RE: density calculation when histograms are involved
- From: "Baumgartel, Paul" <paul.baumgartel@xxxxxxxxxxxxxxxxx>
- To: alvaro.fernandez@xxxxxxxxx, exriscer@xxxxxxxxx, "oracle-l" <oracle-l@xxxxxxxxxxxxx>
- Date: Thu, 13 Sep 2007 14:52:35 -0400
Also consult Jonathan Lewis's book Cost-Based Oracle.
Paul Baumgartel
CREDIT SUISSE
Information Technology
Securities Processing Databases Americas
One Madison Avenue
New York, NY 10010
USA
Phone 212.538.1143
paul.baumgartel@xxxxxxxxxxxxxxxxx
www.credit-suisse.com
________________________________
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Alvaro Jose
Fernandez
Sent: Thursday, September 13, 2007 1:56 PM
To: exriscer@xxxxxxxxx; oracle-l
Subject: RE: density calculation when histograms are involved
Hi Cheng,
Recommend you to read:
1st: Wolfgang's
http://www.centrexcc.com/Histograms%20-%20Myths%20and%20Facts.pdf
2nd: Alberto Dell'Era "Join over Histograms" paper :
http://www.adellera.it/investigations/join_over_histograms/JoinOverHisto
grams.pdf (covering much more complex cases)
regards.
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