Re: [HACKERS] Interval aggregate regression failure

Tom Lane wrote:
> Bruce Momjian <bruce(at)momjian(dot)us> writes:
> > Is this non-datetime integer only or both? I cannot reproduce the
> > failure here.
>
> On HPPA with float datetimes with today's code, Michael's case works
> but it took me less than two minutes to find one that doesn't:
>
> regression=# select interval '14 mon' * 8.2 as product_h;
> product_h
> ---------------------------------
> 9 years 6 mons 23 days 24:00:00
> (1 row)
>
> I reiterate my comment that this approach will never work; any small
> amount of experimentation will turn up cases that don't round correctly
> on one platform or another. Float arithmetic is inherently inexact.

Working on a new patch to round; will post.

--
Bruce Momjian bruce(at)momjian(dot)us
EnterpriseDB http://www.enterprisedb.com

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