MySQL預存程序-->透過遊標遍歷和異常處理遷移資料到歷史表

-- 大表資料遷移,每天凌晨1 點執行,執行間隔時間10分鐘，遷移舊資料到歷史表。

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)),&#39;-&#39;,MONTH(DATE_ADD(NOW(),INTERVAL -1 MONTH )),&#39;-&#39;,
         DAY(DATE_ADD(NOW(),INTERVAL-1 MONTH ))) LIMIT 1000;  
   DECLARE EXIT HANDLER FOR SQLSTATE &#39;02000&#39;  /**包含游标not found*/
   BEGIN
        SET STOP=1;
         INSERTINTO db_logs(log_type,table_name,action_name,log_msg,create_time)
         SELECT1, &#39;oal_xxx&#39;,&#39;pro_oal_log_move&#39;,CONCAT(&#39;primary key:&#39;,p_oalid,&#39; 游标执行正常结束！&#39;),NOW();       
   END;
       
   DECLARE EXIT HANDLER FOR SQLEXCEPTION
   BEGIN
         SETSTOP=1;
         INSERTINTO db_logs(log_type,table_name,action_name,log_msg,create_time)
         SELECT2, &#39;oal_xxx&#39;,&#39;pro_oal_log_move&#39;,CONCAT(&#39;primary key:&#39;,p_oalid,&#39; 移动执行失败&#39;),NOW();
   END; 
   
   OPEN cur_oalid;

          -- 讀取一行資料到變數 

這個就是判斷是否遊標已經到達了最後

  

FETCH cur_oalid INTO p_oalid;

     --    進行資料遷移

 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;

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