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:
Apr. 04, 1995
Filed:
May. 21, 1992
Gregory S Smith, Nashua, NH (US);
Sangam Pant, Nashua, NH (US);
Oracle Corporation, Redwood City, CA (US);
Abstract
Design of indexes in a relational database management system is based on a workload analysis of all requests in a system. Each request is assigned a value of importance, and requests are broken into expressions, contexts and columns to facilitate identification of candidate indexes. Candidate indexes are compared to existing indexes to determine whether the existing indexes can be reused or modified. Candidate indexes are classified as hashed or sorted. Based on the index design, record placement is selected to be hashed, sorted or by default. Related indexes and tables are clustered and the clusters are sized to fit file areas. Cache buffers are also defined.