When read_only option was enabled, a user without SUPER privilege could
perform CREATE DATABASE and DROP DATABASE operations.
This patch adds a check to make sure this isn't possible. It also attempts to
simplify the logic used to determine if relevant tables are updated,
making it more human readable.
clause is silently ignored
When symbolic links are disabled by command line option or
NO_DIR_IN_CREATE sql mode, CREATE TABLE silently ignores
DATA/INDEX DIRECTORY options.
With this fix a warning is issued when symbolic links are disabled.
mysql-test/r/symlink.result:
A test case for BUG#25677.
mysql-test/t/symlink.test:
A test case for BUG#25677.
sql/sql_parse.cc:
Moved handling of situation when mysqld is compiled without
HAVE_READLINK to mysql_create_table_no_lock().
sql/sql_table.cc:
Issue a warning in case DATA/INDEX DIRECTORY is specified and:
- server is compiled without HAVE_READLINK;
- using symbolic links is disabled by command line option;
- using symbolic links is disabled by NO_DIR_IN_CREATE sql mode.
clause is silently ignored
When symbolic links are disabled by command line option or
NO_DIR_IN_CREATE sql mode, CREATE TABLE silently ignores
DATA/INDEX DIRECTORY options.
With this fix a warning is issued when symbolic links are disabled.
into ramayana.hindu.god:/home/tsmith/m/bk/maint/51
sql/sql_acl.cc:
Auto merged
sql/sql_parse.cc:
Auto merged
sql/sql_table.cc:
Auto merged
mysql-test/r/grant.result:
Manual merge
mysql-test/t/grant.test:
Manual merge
into ramayana.hindu.god:/home/tsmith/m/bk/maint/51-merge
client/mysqldump.c:
Auto merged
include/my_base.h:
Auto merged
include/my_sys.h:
Auto merged
libmysql/CMakeLists.txt:
Auto merged
libmysql/Makefile.shared:
Auto merged
mysql-test/lib/mtr_cases.pl:
Auto merged
mysql-test/mysql-test-run.pl:
Auto merged
mysql-test/r/create.result:
Auto merged
mysql-test/r/grant.result:
Auto merged
mysql-test/r/innodb.result:
Auto merged
mysql-test/r/ps.result:
Auto merged
mysql-test/suite/rpl/t/rpl_ssl.test:
Auto merged
mysql-test/t/cast.test:
Auto merged
mysql-test/t/create.test:
Auto merged
mysql-test/t/ps.test:
Auto merged
mysql-test/t/variables.test:
Auto merged
sql/field.cc:
Auto merged
sql/item_cmpfunc.cc:
Auto merged
sql/item_cmpfunc.h:
Auto merged
sql/item_timefunc.cc:
Auto merged
sql/opt_range.cc:
Auto merged
sql/records.cc:
Auto merged
sql/set_var.cc:
Auto merged
sql/set_var.h:
Auto merged
sql/sql_acl.cc:
Auto merged
sql/sql_parse.cc:
Auto merged
sql/sql_select.cc:
Auto merged
sql/sql_table.cc:
Auto merged
sql/unireg.cc:
Auto merged
storage/myisam/ft_boolean_search.c:
Auto merged
storage/myisam/ha_myisam.cc:
Auto merged
storage/myisam/sort.c:
Auto merged
mysql-test/t/log_state.test:
Manual merge fix-up
mysql-test/include/mix1.inc:
Manual merge
mysql-test/r/ctype_ucs.result:
Manual merge
mysql-test/r/func_misc.result:
Manual merge
mysql-test/r/innodb_mysql.result:
Manual merge
mysql-test/r/key.result:
Manual merge
mysql-test/r/log_state.result:
Manual merge
mysql-test/suite/binlog/t/binlog_killed.test:
Manual merge
mysql-test/t/ctype_ucs.test:
Manual merge
mysql-test/t/func_misc.test:
Manual merge
mysql-test/t/key.test:
Manual merge
sql/item_strfunc.h:
Manual merge
strings/ctype-simple.c:
Manual merge
Added debugger hook _my_dbug_put_break_here() that is called if we get a CRC that matches --debug-crc-break (my_crc_dbug_break)
Fixed REDO_REPAIR to use all repair modes (repair, repair_by_sort, repair_paralell
REDO_REPAIR now also logs used key map
Fixed some bugs in REDO logging of key pages
Better error messages from maria_read_log
Added my_readwrite_flags to init_pagecache() to be able to get better error messages and simplify code.
Don't allow pagecaches with less than 8 blocks (Causes strange crashes)
Added EXTRA_DEBUG_KEY_CHANGES. When this is defined some REDO_INDEX entries contains page checksums (these are calculated and checked in DBUG mode, ignored otherwise)
Fixed bug in ma_pagecache unit tests that caused program to sometimes fail
Added some missing calls to MY_INIT() that caused some unit tests to fail
Fixed that TRUNCATE works properly on temporary MyISAM files
Updates some result files to new table checksums results (checksum when NULL fields are ignored)
perl test-insert can be replayed with maria_read_log!
sql/share/Makefile.am:
Change mode to -rw-rw-r--
BitKeeper/etc/ignore:
added storage/maria/unittest/page_cache_test_file_1 storage/maria/unittest/pagecache_debug.log
include/maria.h:
Added maria_tmpdir
include/my_base.h:
Added error HA_ERR_FILE_TOO_SHORT
include/my_sys.h:
Added variable my_crc_dbug_check
Added function my_dbug_put_break_here()
include/myisamchk.h:
Added org_key_map (Needed for writing REDO record for REPAIR)
mysql-test/r/innodb.result:
Updated to new checksum algorithm (NULL ignored)
mysql-test/r/mix2_myisam.result:
Updated to new checksum algorithm (NULL ignored)
mysql-test/r/myisam.result:
Updated to new checksum algorithm (NULL ignored)
mysql-test/t/myisam.test:
Added used table
mysys/checksum.c:
Added DBUG for checksum results
Added debugger hook so that _my_dbug_put_break_here() is called if we get matching CRC
mysys/lf_alloc-pin.c:
Fixed compiler warning
mysys/my_handler.c:
Added new error message
mysys/my_init.c:
If my_progname is not given, use 'unknown' form my_progname_short
Added debugger function my_debug_put_break_here()
mysys/my_pread.c:
In case of too short file when MY_NABP or MY_FNABP is specified, give error HA_ERR_FILE_TO_SHORT
mysys/my_read.c:
In case of too short file when MY_NABP or MY_FNABP is specified, give error HA_ERR_FILE_TO_SHORT
sql/mysqld.cc:
Added debug option --debug-crc-break
sql/sql_parse.cc:
Trivial optimization
storage/maria/ha_maria.cc:
Renamed variable to be more logical
Ensure that param.testflag is correct when calling repair
Added extra argument to init_pagecache
Set default value for maria_tempdir
storage/maria/ma_blockrec.c:
Test for HA_ERR_FILE_TOO_SHORT instead for -1
storage/maria/ma_cache.c:
Test for HA_ERR_FILE_TOO_SHORT instead for -1
storage/maria/ma_check.c:
Set param->testflag to match how repair is run (needed for REDO logging)
Simple optimization
Moved flag if page is node from pagelength to keypage-flag byte
Log used key map in REDO log.
storage/maria/ma_delete.c:
Remember previous UNDO entry when writing undo (for future CLR records)
Moved flag if page is node from pagelength to keypage-flag byte
Fixed some bugs in redo logging
Added CRC for some translog REDO_INDEX entries
storage/maria/ma_dynrec.c:
Test for HA_ERR_FILE_TOO_SHORT instead for -1
storage/maria/ma_ft_update.c:
Fixed call to _ma_store_page_used()
storage/maria/ma_key_recover.c:
Added CRC for some translog REDO_INDEX entries
Removed not needed pagecache_write() in _ma_apply_redo_index()
storage/maria/ma_locking.c:
Test for HA_ERR_FILE_TOO_SHORT instead for -1
storage/maria/ma_loghandler.c:
Added used key map to REDO_REPAIR_TABLE
storage/maria/ma_loghandler.h:
Added operation for checksum of key pages
storage/maria/ma_open.c:
Allocate storage for undo lsn pointers
storage/maria/ma_pagecache.c:
Remove not needed include file
Change logging to use fd: for file descritors as other code
Added my_readwrite_flags to init_pagecache() to be able to get better error messages for maria_chk/maria_read_log
Don't allow pagecaches with less than 8 blocks
Remove wrong DBUG_ASSERT()
storage/maria/ma_pagecache.h:
Added readwrite_flags
storage/maria/ma_recovery.c:
Better error messages for maria_read_log:
- Added eprint() for printing error messages
- Print extra \n before error message if we are printing %0 %10 ...
Added used key_map to REDO_REPAIR log entry
More DBUG
Call same repair method that was used by mysqld
storage/maria/ma_rt_index.c:
Moved flag if page is node from pagelength to keypage-flag byte
storage/maria/ma_rt_key.c:
Fixed call to _ma_store_page_used()
storage/maria/ma_rt_split.c:
Moved flag if page is node from pagelength to keypage-flag byte
storage/maria/ma_static.c:
Added maria_tmpdir
storage/maria/ma_test1.c:
Updated call to init_pagecache()
storage/maria/ma_test2.c:
Updated call to init_pagecache()
storage/maria/ma_test3.c:
Updated call to init_pagecache()
storage/maria/ma_write.c:
Removed #ifdef NOT_YET
Moved flag if page is node from pagelength to keypage-flag byte
Fixed bug in _ma_log_del_prefix()
storage/maria/maria_chk.c:
Fixed wrong min limit for page_buffer_size
Updated call to init_pagecache()
storage/maria/maria_def.h:
Added EXTRA_DEBUG_KEY_CHANGES. When this is defined some REDO_INDEX entries contains page checksums
Moved flag if page is node from pagelength to keypage-flag byte
storage/maria/maria_ftdump.c:
Updated call to init_pagecache()
storage/maria/maria_pack.c:
Updated call to init_pagecache()
Reset share->state.create_rename_lsn & share->state.is_of_horizon
storage/maria/maria_read_log.c:
Better error messages
Added --tmpdir option (needed to set temporary directory for REDO_REPAIR)
Added --start-from-lsn
Changed option for --display-only to 'd' (wanted to use -o for 'offset')
storage/maria/unittest/lockman2-t.c:
Added missing call to MY_INIT()
storage/maria/unittest/ma_pagecache_consist.c:
Updated call to init_pagecache()
storage/maria/unittest/ma_pagecache_single.c:
Fixed bug that caused program to sometimes fail
Added some DBUG_ASSERTS()
Changed some calls to malloc()/free() to my_malloc()/my_free()
Create extra file to expose original hard-to-find bug
storage/maria/unittest/ma_test_loghandler-t.c:
Updated call to init_pagecache()
storage/maria/unittest/ma_test_loghandler_first_lsn-t.c:
Updated call to init_pagecache()
storage/maria/unittest/ma_test_loghandler_max_lsn-t.c:
Updated call to init_pagecache()
storage/maria/unittest/ma_test_loghandler_multigroup-t.c:
Updated call to init_pagecache()
storage/maria/unittest/ma_test_loghandler_multithread-t.c:
Updated call to init_pagecache()
storage/maria/unittest/ma_test_loghandler_noflush-t.c:
Updated call to init_pagecache()
storage/maria/unittest/ma_test_loghandler_pagecache-t.c:
Updated call to init_pagecache()
storage/maria/unittest/ma_test_loghandler_purge-t.c:
Updated call to init_pagecache()
storage/maria/unittest/test_file.c:
Changed malloc()/free() to my_malloc()/my_free()
Fixed memory leak
Changd logic a bit while trying to find bug in reset_file()
storage/maria/unittest/trnman-t.c:
Added missing call to MY_INIT()
storage/myisam/mi_cache.c:
Test for HA_ERR_FILE_TOO_SHORT instead for -1
storage/myisam/mi_create.c:
Removed O_EXCL to get TRUNCATE to work for temporary files
storage/myisam/mi_dynrec.c:
Test for HA_ERR_FILE_TOO_SHORT instead for -1
storage/myisam/mi_locking.c:
Test for HA_ERR_FILE_TOO_SHORT instead for -1
mysql-test/r/old-mode.result:
New BitKeeper file ``mysql-test/r/old-mode.result''
mysql-test/t/old-mode-master.opt:
New BitKeeper file ``mysql-test/t/old-mode-master.opt''
mysql-test/t/old-mode.test:
New BitKeeper file ``mysql-test/t/old-mode.test''
removed unnecessary privilege checks for I_S schema
mysql-test/r/information_schema.result:
test result
mysql-test/t/information_schema.test:
test case
sql/events.cc:
There is no events in I_S so we don't need to execute check_access here.
sql/sql_parse.cc:
removed unnecessary check
The problem was that THD::killed was reset after a command was
read from the socket, but before it was actually handled. That lead
to a race: if another KILL statement was issued for this connection
in the middle of reading from the socket and processing a command,
THD::killed state would be cleaned.
The fix is to move this cleanup into net_send_error() function.
A sample test case exists in binlog_killed.test:
- connection 1: start a new transaction on table t1;
- connection 2: send query to the server (w/o waiting for the
result) to update data in table t1 -- this query will be blocked
since there is unfinished transaction;
- connection 1: kill query in connection 2 and finish the transaction;
- connection 2: get result of the previous query -- it should be
the "query-killed" error.
This test however contains race condition, which can not be fixed
with the current protocol: there is no way to guarantee, that the
server will receive and start processing the query in connection 2
(which is intended to get blocked) before the KILL command (sent in
the connection 1) will arrive. In other words, there is no way to
ensure that the following sequence will not happen:
- connection 1: start a new transaction on table t1;
- connection 1: kill query in connection 2 and finish the transaction;
- connection 2: send query to the server (w/o waiting for the
result) to update data in table t1 -- this query will be blocked
since there is unfinished transaction;
- connection 2: get result of the previous query -- the query will
succeed.
So, there is no test case for this bug, since it's impossible
to write a reliable test case under the current circumstances.
sql/protocol.cc:
Move thd->killed cleanup from dispatch_command() to net_send_error().
sql/sql_parse.cc:
Move thd->killed cleanup from dispatch_command() to net_send_error().
The problem was that THD::killed was reset after a command was
read from the socket, but before it was actually handled. That lead
to a race: if another KILL statement was issued for this connection
in the middle of reading from the socket and processing a command,
THD::killed state would be cleaned.
The fix is to move this cleanup into net_send_error() function.
A sample test case exists in binlog_killed.test:
- connection 1: start a new transaction on table t1;
- connection 2: send query to the server (w/o waiting for the
result) to update data in table t1 -- this query will be blocked
since there is unfinished transaction;
- connection 1: kill query in connection 2 and finish the transaction;
- connection 2: get result of the previous query -- it should be
the "query-killed" error.
This test however contains race condition, which can not be fixed
with the current protocol: there is no way to guarantee, that the
server will receive and start processing the query in connection 2
(which is intended to get blocked) before the KILL command (sent in
the connection 1) will arrive. In other words, there is no way to
ensure that the following sequence will not happen:
- connection 1: start a new transaction on table t1;
- connection 1: kill query in connection 2 and finish the transaction;
- connection 2: send query to the server (w/o waiting for the
result) to update data in table t1 -- this query will be blocked
since there is unfinished transaction;
- connection 2: get result of the previous query -- the query will
succeed.
So, there is no test case for this bug, since it's impossible
to write a reliable test case under the current circumstances.
into lambda.hsd1.co.comcast.net.:/home/malff/TREE/mysql-5.1-rt-merge
sql/events.cc:
Auto merged
sql/item_func.cc:
Auto merged
sql/mysql_priv.h:
Auto merged
sql/mysqld.cc:
Auto merged
sql/sql_acl.cc:
Auto merged
sql/sql_base.cc:
Auto merged
sql/sql_lex.h:
Auto merged
sql/sql_parse.cc:
Auto merged
sql/sql_yacc.yy:
Auto merged
sql/sql_table.cc:
manual merge
into stella.local:/home2/mydev/mysql-5.1-axmrg
include/my_base.h:
Auto merged
mysql-test/mysql-test-run.pl:
Auto merged
mysql-test/suite/ndb/t/disabled.def:
Auto merged
mysql-test/t/partition.test:
Auto merged
sql/handler.cc:
Auto merged
sql/item_cmpfunc.cc:
Auto merged
sql/slave.cc:
Auto merged
sql/sql_insert.cc:
Auto merged
sql/sql_parse.cc:
Auto merged
sql/sql_select.cc:
Auto merged
sql/sql_table.cc:
Auto merged
sql/sql_yacc.yy:
Auto merged
client/mysql.cc:
Manual merge
mysql-test/suite/rpl/t/disabled.def:
Manual merge
into lambda.hsd1.co.comcast.net.:/home/malff/TREE/mysql-5.1-rt-merge
sql/mysqld.cc:
Auto merged
sql/sp_head.cc:
Auto merged
sql/sql_class.cc:
Auto merged
sql/sql_parse.cc:
Auto merged
sql/sql_table.cc:
Auto merged
sql/sql_yacc.yy:
Auto merged
into lambda.hsd1.co.comcast.net.:/home/malff/TREE/mysql-5.0-rt-merge
sql/mysqld.cc:
Auto merged
sql/sp_head.cc:
Auto merged
sql/sql_parse.cc:
Auto merged
into adventure.(none):/home/thek/Development/cpp/mysql-5.1-runtime
mysql-test/r/grant.result:
Auto merged
mysql-test/t/grant.test:
Auto merged
sql/sql_acl.cc:
Auto merged
sql/sql_parse.cc:
manual merge
Loading 4.1 into 5.0 or 5.1 failed silently because procs_priv table missing.
This caused the server to crash on any attempt to store new grants because
of uninitialized structures.
This patch breaks up the grant loading function into two phases to allow
for procs_priv table to fail with an warning instead of crashing the server.
mysql-test/r/grant.result:
Test case
mysql-test/t/grant.test:
Test case making sure that FLUSH PRIVILEGES doesn't crash the server if
procs_priv is removed.
sql/sql_acl.cc:
- Refactored grant_reload into two phases: 1. open and lock tables_priv and
columns_priv tables, read the data, close tables. 2. open and lock
procs_priv, read data, close table. Since the tables are independant of
each other there will be no race conditions and it will be possible to
handle situations where the procs_priv table isn't present.
- Refactored the helper function grant_load into new grant_load (without
procs_priv table) and grant_load_procs_priv.
sql/sql_parse.cc:
- Changed comment style to doxygen style.
Loading 4.1 into 5.0 or 5.1 failed silently because procs_priv table missing.
This caused the server to crash on any attempt to store new grants because
of uninitialized structures.
This patch breaks up the grant loading function into two phases to allow
for procs_priv table to fail with an warning instead of crashing the server.
FLUSH TABLES WITH READ LOCK fails to properly detect write locked
tables when running under low priority updates.
The problem is that when trying to aspire a global read lock, the
reload_acl_and_cache() function fails to properly check if the thread
has a low priority write lock, which later my cause a server crash or
deadlock.
The solution is to simple check if the thread has any type of the
possible exclusive write locks.
mysql-test/r/flush.result:
Add test case result for Bug#32528
mysql-test/t/flush.test:
Add test case for Bug#32528
sql/sql_parse.cc:
Although it should not matter under LOCK TABLES, use TL_WRITE_ALLOW_WRITE
to emphasize that it should fail in case of any write lock.
FLUSH TABLES WITH READ LOCK fails to properly detect write locked
tables when running under low priority updates.
The problem is that when trying to aspire a global read lock, the
reload_acl_and_cache() function fails to properly check if the thread
has a low priority write lock, which later my cause a server crash or
deadlock.
The solution is to simple check if the thread has any type of the
possible exclusive write locks.
corrupts a MERGE table
Bug 26867 - LOCK TABLES + REPAIR + merge table result in
memory/cpu hogging
Bug 26377 - Deadlock with MERGE and FLUSH TABLE
Bug 25038 - Waiting TRUNCATE
Bug 25700 - merge base tables get corrupted by
optimize/analyze/repair table
Bug 30275 - Merge tables: flush tables or unlock tables
causes server to crash
Bug 19627 - temporary merge table locking
Bug 27660 - Falcon: merge table possible
Bug 30273 - merge tables: Can't lock file (errno: 155)
The problems were:
Bug 26379 - Combination of FLUSH TABLE and REPAIR TABLE
corrupts a MERGE table
1. A thread trying to lock a MERGE table performs busy waiting while
REPAIR TABLE or a similar table administration task is ongoing on
one or more of its MyISAM tables.
2. A thread trying to lock a MERGE table performs busy waiting until all
threads that did REPAIR TABLE or similar table administration tasks
on one or more of its MyISAM tables in LOCK TABLES segments do UNLOCK
TABLES. The difference against problem #1 is that the busy waiting
takes place *after* the administration task. It is terminated by
UNLOCK TABLES only.
3. Two FLUSH TABLES within a LOCK TABLES segment can invalidate the
lock. This does *not* require a MERGE table. The first FLUSH TABLES
can be replaced by any statement that requires other threads to
reopen the table. In 5.0 and 5.1 a single FLUSH TABLES can provoke
the problem.
Bug 26867 - LOCK TABLES + REPAIR + merge table result in
memory/cpu hogging
Trying DML on a MERGE table, which has a child locked and
repaired by another thread, made an infinite loop in the server.
Bug 26377 - Deadlock with MERGE and FLUSH TABLE
Locking a MERGE table and its children in parent-child order
and flushing the child deadlocked the server.
Bug 25038 - Waiting TRUNCATE
Truncating a MERGE child, while the MERGE table was in use,
let the truncate fail instead of waiting for the table to
become free.
Bug 25700 - merge base tables get corrupted by
optimize/analyze/repair table
Repairing a child of an open MERGE table corrupted the child.
It was necessary to FLUSH the child first.
Bug 30275 - Merge tables: flush tables or unlock tables
causes server to crash
Flushing and optimizing locked MERGE children crashed the server.
Bug 19627 - temporary merge table locking
Use of a temporary MERGE table with non-temporary children
could corrupt the children.
Temporary tables are never locked. So we do now prohibit
non-temporary chidlren of a temporary MERGE table.
Bug 27660 - Falcon: merge table possible
It was possible to create a MERGE table with non-MyISAM children.
Bug 30273 - merge tables: Can't lock file (errno: 155)
This was a Windows-only bug. Table administration statements
sometimes failed with "Can't lock file (errno: 155)".
These bugs are fixed by a new implementation of MERGE table open.
When opening a MERGE table in open_tables() we do now add the
child tables to the list of tables to be opened by open_tables()
(the "query_list"). The children are not opened in the handler at
this stage.
After opening the parent, open_tables() opens each child from the
now extended query_list. When the last child is opened, we remove
the children from the query_list again and attach the children to
the parent. This behaves similar to the old open. However it does
not open the MyISAM tables directly, but grabs them from the already
open children.
When closing a MERGE table in close_thread_table() we detach the
children only. Closing of the children is done implicitly because
they are in thd->open_tables.
For more detail see the comment at the top of ha_myisammrg.cc.
Changed from open_ltable() to open_and_lock_tables() in all places
that can be relevant for MERGE tables. The latter can handle tables
added to the list on the fly. When open_ltable() was used in a loop
over a list of tables, the list must be temporarily terminated
after every table for open_and_lock_tables().
table_list->required_type is set to FRMTYPE_TABLE to avoid open of
special tables. Handling of derived tables is suppressed.
These details are handled by the new function
open_n_lock_single_table(), which has nearly the same signature as
open_ltable() and can replace it in most cases.
In reopen_tables() some of the tables open by a thread can be
closed and reopened. When a MERGE child is affected, the parent
must be closed and reopened too. Closing of the parent is forced
before the first child is closed. Reopen happens in the order of
thd->open_tables. MERGE parents do not attach their children
automatically at open. This is done after all tables are reopened.
So all children are open when attaching them.
Special lock handling like mysql_lock_abort() or mysql_lock_remove()
needs to be suppressed for MERGE children or forwarded to the parent.
This depends on the situation. In loops over all open tables one
suppresses child lock handling. When a single table is touched,
forwarding is done.
Behavioral changes:
===================
This patch changes the behavior of temporary MERGE tables.
Temporary MERGE must have temporary children.
The old behavior was wrong. A temporary table is not locked. Hence
even non-temporary children were not locked. See
Bug 19627 - temporary merge table locking.
You cannot change the union list of a non-temporary MERGE table
when LOCK TABLES is in effect. The following does *not* work:
CREATE TABLE m1 ... ENGINE=MRG_MYISAM ...;
LOCK TABLES t1 WRITE, t2 WRITE, m1 WRITE;
ALTER TABLE m1 ... UNION=(t1,t2) ...;
However, you can do this with a temporary MERGE table.
You cannot create a MERGE table with CREATE ... SELECT, neither
as a temporary MERGE table, nor as a non-temporary MERGE table.
CREATE TABLE m1 ... ENGINE=MRG_MYISAM ... SELECT ...;
Gives error message: table is not BASE TABLE.
include/my_base.h:
Bug#26379 - Combination of FLUSH TABLE and REPAIR TABLE
corrupts a MERGE table
Added HA_EXTRA_ATTACH_CHILDREN and HA_EXTRA_DETACH_CHILDREN.
include/myisammrg.h:
Bug#26379 - Combination of FLUSH TABLE and REPAIR TABLE
corrupts a MERGE table
Added element 'children_attached' to MYRG_INFO.
Added declarations for myrg_parent_open(),
myrg_attach_children() and myrg_detach_children()
for the new MERGE table open approach.
mysql-test/extra/binlog_tests/blackhole.test:
Bug#26379 - Combination of FLUSH TABLE and REPAIR TABLE
corrupts a MERGE table
Preliminarily added new error message with a comment.
mysql-test/r/create.result:
Bug#26379 - Combination of FLUSH TABLE and REPAIR TABLE
corrupts a MERGE table
Fixed test result.
mysql-test/r/delayed.result:
Bug#26379 - Combination of FLUSH TABLE and REPAIR TABLE
corrupts a MERGE table
Moved test result from here to merge.result.
mysql-test/r/merge.result:
Bug#26379 - Combination of FLUSH TABLE and REPAIR TABLE
corrupts a MERGE table
Fixed/added test result.
mysql-test/r/myisam.result:
Bug#26379 - Combination of FLUSH TABLE and REPAIR TABLE
corrupts a MERGE table
Moved test result for bug 8306 from here to merge.result.
mysql-test/suite/binlog/r/binlog_stm_blackhole.result:
Bug#26379 - Combination of FLUSH TABLE and REPAIR TABLE
corrupts a MERGE table
Fixed test result.
mysql-test/t/create.test:
Bug#26379 - Combination of FLUSH TABLE and REPAIR TABLE
corrupts a MERGE table
Fixed error number.
mysql-test/t/delayed.test:
Bug#26379 - Combination of FLUSH TABLE and REPAIR TABLE
corrupts a MERGE table
Moved test from here to merge.test.
mysql-test/t/merge.test:
Bug#26379 - Combination of FLUSH TABLE and REPAIR TABLE
corrupts a MERGE table
Fixed test for new temporary MERGE table behavior.
Exchanged error numbers by symbolic codes.
Added tests. Included are tests for bugs
8306 (moved from myisam.test), 26379, 19627, 25038, 25700, 26377,
26867, 27660, 30275, and 30273.
Fixed changes resulting from disabled CREATE...SELECT.
Integrated tests moved from delayed.test and myisam.test to here.
mysql-test/t/myisam.test:
Bug#26379 - Combination of FLUSH TABLE and REPAIR TABLE
corrupts a MERGE table
Moved test for bug 8306 from here to merge.test.
mysys/thr_lock.c:
Bug#26379 - Combination of FLUSH TABLE and REPAIR TABLE
corrupts a MERGE table
Added code to let the owner of a high priority lock (TL_WRITE_ONLY)
to bypass its own lock.
sql/ha_ndbcluster_binlog.cc:
Bug#26379 - Combination of FLUSH TABLE and REPAIR TABLE
corrupts a MERGE table
Added 'thd' argument to init_tmp_table_share().
sql/handler.cc:
Bug#26379 - Combination of FLUSH TABLE and REPAIR TABLE
corrupts a MERGE table
Added 'thd' argument to init_tmp_table_share().
sql/mysql_priv.h:
Bug#26379 - Combination of FLUSH TABLE and REPAIR TABLE
corrupts a MERGE table
Removed declaration of check_merge_table_access(). It is now static
in sql_parse.cc.
Added declaration for fix_merge_after_open().
Renamed open_and_lock_tables() to open_and_lock_tables_derived()
with additional parameter 'derived'.
Added inline functions simple_open_n_lock_tables() and
open_and_lock_tables(), which call open_and_lock_tables_derived()
and add the argument for 'derived'.
Added new function open_n_lock_single_table(), which can be used
as an replacement for open_ltable() in most situations. Internally
it calls simple_open_n_lock_tables() so hat it is appropriate for
MERGE tables.
Added 'thd' argument to init_tmp_table_share().
sql/slave.cc:
ug#26379 - Combination of FLUSH TABLE and REPAIR TABLE
corrupts a MERGE table
Added comment.
sql/sql_base.cc:
Bug#26379 - Combination of FLUSH TABLE and REPAIR TABLE
corrupts a MERGE table
Defined new functions add_merge_table_list(),
attach_merge_children(), detach_merge_children(), and
fix_merge_after_open() for the new MERGE table open approach.
Added calls of the new functions to
close_handle_and_leave_table_as_lock(), close_thread_tables(),
close_thread_table(), unlink_open_table(), reopen_name_locked_table(),
reopen_table(), drop_locked_tables(), close_temporary_table(),
and open_tables() respectively.
Prevented special lock handling of merge children (like
mysql_lock_remove, mysql_lock_merge or mysql_lock_abort)
at many places. Some of these calls are forwarded to the
parent table instead.
Added code to set thd->some_tables_deleted for every thread that has
a table open that we are flushing.
Added code for MERGE tables to unlink_open_table().
Added MERGE children to the list of unusable tables in open_table().
Added MERGE table handling to reopen_table().
Added lock handling and closing of a parent before the children
in close_data_files_and_morph_locks().
Added code for re-attaching children in reopen_tables().
Added MYSQL_LOCK_NOTIFY_IF_NEED_REOPEN to the locking flags and
error reporting after mysql_lock_tables() in reopen_tables().
Added lock handling and closing of a parent before the children
in close_old_data_files().
Added lock handling and detaching in drop_locked_tables().
Added code for removing the children list from the statement list
to prepare for a repetition in open_tables().
Added new function open_n_lock_single_table(), which can be used
as an replacement for open_ltable() in most situations. Internally
it calls simple_open_n_lock_tables() so hat it is appropriate for
MERGE tables.
Disabled use of open_ltable() for MERGE tables.
Removed function simple_open_n_lock_tables(). It is now inline
declared in mysql_priv.h.
Renamed open_and_lock_tables() to open_and_lock_tables_derived()
with additional parameter 'derived'. open_and_lock_tables() is now
inline declared in mysql_priv.h.
Added a check for end-of-list in two loops in lock_tables().
Added 'thd' argument to init_tmp_table_share().
sql/sql_insert.cc:
Bug#26379 - Combination of FLUSH TABLE and REPAIR TABLE
corrupts a MERGE table
Changed from open_ltable() to open_n_lock_single_table() in
handle_delayed_insert().
Reestablished LEX settings after lex initialization.
Added 'thd' argument to init_tmp_table_share().
sql/sql_parse.cc:
Bug#26379 - Combination of FLUSH TABLE and REPAIR TABLE
corrupts a MERGE table
Made check_merge_table_access() a static function.
Disabled use of CREATE...SELECT for MERGE tables.
sql/sql_partition.cc:
Bug#26379 - Combination of FLUSH TABLE and REPAIR TABLE
corrupts a MERGE table
Fixed comment typo.
sql/sql_select.cc:
Bug#26379 - Combination of FLUSH TABLE and REPAIR TABLE
corrupts a MERGE table
Added 'thd' argument to init_tmp_table_share().
sql/sql_table.cc:
Bug#26379 - Combination of FLUSH TABLE and REPAIR TABLE
corrupts a MERGE table
Optimized use of mysql_ha_flush() in mysql_rm_table_part2().
Disabled the use of MERGE tables with prepare_for_restore() and
prepare_for_repair().
Changed from open_ltable() to open_n_lock_single_table() in
mysql_alter_table() and mysql_checksum_table().
Disabled change of child list under LOCK TABLES.
Initialized table_list->table in mysql_recreate_table().
sql/sql_trigger.cc:
Bug#26379 - Combination of FLUSH TABLE and REPAIR TABLE
corrupts a MERGE table
Added code for allowing CREATE TRIGGER under LOCK TABLE, to be able
to test it with MERGE tables.
sql/table.cc:
Bug#26379 - Combination of FLUSH TABLE and REPAIR TABLE
corrupts a MERGE table
Added 'thd' argument to init_tmp_table_share().
Setting table_map_id from query_id in init_tmp_table_share().
Added member function TABLE::is_children_attached().
sql/table.h:
Bug#26379 - Combination of FLUSH TABLE and REPAIR TABLE
corrupts a MERGE table
Added access method get_table_def_version() to TABLE_SHARE.
Added elements for MERGE tables to TABLE and TABLE_LIST.
storage/myisam/ha_myisam.cc:
Bug#26379 - Combination of FLUSH TABLE and REPAIR TABLE
corrupts a MERGE table
Added an unrelated comment to the function comment of table2myisam().
storage/myisam/ha_myisam.h:
Bug#26379 - Combination of FLUSH TABLE and REPAIR TABLE
corrupts a MERGE table
Added new member function MI_INFO::file_ptr().
storage/myisammrg/ha_myisammrg.cc:
Bug#26379 - Combination of FLUSH TABLE and REPAIR TABLE
corrupts a MERGE table
Added callback functions to support parent open and children attach
of MERGE tables.
Changed ha_myisammrg::open() to initialize storage engine structures
and create a list of child tables only. Child tables are not opened.
Added ha_myisammrg::attach_children(), which does now the main part
of MERGE open.
Added ha_myisammrg::detach_children().
Added calls to ::attach_children() and ::detach_children() to
::extra() on HA_EXTRA_ATTACH_CHILDREN and HA_EXTRA_DETACH_CHILDREN
respectively.
Added a check for matching TEMPORARY type for children against
parent.
Added a check for table def version.
Added support for thd->open_options to attach_children().
Changed child path name generation for temporary tables so that
it does nothing special for temporary tables.
storage/myisammrg/ha_myisammrg.h:
Bug#26379 - Combination of FLUSH TABLE and REPAIR TABLE
corrupts a MERGE table
Added elements to class ha_myisammrg to support the new
open approach.
Changed empty destructor definition to a declaration.
Implemented in ha_myisammrg.cc.
Added declaration for methods attach_children() and
detach_children().
Added definition for method table_ptr() for use with
callback functions.
storage/myisammrg/myrg_close.c:
Bug#26379 - Combination of FLUSH TABLE and REPAIR TABLE
corrupts a MERGE table
Added a check to avoid closing of MyISAM tables when the
child tables are not attached.
Added freeing of rec_per_key_part when the child tables
are not attached.
storage/myisammrg/myrg_extra.c:
Bug#26379 - Combination of FLUSH TABLE and REPAIR TABLE
corrupts a MERGE table
Some ::extra() functions and ::reset() can be called when
children are detached.
storage/myisammrg/myrg_open.c:
Bug#26379 - Combination of FLUSH TABLE and REPAIR TABLE
corrupts a MERGE table
Kept old myrg_open() for MERGE use independent from MySQL.
Removed an always true condition in myrg_open().
Set children_attached for independent MERGE use in myrg_open().
Added myrg_parent_open(), myrg_attach_children(), and
myrg_detach_children() for the new MERGE table open approach.
mysql-test/r/merge-big.result:
Bug#26379 - Combination of FLUSH TABLE and REPAIR TABLE corrupts a MERGE table
New test result
mysql-test/t/merge-big.test:
Bug#26379 - Combination of FLUSH TABLE and REPAIR TABLE corrupts a MERGE table
New test case
corrupts a MERGE table
Bug 26867 - LOCK TABLES + REPAIR + merge table result in
memory/cpu hogging
Bug 26377 - Deadlock with MERGE and FLUSH TABLE
Bug 25038 - Waiting TRUNCATE
Bug 25700 - merge base tables get corrupted by
optimize/analyze/repair table
Bug 30275 - Merge tables: flush tables or unlock tables
causes server to crash
Bug 19627 - temporary merge table locking
Bug 27660 - Falcon: merge table possible
Bug 30273 - merge tables: Can't lock file (errno: 155)
The problems were:
Bug 26379 - Combination of FLUSH TABLE and REPAIR TABLE
corrupts a MERGE table
1. A thread trying to lock a MERGE table performs busy waiting while
REPAIR TABLE or a similar table administration task is ongoing on
one or more of its MyISAM tables.
2. A thread trying to lock a MERGE table performs busy waiting until all
threads that did REPAIR TABLE or similar table administration tasks
on one or more of its MyISAM tables in LOCK TABLES segments do UNLOCK
TABLES. The difference against problem #1 is that the busy waiting
takes place *after* the administration task. It is terminated by
UNLOCK TABLES only.
3. Two FLUSH TABLES within a LOCK TABLES segment can invalidate the
lock. This does *not* require a MERGE table. The first FLUSH TABLES
can be replaced by any statement that requires other threads to
reopen the table. In 5.0 and 5.1 a single FLUSH TABLES can provoke
the problem.
Bug 26867 - LOCK TABLES + REPAIR + merge table result in
memory/cpu hogging
Trying DML on a MERGE table, which has a child locked and
repaired by another thread, made an infinite loop in the server.
Bug 26377 - Deadlock with MERGE and FLUSH TABLE
Locking a MERGE table and its children in parent-child order
and flushing the child deadlocked the server.
Bug 25038 - Waiting TRUNCATE
Truncating a MERGE child, while the MERGE table was in use,
let the truncate fail instead of waiting for the table to
become free.
Bug 25700 - merge base tables get corrupted by
optimize/analyze/repair table
Repairing a child of an open MERGE table corrupted the child.
It was necessary to FLUSH the child first.
Bug 30275 - Merge tables: flush tables or unlock tables
causes server to crash
Flushing and optimizing locked MERGE children crashed the server.
Bug 19627 - temporary merge table locking
Use of a temporary MERGE table with non-temporary children
could corrupt the children.
Temporary tables are never locked. So we do now prohibit
non-temporary chidlren of a temporary MERGE table.
Bug 27660 - Falcon: merge table possible
It was possible to create a MERGE table with non-MyISAM children.
Bug 30273 - merge tables: Can't lock file (errno: 155)
This was a Windows-only bug. Table administration statements
sometimes failed with "Can't lock file (errno: 155)".
These bugs are fixed by a new implementation of MERGE table open.
When opening a MERGE table in open_tables() we do now add the
child tables to the list of tables to be opened by open_tables()
(the "query_list"). The children are not opened in the handler at
this stage.
After opening the parent, open_tables() opens each child from the
now extended query_list. When the last child is opened, we remove
the children from the query_list again and attach the children to
the parent. This behaves similar to the old open. However it does
not open the MyISAM tables directly, but grabs them from the already
open children.
When closing a MERGE table in close_thread_table() we detach the
children only. Closing of the children is done implicitly because
they are in thd->open_tables.
For more detail see the comment at the top of ha_myisammrg.cc.
Changed from open_ltable() to open_and_lock_tables() in all places
that can be relevant for MERGE tables. The latter can handle tables
added to the list on the fly. When open_ltable() was used in a loop
over a list of tables, the list must be temporarily terminated
after every table for open_and_lock_tables().
table_list->required_type is set to FRMTYPE_TABLE to avoid open of
special tables. Handling of derived tables is suppressed.
These details are handled by the new function
open_n_lock_single_table(), which has nearly the same signature as
open_ltable() and can replace it in most cases.
In reopen_tables() some of the tables open by a thread can be
closed and reopened. When a MERGE child is affected, the parent
must be closed and reopened too. Closing of the parent is forced
before the first child is closed. Reopen happens in the order of
thd->open_tables. MERGE parents do not attach their children
automatically at open. This is done after all tables are reopened.
So all children are open when attaching them.
Special lock handling like mysql_lock_abort() or mysql_lock_remove()
needs to be suppressed for MERGE children or forwarded to the parent.
This depends on the situation. In loops over all open tables one
suppresses child lock handling. When a single table is touched,
forwarding is done.
Behavioral changes:
===================
This patch changes the behavior of temporary MERGE tables.
Temporary MERGE must have temporary children.
The old behavior was wrong. A temporary table is not locked. Hence
even non-temporary children were not locked. See
Bug 19627 - temporary merge table locking.
You cannot change the union list of a non-temporary MERGE table
when LOCK TABLES is in effect. The following does *not* work:
CREATE TABLE m1 ... ENGINE=MRG_MYISAM ...;
LOCK TABLES t1 WRITE, t2 WRITE, m1 WRITE;
ALTER TABLE m1 ... UNION=(t1,t2) ...;
However, you can do this with a temporary MERGE table.
You cannot create a MERGE table with CREATE ... SELECT, neither
as a temporary MERGE table, nor as a non-temporary MERGE table.
CREATE TABLE m1 ... ENGINE=MRG_MYISAM ... SELECT ...;
Gives error message: table is not BASE TABLE.
history entries. Lazy deletion isn't smart or useful here.
Backport from 5.1 .
include/my_sys.h:
Prepare for rename in 5.1.
mysql-test/r/profiling.result:
Backport tests from 5.1.
mysql-test/t/profiling.test:
Backport tests from 5.1.
sql/mysql_priv.h:
Backport changes from 5.1 .
sql/sp_head.cc:
Backport changes from 5.1 .
sql/sql_class.cc:
Backport changes from 5.1 .
sql/sql_parse.cc:
Backport changes from 5.1 .
sql/sql_profile.cc:
Push history-limiting code until after the code that adds new
history entries. Lazy deletion isn't smart or useful here.
Correct for 5.0 member existance and execution.
sql/sql_profile.h:
Backport changes from 5.1 .
sql/sql_show.cc:
Backport changes from 5.1 .
into dl145h.mysql.com:/data0/mkindahl/mysql-5.1-new-rpl
mysql-test/extra/rpl_tests/rpl_extraMaster_Col.test:
Auto merged
mysql-test/mysql-test-run.pl:
Auto merged
mysql-test/suite/rpl/include/rpl_mixed_dml.inc:
Auto merged
mysql-test/suite/rpl/r/rpl_bug31076.result:
Auto merged
mysql-test/suite/rpl/t/rpl_bug31076.test:
Auto merged
mysql-test/suite/rpl/t/rpl_innodb_bug28430.test:
Auto merged
mysql-test/suite/rpl_ndb/t/disabled.def:
Auto merged
sql/field.cc:
Auto merged
sql/ha_ndbcluster.cc:
Auto merged
sql/handler.cc:
Auto merged
sql/log.cc:
Auto merged
sql/log_event.cc:
Auto merged
sql/log_event_old.cc:
Auto merged
sql/mysqld.cc:
Auto merged
sql/slave.cc:
Auto merged
sql/sp_head.cc:
Auto merged
sql/sql_class.cc:
Auto merged
sql/sql_class.h:
Auto merged
sql/sql_insert.cc:
Auto merged
sql/sql_parse.cc:
Auto merged
sql/sql_select.cc:
Auto merged
sql/sql_table.cc:
Auto merged
sql/sql_update.cc:
Auto merged
sql/sql_yacc.yy:
Auto merged
mysql-test/t/partition.test:
Manual merge.
BitKeeper/deleted/.del-rpl_row_extraColmaster_ndb.result~a2c64bae75b49d2:
Manual merge.
mysql-test/suite/rpl/r/rpl_extraColmaster_innodb.result:
Manual merge.
mysql-test/suite/rpl/r/rpl_extraColmaster_myisam.result:
Manual merge.
mysql-test/suite/rpl/t/disabled.def:
Manual merge.
sql/sql_delete.cc:
Manual merge.
Crash happens as a result of NO_EMBEDDED_ACCESS_CHECKS option
(which is default for embedded server).
check_table_access failed on using unintialized structure.
Better solutions here is to disable that code completely in this case.
Though the crash happens only in 6.0 i belive it's good to do it in 5.1
sql/mysql_priv.h:
Bug #31960 All embedded test crash.
Access check functions from sql_parse.cc defined as FALSE if
NO_EMBEDDED_ACCESS_CHECKS
sql/sql_parse.cc:
Bug #31960 All embedded test crash.
Implementation of access checkings functions #ifdefed out for
NO_EMBEDDED_ACCESS_CHECKS
Crash happens as a result of NO_EMBEDDED_ACCESS_CHECKS option
(which is default for embedded server).
check_table_access failed on using unintialized structure.
Better solutions here is to disable that code completely in this case.
Though the crash happens only in 6.0 i belive it's good to do it in 5.1
read.
Do not store profiling information when there is no query text. We
don't wish to capture non-COM_QUERY packets.
sql/sql_parse.cc:
Start profiling immediately after a command packet is read from
the network.
sql/sql_profile.cc:
Do not store items for which there is no query, i.e., protocol API
calls (non-COM_QUERY) and such.
into zippy.cornsilk.net:/home/cmiller/work/mysql/mysql-5.1-forcollapseandmerge
sql/ha_ndbcluster.cc:
Auto merged
sql/item_func.cc:
Auto merged
sql/log_event.cc:
Auto merged
sql/mysql_priv.h:
Auto merged
sql/mysqld.cc:
Auto merged
sql/set_var.cc:
Auto merged
sql/slave.cc:
Auto merged
sql/sp_head.cc:
Auto merged
sql/sql_base.cc:
Auto merged
sql/sql_class.cc:
Auto merged
sql/sql_class.h:
Auto merged
sql/sql_delete.cc:
Auto merged
sql/sql_insert.cc:
Auto merged
sql/sql_lex.h:
Auto merged
sql/sql_prepare.cc:
Auto merged
sql/sql_table.cc:
Auto merged
sql/sql_update.cc:
Auto merged
sql/sql_view.cc:
Auto merged
sql/sql_yacc.yy:
Auto merged
sql/table.h:
Auto merged
sql/sql_parse.cc:
Manual merge.
sql/sql_select.cc:
Manual merge.
Between 5.0 and 5.1, the step of incrementing the global query id
changed, which broke how the profiler noticed when a new query had
started. That reset the state list and caused all but the last
five (or so) states to be thrown away.
Now, don't watch for query_id changes in the lower level.
Add a bogus state change at the end of profiling so that the last
real state change is timed.
Emit source reference for the start of the span of time instead of
the end of it.
mysql-test/r/profiling.result:
Add a test that shows continuation of execution with multi-statement
packets.
mysql-test/t/profiling.test:
Add a test that shows continuation of execution with multi-statement
packets.
sql/sql_parse.cc:
Insert profiling calls at beginnings and ends of each query.
Remove the old way of keeping or discarding profiles, and flipping
to new query profiles.
sql/sql_profile.cc:
No longer use the thread's query_id to determine when we flip
to a new statement.
Some status statements are set to be NULL in the server. We don't
log those, as it doesn't fit this style of profiling yet.
Rewrite the parser code to be more active and legible.
Relying on passive/lazy discovery of new queries was buggy.
Add a bogus status change before ending a profile, so that the
previous real status has a endpoint.
Emit source reference of the start of the span-of-time instead of
the end of it.
sql/sql_profile.h:
Store the server_query_id at instantiation time for a new query.
Rewrite the parser code to be more active. Relying on passive/lazy
discovery of new queries was buggy.
Name first state to more honestly describe the state. We don't
really know of initialization that will follow.
sql/sql_show.cc:
Update comment to note the decidedly weird field_length behavior
on Decimal types in information_schema.
Between 5.0 and 5.1, the step of incrementing the global query id
changed, which broke how the profiler noticed when a new query had
started. That reset the state list and caused all but the last
five (or so) states to be thrown away.
Now, don't watch for query_id changes in the lower level.
Add a bogus state change at the end of profiling so that the last
real state change is timed.
Emit source reference for the start of the span of time instead of
the end of it.
into hynda.mysql.fi:/home/my/mysql-5.1-marvel
BitKeeper/etc/ignore:
auto-union
client/mysql_upgrade.c:
Auto merged
client/mysqlcheck.c:
Auto merged
client/mysqldump.c:
Auto merged
client/mysqlimport.c:
Auto merged
client/mysqlshow.c:
Auto merged
client/mysqlslap.c:
Auto merged
client/mysqltest.c:
Auto merged
include/my_global.h:
Auto merged
include/my_sys.h:
Auto merged
mysys/mf_keycache.c:
Auto merged
mysys/my_init.c:
Auto merged
mysys/safemalloc.c:
Auto merged
sql/ha_partition.cc:
Auto merged
sql/handler.cc:
Auto merged
sql/item_func.cc:
Auto merged
sql/log.cc:
Auto merged
sql/mysql_priv.h:
Auto merged
sql/mysqld.cc:
Auto merged
sql/opt_range.cc:
Auto merged
sql/set_var.cc:
Auto merged
sql/sql_class.cc:
Auto merged
sql/sql_parse.cc:
Auto merged
sql/sql_select.cc:
Auto merged
sql/sql_show.cc:
Auto merged
sql/sql_table.cc:
Auto merged
sql/table.cc:
Auto merged
sql/table.h:
Auto merged
sql/unireg.cc:
Auto merged
storage/myisam/ha_myisam.cc:
Auto merged
storage/myisam/mi_write.c:
Auto merged
sql/sql_yacc.yy:
Merged with 5.1 main tree.
that affect profiling.
mysql-test/r/information_schema.result:
Merge fixed. This result moved to a new file.
sql/sql_parse.cc:
Include profiling in statistics.
Add hook for SHOW_PROFILE in execution.
sql/sql_profile.cc:
Move/add the FEATURE_DISABLED warning to the I_S filling func.
Fix merge, where a new member was added to ST_FIELD_INFO.
orig_sql_command method was removed from Lex structure.
sql/sql_show.cc:
Fix merge problem.
sql/sql_yacc.yy:
orig_sql_command member removed from Lex structure in 5.1 .
