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:
Jun. 27, 2000
Filed:
Feb. 28, 1997
Cetin Ozbutun, San Carlos, CA (US);
Michael Depledge, San Jose, CA (US);
Hakan Jakobsson, San Francisco, CA (US);
Mark Kremer, Sunnyvale, CA (US);
Jeffrey I Cohen, Sunnyvale, CA (US);
Quoc Tai Tran, Redwood Shores, CA (US);
Alexander C Ho, Belmont, CA (US);
Oracle Corporation, Redwood Shores, CA (US);
Abstract
A method and apparatus for generating and using bitmaps in a database system that employs multi-level identifiers is provided. The generated bitmaps include bits that correspond to the identifiers that have been assigned to existing records, as well as bits that correspond to all intervening multi-level identifiers that have not yet been assigned. Therefore, when new rows are inserted into the table associated with the bitmap, new bits do not have to be inserted into the existing bitmap. When existing rows are deleted, the bits that correspond to the deleted rows are not themselves deleted, but are simply set to a value that indicates that the corresponding row does not satisfy the criteria associated with the bitmap.