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fixed

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BUG #2397 "RENAME TABLES is not blocked by FLUSH TABLES WITH READ LOCK"
(added waiting for global_read_lock in mysql_rename_tables)
This commit is contained in:
vva@eagle.mysql.r18.ru 2004-04-01 22:47:09 +05:00
parent 3bfbe6e0dd
commit 7a580ce991
3 changed files with 41 additions and 0 deletions
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14
mysql-test/r/rename.result
View file

@ -39,3 +39,17 @@ select * from t3;
drop table if exists t1,t2,t3,t4;
Warnings:
Note 1051 Unknown table 't4'
CREATE TABLE t1 (a int);
CREATE TABLE t3 (a int);
FLUSH TABLES WITH READ LOCK;
RENAME TABLE t1 TO t2, t3 to t4;
show tables;
Tables_in_test
t1
t3
UNLOCK TABLES;
show tables;
Tables_in_test
t2
t4
drop table t2, t4;

24
mysql-test/t/rename.test
View file

@ -35,3 +35,27 @@ select * from t3;
# This should give a warning for t4
drop table if exists t1,t2,t3,t4;
#
# Test-case for Bug #2397 RENAME TABLES is not blocked by
# FLUSH TABLES WITH READ LOCK
#
connect (con1,localhost,root,,);
connect (con2,localhost,root,,);
connection con1;
CREATE TABLE t1 (a int);
CREATE TABLE t3 (a int);
connection con2;
FLUSH TABLES WITH READ LOCK;
connection con1;
send RENAME TABLE t1 TO t2, t3 to t4;
connection con2;
sleep 1;
show tables;
UNLOCK TABLES;
sleep 1;
show tables;
drop table t2, t4;

3
sql/sql_rename.cc
View file

@ -46,6 +46,8 @@ bool mysql_rename_tables(THD *thd, TABLE_LIST *table_list)
DBUG_RETURN(1);
}
if (wait_if_global_read_lock(thd,0))
DBUG_RETURN(1);
VOID(pthread_mutex_lock(&LOCK_open));
if (lock_table_names(thd, table_list))
goto err;
@ -93,6 +95,7 @@ bool mysql_rename_tables(THD *thd, TABLE_LIST *table_list)
err:
pthread_mutex_unlock(&LOCK_open);
start_waiting_global_read_lock(thd);
DBUG_RETURN(error);
}