Re: Arbitrary precision modulo operation

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От Bruno Wolff III
Тема Re: Arbitrary precision modulo operation
Дата
Msg-id 20040426174226.GE18684@wolff.to
обсуждение исходный текст
Ответ на Arbitrary precision modulo operation  (Chadwick Boggs <chadwickboggs@yahoo.com>)
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On Mon, Apr 26, 2004 at 13:30:17 -0400,
  Chadwick Boggs <chadwickboggs@yahoo.com> wrote:
> Example of wrong results from modulo operation of arbitrary precision
> numbers:
>
> # select '123456789012345678901234567890'::numeric % 123;
> ?column?
> ----------
>       -6
> (1 row)
>
> # select mod('123456789012345678901234567890'::numeric, 123);
> mod
> -----
>  -6
> (1 row)
>
> The correct result (at least according to another, unnamed, RDBMS):
>
> > select '123456789012345678901234567890' % 123;
> +----------------------------------------+
> | '123456789012345678901234567890' % 123 |
> +----------------------------------------+
> |                                     58 |
> +----------------------------------------+
> 1 row in set (0.00 sec)

I checked this with bc and I got -6 (and 117) as being correct. I would
think the other database was wrong.

It wouldn't happen to be MYSQL would it?

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