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:
Mar. 20, 2012
Filed:
May. 15, 2008
Paul R. Day, Rochester, MN (US);
Randy L. Egan, Rochester, MN (US);
Roger A. Mittelstadt, Byron, MN (US);
Paul R. Day, Rochester, MN (US);
Randy L. Egan, Rochester, MN (US);
Roger A. Mittelstadt, Byron, MN (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method, apparatus and program product that determine a density for each key value of a plurality of key values in a table over at least one range of rows in the database table, and store the determined densities in a data structure for use in optimizing a query that references a key value in the plurality of key values in the table. By doing so, the density of various key values may be determined and dynamically maintained, often resulting in optimization data for improved query optimization.