| From: | "Eugene Selkov Jr(dot)" <selkovjr(at)mcs(dot)anl(dot)gov> |
|---|---|
| To: | Dave Chapeskie <dchapes(at)ddm(dot)on(dot)ca> |
| Cc: | "Thomas G(dot) Lockhart" <lockhart(at)alumni(dot)caltech(dot)edu>, Postgres Hackers List <hackers(at)postgreSQL(dot)org> |
| Subject: | Re: [HACKERS] Automatic type conversion |
| Date: | 1998-05-10 08:07:56 |
| Message-ID: | 3555605C.FCB30834@mcs.anl.gov |
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| Lists: | pgsql-hackers |
Dave Chapeskie wrote:
>
> On Sun, May 10, 1998 at 12:14:11AM +0000, Thomas G. Lockhart wrote:
> > -- there isn't a floating point factorial operator...
> > tgl=> select (4.3 !);
> > ?column?
> > --------
> > 24
> > (1 row)
>
> Am I the only one that thinks the above is wrong? 4.3 factorial is
> mathematically undefined and does NOT equal 24.
Just put the gamma function in there and assume the argument is always a
float. A decent gamma function algorithm should make a special case for
integers.
--Gene
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