mysql 游标嵌套

BEGIN -- 开始存储过程
declare my_ID varchar(32); -- 线路id
declare my_SpecialLineName varchar(50); -- 线路名称
declare my_ParentID varchar(32); -- 父级id
declare BH varchar(32); -- 线路编号前缀
declare my_SpecialLineType varchar(50); -- 线路类型
declare my_LPID varchar(32); -- 站点父级id
declare my_Destination varchar(1024); -- 线路上级名称
declare Total_ids varchar(4000); -- 线路集合id
declare my_LID varchar(32); -- 站点id
declare my_ZD varchar(32); -- 站点
declare Total_id varchar(4000); -- 线路集合id
declare my_LPDestination varchar(1024); -- 站点父级
declare my_LSID varchar(32); -- 主表Id
DECLARE done INT DEFAULT FALSE; -- 自定义控制游标循环变量,默认false

DECLARE My_Cursor CURSOR FOR (SELECT ID,SpecialLineType,Destination FROM speciallinemanage WHERE ParentID = 0 AND Destination != "" AND (Destination NOT LIKE '%|%'));
DECLARE My_Cursor2 CURSOR FOR (SELECT ID,SpecialLineName,Destination FROM speciallinemanage WHERE ParentID = my_ID);
DECLARE My_Cursor3 CURSOR FOR (SELECT ZD FROM tmp_split);
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE; -- 绑定控制变量到游标,游标循环结束自动转true

OPEN My_Cursor; -- 打开游标
myLoop: LOOP -- 开始循环体,myLoop为自定义循环名,结束循环时用到
FETCH My_Cursor into my_ID,my_Destination,my_SpecialLineType; -- 将游标当前读取行的数据顺序赋予自定义变量12
IF done THEN -- 判断是否继续循环
LEAVE myLoop; -- 结束循环
END IF;
SET @my_LPID = (SELECT AreaId FROM area WHERE AreaName = my_Destination AND AreaType = my_SpecialLineType);
SET @Total_ids = (SELECT GROUP_CONCAT(AreaId SEPARATOR '-') FROM area WHERE AreaType = my_SpecialLineType);
OPEN My_Cursor2; -- 打开游标
myLoop2: LOOP -- 开始循环体,myLoop为自定义循环名,结束循环时用到
FETCH My_Cursor2 into my_LSID,my_SpecialLineName,my_LPDestination; -- 将游标当前读取行的数据顺序赋予自定义变量12
IF done THEN -- 判断是否继续循环
LEAVE myLoop2; -- 结束循环
END IF;
IF(my_SpecialLineType ='1') THEN
SET @BH = 'ZH' + (10000 + N'SELECT CAST('+ my_LSID + ' AS SIGNED))');
ELSEIF(my_SpecialLineType ='2') THEN
SET @BH = 'GN' + (10000 + N'SELECT CAST('+ my_LSID + ' AS SIGNED))');
ELSE
SET @BH = 'CJ' + (10000 + N'SELECT CAST('+ my_LSID + ' AS SIGNED))');
END IF;
CALL splitString(my_LPDestination,'|');
-- linesetup
SET @Total_id = N'SELECT REPLACE('+@Total_ids +',' +@my_LPID +','')';
INSERT INTO `go_travel`.`linesetup`
(`KID`, `LineNum`, `LineName`, `LineType`, `ProvinceId`, `ProvinceName`, `Extend4`)
VALUES
(my_ID, @BH, my_SpecialLineName, my_SpecialLineType, @my_LPID, my_Destination,@Total_id);
OPEN My_Cursor3; -- 打开游标
myLoop3: LOOP -- 开始循环体,myLoop为自定义循环名,结束循环时用到
FETCH My_Cursor3 into my_ZD;
IF done THEN -- 判断是否继续循环
LEAVE myLoop3; -- 结束循环
END IF;
-- line
SET @my_LID = (SELECT AreaId FROM area WHERE AreaName = my_ZD AND AreaType = my_SpecialLineType);

INSERT INTO `go_travel`.`line`
(`LineSetUpId`, `PlaceId`, `PlaceName`, `PPlaceId`, `PPlaceName`, `Sort`)
VALUES
(my_ID, @my_LID, my_ZD, @my_LPID, my_Destination, my_ID);

END LOOP; -- 结束自定义循环体
CLOSE My_Cursor3; -- 关闭游标
SET done=FALSE; #这个很重要
END LOOP; -- 结束自定义循环体
CLOSE My_Cursor3; -- 关闭游标
SET done=FALSE; #这个很重要
END LOOP; -- 结束自定义循环体
CLOSE My_Cursor; -- 关闭游标
END