| From: | Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com> |
|---|---|
| To: | Dean Rasheed <dean(dot)a(dot)rasheed(at)gmail(dot)com>, Juan José Santamaría Flecha <juanjo(dot)santamaria(at)gmail(dot)com> |
| Cc: | 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: | 2020-06-16 11:18:54 |
| Message-ID: | 7095d570-f564-6c42-fe3b-65ca37b4b9a7@2ndquadrant.com |
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| Lists: | pgsql-hackers |
On 2020-06-16 11:49, Dean Rasheed wrote:
> With [1], we could return 'Infinity', which would be more correct from
> a mathematical point of view, and might be preferable to erroring-out
> in some contexts.
But the limit of the gamma function is either negative or positive
infinity, depending on from what side you come, so we can't just return
one of those two.
--
Peter Eisentraut http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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