mysql怎么让一个存储过程定时执行

mysql怎么让一个存储过程定时执行

查看event是否开启: show variables like '%sche%'

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：

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

7) 5天后开启每天定时清空test表，一个月后停止执行：

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)

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 *** 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 '2010-05-22 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 '2010-12-27 00:00:00' ON COMPLETION NOT PRESERVE ENABLE DO BEGIN INSERT INTO log SET addtime=NOW()END//

调用存储过程:DELIMITER //CREATE EVENT `user_log_event` ON SCHEDULE EVERY 1 DAY STARTS '2010-00-00 00:00:00' ON COMPLETION NOT PRESERVE ENABLE DO BEGINCALL user_log_prov()END//

需要将t_app_message中的消息（将要被发送的消息）给每一个学生发送一遍，并且在发送完成后，将消息置为已发送状态已发送状态。

一言不合上代码

1 /*删除存储过程*/

2 drop procedure if exists proc_sendAllMsg

3 /*创建存储过程*/

4 CREATE PROCEDURE proc_sendAllMsg()

5 BEGIN

6 /*先插入*/

7 INSERT t_base_message (sid,mid)

8 SELECT a.id,b.id from t_base_student a

9 INNER JOIN t_app_message b

10 where a.School_id = 1 and b.sendtime<=NOW() and b.sendstatus = 0

11 UPDATE t_app_message SET sendstatus = 1 where sendtime <=NOW()

12 UPDATE t_app_message SET showstatus = 1 where endtime <=NOW()

13 end

14

15 /*指定数据库*/

16 use xscp

17 /*删除原有的定时任务*/

18 drop event if exists event_sendAllMsg

19

20 CREATE EVENT event_sendAllMsg ON SCHEDULE EVERY 30 second starts '2017-12-11 00:00:00'

21 DO

22 CALL proc_sendAllMsg/*调用存储过程*/

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