Method and apparatus for parallel processing aggregates using in

Details Method and apparatus for parallel processing aggregates using in Method and apparatus for parallel processing aggregates using in

1997-01-08

1998-12-15

Lim, Krisna

395676, G06F 940

Patent

active

058505474

ABSTRACT:
The present invention performs parallel processing of aggregate functions in a computing system. Partitioned into multiple subsets of data and each of the multiple subsets of data is allocated to one of a plurality of processes. Intermediate aggregations are performed in parallel by the plurality of processes on each of the multiple subsets of data. Each intermediate aggregation yields at least one intermediate value, wherein the at least one intermediate value is represented in an internal type format. The intermediate values from each of the intermediate aggregations are merged into a final aggregation value.

REFERENCES:
patent: 5640554 (1997-06-01), Take
patent: 5671382 (1997-09-01), Shintani et al.
Avi Silberschalz; "Database System Concepts" 1986 by McGraw-Hill, Inc. pp. 270-274.
"Encapsulation of Parallelism In The Volcano Query Processing System", Goetz Graefe, University of Colorado, pp. 102-111, 1990.

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