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:
Aug. 05, 2008
Filed:
Feb. 28, 2005
John David Dietel, Rochester, MN (US);
John David Dietel, Rochester, MN (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Methods, apparatuses, and computer program products for materialized query table matching are provided that include receiving a database query, retrieving a materialized query table (MQT) from data storage accessible to a database management system, selecting a join in the materialized query table between a table that is not invoked by the query and a table that is invoked in the query, determining whether the selected join is lossless, and expanding the query to include the lossless join if the selected join is lossless, expanding the query to include the lossless join. Determining whether the selected join is lossless may be carried out by losslessly joining the table that is not invoked by the query to the query, and determining whether the lossless join to the query matches the selected join of the materialized query table.