USP_DISCOUNTGLMAPPING_UPDATEFROMXML

            create procedure [dbo].[USP_DISCOUNTGLMAPPING_UPDATEFROMXML] 
            (
                @XML xml,
                @CHANGEAGENTID uniqueidentifier = null,
                @CHANGEDATE datetime = null
            )

            as

                set nocount on;

                if @CHANGEAGENTID is null
                    exec USP_CHANGEAGENT_GETORCREATECHANGEAGENT @CHANGEAGENTID output;

                if @CHANGEDATE is null 
                    set @CHANGEDATE = getdate();

                -- build a temporary table containing the values from the XML

                declare @TempTbl table (
                   [ACCOUNTNUMBER] nvarchar(100),
                   [ID] uniqueidentifier,
                   [PROJECTCODE] nvarchar(100))

                insert into @TempTbl select 
                    [ACCOUNTNUMBER],
                    [ID],
                    [PROJECTCODE] 
                from dbo.UFN_DISCOUNTGLMAPPING_GETMAPPING_FROMITEMLISTXML(@XML);

                update @TempTbl set ID = newid() where (ID is null) or (ID = '00000000-0000-0000-0000-000000000000');

                if @@Error <> 0
                    return 1;

                declare @contextCache varbinary(128);
                declare @e int;

                -- cache current context information 

                set @contextCache = CONTEXT_INFO();

                -- set CONTEXT_INFO to @CHANGEAGENTID 

                if not @CHANGEAGENTID is null
                    set CONTEXT_INFO @CHANGEAGENTID;                

                -- delete any items that no longer exist in the XML table

                delete from dbo.[DISCOUNTGLMAPPING] where [DISCOUNTGLMAPPING].ID in 
                    (select ID from dbo.UFN_DISCOUNTGLMAPPING_GETMAPPING()
                    EXCEPT select ID from @TempTbl)    

                select @e=@@error;

                -- reset CONTEXT_INFO to previous value 

                if not @contextCache is null
                    set CONTEXT_INFO @contextCache;

                if @e <> 0
                    return 2;

                -- update the items that exist in the XML table and the db

                update [DISCOUNTGLMAPPING]
                        set [DISCOUNTGLMAPPING].[ACCOUNTNUMBER]=temp.[ACCOUNTNUMBER],
                        [DISCOUNTGLMAPPING].[ID]=temp.[ID],
                        [DISCOUNTGLMAPPING].[PROJECTCODE]=temp.[PROJECTCODE],
                        [DISCOUNTGLMAPPING].CHANGEDBYID = @CHANGEAGENTID,
                        [DISCOUNTGLMAPPING].DATECHANGED = @CHANGEDATE

                    from dbo.[DISCOUNTGLMAPPING] inner join @TempTbl as temp on [DISCOUNTGLMAPPING].ID = temp.ID
                    where ([DISCOUNTGLMAPPING].[ACCOUNTNUMBER]<>temp.[ACCOUNTNUMBER]) or 
                        ([DISCOUNTGLMAPPING].[ACCOUNTNUMBER] is null and temp.[ACCOUNTNUMBER] is not null) or 
                        ([DISCOUNTGLMAPPING].[ACCOUNTNUMBER] is not null and temp.[ACCOUNTNUMBER] is null) or 
                        ([DISCOUNTGLMAPPING].[ID]<>temp.[ID]) or 
                        ([DISCOUNTGLMAPPING].[ID] is null and temp.[ID] is not null) or 
                        ([DISCOUNTGLMAPPING].[ID] is not null and temp.[ID] is null) or 
                        ([DISCOUNTGLMAPPING].[PROJECTCODE]<>temp.[PROJECTCODE]) or 
                        ([DISCOUNTGLMAPPING].[PROJECTCODE] is null and temp.[PROJECTCODE] is not null) or 
                        ([DISCOUNTGLMAPPING].[PROJECTCODE] is not null and temp.[PROJECTCODE] is null)


                    if @@Error <> 0
                        return 3;    

                    -- insert new items

                    insert into [DISCOUNTGLMAPPING]  
                        ([ACCOUNTNUMBER],
                        [ID],
                        [PROJECTCODE],                
                        ADDEDBYID, 
                        CHANGEDBYID, 
                        DATEADDED, 
                        DATECHANGED)
                    select 
                        [ACCOUNTNUMBER],
                        [ID],
                        [PROJECTCODE], 
                        @CHANGEAGENTID, 
                        @CHANGEAGENTID, 
                        @CHANGEDATE, 
                        @CHANGEDATE
                    from @TempTbl as temp
                    where not exists (select ID from dbo.[DISCOUNTGLMAPPING] as DATA where DATA.ID = TEMP.ID)

                    if @@Error <> 0
                        return 4;

                    return 0;