Method for calculating distributed joins in main memory with...

Details Method for calculating distributed joins in main memory with... Method for calculating distributed joins in main memory with...

2004-12-20

2011-10-25

Timblin, Robert (Department: 2167)

Data processing: database and file management or data structures

Database and file access

Record, file, and data search and comparisons

Reexamination Certificate

active

08046377

ABSTRACT:
A method of executing a distributed join query for a set of documents includes communication between a first server and a second server. In the first server, a first tuple list is generated from a first list of documents matching a precondition part of the query. A first set of value identifiers of attributes associated with the first list of documents is extracted from the first tuple list. A first set of dictionary keys is generated from the set of value identifiers. Then, the first set of dictionary keys is sent with a join condition attribute to a second server. In the second server, the first set of value identifiers is converted to a second set of value identifiers of attributes associated with the second server based on the set of dictionary keys. Then, a lookup of documents is performed based on the second set of value identifiers.

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‘Chris Holmes Online’ [online]. Chris Holmes Online [retrieved on Oct. 2, 2007]. Retrieved from the Internet: <URL: http://www.chrisholmesonline.com/2007/02/03/surrogate-key-primary-key>.

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