From: tomas@mamma.varadinet.de
To: Robert A. Knop Jr. <rknop@lilys.lbl.gov>
Cc: pgsql-interfaces@postgresql.org
Subject: Re: libpq & freeing character results
Date: Tue, 27 Jun 2000 22:20:49 +0200
Message-ID: <20000627222049.A32274@mail.aura.de> (raw)
In-Reply-To: <Pine.LNX.4.10.10006271204130.1921-100000@lilys.lbl.gov>
References: <Pine.LNX.4.10.10006271204130.1921-100000@lilys.lbl.gov>
On Tue, Jun 27, 2000 at 12:06:44PM -0700, Robert A. Knop Jr. wrote:
> If one uses libpq functions such as PQfname, should one free the returned
> character string?
>
[...]
> This is explicitly answered in the documentation for PQgetvalue (it's a
> pointer into the PGresult data), so I'm assuming thatt he same applies for
> PQfname. Please let me know if this is a foolish assumption.
>
It does correspond to the general style of the interface -- and peeking
into the implementation...
======================================================================
/*
returns NULL if the field_num is invalid
*/
char *
PQfname(PGresult *res, int field_num)
{
if (!check_field_number("PQfname", res, field_num))
return NULL;
if (res->attDescs)
return res->attDescs[field_num].name;
else
return NULL;
}
======================================================================
(from src/interfaces/libpq/fe-exec.c; it's version 6.5.3, but I don't
think it has changed) confirms the conjecture.
Regards
--
tomas
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To: pgsql-interfaces@postgresql.org
Cc: tomas@mamma.varadinet.de, rknop@lilys.lbl.gov
Subject: Re: libpq & freeing character results
In-Reply-To: <20000627222049.A32274@mail.aura.de>
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