无限级分类(非递归算法/存储过程版/GUID主键)完整数据库示例_(3)删除记录

-- =============================
-- Author:  <杨俊明,[email protected] or [email protected]>
-- Description: <无限级分类_删除分类>
-- Return     : 0删除正常,-1父类下还有子类
-- ===========================
Alter PROCEDURE [dbo].[up_Class_DeleteEx]
 @clsId uniqueidentifier, --要删除的分类
 @withChild bit     --是否级联删除子类
AS
BEGIN
 SET NOCOUNT ON;
 Declare @so_MaxOrders int;
 Declare @s_Childs int;
 Declare @clsType Nvarchar(50);
 Declare @O_RootId int;
 
 Select @O_RootId = F_RootId,@clsType = F_Type From T_Class where F_ID=@clsId;

 If (@WithChild=1)  
  begin
   Select @so_maxOrders=max(F_orders) From T_class Where F_ID=@clsId or F_ParentIdStr like '%' + Convert(varchar(50),@clsId) + '%'; --得到自身系的最大排序号
   Select @s_Childs= Count(F_ID) from t_Class Where F_ID=@clsId or F_ParentIdStr like '%' + Convert(varchar(50),@clsId) + '%';
   Delete from T_Class where ','+F_parentIdStr+',' like '%' + convert(varchar(100),@clsId) + '%'
   Delete from T_Class Where F_Id=@ClsId 
   Update T_Class Set F_Orders = F_Orders - @s_childs where F_Type=@clsType And F_RootId=@O_RootId And F_Orders > @so_maxOrders;
   return 0
  end
 else  
  --如果不级联删除，又有子节点，则返回-1 
  If exists(select F_id from T_Class where ',' + F_parentIdStr + ',' like '%' + convert(varchar(100),@clsId) + '%')  
   return -1
  else
   begin
    Select @so_maxOrders=max(F_orders) From T_class Where F_ID=@clsId or F_ParentIdStr like '%' + Convert(varchar(50),@clsId) + '%'; --得到自身系的最大排序号
    Select @s_Childs= 1;
    Delete from T_Class Where F_Id=@ClsId;
    Update T_Class Set F_Orders = F_Orders - @s_childs where F_Type=@clsType And F_RootId=@O_RootId And F_Orders > @so_maxOrders;
    return 0
   end
   
END