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MySQL stored procedure-->Migrate data to history table through cursor traversal and exception handling
MySQL stored procedure-->Migrate data to history table through cursor traversal and exception handling
-- Large table data migration,Every morning1 Click to 5 and click to execute, the execution interval is 10 minutes, migrate old data to the history table.
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;
## -- This is to determine whether the cursor has reached the end
FETCH cur_oalid INTO p_oalid;
Perform data migration WHILE STOP <> 1 DO
-- select p_id;
START TRANSACTION;
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;The above is the content of the MySQL stored procedure --> migrating data to the history table through cursor traversal and exception handling. For more related content, please pay attention to the PHP Chinese website (www.php. cn)!
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