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Diffstat (limited to 'mysql-test/t/flush.test')
| -rw-r--r-- | mysql-test/t/flush.test | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/mysql-test/t/flush.test b/mysql-test/t/flush.test index de23cf02c38..037e2fcaa73 100644 --- a/mysql-test/t/flush.test +++ b/mysql-test/t/flush.test @@ -668,3 +668,36 @@ ALTER TABLE t1 COMMENT 'test'; UNLOCK TABLES; DROP TABLE t1; + + +--echo # +--echo # Test for bug #12641342 - "61401: UPDATE PERFORMANCE DEGRADES +--echo # GRADUALLY IF A TRIGGER EXISTS". +--echo # +--echo # One of side-effects of this bug was that a transaction which +--echo # involved DML statements requiring prelocking blocked concurrent +--echo # FLUSH TABLES WITH READ LOCK for the whole its duration, while +--echo # correct behavior in this case is to block FTWRL only for duration +--echo # of individual DML statements. +--disable_warnings +DROP TABLE IF EXISTS t1; +--enable_warnings +CREATE TABLE t1 (id INT PRIMARY KEY, value INT); +INSERT INTO t1 VALUES (1, 1); +CREATE TRIGGER t1_au AFTER UPDATE ON t1 FOR EACH ROW SET @var = "a"; +BEGIN; +UPDATE t1 SET value= value + 1 WHERE id = 1; + +--echo # Switching to connection 'con1'. +connect(con1, localhost, root); +--echo # The below FLUSH TABLES WITH READ LOCK should succeed and +--echo # should not be blocked by the transaction in default connection. +FLUSH TABLES WITH READ LOCK; +UNLOCK TABLES; +disconnect con1; +--source include/wait_until_disconnected.inc + +--echo # Switching to connection 'default'. +connection default; +COMMIT; +DROP TABLE t1; |