From fda27597eef5315ae0334ce6354d0dfe807e6672 Mon Sep 17 00:00:00 2001 From: unknown Date: Fri, 18 May 2007 12:29:06 +0400 Subject: [PATCH 1/6] Bug #27907 "Misleading error message when opening/locking tables" Adjust the check that defines the error message to be returned. mysql-test/r/sp-error.result: Update results (more accurate error code) mysql-test/r/sp-prelocking.result: Update results (more accurate error code) mysql-test/r/trigger.result: Update results (more accurate error code) mysql-test/t/sp-error.test: ER_NOT_LOCKED -> ER_NO_SUCH_TABLE mysql-test/t/sp-prelocking.test: Add a test case for Bug#27907 mysql-test/t/trigger.test: ER_NOT_LOCKED -> ER_NO_SUCH_TABLE sql/sql_base.cc: Adjust the check for where-we-are for a better error message. --- mysql-test/r/sp-error.result | 6 +++--- mysql-test/r/sp-prelocking.result | 13 +++++++++++++ mysql-test/r/trigger.result | 4 ++-- mysql-test/t/sp-error.test | 6 +++--- mysql-test/t/sp-prelocking.test | 31 +++++++++++++++++++++++++++++++ mysql-test/t/trigger.test | 4 ++-- sql/sql_base.cc | 13 ++++++++++--- 7 files changed, 64 insertions(+), 13 deletions(-) diff --git a/mysql-test/r/sp-error.result b/mysql-test/r/sp-error.result index bdcb51c4db8..7a2f812cde4 100644 --- a/mysql-test/r/sp-error.result +++ b/mysql-test/r/sp-error.result @@ -1030,7 +1030,7 @@ select bug12329(); bug12329() 101 execute stmt1; -ERROR HY000: Table 't2' was not locked with LOCK TABLES +ERROR 42S02: Table 'test.t2' doesn't exist deallocate prepare stmt1; drop function bug12329; drop table t1, t2; @@ -1152,12 +1152,12 @@ create trigger t1_ai after insert on t1 for each row insert into t2 values (new. create view v1 as select * from t1; drop table t2; insert into v1 values (1); -ERROR HY000: Table 't2' was not locked with LOCK TABLES +ERROR 42S02: Table 'test.t2' doesn't exist drop trigger t1_ai; create function bug11555_1() returns int return (select max(i) from t2); create trigger t1_ai after insert on t1 for each row set @a:=bug11555_1(); insert into v1 values (2); -ERROR HY000: Table 't2' was not locked with LOCK TABLES +ERROR 42S02: Table 'test.t2' doesn't exist drop function bug11555_1; drop table t1; drop view v1; diff --git a/mysql-test/r/sp-prelocking.result b/mysql-test/r/sp-prelocking.result index 7d8dd862748..5eac54803f0 100644 --- a/mysql-test/r/sp-prelocking.result +++ b/mysql-test/r/sp-prelocking.result @@ -254,4 +254,17 @@ execute stmt; deallocate prepare stmt; drop function bug19634; drop table t1, t2, t3; +drop table if exists bug_27907_logs; +drop table if exists bug_27907_t1; +create table bug_27907_logs (a int); +create table bug_27907_t1 (a int); +create trigger bug_27907_t1_ai after insert on bug_27907_t1 +for each row +begin +insert into bug_27907_logs (a) values (1); +end| +drop table bug_27907_logs; +insert into bug_27907_t1(a) values (1); +ERROR 42S02: Table 'test.bug_27907_logs' doesn't exist +drop table bug_27907_t1; End of 5.0 tests diff --git a/mysql-test/r/trigger.result b/mysql-test/r/trigger.result index 3e6a901dc00..196a990c673 100644 --- a/mysql-test/r/trigger.result +++ b/mysql-test/r/trigger.result @@ -820,9 +820,9 @@ call p1(); drop trigger t1_bi; create trigger t1_bi after insert on t1 for each row insert into t3 values (new.id); execute stmt1; -ERROR HY000: Table 't3' was not locked with LOCK TABLES +ERROR 42S02: Table 'test.t3' doesn't exist call p1(); -ERROR HY000: Table 't3' was not locked with LOCK TABLES +ERROR 42S02: Table 'test.t3' doesn't exist deallocate prepare stmt1; drop procedure p1; drop table t1, t2, t3; diff --git a/mysql-test/t/sp-error.test b/mysql-test/t/sp-error.test index 9e5c795d586..ec91be13ba0 100644 --- a/mysql-test/t/sp-error.test +++ b/mysql-test/t/sp-error.test @@ -1454,7 +1454,7 @@ select bug12329(); # Until we implement proper mechanism for invalidation of PS/SP when table # or SP's are changed the following statement will fail with 'Table ... was # not locked' error (this mechanism should be based on the new TDC). ---error 1100 +--error ER_NO_SUCH_TABLE execute stmt1; deallocate prepare stmt1; drop function bug12329; @@ -1639,13 +1639,13 @@ create trigger t1_ai after insert on t1 for each row insert into t2 values (new. create view v1 as select * from t1; drop table t2; # Limitation, the desired error is ER_VIEW_INVALID ---error ER_TABLE_NOT_LOCKED +--error ER_NO_SUCH_TABLE insert into v1 values (1); drop trigger t1_ai; create function bug11555_1() returns int return (select max(i) from t2); create trigger t1_ai after insert on t1 for each row set @a:=bug11555_1(); # Limitation, the desired error is ER_VIEW_INVALID ---error ER_TABLE_NOT_LOCKED +--error ER_NO_SUCH_TABLE insert into v1 values (2); drop function bug11555_1; drop table t1; diff --git a/mysql-test/t/sp-prelocking.test b/mysql-test/t/sp-prelocking.test index cc3e3b93e06..ec5b7fbad7c 100644 --- a/mysql-test/t/sp-prelocking.test +++ b/mysql-test/t/sp-prelocking.test @@ -301,5 +301,36 @@ deallocate prepare stmt; drop function bug19634; drop table t1, t2, t3; +# +# Bug #27907 Misleading error message when opening/locking tables +# + +--disable_warnings +drop table if exists bug_27907_logs; +drop table if exists bug_27907_t1; +--enable_warnings + +create table bug_27907_logs (a int); +create table bug_27907_t1 (a int); + +delimiter |; + +create trigger bug_27907_t1_ai after insert on bug_27907_t1 +for each row +begin + insert into bug_27907_logs (a) values (1); +end| + +delimiter ;| + +drop table bug_27907_logs; + +# +# was failing before with error ER_NOT_LOCKED +# +--error ER_NO_SUCH_TABLE +insert into bug_27907_t1(a) values (1); + +drop table bug_27907_t1; --echo End of 5.0 tests diff --git a/mysql-test/t/trigger.test b/mysql-test/t/trigger.test index 82de4dac111..43a582439fb 100644 --- a/mysql-test/t/trigger.test +++ b/mysql-test/t/trigger.test @@ -1000,9 +1000,9 @@ create trigger t1_bi after insert on t1 for each row insert into t3 values (new. # Until we implement proper mechanism for invalidation of PS/SP when table # or SP's are changed these two statements will fail with 'Table ... was # not locked' error (this mechanism should be based on the new TDC). ---error 1100 #ER_TABLE_NOT_LOCKED +--error ER_NO_SUCH_TABLE execute stmt1; ---error 1100 #ER_TABLE_NOT_LOCKED +--error ER_NO_SUCH_TABLE call p1(); deallocate prepare stmt1; drop procedure p1; diff --git a/sql/sql_base.cc b/sql/sql_base.cc index ed48ca577fb..4f70d115e76 100644 --- a/sql/sql_base.cc +++ b/sql/sql_base.cc @@ -1669,10 +1669,17 @@ TABLE *open_table(THD *thd, TABLE_LIST *table_list, MEM_ROOT *mem_root, VOID(pthread_mutex_unlock(&LOCK_open)); } } - if ((thd->locked_tables) && (thd->locked_tables->lock_count > 0)) - my_error(ER_TABLE_NOT_LOCKED, MYF(0), alias); - else + /* + No table in the locked tables list. In case of explicit LOCK TABLES + this can happen if a user did not include the able into the list. + In case of pre-locked mode locked tables list is generated automatically, + so we may only end up here if the table did not exist when + locked tables list was created. + */ + if (thd->prelocked_mode == PRELOCKED) my_error(ER_NO_SUCH_TABLE, MYF(0), table_list->db, table_list->alias); + else + my_error(ER_TABLE_NOT_LOCKED, MYF(0), alias); DBUG_RETURN(0); } From f9d7642e7b46d911cda5512ac0bcb55dd85dcd95 Mon Sep 17 00:00:00 2001 From: unknown Date: Wed, 23 May 2007 15:22:13 +0400 Subject: [PATCH 2/6] 5.0 version of fix for: Bug #23667 "CREATE TABLE LIKE is not isolated from alteration by other connections" Bug #18950 "CREATE TABLE LIKE does not obtain LOCK_open" As well as: Bug #25578 "CREATE TABLE LIKE does not require any privileges on source table". The first and the second bugs resulted in various errors and wrong binary log order when one tried to execute concurrently CREATE TABLE LIKE statement and DDL statements on source table or DML/DDL statements on its target table. The problem was caused by incomplete protection/table-locking against concurrent statements implemented in mysql_create_like_table() routine. We solve it by simply implementing such protection in proper way (see comment for sql_table.cc for details). The third bug allowed user who didn't have any privileges on table create its copy and therefore circumvent privilege check for SHOW CREATE TABLE. This patch solves this problem by adding privilege check, which was missing. Finally it also removes some duplicated code from mysql_create_like_table(). Note that, altough tests covering concurrency-related aspects of CREATE TABLE LIKE behaviour will only be introduced in 5.1, they were run manually for this patch as well. mysql-test/r/grant2.result: Added test for bug#25578 "CREATE TABLE LIKE does not require any privileges on source table". mysql-test/t/grant2.test: Added test for bug#25578 "CREATE TABLE LIKE does not require any privileges on source table". sql/handler.h: Introduced new flag for HA_CREATE_INFO::options in order to be able to distinguish CREATE TABLE ... LIKE from other types of CREATE TABLE. sql/mysql_priv.h: mysql_create_like_table() now takes source table name not as a Table_ident object but as regular table list element. sql/sql_parse.cc: CREATE TABLE ... LIKE implementation now uses statement's table list for storing information about the source table. We also use flag in LEX::create_info.options for distinguishing it from other types of CREATE TABLE. Finally CREATE TABLE ... LIKE now requires the same privileges on the source tables as SHOW CREATE TABLE. Moved this privilege check to check_show_create_table_access() function. sql/sql_table.cc: mysql_create_like_table(): - Provided proper protection from concurrent statements. This is achieved by keeping name-lock on the source table and holding LOCK_open mutex during whole operation. This gives protection against concurrent DDL on source table. Also holding this mutex makes copying of .frm file, call to ha_create_table() and binlogging atomic against concurrent DML and DDL operations on target table. - Get rid of duplicated code related to source database/table name handling. All these operations are already done in st_select_lex::add_table_to_list(), so we achieve the same effect by including source table into the statement's table list. sql/sql_yacc.yy: Now we use special flag in LEX::create_info::options for distinguishing CREATE TABLE ... LIKE from other types of CREATE TABLE and store name of source table as regular element in statement's table list. --- mysql-test/r/grant2.result | 24 ++++++++++ mysql-test/t/grant2.test | 44 ++++++++++++++++++ sql/handler.h | 1 + sql/mysql_priv.h | 5 +-- sql/sql_parse.cc | 37 ++++++++++++---- sql/sql_table.cc | 91 ++++++++++++++++++-------------------- sql/sql_yacc.yy | 21 ++------- 7 files changed, 146 insertions(+), 77 deletions(-) diff --git a/mysql-test/r/grant2.result b/mysql-test/r/grant2.result index ff9b7bc6f1f..93098e68070 100644 --- a/mysql-test/r/grant2.result +++ b/mysql-test/r/grant2.result @@ -380,3 +380,27 @@ drop function f2; drop table t2; REVOKE ALL PRIVILEGES, GRANT OPTION FROM `a@`@localhost; drop user `a@`@localhost; +drop database if exists mysqltest_1; +drop database if exists mysqltest_2; +drop user mysqltest_u1@localhost; +create database mysqltest_1; +create database mysqltest_2; +grant all on mysqltest_1.* to mysqltest_u1@localhost; +use mysqltest_2; +create table t1 (i int); +show create table mysqltest_2.t1; +ERROR 42000: SELECT command denied to user 'mysqltest_u1'@'localhost' for table 't1' +create table t1 like mysqltest_2.t1; +ERROR 42000: SELECT command denied to user 'mysqltest_u1'@'localhost' for table 't1' +grant select on mysqltest_2.t1 to mysqltest_u1@localhost; +show create table mysqltest_2.t1; +Table Create Table +t1 CREATE TABLE `t1` ( + `i` int(11) default NULL +) ENGINE=MyISAM DEFAULT CHARSET=latin1 +create table t1 like mysqltest_2.t1; +use test; +drop database mysqltest_1; +drop database mysqltest_2; +drop user mysqltest_u1@localhost; +End of 5.0 tests diff --git a/mysql-test/t/grant2.test b/mysql-test/t/grant2.test index d08a9e3f83d..4a3324b1833 100644 --- a/mysql-test/t/grant2.test +++ b/mysql-test/t/grant2.test @@ -513,3 +513,47 @@ disconnect bug13310; connection default; REVOKE ALL PRIVILEGES, GRANT OPTION FROM `a@`@localhost; drop user `a@`@localhost; + + +# +# Bug#25578 "CREATE TABLE LIKE does not require any privileges on source table" +# +--disable_warnings +drop database if exists mysqltest_1; +drop database if exists mysqltest_2; +--enable_warnings +--error 0,ER_CANNOT_USER +drop user mysqltest_u1@localhost; + +create database mysqltest_1; +create database mysqltest_2; +grant all on mysqltest_1.* to mysqltest_u1@localhost; +use mysqltest_2; +create table t1 (i int); + +# Connect as user with all rights on mysqltest_1 but with no rights on mysqltest_2. +connect (user1,localhost,mysqltest_u1,,mysqltest_1); +connection user1; +# As expected error is emitted +--error ER_TABLEACCESS_DENIED_ERROR +show create table mysqltest_2.t1; +# This should emit error as well +--error ER_TABLEACCESS_DENIED_ERROR +create table t1 like mysqltest_2.t1; + +# Now let us check that SELECT privilege on the source is enough +connection default; +grant select on mysqltest_2.t1 to mysqltest_u1@localhost; +connection user1; +show create table mysqltest_2.t1; +create table t1 like mysqltest_2.t1; + +# Clean-up +connection default; +use test; +drop database mysqltest_1; +drop database mysqltest_2; +drop user mysqltest_u1@localhost; + +--echo End of 5.0 tests + diff --git a/sql/handler.h b/sql/handler.h index 9863d541b5f..a59b7a09740 100644 --- a/sql/handler.h +++ b/sql/handler.h @@ -162,6 +162,7 @@ #define HA_LEX_CREATE_TMP_TABLE 1 #define HA_LEX_CREATE_IF_NOT_EXISTS 2 +#define HA_LEX_CREATE_TABLE_LIKE 4 #define HA_OPTION_NO_CHECKSUM (1L << 17) #define HA_OPTION_NO_DELAY_KEY_WRITE (1L << 18) #define HA_MAX_REC_LENGTH 65535 diff --git a/sql/mysql_priv.h b/sql/mysql_priv.h index f03ef487154..3d061c9eb9e 100644 --- a/sql/mysql_priv.h +++ b/sql/mysql_priv.h @@ -816,9 +816,8 @@ bool mysql_alter_table(THD *thd, char *new_db, char *new_name, Alter_info *alter_info, uint order_num, ORDER *order, bool ignore); bool mysql_recreate_table(THD *thd, TABLE_LIST *table_list); -bool mysql_create_like_table(THD *thd, TABLE_LIST *table, - HA_CREATE_INFO *create_info, - Table_ident *src_table); +bool mysql_create_like_table(THD *thd, TABLE_LIST *table, TABLE_LIST *src_table, + HA_CREATE_INFO *create_info); bool mysql_rename_table(enum db_type base, const char *old_db, const char * old_name, diff --git a/sql/sql_parse.cc b/sql/sql_parse.cc index 7e58b36a939..6277a6c0c10 100644 --- a/sql/sql_parse.cc +++ b/sql/sql_parse.cc @@ -75,6 +75,7 @@ static bool check_db_used(THD *thd,TABLE_LIST *tables); static void remove_escape(char *name); static bool append_file_to_dir(THD *thd, const char **filename_ptr, const char *table_name); +static bool check_show_create_table_access(THD *thd, TABLE_LIST *table); const char *any_db="*any*"; // Special symbol for check_access @@ -3080,9 +3081,9 @@ mysql_execute_command(THD *thd) else { /* regular create */ - if (lex->name) - res= mysql_create_like_table(thd, create_table, &create_info, - (Table_ident *)lex->name); + if (lex->create_info.options & HA_LEX_CREATE_TABLE_LIKE) + res= mysql_create_like_table(thd, create_table, select_tables, + &create_info); else { res= mysql_create_table(thd, create_table->db, @@ -3319,11 +3320,7 @@ end_with_restore_list: first_table->skip_temporary= 1; if (check_db_used(thd, all_tables) || - check_access(thd, SELECT_ACL | EXTRA_ACL, first_table->db, - &first_table->grant.privilege, 0, 0, - test(first_table->schema_table))) - goto error; - if (grant_option && check_grant(thd, SELECT_ACL, all_tables, 2, UINT_MAX, 0)) + check_show_create_table_access(thd, first_table)) goto error; res= mysqld_show_create(thd, first_table); break; @@ -7519,6 +7516,25 @@ bool insert_precheck(THD *thd, TABLE_LIST *tables) } +/** + @brief Check privileges for SHOW CREATE TABLE statement. + + @param thd Thread context + @param table Target table + + @retval TRUE Failure + @retval FALSE Success +*/ + +static bool check_show_create_table_access(THD *thd, TABLE_LIST *table) +{ + return check_access(thd, SELECT_ACL | EXTRA_ACL, table->db, + &table->grant.privilege, 0, 0, + test(table->schema_table)) || + grant_option && check_grant(thd, SELECT_ACL, table, 2, UINT_MAX, 0); +} + + /* CREATE TABLE query pre-check @@ -7583,6 +7599,11 @@ bool create_table_precheck(THD *thd, TABLE_LIST *tables, if (tables && check_table_access(thd, SELECT_ACL, tables,0)) goto err; } + else if (lex->create_info.options & HA_LEX_CREATE_TABLE_LIKE) + { + if (check_show_create_table_access(thd, tables)) + goto err; + } error= FALSE; err: diff --git a/sql/sql_table.cc b/sql/sql_table.cc index 079cc0d6456..4a9f6074b59 100644 --- a/sql/sql_table.cc +++ b/sql/sql_table.cc @@ -2718,7 +2718,8 @@ bool mysql_preload_keys(THD* thd, TABLE_LIST* tables) SYNOPSIS mysql_create_like_table() thd Thread object - table Table list (one table only) + table Table list element for target table + src_table Table list element for source table create_info Create info table_ident Src table_ident @@ -2727,61 +2728,52 @@ bool mysql_preload_keys(THD* thd, TABLE_LIST* tables) TRUE error */ -bool mysql_create_like_table(THD* thd, TABLE_LIST* table, - HA_CREATE_INFO *create_info, - Table_ident *table_ident) +bool mysql_create_like_table(THD* thd, TABLE_LIST* table, TABLE_LIST *src_table, + HA_CREATE_INFO *create_info) { TABLE **tmp_table; char src_path[FN_REFLEN], dst_path[FN_REFLEN]; char *db= table->db; char *table_name= table->table_name; - char *src_db; - char *src_table= table_ident->table.str; int err; bool res= TRUE; db_type not_used; - - TABLE_LIST src_tables_list; DBUG_ENTER("mysql_create_like_table"); - DBUG_ASSERT(table_ident->db.str); /* Must be set in the parser */ - src_db= table_ident->db.str; /* - Validate the source table + By taking name-lock on the source table and holding LOCK_open mutex we + ensure that no concurrent DDL operation will mess with this table. Note + that holding only name-lock is not enough for this, because it won't block + other DDL statements that only take name-locks on the table and don't + open it (simple name-locks are not exclusive between each other). + + Unfortunately, simply opening this table is not enough for our purproses, + since in 5.0 ALTER TABLE may change .FRM files on disk even if there are + connections that still have old version of table open. This 'optimization' + was removed in 5.1 so there we open the source table instead of taking + name-lock on it. + + We also have to acquire LOCK_open to make copying of .frm file, call to + ha_create_table() and binlogging atomic against concurrent DML and DDL + operations on the target table. */ - if (table_ident->table.length > NAME_LEN || - (table_ident->table.length && - check_table_name(src_table,table_ident->table.length))) - { - my_error(ER_WRONG_TABLE_NAME, MYF(0), src_table); - DBUG_RETURN(TRUE); - } - if (!src_db || check_db_name(src_db)) - { - my_error(ER_WRONG_DB_NAME, MYF(0), src_db ? src_db : "NULL"); - DBUG_RETURN(-1); - } - - bzero((gptr)&src_tables_list, sizeof(src_tables_list)); - src_tables_list.db= src_db; - src_tables_list.table_name= src_table; - - if (lock_and_wait_for_table_name(thd, &src_tables_list)) + if (lock_and_wait_for_table_name(thd, src_table)) goto err; - if ((tmp_table= find_temporary_table(thd, src_db, src_table))) + pthread_mutex_lock(&LOCK_open); + + if ((tmp_table= find_temporary_table(thd, src_table->db, + src_table->table_name))) strxmov(src_path, (*tmp_table)->s->path, reg_ext, NullS); else { - strxmov(src_path, mysql_data_home, "/", src_db, "/", src_table, - reg_ext, NullS); + strxmov(src_path, mysql_data_home, "/", src_table->db, "/", + src_table->table_name, reg_ext, NullS); /* Resolve symlinks (for windows) */ fn_format(src_path, src_path, "", "", MYF(MY_UNPACK_FILENAME)); - if (lower_case_table_names) - my_casedn_str(files_charset_info, src_path); if (access(src_path, F_OK)) { - my_error(ER_BAD_TABLE_ERROR, MYF(0), src_table); + my_error(ER_BAD_TABLE_ERROR, MYF(0), src_table->table_name); goto err; } } @@ -2791,10 +2783,13 @@ bool mysql_create_like_table(THD* thd, TABLE_LIST* table, */ if (mysql_frm_type(thd, src_path, ¬_used) != FRMTYPE_TABLE) { - my_error(ER_WRONG_OBJECT, MYF(0), src_db, src_table, "BASE TABLE"); + my_error(ER_WRONG_OBJECT, MYF(0), src_table->db, src_table->table_name, + "BASE TABLE"); goto err; } + DBUG_EXECUTE_IF("sleep_create_like_before_check_if_exists", my_sleep(6000000);); + /* Validate the destination table @@ -2810,27 +2805,22 @@ bool mysql_create_like_table(THD* thd, TABLE_LIST* table, } else { - bool exists; strxmov(dst_path, mysql_data_home, "/", db, "/", table_name, reg_ext, NullS); fn_format(dst_path, dst_path, "", "", MYF(MY_UNPACK_FILENAME)); /* - Note that this critical section should actually cover most - of mysql_create_like_table() function. See bugs #18950 and - #23667 for more information. - Also note that starting from 5.1 we obtain name-lock on - target table instead of inspecting table cache for presence + Note that starting from 5.1 we obtain name-lock on target + table instead of inspecting table cache for presence of open placeholders (see comment in mysql_create_table()). */ - pthread_mutex_lock(&LOCK_open); - exists= (table_cache_has_open_placeholder(thd, db, table_name) || - !access(dst_path, F_OK)); - pthread_mutex_unlock(&LOCK_open); - if (exists) + if (table_cache_has_open_placeholder(thd, db, table_name) || + !access(dst_path, F_OK)) goto table_exists; } + DBUG_EXECUTE_IF("sleep_create_like_before_copy", my_sleep(6000000);); + /* Create a new table by copying from source table */ @@ -2843,6 +2833,8 @@ bool mysql_create_like_table(THD* thd, TABLE_LIST* table, goto err; } + DBUG_EXECUTE_IF("sleep_create_like_before_ha_create", my_sleep(6000000);); + /* As mysql_truncate don't work on a new table at this stage of creation, instead create the table directly (for both normal @@ -2867,6 +2859,8 @@ bool mysql_create_like_table(THD* thd, TABLE_LIST* table, goto err; /* purecov: inspected */ } + DBUG_EXECUTE_IF("sleep_create_like_before_binlogging", my_sleep(6000000);); + // Must be written before unlock if (mysql_bin_log.is_open()) { @@ -2891,8 +2885,7 @@ table_exists: my_error(ER_TABLE_EXISTS_ERROR, MYF(0), table_name); err: - pthread_mutex_lock(&LOCK_open); - unlock_table_name(thd, &src_tables_list); + unlock_table_name(thd, src_table); pthread_mutex_unlock(&LOCK_open); DBUG_RETURN(res); } diff --git a/sql/sql_yacc.yy b/sql/sql_yacc.yy index c1da870960b..b970bcaedd6 100644 --- a/sql/sql_yacc.yy +++ b/sql/sql_yacc.yy @@ -1483,7 +1483,6 @@ create: lex->create_info.options=$2 | $4; lex->create_info.db_type= (enum db_type) lex->thd->variables.table_type; lex->create_info.default_table_charset= NULL; - lex->name=0; } create2 { Lex->current_select= &Lex->select_lex; } @@ -2763,27 +2762,15 @@ create2: | opt_create_table_options create3 {} | LIKE table_ident { - LEX *lex=Lex; - THD *thd= lex->thd; - if (!(lex->name= (char *)$2)) + Lex->create_info.options|= HA_LEX_CREATE_TABLE_LIKE; + if (!Lex->select_lex.add_table_to_list(YYTHD, $2, NULL, 0, TL_READ)) MYSQL_YYABORT; - if ($2->db.str == NULL && - thd->copy_db_to(&($2->db.str), &($2->db.length))) - { - MYSQL_YYABORT; - } } | '(' LIKE table_ident ')' { - LEX *lex=Lex; - THD *thd= lex->thd; - if (!(lex->name= (char *)$3)) + Lex->create_info.options|= HA_LEX_CREATE_TABLE_LIKE; + if (!Lex->select_lex.add_table_to_list(YYTHD, $3, NULL, 0, TL_READ)) MYSQL_YYABORT; - if ($3->db.str == NULL && - thd->copy_db_to(&($3->db.str), &($3->db.length))) - { - MYSQL_YYABORT; - } } ; From 1e33b063f07522e3a94cb62357e02d70168d10aa Mon Sep 17 00:00:00 2001 From: unknown Date: Fri, 25 May 2007 14:36:01 -0600 Subject: [PATCH 3/6] Bug#27876 (SF with cyrillic variable name fails during execution (regression)) The root cause of this bug is related to the function skip_rear_comments, in sql_lex.cc Recent code changes in skip_rear_comments changed the prototype from "const uchar*" to "const char*", which had an unforseen impact on this test: (endp[-1] < ' ') With unsigned characters, this code filters bytes of value [0x00 - 0x20] With *signed* characters, this also filters bytes of value [0x80 - 0xFF]. This caused the regression reported, considering cyrillic characters in the parameter name to be whitespace, and truncated. Note that the regression is present both in 5.0 and 5.1. With this fix: - [0x80 - 0xFF] bytes are no longer considered whitespace. This alone fixes the regression. In addition, filtering [0x00 - 0x20] was found bogus and abusive, so that the code now filters uses my_isspace when looking for whitespace. Note that this fix is only addressing the regression affecting UTF-8 in general, but does not address a more fundamental problem with skip_rear_comments: parsing a string *backwards*, starting at end[-1], is not safe with multi-bytes characters, so that end[-1] can confuse the last byte of a multi-byte characters with a characters to filter out. The only known impact of this remaining issue affects objects that have to meet all the conditions below: - the object is a FUNCTION / PROCEDURE / TRIGGER / EVENT / VIEW - the body consist of only *1* instruction, and does *not* contain a BEGIN-END block - the instruction ends, lexically, with * ';'? For example, "select ;" or "return ;" - The last character of is a multi-byte character - the last byte of this character is ';' '*', '/' or whitespace In this case, the body of the object will be truncated after parsing, and stored in an invalid format. This last issue has not been fixed in this patch, since the real fix will be implemented by Bug 25411 (trigger code truncated), which is caused by the very same code. The real problem is that the function skip_rear_comments is only a work-around, and should be removed entirely: see the proposed patch for bug 25411 for details. sql/sp_head.cc: In skip_rear_comments, Filter out only whitespace, not other (non ascii or control) valid characters sql/sql_lex.cc: In skip_rear_comments, Filter out only whitespace, not other (non ascii or control) valid characters sql/sql_lex.h: In skip_rear_comments, Filter out only whitespace, not other (non ascii or control) valid characters sql/sql_view.cc: In skip_rear_comments, Filter out only whitespace, not other (non ascii or control) valid characters tests/mysql_client_test.c: Bug#27876 (SF with cyrillic variable name fails during execution (regression)) --- sql/sp_head.cc | 2 +- sql/sql_lex.cc | 8 +++-- sql/sql_lex.h | 2 +- sql/sql_view.cc | 3 +- tests/mysql_client_test.c | 64 +++++++++++++++++++++++++++++++++++++++ 5 files changed, 73 insertions(+), 6 deletions(-) diff --git a/sql/sp_head.cc b/sql/sp_head.cc index 835d8bf038f..bb742198381 100644 --- a/sql/sp_head.cc +++ b/sql/sp_head.cc @@ -539,7 +539,7 @@ sp_head::init_strings(THD *thd, LEX *lex) Trim "garbage" at the end. This is sometimes needed with the "/ * ! VERSION... * /" wrapper in dump files. */ - endp= skip_rear_comments((char*) m_body_begin, (char*) endp); + endp= skip_rear_comments(thd->charset(), (char*) m_body_begin, (char*) endp); m_body.length= endp - m_body_begin; m_body.str= strmake_root(root, m_body_begin, m_body.length); diff --git a/sql/sql_lex.cc b/sql/sql_lex.cc index 7bcdc499011..2428b2e2330 100644 --- a/sql/sql_lex.cc +++ b/sql/sql_lex.cc @@ -1098,6 +1098,7 @@ Alter_info::Alter_info(const Alter_info &rhs, MEM_ROOT *mem_root) SYNOPSIS skip_rear_comments() + cs character set begin pointer to the beginning of statement end pointer to the end of statement @@ -1108,10 +1109,11 @@ Alter_info::Alter_info(const Alter_info &rhs, MEM_ROOT *mem_root) Pointer to the last non-comment symbol of the statement. */ -char *skip_rear_comments(char *begin, char *end) +char *skip_rear_comments(CHARSET_INFO *cs, char *begin, char *end) { - while (begin < end && (end[-1] <= ' ' || end[-1] == '*' || - end[-1] == '/' || end[-1] == ';')) + while (begin < end && (end[-1] == '*' || + end[-1] == '/' || end[-1] == ';') || + my_isspace(cs, end[-1])) end-= 1; return end; } diff --git a/sql/sql_lex.h b/sql/sql_lex.h index 6c9283126c4..f8405ef14ca 100644 --- a/sql/sql_lex.h +++ b/sql/sql_lex.h @@ -1271,4 +1271,4 @@ extern void lex_free(void); extern void lex_start(THD *thd); extern void lex_end(LEX *lex); extern int MYSQLlex(void *arg, void *yythd); -extern char *skip_rear_comments(char *begin, char *end); +extern char *skip_rear_comments(CHARSET_INFO *cs, char *begin, char *end); diff --git a/sql/sql_view.cc b/sql/sql_view.cc index ba367040b36..bfa799ff289 100644 --- a/sql/sql_view.cc +++ b/sql/sql_view.cc @@ -772,7 +772,8 @@ static int mysql_register_view(THD *thd, TABLE_LIST *view, view->query.str= (char*)str.ptr(); view->query.length= str.length()-1; // we do not need last \0 view->source.str= thd->query + thd->lex->create_view_select_start; - view->source.length= (char *)skip_rear_comments((char *)view->source.str, + view->source.length= (char *)skip_rear_comments(thd->charset(), + (char *)view->source.str, (char *)thd->query + thd->query_length) - view->source.str; diff --git a/tests/mysql_client_test.c b/tests/mysql_client_test.c index 38346ad0dbc..e56dd693287 100644 --- a/tests/mysql_client_test.c +++ b/tests/mysql_client_test.c @@ -15560,6 +15560,69 @@ static void test_bug24179() } +/* + Bug#27876 (SF with cyrillic variable name fails during execution (regression)) +*/ +static void test_bug27876() +{ + int rc; + MYSQL_RES *result; + + char utf8_func[] = + { + 0xd1, 0x84, 0xd1, 0x83, 0xd0, 0xbd, 0xd0, 0xba, + 0xd1, 0x86, 0xd0, 0xb8, 0xd0, 0xb9, 0xd0, 0xba, + 0xd0, 0xb0, + 0x00 + }; + + char utf8_param[] = + { + 0xd0, 0xbf, 0xd0, 0xb0, 0xd1, 0x80, 0xd0, 0xb0, + 0xd0, 0xbc, 0xd0, 0xb5, 0xd1, 0x82, 0xd1, 0x8a, + 0xd1, 0x80, 0x5f, 0xd0, 0xb2, 0xd0, 0xb5, 0xd1, + 0x80, 0xd1, 0x81, 0xd0, 0xb8, 0xd1, 0x8f, + 0x00 + }; + + char query[500]; + + DBUG_ENTER("test_bug27876"); + myheader("test_bug27876"); + + rc= mysql_query(mysql, "set names utf8"); + myquery(rc); + + rc= mysql_query(mysql, "select version()"); + myquery(rc); + result= mysql_store_result(mysql); + mytest(result); + + sprintf(query, "DROP FUNCTION IF EXISTS %s", utf8_func); + rc= mysql_query(mysql, query); + myquery(rc); + + sprintf(query, + "CREATE FUNCTION %s( %s VARCHAR(25))" + " RETURNS VARCHAR(25) DETERMINISTIC RETURN %s", + utf8_func, utf8_param, utf8_param); + rc= mysql_query(mysql, query); + myquery(rc); + sprintf(query, "SELECT %s(VERSION())", utf8_func); + rc= mysql_query(mysql, query); + myquery(rc); + result= mysql_store_result(mysql); + mytest(result); + + sprintf(query, "DROP FUNCTION %s", utf8_func); + rc= mysql_query(mysql, query); + myquery(rc); + + rc= mysql_query(mysql, "set names default"); + myquery(rc); +} + + /* Read and parse arguments and MySQL options from my.cnf */ @@ -15840,6 +15903,7 @@ static struct my_tests_st my_tests[]= { { "test_bug23383", test_bug23383 }, { "test_bug21635", test_bug21635 }, { "test_bug24179", test_bug24179 }, + { "test_bug27876", test_bug27876 }, { 0, 0 } }; From 5ed76763f864f8d0a5a6295e1ba492cd2f1acbf9 Mon Sep 17 00:00:00 2001 From: unknown Date: Fri, 25 May 2007 16:17:20 -0600 Subject: [PATCH 4/6] Code review comments sql/sql_lex.cc: Fixed parenthese typo, found during code review --- sql/sql_lex.cc | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/sql/sql_lex.cc b/sql/sql_lex.cc index 2428b2e2330..cbfba3d4d80 100644 --- a/sql/sql_lex.cc +++ b/sql/sql_lex.cc @@ -1112,8 +1112,8 @@ Alter_info::Alter_info(const Alter_info &rhs, MEM_ROOT *mem_root) char *skip_rear_comments(CHARSET_INFO *cs, char *begin, char *end) { while (begin < end && (end[-1] == '*' || - end[-1] == '/' || end[-1] == ';') || - my_isspace(cs, end[-1])) + end[-1] == '/' || end[-1] == ';' || + my_isspace(cs, end[-1]))) end-= 1; return end; } From 96d16d96d12560b54da550d79ff0017d2976aacc Mon Sep 17 00:00:00 2001 From: unknown Date: Mon, 28 May 2007 13:50:33 +0200 Subject: [PATCH 5/6] Bug#24988 FLUSH PRIVILEGES causes brief unavailability - A race condition caused brief unavailablility when trying to acccess a table. - The unprotected variable 'grant_option' wasn't intended to alternate during normal execution. Variable initialization moved to grant_init a lines responsible for the alternation are removed. sql/mysqld.cc: - Added documentation to describe grant_option flag. sql/sql_acl.cc: - This patch removes lines which causes grant_option to alternate and moves variable initialization to the grant_init()-function. --- sql/mysqld.cc | 10 +++++++++- sql/sql_acl.cc | 11 ++++------- 2 files changed, 13 insertions(+), 8 deletions(-) diff --git a/sql/mysqld.cc b/sql/mysqld.cc index e5abef25b62..2253e67a1d7 100644 --- a/sql/mysqld.cc +++ b/sql/mysqld.cc @@ -346,7 +346,15 @@ bool opt_endinfo, using_udf_functions; my_bool locked_in_memory; bool opt_using_transactions, using_update_log; bool volatile abort_loop; -bool volatile shutdown_in_progress, grant_option; +bool volatile shutdown_in_progress; +/** + @brief 'grant_option' is used to indicate if privileges needs + to be checked, in which case the lock, LOCK_grant, is used + to protect access to the grant table. + @note This flag is dropped in 5.1 + @see grant_init() + */ +bool volatile grant_option; my_bool opt_skip_slave_start = 0; // If set, slave is not autostarted my_bool opt_reckless_slave = 0; diff --git a/sql/sql_acl.cc b/sql/sql_acl.cc index ebf9385d177..ba6d03d6063 100644 --- a/sql/sql_acl.cc +++ b/sql/sql_acl.cc @@ -2995,7 +2995,7 @@ bool mysql_table_grant(THD *thd, TABLE_LIST *table_list, } } } - grant_option=TRUE; + thd->mem_root= old_root; pthread_mutex_unlock(&acl_cache->lock); @@ -3162,7 +3162,7 @@ bool mysql_routine_grant(THD *thd, TABLE_LIST *table_list, bool is_proc, continue; } } - grant_option=TRUE; + thd->mem_root= old_root; pthread_mutex_unlock(&acl_cache->lock); if (!result && !no_error) @@ -3338,6 +3338,8 @@ my_bool grant_init() delete thd; /* Remember that we don't have a THD */ my_pthread_setspecific_ptr(THR_THD, 0); + /* Set the grant option flag so we will check grants */ + grant_option= TRUE; DBUG_RETURN(return_val); } @@ -3367,7 +3369,6 @@ static my_bool grant_load(TABLE_LIST *tables) THR_MALLOC); DBUG_ENTER("grant_load"); - grant_option = FALSE; (void) hash_init(&column_priv_hash,system_charset_info, 0,0,0, (hash_get_key) get_grant_table, (hash_free_key) free_grant_table,0); @@ -3478,7 +3479,6 @@ static my_bool grant_load(TABLE_LIST *tables) } while (!p_table->file->index_next(p_table->record[0])); } - grant_option= TRUE; return_val=0; // Return ok end_unlock: @@ -3511,7 +3511,6 @@ my_bool grant_reload(THD *thd) { TABLE_LIST tables[3]; HASH old_column_priv_hash, old_proc_priv_hash, old_func_priv_hash; - bool old_grant_option; MEM_ROOT old_mem; my_bool return_val= 1; DBUG_ENTER("grant_reload"); @@ -3541,7 +3540,6 @@ my_bool grant_reload(THD *thd) old_column_priv_hash= column_priv_hash; old_proc_priv_hash= proc_priv_hash; old_func_priv_hash= func_priv_hash; - old_grant_option= grant_option; old_mem= memex; if ((return_val= grant_load(tables))) @@ -3551,7 +3549,6 @@ my_bool grant_reload(THD *thd) column_priv_hash= old_column_priv_hash; /* purecov: deadcode */ proc_priv_hash= old_proc_priv_hash; func_priv_hash= old_func_priv_hash; - grant_option= old_grant_option; /* purecov: deadcode */ memex= old_mem; /* purecov: deadcode */ } else From 9f15fe64bd966fe7dd4e3d412934ebd94659dc09 Mon Sep 17 00:00:00 2001 From: unknown Date: Wed, 30 May 2007 11:53:50 +0400 Subject: [PATCH 6/6] Disable IM-tests. --- mysql-test/t/disabled.def | 3 +++ 1 file changed, 3 insertions(+) diff --git a/mysql-test/t/disabled.def b/mysql-test/t/disabled.def index 85685234de9..a0d05e4be2a 100644 --- a/mysql-test/t/disabled.def +++ b/mysql-test/t/disabled.def @@ -14,3 +14,6 @@ ndb_load : Bug#17233 user_limits : Bug#23921 random failure of user_limits.test im_life_cycle : Bug#27851: Instance manager test im_life_cycle fails randomly im_daemon_life_cycle : Bug#20294: Instance manager tests fail randomly +im_options_set : Bug#20294: Instance manager tests fail randomly +im_options_unset : Bug#20294: Instance manager tests fail randomly +im_utils : Bug#20294: Instance manager tests fail randomly