From: Michael Fuhr <mike@fuhr.org>
To: erkan kolemen <erkankolemen@yahoo.com>
Cc: pgsql-interfaces@postgresql.org
Subject: Re: PGExec returns error without any comment
Date: Thu, 28 Sep 2006 07:37:41 -0600
Message-ID: <20060928133741.GA15280@winnie.fuhr.org> (raw)
In-Reply-To: <20060928121611.21391.qmail@web58304.mail.re3.yahoo.com>
References: <20060928121611.21391.qmail@web58304.mail.re3.yahoo.com>
On Thu, Sep 28, 2006 at 05:16:10AM -0700, erkan kolemen wrote:
> res = PQexec(conn, "select * from lists;");
> if (PQresultStatus(res) != PGRES_COMMAND_OK)
You're checking for the wrong result status. Here are some excerpts
from the libpq documentation:
PGRES_COMMAND_OK
Successful completion of a command returning no data.
PGRES_TUPLES_OK
Successful completion of a command returning data (such as a SELECT
or SHOW).
Note that a SELECT command that happens to retrieve zero rows still
shows PGRES_TUPLES_OK. PGRES_COMMAND_OK is for commands that can
never return rows (INSERT, UPDATE, etc.).
--
Michael Fuhr
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To: pgsql-interfaces@postgresql.org
Cc: mike@fuhr.org, erkankolemen@yahoo.com
Subject: Re: PGExec returns error without any comment
In-Reply-To: <20060928133741.GA15280@winnie.fuhr.org>
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