Re: XOR operator.

Jean-Luc Lachance <jllachan@nsd.ca>

From: Jean-Luc Lachance <jllachan@nsd.ca>
To: Stephan Szabo <sszabo@megazone23.bigpanda.com>
Cc: Joshua Moore-Oliva <josh@chatgris.com>, pgsql-general@postgresql.org
Date: 2003-03-29T21:00:02Z
Lists: pgsql-general
AFAICR

A xor B = ( A and not B) or ( not A and B)

It is a pain to write, but you can always:

CREATE FUNCTION XOR( boolean, boolean) 
RETURNS boolean as '
RETURN ( $1 and not $2) or ( not $1 and $2);
' LANGUAGE 'plpgsql';



Stephan Szabo wrote:
> 
> On Fri, 28 Mar 2003, Joshua Moore-Oliva wrote:
> 
> > Does postgresql support the xor operator?
> 
> You can get bitwise/binary xor (of bitstrings and integers) with the #
> operator AFAICS.
> 
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