#儲存過程
drop procedure if exists update_pointer;
CREATE PROCEDURE update_pointer(IN ckindId int)
BEGIN
  #定義變數
  DECLARE id int DEFAULT 0; #成績ID
  DECLARE score int DEFAULT 0; #成績
  DECLARE sellID int DEFAULT 0; #價格ID
  DECLARE pid int DEFAULT 0; #價格ID
  DECLARE upGrades int DEFAULT 0; #分數上限	
  DECLARE downGrade int DEFAULT 0; #分數下限
  DECLARE _done tinyint(1) DEFAULT 0; #是否未找到資料標記
  /* 定義游標 */
  DECLARE _Cur CURSOR FOR
  SELECT
    t_score.id,
    t_score.score,
    t_score.sellID
  FROM t_score
  WHERE t_score.kindId = ckindId; #使用者分數記錄查詢  
  DECLARE _Curprice CURSOR FOR
  SELECT
    t_priceinfo.id,
    t_priceinfo.`upGrade`,
    t_priceinfo.downGrade
  FROM t_priceinfo
  WHERE t_priceinfo.KindID = ckindId; #彩種價格查詢
  DECLARE CONTINUE HANDLER FOR SQLSTATE '02000' SET _done = 1; #錯誤定義，標記迴圈結束  

  /*開啟游標*/
  OPEN _Cur;
  /*迴圈執行*/
  FETCH _Cur INTO id, score, sellID; #獲取資料
  WHILE _done = 0 DO #當存在資料的時候進行迴圈
    OPEN _Curprice; #開啟遊標
    FETCH _Curprice INTO pid, upGrades, downGrade;
    WHILE _done = 0 DO
      IF score >= downGrade AND score < upGrades THEN
        UPDATE t_score
        SET t_score.sellID = pid
        WHERE t_score.id = id AND t_score.kindId=ckindId;
        SET _done=1;
      END IF;
      FETCH _Curprice INTO pid, upGrades, downGrade;
    END WHILE;
    CLOSE _Curprice; #關閉遊標 
    SET _done = 0;
    FETCH _Cur INTO id, score, sellID; #獲取資料
  END WHILE;
END;


#觸發器（Insert）
DROP Trigger if exists t_princeInsert_on_priceinfo;
create trigger t_princeInsert_on_priceinfo
after insert on t_priceinfo
for each row
begin
call update_pointer(NEW.kindID);
end;

#觸發器（Update）
DROP Trigger if exists t_princeUpdate_on_priceinfo;
create trigger t_princeUpdate_on_priceinfo
after update on t_priceinfo
for each row
begin
call update_pointer(NEW.kindID);
end;

#觸發器（Delete）
DROP Trigger if exists t_princeDelete_on_priceinfo;
create trigger t_princeDelete_on_priceinfo
after delete on t_priceinfo
for each row
begin
call update_pointer(OLD.kindID);
end;