MySQL定时器

创建测试表

CREATE TABLE t  (      v VARCHAR(100) NOT NULL  ) ENGINE INNODB DEFAULT CHARSET=utf8;

创建定时器 调用的存储过程

DELIMITER $$  DROP PROCEDURE IF EXISTS e_test $$  CREATE PROCEDURE e_test()       BEGIN          INSERT INTO t VALUES('1');      END $$  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

SHOW VARIABLES LIKE '%sche%';

-- 开启定时器 0：off 1：on

SET GLOBAL event_scheduler = 1;

-- 创建事件


--每隔一秒自动调用e_test()存储过程

CREATE EVENT IF NOT EXISTS event_test  ON SCHEDULE EVERY 1 SECOND  ON COMPLETION PRESERVE     DO CALL e_test();

-- 开启事件

ALTER EVENT event_test ON      COMPLETION PRESERVE ENABLE;

 
-- 关闭事件

ALTER EVENT event_test ON      COMPLETION PRESERVE DISABLE;

从现在开始每隔九天定时执行  

CREATE  EVENT EVENT1    ON SCHEDULE EVERY 9 DAY STARTS NOW()    ON COMPLETION PRESERVE ENABLE    DO       BEGIN           CALL TOTAL();        END

每个月的一号凌晨1 点执行  

CREATE  EVENT EVENT2       ON SCHEDULE EVERY 1 MONTH STARTS DATE_ADD(DATE_ADD(DATE_SUB(CURDATE(),INTERVAL DAY(CURDATE())-1 DAY), INTERVAL 1 MONTH),INTERVAL 1 HOUR)    ON COMPLETION PRESERVE ENABLE    DO        BEGIN            CALL STAT();        END

每个季度一号的凌晨2点执行  

CREATE  EVENT TOTAL_SEASON_EVENT    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)    ON COMPLETION PRESERVE ENABLE    DO        BEGIN            CALL SEASON_STAT();        END

每年1月1号凌晨四点执行  

CREATE  EVENT TOTAL_YEAR_EVENT    ON SCHEDULE EVERY 1 YEAR STARTS DATE_ADD(DATE(CONCAT(YEAR(CURDATE()) + 1,'-',1,'-',1)),INTERVAL 4 HOUR)    ON COMPLETION PRESERVE ENABLE    DO        BEGIN            CALL YEAR_STAT();        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;