From: Jie Zhang <jzhang@greenplum.com>
To: pgsql-hackers@postgresql.org
Subject: On-disk bitmap index patch
Date: Mon, 17 Jul 2006 23:28:29 -0700
Message-ID: <C0E1CD9D.8DC0%jzhang@greenplum.com> (raw)
In-Reply-To: <000401c6a92c$622a5b66$6a01a8c0@valehousing.co.uk>
Hi,
I have posted a patch to the CVS head for on-disk bitmap index to
pgsql-patches. If this can get in 8.2, that would be great. Any comments and
suggestions are welcome.
I still need to add several items:
(1) README file in src/backend/access/bitmap.
(2) Bitmap index documentation.
(3) Hiding the internal btree.
Also, I have disabled the multi-column index support because there is a
known problem. Assume that there is a bitmap index on a and b. When a query
predicate has only a, the current code may generate a wrong result. That's
because the current code assumes that b is null. The ultimate problem is
because the search code only handles one bitmap vector now. I need a fix to
support manipulating multiple bitmap vectors.
If you find any other problems, please let me know.
Thanks,
Jie
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To: pgsql-hackers@postgresql.org
Cc: jzhang@greenplum.com
Subject: Re: On-disk bitmap index patch
In-Reply-To: <C0E1CD9D.8DC0%jzhang@greenplum.com>
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