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:
Aug. 17, 2010
Filed:
Feb. 16, 2005
Benoit Dageville, Foster City, CA (US);
Bhaskar Ghosh, Burlingame, CA (US);
Rushan Chen, Belmont, CA (US);
Thierry Cruanes, Foster City, CA (US);
Mohamed Zait, San Jose, CA (US);
Benoit Dageville, Foster City, CA (US);
Bhaskar Ghosh, Burlingame, CA (US);
Rushan Chen, Belmont, CA (US);
Thierry Cruanes, Foster City, CA (US);
Mohamed Zait, San Jose, CA (US);
Oracle International Corporation, Redwood Shores, CA (US);
Abstract
Techniques are provided for performing a parallel aggregation operation on data that resides in a container, such as a relational table. During generation of the execution plan for the operation, it is determined whether partition-wise aggregation should be performed, based on the grouping keys involved in the aggregation and the partition keys used to partition the container. If partition-wise aggregation is to be performed, then the assignments given to the slave processes that are assigned to scan a container are made on a partition-wise basis. The scan slaves themselves may perform full or partial aggregation (depending on whether they are the only scan slaves assigned to the partition). If the scan slaves perform no aggregation, or only partial aggregation, then the scan slaves redistribute the data items to aggregation slaves that are local to the scan slaves.