mariadb/mysql-test/suite/innodb/t/update_time.test
Marko Mäkelä 6a3fbfdb2d MDEV-14804 innodb.update_time occasionally fails
Let simplify the test.
The update_time is stored in the table metadata (dict_table_t);
it has nothing to do with buffer pool page eviction or replacement.
2022-08-01 15:15:06 +03:00

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###################################################################
-- echo #
-- echo # Test that INFORMATION_SCHEMA.TABLES.UPDATE_TIME is filled
-- echo # correctly for InnoDB tables.
-- echo #
-- source include/have_innodb.inc
# restart does not work with embedded
-- source include/not_embedded.inc
CREATE TABLE t (a INT) ENGINE=INNODB STATS_PERSISTENT=0;
SELECT update_time FROM information_schema.tables WHERE table_name = 't';
INSERT INTO t VALUES (1);
SELECT COUNT(*) FROM information_schema.tables WHERE table_name = 't'
AND update_time IS NOT NULL;
-- echo # We cant deterministically check that the saved value is correct, but
-- echo # at least we check that it is a timestamp not older than 2 minutes.
-- echo # Usually update_time and NOW() are equal below, but on heavily loaded
-- echo # machines NOW() could be younger.
SELECT COUNT(*) FROM information_schema.tables WHERE table_name = 't'
AND TIMESTAMPDIFF(SECOND, update_time, NOW()) < 120;
-- echo # Test the behavior after restart with a prepared XA transaction
XA START 'xatrx';
DELETE FROM t;
XA END 'xatrx';
XA PREPARE 'xatrx';
CONNECT (con1,localhost,root,,);
call mtr.add_suppression("Found 1 prepared XA transactions");
FLUSH TABLES;
--let $shutdown_timeout=0
--source include/restart_mysqld.inc
SELECT update_time FROM information_schema.tables WHERE table_name = 't';
XA COMMIT 'xatrx';
SELECT COUNT(update_time) FROM information_schema.tables WHERE table_name='t';
DROP TABLE t;