From: | Merlin Moncure <mmoncure(at)gmail(dot)com> |
---|---|
To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Andrew Gierth <andrew(at)tao11(dot)riddles(dot)org(dot)uk>, Heikki Linnakangas <hlinnakangas(at)vmware(dot)com>, Atri Sharma <atri(dot)jiit(at)gmail(dot)com>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: WIP Patch for GROUPING SETS phase 1 |
Date: | 2014-08-22 21:36:39 |
Message-ID: | CAHyXU0x-961dSA9eYtf4DVs0aUVbH53PYoxCd_wFvY+3LX54XA@mail.gmail.com |
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On Fri, Aug 22, 2014 at 1:52 PM, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
> On Fri, Aug 22, 2014 at 2:02 PM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> https://www.youtube.com/watch?v=MT2gzzbyWpw
>
> At around 8 minutes, he shows utilization statistics for cube at
> around 1% across their install base. That's higher than I would have
> guessed, so, eh, shows what I know. In any case, I'm not so much
> advocating not caring at all as confining the level of caring to what
> can be done without moving the earth.
cube is a dependency for earthdistance and it's gotten some light
advocacy throughout the years as the 'way to do it'. I tried it
myself way back in the day and concluded a while back that the 'box'
type + gist was better than earthdistance for bounding box operations
-- it just seemed easier to understand and use. If you search the
archives you'll probably find a couple of examples of me suggesting as
such.
merlin
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