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# Test the MAX_STATEMENT_TIME option.
SET @@MAX_STATEMENT_TIME=2;
select @@max_statement_time;
@@max_statement_time
2.000000
SELECT SLEEP(1);
SLEEP(1)
0
SELECT SLEEP(3);
SLEEP(3)
1
SET @@MAX_STATEMENT_TIME=0;
SELECT SLEEP(1);
SLEEP(1)
0
SHOW STATUS LIKE "max_statement_time_exceeded";
Variable_name Value
Max_statement_time_exceeded 1
CREATE TABLE t1 (a INT, b VARCHAR(300)) engine=myisam;
INSERT INTO t1 VALUES (1, 'string');
SELECT 0;
0
0
# Test the MAX_STATEMENT_TIME option with SF (should have no effect).
CREATE PROCEDURE p1()
BEGIN
declare tmp int;
SET @@MAX_STATEMENT_TIME=0.0001;
SELECT COUNT(*) INTO tmp FROM t1 WHERE b LIKE '%z%';
SET @@MAX_STATEMENT_TIME=0;
END|
CREATE PROCEDURE p2()
BEGIN
SET @@MAX_STATEMENT_TIME=5;
END|
SELECT @@MAX_STATEMENT_TIME;
@@MAX_STATEMENT_TIME
0.000000
CALL p1();
CALL p2();
SELECT @@MAX_STATEMENT_TIME;
@@MAX_STATEMENT_TIME
5.000000
SET @@MAX_STATEMENT_TIME=0;
DROP PROCEDURE p1;
DROP PROCEDURE p2;
DROP TABLE t1;
# MAX_STATEMENT_TIME account resource
GRANT USAGE ON *.* TO user1@localhost WITH MAX_STATEMENT_TIME 1.005;
# con1
SELECT @@max_statement_time;
@@max_statement_time
1.005000
# restart and reconnect
set @global.userstat=1;
SELECT @@global.max_statement_time,@@session.max_statement_time;
@@global.max_statement_time @@session.max_statement_time
0.000000 1.005000
select sleep(100);
sleep(100)
1
SHOW STATUS LIKE "max_statement_time_exceeded";
Variable_name Value
Max_statement_time_exceeded 1
show grants for user1@localhost;
Grants for user1@localhost
GRANT USAGE ON *.* TO 'user1'@'localhost' WITH MAX_STATEMENT_TIME 1.005000
set @global.userstat=0;
DROP USER user1@localhost;
# MAX_STATEMENT_TIME status variables.
flush status;
SET @@max_statement_time=0;
SELECT CONVERT(VARIABLE_VALUE, UNSIGNED) INTO @time_exceeded
FROM INFORMATION_SCHEMA.GLOBAL_STATUS
WHERE VARIABLE_NAME = 'max_statement_time_exceeded';
SET @@max_statement_time=0.5;
SELECT SLEEP(2);
SLEEP(2)
1
SHOW STATUS LIKE '%timeout%';
Variable_name Value
Ssl_default_timeout 0
Ssl_session_cache_timeouts 0
SET @@max_statement_time=0;
# Ensure that the counters for:
# - statements that exceeded their maximum execution time
# are incremented.
SELECT 1 AS STATUS FROM INFORMATION_SCHEMA.GLOBAL_STATUS
WHERE VARIABLE_NAME = 'max_statement_time_exceeded'
AND CONVERT(VARIABLE_VALUE, UNSIGNED) > @time_exceeded;
STATUS
1
# Check that the appropriate error status is set.
CREATE TABLE t1 (a INT) ENGINE=InnoDB;
INSERT INTO t1 VALUES (1);
START TRANSACTION;
SELECT * FROM t1 FOR UPDATE;
a
1
SET @@SESSION.max_statement_time = 0.5;
UPDATE t1 SET a = 2;
ERROR 70100: Query execution was interrupted (max_statement_time exceeded)
SHOW WARNINGS;
Level Code Message
Error 1967 Query execution was interrupted (max_statement_time exceeded)
ROLLBACK;
DROP TABLE t1;
# Test interaction with lock waits.
CREATE TABLE t1 (a INT) ENGINE=InnoDB;
INSERT INTO t1 VALUES (1);
SET @@SESSION.max_statement_time= 0.5;
LOCK TABLES t1 WRITE;
SELECT @@SESSION.max_statement_time;
@@SESSION.max_statement_time
0.500000
LOCK TABLES t1 READ;
ERROR 70100: Query execution was interrupted (max_statement_time exceeded)
UNLOCK TABLES;
BEGIN;
SELECT * FROM t1;
a
1
ALTER TABLE t1 ADD COLUMN b INT;
ERROR 70100: Query execution was interrupted (max_statement_time exceeded)
ROLLBACK;
SELECT GET_LOCK('lock', 1);
GET_LOCK('lock', 1)
1
SELECT GET_LOCK('lock', 1);
GET_LOCK('lock', 1)
NULL
SELECT RELEASE_LOCK('lock');
RELEASE_LOCK('lock')
1
DROP TABLE t1;
|
