mysql> show create event online_event;
+--------------+-----------------------------------------+-----------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------+----------------------+--------------------+
| Event | sql_mode | time_zone | Create Event | character_set_client | collation_connection | Database Collation |
+--------------+-----------------------------------------+-----------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------+----------------------+--------------------+
| online_event | STRICT_TRANS_TABLES,NO_AUTO_CREATE_USER | SYSTEM | CREATE EVENT `online_event` ON SCHEDULE EVERY 1 SECOND STARTS '2009-06-03 06:54:16' ON COMPLETION NOT PRESERVE ENABLE DO DELETE FROM online where webserver_id is null and jabber_server_id is null | utf8 | utf8_general_ci | utf8_general_ci |
+--------------+-----------------------------------------+-----------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------------------+----------------------+--------------------+
1 row in set (0.00 sec)
mysql>
它是这样创建的:
CREATE EVENT online_event
ON SCHEDULE EVERY 1 SECOND
DO
DELETE FROM online where webserver_id is null and jabber_server_id is null;
经过一段时间,我发现:
mysql> select *from online;
+----+------------+---------------------+--------------+------------------+
| id | account_id | since | webserver_id | jabber_server_id |
+----+------------+---------------------+--------------+------------------+
| 1 | 30 | 2009-06-03 06:24:38 | NULL | NULL |
+----+------------+---------------------+--------------+------------------+
1 row in set (0.00 sec)
所以我发现该活动根本没有举办。
您的活动调度程序正在运行吗?请使用
SHOW PROCESSLIST
进行检查。
如果用户“event_scheduler”没有进程“Daemon”,那么它就不会运行。
启动事件调度程序:
SET GLOBAL event_scheduler = ON;
另请参阅 http://dev.mysql.com/doc/refman/en/events-configuration.html
首先您必须检查使用:
SHOW VARIABLES LIKE 'event_scheduler';
如果它关闭,您必须使用以下命令运行事件调度程序:
SET GLOBAL event_scheduler = ON;
我的你必须将此变量保存在你的配置(my.ini / my.conf)中,如果你不这样做,当 mysql 重新启动时事件将不会启动。
[mysql]
event_scheduler=ON