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Date: Wed, 16 Oct 2002 08:03:43 -0700 (PDT)
From: Stephan Szabo <sszabo@megazone23.bigpanda.com>
To: Albrecht Berger <berger1517@gmx.ch>
Cc: pgsql <pgsql-sql@postgresql.org>
Subject: Re: replace null with 0 in subselect ?
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On Wed, 16 Oct 2002, Albrecht Berger wrote:

> Hello,
> I have a statement like this :
>
> INSERT INTO tab1 (c1, c2, c3) VALUES (1,2, SELECT MAX(pos)+1 FROM tab2);

Coalesce is your friend. :)

Coalesce((select max(pos)+1 from tab2), 0)
should work.