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Bug#23588 SHOW COLUMNS on a temporary table causes locking issues

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skip lock_type update for temporary tables
This commit is contained in:
gluh@mysql.com/mgluh.(none) 2008-02-22 12:30:17 +04:00
parent 652b7099ca
commit 4f0873c04b
3 changed files with 28 additions and 2 deletions
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9
mysql-test/r/tablelock.result
View File

@ -46,3 +46,12 @@ CREATE TABLE t2 (a int);
lock tables t1 write,t1 as b write, t2 write, t2 as c read;
drop table t2,t1;
unlock tables;
create temporary table t1(f1 int);
lock tables t1 write;
insert into t1 values (1);
show columns from t1;
Field Type Null Key Default Extra
f1 int(11) YES NULL
insert into t1 values(2);
drop table t1;
unlock tables;

13
mysql-test/t/tablelock.test
View File

@ -49,3 +49,16 @@ drop table t2,t1;
unlock tables;
# End of 4.1 tests
#
# Bug#23588 SHOW COLUMNS on a temporary table causes locking issues
#
create temporary table t1(f1 int);
lock tables t1 write;
insert into t1 values (1);
show columns from t1;
insert into t1 values(2);
drop table t1;
unlock tables;
# End of 5.0 tests

8
sql/sql_base.cc
View File

@ -2852,8 +2852,12 @@ int open_tables(THD *thd, TABLE_LIST **start, uint *counter, uint flags)
}
if (tables->lock_type != TL_UNLOCK && ! thd->locked_tables)
tables->table->reginfo.lock_type= tables->lock_type == TL_WRITE_DEFAULT ?
thd->update_lock_default : tables->lock_type;
{
if (tables->lock_type == TL_WRITE_DEFAULT)
tables->table->reginfo.lock_type= thd->update_lock_default;
else if (tables->table->s->tmp_table == NO_TMP_TABLE)
tables->table->reginfo.lock_type= tables->lock_type;
}
tables->table->grant= tables->grant;
process_view_routines: