-- 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 ;
以上就是MySQL存储过程-->通过游标遍历和异常处理迁移数据到历史表 的内容,更多相关内容请关注PHP中文网(www.php.cn)!