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Backport of revno: 2617.68.9

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Bug #43272 HANDLER SQL command does not work under LOCK TABLES

HANDLER commands are now explicitly disallowed in LOCK TABLES mode.

Before, HANDLER OPEN gave the misleading error message: "Table x was 
not locked with LOCK TABLES". This patch changes HANDLER OPEN/READ/CLOSE 
to give ER_LOCK_OR_ACTIVE_TRANSACTION "Can't execute the given command 
because you have active locked tables or an active transaction" in
LOCK TABLES mode.

Test case added to lock.test.
This commit is contained in:
Jon Olav Hauglid 2009-12-08 15:56:06 +01:00
parent f28f985922
commit 9e1cb3fe1b
3 changed files with 55 additions and 0 deletions
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15
mysql-test/r/lock.result
View File

@ -319,6 +319,21 @@ alter table t1 add column j int;
unlock tables;
drop table t1;
#
# Bug #43272 HANDLER SQL command does not work under LOCK TABLES
#
DROP TABLE IF EXISTS t1;
CREATE TABLE t1 (a INT);
LOCK TABLE t1 WRITE;
# HANDLER commands are not allowed in LOCK TABLES mode
HANDLER t1 OPEN;
ERROR HY000: Can't execute the given command because you have active locked tables or an active transaction
HANDLER t1 READ FIRST;
ERROR HY000: Can't execute the given command because you have active locked tables or an active transaction
HANDLER t1 CLOSE;
ERROR HY000: Can't execute the given command because you have active locked tables or an active transaction
UNLOCK TABLES;
DROP TABLE t1;
#
# Bug#45066 FLUSH TABLES WITH READ LOCK deadlocks against
# LOCK TABLE
#

24
mysql-test/t/lock.test
View File

@ -385,6 +385,30 @@ alter table t1 add column j int;
unlock tables;
drop table t1;
--echo #
--echo # Bug #43272 HANDLER SQL command does not work under LOCK TABLES
--echo #
--disable_warnings
DROP TABLE IF EXISTS t1;
--enable_warnings
CREATE TABLE t1 (a INT);
LOCK TABLE t1 WRITE;
--echo # HANDLER commands are not allowed in LOCK TABLES mode
--error ER_LOCK_OR_ACTIVE_TRANSACTION
HANDLER t1 OPEN;
--error ER_LOCK_OR_ACTIVE_TRANSACTION
HANDLER t1 READ FIRST;
--error ER_LOCK_OR_ACTIVE_TRANSACTION
HANDLER t1 CLOSE;
UNLOCK TABLES;
DROP TABLE t1;
--echo #
--echo # Bug#45066 FLUSH TABLES WITH READ LOCK deadlocks against
--echo # LOCK TABLE

16
sql/sql_handler.cc
View File

@ -201,6 +201,11 @@ bool mysql_ha_open(THD *thd, TABLE_LIST *tables, bool reopen)
tables->db, tables->table_name, tables->alias,
(int) reopen));
if (thd->locked_tables_mode)
{
my_error(ER_LOCK_OR_ACTIVE_TRANSACTION, MYF(0));
DBUG_RETURN(TRUE);
}
if (tables->schema_table)
{
my_error(ER_WRONG_USAGE, MYF(0), "HANDLER OPEN",
@ -386,6 +391,11 @@ bool mysql_ha_close(THD *thd, TABLE_LIST *tables)
DBUG_PRINT("enter",("'%s'.'%s' as '%s'",
tables->db, tables->table_name, tables->alias));
if (thd->locked_tables_mode)
{
my_error(ER_LOCK_OR_ACTIVE_TRANSACTION, MYF(0));
DBUG_RETURN(TRUE);
}
if ((hash_tables= (TABLE_LIST*) my_hash_search(&thd->handler_tables_hash,
(uchar*) tables->alias,
strlen(tables->alias) + 1)))
@ -448,6 +458,12 @@ bool mysql_ha_read(THD *thd, TABLE_LIST *tables,
DBUG_PRINT("enter",("'%s'.'%s' as '%s'",
tables->db, tables->table_name, tables->alias));
if (thd->locked_tables_mode)
{
my_error(ER_LOCK_OR_ACTIVE_TRANSACTION, MYF(0));
DBUG_RETURN(TRUE);
}
thd->lex->select_lex.context.resolve_in_table_list_only(tables);
list.push_front(new Item_field(&thd->lex->select_lex.context,
NULL, NULL, "*"));