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:
Jul. 16, 2002
Filed:
Jun. 14, 1999
Yao-Ching Stephen Chen, Saratoga, CA (US);
Fen-Ling Lin, San Jose, CA (US);
Jerry Mukai, San Jose, CA (US);
Hong Tie, San Jose, CA (US);
Yun Wang, Saratoga, CA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method, apparatus, and article of manufacture for analyzing a query and extending an access path selection for the query, in order to optimize joined table expressions and complex join operations in the query. The extension of the access path selection occurs in two phases: (1) an access path selection router analyzes and divides the query into portions, so that the overall access path selection is divided into smaller access path selections for processing by a join enumerator; and (2) the join enumerator is provided to handle joined table expressions and complex join operators, wherein the join enumerator can be continuously enhanced as more powerful query optimization techniques become available.