MySQL定时器开启、调用_MySQL

MySQL定时器开启、调用

创建测试表

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CREATE TABLE t

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(

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v VARCHAR(100) NOT NULL

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) ENGINE INNODB DEFAULT CHARSET=utf8;

创建定时器 调用的存储过程

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DELIMITER $$

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DROP PROCEDURE IF EXISTS e_test $$

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CREATE PROCEDURE e_test()

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BEGIN

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INSERT INTO t VALUES('1');

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END $$

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DELIMITER ;

要使定时起作用 MySQL的常量GLOBAL event_scheduler必须为on或者是1

-- 查看是否开启定时器

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SHOW VARIABLES LIKE '%sche%';

-- 开启定时器 0：off 1：on

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SET GLOBAL event_scheduler = 1;

-- 创建事件

--每隔一秒自动调用e_test()存储过程

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CREATE EVENT IF NOT EXISTS event_test

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ON SCHEDULE EVERY 1 SECOND

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ON COMPLETION PRESERVE

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DO CALL e_test();

-- 开启事件

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ALTER EVENT event_test ON

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COMPLETION PRESERVE ENABLE;

-- 关闭事件

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ALTER EVENT event_test ON

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COMPLETION PRESERVE DISABLE;

从现在开始每隔九天定时执行

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CREATE EVENT EVENT1

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ON SCHEDULE EVERY 9 DAY STARTS NOW()

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ON COMPLETION PRESERVE ENABLE

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DO

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BEGIN

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CALL TOTAL();

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END

每个月的一号凌晨1 点执行

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CREATE EVENT EVENT2

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ON SCHEDULE EVERY 1 MONTH STARTS DATE_ADD(DATE_ADD(DATE_SUB(CURDATE(),INTERVAL DAY(CURDATE())-1 DAY), INTERVAL 1 MONTH),INTERVAL 1 HOUR)

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ON COMPLETION PRESERVE ENABLE

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DO

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BEGIN

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CALL STAT();

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END

每个季度一号的凌晨2点执行

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CREATE EVENT TOTAL_SEASON_EVENT

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ON SCHEDULE EVERY 1 QUARTER STARTS DATE_ADD(DATE_ADD(DATE( CONCAT(YEAR(CURDATE()),'-',ELT(QUARTER(CURDATE()),1,4,7,10),'-',1)),INTERVAL 1 QUARTER),INTERVAL 2 HOUR)

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ON COMPLETION PRESERVE ENABLE

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DO

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BEGIN

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CALL SEASON_STAT();

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END

每年1月1号凌晨四点执行

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CREATE EVENT TOTAL_YEAR_EVENT

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ON SCHEDULE EVERY 1 YEAR STARTS DATE_ADD(DATE(CONCAT(YEAR(CURDATE()) + 1,'-',1,'-',1)),INTERVAL 4 HOUR)

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ON COMPLETION PRESERVE ENABLE

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DO

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BEGIN

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CALL YEAR_STAT();

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END

MySQL的event在进行按月，季，年进行自动调用存储过程时，为了测试可以把系统改为年的最后一天，如2010-12-31 23：59：55;