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synced 2025-08-12 13:31:36 +02:00
bead24b7f3
Remove one of the major sources of race condiitons in mariadb-test. Normally, mariadb_close() sends COM_QUIT to the server and immediately disconnects. In mariadb-test it means the test can switch to another connection and sends queries to the server before the server even started parsing the COM_QUIT packet and these queries can see the connection as fully active, as it didn't reach dispatch_command yet. This is a major source of instability in tests and many - but not all, still less than a half - tests employ workarounds. The correct one is a pair count_sessions.inc/wait_until_count_sessions.inc. Also very popular was wait_until_disconnected.inc, which was completely useless, because it verifies that the connection is closed, and after disconnect it always is, it didn't verify whether the server processed COM_QUIT. Sadly the placebo was as widely used as the real thing. Let's fix this by making mariadb-test `disconnect` command _to wait_ for the server to confirm. This makes almost all workarounds redundant. In some cases count_sessions.inc/wait_until_count_sessions.inc is still needed, though, as only `disconnect` command is changed: * after external tools, like `exec $MYSQL` * after failed `connect` command * replication, after `STOP SLAVE` * Federated/CONNECT/SPIDER/etc after `DROP TABLE` and also in some XA tests, because an XA transaction is dissociated from the THD very late, after the server has closed the client connection. Collateral cleanups: fix comments, remove some redundant statements: * DROP IF EXISTS if nothing is known to exist * DROP table/view before DROP DATABASE * REVOKE privileges before DROP USER etc
421 lines
9.9 KiB
Text
421 lines
9.9 KiB
Text
--source include/have_innodb.inc
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# Tests will be skipped for the view protocol because the view protocol creates
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# an additional util connection and other statistics data
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-- source include/no_view_protocol.inc
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# MDEV-254: Server hang with FLUSH TABLES WITH READ LOCK AND DISABLE CHECKPOINT
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FLUSH TABLES WITH READ LOCK AND DISABLE CHECKPOINT;
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UNLOCK TABLES;
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CREATE TABLE t1 ( m MEDIUMTEXT ) ENGINE=InnoDB;
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INSERT INTO t1 VALUES ( REPEAT('i',65535) );
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DROP TABLE t1;
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--echo
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--echo #
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--echo # WL#6168: FLUSH TABLES ... FOR EXPORT -- parser
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--echo #
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--echo
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--echo # new "EXPORT" keyword is a valid user variable name:
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SET @export = 10;
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--echo # new "EXPORT" keyword is a valid SP parameter name:
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CREATE PROCEDURE p1(export INT) BEGIN END;
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DROP PROCEDURE p1;
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--echo # new "EXPORT" keyword is a valid local variable name:
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DELIMITER |;
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CREATE PROCEDURE p1()
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BEGIN
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DECLARE export INT;
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END|
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DELIMITER ;|
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DROP PROCEDURE p1;
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--echo # new "EXPORT" keyword is a valid SP name:
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CREATE PROCEDURE export() BEGIN END;
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DROP PROCEDURE export;
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--echo # new FLUSH TABLES ... FOR EXPORT syntax:
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--error ER_PARSE_ERROR
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FLUSH TABLES FOR EXPORT;
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--error ER_PARSE_ERROR
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FLUSH TABLES WITH EXPORT;
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CREATE TABLE t1 (i INT) engine=InnoDB;
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CREATE TABLE t2 LIKE t1;
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--error ER_PARSE_ERROR
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FLUSH TABLES t1,t2 WITH EXPORT;
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FLUSH TABLES t1, t2 FOR EXPORT;
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UNLOCK TABLES;
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--echo # case check
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FLUSH TABLES t1, t2 for ExPoRt;
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UNLOCK TABLES;
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--echo # With LOCAL keyword
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FLUSH LOCAL TABLES t1, t2 FOR EXPORT;
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UNLOCK TABLES;
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--echo # Tables with fully qualified names
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FLUSH LOCAL TABLES test.t1, test.t2 for ExPoRt;
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UNLOCK TABLES;
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DROP TABLES t1, t2;
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--echo # new "EXPORT" keyword is a valid table name:
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CREATE TABLE export (i INT) engine=InnoDB;
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--echo # it's ok to lock the "export" table for export:
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FLUSH TABLE export FOR EXPORT;
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UNLOCK TABLES;
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DROP TABLE export;
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--echo #
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--echo # WL#6169 FLUSH TABLES ... FOR EXPORT -- runtime
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--echo #
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--echo # Test 1: Views, temporary tables, non-existent tables
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--echo #
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CREATE VIEW v1 AS SELECT 1;
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CREATE TEMPORARY TABLE t1 (a INT);
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FLUSH TABLES v1 FOR EXPORT;
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UNLOCK TABLES;
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--error ER_NO_SUCH_TABLE
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FLUSH TABLES t1 FOR EXPORT;
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--error ER_NO_SUCH_TABLE
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FLUSH TABLES non_existent FOR EXPORT;
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DROP TEMPORARY TABLE t1;
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DROP VIEW v1;
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--echo # Test 2: Blocked by update transactions, blocks updates.
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--echo #
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CREATE TABLE t1 (a INT PRIMARY KEY, b INT) engine= InnoDB;
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CREATE TABLE t2 (a INT) engine= InnoDB;
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--connect (con1, localhost, root)
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START TRANSACTION;
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INSERT INTO t1 VALUES (1, 1);
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--connection default
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--echo # Should be blocked
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--echo # Sending:
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--send FLUSH TABLES t1 FOR EXPORT
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--connection con1
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let $wait_condition=
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SELECT COUNT(*) = 1 FROM information_schema.processlist
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WHERE state = "Waiting for table metadata lock" AND
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info = "FLUSH TABLES t1 FOR EXPORT";
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--source include/wait_condition.inc
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COMMIT;
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--connection default
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--echo # Reaping: FLUSH TABLES t1 FOR EXPORT
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--reap
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--connection con1
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--echo # Should not be blocked
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INSERT INTO t2 VALUES (1);
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--echo # Should be blocked
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--echo # Sending:
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--send INSERT INTO t1 VALUES (2, 2)
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--connection default
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let $wait_condition=
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SELECT COUNT(*) = 1 FROM information_schema.processlist
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WHERE state = "Waiting for table metadata lock" AND
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info = "INSERT INTO t1 VALUES (2, 2)";
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--source include/wait_condition.inc
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UNLOCK TABLES;
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--connection con1
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--echo # Reaping: INSERT INTO t1 VALUES (2, 2);
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--reap
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--echo # Test 3: Read operations should not be affected.
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--echo #
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START TRANSACTION;
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SELECT * FROM t1;
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--connection default
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--echo # Should not be blocked
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FLUSH TABLES t1 FOR EXPORT;
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--connection con1
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COMMIT;
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--echo # Should not be blocked
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SELECT * FROM t1;
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--connection default
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UNLOCK TABLES;
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--echo # Test 4: Blocked by DDL, blocks DDL.
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--echo #
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START TRANSACTION;
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SELECT * FROM t1;
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--connect (con2, localhost, root)
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--echo # Sending:
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--send ALTER TABLE t1 ADD INDEX i1(b)
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--connection con1
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let $wait_condition=
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SELECT COUNT(*) = 1 FROM information_schema.processlist
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WHERE state = "Waiting for table metadata lock" AND
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info = "ALTER TABLE t1 ADD INDEX i1(b)";
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--source include/wait_condition.inc
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--echo # Should be blocked
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--send FLUSH TABLE t1 FOR EXPORT
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--connection default
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let $wait_condition=
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SELECT COUNT(*) = 1 FROM information_schema.processlist
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WHERE state = "Waiting for table metadata lock" AND
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info = "FLUSH TABLE t1 FOR EXPORT";
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--source include/wait_condition.inc
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COMMIT;
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--connection con2
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--echo # Reaping ALTER TABLE ...
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--reap
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--connection con1
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--echo # Reaping FLUSH TABLE t1 FOR EXPORT
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--reap
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UNLOCK TABLES;
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--connection default
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FLUSH TABLE t1 FOR EXPORT;
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--connection con2
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--echo # Should be blocked
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--send DROP TABLE t1
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--connection default
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let $wait_condition=
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SELECT COUNT(*) = 1 FROM information_schema.processlist
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WHERE state = "Waiting for table metadata lock" AND
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info = "DROP TABLE t1";
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--source include/wait_condition.inc
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UNLOCK TABLES;
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--connection con2
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--echo # Reaping DROP TABLE t1
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--reap
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--disconnect con2
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--connection default
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DROP TABLE t2;
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--echo # Test 5: Compatibilty with FLUSH TABLES WITH READ LOCK
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--echo #
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CREATE TABLE t1(a INT) engine= InnoDB;
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FLUSH TABLES WITH READ LOCK;
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--connection con1
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--echo # This should not block
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FLUSH TABLE t1 FOR EXPORT;
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UNLOCK TABLES;
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--connection default
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UNLOCK TABLES;
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DROP TABLE t1;
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--echo # Test 6: Unsupported storage engines.
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--echo #
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CREATE TABLE t1(a INT) engine= MEMORY;
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--error ER_ILLEGAL_HA
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FLUSH TABLE t1 FOR EXPORT;
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DROP TABLE t1;
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--disconnect con1
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--connection default
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--echo # Test 7: Check privileges required.
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--echo # in flush-innodb-notembedded.test
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--echo # Test 8: FLUSH TABLE <table_list> FOR EXPORT is incompatible
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--echo # with itself (to avoid race conditions in metadata
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--echo # file handling).
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--echo #
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CREATE TABLE t1 (a INT) engine= InnoDB;
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CREATE TABLE t2 (a INT) engine= InnoDB;
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--connect (con1, localhost, root)
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FLUSH TABLE t1 FOR EXPORT;
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--connection default
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--echo # This should not block
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FLUSH TABLE t2 FOR EXPORT;
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UNLOCK TABLES;
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--echo # This should block
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--echo # Sending:
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--send FLUSH TABLE t1 FOR EXPORT
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--connection con1
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let $wait_condition=
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SELECT COUNT(*) = 1 FROM information_schema.processlist
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WHERE state = "Waiting for table metadata lock" AND
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info = "FLUSH TABLE t1 FOR EXPORT";
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--source include/wait_condition.inc
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UNLOCK TABLES;
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--connection default
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--echo # Reaping: FLUSH TABLE t1 FOR EXPORT
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--reap
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UNLOCK TABLES;
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--echo # Test 9: LOCK TABLES ... READ is not affected
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--echo #
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LOCK TABLE t1 READ;
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--connection con1
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--echo # Should not block
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FLUSH TABLE t1 FOR EXPORT;
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UNLOCK TABLES;
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--connection default
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UNLOCK TABLES;
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FLUSH TABLE t1 FOR EXPORT;
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--connection con1
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--echo # Should not block
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LOCK TABLE t1 READ;
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UNLOCK TABLES;
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--connection default
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UNLOCK TABLES;
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--disconnect con1
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--connection default
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DROP TABLE t1, t2;
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--echo # Test 10: Lock is released if transaction is started after doing
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--echo # 'flush table..' in same session
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CREATE TABLE t1 ( i INT ) ENGINE = Innodb;
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FLUSH TABLE t1 FOR EXPORT;
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--echo # error as active locks already exist
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--error ER_LOCK_OR_ACTIVE_TRANSACTION
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FLUSH TABLE t1 FOR EXPORT;
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--echo # active locks will be released due to start transaction
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START TRANSACTION;
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--echo # passes as start transaction released ealier locks
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FLUSH TABLE t1 FOR EXPORT;
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UNLOCK TABLES;
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DROP TABLE t1;
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--echo # Test 11: Test 'flush table with fully qualified table names
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--echo # and with syntax local/NO_WRITE_TO_BINLOG
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--connect (con1, localhost, root)
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--connection default
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CREATE TABLE t1 ( i INT ) ENGINE = Innodb;
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INSERT INTO t1 VALUES (100),(200);
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FLUSH LOCAL TABLES test.t1 FOR EXPORT;
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--connection con1
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--echo # Should be blocked
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--echo # Sending:
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--send FLUSH LOCAL TABLES t1 FOR EXPORT
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--connection default
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let $wait_condition=
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SELECT COUNT(*) = 1 FROM information_schema.processlist
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WHERE state = "Waiting for table metadata lock" AND
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info = "FLUSH LOCAL TABLES t1 FOR EXPORT";
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--source include/wait_condition.inc
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UNLOCK TABLE;
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--connection con1
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--echo # Reaping: FLUSH LOCAL TABLES t1 FOR EXPORT
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--reap
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SELECT * FROM t1 ORDER BY i;
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--connection default
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--echo # Should be blocked
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--echo # Sending:
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--send FLUSH NO_WRITE_TO_BINLOG TABLES test.t1 FOR EXPORT
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--connection con1
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let $wait_condition=
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SELECT COUNT(*) = 1 FROM information_schema.processlist
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WHERE state = "Waiting for table metadata lock" AND
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info = "FLUSH NO_WRITE_TO_BINLOG TABLES test.t1 FOR EXPORT";
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--source include/wait_condition.inc
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UNLOCK TABLES;
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--connection default
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--echo # Reaping: FLUSH NO_WRITE_TO_BINLOG TABLES test.t1 FOR EXPORT
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--reap
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SELECT * FROM t1 ORDER BY i;
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UNLOCK TABLE;
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DROP TABLE t1;
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--echo # Test 12: Active transaction get committed if user execute
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--echo # "FLUSH TABLE ... FOR EXPORT" or "LOCK TABLE.."
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--connection default
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CREATE TABLE t1 ( i INT ) ENGINE = Innodb;
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INSERT INTO t1 VALUES (100),(200);
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START TRANSACTION;
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INSERT INTO t1 VALUES (300);
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--echo # 'flush table..' commit active transaction from same session
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FLUSH LOCAL TABLES test.t1 FOR EXPORT;
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ROLLBACK;
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SELECT * FROM t1 ORDER BY i;
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START TRANSACTION;
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INSERT INTO t1 VALUES (400);
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--echo # 'lock table ..' commit active transaction from same session
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LOCK TABLES test.t1 READ;
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ROLLBACK;
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SELECT * FROM t1 ORDER BY i;
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UNLOCK TABLES;
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DROP TABLE t1;
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--echo # Test 13: Verify "FLUSH TABLE ... FOR EXPORT" and "LOCK TABLE.."
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--echo # in same session
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--connection default
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CREATE TABLE t1 ( i INT ) ENGINE = Innodb;
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--echo # Lock table
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LOCK TABLES test.t1 WRITE;
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--echo # 'lock table ..' completes even if table lock is acquired
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--echo # in same session using 'lock table'. Previous locks are released.
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LOCK TABLES test.t1 READ;
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--echo # 'flush table ..' gives error if table lock is acquired
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--echo # in same session using 'lock table ..'
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--error ER_LOCK_OR_ACTIVE_TRANSACTION
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FLUSH TABLES test.t1 FOR EXPORT;
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--echo # 'lock table ..' completes even if table lock is acquired
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--echo # in same session using 'flush table'. Previous locks are released.
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LOCK TABLES test.t1 WRITE;
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UNLOCK TABLES;
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DROP TABLE t1;
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--disconnect con1
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--connection default
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--echo # End of 5.6 tests
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