1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
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.