Re: Bug #534: factorial function

Yep, 0! sure looks like a bug. We will fix it in 7.3. Not sure about
the double precision. Comments?

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

> Janko Richter (j(dot)richter(at)wallstreet-develop(dot)de) reports a bug with a severity of 3
> The lower the number the more severe it is.
>
> Short Description
> factorial function
>
> Long Description
> 1. The factorial function returns 0 when the argument is 0. The factorial Funtion is defined as: factorial(0)=1
>
> 2. It would be better to define a factorial function returning double precision. The factorial function returning bigint produces false values with arguments larger then 20.
>
> Notice: I'm using the factorial function for statistical functions (for example poisson distribution)
>
> Thank you.
>
>
> Sample Code
> test=# select factorial(0);
> factorial
> -----------
> 0
> (1 row)
>
> janko=# select factorial(21::bigint);
> factorial
> ----------------------
> -4249290049419214848
> (1 row)
>
>
>
>
> No file was uploaded with this report
>
>
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