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. 19, 2002
Filed:
Oct. 13, 1998
William M. Wagstaff, Saratoga, CA (US);
Donovan A. Schneider, San Francisco, CA (US);
Galt Johnson, San Francisco, CA (US);
Jeffrey A. Byard, San Jose, CA (US);
David L. Morandi, Palo Alto, CA (US);
Phillip M. Fernandez, Palo Alto, CA (US);
Arunachalam Balachandran, Pune, IN;
International Business Machines Corporation, Armonk, NY (US);
Abstract
Hybrid target indexes are employed for skewed data set domains. Such hybrid indexes contain multiple value representations within a given index. The representations can be optimized for particular keys in highly skewed data set domains. For example, a hybrid target index on customer states might employ a bitmap to represent the index value for a California key and also employ, in the same index, an uncompressed list of row-IDs to represent the index value for a Delaware key.