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. 31, 2020
Filed:
Jul. 09, 2015
Oracle International Corporation, Redwood Shores, CA (US);
Arjun K. Sirohi, Bellevue, WA (US);
Dillip K. Praharaj, San Ramon, CA (US);
Oracle International Corporation, Redwood Shores, CA (US);
Abstract
Context-sensitive index visibility is used to reduce the number databases indexes that are considered and evaluated as an access path by query optimization. For a database statement that references or otherwise requires access to a set of database tables for which a DBMS defines a set of database indexes, context-sensitive index visibility limits the selection of database indexes. A query context comprises query context attributes, each of which is associated with a requested execution of a database statement. Query context attributes dictate whether a database index can be considered for query optimization. An example of a query context attribute is database user of a database session in which a database statement is issued. According to an embodiment of the present invention, a query context attribute is a session attribute stored as part of a session state of a database session.