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:
Jan. 16, 2018
Filed:
Feb. 18, 2014
Oracle International Corporation, Redwood Shores, CA (US);
Oracle International Corporation, Redwood Shores, CA (US);
Abstract
Methods, stored instructions, and computer systems are described for selecting an OR-expansion state of a query. A query processor accesses a certain query and a control parameter. The certain query comprises disjunctive predicates, and the control parameter indicates a certain procedure of a plurality of alternative stored procedures for expanding queries comprising disjunctive predicates into semantically equivalent candidate queries comprising combinations of subqueries. Based at least in part on the control parameter, the query processor selects the certain procedure to expand the certain query into one or more certain semantically equivalent candidate queries, each comprising a different combination of two or more subqueries. The query processor causes cost-based evaluation of subject queries, including the certain query and the one or more certain semantically equivalent candidate queries. The query processor then selects a query of the subject queries for execution or for further evaluation or transformation.