Re: Postgresql odbc and Visual studio 2005 .net 2.0

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From: Leendert Paul Diterwich [mailto:paulditerwich(at)gmail(dot)com]
Sent: 23 November 2005 16:53
To: pgsql-odbc(at)postgresql(dot)org
Cc: Dave Page
Subject: Postgresql odbc and Visual studio 2005 .net 2.0

Hi all,

I just got word from MS and this is what they said about the
problems some of us are experiencing:

Hi Paul,

It appears that there are problems with this particular ODBC
driver. It tells us that the default catalog is "\0\0" (taken from the
IDbConnection.Database property) so we pass this as a catalog
restriction to enumerate tables. This works, however the rows returned
provide a catalog of NULL. This is inconsistent behavior, and when we
then ask our cache to select objects with the catalog restriction "\0\0"
it finds none because all objects in the cache have a NULL catalog.

There is no workaround for this issue, unfortunately. The only
solution is for the ODBC driver to be fixed.

Thanks,
Stephen Provine
VS Data Development Team

Is it possible to change the behavior of the ODBC driver?

Certainly, if we can track down the actual bug. The problem is, afaik,
there is no way to ask an ODBC driver what the default catalog is, so
I'm not sure where they're getting this info from. If they're actually
querying the /current/ catalog immediately following a connect, then
they're using SQLGetConnectAttr, in which I have just commited a fix
which meant that the wrong result length was returned. That could
conceivably have caused this problem.

I can email a couple of DLL's to test if you like?

Regards, Dave.