| From: | Claudio Freire <klaussfreire(at)gmail(dot)com> |
|---|---|
| To: | Greg Stark <stark(at)mit(dot)edu> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, Noah Misch <noah(at)leadboat(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Peter Geoghegan <pg(at)heroku(dot)com>, Thom Brown <thom(at)linux(dot)com>, Heikki Linnakangas <hlinnakangas(at)vmware(dot)com>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: B-Tree support function number 3 (strxfrm() optimization) |
| Date: | 2014-04-04 21:23:49 |
| Message-ID: | CAGTBQpaQwEYgjs=Ob4n_MKSndyQ5fNX1+SNc6_SVCL1C+HQXgQ@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Fri, Apr 4, 2014 at 5:29 PM, Greg Stark <stark(at)mit(dot)edu> wrote:
> Two questions I have:
>
> 1) Would it make more sense to use a floating point instead of an integer? I
> saw a need for a function like this when I was looking into doing GPU sorts.
> But GPUs expect floating point values.
In the context of this patch, I don't think you want to add
uncertainty to the != 0 or ==0 case (which is what FP would do).
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