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. 17, 2002
Filed:
Dec. 28, 1998
Randall Bello, Hampton, NH (US);
James Finnerty, Lexington, MA (US);
Mohamed Ziauddin, Fremont, CA (US);
Andrew Witkowski, Foster City, CA (US);
Oracle Corporation, Redwood Shores, CA (US);
Abstract
A method and system is provided for processing queries. Specifically, techniques are provided for handling a query that does not reference a particular materialized view, where the query requires access to values from a particular column not contained in the materialized view. A technique is also provided for processing a query that does not reference a particular materialized aggregate view, where the materialized aggregate view specifies an outer join between a child table and a parent table and the query specifies a particular type of join between the child table and the parent table, where the particular type of join is one of an inner join, an anti-join and a semi-join. The query is rewritten to produce a rewritten query that accesses the materialized aggregate view to produce data required by the query. A technique is also provided for processing a query that does not reference a particular materialized view and that specifies that results are to be grouped by a first set of one or more columns, where the materialized view reflects data that is grouped by a second set of one or more columns. If each column in the first set of columns either exactly matches a column in the second set of columns, is functionally dependent on another column in the first set of columns, or is functionally dependent on a column in the second set of columns, then the query is rewritten to produce a rewritten query that references the materialized view.