Boots – shoes – and leggings
Patent
1996-03-14
1999-12-28
Amsbury, Wayne
Boots, shoes, and leggings
364DIG1, 3642821, 3642824, 3642834, G06F 1730
Patent
active
060092653
ABSTRACT:
The present invention provides a system and method for retrieving data from a computerized database system. Prior to execution of a query statement, the system determines an optimal sequential execution plan for the query statement. The optimal sequential execution plan is used to determine an optimal parallel execution plan. During the execution of the query, run time variables are used to determine whether to use the sequential execution plan without modification or a modification of the parallel execution plan.
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Hong et al, "Optimization of parallel query execution plans in SPRS", PROC of the First International Conference on Parallel and Distributed Information Systems, Dec. 4-6 1991, IEEE Computer Society Press 199, p. 218-225.
Graefe, "Volcano--an extensible and parallel query evaluation system", IEEE Transactions on Knowledge and Data Engineering, vol. 6, Iss: 1, p. 120-135, Feb. 1994.
Huang Daniel T.
Lin Eileen Tien
Wang Yun
Amsbury Wayne
Dawkins Marilyn Smith
International Business Machines - Corporation
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