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|
--echo # WL#8017 Infrastructure for Optimizer Hints
--echo # MAX_EXECUTION_TIME hint testing
--source include/have_statement_timeout.inc
--echo # MAX_EXECUTION_TIME hint testing
CREATE TABLE t1 (a INT, b VARCHAR(300));
INSERT INTO t1 VALUES (1, 'string');
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT * FROM t1;
INSERT INTO t1 SELECT * FROM t1;
-- disable_query_log
-- disable_result_log
analyze table t1;
-- enable_result_log
-- enable_query_log
--error ER_QUERY_TIMEOUT
SELECT /*+ MAX_EXECUTION_TIME(1) */ * FROM t1 a, t1 b;
EXPLAIN SELECT /*+ MAX_EXECUTION_TIME(10) MAX_EXECUTION_TIME(100) */ * FROM t1;
DROP TABLE t1;
--echo
--echo # test the MAX_EXECUTION_TIME hint for SELECT statements:
--echo
CREATE TABLE t1 (i INT, j INT);
CREATE INDEX i1 ON t1(i);
CREATE INDEX i2 ON t1(j);
INSERT INTO t1 VALUES (1, 1), (2, 2);
SELECT /*+ MAX_EXECUTION_TIME(4294967296) */ 1 FROM t1;
--error ER_QUERY_TIMEOUT
SELECT /*+ MAX_EXECUTION_TIME(1) */ *, SLEEP(1000) FROM t1;
--error ER_QUERY_TIMEOUT
SELECT /*+ MAX_EXECUTION_TIME(1) */ *, SLEEP(1000) FROM t1 UNION SELECT 1, 2, 3;
--error ER_QUERY_TIMEOUT
(SELECT /*+ MAX_EXECUTION_TIME(1) */ *, SLEEP(1000) FROM t1) UNION (SELECT 1, 2, 3);
--error ER_QUERY_TIMEOUT
((SELECT /*+ MAX_EXECUTION_TIME(1) */ *, SLEEP(1000) FROM t1));
--echo
--echo # only SELECT statements supports the MAX_EXECUTION_TIME hint (warning):
--echo
CREATE TABLE t2 (i INT);
INSERT /*+ MAX_EXECUTION_TIME(1) */ INTO t2 SELECT 1;
REPLACE /*+ MAX_EXECUTION_TIME(1) */ INTO t2 SELECT 1;
UPDATE /*+ MAX_EXECUTION_TIME(1) */ t2 SET i = 1;
DELETE /*+ MAX_EXECUTION_TIME(1) */ FROM t2 WHERE i = 1;
DROP TABLE t1, t2;
SELECT 1 FROM (SELECT /*+ MAX_EXECUTION_TIME(10) */ 1) a;
DELIMITER |;
CREATE FUNCTION f1() RETURNS INT BEGIN SELECT /*+ MAX_EXECUTION_TIME(10) */ 1
INTO @a; RETURN 1; END|
DELIMITER ;|
DROP FUNCTION f1;
|
