| From: | "David Johnston" <polobo(at)yahoo(dot)com> |
|---|---|
| To: | "'Robert Haas'" <robertmhaas(at)gmail(dot)com>, "'Peter Eisentraut'" <peter_e(at)gmx(dot)net> |
| Cc: | "'pgsql-hackers'" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: precision and scale functions for numeric |
| Date: | 2012-04-30 19:33:48 |
| Message-ID: | 014701cd2708$2aa01bd0$7fe05370$@yahoo.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
> -----Original Message-----
> From: pgsql-hackers-owner(at)postgresql(dot)org [mailto:pgsql-hackers-
> owner(at)postgresql(dot)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.
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