US Patent 8150865 Techniques for coalescing subqueries

Patent 8150865 was granted and assigned to Oracle on April, 2012 by the United States Patent and Trademark Office.

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Patent

Patent attributes

Current Assignee

Oracle

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

8150865

Date of Patent

April 3, 2012

Patent Application Number

12182002

Date Filed

July 29, 2008

Patent Citations Received

‌

US Patent 11714810 Join-based containment for set operation-based sub query removal

Patent Primary Examiner

‌

Frantz Coby

Patent abstract

Methods for transforming queries that contain EXISTS and NOT EXISTS subqueries are provided. The methods provided transform original queries that contain EXISTS and/or NOT EXISTS subqueries in conjunctive or disjunctive combinations into transformed queries that coalesce the original EXISTS and/or NOT EXISTS subqueries into a reduced number of EXISTS and/or NOT EXISTS subqueries, thereby eliminating duplicative table accesses and join operations.

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