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:
Dec. 26, 2006
Filed:
Apr. 04, 2002
Gang Luo, Madison, WI (US);
Curt J. Ellmann, Madison, WI (US);
Jeffrey F. Naughton, Madison, WI (US);
Michael W. Watzke, Madison, WI (US);
Gang Luo, Madison, WI (US);
Curt J. Ellmann, Madison, WI (US);
Jeffrey F. Naughton, Madison, WI (US);
Michael W. Watzke, Madison, WI (US);
NCR Corp., Dayton, OH (US);
Abstract
A database system includes a locking mechanism for a materialized view defined on base relations. In response to updates of a base relation, a name lock is placed on the materialized view. The name lock is a type of exclusive lock and is associated with a data structure containing a first parameter to identify a base relation of the materialized view being updated, and a second parameter to indicate a number of transactions updating the base relation. With locking mechanisms according to some embodiments of the invention, transaction concurrency is enhanced by enabling concurrent updates of a materialized view by plural transactions in certain cases.