> -----Original Message-----
> From: pgsql-hackers-owner@postgresql.org [mailto:pgsql-hackers-
> owner@postgresql.org] On Behalf Of Robert Haas
> Sent: Monday, April 30, 2012 2:20 PM
> To: Peter Eisentraut
> Cc: pgsql-hackers
> Subject: Re: [HACKERS] precision and scale functions for numeric
>
>
> I think you could test for integer-ness by testing whether val % 0 = 0.
>
Either I am missing something here or you are. Since Modulus is a division
function anything "% 0" results in a division-by-zero ERROR - division has
to occur before a remainder can be obtained.
Maybe "val % 2 NOT IN (0,1)" ...
David J.