Optimization of Multi-Way Join Queries for Parallel Execution.
Hongjun Lu, Ming-Chien Shan, Kian-Lee Tan:
Optimization of Multi-Way Join Queries for Parallel Execution.
VLDB 1991: 549-560@inproceedings{DBLP:conf/vldb/LuST91,
author = {Hongjun Lu and
Ming-Chien Shan and
Kian-Lee Tan},
editor = {Guy M. Lohman and
Am\'{\i}lcar Sernadas and
Rafael Camps},
title = {Optimization of Multi-Way Join Queries for Parallel Execution},
booktitle = {17th International Conference on Very Large Data Bases, September
3-6, 1991, Barcelona, Catalonia, Spain, Proceedings},
publisher = {Morgan Kaufmann},
year = {1991},
isbn = {1-55860-150-3},
pages = {549-560},
ee = {db/conf/vldb/LuST91.html},
crossref = {DBLP:conf/vldb/91},
bibsource = {DBLP, http://dblp.uni-trier.de}
}
BibTeX
Abstract
Most of the existing relational database query optimizers generate multi-way join plans only from those linear ones to reduce the optimization overhead.
For multiprocessor computer systems, this strategy seems inadequate since it may reduce the search space too much to generate near-optimal plans.
In this paper we present a framework for optimization of multi- way join queries in multiprocessor computer systems.
The optimization process not only determines the order and method in which eachjoin should be performed, but also determines the number of joins should be executed in parallel, and the number of processors should be allocated to each join.
The preliminary performance study shows that the optimizer usually generate optimal or near-optimal plans when the number of joins is relatively small.
Even when the number of joins increases, the algorithm still gives reasonably good performance.
Furthermore, the optimization overhead is much lesser compared to exhaustive search.
Copyright © 1991 by the VLDB Endowment.
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is by the permission of the Very Large Data Base
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BibTeX
Printed Edition
Guy M. Lohman, Amílcar Sernadas, Rafael Camps (Eds.):
17th International Conference on Very Large Data Bases, September 3-6, 1991, Barcelona, Catalonia, Spain, Proceedings.
Morgan Kaufmann 1991, ISBN 1-55860-150-3
BibTeX
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Parallel Optimization of Large Join Queries with Set Operators and Aggregates in a Parallel Environment Supporting Pipeline.
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Optimization of Parallel Execution for Multi-Join Queries.
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BibTeX
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