On Wed, 2005-05-25 at 13:09 +0200, Sebastian Böck wrote:
> Dawid Kuroczko wrote:
>
> >
> > Be wary of the NULL values though. :) Either don't use them, add
> > something like 'AND (text1 <> NEW.text1 OR text1 IS NULL OR NEW.text1
> > IS NULL)' or something more complicated. :)
>
> Thanks for the notice, but I have a special operator for this:
>
> CREATE OR REPLACE FUNCTION different (ANYELEMENT, ANYELEMENT) RETURNS
and then there is the 'IS DISTINCT FROM' construct
http://www.postgresql.org/docs/8.0/static/functions-comparison.html#AEN6094
gnari