From: | "Janko F(dot) Richter" <j(dot)richter(at)wallstreet-develop(dot)de> |
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To: | pgsql-bugs(at)postgresql(dot)org |
Subject: | Re: Bug #534: factorial function |
Date: | 2001-12-10 15:34:10 |
Message-ID: | 3C14D5F2.7090502@wallstreet-develop.de |
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Lists: | pgsql-bugs |
-------- Original Message --------
Subject: Re: [BUGS] Bug #534: factorial function
Date: Mon, 10 Dec 2001 13:28:15 +0100
From: "Janko F. Richter" <j(dot)richter(at)wallstreet-develop(dot)de>
To: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
References: <200112101121(dot)fBABLgI23940(at)candle(dot)pha(dot)pa(dot)us>
Hallo Bruce,
Bruce Momjian wrote:
> Yep, 0! sure looks like a bug. We will fix it in 7.3. Not sure about
> the double precision. Comments?
Perhaps a good idea is to implement the Gamma function additional
to factorial function. The gamma function as general function of
factorial accepts float/double values as argument and returns double.
Maybe a good idea too is to implement a set of standard statistical
functions for instance normal, poisson, binomial, etc to get less range
overflow while using statistical functions.
Perhaps when I'll have time, I will try to write a set of this functions
as contrib next year.
Thank you and regards ,
Janko
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