From: | David Fetter <david(at)fetter(dot)org> |
---|---|
To: | Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com> |
Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: float value is rounded |
Date: | 2009-11-26 00:32:04 |
Message-ID: | 20091126003204.GA13542@fetter.org |
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Thread: | |
Lists: | pgsql-hackers |
On Wed, Nov 25, 2009 at 07:46:11PM +0100, Pavel Stehule wrote:
> 2009/11/25 Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>:
> > Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com> writes:
> >> I was surprised with rounding relative not big value. Is it
> >> correct?
> >
> > You do realize float4 has only 6 decimal digits of precision?
> >
>
> To today I though so float4 is more practical :).
Floats have never been safe with respect to operations like =, and
won't become so.
Cheers,
David.
--
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