逐步讲解MySQL中定时事件计划的创建

SHOW VARIABLES LIKE 'event_scheduler';
SELECT @@event_scheduler;
SHOW PROCESSLIST;

SET GLOBAL event_scheduler = 1;
SET @@global.event_scheduler = 1;
SET GLOBAL event_scheduler = ON;
SET @@global.event_scheduler = ON;

SELECT HOST,USER,Event_priv FROM mysql.user;

UPDATE mysql.user SET Event_priv = 'Y' WHERE HOST='%' AND USER='bfsql'; 
FLUSH PRIVILEGES; 

CREATE EVENT [IF NOT EXISTS] event_name
ON SCHEDULE schedule
[ON COMPLETION [NOT] PRESERVE]
[ENABLE | DISABLE]
[COMMENT 'comment']
DO sql_statement

DELIMITER $$
CREATE EVENT IF NOT EXISTS e_blog
ON SCHEDULE EVERY 30 SECOND
ON COMPLETION PRESERVE
DO BEGIN
CALL MoveBlogData();
END$$
DELIMITER ;

--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 

ALTER EVENT e_test ON COMPLETION PRESERVE ENABLE;

ALTER EVENT e_test ON COMPLETION PRESERVE DISABLE;

create table mytable (
id int auto_increment not null,
name varchar(100) not null default '',
introduce text not null,
createtime timestamp not null,
constraint pk_mytable primary key(id)
)

create procedure mypro()
BEGIN
insert into mytable (name,introduce,createtime) values ('1111','inner mongolia',now());
end;

create event if not exists eventJob 
on schedule every 1 second 
on completion PRESERVE
do call mypro();

SET GLOBAL event_scheduler = 1; -- 启动定时器
SET GLOBAL event_scheduler = 0; -- 停止定时器

ALTER EVENT eventJob ON COMPLETION PRESERVE ENABLE;  -- 开启事件
ALTER EVENT eventJob ON COMPLETION PRESERVE DISABLE; -- 关闭事件


SHOW VARIABLES LIKE '%sche%'; -- 查看定时器状态

select * from mytable