| From: | David Fetter <david(at)fetter(dot)org> |
|---|---|
| To: | Josh Berkus <josh(at)agliodbs(dot)com> |
| Cc: | pgsql-advocacy(at)postgresql(dot)org |
| Subject: | Re: KNN-GiST and Informix |
| Date: | 2011-06-11 15:09:04 |
| Message-ID: | 20110611150904.GA11438@fetter.org |
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| Thread: | |
| Lists: | pgsql-advocacy |
On Thu, Jun 09, 2011 at 02:46:54PM -0700, Josh Berkus wrote:
> All,
>
> At pgCon, Tim Child pointed out that Informix had some kind of
> indexed "near()" function back in 1999. Does anyone know how this
> was implemented? Is it acutually the first implementation of KNN?
The document below talks about functions for doing this:
> And if so, does DB2 have it now?
Unsure. I did a quick search and only found Informix references for
it. They're using R-Trees, so our method, which doesn't, could be a
differentiator.
Cheers,
David.
--
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