CREATE PROCEDURE dbo.ProductListUpdateSpecialList @ProductId_Array varChar(800), @ModuleId int AS DECLARE @PointerPrev int DECLARE @PointerCurr int DECLARE @TId int Set @PointerPrev=1 set @PointerCurr=1
begin transaction Set NoCount ON delete from ProductListSpecial where ModuleId=@ModuleId
Set @PointerCurr=CharIndex(",",@ProductId_Array,@PointerPrev+1) set @TId=cast(SUBSTRING(@ProductId_Array,@PointerPrev,@PointerCurr-@PointerPrev) as int) Insert into ProductListSpecial (ModuleId,ProductId) Values(@ModuleId,@TId) SET @PointerPrev = @PointerCurr while (@PointerPrev+1 < LEN(@ProductId_Array)) Begin Set @PointerCurr=CharIndex(",",@ProductId_Array,@PointerPrev+1) if(@PointerCurr>0) Begin set @TId=cast(SUBSTRING(@ProductId_Array,@PointerPrev+1,@PointerCurr-@PointerPrev-1) as int) Insert into ProductListSpecial (ModuleId,ProductId) Values(@ModuleId,@TId) SET @PointerPrev = @PointerCurr End else Break End
set @TId=cast(SUBSTRING(@ProductId_Array,@PointerPrev+1,LEN(@ProductId_Array)-@PointerPrev) as int) Insert into ProductListSpecial (ModuleId,ProductId) Values(@ModuleId,@TId) Set NoCount OFF if @@error=0 begin commit transaction end else begin rollback transaction end GO
网友Bizlogic对此的改进方法:
应该用SQL2000 OpenXML更简单,效率更高,代码更可读:
CREATE Procedure [dbo].[ProductListUpdateSpecialList] ( @ProductId_Array NVARCHAR(2000), @ModuleId INT )
AS
delete from ProductListSpecial where ModuleId=@ModuleId
-- If empty, return IF (@ProductId_Array IS NULL OR LEN(LTRIM(RTRIM(@ProductId_Array))) = 0) RETURN
Insert into ProductListSpecial (ModuleId,ProductId) Select @ModuleId,C.[ProductId] FROM OPENXML(@idoc, "/Products/Product", 3) with (ProductId int ) as C where C.[ProductId] is not null