Re: [HACKERS] pow support for pgbench

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От Robert Haas
Тема Re: [HACKERS] pow support for pgbench
Дата
Msg-id CA+TgmoZiJbu6_ENKNfvRNDs-oDKN7EXyWB3c-RA8g2yD-3pzzA@mail.gmail.com
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Ответ на Re: [HACKERS] pow support for pgbench  (Raúl Marín Rodríguez <rmrodriguez@carto.com>)
Ответы Re: [HACKERS] pow support for pgbench  (Fabien COELHO <coelho@cri.ensmp.fr>)
Список pgsql-hackers
On Tue, Dec 5, 2017 at 7:44 AM, Raúl Marín Rodríguez
<rmrodriguez@carto.com> wrote:
> I've been giving a thought about this and I think we could reach the
> compromise
> of having a single function with 2 overloads:
> * pow(double, double) -> double: Uses C pow().
> * pow(int, int) -> double: Uses ipow() for positive exponents, and pow()
> for negative exponents.
>
> In both cases we'd return a double but we use the fast ipow if it's possible
> (which can be 20x faster), so at the cost of an extra cast if you need an
> int,
> we'd have a consistent API. Would this be acceptable?

It seems OK to me.

--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company


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