Eliminating group-by operations in a join plan

Details Eliminating group-by operations in a join plan Eliminating group-by operations in a join plan

2006-06-13

2006-06-13

Mofiz, Apu M. (Department: 2165)

Data processing: database and file management or data structures

Database design

Data structure types

C707S793000

Reexamination Certificate

active

07062481

ABSTRACT:
A database system includes a storage that contains plural tables as well as a predefined data structure. The database system is able to, in response to a join query, perform a join of two or more tables. The database system also is able to determine, based on values contained in the predefined data structure, whether a group-by operation can be skipped.

REFERENCES:
patent: 6757677 (2004-06-01), Pham et al.
Weiping P. Yan et al., Performing Group-By Before Join, University of Waterloo 1993 archive, pp. 1-30.
Taniar et al., Parallel processing of “GroupBy-Before-Join” Queries in Cluster Architecture, IEEE, May 2001, pp. 178-185.

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