DROP DATABASE IF EXISTS mysqltest_db1;
CREATE DATABASE mysqltest_db1;
USE mysqltest_db1;
SET GLOBAL EVENT_SCHEDULER= OFF;
SET @save_time_zone= @@TIME_ZONE;
CREATE TABLE t_step (step INT);
INSERT INTO t_step VALUES (@step);
CREATE FUNCTION round_to_step(i INT, n INT) RETURNS INT
BEGIN
DECLARE step INT;
SELECT * INTO step FROM t_step;
# We add 0.1 as a protection from inexact division.
RETURN FLOOR((i % (step * n) + 0.1) / step);
END//
SET @step3= @step * 3;
SET @step6= @step * 6;
SET @unix_time= UNIX_TIMESTAMP() - 1;
SET @unix_time= @unix_time - @unix_time % @step6;
INSERT INTO mysql.time_zone VALUES (NULL, 'N');
SET @tzid= LAST_INSERT_ID();
INSERT INTO mysql.time_zone_transition_type
VALUES (@tzid, 0, 0, 0, 'b16420_0');
INSERT INTO mysql.time_zone_transition_type
VALUES (@tzid, 1, @step3 - @step, 1, 'b16420_1');
INSERT INTO mysql.time_zone_name VALUES ('<TZ_NAME_1>', @tzid);
CREATE TABLE t1 (count INT, unix_time INT, local_time INT, comment CHAR(80));
CREATE TABLE t2 (count INT);
INSERT INTO t2 VALUES (1);
CREATE FUNCTION f1(comment CHAR(80)) RETURNS INT
BEGIN
DECLARE orig_tz CHAR(64);
DECLARE unix_time INT;
DECLARE local_now DATETIME;
DECLARE utc_now DATETIME;
DECLARE local_time INT;
SET unix_time= UNIX_TIMESTAMP();
SET local_now= FROM_UNIXTIME(unix_time);
SET orig_tz= @@TIME_ZONE;
SET TIME_ZONE = '+00:00';
SET utc_now= FROM_UNIXTIME(unix_time);
SET TIME_ZONE= orig_tz;
SET local_time = unix_time + TIMESTAMPDIFF(SECOND, utc_now, local_now);
SET unix_time= round_to_step(unix_time, 6);
SET local_time= round_to_step(local_time, 6);
INSERT INTO t1 VALUES ((SELECT count FROM t2),
unix_time, local_time, comment);
RETURN 0;
END//
SET TIME_ZONE= '+00:00';
CREATE EVENT e1 ON SCHEDULE EVERY @step SECOND
STARTS FROM_UNIXTIME(@unix_time) DO SELECT f1("<e1>");
SET TIME_ZONE= '<TZ_NAME_1>';
CREATE EVENT e2 ON SCHEDULE EVERY @step SECOND
STARTS FROM_UNIXTIME(@unix_time) DO SELECT f1("<e2>");
SET GLOBAL EVENT_SCHEDULER= ON;
SELECT SLEEP(@step / 2);
SLEEP(@step / 2)
0
SET GLOBAL EVENT_SCHEDULER= OFF;
SELECT * FROM t1 ORDER BY count, comment;
count	unix_time	local_time	comment
1	1	1	<e1>
1	1	3	<e2>
1	1	3	e2 should be executed
2	2	2	<e1>
2	2	4	<e2>
2	2	4	e2 should be executed
3	3	3	<e1>
3	3	3	Second pass after backward -2 step shift, e2 should not be executed
4	4	4	<e1>
4	4	4	Second pass after backward -2 step shift, e2 should not be executed
5	5	5	<e1>
5	5	5	<e2>
5	5	5	e2 should be executed
6	0	0	<e1>
6	0	2	<e2>
6	0	2	Forward +2 step shift, local 0, 1 are skipped, e2 should be executed
7	1	1	<e1>
7	1	3	<e2>
7	1	3	e2 should be executed
SET TIME_ZONE= @save_time_zone;
DROP EVENT e2;
DROP EVENT e1;
DROP FUNCTION f1;
DROP TABLE t1, t2;
DELETE FROM mysql.time_zone_name            WHERE time_zone_id = @tzid;
DELETE FROM mysql.time_zone_transition_type WHERE time_zone_id = @tzid;
DELETE FROM mysql.time_zone_transition      WHERE time_zone_id = @tzid;
DELETE FROM mysql.time_zone                 WHERE time_zone_id = @tzid;
ALTER TABLE mysql.time_zone AUTO_INCREMENT = 6;
SET TIME_ZONE= '+00:00';
CREATE TABLE t1 (event CHAR(2), dt DATE, offset INT);
INSERT INTO mysql.time_zone VALUES (NULL, 'N');
SET @tzid= LAST_INSERT_ID();
SET @now= UNIX_TIMESTAMP();
SET @offset_month_01= UNIX_TIMESTAMP('2030-01-31 12:00:00') - @now;
SET @offset_month_02= UNIX_TIMESTAMP('2030-02-28 12:00:00') - @now - 5*@step;
SET @offset_month_03= UNIX_TIMESTAMP('2030-03-31 12:00:00') - @now - 5*@step;
SET @offset_month_04= UNIX_TIMESTAMP('2030-04-30 12:00:00') - @now - 13*@step;
INSERT INTO mysql.time_zone_transition_type
VALUES (@tzid, 0, @offset_month_01, 0, 'b16420_0');
INSERT INTO mysql.time_zone_transition_type
VALUES (@tzid, 1, @offset_month_02, 1, 'b16420_1');
INSERT INTO mysql.time_zone_transition_type
VALUES (@tzid, 2, @offset_month_03, 1, 'b16420_2');
INSERT INTO mysql.time_zone_transition_type
VALUES (@tzid, 3, @offset_month_04, 1, 'b16420_3');
INSERT INTO mysql.time_zone_transition
VALUES (@tzid, @now, 0);
INSERT INTO mysql.time_zone_transition
VALUES (@tzid, @now + 3 * @step, 1);
INSERT INTO mysql.time_zone_transition
VALUES (@tzid, @now + 7 * @step, 2);
INSERT INTO mysql.time_zone_transition
VALUES (@tzid, @now + 12 * @step, 3);
INSERT INTO mysql.time_zone_name VALUES ('<TZ_NAME_2>', @tzid);
SET TIME_ZONE= '<TZ_NAME_2>';
SET GLOBAL EVENT_SCHEDULER= ON;
SET GLOBAL EVENT_SCHEDULER= OFF;
Below we should see the following:
- On Jan 31 only e2 is executed, because we started later than
e1 should have been executed.  Offset of e2 is 0 because of
the late start, not 1.
- The next execution is on Feb 28 (last day of Feb).  Both events
are executed in their times, offsets are -1 and 1.
- The next time is Mar 31.  Because the time of event
execution was skipped over, events are executed right away,
offsets are 2 and 2.
- The next time is Apr 30.  Events are again executed in their
appointed times, offsets are -1 and 1.
SELECT * FROM t1 ORDER BY dt, event;
event	dt	offset
e2	2030-01-31	0
e1	2030-02-28	-1
e2	2030-02-28	1
e1	2030-03-31	2
e2	2030-03-31	2
e1	2030-04-30	-1
e2	2030-04-30	1
DROP EVENT e2;
DROP EVENT e1;
DROP TABLE t1;
SET TIME_ZONE= @save_time_zone;
DELETE FROM mysql.time_zone_name            WHERE time_zone_id = @tzid;
DELETE FROM mysql.time_zone_transition_type WHERE time_zone_id = @tzid;
DELETE FROM mysql.time_zone_transition      WHERE time_zone_id = @tzid;
DELETE FROM mysql.time_zone                 WHERE time_zone_id = @tzid;
ALTER TABLE mysql.time_zone AUTO_INCREMENT = 6;
DROP FUNCTION round_to_step;
DROP TABLE t_step;
DROP DATABASE mysqltest_db1;
End of 5.1 tests.
