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Re: SSE2008: #Tables, Stored Procedures, Avoiding ActiveX

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Gene Wirchenko (genew@ocis.net) writes:
>      It is not multiple errors.  It is multiple rows of error data
> being returned.  Preliminarily, it is an error message row followed by
> zero or more rows of inculpated column names.  e.g.
>           OrderBy  ErrorResponse
>              0     Foo must be less than bar.
>              1     foo
>              2     bar
> 0 is the error message to be emitted.  1 and 2 are the involved
> columns from which the front-end will select the first one in the form
> tab sequence to set the focus to.
 
There are of course error checks that belongs in the database, because
they work with the data. This does not the least apply to update procedures.

However, I would recommend that you don't overdo it. T-SQL is not a very
good language from a general programming perspective. Earlier this day
I was battling how to formulate an error message that for a while read
like:

   Column(s) [a] exists only in the left table, but they are not at the end

While the message can apply to multiple columns, I expect that most commonly
there will be only one, so the bad grammar will hurts the eye. Had I written
this code in Perl I might have crafted a message that was correct both
for singular and plural, but in T-SQL the code for that would be just too 
verbose, and I eventually I found a way to convey the message that did
not depend on verb inflection.

I think I've written something like you have in mind about once in my 
career. And that was in SQL 2000 with no TRY-CATCH. With TRY-CATCH it 
becomes even more difficult to produce multiple error message. Unless
you return them as result sets, but then you need a clear protocol so
that your client knows what result set gets back.

Something I've used a little more often is when I have had a table with 
rows that needs to be processed, and each row is processed independently, or 
at least there are groups of rows that are independent of each other.
In such cases, I put a status column and a message column in the table
where I write error status and message.
-- 
Erland Sommarskog, SQL Server MVP, esquel@sommarskog.se

Links for SQL Server Books Online:
SQL 2008: http://msdn.microsoft.com/en-us/sqlserver/cc514207.aspx
SQL 2005: http://msdn.microsoft.com/en-us/sqlserver/bb895970.aspx

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SSE2008: #Tables, Stored Procedures, Avoiding ActiveX Gene Wirchenko <genew@ocis.net> - 2012-07-30 19:37 -0700
  Re: SSE2008: #Tables, Stored Procedures, Avoiding ActiveX Gene Wirchenko <genew@ocis.net> - 2012-07-30 19:47 -0700
  Re: SSE2008: #Tables, Stored Procedures, Avoiding ActiveX Erland Sommarskog <esquel@sommarskog.se> - 2012-07-31 09:08 +0000
    Re: SSE2008: #Tables, Stored Procedures, Avoiding ActiveX Gene Wirchenko <genew@ocis.net> - 2012-07-31 09:26 -0700
      Re: SSE2008: #Tables, Stored Procedures, Avoiding ActiveX "Bob Barrows" <reb01501@NOyahooSPAM.com> - 2012-07-31 14:12 -0400
        Re: SSE2008: #Tables, Stored Procedures, Avoiding ActiveX Gene Wirchenko <genew@ocis.net> - 2012-07-31 15:02 -0700
          Re: SSE2008: #Tables, Stored Procedures, Avoiding ActiveX Erland Sommarskog <esquel@sommarskog.se> - 2012-08-01 21:04 +0200
      Re: SSE2008: #Tables, Stored Procedures, Avoiding ActiveX Erland Sommarskog <esquel@sommarskog.se> - 2012-07-31 21:45 +0200
        Re: SSE2008: #Tables, Stored Procedures, Avoiding ActiveX Gene Wirchenko <genew@ocis.net> - 2012-07-31 15:02 -0700
          Re: SSE2008: #Tables, Stored Procedures, Avoiding ActiveX Erland Sommarskog <esquel@sommarskog.se> - 2012-08-01 20:59 +0200
            Re: SSE2008: #Tables, Stored Procedures, Avoiding ActiveX Gene Wirchenko <genew@ocis.net> - 2012-08-01 13:30 -0700
              Re: SSE2008: #Tables, Stored Procedures, Avoiding ActiveX Erland Sommarskog <esquel@sommarskog.se> - 2012-08-01 23:27 +0200
  Re: SSE2008: #Tables, Stored Procedures, Avoiding ActiveX "Bob Barrows" <reb01501@NOyahooSPAM.com> - 2012-07-31 14:25 -0400
    Re: SSE2008: #Tables, Stored Procedures, Avoiding ActiveX Gene Wirchenko <genew@ocis.net> - 2012-07-31 15:02 -0700
      Re: SSE2008: #Tables, Stored Procedures, Avoiding ActiveX Jeroen Mostert <jmostert@xs4all.nl> - 2012-08-01 00:26 +0200
        Re: SSE2008: #Tables, Stored Procedures, Avoiding ActiveX Gene Wirchenko <genew@ocis.net> - 2012-07-31 17:43 -0700
          Re: SSE2008: #Tables, Stored Procedures, Avoiding ActiveX "Bob Barrows" <reb01501@NOSPAMyahoo.com> - 2012-08-01 06:29 -0400
            Re: SSE2008: #Tables, Stored Procedures, Avoiding ActiveX Jeroen Mostert <jmostert@xs4all.nl> - 2012-08-01 20:40 +0200
              Re: SSE2008: #Tables, Stored Procedures, Avoiding ActiveX Erland Sommarskog <esquel@sommarskog.se> - 2012-08-01 21:02 +0200
              Re: SSE2008: #Tables, Stored Procedures, Avoiding ActiveX "Bob Barrows" <reb01501@NOyahooSPAM.com> - 2012-08-01 16:02 -0400
          Re: SSE2008: #Tables, Stored Procedures, Avoiding ActiveX Jeroen Mostert <jmostert@xs4all.nl> - 2012-08-01 20:29 +0200
      Re: SSE2008: #Tables, Stored Procedures, Avoiding ActiveX Erland Sommarskog <esquel@sommarskog.se> - 2012-08-01 09:14 +0200
        Re: SSE2008: #Tables, Stored Procedures, Avoiding ActiveX Jason Keats <jkeats@melbpcDeleteThis.org.au> - 2012-08-04 18:14 +1000
          Re: SSE2008: #Tables, Stored Procedures, Avoiding ActiveX Erland Sommarskog <esquel@sommarskog.se> - 2012-08-04 21:15 +0200
            Re: SSE2008: #Tables, Stored Procedures, Avoiding ActiveX Jason Keats <jkeats@melbpcDeleteThis.org.au> - 2012-08-05 18:10 +1000
              Re: SSE2008: #Tables, Stored Procedures, Avoiding ActiveX Erland Sommarskog <esquel@sommarskog.se> - 2012-08-05 10:50 +0200
                Re: SSE2008: #Tables, Stored Procedures, Avoiding ActiveX Jason Keats <jkeats@melbpcDeleteThis.org.au> - 2012-08-06 00:03 +1000
                Re: SSE2008: #Tables, Stored Procedures, Avoiding ActiveX Erland Sommarskog <esquel@sommarskog.se> - 2012-08-05 20:21 +0200
                Re: SSE2008: #Tables, Stored Procedures, Avoiding ActiveX Jason Keats <jkeats@melbpcDeleteThis.org.au> - 2012-08-06 19:44 +1000
                Re: SSE2008: #Tables, Stored Procedures, Avoiding ActiveX Erland Sommarskog <esquel@sommarskog.se> - 2012-08-06 20:54 +0200

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