Re: Numeric version of factorial() - Mailing list pgsql-patches

From Bruce Momjian
Subject Re: Numeric version of factorial()
Date
Msg-id 200312010448.hB14m4016031@candle.pha.pa.us
Whole thread Raw
In response to Re: Numeric version of factorial()  (Gavin Sherry <swm@linuxworld.com.au>)
List pgsql-patches
Your patch has been added to the PostgreSQL unapplied patches list at:

    http://momjian.postgresql.org/cgi-bin/pgpatches

I will try to apply it within the next 48 hours.

---------------------------------------------------------------------------


Gavin Sherry wrote:
> On Thu, 31 Jul 2003, Tom Lane wrote:
>
> > Gavin Sherry <swm@linuxworld.com.au> writes:
> > > What are your feelings about numeric argument vs. int4/int8 arguments?
> >
> > Actually I think it'd be fine to take int8.  We'd not be able to cope
> > with any larger input anyway, and the inner loop could be noticeably
> > faster if the control logic just deals with int.
> >
> > We could leave the factorial(numeric) case open for a future
> > implementation that uses gamma, if anyone gets hot to do it.
> >
>
> Attached is a revised patch based on your Tom's comments. It removes
> int[248]fac(), modifies regression tests (which referenced int4fac()), and
> implements a much cleaned numeric_fac().
>
> >             regards, tom lane
> >
>
> Thanks,
>
> Gavin

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