| From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
|---|---|
| To: | Luke Lonergan <llonergan(at)greenplum(dot)com> |
| Cc: | Victor Yegorov <viy(at)mits(dot)lv>, Jie Zhang <jzhang(at)greenplum(dot)com>, John Eshleman <jeshleman(at)greenplum(dot)com>, Postgres Patches <pgsql-patches(at)postgresql(dot)org> |
| Subject: | Re: Bitmap index AM |
| Date: | 2006-06-13 01:23:51 |
| Message-ID: | 200606130123.k5D1NpP01219@candle.pha.pa.us |
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| Lists: | pgsql-patches |
Luke Lonergan wrote:
> Bruce,
>
> We have a bitmap index AM in Bizgres (on PG 8.1.3) that is functional and
> achieves very worthwhile (10x+) performance and space objectives.
>
> It is a large patch, and introduces the access method along with modifying
> the appropriate executor nodes. The latter part was necessary because of
> the need to bypass the in-memory bitmap index when an on-disk bitmap is
> available.
>
> Because this patch is large, how do you suggest we go through review? Also,
> there is some further work that Jie is doing to support efficient
> multi-column indexes that will simplify the code, so we're not quite ready
> for patch submission.
Well, post a URL of the patch, and keep working on it. When it is
ready, let us know.
--
Bruce Momjian http://candle.pha.pa.us
EnterpriseDB http://www.enterprisedb.com
+ If your life is a hard drive, Christ can be your backup. +
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