From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
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To: | Michael Paquier <michael(dot)paquier(at)gmail(dot)com> |
Cc: | Andrew Gierth <andrew(at)tao11(dot)riddles(dot)org(dot)uk>, Pedro Gimeno <pgsql-004(at)personal(dot)formauri(dot)es>, rschaaf(at)commoninf(dot)com, pgsql-bugs(at)postgresql(dot)org |
Subject: | Re: Re: BUG #12885: The result of casting a double to an integer depends on the database version |
Date: | 2015-03-26 02:07:53 |
Message-ID: | 18005.1427335673@sss.pgh.pa.us |
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Michael Paquier <michael(dot)paquier(at)gmail(dot)com> writes:
> On Thu, Mar 26, 2015 at 9:19 AM, Andrew Gierth
> <andrew(at)tao11(dot)riddles(dot)org(dot)uk> wrote:
> "Tom" == Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> writes:
>>> Tom> BTW, if memory serves we also have a pretty lazy rounding
>>> Tom> implementation for the numeric datatype. I wonder if now would be
>>> Tom> a good time to upgrade that to be round-to-nearest-even as well.
>> A data point: there have been occasional complaints on IRC about the
>> fact that numeric rounding is not round-to-even, but obviously it's
>> harder to tell if anyone is relying on the current behavior.
> Tom, if there is a patch showing up soon, would you integrate it? I
> imagine that it would be good to have the same behavior for a maximum
> of datatypes in 9.5 now that src/port/rint.c is more compliant.
Yes, that's what I was thinking --- if we're changing this in 9.5 for
float (on Windows and whatever other platforms use rint.c) then it would
be sensible to fix numeric at the same time. I will commit a patch if
it shows up, but do not have time to write one myself.
regards, tom lane
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