---------------以下代码在MYSQL-Front下测试通过(MySQL Browser不行)-------------
无法保证事件操作的一致性--MYSQL下好像不支持alter,crate table等操作的回滚
-------------------------------------------------------------------------------
修改和新建表的存储过程:
CREATE PROCEDURE Alter_create_tablename(in tablename varchar(10))
BEGIN
declare predatetime varchar(10);
declare newtablename varchar(20);
set predatetime=(select date_format(date_sub(now(),interval 1 day),'%Y%m%d'));
set newtablename=concat(tablename,predatetime);
set @altertablesql=concat('ALTER TABLE ',tablename,' RENAME TO ',newtablename); #不能进行事务处理，无法回滚
set @createtablesql=concat('create table ',tablename,' select * from ',newtablename,' where 1=2 ');
PREPARE altertablesql from @altertablesql;
Execute altertablesql;
commit;
PREPARE createtablesql from @createtablesql;
Execute createtablesql;
commit;
END
----------------------------------------------------
定时器: (必须运行在MYSQL5.1版本之上，又名事件调度器)
Select @@event_scheduler;
SET GLOBAL event_scheduler = ON; 开启调度器
CREATE EVENT IF NOT EXISTS Alter_create_Event
ON SCHEDULE EVERY 1 DAY
Starts DATE_ADD(CONCAT(YEAR(CURDATE()),'-',Month(CURDATE()),'-',Day(CURDATE()),' 23:00:12'),INTERVAL 1 HOUR)
ON COMPLETION PRESERVE ENABLE
Do
begin
call Alter_create_tablename("student");
end
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