FreeTDS Development Group

["Castellano, Nicholas" <Nicholas_Castellano AT acml.com>]

Thanks, I will check out cs_config().  I don't think it really changes much,
because the message numbers are still going to be different from those used
in DB-Library.

In fact, the changes I made should make it easier to get this right, since
we can generate all the appropriate messages in one place.  Previously, lots
of conversion error conditions were simply returning TDS_FAIL; at least in
the DB-Library case those are now all returning appropriate codes which
result in the right messages being generated within dbconvert().  So overall
it looks like this was a useful exercise, even if it still needs more work.

Cheers,
--nick

-----Original Message-----
From: bounce-freetds-145195 AT franklin.oit.unc.edu
[mailto:bounce-freetds-145195 AT franklin.oit.unc.edu] 
Sent: Wednesday, September 25, 2002 2:13 AM
To: TDS Development Group
Subject: [freetds] RE: Changing return codes from tds_convert()


Nick,

> However, my experimentation with cs_convert() in Sybase's CT-Lib shows 
> that the client message callback is never invoked

I had a quick look at this. The "ct-lib" convert routine is cs_convert(),
and is actually part of "cs-lib". I Haven't ever really got my head round
this distinction, but suffice to say, it seems that cs-library has its own
error message handling/callback , which is distinct from ct-library. More
complications!  
Perhaps, you had neglected to set up a cs-library message callback, in which
case, as the manual states:

"If a message callback is not installed and inline message handling is not
enabled, CS-Library discards message information." I don't know if this
changes anything WRT your proposals for tds_convert(). I suspect not. I just
hope we don't have to install another message handling routine. 
Oh no, I've just checked and we do. it seems that cs-library callbacks are
set up using cs_config(), which is, ahem, unimplemented in freetds as yet. 
Aren't you the king of error handling now Nick ? :-) 
Bill


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