mysql定时执行存储过程_MySQL

将事件计划开启: set global event_scheduler=1;

关闭事件任务: alter event e_test ON COMPLETION PRESERVE DISABLE;

开户事件任务: alter event e_test ON COMPLETION PRESERVE ENABLE;

简单实例.

创建表 CREATE TABLE test(endtime DATETIME);

创建存储过程test

CREATE PROCEDURE test ()

BEGIN

update examinfo SET endtime = now() WHERE id = 14;

END;

创建event e_test

CREATE EVENT if not exists e_test

on schedule every 30 second

on completion preserve

do call test();

每隔30秒将执行存储过程test,将当前时间更新到examinfo表中id=14的记录的endtime字段中去

1) 首先来看一个简单的例子来演示每秒插入一条记录到数据表

USE test;

CREATE TABLE aaa (timeline TIMESTAMP);

CREATE EVENT e_test_insert

ON SCHEDULE EVERY 1 SECOND

DO INSERT INTO test.aaa VALUES (CURRENT_TIMESTAMP);

等待3秒钟后，再执行查询看看：

copyright dedecms

mysql> SELECT * FROM aaa;

+———————+

| timeline |

+———————+

| 2007-07-18 20:44:26 |

| 2007-07-18 20:44:27 |

| 2007-07-18 20:44:28 |

+———————+

2) 5天后清空test表：

CREATE EVENT e_test

ON SCHEDULE AT CURRENT_TIMESTAMP + INTERVAL 5 DAY

DO TRUNCATE TABLE test.aaa;

3) 2007年7月20日12点整清空test表：

CREATE EVENT e_test

ON SCHEDULE AT TIMESTAMP '2007-07-20 12:00:00'

DO TRUNCATE TABLE test.aaa;

4) 每天定时清空test表：

CREATE EVENT e_test

ON SCHEDULE EVERY 1 DAY

DO TRUNCATE TABLE test.aaa;

5) 5天后开启每天定时清空test表：

CREATE EVENT e_test

ON SCHEDULE EVERY 1 DAY

STARTS CURRENT_TIMESTAMP + INTERVAL 5 DAY

DO TRUNCATE TABLE test.aaa;

6) 每天定时清空test表，5天后停止执行：

CREATE EVENT e_test

ON SCHEDULE EVERY 1 DAY

ENDS CURRENT_TIMESTAMP + INTERVAL 5 DAY

DO TRUNCATE TABLE test.aaa;

CREATE EVENT e_test

ON SCHEDULE EVERY 1 DAY

STARTS CURRENT_TIMESTAMP + INTERVAL 5 DAY

ENDS CURRENT_TIMESTAMP + INTERVAL 1 MONTH

DO TRUNCATE TABLE test.aaa;

[ON COMPLETION [NOT] PRESERVE]可以设置这个事件是执行一次还是持久执行，默认为NOT PRESERVE。

8) 每天定时清空test表(只执行一次，任务完成后就终止该事件)：

CREATE EVENT e_test

ON SCHEDULE EVERY 1 DAY

ON COMPLETION NOT PRESERVE

DO TRUNCATE TABLE test.aaa;

[ENABLE | DISABLE]可是设置该事件创建后状态是否开启或关闭，默认为ENABLE。

[COMMENT ‘comment’]可以给该事件加上注释。

三、修改事件(ALTER EVENT)

ALTER EVENT event_name

[ON SCHEDULE schedule]

[RENAME TO new_event_name]

[ON COMPLETION [NOT] PRESERVE]

[COMMENT 'comment']

[ENABLE | DISABLE]

[DO sql_statement]

1) 临时关闭事件

ALTER EVENT e_test DISABLE;

2) 开启事件

ALTER EVENT e_test ENABLE;

3) 将每天清空test表改为5天清空一次：

ALTER EVENT e_test

ON SCHEDULE EVERY 5 DAY;

四、删除事件(DROP EVENT)

织梦好，好织梦

语 法很简单，如下所示：

DROP EVENT [IF EXISTS] event_name

例如删除前面创建的e_test事件

DROP EVENT e_test;

当然前提是这个事件存在，否则会产生ERROR 1513 (HY000): Unknown event错误，因此最好加上IF EXISTS

DROP EVENT IF EXISTS e_test;

create event test

ON SCHEDULE AT '2007-09-01 12:00:00' + INTERVAL 1 DAY

on completion not preserve

do insert into yyy values('hhh','uuu');

解释：从2007-09-01开始，每天对表yyy在12：00：00进行一个插入操作。而且只执行一次（on completion not preserve ）

我的计划任务为：

create event sysplan

ON SCHEDULE AT '2014-05-22 23:00:00' + INTERVAL 1 DAY

on completion not preserve

do truncate table bjproj.ae_tmp;

三、通过设定全局变量event_scheduler 的值即可动态的控制事件调度器是否启用。

查看是否event_scheduler开启mysql> SHOW VARIABLES LIKE '%event%';

设置开启mysql> SET GLOBAL event_scheduler=ON;

四、例子:

每分钟插入一条日志:DELIMITER //CREATE EVENT `user_log_event` ON SCHEDULE EVERY 1 MINUTE STARTS '2014-05-27 00:00:00' ON COMPLETION NOT PRESERVE ENABLE DO BEGIN INSERT INTO log SET addtime=NOW();END//

织梦好，好织梦