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:
Feb. 11, 2014
Filed:
Dec. 19, 2011
Zhen Hua Liu, San Mateo, CA (US);
Hui Joe Chang, San Jose, CA (US);
Balasubramanyam Sthanikam, Santa Clara, CA (US);
Zhen Hua Liu, San Mateo, CA (US);
Hui Joe Chang, San Jose, CA (US);
Balasubramanyam Sthanikam, Santa Clara, CA (US);
Oracle International Corporation, Redwood Shores, CA (US);
Abstract
The approaches described herein provide an efficient way to process certain kinds of queries that update XML data stored in an object-relational database. A query may include an XML query expression that conforms to a language for querying XML documents. A technique first determines whether the query contains an XML updating expression, and in response rewrites the query to comprise one or more path-based query operators that specify operations for updating XML data. The query may then be further rewritten to comprise one or more storage format specific query operators based on the particular database storage format associated with the XML data specified in the query. The rewritten query operators are used to generate a query execution plan that provides for several query execution optimizations.
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