pool_t* buf_pool = buf_pool_from_bpage(bpage); +#endif + mutex_t* block_mutex = buf_page_get_mutex(bpage); + + ut_ad(buf_pool_mutex_own(buf_pool)); + ut_ad(mutex_own(block_mutex)); + if (buf_LRU_block_remove_hashed_page(bpage, TRUE) != BUF_BLOCK_ZIP_FREE) { buf_LRU_block_free_hashed_page((buf_block_t*) bpage, TRUE); + } else { + /* The block_mutex should have been released by + buf_LRU_block_remove_hashed_page() when it returns + BUF_BLOCK_ZIP_FREE. */ + ut_ad(block_mutex == &buf_pool->zip_mutex); + mutex_enter(block_mutex); } } diff --git a/buf/buf0rea.c b/buf/buf0rea.c index 645d5fdc2f3..4a2c96227ea 100644 --- a/buf/buf0rea.c +++ b/buf/buf0rea.c @@ -50,6 +50,44 @@ read-ahead is not done: this is to prevent flooding the buffer pool with i/o-fixed buffer blocks */ #define BUF_READ_AHEAD_PEND_LIMIT 2 +/********************************************************************//** +Unfixes the pages, unlatches the page, +removes it from page_hash and removes it from LRU. */ +static +void +buf_read_page_handle_error( +/*=======================*/ + buf_page_t* bpage) /*!< in: pointer to the block */ +{ + buf_pool_t* buf_pool = buf_pool_from_bpage(bpage); + const ibool uncompressed = (buf_page_get_state(bpage) + == BUF_BLOCK_FILE_PAGE); + + /* First unfix and release lock on the bpage */ + buf_pool_mutex_enter(buf_pool); + mutex_enter(buf_page_get_mutex(bpage)); + ut_ad(buf_page_get_io_fix(bpage) == BUF_IO_READ); + ut_ad(bpage->buf_fix_count == 0); + + /* Set BUF_IO_NONE before we remove the block from LRU list */ + buf_page_set_io_fix(bpage, BUF_IO_NONE); + + if (uncompressed) { + rw_lock_x_unlock_gen( + &((buf_block_t*) bpage)->lock, + BUF_IO_READ); + } + + /* remove the block from LRU list */ + buf_LRU_free_one_page(bpage); + + ut_ad(buf_pool->n_pend_reads > 0); + buf_pool->n_pend_reads--; + + mutex_exit(buf_page_get_mutex(bpage)); + buf_pool_mutex_exit(buf_pool); +} + /********************************************************************//** Low-level function which reads a page asynchronously from a file to the buffer buf_pool if it is not already there, in which case does nothing. @@ -196,6 +234,11 @@ not_to_recover: } thd_wait_end(NULL); + if (*err == DB_TABLESPACE_DELETED) { + buf_read_page_handle_error(bpage); + return(0); + } + if (srv_pass_corrupt_table) { if (*err != DB_SUCCESS) { bpage->is_corrupt = TRUE; @@ -207,7 +250,9 @@ not_to_recover: if (sync) { /* The i/o is already completed when we arrive from fil_read */ - buf_page_io_complete(bpage); + if (!buf_page_io_complete(bpage)) { + return(0); + } } return(1); diff --git a/dict/dict0dict.c b/dict/dict0dict.c index 4c84a22c4b5..89f13188d95 100644 --- a/dict/dict0dict.c +++ b/dict/dict0dict.c @@ -170,6 +170,7 @@ void dict_field_print_low( /*=================*/ const dict_field_t* field); /*!< in: field */ +#ifndef UNIV_HOTBACKUP /*********************************************************************//** Frees a foreign key struct. */ static @@ -183,7 +184,7 @@ and unique key errors */ UNIV_INTERN FILE* dict_foreign_err_file = NULL; /* mutex protecting the foreign and unique error buffers */ UNIV_INTERN mutex_t dict_foreign_err_mutex; - +#endif /* !UNIV_HOTBACKUP */ /******************************************************************//** Makes all characters in a NUL-terminated UTF-8 string lower case. */ UNIV_INTERN @@ -2315,6 +2316,7 @@ dict_index_build_internal_non_clust( return(new_index); } +#ifndef UNIV_HOTBACKUP /*====================== FOREIGN KEY PROCESSING ========================*/ /*********************************************************************//** @@ -2579,6 +2581,7 @@ dict_foreign_find_equiv_index( FALSE/* allow columns to be NULL */)); } +#endif /* !UNIV_HOTBACKUP */ /**********************************************************************//** Returns an index object by matching on the name and column names and if more than one index matches return the index with the max id @@ -2638,6 +2641,7 @@ dict_table_get_index_by_max_id( return(found); } +#ifndef UNIV_HOTBACKUP /**********************************************************************//** Report an error in a foreign key definition. */ static @@ -2803,6 +2807,7 @@ dict_foreign_add_to_cache( return(DB_SUCCESS); } +#endif /* !UNIV_HOTBACKUP */ /*********************************************************************//** Scans from pointer onwards. Stops if is at the start of a copy of 'string' where characters are compared without case sensitivity, and @@ -3282,6 +3287,7 @@ end_of_string: } } +#ifndef UNIV_HOTBACKUP /*********************************************************************//** Finds the highest [number] for foreign key constraints of the table. Looks only at the >= 4.0.18-format id's, which are of the form @@ -4118,7 +4124,7 @@ syntax_error: } /*==================== END OF FOREIGN KEY PROCESSING ====================*/ - +#endif /* !UNIV_HOTBACKUP */ /**********************************************************************//** Returns an index object if it is found in the dictionary cache. Assumes that dict_sys->mutex is already being held. @@ -4651,12 +4657,6 @@ next_rec: } btr_pcur_close(&pcur); mtr_commit(&mtr); - - if (rests) { - fprintf(stderr, "InnoDB: Warning: failed to store %lu stats entries" - " of %s/%s to SYS_STATS system table.\n", - rests, index->table_name, index->name); - } } /*===========================================*/ @@ -4892,6 +4892,7 @@ next_rec: } } +#ifndef UNIV_HOTBACKUP /**********************************************************************//** Prints info of a foreign key constraint. */ static @@ -4922,6 +4923,7 @@ dict_foreign_print_low( fputs(" )\n", stderr); } +#endif /* !UNIV_HOTBACKUP */ /**********************************************************************//** Prints a table data. */ UNIV_INTERN @@ -5104,6 +5106,7 @@ dict_field_print_low( } } +#ifndef UNIV_HOTBACKUP /**********************************************************************//** Outputs info on a foreign key of a table in a format suitable for CREATE TABLE. */ @@ -5292,6 +5295,7 @@ dict_print_info_on_foreign_keys( mutex_exit(&(dict_sys->mutex)); } +#endif /* !UNIV_HOTBACKUP */ /********************************************************************//** Displays the names of the index and the table. */ UNIV_INTERN @@ -5422,6 +5426,28 @@ dict_table_replace_index_in_foreign_list( foreign->foreign_index = new_index; } } + + + for (foreign = UT_LIST_GET_FIRST(table->referenced_list); + foreign; + foreign = UT_LIST_GET_NEXT(referenced_list, foreign)) { + + dict_index_t* new_index; + + if (foreign->referenced_index == index) { + ut_ad(foreign->referenced_table == index->table); + + new_index = dict_foreign_find_index( + foreign->referenced_table, + foreign->referenced_col_names, + foreign->n_fields, index, + /*check_charsets=*/TRUE, /*check_null=*/FALSE); + ut_ad(new_index || !trx->check_foreigns); + ut_ad(!new_index || new_index->table == index->table); + + foreign->referenced_index = new_index; + } + } } /**********************************************************************//** diff --git a/dict/dict0mem.c b/dict/dict0mem.c index 617c68925cb..6b8c11dfa7a 100644 --- a/dict/dict0mem.c +++ b/dict/dict0mem.c @@ -33,8 +33,8 @@ Created 1/8/1996 Heikki Tuuri #include "data0type.h" #include "mach0data.h" #include "dict0dict.h" -#include "ha_prototypes.h" /* innobase_casedn_str()*/ #ifndef UNIV_HOTBACKUP +# include "ha_prototypes.h" /* innobase_casedn_str()*/ # include "lock0lock.h" #endif /* !UNIV_HOTBACKUP */ #ifdef UNIV_BLOB_DEBUG @@ -274,6 +274,7 @@ dict_mem_index_create( return(index); } +#ifndef UNIV_HOTBACKUP /**********************************************************************//** Creates and initializes a foreign constraint memory object. @return own: foreign constraint struct */ @@ -348,6 +349,7 @@ dict_mem_referenced_table_name_lookup_set( } } +#endif /* !UNIV_HOTBACKUP */ /**********************************************************************//** Adds a field definition to an index. NOTE: does not take a copy of the column name if the field is a column. The memory occupied diff --git a/fil/fil0fil.c b/fil/fil0fil.c index 32e78cf19b4..811b7583d50 100644 --- a/fil/fil0fil.c +++ b/fil/fil0fil.c @@ -867,8 +867,10 @@ fil_node_close_file( ut_a(node->open); ut_a(node->n_pending == 0 || node->space->is_being_deleted); ut_a(node->n_pending_flushes == 0); +#ifndef UNIV_HOTBACKUP ut_a(node->modification_counter == node->flush_counter || srv_fast_shutdown == 2); +#endif /* !UNIV_HOTBACKUP */ ret = os_file_close(node->handle); ut_a(ret); diff --git a/ha/ha0ha.c b/ha/ha0ha.c index 2f5051e541f..b9499607bce 100644 --- a/ha/ha0ha.c +++ b/ha/ha0ha.c @@ -28,6 +28,7 @@ Created 8/22/1994 Heikki Tuuri #include "ha0ha.ic" #endif +#ifndef UNIV_HOTBACKUP #ifdef UNIV_DEBUG # include "buf0buf.h" #endif /* UNIV_DEBUG */ @@ -51,17 +52,13 @@ ha_create_func( hash table: must be a power of 2, or 0 */ { hash_table_t* table; -#ifndef UNIV_HOTBACKUP ulint i; -#endif /* !UNIV_HOTBACKUP */ ut_ad(ut_is_2pow(n_mutexes)); table = hash_create(n); #if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG -# ifndef UNIV_HOTBACKUP table->adaptive = TRUE; -# endif /* !UNIV_HOTBACKUP */ #endif /* UNIV_AHI_DEBUG || UNIV_DEBUG */ /* Creating MEM_HEAP_BTR_SEARCH type heaps can potentially fail, but in practise it never should in this case, hence the asserts. */ @@ -74,7 +71,6 @@ ha_create_func( return(table); } -#ifndef UNIV_HOTBACKUP hash_create_mutexes(table, n_mutexes, mutex_level); table->heaps = mem_alloc(n_mutexes * sizeof(void*)); @@ -83,7 +79,6 @@ ha_create_func( table->heaps[i] = mem_heap_create_in_btr_search(4096); ut_a(table->heaps[i]); } -#endif /* !UNIV_HOTBACKUP */ return(table); } @@ -134,7 +129,6 @@ ha_insert_for_fold_func( while (prev_node != NULL) { if (prev_node->fold == fold) { #if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG -# ifndef UNIV_HOTBACKUP if (table->adaptive) { buf_block_t* prev_block = prev_node->block; ut_a(prev_block->frame @@ -143,7 +137,6 @@ ha_insert_for_fold_func( prev_block->n_pointers--; block->n_pointers++; } -# endif /* !UNIV_HOTBACKUP */ prev_node->block = block; #endif /* UNIV_AHI_DEBUG || UNIV_DEBUG */ @@ -171,11 +164,9 @@ ha_insert_for_fold_func( ha_node_set_data(node, block, data); #if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG -# ifndef UNIV_HOTBACKUP if (table->adaptive) { block->n_pointers++; } -# endif /* !UNIV_HOTBACKUP */ #endif /* UNIV_AHI_DEBUG || UNIV_DEBUG */ node->fold = fold; @@ -217,13 +208,11 @@ ha_delete_hash_node( #endif /* UNIV_SYNC_DEBUG */ ut_ad(btr_search_enabled); #if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG -# ifndef UNIV_HOTBACKUP if (table->adaptive) { ut_a(del_node->block->frame = page_align(del_node->data)); ut_a(del_node->block->n_pointers > 0); del_node->block->n_pointers--; } -# endif /* !UNIV_HOTBACKUP */ #endif /* UNIV_AHI_DEBUG || UNIV_DEBUG */ HASH_DELETE_AND_COMPACT(ha_node_t, next, table, del_node); @@ -264,13 +253,11 @@ ha_search_and_update_if_found_func( if (node) { #if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG -# ifndef UNIV_HOTBACKUP if (table->adaptive) { ut_a(node->block->n_pointers > 0); node->block->n_pointers--; new_block->n_pointers++; } -# endif /* !UNIV_HOTBACKUP */ node->block = new_block; #endif /* UNIV_AHI_DEBUG || UNIV_DEBUG */ @@ -278,7 +265,6 @@ ha_search_and_update_if_found_func( } } -#ifndef UNIV_HOTBACKUP /*****************************************************************//** Removes from the chain determined by fold all nodes whose data pointer points to the page given. */ diff --git a/handler/ha_innodb.cc b/handler/ha_innodb.cc index a1a60aa2276..f5eea6d086b 100644 --- a/handler/ha_innodb.cc +++ b/handler/ha_innodb.cc @@ -49,6 +49,7 @@ this program; if not, write to the Free Software Foundation, Inc., #include // PROCESS_ACL #include +#include // DEBUG_SYNC #include #include #include @@ -500,6 +501,9 @@ static MYSQL_THDVAR_BOOL(fake_changes, PLUGIN_VAR_OPCMDARG, "This is to cause replication prefetch IO. ATTENTION: the transaction started after enabled is affected.", NULL, NULL, FALSE); +static MYSQL_THDVAR_ULONG(merge_sort_block_size, PLUGIN_VAR_RQCMDARG, + "The block size used doing external merge-sort for secondary index creation.", + NULL, NULL, 1UL << 20, 1UL << 20, 1UL << 30, 0); static handler *innobase_create_handler(handlerton *hton, TABLE_SHARE *table, @@ -1018,6 +1022,20 @@ thd_expand_fast_index_creation( return((ibool) (((THD*) thd)->variables.expand_fast_index_creation)); } +/******************************************************************//** +Returns the merge-sort block size used for the secondary index creation +for the current connection. +@return the merge-sort block size, in bytes */ +extern "C" UNIV_INTERN +ulong +thd_merge_sort_block_size( +/*================================*/ + void* thd) /*!< in: thread handle (THD*), or NULL to query ++ the global merge_sort_block_size */ +{ + return(THDVAR((THD*) thd, merge_sort_block_size)); +} + /********************************************************************//** Obtain the InnoDB transaction of a MySQL thread. @return reference to transaction pointer */ @@ -2900,6 +2918,7 @@ innobase_change_buffering_inited_ok: srv_read_ahead &= 3; srv_adaptive_flushing_method %= 3; + srv_flush_neighbor_pages %= 3; srv_force_recovery = (ulint) innobase_force_recovery; @@ -6573,6 +6592,7 @@ ha_innobase::index_read( ulint ret; DBUG_ENTER("index_read"); + DEBUG_SYNC_C("ha_innobase_index_read_begin"); ut_a(prebuilt->trx == thd_to_trx(user_thd)); ut_ad(key_len != 0 || find_flag != HA_READ_KEY_EXACT); @@ -8458,6 +8478,8 @@ ha_innobase::rename_table( error = innobase_rename_table(trx, from, to, TRUE); + DEBUG_SYNC(thd, "after_innobase_rename_table"); + /* Tell the InnoDB server that there might be work for utility threads: */ @@ -8784,10 +8806,15 @@ innobase_get_mysql_key_number_for_index( } } - /* Print an error message if we cannot find the index - ** in the "index translation table". */ - sql_print_error("Cannot find index %s in InnoDB index " - "translation table.", index->name); + /* If index_count in translation table is set to 0, it + is possible we are in the process of rebuilding table, + do not spit error in this case */ + if (share->idx_trans_tbl.index_count) { + /* Print an error message if we cannot find the index + ** in the "index translation table". */ + sql_print_error("Cannot find index %s in InnoDB index " + "translation table.", index->name); + } } /* If we do not have an "index translation table", or not able @@ -12251,7 +12278,7 @@ static MYSQL_SYSVAR_BOOL(doublewrite, innobase_use_doublewrite, static MYSQL_SYSVAR_ULONG(io_capacity, srv_io_capacity, PLUGIN_VAR_RQCMDARG, "Number of IOPs the server can do. Tunes the background IO rate", - NULL, NULL, 200, 100, ~0L, 0); + NULL, NULL, 200, 100, ~0UL, 0); static MYSQL_SYSVAR_ULONG(purge_batch_size, srv_purge_batch_size, PLUGIN_VAR_OPCMDARG, @@ -12384,7 +12411,7 @@ static MYSQL_SYSVAR_BOOL(adaptive_flushing, srv_adaptive_flushing, static MYSQL_SYSVAR_ULONG(max_purge_lag, srv_max_purge_lag, PLUGIN_VAR_RQCMDARG, "Desired maximum length of the purge queue (0 = no limit)", - NULL, NULL, 0, 0, ~0L, 0); + NULL, NULL, 0, 0, ~0UL, 0); static MYSQL_SYSVAR_BOOL(rollback_on_timeout, innobase_rollback_on_timeout, PLUGIN_VAR_OPCMDARG | PLUGIN_VAR_READONLY, @@ -12488,7 +12515,7 @@ static MYSQL_SYSVAR_ULONG(commit_concurrency, innobase_commit_concurrency, static MYSQL_SYSVAR_ULONG(concurrency_tickets, srv_n_free_tickets_to_enter, PLUGIN_VAR_RQCMDARG, "Number of times a thread is allowed to enter InnoDB within the same SQL query after it has once got the ticket", - NULL, NULL, 500L, 1L, ~0L, 0); + NULL, NULL, 500L, 1L, ~0UL, 0); static MYSQL_SYSVAR_LONG(kill_idle_transaction, srv_kill_idle_transaction, PLUGIN_VAR_RQCMDARG, @@ -12559,12 +12586,12 @@ static MYSQL_SYSVAR_LONG(open_files, innobase_open_files, static MYSQL_SYSVAR_ULONG(sync_spin_loops, srv_n_spin_wait_rounds, PLUGIN_VAR_RQCMDARG, "Count of spin-loop rounds in InnoDB mutexes (30 by default)", - NULL, NULL, 30L, 0L, ~0L, 0); + NULL, NULL, 30L, 0L, ~0UL, 0); static MYSQL_SYSVAR_ULONG(spin_wait_delay, srv_spin_wait_delay, PLUGIN_VAR_OPCMDARG, "Maximum delay between polling for a spin lock (6 by default)", - NULL, NULL, 6L, 0L, ~0L, 0); + NULL, NULL, 6L, 0L, ~0UL, 0); static MYSQL_SYSVAR_BOOL(thread_concurrency_timer_based, innobase_thread_concurrency_timer_based, @@ -12580,7 +12607,7 @@ static MYSQL_SYSVAR_ULONG(thread_concurrency, srv_thread_concurrency, static MYSQL_SYSVAR_ULONG(thread_sleep_delay, srv_thread_sleep_delay, PLUGIN_VAR_RQCMDARG, "Time of innodb thread sleeping before joining InnoDB queue (usec). Value 0 disable a sleep", - NULL, NULL, 10000L, 0L, ~0L, 0); + NULL, NULL, 10000L, 0L, ~0UL, 0); static MYSQL_SYSVAR_STR(data_file_path, innobase_data_file_path, PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY, @@ -12755,7 +12782,7 @@ innodb_adaptive_flushing_method_update( void* var_ptr, const void* save) { - *(long *)var_ptr= (*(long *)save) % 4; + *(long *)var_ptr= (*(long *)save) % 3; } const char *adaptive_flushing_method_names[]= { @@ -12933,6 +12960,7 @@ static struct st_mysql_sys_var* innobase_system_variables[]= { MYSQL_SYSVAR(corrupt_table_action), MYSQL_SYSVAR(lazy_drop_table), MYSQL_SYSVAR(fake_changes), + MYSQL_SYSVAR(merge_sort_block_size), NULL }; @@ -12953,6 +12981,7 @@ mysql_declare_plugin(innobase) 0, /* flags */ }, i_s_innodb_rseg, +i_s_innodb_undo_logs, i_s_innodb_trx, i_s_innodb_locks, i_s_innodb_lock_waits, diff --git a/handler/handler0alter.cc b/handler/handler0alter.cc index 398e8bee425..46ffc28180d 100644 --- a/handler/handler0alter.cc +++ b/handler/handler0alter.cc @@ -712,6 +712,10 @@ ha_innobase::add_index( ut_a(indexed_table == prebuilt->table); + if (indexed_table->tablespace_discarded) { + DBUG_RETURN(-1); + } + /* Check that index keys are sensible */ error = innobase_check_index_keys(key_info, num_of_keys, prebuilt->table); @@ -780,7 +784,7 @@ ha_innobase::add_index( row_mysql_lock_data_dictionary(trx); dict_locked = TRUE; - ut_d(dict_table_check_for_dup_indexes(prebuilt->table, FALSE)); + ut_d(dict_table_check_for_dup_indexes(prebuilt->table, TRUE)); /* If a new primary key is defined for the table we need to drop the original table and rebuild all indexes. */ @@ -816,7 +820,7 @@ ha_innobase::add_index( } ut_d(dict_table_check_for_dup_indexes(prebuilt->table, - FALSE)); + TRUE)); mem_heap_free(heap); trx_general_rollback_for_mysql(trx, NULL); row_mysql_unlock_data_dictionary(trx); @@ -1070,7 +1074,7 @@ ha_innobase::final_add_index( trx_commit_for_mysql(prebuilt->trx); } - ut_d(dict_table_check_for_dup_indexes(prebuilt->table, FALSE)); + ut_d(dict_table_check_for_dup_indexes(prebuilt->table, TRUE)); row_mysql_unlock_data_dictionary(trx); trx_free_for_mysql(trx); @@ -1117,7 +1121,7 @@ ha_innobase::prepare_drop_index( /* Test and mark all the indexes to be dropped */ row_mysql_lock_data_dictionary(trx); - ut_d(dict_table_check_for_dup_indexes(prebuilt->table, FALSE)); + ut_d(dict_table_check_for_dup_indexes(prebuilt->table, TRUE)); /* Check that none of the indexes have previously been flagged for deletion. */ @@ -1288,7 +1292,7 @@ func_exit: } while (index); } - ut_d(dict_table_check_for_dup_indexes(prebuilt->table, FALSE)); + ut_d(dict_table_check_for_dup_indexes(prebuilt->table, TRUE)); row_mysql_unlock_data_dictionary(trx); DBUG_RETURN(err); @@ -1341,7 +1345,7 @@ ha_innobase::final_drop_index( prebuilt->table->flags, user_thd); row_mysql_lock_data_dictionary(trx); - ut_d(dict_table_check_for_dup_indexes(prebuilt->table, FALSE)); + ut_d(dict_table_check_for_dup_indexes(prebuilt->table, TRUE)); if (UNIV_UNLIKELY(err)) { @@ -1385,7 +1389,7 @@ ha_innobase::final_drop_index( share->idx_trans_tbl.index_count = 0; func_exit: - ut_d(dict_table_check_for_dup_indexes(prebuilt->table, FALSE)); + ut_d(dict_table_check_for_dup_indexes(prebuilt->table, TRUE)); trx_commit_for_mysql(trx); trx_commit_for_mysql(prebuilt->trx); row_mysql_unlock_data_dictionary(trx); diff --git a/handler/i_s.cc b/handler/i_s.cc index a7b453846f7..c03ecb15e1c 100644 --- a/handler/i_s.cc +++ b/handler/i_s.cc @@ -48,6 +48,7 @@ extern "C" { #include "trx0i_s.h" #include "trx0trx.h" /* for TRX_QUE_STATE_STR_MAX_LEN */ #include "trx0rseg.h" /* for trx_rseg_struct */ +#include "trx0undo.h" /* for trx_undo_struct */ #include "trx0sys.h" /* for trx_sys */ #include "dict0dict.h" /* for dict_sys */ #include "buf0lru.h" /* for XTRA_LRU_[DUMP/RESTORE] */ @@ -5144,3 +5145,247 @@ UNIV_INTERN struct st_mysql_plugin i_s_innodb_buffer_pool_pages_blob = STRUCT_FLD(flags, 0UL) }; + +static ST_FIELD_INFO i_s_innodb_undo_logs_fields_info[] = +{ +#define IDX_USEG_TRX_ID 0 + {STRUCT_FLD(field_name, "trx_id"), + STRUCT_FLD(field_length, TRX_ID_MAX_LEN + 1), + STRUCT_FLD(field_type, MYSQL_TYPE_STRING), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, 0), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_USEG_RSEG_ID 1 + {STRUCT_FLD(field_name, "rseg_id"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_USEG_USEG_ID 2 + {STRUCT_FLD(field_name, "useg_id"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_USEG_TYPE 3 +#define USEG_TYPE_MAX_LEN 256 + {STRUCT_FLD(field_name, "type"), + STRUCT_FLD(field_length, USEG_TYPE_MAX_LEN), + STRUCT_FLD(field_type, MYSQL_TYPE_STRING), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, 0), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + + #define IDX_USEG_STATE 4 + #define USEG_STATE_MAX_LEN 256 + {STRUCT_FLD(field_name, "state"), + STRUCT_FLD(field_length, USEG_STATE_MAX_LEN), + STRUCT_FLD(field_type, MYSQL_TYPE_STRING), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, 0), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + +#define IDX_USEG_SIZE 5 + {STRUCT_FLD(field_name, "size"), + STRUCT_FLD(field_length, MY_INT64_NUM_DECIMAL_DIGITS), + STRUCT_FLD(field_type, MYSQL_TYPE_LONGLONG), + STRUCT_FLD(value, 0), + STRUCT_FLD(field_flags, MY_I_S_UNSIGNED), + STRUCT_FLD(old_name, ""), + STRUCT_FLD(open_method, SKIP_OPEN_TABLE)}, + + END_OF_ST_FIELD_INFO +}; +static +int +i_s_innodb_undo_logs_fill_store( +/*=================*/ + THD* thd, /* in: thread */ + TABLE* table, /* in/out: table to fill */ + trx_undo_t* useg) /* in: useg to fill from */ +{ + char trx_id[TRX_ID_MAX_LEN + 1]; + + DBUG_ENTER("i_s_innodb_undo_logs_fill_store"); + + switch (useg->type) { + case TRX_UNDO_INSERT: + OK(field_store_string(table->field[IDX_USEG_TYPE], "INSERT")); + break; + case TRX_UNDO_UPDATE: + OK(field_store_string(table->field[IDX_USEG_TYPE], "UPDATE")); + break; + default: + OK(field_store_string(table->field[IDX_USEG_TYPE], "UNKNOWN")); + break; + } + + ut_snprintf(trx_id, sizeof(trx_id), TRX_ID_FMT, useg->trx_id); + + switch (useg->state) { + case TRX_UNDO_ACTIVE: + OK(field_store_string(table->field[IDX_USEG_TRX_ID], trx_id)); + OK(field_store_string(table->field[IDX_USEG_STATE], "ACTIVE")); + break; + case TRX_UNDO_CACHED: + OK(field_store_string(table->field[IDX_USEG_TRX_ID], NULL)); + OK(field_store_string(table->field[IDX_USEG_STATE], "CACHED")); + break; + case TRX_UNDO_TO_FREE: + OK(field_store_string(table->field[IDX_USEG_TRX_ID], NULL)); + OK(field_store_string(table->field[IDX_USEG_STATE], "TO_FREE")); + break; + case TRX_UNDO_TO_PURGE: + OK(field_store_string(table->field[IDX_USEG_TRX_ID], NULL)); + OK(field_store_string(table->field[IDX_USEG_STATE], "TO_PURGE")); + break; + case TRX_UNDO_PREPARED: + OK(field_store_string(table->field[IDX_USEG_TRX_ID], trx_id)); + OK(field_store_string(table->field[IDX_USEG_STATE], "PREPARED")); + break; + default: + OK(field_store_string(table->field[IDX_USEG_TRX_ID], trx_id)); + OK(field_store_string(table->field[IDX_USEG_STATE], "UNKNOWN")); + break; + } + + table->field[IDX_USEG_RSEG_ID]->store(useg->rseg->id); + table->field[IDX_USEG_USEG_ID]->store(useg->id); + table->field[IDX_USEG_SIZE]->store(useg->size); + if (schema_table_store_record(thd, table)) { + DBUG_RETURN(1); + } + DBUG_RETURN(0); +} +static +int +i_s_innodb_undo_logs_fill( +/*=================*/ + THD* thd, /* in: thread */ + TABLE_LIST* tables, /* in/out: tables to fill */ + COND* cond) /* in: condition (ignored) */ +{ + TABLE* table = (TABLE *) tables->table; + int status = 0; + trx_rseg_t* rseg; + trx_undo_t* useg; + + DBUG_ENTER("i_s_innodb_undo_logs_fill"); + + /* deny access to non-superusers */ + if (check_global_access(thd, PROCESS_ACL)) { + DBUG_RETURN(0); + } + + RETURN_IF_INNODB_NOT_STARTED(tables->schema_table_name); + + rseg = UT_LIST_GET_FIRST(trx_sys->rseg_list); + while (rseg && status == 0) { + mutex_enter(&(rseg->mutex)); + useg = UT_LIST_GET_FIRST(rseg->update_undo_list); + while (useg && status == 0) { + status = i_s_innodb_undo_logs_fill_store(thd, table, useg); + useg = UT_LIST_GET_NEXT(undo_list, useg); + } + + useg = UT_LIST_GET_FIRST(rseg->update_undo_cached); + while (useg && status == 0) { + status = i_s_innodb_undo_logs_fill_store(thd, table, useg); + useg = UT_LIST_GET_NEXT(undo_list, useg); + } + + useg = UT_LIST_GET_FIRST(rseg->insert_undo_list); + while (useg && status == 0) { + status = i_s_innodb_undo_logs_fill_store(thd, table, useg); + useg = UT_LIST_GET_NEXT(undo_list, useg); + } + + useg = UT_LIST_GET_FIRST(rseg->insert_undo_cached); + while (useg && status == 0) { + status = i_s_innodb_undo_logs_fill_store(thd, table, useg); + useg = UT_LIST_GET_NEXT(undo_list, useg); + } + mutex_exit(&(rseg->mutex)); + rseg = UT_LIST_GET_NEXT(rseg_list, rseg); + } + + DBUG_RETURN(status); +} + +static +int +i_s_innodb_undo_logs_init( +/*=================*/ + /* out: 0 on success */ + void* p) /* in/out: table schema object */ +{ + DBUG_ENTER("i_s_innodb_undo_logs_init"); + ST_SCHEMA_TABLE* schema = (ST_SCHEMA_TABLE*) p; + + schema->fields_info = i_s_innodb_undo_logs_fields_info; + schema->fill_table = i_s_innodb_undo_logs_fill; + + DBUG_RETURN(0); +} + +UNIV_INTERN struct st_mysql_plugin i_s_innodb_undo_logs = +{ + /* the plugin type (a MYSQL_XXX_PLUGIN value) */ + /* int */ + STRUCT_FLD(type, MYSQL_INFORMATION_SCHEMA_PLUGIN), + + /* pointer to type-specific plugin descriptor */ + /* void* */ + STRUCT_FLD(info, &i_s_info), + + /* plugin name */ + /* const char* */ + STRUCT_FLD(name, "INNODB_UNDO_LOGS"), + + /* plugin author (for SHOW PLUGINS) */ + /* const char* */ + STRUCT_FLD(author, "Percona"), + + /* general descriptive text (for SHOW PLUGINS) */ + /* const char* */ + STRUCT_FLD(descr, "InnoDB rollback undo segment information"), + + /* the plugin license (PLUGIN_LICENSE_XXX) */ + /* int */ + STRUCT_FLD(license, PLUGIN_LICENSE_GPL), + + /* the function to invoke when plugin is loaded */ + /* int (*)(void*); */ + STRUCT_FLD(init, i_s_innodb_undo_logs_init), + + /* the function to invoke when plugin is unloaded */ + /* int (*)(void*); */ STRUCT_FLD(deinit, i_s_common_deinit), + + /* plugin version (for SHOW PLUGINS) */ + STRUCT_FLD(version, 0x0100 /* 1.0 */), + + /* struct st_mysql_show_var* */ + STRUCT_FLD(status_vars, NULL), + + /* struct st_mysql_sys_var** */ + STRUCT_FLD(system_vars, NULL), + + /* reserved for dependency checking */ + /* void* */ + STRUCT_FLD(__reserved1, NULL), + + /* Plugin flags */ + /* unsigned long */ + STRUCT_FLD(flags, 0UL), +}; + diff --git a/handler/i_s.h b/handler/i_s.h index fe4f2ba6dcf..723efd6a693 100644 --- a/handler/i_s.h +++ b/handler/i_s.h @@ -43,6 +43,7 @@ extern struct st_mysql_plugin i_s_innodb_sys_fields; extern struct st_mysql_plugin i_s_innodb_sys_foreign; extern struct st_mysql_plugin i_s_innodb_sys_foreign_cols; extern struct st_mysql_plugin i_s_innodb_rseg; +extern struct st_mysql_plugin i_s_innodb_undo_logs; extern struct st_mysql_plugin i_s_innodb_sys_stats; extern struct st_mysql_plugin i_s_innodb_table_stats; extern struct st_mysql_plugin i_s_innodb_index_stats; diff --git a/include/btr0btr.h b/include/btr0btr.h index 520527d0375..03e89ae3f7d 100644 --- a/include/btr0btr.h +++ b/include/btr0btr.h @@ -92,6 +92,8 @@ insert/delete buffer when the record is not in the buffer pool. */ buffer when the record is not in the buffer pool. */ #define BTR_DELETE 8192 +#endif /* UNIV_HOTBACKUP */ + /**************************************************************//** Report that an index page is corrupted. */ UNIV_INTERN @@ -112,6 +114,7 @@ btr_corruption_report( ut_error; \ } +#ifndef UNIV_HOTBACKUP #ifdef UNIV_BLOB_DEBUG # include "ut0rbt.h" /** An index->blobs entry for keeping track of off-page column references */ diff --git a/include/btr0types.h b/include/btr0types.h index 6f515c3f58c..43c6b425688 100644 --- a/include/btr0types.h +++ b/include/btr0types.h @@ -39,6 +39,8 @@ typedef struct btr_cur_struct btr_cur_t; /** B-tree search information for the adaptive hash index */ typedef struct btr_search_struct btr_search_t; +#ifndef UNIV_HOTBACKUP + /** @brief The latch protecting the adaptive search system This latch protects the @@ -56,6 +58,8 @@ Bear in mind (3) and (4) when using the hash index. extern rw_lock_t** btr_search_latch_part; +#endif /* UNIV_HOTBACKUP */ + /** The latch protecting the adaptive search system */ //#define btr_search_latch (*btr_search_latch_temp) diff --git a/include/buf0buf.h b/include/buf0buf.h index 7502942d681..44130aa8b99 100644 --- a/include/buf0buf.h +++ b/include/buf0buf.h @@ -608,34 +608,34 @@ ib_uint64_t buf_block_get_modify_clock( /*=======================*/ buf_block_t* block); /*!< in: block */ -#else /* !UNIV_HOTBACKUP */ -# define buf_block_modify_clock_inc(block) ((void) 0) -#endif /* !UNIV_HOTBACKUP */ /*******************************************************************//** Increments the bufferfix count. */ UNIV_INLINE void buf_block_buf_fix_inc_func( /*=======================*/ -#ifdef UNIV_SYNC_DEBUG +# ifdef UNIV_SYNC_DEBUG const char* file, /*!< in: file name */ ulint line, /*!< in: line */ -#endif /* UNIV_SYNC_DEBUG */ +# endif /* UNIV_SYNC_DEBUG */ buf_block_t* block) /*!< in/out: block to bufferfix */ __attribute__((nonnull)); -#ifdef UNIV_SYNC_DEBUG +# ifdef UNIV_SYNC_DEBUG /** Increments the bufferfix count. @param b in/out: block to bufferfix @param f in: file name where requested @param l in: line number where requested */ # define buf_block_buf_fix_inc(b,f,l) buf_block_buf_fix_inc_func(f,l,b) -#else /* UNIV_SYNC_DEBUG */ +# else /* UNIV_SYNC_DEBUG */ /** Increments the bufferfix count. @param b in/out: block to bufferfix @param f in: file name where requested @param l in: line number where requested */ # define buf_block_buf_fix_inc(b,f,l) buf_block_buf_fix_inc_func(b) -#endif /* UNIV_SYNC_DEBUG */ +# endif /* UNIV_SYNC_DEBUG */ +#else /* !UNIV_HOTBACKUP */ +# define buf_block_modify_clock_inc(block) ((void) 0) +#endif /* !UNIV_HOTBACKUP */ /********************************************************************//** Calculates a page checksum which is stored to the page when it is written to a file. Note that we must be careful to calculate the same value @@ -1191,9 +1191,10 @@ buf_page_init_for_read( ulint offset);/*!< in: page number */ /********************************************************************//** Completes an asynchronous read or write request of a file page to or from -the buffer pool. */ +the buffer pool. +@return TRUE if successful */ UNIV_INTERN -void +ibool buf_page_io_complete( /*=================*/ buf_page_t* bpage); /*!< in: pointer to the block in question */ diff --git a/include/buf0buf.ic b/include/buf0buf.ic index 66006d366c6..6595e86a8fe 100644 --- a/include/buf0buf.ic +++ b/include/buf0buf.ic @@ -31,6 +31,7 @@ Created 11/5/1995 Heikki Tuuri *******************************************************/ #include "mtr0mtr.h" +#ifndef UNIV_HOTBACKUP #include "buf0flu.h" #include "buf0lru.h" #include "buf0rea.h" @@ -180,6 +181,7 @@ buf_page_peek_if_too_old( return(!buf_page_peek_if_young(bpage)); } } +#endif /* !UNIV_HOTBACKUP */ /*********************************************************************//** Gets the state of a block. diff --git a/include/dict0dict.h b/include/dict0dict.h index 6ce1aed17b7..6c1c4117c05 100644 --- a/include/dict0dict.h +++ b/include/dict0dict.h @@ -750,6 +750,7 @@ ulint dict_table_zip_size( /*================*/ const dict_table_t* table); /*!< in: table */ +#ifndef UNIV_HOTBACKUP /*********************************************************************//** Obtain exclusive locks on all index trees of the table. This is to prevent accessing index trees while InnoDB is updating internal metadata for @@ -766,6 +767,7 @@ void dict_table_x_unlock_indexes( /*========================*/ dict_table_t* table); /*!< in: table */ +#endif /* !UNIV_HOTBACKUP */ /********************************************************************//** Checks if a column is in the ordering columns of the clustered index of a table. Column prefixes are treated like whole columns. @@ -1266,7 +1268,7 @@ UNIV_INTERN void dict_close(void); /*============*/ - +#ifndef UNIV_HOTBACKUP /**********************************************************************//** Check whether the table is corrupted. @return nonzero for corrupted table, zero for valid tables */ @@ -1287,6 +1289,7 @@ dict_index_is_corrupted( const dict_index_t* index) /*!< in: index */ __attribute__((nonnull, pure, warn_unused_result)); +#endif /* !UNIV_HOTBACKUP */ /**********************************************************************//** Flags an index and table corrupted both in the data dictionary cache and in the system table SYS_INDEXES. */ diff --git a/include/dict0dict.ic b/include/dict0dict.ic index 1c09722e8d7..eeb916fe181 100644 --- a/include/dict0dict.ic +++ b/include/dict0dict.ic @@ -491,6 +491,7 @@ dict_table_zip_size( return(dict_table_flags_to_zip_size(table->flags)); } +#ifndef UNIV_HOTBACKUP /*********************************************************************//** Obtain exclusive locks on all index trees of the table. This is to prevent accessing index trees while InnoDB is updating internal metadata for @@ -533,6 +534,7 @@ dict_table_x_unlock_indexes( rw_lock_x_unlock(dict_index_get_lock(index)); } } +#endif /* !UNIV_HOTBACKUP */ /********************************************************************//** Gets the number of fields in the internal representation of an index, including fields added by the dictionary system. diff --git a/include/ha_prototypes.h b/include/ha_prototypes.h index 8dc968baebe..64e7003ea0a 100644 --- a/include/ha_prototypes.h +++ b/include/ha_prototypes.h @@ -314,4 +314,15 @@ thd_expand_fast_index_creation( void* thd); /*!< in: thread handle (THD*) */ +/********************************************************************//** +Returns the merge-sort block size used for the secondary index creation +for the current connection. +@return the merge-sort block size, in bytes */ + +ulong +thd_merge_sort_block_size( +/*======================*/ + void* thd); /*!< in: thread handle (THD*), or NULL to query + the global merge_sort_block_size */ + #endif diff --git a/include/log0log.h b/include/log0log.h index c39c7b0c126..31cbfe1a974 100644 --- a/include/log0log.h +++ b/include/log0log.h @@ -765,7 +765,6 @@ struct log_struct{ buffer */ #ifndef UNIV_HOTBACKUP mutex_t mutex; /*!< mutex protecting the log */ -#endif /* !UNIV_HOTBACKUP */ mutex_t log_flush_order_mutex;/*!< mutex to serialize access to the flush list when we are putting @@ -775,6 +774,7 @@ struct log_struct{ mtr_commit and still ensure that insertions in the flush_list happen in the LSN order. */ +#endif /* !UNIV_HOTBACKUP */ byte* buf_ptr; /* unaligned log buffer */ byte* buf; /*!< log buffer */ ulint buf_size; /*!< log buffer size in bytes */ diff --git a/include/os0file.h b/include/os0file.h index 366a2862e99..bbb3acca6c7 100644 --- a/include/os0file.h +++ b/include/os0file.h @@ -316,7 +316,7 @@ to original un-instrumented file I/O APIs */ os_file_create_func(name, create, purpose, type, success) # define os_file_create_simple(key, name, create, access, success) \ - os_file_create_simple_func(name, create_mode, access, success) + os_file_create_simple_func(name, create, access, success) # define os_file_create_simple_no_error_handling( \ key, name, create_mode, access, success) \ diff --git a/include/srv0srv.h b/include/srv0srv.h index 2a960089bc2..d81aa1c36df 100644 --- a/include/srv0srv.h +++ b/include/srv0srv.h @@ -114,13 +114,13 @@ extern ulint srv_max_file_format_at_startup; /** Place locks to records only i.e. do not use next-key locking except on duplicate key checking and foreign key checking */ extern ibool srv_locks_unsafe_for_binlog; -#endif /* !UNIV_HOTBACKUP */ /* If this flag is TRUE, then we will use the native aio of the OS (provided we compiled Innobase with it in), otherwise we will use simulated aio we build below with threads. Currently we support native aio on windows and linux */ extern my_bool srv_use_native_aio; +#endif /* !UNIV_HOTBACKUP */ #ifdef __WIN__ extern ibool srv_use_native_conditions; #endif diff --git a/include/trx0sys.h b/include/trx0sys.h index 976cb31563f..c933fb405e1 100644 --- a/include/trx0sys.h +++ b/include/trx0sys.h @@ -248,7 +248,6 @@ UNIV_INLINE trx_id_t trx_sys_get_new_trx_id(void); /*========================*/ -#endif /* !UNIV_HOTBACKUP */ #ifdef UNIV_DEBUG /* Flag to control TRX_RSEG_N_SLOTS behavior debugging. */ @@ -265,7 +264,6 @@ trx_write_trx_id( /*=============*/ byte* ptr, /*!< in: pointer to memory where written */ trx_id_t id); /*!< in: id */ -#ifndef UNIV_HOTBACKUP /*****************************************************************//** Reads a trx id from an index page. In case that the id size changes in some future version, this function should be used instead of @@ -603,7 +601,6 @@ FIL_PAGE_ARCH_LOG_NO_OR_SPACE_NO. */ #define TRX_SYS_DOUBLEWRITE_BLOCK_SIZE FSP_EXTENT_SIZE /* @} */ -#ifndef UNIV_HOTBACKUP /** File format tag */ /* @{ */ /** The offset of the file format tag on the trx system header page @@ -622,6 +619,7 @@ identifier is added to this 64-bit constant. */ | TRX_SYS_FILE_FORMAT_TAG_MAGIC_N_LOW) /* @} */ +#ifndef UNIV_HOTBACKUP /** Doublewrite control struct */ struct trx_doublewrite_struct{ mutex_t mutex; /*!< mutex protecting the first_free field and diff --git a/mem/mem0dbg.c b/mem/mem0dbg.c index ae43d6097a6..0909b7c9a64 100644 --- a/mem/mem0dbg.c +++ b/mem/mem0dbg.c @@ -24,7 +24,9 @@ but is included in mem0mem.* ! Created 6/9/1994 Heikki Tuuri *************************************************************************/ -#include "ha_prototypes.h" +#ifndef UNIV_HOTBACKUP +# include "ha_prototypes.h" +#endif /* !UNIV_HOTBACKUP */ #ifdef UNIV_MEM_DEBUG # ifndef UNIV_HOTBACKUP diff --git a/os/os0file.c b/os/os0file.c index 26636c8a6cb..2f2e554d97c 100644 --- a/os/os0file.c +++ b/os/os0file.c @@ -307,6 +307,7 @@ UNIV_INTERN ulint os_n_pending_writes = 0; UNIV_INTERN ulint os_n_pending_reads = 0; #ifdef UNIV_DEBUG +# ifndef UNIV_HOTBACKUP /**********************************************************************//** Validates the consistency the aio system some of the time. @return TRUE if ok or the check was skipped */ @@ -333,6 +334,7 @@ os_aio_validate_skip(void) os_aio_validate_count = OS_AIO_VALIDATE_SKIP; return(os_aio_validate()); } +# endif /* !UNIV_HOTBACKUP */ #endif /* UNIV_DEBUG */ #ifdef __WIN__ diff --git a/page/page0zip.c b/page/page0zip.c index d4b0dd8339d..4751f4816a9 100644 --- a/page/page0zip.c +++ b/page/page0zip.c @@ -4437,7 +4437,9 @@ page_zip_reorganize( dict_index_t* index, /*!< in: index of the B-tree node */ mtr_t* mtr) /*!< in: mini-transaction */ { +#ifndef UNIV_HOTBACKUP buf_pool_t* buf_pool = buf_pool_from_block(block); +#endif /* !UNIV_HOTBACKUP */ page_zip_des_t* page_zip = buf_block_get_page_zip(block); page_t* page = buf_block_get_frame(block); buf_block_t* temp_block; diff --git a/row/row0ins.c b/row/row0ins.c index a629a4fb195..b21d48c7552 100644 --- a/row/row0ins.c +++ b/row/row0ins.c @@ -1281,7 +1281,8 @@ run_again: check_index = foreign->foreign_index; } - if (check_table == NULL || check_table->ibd_file_missing) { + if (check_table == NULL || check_table->ibd_file_missing + || check_index == NULL) { if (check_ref) { FILE* ef = dict_foreign_err_file; @@ -1316,9 +1317,6 @@ run_again: goto exit_func; } - ut_a(check_table); - ut_a(check_index); - if (check_table != table) { /* We already have a LOCK_IX on table, but not necessarily on check_table */ diff --git a/row/row0merge.c b/row/row0merge.c index c303a372ed0..ac11379ab58 100644 --- a/row/row0merge.c +++ b/row/row0merge.c @@ -89,8 +89,9 @@ rounded to a power of 2. When not creating a PRIMARY KEY that contains column prefixes, this can be set as small as UNIV_PAGE_SIZE / 2. See the comment above -ut_ad(data_size < sizeof(row_merge_block_t)). */ -typedef byte row_merge_block_t[1048576]; +ut_ad(data_size < sizeof(row_merge_block_t)). +1MB is the default merge-sort block size for innodb */ +typedef byte* row_merge_block_t; /** @brief Secondary buffer for I/O operations of merge records. @@ -184,7 +185,6 @@ row_merge_buf_create_low( row_merge_buf_t* buf; ut_ad(max_tuples > 0); - ut_ad(max_tuples <= sizeof(row_merge_block_t)); ut_ad(max_tuples < buf_size); buf = mem_heap_zalloc(heap, buf_size); @@ -205,19 +205,19 @@ static row_merge_buf_t* row_merge_buf_create( /*=================*/ - dict_index_t* index) /*!< in: secondary index */ + dict_index_t* index, /*!< in: secondary index */ + ulint block_size) /*!< in: merge block buffer size */ { row_merge_buf_t* buf; ulint max_tuples; ulint buf_size; mem_heap_t* heap; - max_tuples = sizeof(row_merge_block_t) - / ut_max(1, dict_index_get_min_size(index)); + max_tuples = block_size / ut_max(1, dict_index_get_min_size(index)); buf_size = (sizeof *buf) + (max_tuples - 1) * sizeof *buf->tuples; - heap = mem_heap_create(buf_size + sizeof(row_merge_block_t)); + heap = mem_heap_create(buf_size + block_size); buf = row_merge_buf_create_low(heap, index, max_tuples, buf_size); @@ -265,8 +265,10 @@ row_merge_buf_add( /*==============*/ row_merge_buf_t* buf, /*!< in/out: sort buffer */ const dtuple_t* row, /*!< in: row in clustered index */ - const row_ext_t* ext) /*!< in: cache of externally stored + const row_ext_t* ext, /*!< in: cache of externally stored column prefixes, or NULL */ + ulint block_size) + /*!< in: merge block buffer size */ { ulint i; ulint n_fields; @@ -391,10 +393,10 @@ row_merge_buf_add( page_zip_rec_needs_ext() limit. However, no further columns will be moved to external storage until the record is inserted to the clustered index B-tree. */ - ut_ad(data_size < sizeof(row_merge_block_t)); + ut_ad(data_size < block_size); /* Reserve one byte for the end marker of row_merge_block_t. */ - if (buf->total_size + data_size >= sizeof(row_merge_block_t) - 1) { + if (buf->total_size + data_size >= block_size - 1) { return(FALSE); } @@ -700,9 +702,11 @@ row_merge_read( ulint offset, /*!< in: offset where to read in number of row_merge_block_t elements */ - row_merge_block_t* buf) /*!< out: data */ + row_merge_block_t buf, /*!< out: data */ + ulint block_size) + /*!< in: merge block buffer size */ { - ib_uint64_t ofs = ((ib_uint64_t) offset) * sizeof *buf; + ib_uint64_t ofs = ((ib_uint64_t) offset) * block_size; ibool success; #ifdef UNIV_DEBUG @@ -715,7 +719,7 @@ row_merge_read( success = os_file_read_no_error_handling(OS_FILE_FROM_FD(fd), buf, (ulint) (ofs & 0xFFFFFFFF), (ulint) (ofs >> 32), - sizeof *buf); + block_size); #ifdef POSIX_FADV_DONTNEED /* Each block is read exactly once. Free up the file cache. */ posix_fadvise(fd, ofs, sizeof *buf, POSIX_FADV_DONTNEED); @@ -740,16 +744,17 @@ row_merge_write( int fd, /*!< in: file descriptor */ ulint offset, /*!< in: offset where to write, in number of row_merge_block_t elements */ - const void* buf) /*!< in: data */ + const void* buf, /*!< in: data */ + ulint block_size) + /*!< in: merge block buffer size */ { - size_t buf_len = sizeof(row_merge_block_t); - ib_uint64_t ofs = buf_len * (ib_uint64_t) offset; + ib_uint64_t ofs = block_size * (ib_uint64_t) offset; ibool ret; ret = os_file_write("(merge)", OS_FILE_FROM_FD(fd), buf, (ulint) (ofs & 0xFFFFFFFF), (ulint) (ofs >> 32), - buf_len); + block_size); #ifdef UNIV_DEBUG if (row_merge_print_block_write) { @@ -761,7 +766,7 @@ row_merge_write( #ifdef POSIX_FADV_DONTNEED /* The block will be needed on the next merge pass, but it can be evicted from the file cache meanwhile. */ - posix_fadvise(fd, ofs, buf_len, POSIX_FADV_DONTNEED); + posix_fadvise(fd, ofs, block_size, POSIX_FADV_DONTNEED); #endif /* POSIX_FADV_DONTNEED */ return(UNIV_LIKELY(ret)); @@ -783,7 +788,9 @@ row_merge_read_rec( const mrec_t** mrec, /*!< out: pointer to merge record, or NULL on end of list (non-NULL on I/O error) */ - ulint* offsets)/*!< out: offsets of mrec */ + ulint* offsets,/*!< out: offsets of mrec */ + ulint block_size) + /*!< in: merge block buffer size */ { ulint extra_size; ulint data_size; @@ -820,7 +827,8 @@ row_merge_read_rec( /* Read another byte of extra_size. */ if (UNIV_UNLIKELY(b >= block[1])) { - if (!row_merge_read(fd, ++(*foffs), block)) { + if (!row_merge_read(fd, ++(*foffs), block[0], + block_size)) { err_exit: /* Signal I/O error. */ *mrec = b; @@ -849,7 +857,8 @@ err_exit: memcpy(*buf, b, avail_size); - if (!row_merge_read(fd, ++(*foffs), block)) { + if (!row_merge_read(fd, ++(*foffs), block[0], + block_size)) { goto err_exit; } @@ -870,7 +879,7 @@ err_exit: /* These overflows should be impossible given that records are much smaller than either buffer, and the record starts near the beginning of each buffer. */ - ut_a(extra_size + data_size < sizeof *buf); + ut_a(extra_size + data_size < block_size); ut_a(b + data_size < block[1]); /* Copy the data bytes. */ @@ -885,7 +894,7 @@ err_exit: rec_init_offsets_comp_ordinary(*mrec, 0, index, offsets); data_size = rec_offs_data_size(offsets); - ut_ad(extra_size + data_size < sizeof *buf); + ut_ad(extra_size + data_size < block_size); b += extra_size + data_size; @@ -910,7 +919,8 @@ err_exit: offsets[3] = (ulint) index; #endif /* UNIV_DEBUG */ - if (!row_merge_read(fd, ++(*foffs), block)) { + if (!row_merge_read(fd, ++(*foffs), block[0], + block_size)) { goto err_exit; } @@ -992,7 +1002,9 @@ row_merge_write_rec( int fd, /*!< in: file descriptor */ ulint* foffs, /*!< in/out: file offset */ const mrec_t* mrec, /*!< in: record to write */ - const ulint* offsets)/*!< in: offsets of mrec */ + const ulint* offsets,/*!< in: offsets of mrec */ + ulint block_size) + /*!< in: merge block buffer size */ { ulint extra_size; ulint size; @@ -1027,11 +1039,12 @@ row_merge_write_rec( record to the head of the new block. */ memcpy(b, buf[0], avail_size); - if (!row_merge_write(fd, (*foffs)++, block)) { + if (!row_merge_write(fd, (*foffs)++, block[0], + block_size)) { return(NULL); } - UNIV_MEM_INVALID(block[0], sizeof block[0]); + UNIV_MEM_INVALID(block[0], block_size); /* Copy the rest. */ b = block[0]; @@ -1056,7 +1069,9 @@ row_merge_write_eof( row_merge_block_t* block, /*!< in/out: file buffer */ byte* b, /*!< in: pointer to end of block */ int fd, /*!< in: file descriptor */ - ulint* foffs) /*!< in/out: file offset */ + ulint* foffs, /*!< in/out: file offset */ + ulint block_size) + /*!< in: merge block buffer size */ { ut_ad(block); ut_ad(b >= block[0]); @@ -1071,18 +1086,19 @@ row_merge_write_eof( *b++ = 0; UNIV_MEM_ASSERT_RW(block[0], b - block[0]); - UNIV_MEM_ASSERT_W(block[0], sizeof block[0]); + UNIV_MEM_ASSERT_W(block[0], block_size); #ifdef UNIV_DEBUG_VALGRIND /* The rest of the block is uninitialized. Initialize it to avoid bogus warnings. */ memset(b, 0xff, block[1] - b); #endif /* UNIV_DEBUG_VALGRIND */ - if (!row_merge_write(fd, (*foffs)++, block)) { + if (!row_merge_write(fd, (*foffs)++, block[0], + block_size)) { return(NULL); } - UNIV_MEM_INVALID(block[0], sizeof block[0]); + UNIV_MEM_INVALID(block[0], block_size); return(block[0]); } @@ -1140,7 +1156,9 @@ row_merge_read_clustered_index( dict_index_t** index, /*!< in: indexes to be created */ merge_file_t* files, /*!< in: temporary files */ ulint n_index,/*!< in: number of indexes to create */ - row_merge_block_t* block) /*!< in/out: file buffer */ + row_merge_block_t* block, /*!< in/out: file buffer */ + ulint block_size) + /*!< in: merge block buffer size */ { dict_index_t* clust_index; /* Clustered index */ mem_heap_t* row_heap; /* Heap memory to create @@ -1168,7 +1186,7 @@ row_merge_read_clustered_index( merge_buf = mem_alloc(n_index * sizeof *merge_buf); for (i = 0; i < n_index; i++) { - merge_buf[i] = row_merge_buf_create(index[i]); + merge_buf[i] = row_merge_buf_create(index[i], block_size); } mtr_start(&mtr); @@ -1300,7 +1318,8 @@ row_merge_read_clustered_index( const dict_index_t* index = buf->index; if (UNIV_LIKELY - (row && row_merge_buf_add(buf, row, ext))) { + (row && row_merge_buf_add(buf, row, ext, + block_size))) { file->n_rec++; continue; } @@ -1335,12 +1354,12 @@ err_exit: row_merge_buf_write(buf, file, block); if (!row_merge_write(file->fd, file->offset++, - block)) { + block[0], block_size)) { err = DB_OUT_OF_FILE_SPACE; goto err_exit; } - UNIV_MEM_INVALID(block[0], sizeof block[0]); + UNIV_MEM_INVALID(block[0], block_size); merge_buf[i] = row_merge_buf_empty(buf); if (UNIV_LIKELY(row != NULL)) { @@ -1349,7 +1368,8 @@ err_exit: and emptied. */ if (UNIV_UNLIKELY - (!row_merge_buf_add(buf, row, ext))) { + (!row_merge_buf_add(buf, row, ext, + block_size))) { /* An empty buffer should have enough room for at least one record. */ ut_error; @@ -1393,14 +1413,16 @@ func_exit: do { \ b2 = row_merge_write_rec(&block[2], &buf[2], b2, \ of->fd, &of->offset, \ - mrec##N, offsets##N); \ + mrec##N, offsets##N, \ + block_size); \ if (UNIV_UNLIKELY(!b2 || ++of->n_rec > file->n_rec)) { \ goto corrupt; \ } \ b##N = row_merge_read_rec(&block[N], &buf[N], \ b##N, index, \ file->fd, foffs##N, \ - &mrec##N, offsets##N); \ + &mrec##N, offsets##N, \ + block_size); \ if (UNIV_UNLIKELY(!b##N)) { \ if (mrec##N) { \ goto corrupt; \ @@ -1425,9 +1447,11 @@ row_merge_blocks( ulint* foffs1, /*!< in/out: offset of second source list in the file */ merge_file_t* of, /*!< in/out: output file */ - struct TABLE* table) /*!< in/out: MySQL table, for + struct TABLE* table, /*!< in/out: MySQL table, for reporting erroneous key value if applicable */ + ulint block_size) + /*!< in: merge block buffer size */ { mem_heap_t* heap; /*!< memory heap for offsets0, offsets1 */ @@ -1457,8 +1481,10 @@ row_merge_blocks( /* Write a record and read the next record. Split the output file in two halves, which can be merged on the following pass. */ - if (!row_merge_read(file->fd, *foffs0, &block[0]) - || !row_merge_read(file->fd, *foffs1, &block[1])) { + if (!row_merge_read(file->fd, *foffs0, block[0], + block_size) + || !row_merge_read(file->fd, *foffs1, block[1], + block_size)) { corrupt: mem_heap_free(heap); return(DB_CORRUPTION); @@ -1469,9 +1495,9 @@ corrupt: b2 = block[2]; b0 = row_merge_read_rec(&block[0], &buf[0], b0, index, file->fd, - foffs0, &mrec0, offsets0); + foffs0, &mrec0, offsets0, block_size); b1 = row_merge_read_rec(&block[1], &buf[1], b1, index, file->fd, - foffs1, &mrec1, offsets1); + foffs1, &mrec1, offsets1, block_size); if (UNIV_UNLIKELY(!b0 && mrec0) || UNIV_UNLIKELY(!b1 && mrec1)) { @@ -1521,7 +1547,8 @@ done0: done1: mem_heap_free(heap); - b2 = row_merge_write_eof(&block[2], b2, of->fd, &of->offset); + b2 = row_merge_write_eof(&block[2], b2, of->fd, &of->offset, + block_size); return(b2 ? DB_SUCCESS : DB_CORRUPTION); } @@ -1536,7 +1563,9 @@ row_merge_blocks_copy( const merge_file_t* file, /*!< in: input file */ row_merge_block_t* block, /*!< in/out: 3 buffers */ ulint* foffs0, /*!< in/out: input file offset */ - merge_file_t* of) /*!< in/out: output file */ + merge_file_t* of, /*!< in/out: output file */ + ulint block_size) + /*!< in: merge block buffer size */ { mem_heap_t* heap; /*!< memory heap for offsets0, offsets1 */ @@ -1563,7 +1592,7 @@ row_merge_blocks_copy( /* Write a record and read the next record. Split the output file in two halves, which can be merged on the following pass. */ - if (!row_merge_read(file->fd, *foffs0, &block[0])) { + if (!row_merge_read(file->fd, *foffs0, block[0], block_size)) { corrupt: mem_heap_free(heap); return(FALSE); @@ -1573,7 +1602,7 @@ corrupt: b2 = block[2]; b0 = row_merge_read_rec(&block[0], &buf[0], b0, index, file->fd, - foffs0, &mrec0, offsets0); + foffs0, &mrec0, offsets0, block_size); if (UNIV_UNLIKELY(!b0 && mrec0)) { goto corrupt; @@ -1592,8 +1621,8 @@ done0: (*foffs0)++; mem_heap_free(heap); - return(row_merge_write_eof(&block[2], b2, of->fd, &of->offset) - != NULL); + return(row_merge_write_eof(&block[2], b2, of->fd, &of->offset, + block_size) != NULL); } /*************************************************************//** @@ -1614,9 +1643,10 @@ row_merge( if applicable */ ulint* num_run,/*!< in/out: Number of runs remain to be merged */ - ulint* run_offset) /*!< in/out: Array contains the + ulint* run_offset, /*!< in/out: Array contains the first offset number for each merge run */ + ulint block_size) /*!< in: merge block buffer size */ { ulint foffs0; /*!< first input offset */ ulint foffs1; /*!< second input offset */ @@ -1627,7 +1657,7 @@ row_merge( ulint n_run = 0; /*!< num of runs generated from this merge */ - UNIV_MEM_ASSERT_W(block[0], 3 * sizeof block[0]); + UNIV_MEM_ASSERT_W(block[0], 3 * block_size); ut_ad(ihalf < file->offset); @@ -1659,7 +1689,8 @@ row_merge( run_offset[n_run++] = of.offset; error = row_merge_blocks(index, file, block, - &foffs0, &foffs1, &of, table); + &foffs0, &foffs1, &of, table, + block_size); if (error != DB_SUCCESS) { return(error); @@ -1677,7 +1708,8 @@ row_merge( /* Remember the offset number for this run */ run_offset[n_run++] = of.offset; - if (!row_merge_blocks_copy(index, file, block, &foffs0, &of)) { + if (!row_merge_blocks_copy(index, file, block, &foffs0, &of, + block_size)) { return(DB_CORRUPTION); } } @@ -1692,7 +1724,8 @@ row_merge( /* Remember the offset number for this run */ run_offset[n_run++] = of.offset; - if (!row_merge_blocks_copy(index, file, block, &foffs1, &of)) { + if (!row_merge_blocks_copy(index, file, block, &foffs1, &of, + block_size)) { return(DB_CORRUPTION); } } @@ -1721,7 +1754,7 @@ row_merge( *tmpfd = file->fd; *file = of; - UNIV_MEM_INVALID(block[0], 3 * sizeof block[0]); + UNIV_MEM_INVALID(block[0], 3 * block_size); return(DB_SUCCESS); } @@ -1739,9 +1772,11 @@ row_merge_sort( index entries */ row_merge_block_t* block, /*!< in/out: 3 buffers */ int* tmpfd, /*!< in/out: temporary file handle */ - struct TABLE* table) /*!< in/out: MySQL table, for + struct TABLE* table, /*!< in/out: MySQL table, for reporting erroneous key value if applicable */ + ulint block_size) + /*!< in: merge block buffer size */ { ulint half = file->offset / 2; ulint num_runs; @@ -1770,7 +1805,7 @@ row_merge_sort( /* Merge the runs until we have one big run */ do { error = row_merge(trx, index, file, block, tmpfd, - table, &num_runs, run_offset); + table, &num_runs, run_offset, block_size); UNIV_MEM_ASSERT_RW(run_offset, num_runs * sizeof *run_offset); @@ -1841,7 +1876,9 @@ row_merge_insert_index_tuples( ulint zip_size,/*!< in: compressed page size of the old table, or 0 if uncompressed */ int fd, /*!< in: file descriptor */ - row_merge_block_t* block) /*!< in/out: file buffer */ + row_merge_block_t* block, /*!< in/out: file buffer */ + ulint block_size) + /*! in: merge block buffer size */ { const byte* b; que_thr_t* thr; @@ -1880,7 +1917,7 @@ row_merge_insert_index_tuples( b = *block; - if (!row_merge_read(fd, foffs, block)) { + if (!row_merge_read(fd, foffs, block[0], block_size)) { error = DB_CORRUPTION; } else { mrec_buf_t* buf = mem_heap_alloc(graph_heap, sizeof *buf); @@ -1891,7 +1928,8 @@ row_merge_insert_index_tuples( ulint n_ext; b = row_merge_read_rec(block, buf, b, index, - fd, &foffs, &mrec, offsets); + fd, &foffs, &mrec, offsets, + block_size); if (UNIV_UNLIKELY(!b)) { /* End of list, or I/O error */ if (mrec) { @@ -2656,11 +2694,16 @@ row_merge_build_indexes( if applicable */ { merge_file_t* merge_files; - row_merge_block_t* block; + /* Some code uses block[1] as the synonym for block + block_size. So + we initialize block[3] to the address boundary of block[2], even + though space for 3 only buffers is allocated. */ + row_merge_block_t block[4]; ulint block_size; ulint i; ulint error; int tmpfd; + ulint merge_sort_block_size; + void* block_mem; ut_ad(trx); ut_ad(old_table); @@ -2668,14 +2711,21 @@ row_merge_build_indexes( ut_ad(indexes); ut_ad(n_indexes); + merge_sort_block_size = thd_merge_sort_block_size(trx->mysql_thd); + trx_start_if_not_started(trx); /* Allocate memory for merge file data structure and initialize fields */ merge_files = mem_alloc(n_indexes * sizeof *merge_files); - block_size = 3 * sizeof *block; - block = os_mem_alloc_large(&block_size); + block_size = 3 * merge_sort_block_size; + block_mem = os_mem_alloc_large(&block_size); + + for (i = 0; i < UT_ARR_SIZE(block); i++) { + block[i] = (row_merge_block_t ) ((byte *) block_mem + + i * merge_sort_block_size); + } for (i = 0; i < n_indexes; i++) { @@ -2693,7 +2743,7 @@ row_merge_build_indexes( error = row_merge_read_clustered_index( trx, table, old_table, new_table, indexes, - merge_files, n_indexes, block); + merge_files, n_indexes, block, merge_sort_block_size); if (error != DB_SUCCESS) { @@ -2705,13 +2755,15 @@ row_merge_build_indexes( for (i = 0; i < n_indexes; i++) { error = row_merge_sort(trx, indexes[i], &merge_files[i], - block, &tmpfd, table); + block, &tmpfd, table, + merge_sort_block_size); if (error == DB_SUCCESS) { error = row_merge_insert_index_tuples( trx, indexes[i], new_table, dict_table_zip_size(old_table), - merge_files[i].fd, block); + merge_files[i].fd, block, + merge_sort_block_size); } /* Close the temporary file to free up space. */ @@ -2734,7 +2786,7 @@ func_exit: } mem_free(merge_files); - os_mem_free_large(block, block_size); + os_mem_free_large(block_mem, block_size); return(error); } diff --git a/row/row0vers.c b/row/row0vers.c index 5fd7d082194..6d83dbaf8ee 100644 --- a/row/row0vers.c +++ b/row/row0vers.c @@ -209,17 +209,6 @@ row_vers_impl_x_locked_off_kernel( prev_trx_id = row_get_rec_trx_id(prev_version, clust_index, clust_offsets); - /* If the trx_id and prev_trx_id are different and if - the prev_version is marked deleted then the - prev_trx_id must have already committed for the trx_id - to be able to modify the row. Therefore, prev_trx_id - cannot hold any implicit lock. */ - if (vers_del && trx_id != prev_trx_id) { - - mutex_enter(&kernel_mutex); - break; - } - /* The stack of versions is locked by mtr. Thus, it is safe to fetch the prefixes for externally stored columns. */ diff --git a/trx/trx0sys.c b/trx/trx0sys.c index 89fab47a0ad..f46562eaecb 100644 --- a/trx/trx0sys.c +++ b/trx/trx0sys.c @@ -137,12 +137,12 @@ UNIV_INTERN mysql_pfs_key_t trx_doublewrite_mutex_key; UNIV_INTERN mysql_pfs_key_t file_format_max_mutex_key; #endif /* UNIV_PFS_MUTEX */ +#ifndef UNIV_HOTBACKUP #ifdef UNIV_DEBUG /* Flag to control TRX_RSEG_N_SLOTS behavior debugging. */ uint trx_rseg_n_slots_debug = 0; #endif -#ifndef UNIV_HOTBACKUP /** This is used to track the maximum file format id known to InnoDB. It's updated via SET GLOBAL innodb_file_format_max = 'x' or when we open or create a table. */ diff --git a/ut/ut0dbg.c b/ut/ut0dbg.c index 64fadd76d1c..53ed4a53044 100644 --- a/ut/ut0dbg.c +++ b/ut/ut0dbg.c @@ -25,7 +25,9 @@ Created 1/30/1994 Heikki Tuuri #include "univ.i" #include "ut0dbg.h" -#include "ha_prototypes.h" +#ifndef UNIV_HOTBACKUP +# include "ha_prototypes.h" +#endif /* !UNIV_HOTBACKUP */ #if defined(__GNUC__) && (__GNUC__ > 2) #else @@ -56,7 +58,7 @@ ut_dbg_assertion_failed( ut_print_timestamp(stderr); #ifdef UNIV_HOTBACKUP fprintf(stderr, " InnoDB: Assertion failure in file %s line %lu\n", - innobase_basename(file), line); + file, line); #else /* UNIV_HOTBACKUP */ fprintf(stderr, " InnoDB: Assertion failure in thread %lu" diff --git a/ut/ut0ut.c b/ut/ut0ut.c index 117a777cb98..2fe45aad2a7 100644 --- a/ut/ut0ut.c +++ b/ut/ut0ut.c @@ -245,7 +245,9 @@ ut_print_timestamp( (int)cal_tm.wMinute, (int)cal_tm.wSecond); #else +#ifdef HAVE_LOCALTIME_R struct tm cal_tm; +#endif struct tm* cal_tm_ptr; time_t tm; @@ -288,7 +290,9 @@ ut_sprintf_timestamp( (int)cal_tm.wMinute, (int)cal_tm.wSecond); #else +#ifdef HAVE_LOCALTIME_R struct tm cal_tm; +#endif struct tm* cal_tm_ptr; time_t tm; @@ -333,7 +337,9 @@ ut_sprintf_timestamp_without_extra_chars( (int)cal_tm.wMinute, (int)cal_tm.wSecond); #else +#ifdef HAVE_LOCALTIME_R struct tm cal_tm; +#endif struct tm* cal_tm_ptr; time_t tm; @@ -374,7 +380,9 @@ ut_get_year_month_day( *month = (ulint)cal_tm.wMonth; *day = (ulint)cal_tm.wDay; #else +#ifdef HAVE_LOCALTIME_R struct tm cal_tm; +#endif struct tm* cal_tm_ptr; time_t tm; From 24b9d7e43f8251263863f52bfefb00eacf2523ae Mon Sep 17 00:00:00 2001 From: Sergei Golubchik Date: Wed, 5 Sep 2012 13:15:05 +0200 Subject: [PATCH 155/164] sys_vars.expensive_subquery_limit_basic --- mysql-test/suite/sys_vars/r/all_vars.result | 1 - .../r/expensive_subquery_limit_basic.result | 52 +++++++++++++++++++ .../t/expensive_subquery_limit_basic.test | 38 ++++++++++++++ 3 files changed, 90 insertions(+), 1 deletion(-) create mode 100644 mysql-test/suite/sys_vars/r/expensive_subquery_limit_basic.result create mode 100644 mysql-test/suite/sys_vars/t/expensive_subquery_limit_basic.test diff --git a/mysql-test/suite/sys_vars/r/all_vars.result b/mysql-test/suite/sys_vars/r/all_vars.result index 692545ae0fb..1bd4e394f6a 100644 --- a/mysql-test/suite/sys_vars/r/all_vars.result +++ b/mysql-test/suite/sys_vars/r/all_vars.result @@ -10,6 +10,5 @@ there should be *no* long test name listed below: select distinct variable_name as `there should be *no* variables listed below:` from t2 left join t1 on variable_name=test_name where test_name is null; there should be *no* variables listed below: -expensive_subquery_limit drop table t1; drop table t2; diff --git a/mysql-test/suite/sys_vars/r/expensive_subquery_limit_basic.result b/mysql-test/suite/sys_vars/r/expensive_subquery_limit_basic.result new file mode 100644 index 00000000000..1617de21001 --- /dev/null +++ b/mysql-test/suite/sys_vars/r/expensive_subquery_limit_basic.result @@ -0,0 +1,52 @@ +SET @start_global_value = @@global.expensive_subquery_limit; +SELECT @start_global_value; +@start_global_value +100 +select @@global.expensive_subquery_limit; +@@global.expensive_subquery_limit +100 +select @@session.expensive_subquery_limit; +@@session.expensive_subquery_limit +100 +show global variables like 'expensive_subquery_limit'; +Variable_name Value +expensive_subquery_limit 100 +show session variables like 'expensive_subquery_limit'; +Variable_name Value +expensive_subquery_limit 100 +select * from information_schema.global_variables where variable_name='expensive_subquery_limit'; +VARIABLE_NAME VARIABLE_VALUE +EXPENSIVE_SUBQUERY_LIMIT 100 +select * from information_schema.session_variables where variable_name='expensive_subquery_limit'; +VARIABLE_NAME VARIABLE_VALUE +EXPENSIVE_SUBQUERY_LIMIT 100 +set global expensive_subquery_limit=10; +set session expensive_subquery_limit=20; +select @@global.expensive_subquery_limit; +@@global.expensive_subquery_limit +10 +select @@session.expensive_subquery_limit; +@@session.expensive_subquery_limit +20 +show global variables like 'expensive_subquery_limit'; +Variable_name Value +expensive_subquery_limit 10 +show session variables like 'expensive_subquery_limit'; +Variable_name Value +expensive_subquery_limit 20 +select * from information_schema.global_variables where variable_name='expensive_subquery_limit'; +VARIABLE_NAME VARIABLE_VALUE +EXPENSIVE_SUBQUERY_LIMIT 10 +select * from information_schema.session_variables where variable_name='expensive_subquery_limit'; +VARIABLE_NAME VARIABLE_VALUE +EXPENSIVE_SUBQUERY_LIMIT 20 +set global expensive_subquery_limit=1.1; +ERROR 42000: Incorrect argument type to variable 'expensive_subquery_limit' +set global expensive_subquery_limit=1e1; +ERROR 42000: Incorrect argument type to variable 'expensive_subquery_limit' +set global expensive_subquery_limit="foo"; +ERROR 42000: Incorrect argument type to variable 'expensive_subquery_limit' +SET @@global.expensive_subquery_limit = @start_global_value; +SELECT @@global.expensive_subquery_limit; +@@global.expensive_subquery_limit +100 diff --git a/mysql-test/suite/sys_vars/t/expensive_subquery_limit_basic.test b/mysql-test/suite/sys_vars/t/expensive_subquery_limit_basic.test new file mode 100644 index 00000000000..c86433e94f5 --- /dev/null +++ b/mysql-test/suite/sys_vars/t/expensive_subquery_limit_basic.test @@ -0,0 +1,38 @@ +SET @start_global_value = @@global.expensive_subquery_limit; +SELECT @start_global_value; + +# +# exists as global and session +# +select @@global.expensive_subquery_limit; +select @@session.expensive_subquery_limit; +show global variables like 'expensive_subquery_limit'; +show session variables like 'expensive_subquery_limit'; +select * from information_schema.global_variables where variable_name='expensive_subquery_limit'; +select * from information_schema.session_variables where variable_name='expensive_subquery_limit'; + +# +# show that it's writable +# +set global expensive_subquery_limit=10; +set session expensive_subquery_limit=20; +select @@global.expensive_subquery_limit; +select @@session.expensive_subquery_limit; +show global variables like 'expensive_subquery_limit'; +show session variables like 'expensive_subquery_limit'; +select * from information_schema.global_variables where variable_name='expensive_subquery_limit'; +select * from information_schema.session_variables where variable_name='expensive_subquery_limit'; + +# +# incorrect types +# +--error ER_WRONG_TYPE_FOR_VAR +set global expensive_subquery_limit=1.1; +--error ER_WRONG_TYPE_FOR_VAR +set global expensive_subquery_limit=1e1; +--error ER_WRONG_TYPE_FOR_VAR +set global expensive_subquery_limit="foo"; + +SET @@global.expensive_subquery_limit = @start_global_value; +SELECT @@global.expensive_subquery_limit; + From d618dfe32dfe004f3bfd6aa79a4fb96d1cc7999d Mon Sep 17 00:00:00 2001 From: Michael Widenius Date: Wed, 5 Sep 2012 18:23:51 +0300 Subject: [PATCH 156/164] Added function last_value() which returns the last value but evalutes all arguments as a side effect. Original patch by Eric Herman client/mysql.cc: Added LAST_VALUE mysql-test/r/last_value.result: Testing of LAST_VALUE mysql-test/t/last_value.test: Testing of LAST_VALUE sql/item_func.cc: Added LAST_VALUE() sql/item_func.h: Added LAST_VALUE() sql/lex.h: Added LAST_VALUE() sql/sql_yacc.yy: Added LAST_VALUE() --- client/mysql.cc | 1 + mysql-test/r/last_value.result | 73 ++++++++++++++++++++++++++++++++++ mysql-test/t/last_value.test | 43 ++++++++++++++++++++ sql/item_func.cc | 59 +++++++++++++++++++++++++++ sql/item_func.h | 21 ++++++++++ sql/lex.h | 1 + sql/sql_yacc.yy | 8 ++++ 7 files changed, 206 insertions(+) create mode 100644 mysql-test/r/last_value.result create mode 100644 mysql-test/t/last_value.test diff --git a/client/mysql.cc b/client/mysql.cc index d39e765a99a..5aab3e1098f 100644 --- a/client/mysql.cc +++ b/client/mysql.cc @@ -897,6 +897,7 @@ static COMMANDS commands[] = { { "LAST_INSERT_ID", 0, 0, 0, ""}, { "ISSIMPLE", 0, 0, 0, ""}, { "LAST_DAY", 0, 0, 0, ""}, + { "LAST_VALUE", 0, 0, 0, ""}, { "LCASE", 0, 0, 0, ""}, { "LEAST", 0, 0, 0, ""}, { "LENGTH", 0, 0, 0, ""}, diff --git a/mysql-test/r/last_value.result b/mysql-test/r/last_value.result new file mode 100644 index 00000000000..6222eacd4f0 --- /dev/null +++ b/mysql-test/r/last_value.result @@ -0,0 +1,73 @@ +drop table if exists t1; +drop database if exists mysqltest; +CREATE TABLE t1 (a INT, b INT, c INT, d INT); +INSERT INTO t1 VALUES (1,3,0,NULL),(2,2,0,NULL),(3,4,0,NULL),(4,2,0,NULL); +SELECT * FROM t1; +a b c d +1 3 0 NULL +2 2 0 NULL +3 4 0 NULL +4 2 0 NULL +UPDATE t1 SET c=LAST_VALUE(@last_a:=a,@last_b:=b,@last_c:=c,1), d=4211 WHERE c=0 ORDER BY b DESC LIMIT 1; +SELECT @last_a, @last_b, @last_c; +@last_a @last_b @last_c +3 4 0 +SELECT * FROM t1; +a b c d +1 3 0 NULL +2 2 0 NULL +3 4 1 4211 +4 2 0 NULL +DROP TABLE t1; +SELECT LAST_VALUE(@last_a:=1,@last_b:=1); +Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr +def LAST_VALUE(@last_a:=1,@last_b:=1) 8 1 1 N 32897 0 63 +LAST_VALUE(@last_a:=1,@last_b:=1) +1 +select @last_b; +Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr +def @last_b 8 20 1 Y 32896 0 63 +@last_b +1 +SELECT LAST_VALUE(@last_a:=1,@last_b:=1.0); +Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr +def LAST_VALUE(@last_a:=1,@last_b:=1.0) 246 4 3 N 32897 1 63 +LAST_VALUE(@last_a:=1,@last_b:=1.0) +1.0 +select @last_b; +Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr +def @last_b 246 83 3 Y 32896 30 63 +@last_b +1.0 +SELECT LAST_VALUE(@last_a:=1,@last_b:="hello"); +Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr +def LAST_VALUE(@last_a:=1,@last_b:="hello") 253 5 5 N 1 31 8 +LAST_VALUE(@last_a:=1,@last_b:="hello") +hello +select @last_b; +Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr +def @last_b 250 16777215 5 Y 0 31 8 +@last_b +hello +SELECT date(LAST_VALUE(@last_a:=1,@last_b:="2001-02-03")); +Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr +def date(LAST_VALUE(@last_a:=1,@last_b:="2001-02-03")) 10 10 10 Y 128 0 63 +date(LAST_VALUE(@last_a:=1,@last_b:="2001-02-03")) +2001-02-03 +select @last_b; +Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr +def @last_b 250 16777215 10 Y 0 31 8 +@last_b +2001-02-03 +SELECT LAST_VALUE(@last_a:=1,@last_b:="2001-02-03",NULL); +Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr +def LAST_VALUE(@last_a:=1,@last_b:="2001-02-03",NULL) 6 0 0 Y 32896 0 63 +LAST_VALUE(@last_a:=1,@last_b:="2001-02-03",NULL) +NULL +select @last_b; +Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr +def @last_b 250 16777215 10 Y 0 31 8 +@last_b +2001-02-03 +SELECT LAST_VALUE(); +ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ')' at line 1 diff --git a/mysql-test/t/last_value.test b/mysql-test/t/last_value.test new file mode 100644 index 00000000000..ee793f879da --- /dev/null +++ b/mysql-test/t/last_value.test @@ -0,0 +1,43 @@ +# +# Tests for the LAST_VALUE function +# + +--disable_warnings +drop table if exists t1; +drop database if exists mysqltest; +--enable_warnings + +# CREATE TABLE `queue` ( +# `id` int(10) unsigned NOT NULL AUTO_INCREMENT, +# `priority` int(11) DEFAULT NULL, +# `state` int(11) DEFAULT NULL, +# `pid` int(10) unsigned DEFAULT NULL, +# `dat` varbinary(200) DEFAULT NULL, +# PRIMARY KEY (`id`) +# ) + +CREATE TABLE t1 (a INT, b INT, c INT, d INT); +INSERT INTO t1 VALUES (1,3,0,NULL),(2,2,0,NULL),(3,4,0,NULL),(4,2,0,NULL); +SELECT * FROM t1; +UPDATE t1 SET c=LAST_VALUE(@last_a:=a,@last_b:=b,@last_c:=c,1), d=4211 WHERE c=0 ORDER BY b DESC LIMIT 1; +SELECT @last_a, @last_b, @last_c; +SELECT * FROM t1; +DROP TABLE t1; + +# +# Test with different types +# +--enable_metadata +SELECT LAST_VALUE(@last_a:=1,@last_b:=1); +select @last_b; +SELECT LAST_VALUE(@last_a:=1,@last_b:=1.0); +select @last_b; +SELECT LAST_VALUE(@last_a:=1,@last_b:="hello"); +select @last_b; +SELECT date(LAST_VALUE(@last_a:=1,@last_b:="2001-02-03")); +select @last_b; +SELECT LAST_VALUE(@last_a:=1,@last_b:="2001-02-03",NULL); +select @last_b; +--disable_metadata +--error ER_PARSE_ERROR +SELECT LAST_VALUE(); diff --git a/sql/item_func.cc b/sql/item_func.cc index 7a7cdd4ba02..1e891f06f0b 100644 --- a/sql/item_func.cc +++ b/sql/item_func.cc @@ -6816,3 +6816,62 @@ longlong Item_func_uuid_short::val_int() mysql_mutex_unlock(&LOCK_short_uuid_generator); return (longlong) val; } + + +/** + Last_value - return last argument. +*/ + +void Item_func_last_value::evaluate_sideeffects() +{ + DBUG_ASSERT(fixed == 1 && arg_count > 0); + for (uint i= 0; i < arg_count-1 ; i++) + args[i]->val_int(); +} + +String *Item_func_last_value::val_str(String *str) +{ + String *tmp; + evaluate_sideeffects(); + tmp= last_value->val_str(str); + null_value= last_value->null_value; + return tmp; +} + +longlong Item_func_last_value::val_int() +{ + longlong tmp; + evaluate_sideeffects(); + tmp= last_value->val_int(); + null_value= last_value->null_value; + return tmp; +} + +double Item_func_last_value::val_real() +{ + double tmp; + evaluate_sideeffects(); + tmp= last_value->val_real(); + null_value= last_value->null_value; + return tmp; +} + +my_decimal *Item_func_last_value::val_decimal(my_decimal *decimal_value) +{ + my_decimal *tmp; + evaluate_sideeffects(); + tmp= last_value->val_decimal(decimal_value); + null_value= last_value->null_value; + return tmp; +} + + +void Item_func_last_value::fix_length_and_dec() +{ + last_value= args[arg_count -1]; + decimals= last_value->decimals; + max_length= last_value->max_length; + collation.set(last_value->collation.collation); + maybe_null= last_value->maybe_null; + unsigned_flag= last_value->unsigned_flag; +} diff --git a/sql/item_func.h b/sql/item_func.h index 111479c8e52..586444e0e4e 100644 --- a/sql/item_func.h +++ b/sql/item_func.h @@ -2003,6 +2003,27 @@ public: } }; + +class Item_func_last_value :public Item_func +{ +protected: + Item *last_value; +public: + Item_func_last_value(List &list) :Item_func(list) {} + double val_real(); + longlong val_int(); + String *val_str(String *); + my_decimal *val_decimal(my_decimal *); + void fix_length_and_dec(); + enum Item_result result_type () const { return last_value->result_type(); } + const char *func_name() const { return "last_value"; } + table_map not_null_tables() const { return 0; } + enum_field_types field_type() const { return last_value->field_type(); } + bool const_item() const { return 0; } + void evaluate_sideeffects(); +}; + + Item *get_system_var(THD *thd, enum_var_type var_type, LEX_STRING name, LEX_STRING component); extern bool check_reserved_words(LEX_STRING *name); diff --git a/sql/lex.h b/sql/lex.h index 9f4369630a0..9bf4c439cb6 100644 --- a/sql/lex.h +++ b/sql/lex.h @@ -302,6 +302,7 @@ static SYMBOL symbols[] = { { "KILL", SYM(KILL_SYM)}, { "LANGUAGE", SYM(LANGUAGE_SYM)}, { "LAST", SYM(LAST_SYM)}, + { "LAST_VALUE", SYM(LAST_VALUE)}, { "LEADING", SYM(LEADING)}, { "LEAVE", SYM(LEAVE_SYM)}, { "LEAVES", SYM(LEAVES)}, diff --git a/sql/sql_yacc.yy b/sql/sql_yacc.yy index 220eeb5b9a7..555efaf366d 100644 --- a/sql/sql_yacc.yy +++ b/sql/sql_yacc.yy @@ -1064,6 +1064,7 @@ bool my_yyoverflow(short **a, YYSTYPE **b, ulong *yystacksize); %token KILL_SYM %token LANGUAGE_SYM /* SQL-2003-R */ %token LAST_SYM /* SQL-2003-N */ +%token LAST_VALUE %token LE /* OPERATOR */ %token LEADING /* SQL-2003-R */ %token LEAVES @@ -8890,6 +8891,12 @@ function_call_conflict: if ($$ == NULL) MYSQL_YYABORT; } + | LAST_VALUE '(' expr_list ')' + { + $$= new (YYTHD->mem_root) Item_func_last_value(* $3); + if ($$ == NULL) + MYSQL_YYABORT; + } | MICROSECOND_SYM '(' expr ')' { $$= new (YYTHD->mem_root) Item_func_microsecond($3); @@ -13088,6 +13095,7 @@ keyword_sp: | ISSUER_SYM {} | INSERT_METHOD {} | KEY_BLOCK_SIZE {} + | LAST_VALUE {} | LAST_SYM {} | LEAVES {} | LESS_SYM {} From 54bb28d4a151d0eb5c3b74edb40ddf6e118c124b Mon Sep 17 00:00:00 2001 From: unknown Date: Wed, 5 Sep 2012 23:23:58 +0300 Subject: [PATCH 157/164] MDEV-486 LP BUG#1010116 fix. Link view/derived table fields to a real table to check turning the table record to null row. Item_direct_view_ref wrapper now checks if table is turned to null row. --- mysql-test/r/derived_view.result | 6 +- mysql-test/r/view.result | 33 ++++++++++ mysql-test/t/view.test | 30 +++++++++ sql/item.cc | 1 + sql/item.h | 103 ++++++++++++++++++++++++++++--- sql/table.cc | 22 +++++++ sql/table.h | 1 + 7 files changed, 184 insertions(+), 12 deletions(-) diff --git a/mysql-test/r/derived_view.result b/mysql-test/r/derived_view.result index a4f7a71dcb5..6061fbb8800 100644 --- a/mysql-test/r/derived_view.result +++ b/mysql-test/r/derived_view.result @@ -1677,7 +1677,6 @@ SELECT t.b, t.c, t1.a FROM t1, (SELECT t2.b, t2.c FROM t3 RIGHT JOIN t2 ON t2.a = t3.b) AS t WHERE t.b AND t.c = t1.a; b c a -8 c c EXPLAIN EXTENDED SELECT t.b, t.c, t1.a FROM t1, (SELECT t2.b, t2.c FROM t3 RIGHT JOIN t2 ON t2.a = t3.b) AS t @@ -1692,7 +1691,6 @@ SELECT t.b, t.c, t1.a FROM t1, (SELECT t2.b, t2.c FROM t3 RIGHT JOIN t2 ON t2.a = t3.b) AS t WHERE t.b <> 0 AND t.c = t1.a; b c a -8 c c INSERT INTO t3 VALUES (100), (200); EXPLAIN EXTENDED SELECT t.b, t.c, t1.a @@ -1708,7 +1706,7 @@ SELECT t.b, t.c, t1.a FROM t1, (SELECT t2.b, t2.c FROM t3 RIGHT JOIN t2 ON t2.a = t3.b) AS t WHERE t.b AND t.c = t1.a; b c a -8 c c +NULL NULL c EXPLAIN EXTENDED SELECT t.b, t.c, t1.a FROM t1, (SELECT t2.b, t2.c FROM t3 RIGHT JOIN t2 ON t2.a = t3.b) AS t @@ -1723,7 +1721,7 @@ SELECT t.b, t.c, t1.a FROM t1, (SELECT t2.b, t2.c FROM t3 RIGHT JOIN t2 ON t2.a = t3.b) AS t WHERE t.b <> 0 AND t.c = t1.a; b c a -8 c c +NULL NULL c SET optimizer_switch=@save_optimizer_switch; DROP TABLE t1,t2,t3; # diff --git a/mysql-test/r/view.result b/mysql-test/r/view.result index 56598583bb6..fc60d70317e 100644 --- a/mysql-test/r/view.result +++ b/mysql-test/r/view.result @@ -4485,6 +4485,39 @@ a 1 drop view v2,v1; drop table t1; +# +# MDEV-486 LP BUG#1010116 Incorrect query results in +# view and derived tables +# +SELECT +`Derived1`.`id`, +`Derived2`.`Val1` +FROM (select 30631 as `id`) AS `Derived1` LEFT OUTER JOIN (SELECT +2 as `id`, +1 AS `Val1` +FROM (select 30631 as `id`) AS `Derived3`) AS `Derived2` ON `Derived1`.`id` = `Derived2`.`id`; +id Val1 +30631 NULL +create table t1 ( id int ); +insert into t1 values (30631); +create table t2 ( id int ); +insert into t2 values (30631); +create algorithm=MERGE view v2 as select 2 as id, 1 as val1 from t2; +select t1.*, v2.* from t1 left join v2 on t1.id = v2.id; +id id val1 +30631 NULL NULL +drop view v2; +drop table t1,t2; +create table t1 ( id int ); +insert into t1 values (30631); +create table t2 ( id int ); +insert into t2 values (30631); +create algorithm=MERGE view v2 as select 2 as id, id is null as bbb, id as iddqd, 1 as val1 from t2; +select t1.*, v2.* from t1 left join v2 on t1.id = v2.id; +id id bbb iddqd val1 +30631 NULL NULL NULL NULL +drop view v2; +drop table t1,t2; # ----------------------------------------------------------------- # -- End of 5.3 tests. # ----------------------------------------------------------------- diff --git a/mysql-test/t/view.test b/mysql-test/t/view.test index 6f11d6909ea..bd3b485034d 100644 --- a/mysql-test/t/view.test +++ b/mysql-test/t/view.test @@ -4433,6 +4433,36 @@ select * from t1; drop view v2,v1; drop table t1; +--echo # +--echo # MDEV-486 LP BUG#1010116 Incorrect query results in +--echo # view and derived tables +--echo # + +SELECT +`Derived1`.`id`, +`Derived2`.`Val1` +FROM (select 30631 as `id`) AS `Derived1` LEFT OUTER JOIN (SELECT +2 as `id`, +1 AS `Val1` +FROM (select 30631 as `id`) AS `Derived3`) AS `Derived2` ON `Derived1`.`id` = `Derived2`.`id`; + +create table t1 ( id int ); +insert into t1 values (30631); +create table t2 ( id int ); +insert into t2 values (30631); +create algorithm=MERGE view v2 as select 2 as id, 1 as val1 from t2; +select t1.*, v2.* from t1 left join v2 on t1.id = v2.id; +drop view v2; +drop table t1,t2; + +create table t1 ( id int ); +insert into t1 values (30631); +create table t2 ( id int ); +insert into t2 values (30631); +create algorithm=MERGE view v2 as select 2 as id, id is null as bbb, id as iddqd, 1 as val1 from t2; +select t1.*, v2.* from t1 left join v2 on t1.id = v2.id; +drop view v2; +drop table t1,t2; --echo # ----------------------------------------------------------------- --echo # -- End of 5.3 tests. --echo # ----------------------------------------------------------------- diff --git a/sql/item.cc b/sql/item.cc index bb6360f3f73..18a86aa2d1a 100644 --- a/sql/item.cc +++ b/sql/item.cc @@ -7339,6 +7339,7 @@ Item* Item_cache_wrapper::get_tmp_table_item(THD *thd_arg) bool Item_direct_view_ref::fix_fields(THD *thd, Item **reference) { + DBUG_ASSERT(1); /* view fild reference must be defined */ DBUG_ASSERT(*ref); /* (*ref)->check_cols() will be made in Item_direct_ref::fix_fields */ diff --git a/sql/item.h b/sql/item.h index 055225a79d7..5dde9cf9a3f 100644 --- a/sql/item.h +++ b/sql/item.h @@ -2925,20 +2925,29 @@ class Item_direct_view_ref :public Item_direct_ref { Item_equal *item_equal; TABLE_LIST *view; + TABLE *null_ref_table; + + bool check_null_ref() + { + if (null_ref_table == NULL) + { + null_ref_table= view->get_real_join_table(); + } + if (null_ref_table->null_row) + { + null_value= 1; + return TRUE; + } + return FALSE; + } public: Item_direct_view_ref(Name_resolution_context *context_arg, Item **item, const char *table_name_arg, const char *field_name_arg, TABLE_LIST *view_arg) :Item_direct_ref(context_arg, item, table_name_arg, field_name_arg), - item_equal(0), view(view_arg) {} - /* Constructor need to process subselect with temporary tables (see Item) */ - Item_direct_view_ref(THD *thd, Item_direct_ref *item) - :Item_direct_ref(thd, item), item_equal(0) {} - Item_direct_view_ref(TABLE_LIST *view_arg, Item **item, - const char *field_name_arg) - :Item_direct_ref(view_arg, item, field_name_arg), item_equal(0) - {} + item_equal(0), view(view_arg), + null_ref_table(NULL) {} bool fix_fields(THD *, Item **); bool eq(const Item *item, bool binary_cmp) const; @@ -2969,6 +2978,84 @@ public: view_arg->view_used_tables|= (*ref)->used_tables(); return 0; } + void save_val(Field *to) + { + if (check_null_ref()) + to->set_null(); + else + Item_direct_ref::save_val(to); + } + double val_real() + { + if (check_null_ref()) + return 0; + else + return Item_direct_ref::val_real(); + } + longlong val_int() + { + if (check_null_ref()) + return 0; + else + return Item_direct_ref::val_int(); + } + String *val_str(String* tmp) + { + if (check_null_ref()) + return NULL; + else + return Item_direct_ref::val_str(tmp); + } + my_decimal *val_decimal(my_decimal *tmp) + { + if (check_null_ref()) + return NULL; + else + return Item_direct_ref::val_decimal(tmp); + } + bool val_bool() + { + if (check_null_ref()) + return 0; + else + return Item_direct_ref::val_bool(); + } + bool is_null() + { + if (check_null_ref()) + return 1; + else + return Item_direct_ref::is_null(); + } + bool get_date(MYSQL_TIME *ltime, uint fuzzydate) + { + if (check_null_ref()) + { + bzero((char*) ltime,sizeof(*ltime)); + return 1; + } + return Item_direct_ref::get_date(ltime, fuzzydate); + } + bool send(Protocol *protocol, String *buffer) + { + if (check_null_ref()) + return protocol->store_null(); + return Item_direct_ref::send(protocol, buffer); + } + void save_org_in_field(Field *field) + { + if (check_null_ref()) + field->set_null(); + else + Item_direct_ref::save_val(field); + } + void save_in_result_field(bool no_conversions) + { + if (check_null_ref()) + result_field->set_null(); + else + Item_direct_ref::save_in_result_field(no_conversions); + } }; diff --git a/sql/table.cc b/sql/table.cc index 2eb7eca6fb0..2be94c55205 100644 --- a/sql/table.cc +++ b/sql/table.cc @@ -4441,6 +4441,28 @@ void TABLE_LIST::set_check_materialized() } } +TABLE *TABLE_LIST::get_real_join_table() +{ + TABLE_LIST *tbl= this; + while (tbl->table == NULL || tbl->table->reginfo.join_tab == NULL) + { + if (tbl->view == NULL && tbl->derived == NULL) + break; + /* we do not support merging of union yet */ + DBUG_ASSERT(tbl->view == NULL || + tbl->view->select_lex.next_select() == NULL); + DBUG_ASSERT(tbl->derived == NULL || + tbl->derived->first_select()->next_select() == NULL); + + if (tbl->table) + table= tbl->table; + tbl= (tbl->view != NULL ? + tbl->view->select_lex.get_table_list() : + tbl->derived->first_select()->get_table_list()); + } + return tbl->table; +} + Natural_join_column::Natural_join_column(Field_translator *field_param, TABLE_LIST *tab) diff --git a/sql/table.h b/sql/table.h index 6ce6c83c604..8ce73162aaf 100644 --- a/sql/table.h +++ b/sql/table.h @@ -1671,6 +1671,7 @@ struct TABLE_LIST TABLE_LIST *find_underlying_table(TABLE *table); TABLE_LIST *first_leaf_for_name_resolution(); TABLE_LIST *last_leaf_for_name_resolution(); + TABLE *get_real_join_table(); bool is_leaf_for_name_resolution(); inline TABLE_LIST *top_table() { return belong_to_view ? belong_to_view : this; } From a0efc4bd7779e3fe9ef664a2254e8f9c5868afeb Mon Sep 17 00:00:00 2001 From: Sergei Golubchik Date: Thu, 6 Sep 2012 10:08:09 +0200 Subject: [PATCH 158/164] MDEV-510 assert triggered by ./mtr --ps-protocol rpl_mdev382 The DELETE for emplicitly emptied MEMORY tables should be written directly to binlog. --- mysql-test/suite/rpl/r/rpl_mdev382.result | 4 +-- sql/sql_base.cc | 38 ++++++++--------------- 2 files changed, 14 insertions(+), 28 deletions(-) diff --git a/mysql-test/suite/rpl/r/rpl_mdev382.result b/mysql-test/suite/rpl/r/rpl_mdev382.result index b564dd8401e..bbc57006d0d 100644 --- a/mysql-test/suite/rpl/r/rpl_mdev382.result +++ b/mysql-test/suite/rpl/r/rpl_mdev382.result @@ -321,9 +321,7 @@ a` # The DELETE statement should be correctly quoted show binlog events in 'master-bin.000002' from ; Log_name Pos Event_type Server_id End_log_pos Info -master-bin.000002 # Query # # BEGIN -master-bin.000002 # Query # # use `test`; DELETE FROM `db1``; select 'oops!'`.`t``1` -master-bin.000002 # Query # # COMMIT +master-bin.000002 # Query # # DELETE FROM `db1``; select 'oops!'`.`t``1` include/start_slave.inc # The table should be empty on the slave also. SELECT * FROM `db1``; select 'oops!'`.`t``1`; diff --git a/sql/sql_base.cc b/sql/sql_base.cc index 52569f193aa..a1e00b74a47 100644 --- a/sql/sql_base.cc +++ b/sql/sql_base.cc @@ -3893,34 +3893,22 @@ static bool open_table_entry_fini(THD *thd, TABLE_SHARE *share, TABLE *entry) { char query_buf[2*FN_REFLEN + 21]; String query(query_buf, sizeof(query_buf), system_charset_info); + query.length(0); - if (query.ptr()) - { - /* this DELETE FROM is needed even with row-based binlogging */ - query.append("DELETE FROM "); - append_identifier(thd, &query, share->db.str, share->db.length); - query.append("."); - append_identifier(thd, &query, share->table_name.str, + query.append("DELETE FROM "); + append_identifier(thd, &query, share->db.str, share->db.length); + query.append("."); + append_identifier(thd, &query, share->table_name.str, share->table_name.length); - int errcode= query_error_code(thd, TRUE); - if (thd->binlog_query(THD::STMT_QUERY_TYPE, - query.ptr(), query.length(), - FALSE, FALSE, FALSE, errcode)) - return TRUE; - } - else - { - /* - As replication is maybe going to be corrupted, we need to warn the - DBA on top of warning the client (which will automatically be done - because of MYF(MY_WME) in my_malloc() above). - */ - sql_print_error("When opening HEAP table, could not allocate memory " - "to write 'DELETE FROM %`s.%`s' to the binary log", - share->db.str, share->table_name.str); - delete entry->triggers; + + /* + we bypass thd->binlog_query() here, + as it does a lot of extra work, that is simply wrong in this case + */ + Query_log_event qinfo(thd, query.ptr(), query.length(), + FALSE, TRUE, TRUE, 0); + if (mysql_bin_log.write(&qinfo)) return TRUE; - } } } return FALSE; From 22de18ddcb97640f8f90c1c88d1dcd795ba1070f Mon Sep 17 00:00:00 2001 From: unknown Date: Fri, 7 Sep 2012 09:17:31 +0300 Subject: [PATCH 159/164] Fix of MDEV-511. As far as we reopen tables so TABLE become invalid we should remove the pointer on cleanup(). --- sql/item.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/sql/item.h b/sql/item.h index 9bcb913d5c5..3136bb00394 100644 --- a/sql/item.h +++ b/sql/item.h @@ -3287,6 +3287,12 @@ public: else Item_direct_ref::save_in_result_field(no_conversions); } + + void cleanup() + { + null_ref_table= NULL; + Item_direct_ref::cleanup(); + } }; From 2fc4c75194c1c6cc432d847ed47ef73298ff4c7f Mon Sep 17 00:00:00 2001 From: Michael Widenius Date: Fri, 7 Sep 2012 17:05:17 +0300 Subject: [PATCH 160/164] Better error message when using --language or --log-bin Simplify code sql/derror.cc: Better error message sql/mysqld.cc: Simplify usage of lc_messages_dir_ptr. Don't give warnings that --log-bin should be used if --log-bin or --skip-log-bin is used. --- sql/derror.cc | 4 ++-- sql/mysqld.cc | 24 ++++++++++++------------ 2 files changed, 14 insertions(+), 14 deletions(-) diff --git a/sql/derror.cc b/sql/derror.cc index baf7163790d..33835992258 100644 --- a/sql/derror.cc +++ b/sql/derror.cc @@ -177,8 +177,8 @@ bool read_texts(const char *file_name, const char *language, O_RDONLY | O_SHARE | O_BINARY, MYF(0))) < 0) goto err; - sql_print_error("An old style --language value with language specific part detected: %s", lc_messages_dir); - sql_print_error("Use --lc-messages-dir without language specific part instead."); + sql_print_warning("An old style --language or -lc-message-dir value with language specific part detected: %s", lc_messages_dir); + sql_print_warning("Use --lc-messages-dir without language specific part instead."); } funktpos=1; diff --git a/sql/mysqld.cc b/sql/mysqld.cc index 47be8551359..c2a07e11f0e 100644 --- a/sql/mysqld.cc +++ b/sql/mysqld.cc @@ -360,7 +360,7 @@ static DYNAMIC_ARRAY all_options; /* Global variables */ -bool opt_bin_log, opt_ignore_builtin_innodb= 0; +bool opt_bin_log, opt_bin_log_used=0, opt_ignore_builtin_innodb= 0; my_bool opt_log, opt_slow_log, debug_assert_if_crashed_table= 0, opt_help= 0, opt_abort; ulonglong log_output_options; my_bool opt_userstat_running; @@ -579,7 +579,7 @@ char mysql_real_data_home[FN_REFLEN], lc_messages_dir[FN_REFLEN], reg_ext[FN_EXTLEN], mysql_charsets_dir[FN_REFLEN], *opt_init_file, *opt_tc_log_file; -char *lc_messages_dir_ptr, *log_error_file_ptr; +char *lc_messages_dir_ptr= lc_messages_dir, *log_error_file_ptr; char mysql_unpacked_real_data_home[FN_REFLEN]; int mysql_unpacked_real_data_home_len; uint mysql_real_data_home_len, mysql_data_home_len= 1; @@ -4172,14 +4172,15 @@ static int init_server_components() unireg_abort(1); /* need to configure logging before initializing storage engines */ - if (opt_log_slave_updates && !opt_bin_log) + if (!opt_bin_log_used) { - sql_print_warning("You need to use --log-bin to make " - "--log-slave-updates work."); + if (opt_log_slave_updates) + sql_print_warning("You need to use --log-bin to make " + "--log-slave-updates work."); + if (binlog_format_used) + sql_print_warning("You need to use --log-bin to make " + "--binlog-format work."); } - if (!opt_bin_log && binlog_format_used) - sql_print_warning("You need to use --log-bin to make " - "--binlog-format work."); /* Check that we have not let the format to unspecified at this point */ DBUG_ASSERT((uint)global_system_variables.binlog_format <= @@ -6226,7 +6227,7 @@ struct my_option my_long_options[]= {"language", 'L', "Client error messages in given language. May be given as a full path. " "Deprecated. Use --lc-messages-dir instead.", - &lc_messages_dir_ptr, &lc_messages_dir_ptr, 0, + 0, 0, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0}, {"lc-messages", 0, "Set the language used for the error messages.", @@ -7218,7 +7219,7 @@ static int mysql_init_variables(void) myisam_test_invalid_symlink= test_if_data_home_dir; #endif opt_log= opt_slow_log= 0; - opt_bin_log= 0; + opt_bin_log= opt_bin_log_used= 0; opt_disable_networking= opt_skip_show_db=0; opt_skip_name_resolve= 0; opt_ignore_builtin_innodb= 0; @@ -7270,7 +7271,6 @@ static int mysql_init_variables(void) mysql_home_ptr= mysql_home; pidfile_name_ptr= pidfile_name; log_error_file_ptr= log_error_file; - lc_messages_dir_ptr= lc_messages_dir; protocol_version= PROTOCOL_VERSION; what_to_log= ~ (1L << (uint) COM_TIME); refresh_version= 1L; /* Increments on each reload */ @@ -7459,7 +7459,6 @@ mysqld_get_one_option(int optid, break; case 'L': strmake(lc_messages_dir, argument, sizeof(lc_messages_dir)-1); - lc_messages_dir_ptr= lc_messages_dir; break; case OPT_BINLOG_FORMAT: binlog_format_used= true; @@ -7488,6 +7487,7 @@ mysqld_get_one_option(int optid, break; case (int) OPT_BIN_LOG: opt_bin_log= test(argument != disabled_my_option); + opt_bin_log_used= 1; break; case (int) OPT_LOG_BASENAME: { From 3a793b9d4d53867263eefd60010af2a124f485d1 Mon Sep 17 00:00:00 2001 From: Michael Widenius Date: Sun, 9 Sep 2012 01:22:06 +0300 Subject: [PATCH 161/164] Added new status variables: feature_dynamic_columns,feature_fulltext,feature_gis,feature_locale,feature_subquery,feature_timezone,feature_trigger,feature_xml Opened_views, Executed_triggers, Executed_events Added new process status 'updating status' as part of 'freeing items' mysql-test/r/features.result: Test of feature_xxx status variables mysql-test/r/mysqld--help.result: Removed duplicated 'language' variable. mysql-test/r/view.result: Test of opened_views mysql-test/suite/rpl/t/rpl_start_stop_slave.test: Write more information on failure mysql-test/t/features.test: Test of feature_xxx status variables mysql-test/t/view.test: Test of opened_views sql/event_scheduler.cc: Increment executed_events status variable sql/field.cc: Increment status variable sql/item_func.cc: Increment status variable sql/item_strfunc.cc: Increment status variable sql/item_subselect.cc: Increment status variable sql/item_xmlfunc.cc: Increment status variable sql/mysqld.cc: Add new status variables to 'show status' sql/mysqld.h: Added executed_events sql/sql_base.cc: Increment status variable sql/sql_class.h: Add new status variables sql/sql_parse.cc: Added new process status 'updating status' as part of 'freeing items' sql/sql_trigger.cc: Increment status variable sql/sys_vars.cc: Increment status variable sql/tztime.cc: Increment status variable --- mysql-test/r/features.result | 140 ++++++++++++++++++ mysql-test/r/mysqld--help.result | 1 - mysql-test/r/view.result | 10 ++ .../suite/rpl/t/rpl_start_stop_slave.test | 10 ++ mysql-test/t/features.test | 107 +++++++++++++ mysql-test/t/view.test | 4 + sql/event_scheduler.cc | 5 +- sql/field.cc | 3 + sql/item_func.cc | 2 + sql/item_strfunc.cc | 1 + sql/item_subselect.cc | 2 + sql/item_xmlfunc.cc | 2 + sql/mysqld.cc | 13 ++ sql/mysqld.h | 1 + sql/sql_base.cc | 1 + sql/sql_class.h | 24 +-- sql/sql_parse.cc | 1 + sql/sql_trigger.cc | 3 + sql/sys_vars.cc | 15 +- sql/tztime.cc | 4 +- 20 files changed, 328 insertions(+), 21 deletions(-) create mode 100644 mysql-test/r/features.result create mode 100644 mysql-test/t/features.test diff --git a/mysql-test/r/features.result b/mysql-test/r/features.result new file mode 100644 index 00000000000..7b6a352ab0c --- /dev/null +++ b/mysql-test/r/features.result @@ -0,0 +1,140 @@ +drop table if exists t1; +show status like "feature%"; +Variable_name Value +Feature_dynamic_columns 0 +Feature_fulltext 0 +Feature_gis 0 +Feature_locale 0 +Feature_subquery 0 +Feature_timezone 0 +Feature_trigger 0 +Feature_xml 0 +# +# Feature GIS +# +CREATE TABLE t1 (g POINT); +SHOW FIELDS FROM t1; +Field Type Null Key Default Extra +g point YES NULL +INSERT INTO t1 VALUES +(PointFromText('POINT(10 10)')), +(PointFromText('POINT(20 10)')), +(PointFromText('POINT(20 20)')), +(PointFromWKB(AsWKB(PointFromText('POINT(10 20)')))); +drop table t1; +show status like "feature_gis"; +Variable_name Value +Feature_gis 3 +# +# Feature dynamic columns +# +set @a= COLUMN_CREATE(1, 1212 AS int); +set @b= column_add(@a, 2, 1212 as integer); +select column_get(@b, 2 as integer); +column_get(@b, 2 as integer) +1212 +show status like "feature_dynamic_columns"; +Variable_name Value +Feature_dynamic_columns 2 +# +# Feature fulltext +# +CREATE TABLE t1 (a VARCHAR(200), b TEXT, FULLTEXT (a,b)) engine=myisam; +INSERT INTO t1 VALUES('MySQL has now support', 'for full-text search'), +('Full-text indexes', 'are called collections'), +('Only MyISAM tables','support collections'), +('Function MATCH ... AGAINST()','is used to do a search'), +('Full-text search in MySQL', 'implements vector space model'); +select * from t1 where MATCH(a,b) AGAINST ("collections"); +a b +Only MyISAM tables support collections +Full-text indexes are called collections +select * from t1 where MATCH(a,b) AGAINST ("indexes"); +a b +Full-text indexes are called collections +drop table t1; +show status like "feature_fulltext"; +Variable_name Value +Feature_fulltext 2 +# +# Feature locale +# +SET lc_messages=sr_RS; +SET lc_messages=en_US; +show status like "feature_locale"; +Variable_name Value +Feature_locale 2 +# +# Feature subquery +# +select (select 2); +(select 2) +2 +SELECT (SELECT 1) UNION SELECT (SELECT 2); +(SELECT 1) +1 +2 +create table t1 (a int); +insert into t1 values (2); +select (select a from t1 where t1.a=t2.a), a from t1 as t2; +(select a from t1 where t1.a=t2.a) a +2 2 +drop table t1; +show status like "feature_subquery"; +Variable_name Value +Feature_subquery 4 +# +# Feature timezone +# +SELECT FROM_UNIXTIME(unix_timestamp()) > "1970-01-01"; +FROM_UNIXTIME(unix_timestamp()) > "1970-01-01" +1 +set time_zone="+03:00"; +SELECT FROM_UNIXTIME(unix_timestamp()) > "1970-01-01"; +FROM_UNIXTIME(unix_timestamp()) > "1970-01-01" +1 +set time_zone= @@global.time_zone; +show status like "feature_timezone"; +Variable_name Value +Feature_timezone 1 +# +# Feature triggers +# +create table t1 (i int); +# let us test some very simple trigger +create trigger trg before insert on t1 for each row set @a:=1; +set @a:=0; +select @a; +@a +0 +insert into t1 values (1),(2); +select @a; +@a +1 +SHOW TRIGGERS IN test like 't1'; +Trigger Event Table Statement Timing Created sql_mode Definer character_set_client collation_connection Database Collation +trg INSERT t1 set @a:=1 BEFORE NULL root@localhost latin1 latin1_swedish_ci latin1_swedish_ci +drop trigger trg; +drop table t1; +show status like "%trigger%"; +Variable_name Value +Com_create_trigger 1 +Com_drop_trigger 1 +Com_show_create_trigger 0 +Com_show_triggers 1 +Executed_triggers 2 +Feature_trigger 2 +# +# Feature xml +# +SET @xml='a1b1c1b2a2'; +SELECT extractValue(@xml,'/a'); +extractValue(@xml,'/a') +a1 a2 +select updatexml('
12
', +'/','12') as upd1; +upd1 +12 +show status like "feature_xml"; +Variable_name Value +Feature_xml 2 diff --git a/mysql-test/r/mysqld--help.result b/mysql-test/r/mysqld--help.result index 63df79160cc..718909d1b27 100644 --- a/mysql-test/r/mysqld--help.result +++ b/mysql-test/r/mysqld--help.result @@ -923,7 +923,6 @@ key-cache-age-threshold 300 key-cache-block-size 1024 key-cache-division-limit 100 key-cache-segments 0 -language MYSQL_SHAREDIR/ large-pages FALSE lc-messages en_US lc-messages-dir MYSQL_SHAREDIR/ diff --git a/mysql-test/r/view.result b/mysql-test/r/view.result index 1b35fe5a56a..5af20fd0c3c 100644 --- a/mysql-test/r/view.result +++ b/mysql-test/r/view.result @@ -4678,6 +4678,7 @@ DROP TABLE t1,t2,t3; # LP bug#1007622 Server crashes in handler::increment_statistics on # inserting into a view over a view # +flush status; CREATE TABLE t1 (a INT); CREATE ALGORITHM=MERGE VIEW v1 AS SELECT a1.* FROM t1 AS a1, t1 AS a2; CREATE ALGORITHM=MERGE VIEW v2 AS SELECT * FROM v1; @@ -4687,6 +4688,15 @@ a 1 drop view v2,v1; drop table t1; +show status like '%view%'; +Variable_name Value +Com_create_view 2 +Com_drop_view 1 +Opened_views 3 +show status like 'Opened_table%'; +Variable_name Value +Opened_table_definitions 2 +Opened_tables 3 # # MDEV-486 LP BUG#1010116 Incorrect query results in # view and derived tables diff --git a/mysql-test/suite/rpl/t/rpl_start_stop_slave.test b/mysql-test/suite/rpl/t/rpl_start_stop_slave.test index c9c8f043668..ab388f3eebc 100644 --- a/mysql-test/suite/rpl/t/rpl_start_stop_slave.test +++ b/mysql-test/suite/rpl/t/rpl_start_stop_slave.test @@ -21,6 +21,16 @@ connection slave; --let $connection_id=`SELECT id FROM information_schema.processlist where state LIKE 'Waiting for master to send event'` +if(!$connection_id) +{ + # Something went wrong (timing) + # Show process list so that we can debug. In this case we will abort with + # wrong result + -- echo "Could not find connect id. Dumping process list for debugging" + SELECT * FROM information_schema.processlist; + exit; +} + set @time_before_kill := (select CURRENT_TIMESTAMP); --echo [Time before the query] diff --git a/mysql-test/t/features.test b/mysql-test/t/features.test new file mode 100644 index 00000000000..a54b09a3fd3 --- /dev/null +++ b/mysql-test/t/features.test @@ -0,0 +1,107 @@ +# Testing of feature statistics + +-- source include/have_geometry.inc + +--disable_warnings +drop table if exists t1; +--enable_warnings + +show status like "feature%"; + +--echo # +--echo # Feature GIS +--echo # + +CREATE TABLE t1 (g POINT); +SHOW FIELDS FROM t1; +INSERT INTO t1 VALUES + (PointFromText('POINT(10 10)')), + (PointFromText('POINT(20 10)')), + (PointFromText('POINT(20 20)')), + (PointFromWKB(AsWKB(PointFromText('POINT(10 20)')))); +drop table t1; + +show status like "feature_gis"; + +--echo # +--echo # Feature dynamic columns +--echo # +set @a= COLUMN_CREATE(1, 1212 AS int); +set @b= column_add(@a, 2, 1212 as integer); +select column_get(@b, 2 as integer); + +show status like "feature_dynamic_columns"; + +--echo # +--echo # Feature fulltext +--echo # + +CREATE TABLE t1 (a VARCHAR(200), b TEXT, FULLTEXT (a,b)) engine=myisam; +INSERT INTO t1 VALUES('MySQL has now support', 'for full-text search'), + ('Full-text indexes', 'are called collections'), + ('Only MyISAM tables','support collections'), + ('Function MATCH ... AGAINST()','is used to do a search'), + ('Full-text search in MySQL', 'implements vector space model'); +select * from t1 where MATCH(a,b) AGAINST ("collections"); +select * from t1 where MATCH(a,b) AGAINST ("indexes"); +drop table t1; + +show status like "feature_fulltext"; + + +--echo # +--echo # Feature locale +--echo # + +SET lc_messages=sr_RS; +SET lc_messages=en_US; +show status like "feature_locale"; + +--echo # +--echo # Feature subquery +--echo # + +select (select 2); +SELECT (SELECT 1) UNION SELECT (SELECT 2); + +create table t1 (a int); +insert into t1 values (2); +select (select a from t1 where t1.a=t2.a), a from t1 as t2; +drop table t1; +show status like "feature_subquery"; + +--echo # +--echo # Feature timezone +--echo # + +SELECT FROM_UNIXTIME(unix_timestamp()) > "1970-01-01"; +set time_zone="+03:00"; +SELECT FROM_UNIXTIME(unix_timestamp()) > "1970-01-01"; +set time_zone= @@global.time_zone; +show status like "feature_timezone"; + +--echo # +--echo # Feature triggers +--echo # + +create table t1 (i int); +--echo # let us test some very simple trigger +create trigger trg before insert on t1 for each row set @a:=1; +set @a:=0; +select @a; +insert into t1 values (1),(2); +select @a; +SHOW TRIGGERS IN test like 't1'; +drop trigger trg; +drop table t1; + +show status like "%trigger%"; + +--echo # +--echo # Feature xml +--echo # +SET @xml='a1b1c1b2a2'; +SELECT extractValue(@xml,'/a'); +select updatexml('
12
', + '/','12') as upd1; +show status like "feature_xml"; diff --git a/mysql-test/t/view.test b/mysql-test/t/view.test index efb6956ae8f..4f739b524e6 100644 --- a/mysql-test/t/view.test +++ b/mysql-test/t/view.test @@ -4618,6 +4618,8 @@ DROP TABLE t1,t2,t3; --echo # inserting into a view over a view --echo # +flush status; + CREATE TABLE t1 (a INT); CREATE ALGORITHM=MERGE VIEW v1 AS SELECT a1.* FROM t1 AS a1, t1 AS a2; CREATE ALGORITHM=MERGE VIEW v2 AS SELECT * FROM v1; @@ -4625,6 +4627,8 @@ INSERT INTO v2 (a) VALUES (1) ; select * from t1; drop view v2,v1; drop table t1; +show status like '%view%'; +show status like 'Opened_table%'; --echo # --echo # MDEV-486 LP BUG#1010116 Incorrect query results in diff --git a/sql/event_scheduler.cc b/sql/event_scheduler.cc index 55a3f6b36c4..b41c9e2cda0 100644 --- a/sql/event_scheduler.cc +++ b/sql/event_scheduler.cc @@ -42,7 +42,7 @@ cond_wait(mythd, abstime, msg, SCHED_FUNC, __LINE__) extern pthread_attr_t connection_attrib; - +extern ulong event_executed; Event_db_repository *Event_worker_thread::db_repository; @@ -557,7 +557,8 @@ Event_scheduler::execute_top(Event_queue_element_for_exec *event_name) event_name))) goto error; - ++started_events; + started_events++; + executed_events++; // For SHOW STATUS DBUG_PRINT("info", ("Event is in THD: 0x%lx", (long) new_thd)); DBUG_RETURN(FALSE); diff --git a/sql/field.cc b/sql/field.cc index 1004f58c945..a3d3d951887 100644 --- a/sql/field.cc +++ b/sql/field.cc @@ -9395,9 +9395,12 @@ Field *make_field(TABLE_SHARE *share, uchar *ptr, uint32 field_length, #ifdef HAVE_SPATIAL if (f_is_geom(pack_flag)) + { + status_var_increment(current_thd->status_var.feature_gis); return new Field_geom(ptr,null_pos,null_bit, unireg_check, field_name, share, pack_length, geom_type); + } #endif if (f_is_blob(pack_flag)) return new Field_blob(ptr,null_pos,null_bit, diff --git a/sql/item_func.cc b/sql/item_func.cc index 1e891f06f0b..441eb37d701 100644 --- a/sql/item_func.cc +++ b/sql/item_func.cc @@ -6046,6 +6046,8 @@ bool Item_func_match::fix_fields(THD *thd, Item **ref) DBUG_ASSERT(fixed == 0); Item *UNINIT_VAR(item); // Safe as arg_count is > 1 + status_var_increment(thd->status_var.feature_fulltext); + maybe_null=1; join_key=0; diff --git a/sql/item_strfunc.cc b/sql/item_strfunc.cc index c5d1edbe475..ebfca684ccb 100644 --- a/sql/item_strfunc.cc +++ b/sql/item_strfunc.cc @@ -3774,6 +3774,7 @@ bool Item_func_dyncol_create::fix_fields(THD *thd, Item **ref) (arg_count / 2)); nums= (uint *) alloc_root(thd->mem_root, sizeof(uint) * (arg_count / 2)); + status_var_increment(thd->status_var.feature_dynamic_columns); return res || vals == 0 || nums == 0; } diff --git a/sql/item_subselect.cc b/sql/item_subselect.cc index 8bb4e7af00f..091eb178d68 100644 --- a/sql/item_subselect.cc +++ b/sql/item_subselect.cc @@ -220,6 +220,8 @@ bool Item_subselect::fix_fields(THD *thd_param, Item **ref) uint8 uncacheable; bool res; + status_var_increment(thd->status_var.feature_subquery); + DBUG_ASSERT(fixed == 0); engine->set_thd((thd= thd_param)); if (!done_first_fix_fields) diff --git a/sql/item_xmlfunc.cc b/sql/item_xmlfunc.cc index 0fa2d39aea9..ae0a74c5ba6 100644 --- a/sql/item_xmlfunc.cc +++ b/sql/item_xmlfunc.cc @@ -2601,6 +2601,8 @@ void Item_xml_str_func::fix_length_and_dec() MY_XPATH xpath; int rc; + status_var_increment(current_thd->status_var.feature_xml); + nodeset_func= 0; if (agg_arg_charsets_for_comparison(collation, args, arg_count)) diff --git a/sql/mysqld.cc b/sql/mysqld.cc index c2a07e11f0e..e56b5123a7c 100644 --- a/sql/mysqld.cc +++ b/sql/mysqld.cc @@ -482,6 +482,7 @@ ulonglong binlog_stmt_cache_size=0; ulonglong max_binlog_stmt_cache_size=0; ulonglong query_cache_size=0; ulong refresh_version; /* Increments on each reload */ +ulong executed_events=0; query_id_t global_query_id; my_atomic_rwlock_t global_query_id_lock; my_atomic_rwlock_t thread_running_lock; @@ -6948,6 +6949,16 @@ SHOW_VAR status_vars[]= { {"Delayed_insert_threads", (char*) &delayed_insert_threads, SHOW_LONG_NOFLUSH}, {"Delayed_writes", (char*) &delayed_insert_writes, SHOW_LONG}, {"Empty_queries", (char*) offsetof(STATUS_VAR, empty_queries), SHOW_LONG_STATUS}, + {"Executed_events", (char*) &executed_events, SHOW_LONG_NOFLUSH }, + {"Executed_triggers", (char*) offsetof(STATUS_VAR, executed_triggers), SHOW_LONG_STATUS}, + {"Feature_dynamic_columns", (char*) offsetof(STATUS_VAR, feature_dynamic_columns), SHOW_LONG_STATUS}, + {"Feature_fulltext", (char*) offsetof(STATUS_VAR, feature_fulltext), SHOW_LONG_STATUS}, + {"Feature_gis", (char*) offsetof(STATUS_VAR, feature_gis), SHOW_LONG_STATUS}, + {"Feature_locale", (char*) offsetof(STATUS_VAR, feature_locale), SHOW_LONG_STATUS}, + {"Feature_subquery", (char*) offsetof(STATUS_VAR, feature_subquery), SHOW_LONG_STATUS}, + {"Feature_timezone", (char*) offsetof(STATUS_VAR, feature_timezone), SHOW_LONG_STATUS}, + {"Feature_trigger", (char*) offsetof(STATUS_VAR, feature_trigger), SHOW_LONG_STATUS}, + {"Feature_xml", (char*) offsetof(STATUS_VAR, feature_xml), SHOW_LONG_STATUS}, {"Flush_commands", (char*) &refresh_version, SHOW_LONG_NOFLUSH}, {"Handler_commit", (char*) offsetof(STATUS_VAR, ha_commit_count), SHOW_LONG_STATUS}, {"Handler_delete", (char*) offsetof(STATUS_VAR, ha_delete_count), SHOW_LONG_STATUS}, @@ -6987,6 +6998,7 @@ SHOW_VAR status_vars[]= { {"Opened_files", (char*) &my_file_total_opened, SHOW_LONG_NOFLUSH}, {"Opened_tables", (char*) offsetof(STATUS_VAR, opened_tables), SHOW_LONG_STATUS}, {"Opened_table_definitions", (char*) offsetof(STATUS_VAR, opened_shares), SHOW_LONG_STATUS}, + {"Opened_views", (char*) offsetof(STATUS_VAR, opened_views), SHOW_LONG_STATUS}, {"Prepared_stmt_count", (char*) &show_prepared_stmt_count, SHOW_FUNC}, {"Rows_sent", (char*) offsetof(STATUS_VAR, rows_sent), SHOW_LONGLONG_STATUS}, {"Rows_read", (char*) offsetof(STATUS_VAR, rows_read), SHOW_LONGLONG_STATUS}, @@ -7274,6 +7286,7 @@ static int mysql_init_variables(void) protocol_version= PROTOCOL_VERSION; what_to_log= ~ (1L << (uint) COM_TIME); refresh_version= 1L; /* Increments on each reload */ + executed_events= 0; global_query_id= thread_id= 1L; my_atomic_rwlock_init(&global_query_id_lock); my_atomic_rwlock_init(&thread_running_lock); diff --git a/sql/mysqld.h b/sql/mysqld.h index 56419acdcd4..619f30ce683 100644 --- a/sql/mysqld.h +++ b/sql/mysqld.h @@ -175,6 +175,7 @@ extern ulong opt_binlog_rows_event_max_size; extern ulong rpl_recovery_rank, thread_cache_size; extern ulong stored_program_cache_size; extern ulong back_log; +extern ulong executed_events; extern char language[FN_REFLEN]; extern "C" MYSQL_PLUGIN_IMPORT ulong server_id; extern ulong concurrency; diff --git a/sql/sql_base.cc b/sql/sql_base.cc index a1e00b74a47..85e9227c154 100644 --- a/sql/sql_base.cc +++ b/sql/sql_base.cc @@ -9421,6 +9421,7 @@ open_new_frm(THD *thd, TABLE_SHARE *share, const char *alias, if (mysql_make_view(thd, parser, table_desc, (prgflag & OPEN_VIEW_NO_PARSE))) goto err; + status_var_increment(thd->status_var.opened_views); } else { diff --git a/sql/sql_class.h b/sql/sql_class.h index 845c2115922..344d6435ad5 100644 --- a/sql/sql_class.h +++ b/sql/sql_class.h @@ -620,25 +620,17 @@ typedef struct system_status_var ulong ha_savepoint_count; ulong ha_savepoint_rollback_count; -#if 0 - /* KEY_CACHE parts. These are copies of the original */ - ulong key_blocks_changed; - ulong key_blocks_used; - ulong key_cache_r_requests; - ulong key_cache_read; - ulong key_cache_w_requests; - ulong key_cache_write; - /* END OF KEY_CACHE parts */ -#endif - ulong net_big_packet_count; ulong opened_tables; ulong opened_shares; + ulong opened_views; /* +1 opening a view */ + ulong select_full_join_count; ulong select_full_range_join_count; ulong select_range_count; ulong select_range_check_count; ulong select_scan_count; + ulong executed_triggers; ulong long_query_count; ulong filesort_merge_passes; ulong filesort_range_count; @@ -653,6 +645,16 @@ typedef struct system_status_var ulong com_stmt_reset; ulong com_stmt_close; + /* Features used */ + ulong feature_dynamic_columns; /* +1 when creating a dynamic column */ + ulong feature_fulltext; /* +1 when MATCH is used */ + ulong feature_gis; /* +1 opening a table with GIS features */ + ulong feature_locale; /* +1 when LOCALE is set */ + ulong feature_subquery; /* +1 when subqueries are used */ + ulong feature_timezone; /* +1 when XPATH is used */ + ulong feature_trigger; /* +1 opening a table with triggers */ + ulong feature_xml; /* +1 when XPATH is used */ + ulong empty_queries; ulong access_denied_errors; ulong lost_connections; diff --git a/sql/sql_parse.cc b/sql/sql_parse.cc index 6f157c89ee2..dd14173e47f 100644 --- a/sql/sql_parse.cc +++ b/sql/sql_parse.cc @@ -1425,6 +1425,7 @@ bool dispatch_command(enum enum_server_command command, THD *thd, (thd->open_tables == NULL || (thd->locked_tables_mode == LTM_LOCK_TABLES))); + thd_proc_info(thd, "updating status"); /* Finalize server status flags after executing a command. */ thd->update_server_status(); thd->protocol->end_statement(); diff --git a/sql/sql_trigger.cc b/sql/sql_trigger.cc index 1b942ecc93b..aff00f9fcf4 100644 --- a/sql/sql_trigger.cc +++ b/sql/sql_trigger.cc @@ -1334,6 +1334,7 @@ bool Table_triggers_list::check_n_load(THD *thd, const char *db, triggers->definitions_list.elements); table->triggers= triggers; + status_var_increment(thd->status_var.feature_trigger); /* TODO: This could be avoided if there is no triggers @@ -2116,6 +2117,8 @@ bool Table_triggers_list::process_triggers(THD *thd, if (sp_trigger == NULL) return FALSE; + status_var_increment(thd->status_var.executed_triggers); + if (old_row_is_record1) { old_field= record1_field; diff --git a/sql/sys_vars.cc b/sql/sys_vars.cc index 2fdba7fda82..6de285086a2 100644 --- a/sql/sys_vars.cc +++ b/sql/sys_vars.cc @@ -3578,22 +3578,25 @@ static bool check_locale(sys_var *self, THD *thd, set_var *var) if (!locale->errmsgs->errmsgs) { + bool res; mysql_mutex_lock(&LOCK_error_messages); - if (!locale->errmsgs->errmsgs && - read_texts(ERRMSG_FILE, locale->errmsgs->language, - &locale->errmsgs->errmsgs, - ER_ERROR_LAST - ER_ERROR_FIRST + 1)) + res= (!locale->errmsgs->errmsgs && + read_texts(ERRMSG_FILE, locale->errmsgs->language, + &locale->errmsgs->errmsgs, + ER_ERROR_LAST - ER_ERROR_FIRST + 1)); + mysql_mutex_unlock(&LOCK_error_messages); + if (res) { push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_UNKNOWN_ERROR, "Can't process error message file for locale '%s'", locale->name); - mysql_mutex_unlock(&LOCK_error_messages); return true; } - mysql_mutex_unlock(&LOCK_error_messages); } + status_var_increment(thd->status_var.feature_locale); return false; } + static Sys_var_struct Sys_lc_messages( "lc_messages", "Set the language used for the error messages", SESSION_VAR(lc_messages), NO_CMD_LINE, diff --git a/sql/tztime.cc b/sql/tztime.cc index 9fae9f3fedd..ba24cab9ca7 100644 --- a/sql/tztime.cc +++ b/sql/tztime.cc @@ -2329,7 +2329,6 @@ my_tz_find(THD *thd, const String *name) if (!str_to_offset(name->ptr(), name->length(), &offset)) { - if (!(result_tz= (Time_zone_offset *)my_hash_search(&offset_tzs, (const uchar *)&offset, sizeof(long)))) @@ -2371,6 +2370,9 @@ my_tz_find(THD *thd, const String *name) mysql_mutex_unlock(&tz_LOCK); + if (result_tz && result_tz != my_tz_SYSTEM && result_tz != my_tz_UTC) + status_var_increment(thd->status_var.feature_timezone); + DBUG_RETURN(result_tz); } From 7fbd2de8b8bba2ed27bebbdba99ed4f345b83fa5 Mon Sep 17 00:00:00 2001 From: Michael Widenius Date: Mon, 10 Sep 2012 13:53:19 +0300 Subject: [PATCH 162/164] Fixed compiler warning on Mac --- mysys/mf_iocache2.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mysys/mf_iocache2.c b/mysys/mf_iocache2.c index 72372ae6bc0..ff05b7fa485 100644 --- a/mysys/mf_iocache2.c +++ b/mysys/mf_iocache2.c @@ -440,7 +440,7 @@ process_flags: /* TODO: implement precision */ if (backtick_quoting) { - size_t total= my_b_write_backtick_quote(info, (uchar *) par, length2); + size_t total= my_b_write_backtick_quote(info, par, length2); if (total == (size_t)-1) goto err; out_length+= total; From 1539f91267a8ca11b137444a4cb87c61febfb05c Mon Sep 17 00:00:00 2001 From: Michael Widenius Date: Mon, 10 Sep 2012 16:46:33 +0300 Subject: [PATCH 163/164] Fixed Bug#1002564: Wrong result for a lookup query from a heap table mysql-test/suite/heap/heap_hash.result: Added test case mysql-test/suite/heap/heap_hash.test: Added test case storage/heap/hp_hash.c: Limit key data length to max key length --- mysql-test/suite/heap/heap_hash.result | 19 +++++++++++++++++++ mysql-test/suite/heap/heap_hash.test | 13 +++++++++++++ storage/heap/hp_hash.c | 9 +++++++++ 3 files changed, 41 insertions(+) diff --git a/mysql-test/suite/heap/heap_hash.result b/mysql-test/suite/heap/heap_hash.result index 453bfc0c165..ac62427c81c 100644 --- a/mysql-test/suite/heap/heap_hash.result +++ b/mysql-test/suite/heap/heap_hash.result @@ -427,4 +427,23 @@ INDEX(col_int_key) USING HASH) ENGINE = HEAP; INSERT INTO t1 (col_int_nokey, col_int_key) VALUES (3, 0), (4, 0), (3, 1); DELETE FROM t1 WHERE col_int_nokey = 5 ORDER BY col_int_key LIMIT 2; DROP TABLE t1; +# +# Bug #1002564: Wrong result for a lookup query from a heap table +# +CREATE TABLE t1 (c1 VARCHAR(10) NOT NULL, KEY i1 (c1(3))) ENGINE=MEMORY DEFAULT CHARSET=latin1; +INSERT INTO t1 VALUES ('foo1'), ('bar2'), ('baz3'); +explain SELECT * FROM t1 WHERE c1='bar2'; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ref i1 i1 5 const 2 Using where +SELECT * FROM t1 WHERE c1='bar2'; +c1 +bar2 +ALTER TABLE t1 DROP KEY i1, ADD KEY il (c1(3)) using btree; +explain SELECT * FROM t1 WHERE c1='bar2'; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ref il il 5 const 1 Using where +SELECT * FROM t1 WHERE c1='bar2'; +c1 +bar2 +DROP TABLE t1; End of 5.5 tests diff --git a/mysql-test/suite/heap/heap_hash.test b/mysql-test/suite/heap/heap_hash.test index 80ae01e9547..80d6ef9c8f2 100644 --- a/mysql-test/suite/heap/heap_hash.test +++ b/mysql-test/suite/heap/heap_hash.test @@ -316,4 +316,17 @@ DELETE FROM t1 WHERE col_int_nokey = 5 ORDER BY col_int_key LIMIT 2; DROP TABLE t1; +--echo # +--echo # Bug #1002564: Wrong result for a lookup query from a heap table +--echo # + +CREATE TABLE t1 (c1 VARCHAR(10) NOT NULL, KEY i1 (c1(3))) ENGINE=MEMORY DEFAULT CHARSET=latin1; +INSERT INTO t1 VALUES ('foo1'), ('bar2'), ('baz3'); +explain SELECT * FROM t1 WHERE c1='bar2'; +SELECT * FROM t1 WHERE c1='bar2'; +ALTER TABLE t1 DROP KEY i1, ADD KEY il (c1(3)) using btree; +explain SELECT * FROM t1 WHERE c1='bar2'; +SELECT * FROM t1 WHERE c1='bar2'; +DROP TABLE t1; + --echo End of 5.5 tests diff --git a/storage/heap/hp_hash.c b/storage/heap/hp_hash.c index d44726ba762..2abed55459c 100644 --- a/storage/heap/hp_hash.c +++ b/storage/heap/hp_hash.c @@ -348,6 +348,8 @@ ulong hp_rec_hashnr(register HP_KEYDEF *keydef, register const uchar *rec) seg->length/cs->mbmaxlen); set_if_smaller(length, char_length); } + else + set_if_smaller(length, seg->length); cs->coll->hash_sort(cs, pos+pack_length, length, &nr, &nr2); } else @@ -593,6 +595,11 @@ int hp_rec_key_cmp(HP_KEYDEF *keydef, const uchar *rec1, const uchar *rec2, char_length2= my_charpos(cs, pos2, pos2 + char_length2, char_length); set_if_smaller(char_length2, safe_length2); } + else + { + set_if_smaller(char_length1, seg->length); + set_if_smaller(char_length2, seg->length); + } if (cs->coll->strnncollsp(seg->charset, pos1, char_length1, @@ -689,6 +696,8 @@ int hp_key_cmp(HP_KEYDEF *keydef, const uchar *rec, const uchar *key) char_length2= my_charpos(cs, pos, pos + char_length_rec, char_length2); set_if_smaller(char_length_rec, char_length2); } + else + set_if_smaller(char_length_rec, seg->length); if (cs->coll->strnncollsp(seg->charset, (uchar*) pos, char_length_rec, From 6f94b5c76d51e655d36198d177972caa18089e31 Mon Sep 17 00:00:00 2001 From: Michael Widenius Date: Mon, 10 Sep 2012 17:26:54 +0300 Subject: [PATCH 164/164] Fixed random test failure mysql-test/include/index_merge2.inc: InnoDB did report 9 or 7 rows in explain --- mysql-test/include/index_merge2.inc | 1 + mysql-test/r/index_merge_innodb.result | 2 +- mysql-test/r/index_merge_myisam.result | 2 +- 3 files changed, 3 insertions(+), 2 deletions(-) diff --git a/mysql-test/include/index_merge2.inc b/mysql-test/include/index_merge2.inc index 1d6b82e1787..c50a45a9923 100644 --- a/mysql-test/include/index_merge2.inc +++ b/mysql-test/include/index_merge2.inc @@ -343,6 +343,7 @@ alter table t1 add index i3(key3); update t1 set key2=key1,key3=key1; # to test the bug, the following must use "sort_union": +--replace_column 9 REF explain select * from t1 where (key3 > 30 and key3<35) or (key2 >32 and key2 < 40); select * from t1 where (key3 > 30 and key3<35) or (key2 >32 and key2 < 40); drop table t1; diff --git a/mysql-test/r/index_merge_innodb.result b/mysql-test/r/index_merge_innodb.result index 92bcb2e88f0..b93d15f7bef 100644 --- a/mysql-test/r/index_merge_innodb.result +++ b/mysql-test/r/index_merge_innodb.result @@ -313,7 +313,7 @@ alter table t1 add index i3(key3); update t1 set key2=key1,key3=key1; explain select * from t1 where (key3 > 30 and key3<35) or (key2 >32 and key2 < 40); id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 index_merge i2,i3 i3,i2 4,4 NULL 9 Using sort_union(i3,i2); Using where +1 SIMPLE t1 index_merge i2,i3 i3,i2 4,4 NULL REF Using sort_union(i3,i2); Using where select * from t1 where (key3 > 30 and key3<35) or (key2 >32 and key2 < 40); key1 key2 key3 31 31 31 diff --git a/mysql-test/r/index_merge_myisam.result b/mysql-test/r/index_merge_myisam.result index bf151a872cf..0b6959d15a9 100644 --- a/mysql-test/r/index_merge_myisam.result +++ b/mysql-test/r/index_merge_myisam.result @@ -1146,7 +1146,7 @@ alter table t1 add index i3(key3); update t1 set key2=key1,key3=key1; explain select * from t1 where (key3 > 30 and key3<35) or (key2 >32 and key2 < 40); id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 index_merge i2,i3 i3,i2 4,4 NULL 11 Using sort_union(i3,i2); Using where +1 SIMPLE t1 index_merge i2,i3 i3,i2 4,4 NULL REF Using sort_union(i3,i2); Using where select * from t1 where (key3 > 30 and key3<35) or (key2 >32 and key2 < 40); key1 key2 key3 31 31 31