From: | Zdenek Kotala <Zdenek(dot)Kotala(at)Sun(dot)COM> |
---|---|
To: | Neil Conway <neilc(at)samurai(dot)com> |
Cc: | pgsql-hackers(at)postgresql(dot)org |
Subject: | Re: Integer datetimes |
Date: | 2007-05-05 16:42:20 |
Message-ID: | 463CB3EC.4060707@sun.com |
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Thread: | |
Lists: | pgsql-hackers |
Neil Conway wrote:
> So, are there any corresponding benefits to providing both FP and
> integer datetimes? AFAIK the following differences in user-visible
> behavior exist:
>
There should be also problem with floating point implementation on
client and server side. For example if somebody use floating point
optimalization (-fast switch in Sun Studio) for server compilation and
client will be connected from another machine with standard floating
point behavior. Result could be wrong.
>
> P.S. One thing to verify is that the performance of integer datetimes is
> no worse than the perf. of FP datetimes. I'd intuitively expect this to
> be true, but it would be worth investigating.
Some multi core/thread CPUs has only one FPU (e.g. Niagara).
Zdenek
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