mysql過程遊標

DELIMITER $$

DROP PROCEDURE IF EXISTS `heli`.`prodtest` $$

CREATE PROCEDURE `heli`.`prodtest` ()
BEGIN

  /*局部變量的定義 declare*/
  declare pid varchar(45) default '';
  declare pq int default 0;
  declare pk double default 0.0;

  declare cur1 CURSOR FOR SELECT product_id,product_quantity,product_kg FROM productstock;

  /* 遊標異常後設置pid爲NULL */
  declare CONTINUE HANDLER FOR SQLSTATE '02000' SET pid = null;

  /*開遊標*/
     OPEN cur1;

        FETCH cur1 INTO pid,pq,pk;

        WHILE (pid is not null) DO
            /* dosomething */
            select pid,pq,pk;

 

            FETCH cur1 INTO pid,pq,pk;
        END WHILE;

     CLOSE cur1;

END $$

DELIMITER ;