Re: Absolute value of intervals

From: Sam Mason <sam(at)samason(dot)me(dot)uk>
To: pgsql-general(at)postgresql(dot)org
Subject: Re: Absolute value of intervals
Date: 2009-10-27 14:49:44
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On Tue, Oct 27, 2009 at 11:27:17AM -0300, Joshua Berry wrote:
> I couldn't find the operator '@' for intervals

A simple SQL implementation would look like:

CREATE FUNCTION absinterval(interval) RETURNS interval
IMMUTABLE LANGUAGE sql AS 'SELECT greatest($1,-$1)';
CREATE OPERATOR @ ( PROCEDURE = absinterval, RIGHTARG = interval );

or is a C version really needed?


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