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. 08, 2006
Filed:
Nov. 25, 2003
Ruiping LI, San Jose, CA (US);
Irene Ching-hua Liu, San Jose, CA (US);
Lee-chin Hsu Liu, San Jose, CA (US);
Guogen Zhang, San Jose, CA (US);
Ruiping Li, San Jose, CA (US);
Irene Ching-Hua Liu, San Jose, CA (US);
Lee-Chin Hsu Liu, San Jose, CA (US);
Guogen Zhang, San Jose, CA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A heuristic approach is used to order materialized view (MW) candidates in a list based on descending order of their reduction power. A query (e.g., SQL query) is then matched with the MVs in the list order, wherein searching is stopped when matching has been found. The query is matched with materialized views in the ordered list by identifying a materialized view candidate as follows: identifying an MV that is not locked by a REFRESH process; identifying a matching MV that does not require a regroup; identifying a matching MV that does not require a rejoin; identifying a matching MV that does not require a residual join; or identifying an MV with largest reduction power from the list of candidates.