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# WL#8017 Infrastructure for Optimizer Hints
# MAX_EXECUTION_TIME hint testing
# 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;
SELECT /*+ MAX_EXECUTION_TIME(1) */ * FROM t1 a, t1 b;
ERROR HY000: Query execution was interrupted, maximum statement execution time exceeded
EXPLAIN SELECT /*+ MAX_EXECUTION_TIME(10) MAX_EXECUTION_TIME(100) */ * FROM t1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 2048 100.00 NULL
Warnings:
Warning 3126 Hint MAX_EXECUTION_TIME(100) is ignored as conflicting/duplicated
Note 1003 /* select#1 */ select /*+ MAX_EXECUTION_TIME(10) */ `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1`
DROP TABLE t1;
# test the MAX_EXECUTION_TIME hint for SELECT statements:
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;
1
1
1
Warnings:
Warning 1064 Unsupported MAX_EXECUTION_TIME near ') */ 1 FROM t1' at line 1
SELECT /*+ MAX_EXECUTION_TIME(1) */ *, SLEEP(1000) FROM t1;
ERROR HY000: Query execution was interrupted, maximum statement execution time exceeded
SELECT /*+ MAX_EXECUTION_TIME(1) */ *, SLEEP(1000) FROM t1 UNION SELECT 1, 2, 3;
ERROR HY000: Query execution was interrupted, maximum statement execution time exceeded
(SELECT /*+ MAX_EXECUTION_TIME(1) */ *, SLEEP(1000) FROM t1) UNION (SELECT 1, 2, 3);
ERROR HY000: Query execution was interrupted, maximum statement execution time exceeded
((SELECT /*+ MAX_EXECUTION_TIME(1) */ *, SLEEP(1000) FROM t1));
ERROR HY000: Query execution was interrupted, maximum statement execution time exceeded
# only SELECT statements supports the MAX_EXECUTION_TIME hint (warning):
CREATE TABLE t2 (i INT);
INSERT /*+ MAX_EXECUTION_TIME(1) */ INTO t2 SELECT 1;
Warnings:
Warning 3125 MAX_EXECUTION_TIME hint is supported by top-level standalone SELECT statements only
REPLACE /*+ MAX_EXECUTION_TIME(1) */ INTO t2 SELECT 1;
Warnings:
Warning 3125 MAX_EXECUTION_TIME hint is supported by top-level standalone SELECT statements only
UPDATE /*+ MAX_EXECUTION_TIME(1) */ t2 SET i = 1;
Warnings:
Warning 3125 MAX_EXECUTION_TIME hint is supported by top-level standalone SELECT statements only
DELETE /*+ MAX_EXECUTION_TIME(1) */ FROM t2 WHERE i = 1;
Warnings:
Warning 3125 MAX_EXECUTION_TIME hint is supported by top-level standalone SELECT statements only
DROP TABLE t1, t2;
SELECT 1 FROM (SELECT /*+ MAX_EXECUTION_TIME(10) */ 1) a;
1
1
Warnings:
Warning 3125 MAX_EXECUTION_TIME hint is supported by top-level standalone SELECT statements only
CREATE FUNCTION f1() RETURNS INT BEGIN SELECT /*+ MAX_EXECUTION_TIME(10) */ 1
INTO @a; RETURN 1; END|
Warnings:
Warning 3125 MAX_EXECUTION_TIME hint is supported by top-level standalone SELECT statements only
DROP FUNCTION f1;
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