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:
Jun. 26, 2018
Filed:
Jun. 29, 2015
Oracle International Corporation, Redwood Shores, CA (US);
Srikanth Bondalapati, Belmont, CA (US);
Sankar Subramanian, Cupertino, CA (US);
Oracle International Corporation, Redwood Shores, CA (US);
Abstract
Techniques for query optimization for group-by extensions and distinct aggregate functions are provided. A query has an extended group-by clause with an extended group-by operator and a first set of group-by columns. The query has one or more distinct aggregate functions and one or more non-distinct aggregate functions. An initial subquery is constructed that generates a partially aggregated initial temporary (PAIT) table when executed. The initial subquery includes a GROUP BY clause with a second set of group-by columns that includes the first set of group-by columns of the extended group-by clause of the query and one or more columns specified by the one or more distinct aggregate functions. One or more subqueries are computed that compute groupings indicated by the extended group-by operator based on the PAIT table generated by the initial subquery.