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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;
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