Date: Thu, 4 Mar 2004 16:03:52 +0100 (CET)
From: Gergely Czuczy <phoemix@harmless.hu>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: pgsql-interfaces <pgsql-interfaces@postgresql.org>
Subject: Re: libpq PQexecPrepared returns NULL 
In-Reply-To: <25614.1078412346@sss.pgh.pa.us>
Message-ID: <Pine.LNX.4.44.0403041602100.69-100000@localhost>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII

hello

the strange thing is -- what i've forgot to mention -- is that
PQerrorMessage returns an empty string, so from this i don't know the
source of the error.

how can I check if it is _really_ out of memory?
i have 1G RAM in the box, and shm values are set:
kernel.shmmax = 536870912
kernel.shmall = 536870912

Bye,

Gergely Czuczy
mailto: phoemix@harmless.hu
PGP: http://phoemix.harmless.hu/phoemix.pgp

The point is, that geeks are not necessarily the outcasts
society often believes they are. The fact is that society
isn't cool enough to be included in our activities.

On Thu, 4 Mar 2004, Tom Lane wrote:

> Gergely Czuczy <phoemix@harmless.hu> writes:
> > i've got a very strange problem, PQexecPrepared returns NULL, but if i
> > immadietly rerun the query it will run normally, returning the query
> > result. what can be the problem, and how could I track it down, solve it?
>
> Check PQerrorMessage().
>
> AFAIR the only reasons for a null result (instead of a possibly-error
> PGresult) would be out-of-memory or connection failure.
>
> 			regards, tom lane
>