From: | "Ross J(dot) Reedstrom" <reedstrm(at)wallace(dot)ece(dot)rice(dot)edu> |
---|---|
To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Cc: | pgsql-hackers(at)postgresql(dot)org |
Subject: | Selectivity estimates paper, and Mariposa |
Date: | 1999-08-02 20:26:41 |
Message-ID: | 19990802152641.A17371@wallace.ece.rice.edu |
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Lists: | pgsql-hackers |
On Mon, Aug 02, 1999 at 12:01:03AM -0400, Tom Lane wrote:
>
> Well, I'm more interested in putting my effort into making the system
> do the right thing without help. Manual overrides are OK as long as
> you remember to revisit the settings whenever anything changes ...
> otherwise your manual optimization can become manual pessimization ...
>
Hey Tom -
Ran across this paper, about an interesting approach, pulling in the indices
to aid in selectivity estimates.
http://db.cs.berkeley.edu/papers/CSD-98-1021.pdf
I grabbed this from a link at:
http://db.cs.berkeley.edu/papers/
while looking at the Mariposa work ( http://mariposa.cs.berkeley.edu)
from the Sequoia2000 project. I've convinced my team to let me spend
a couple days analyzing what it would take to fold the remote access
features of Mariposa into the current PostgreSQL tree. I grabbed the
alpha-1 code (June 23, 1996) which seems to be based on an early version
of Postgres95. Interesting to see all the academic cruft you guys have
already cleaned out ;-)
Ross
--
Ross J. Reedstrom, Ph.D., <reedstrm(at)rice(dot)edu>
NSBRI Research Scientist/Programmer
Computer and Information Technology Institute
Rice University, 6100 S. Main St., Houston, TX 77005
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