| From: | Jean-Luc Lachance <jllachan(at)nsd(dot)ca> |
|---|---|
| To: | Stephan Szabo <sszabo(at)megazone23(dot)bigpanda(dot)com> |
| Cc: | Joshua Moore-Oliva <josh(at)chatgris(dot)com>, pgsql-general(at)postgresql(dot)org |
| Subject: | Re: XOR operator. |
| Date: | 2003-03-29 21:00:02 |
| Message-ID: | 3E860952.3F1058C6@nsd.ca |
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| Thread: | |
| 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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