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6d8f6b5bfd
BUG#26429: SHOW CREATE EVENT is incorrect for an event that
STARTS NOW()
BUG#26431: Impossible to re-create an event from backup if its
STARTS clause is in the past
WL#3698: Events: execution in local time zone
The problem was that local times specified by the user in AT, STARTS
and ENDS of CREATE EVENT/ALTER EVENT statement were converted to UTC,
and the original time zone was forgotten. This way, event scheduler
couldn't honor Daylight Saving Time shifts, and times shown to the
user were also in UTC. Additionally, CREATE EVENT didn't allow times
in the past, thus preventing straightforward event restoration from
old backups.
This patch reworks event scheduler time computations, performing them
in the time zone associated with the event. Also it allows times to
be in the past.
The patch adds time_zone column to mysql.event table.
NOTE: The patch is almost final, but the bug#9953 should be pushed
first.
86 lines
3.1 KiB
Text
86 lines
3.1 KiB
Text
CREATE DATABASE IF NOT EXISTS events_test;
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USE events_test;
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SET GLOBAL event_scheduler=OFF;
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SHOW VARIABLES LIKE 'event_scheduler';
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Variable_name Value
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event_scheduler OFF
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SET GLOBAL event_scheduler=1;
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SHOW VARIABLES LIKE 'event_scheduler';
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Variable_name Value
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event_scheduler ON
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SET GLOBAL event_scheduler=0;
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SHOW VARIABLES LIKE 'event_scheduler';
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Variable_name Value
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event_scheduler OFF
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SET GLOBAL event_scheduler=ON;
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SHOW VARIABLES LIKE 'event_scheduler';
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Variable_name Value
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event_scheduler ON
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SET GLOBAL event_scheduler=DISABLED;
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ERROR 42000: Variable 'event_scheduler' can't be set to the value of 'DISABLED'
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SHOW VARIABLES LIKE 'event_scheduler';
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Variable_name Value
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event_scheduler ON
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SET GLOBAL event_scheduler=-1;
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ERROR 42000: Variable 'event_scheduler' can't be set to the value of '-1'
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SHOW VARIABLES LIKE 'event_scheduler';
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Variable_name Value
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event_scheduler ON
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SET GLOBAL event_scheduler=2;
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ERROR 42000: Variable 'event_scheduler' can't be set to the value of '2'
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SHOW VARIABLES LIKE 'event_scheduler';
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Variable_name Value
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event_scheduler ON
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SET GLOBAL event_scheduler=5;
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ERROR 42000: Variable 'event_scheduler' can't be set to the value of '5'
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SHOW VARIABLES LIKE 'event_scheduler';
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Variable_name Value
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event_scheduler ON
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CREATE TABLE table_1(a int);
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CREATE TABLE table_2(a int);
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CREATE TABLE table_3(a int);
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CREATE TABLE table_4(a int);
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CREATE TABLE T19170(s1 TIMESTAMP);
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SET GLOBAL event_scheduler=ON;
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CREATE EVENT two_sec ON SCHEDULE EVERY 2 SECOND DO INSERT INTO table_1 VALUES(1);
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CREATE EVENT start_n_end
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ON SCHEDULE EVERY 1 SECOND
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ENDS NOW() + INTERVAL 6 SECOND
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ON COMPLETION PRESERVE
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DO INSERT INTO table_2 VALUES(1);
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CREATE EVENT only_one_time ON SCHEDULE EVERY 2 SECOND ENDS NOW() + INTERVAL 1 SECOND DO INSERT INTO table_3 VALUES(1);
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CREATE EVENT two_time ON SCHEDULE EVERY 1 SECOND ENDS NOW() + INTERVAL 1 SECOND ON COMPLETION PRESERVE DO INSERT INTO table_4 VALUES(1);
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SELECT IF(SUM(a) >= 4, 'OK', 'ERROR') FROM table_1;
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IF(SUM(a) >= 4, 'OK', 'ERROR')
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OK
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SELECT IF(SUM(a) >= 5, 'OK', 'ERROR') FROM table_2;
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IF(SUM(a) >= 5, 'OK', 'ERROR')
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OK
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SELECT IF(SUM(a) > 0, 'OK', 'ERROR') FROM table_3;
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IF(SUM(a) > 0, 'OK', 'ERROR')
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OK
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SELECT IF(SUM(a) > 0, 'OK', 'ERROR') FROM table_4;
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IF(SUM(a) > 0, 'OK', 'ERROR')
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OK
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DROP EVENT two_sec;
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SELECT IF(TIME_TO_SEC(TIMEDIFF(ENDS,STARTS))=6, 'OK', 'ERROR') FROM INFORMATION_SCHEMA.EVENTS WHERE EVENT_SCHEMA=DATABASE() AND EVENT_NAME='start_n_end' AND ENDS IS NOT NULL;
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IF(TIME_TO_SEC(TIMEDIFF(ENDS,STARTS))=6, 'OK', 'ERROR')
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OK
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SELECT IF(LAST_EXECUTED-ENDS < 3, 'OK', 'ERROR') FROM INFORMATION_SCHEMA.EVENTS WHERE EVENT_SCHEMA=DATABASE() AND EVENT_NAME='start_n_end' AND ENDS IS NOT NULL;
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IF(LAST_EXECUTED-ENDS < 3, 'OK', 'ERROR')
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OK
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DROP EVENT start_n_end;
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"Already dropped because ended. Therefore an error."
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DROP EVENT only_one_time;
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ERROR HY000: Unknown event 'only_one_time'
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"Should be preserved"
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SELECT EVENT_NAME, STATUS FROM INFORMATION_SCHEMA.EVENTS ORDER BY EVENT_NAME;
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EVENT_NAME STATUS
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two_time DISABLED
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DROP EVENT two_time;
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DROP TABLE table_1;
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DROP TABLE table_2;
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DROP TABLE table_3;
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DROP TABLE table_4;
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DROP DATABASE events_test;
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SET GLOBAL event_scheduler=OFF;
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