The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 13, 2009
Filed:
Apr. 03, 2006
Vincent Corvinelli, Mississauga, CA;
Yuri Deigin, Richmond Hill, CA;
John F. Hornibrook, Markham, CA;
Tam Minh Dai Tran, San Jose, CA (US);
Vincent Corvinelli, Mississauga, CA;
Yuri Deigin, Richmond Hill, CA;
John F. Hornibrook, Markham, CA;
Tam Minh Dai Tran, San Jose, CA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method and system for estimating cardinalities for a plurality of columns in a database system is disclosed. The method and system include obtaining statistics collected for the plurality of columns. A first portion of the statistics indicates at least one relationship between at least a portion of the plurality of columns, while a second portion of the statistics includes single column statistics. The method and system also include utilizing the first portion and the second portion of the statistics to estimate the cardinality for the plurality of columns.