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How would I write this stored procedure?

Bruce Gust
Bruce Gust asked
on
238 Views
Last Modified: 2014-03-07
Here's my current stored procedure:

USE [BIProd]
GO
/****** Object:  StoredProcedure [dbo].[cer_CapxUpdateTemp]    Script Date: 3/7/2014 10:07:11 AM ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO

ALTER PROCEDURE [dbo].[cer_CapxUpdateTemp] --Parms for stored procedure
            @cercapxid as int,
            @allocatedamount as int
      AS
      BEGIN
            declare @key as int
            declare @ErrorMessage as varchar(300)
            declare @ErrorNo as int
            set @ErrorMessage = ''
            set @ErrorNo = 0

      
                  Update cer_CapX set allocatedamount = @allocatedamount
                  where cercapxid = @cercapxid
                  set @ErrorNo = @@Error
                  if @ErrorNo <> 0
                  begin
                        set @key = 0
                        set @ErrorMessage = 'Failed to update the record (' + cast(@ErrorNo as varchar) + '}'
end

The crux of the proc being

Update cer_CapX set allocatedamount = @allocatedamount
where cercapxid = @cercapxid

Here's my challenge:

I've got look out for allocated amounts that are great than what's actually been budgeted. I have access to that info which is located in the "totalcost" column of the very table I'm updating.

Here's where I'm a pig on rollerskates. How do I check to see if my user's allocated amount is greater than the total cost, and if so, how do I update that amount to the total cost value, rather than what they've inputted AND still update the other rows where the data is acceptable (meaning the amount allocated is either equal to or less than the total cost value)?

I'm thinking the logic would look something like this:

update cer_Capx set allocatedamount =
//rather than @allocatedamount, I would need to do a select statement / comparison
select allocatedamount as original_allocatedamount, totalcost as original_totalcost from cer_Capx where cercapxid=@cercapxid

if (@allocatedamount>original_totalcost)
@allocatedamount = original_allocatedamount;
else
@allocatedamount = @allocatedamount;
where cercapxid=@cercapxid...

But how do I code that correctly?


      
            
            
            select @key as ID, @ErrorMessage as ErrorMessage
            
      END
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