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Re: factorial of negative numbers - Mailing list pgsql-hackers

From Juan José Santamaría Flecha
Subject Re: factorial of negative numbers
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Msg-id CAC+AXB1AFZRYXL+qNdyJjYPEwZ01nUMij7wg2soKAcsBqDO3yA@mail.gmail.com
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In response to Re: factorial of negative numbers  (Peter Eisentraut <peter.eisentraut@2ndquadrant.com>)
Responses Re: factorial of negative numbers  (Peter Eisentraut <peter.eisentraut@2ndquadrant.com>)
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On Thu, Jun 18, 2020 at 9:13 AM Peter Eisentraut <peter.eisentraut@2ndquadrant.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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