MySQL定时器开启、调用实现代码

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('');
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