| From: | Juan José Santamaría Flecha <juanjo(dot)santamaria(at)gmail(dot)com> |
|---|---|
| To: | Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com> |
| Cc: | Dean Rasheed <dean(dot)a(dot)rasheed(at)gmail(dot)com>, Bruce Momjian <bruce(at)momjian(dot)us>, Ashutosh Bapat <ashutosh(dot)bapat(at)2ndquadrant(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: factorial of negative numbers |
| Date: | 2020-06-18 07:43:54 |
| Message-ID: | CAC+AXB1AFZRYXL+qNdyJjYPEwZ01nUMij7wg2soKAcsBqDO3yA@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Thu, Jun 18, 2020 at 9:13 AM Peter Eisentraut <
peter(dot)eisentraut(at)2ndquadrant(dot)com> wrote:
> On 2020-06-16 14:17, Dean Rasheed wrote:
> > I think you're probably right though. Raising an out-of-range error
> > seems like the best option.
>
> committed as proposed then
>
The gamma function from math.h returns a NaN for negative integer values,
the postgres factorial function returns a numeric, which allows NaN.
Raising an out-of-range error seems only reasonable for an integer output.
Regards,
Juan José Santamaría Flecha
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