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Merge mysql.com:/home/mydev/mysql-5.0-bug19815

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into  mysql.com:/home/mydev/mysql-5.1-bug19815
This commit is contained in:
ingo@mysql.com
2006-05-29 15:30:13 +02:00
parent eddfcc147c d00441e328
commit ed2e475548
3 changed files with 89 additions and 14 deletions
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35
mysql-test/t/lock_multi.test
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@@ -126,3 +126,38 @@ show columns from t1;
connection locker;
unlock tables;
drop table t1;
#
# Bug#19815 - CREATE/RENAME/DROP DATABASE can deadlock on a global read lock
#
connect (con1,localhost,root,,);
connect (con2,localhost,root,,);
#
connection con1;
CREATE DATABASE mysqltest_1;
FLUSH TABLES WITH READ LOCK;
#
# With bug in place: acquire LOCK_mysql_create_table and
# wait in wait_if_global_read_lock().
connection con2;
send DROP DATABASE mysqltest_1;
--sleep 1
#
# With bug in place: try to acquire LOCK_mysql_create_table...
# When fixed: Reject dropping db because of the read lock.
connection con1;
--error ER_CANT_UPDATE_WITH_READLOCK
DROP DATABASE mysqltest_1;
UNLOCK TABLES;
#
connection con2;
reap;
#
connection default;
disconnect con1;
disconnect con2;
# This must have been dropped by connection 2 already,
# which waited until the global read lock was released.
--error ER_DB_DROP_EXISTS
DROP DATABASE mysqltest_1;