Re: [PATCH] Provide rowcount for utility SELECTs

Peter Eisentraut <peter_e@gmx.net>

From: Peter Eisentraut <peter_e@gmx.net>

To: Tom Lane <tgl@sss.pgh.pa.us>

Cc: Boszormenyi Zoltan <zb@cybertec.at>, Hans-Juergen Schoenig <hs@cybertec.at>, Pavel Stehule <pavel.stehule@gmail.com>, PostgreSQL-development <pgsql-hackers@postgresql.org>

Date: 2009-12-28T16:14:04Z

Lists: pgsql-hackers

On mån, 2009-12-28 at 11:08 -0500, Tom Lane wrote:
> Boszormenyi Zoltan <zb@cybertec.at> writes:
> > Hans-Juergen Schoenig írta:
> >> just as a background info: this will have some positive side effects
> >> on embedded C programs which should be portable.
> 
> > Not just embedded C programs, every driver that's
> > based on libpq and used PQcmdTuples() will
> > automatically see the benefit.
> 
> And, by the same token, the scope for possibly breaking clients is nearly
> unlimited ...

Why is that?  Are there programs out there that expect PQcmdTuples() to
return something that is *not* the tuple count for these commands and
will violently misbehave otherwise?