MySQL存储过程-->通过游标遍历和异常处理迁移数据到历史表

-- 大表数据迁移,每天凌晨1点到5点执行,执行间隔时间10分钟，迁移旧数据到历史表。

DELIMITER $$

USE `dbx`$$

DROP PROCEDURE IF EXISTS `pro_xx`$$

CREATE  PROCEDURE `pro_xx`()

BEGIN  

   DECLARE p_oalid INT DEFAULT 0;

   DECLARE STOP INT DEFAULT 0; 

   

   DECLARE cur_oalid CURSOR FOR

         SELECToal.id FROM oal_xxx oal WHERE oal.`ymd` <CONCAT(YEAR(DATE_ADD(NOW(),INTERVAL -1 MONTH)),'-',MONTH(DATE_ADD(NOW(),INTERVAL -1 MONTH )),'-',DAY(DATE_ADD(NOW(),INTERVAL-1 MONTH ))) LIMIT 1000;  

   DECLARE EXIT HANDLER FOR SQLSTATE '02000'  /**包含游标not found*/

   BEGIN

        SET STOP=1;

         INSERTINTO db_logs(log_type,table_name,action_name,log_msg,create_time)

         SELECT1, 'oal_xxx','pro_oal_log_move',CONCAT('primary key:',p_oalid,' 游标执行正常结束！'),NOW();       

   END;

       

   DECLARE EXIT HANDLER FOR SQLEXCEPTION

   BEGIN

         SETSTOP=1;

         INSERTINTO db_logs(log_type,table_name,action_name,log_msg,create_time)

         SELECT2, 'oal_xxx','pro_oal_log_move',CONCAT('primary key:',p_oalid,' 移动执行失败'),NOW();

   END; 

   

   OPEN cur_oalid;      

      

    -- 读取一行数据到变量  

   FETCH cur_oalid INTO p_oalid;

     -- 这个就是判断是否游标已经到达了最后  

   WHILE STOP <> 1 DO 

         -- select p_id;

         START TRANSACTION; 

     --   进行数据迁移

             REPLACE INTO oal_xxx_history SELECT oal.*FROM oal_xxx oal WHERE oal.id=p_oalid ;

             DELETE FROM oal_xxx WHERE id=p_oalid;

                          

             -- INSERT INTO t (tid) VALUES (p_tid);

         COMMIT;  

            

           

        -- 读取下一行的数据   

       FETCH cur_oalid INTO p_oalid;

      END WHILE;         

   CLOSE cur_oalid; -- 关闭游标  

 END$$

DELIMITER ;