X-Original-To: pgsql-sql-postgresql.org@localhost.postgresql.org
Received: from localhost (unknown [200.46.204.144])
	by svr1.postgresql.org (Postfix) with ESMTP id C749052943
	for <pgsql-sql-postgresql.org@localhost.postgresql.org>;
	Thu, 16 Jun 2005 09:47:26 -0300 (ADT)
Received: from svr1.postgresql.org ([200.46.204.71])
	by localhost (av.hub.org [200.46.204.144]) (amavisd-new, port 10024)
	with ESMTP id 34410-08
	for <pgsql-sql-postgresql.org@localhost.postgresql.org>;
	Thu, 16 Jun 2005 12:47:16 +0000 (GMT)
Received: from tigger.fuhr.org (tigger.fuhr.org [63.214.45.158])
	by svr1.postgresql.org (Postfix) with ESMTP id F0991528AA
	for <pgsql-sql@postgresql.org>; Thu, 16 Jun 2005 09:47:15 -0300 (ADT)
Received: from winnie.fuhr.org (winnie.fuhr.org [10.1.0.1])
	by tigger.fuhr.org (8.13.3/8.13.3) with ESMTP id j5GCl8oC068494
	(version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK);
	Thu, 16 Jun 2005 06:47:11 -0600 (MDT)
	(envelope-from mfuhr@winnie.fuhr.org)
Received: from winnie.fuhr.org (localhost [127.0.0.1])
	by winnie.fuhr.org (8.13.3/8.13.3) with ESMTP id j5GCl8ss065664;
	Thu, 16 Jun 2005 06:47:08 -0600 (MDT)
	(envelope-from mfuhr@winnie.fuhr.org)
Received: (from mfuhr@localhost)
	by winnie.fuhr.org (8.13.3/8.13.3/Submit) id j5GCl8SI065663;
	Thu, 16 Jun 2005 06:47:08 -0600 (MDT) (envelope-from mfuhr)
Date: Thu, 16 Jun 2005 06:47:08 -0600
From: Michael Fuhr <mike@fuhr.org>
To: "M.D.G. Lange" <mlange@dltmedia.nl>
Cc: pgsql-sql@postgresql.org
Subject: Re: Function does not return, but gives error..
Message-ID: <20050616124708.GA65633@winnie.fuhr.org>
References: <42B16FFF.8050009@dltmedia.nl>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <42B16FFF.8050009@dltmedia.nl>
X-Virus-Scanned: by amavisd-new at hub.org
X-Spam-Status: No, hits=0.108 tagged_above=0 required=5 tests=AWL,
	UPPERCASE_25_50
X-Spam-Level: 
X-Archive-Number: 200506/188
X-Sequence-Number: 21789

On Thu, Jun 16, 2005 at 02:26:39PM +0200, M.D.G. Lange wrote:
>
> IF groupres = NULL
> THEN
> ...
> END IF;
> is not trapped...

Be sure to understand how NULL works in comparisons:

http://www.postgresql.org/docs/8.0/static/functions-comparison.html

SELECT NULL = NULL;
 ?column? 
----------
 
(1 row)

SELECT (NULL = NULL) IS TRUE;
 ?column? 
----------
 f
(1 row)

SELECT (NULL = NULL) IS FALSE;
 ?column? 
----------
 f
(1 row)

SELECT (NULL = NULL) IS NULL;
 ?column? 
----------
 t
(1 row)

-- 
Michael Fuhr
http://www.fuhr.org/~mfuhr/