| From: | Martijn van Oosterhout <kleptog(at)svana(dot)org> |
|---|---|
| To: | Hannu Krosing <hannu(at)skype(dot)net> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Alvaro Herrera <alvherre(at)commandprompt(dot)com>, "Jim C(dot) Nasby" <jim(at)nasby(dot)net>, Warren Turkal <wt(at)penguintechs(dot)org>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: RFC: Temporal Extensions for PostgreSQL |
| Date: | 2007-02-18 20:02:16 |
| Message-ID: | 20070218200216.GC6828@svana.org |
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| Lists: | pgsql-hackers |
On Sun, Feb 18, 2007 at 08:14:00PM +0200, Hannu Krosing wrote:
> > but I can promise you you can't make it work with btree.
>
> Sorry to hear that. btree seemed like the best candidate for doing it.
The problem with btree is that it's designed to work with a compare
function which compares two datums and returns greater than, equal to
or less than. You can't build such an operator for intervals, so
there's a problem.
However, if you decree that a zero return value mean "collision for the
purposes of a unique index" then you could probably make it work.
*However* using it for lookups probably won't work very well then...
Have a nice day,
--
Martijn van Oosterhout <kleptog(at)svana(dot)org> http://svana.org/kleptog/
> From each according to his ability. To each according to his ability to litigate.
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