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:
Sep. 13, 2005
Filed:
Dec. 10, 2003
Lawrence H. Higa, Los Angeles, CA (US);
Paul L. Sinclair, Manhattan Beach, CA (US);
Mark William Sirek, San Diego, CA (US);
Kuorong Chiang, Cerritos, CA (US);
Lawrence H. Higa, Los Angeles, CA (US);
Paul L. Sinclair, Manhattan Beach, CA (US);
Mark William Sirek, San Diego, CA (US);
Kuorong Chiang, Cerritos, CA (US);
NCR Corporation, Dayton, OH (US);
Abstract
A method of performing a join includes identifying a join that identifies a first table and a second table. The first table includes a plurality of first table rows. Each of the plurality of first table rows are grouped into one of a plurality of first table partitions. The second table includes one or more second table rows. Each of the plurality of second table rows are grouped into one or more second table partitions. A determination is made as to whether the first table and the second table are joined on equality constraints. The one or more first table rows are joined with the one or more second table rows using a rowkey merge join where equality exists.