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. 25, 2013
Filed:
Jun. 07, 2011
Nikhil Teletia, Madison, WI (US);
Alan Dale Halverson, Verona, WI (US);
José A. Blakeley, Redmond, WA (US);
Milind Madhukar Joshi, Redmond, WA (US);
Jose Aguilar Saborit, Dana Point, CA (US);
Nikhil Teletia, Madison, WI (US);
Alan Dale Halverson, Verona, WI (US);
José A. Blakeley, Redmond, WA (US);
Milind Madhukar Joshi, Redmond, WA (US);
Jose Aguilar Saborit, Dana Point, CA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
The present invention extends to methods, systems, and computer program products for performing parallel joins on distributed database data. Embodiments of the invention include a phased semi-join reduction strategy using replication and shuffle operations to join a first and a second data source. A filter building phase uses replication and pushes down a 'Distinct' (e.g., SQL) operator to produce a list of join keys for the first data source (one side of the join). A shuffle phase for the second data source is modified to join to the key list produced in the first phase as a row filtering mechanism. A join phase then joins the first and second data sources.