From: | Bruce Momjian <bruce(at)momjian(dot)us> |
---|---|
To: | Greg Stark <gsstark(at)mit(dot)edu> |
Cc: | Simon Riggs <simon(at)2ndquadrant(dot)com>, pgsql-hackers(at)postgresql(dot)org |
Subject: | Re: Comments on Exclusion Constraints and related datatypes |
Date: | 2010-06-03 01:45:24 |
Message-ID: | 201006030145.o531jO812865@momjian.us |
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Lists: | pgsql-hackers |
Greg Stark wrote:
> On Mon, Mar 22, 2010 at 1:15 PM, Simon Riggs <simon(at)2ndquadrant(dot)com> wrote:
> >
> > * Circles, Boxes and other geometric datatypes defined "overlaps" to
> > include touching shapes. So
> >
> > * inet datatypes don't have a commutative operator on which a unique
> > index can be built. There is no "overlaps" equivalent, which again is a
> > shame because that stops them being used with the new feature.
>
> I think our unusual data types are one of the strong points of
> Postgres but they're missing a lot of operators and opclasses to make
> them really useful.
>
> There's no reason we couldn't have separate overlaps and
> overlaps-internally operators just like we have <=,>= and <,>. And it
> would be nice to flesh out the network data type more fully, perhaps
> merging in as much of ip4r as makes sense.
Added to TODO:
Add overlaps geometric operators that ignore point overlaps
* http://archives.postgresql.org/pgsql-hackers/2010-03/msg00861.php
--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com
+ None of us is going to be here forever. +
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