Re: BUG #2211: select (1::float-1::float)*(-1) = -0 ??

On 1/25/06, Tiago D. J. <tiago(at)mdtestudio(dot)com(dot)br> wrote:
>
> The following bug has been logged online:
>
> Bug reference: 2211
> Logged by: Tiago D. J.
> Email address: tiago(at)mdtestudio(dot)com(dot)br
> PostgreSQL version: 8.1
> Operating system: Slackware 10.2
> Description: select (1::float-1::float)*(-1) = -0 ??
> Details:
>
> Hi people,
> I think that anything * 0, or 0*anything should be zero.
> But run this query :
> select (1::float-1::float)*(-1)
>
> it returns -0
>
> Sorry, my english is so poor,
> I hope that i'm helping you with this information.
>
> Tiago
>

pruebas=# select version();
version

------------------------------------------------------------------------------------------
PostgreSQL 8.1.1 on i686-pc-mingw32, compiled by GCC gcc.exe (GCC)
3.4.2 (mingw-special)
(1 fila)

pruebas=# select (1::float-1::float)*(-1);
?column?
----------
0
(1 fila)

This is good for me... maybe a bug already fixed?

--
regards,
Jaime Casanova
(DBA: DataBase Aniquilator ;)