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JACIII Vol.10 No.3 pp. 270-280
doi: 10.20965/jaciii.2006.p0270
(2006)

Paper:

Semantic Query Optimization: Correctness and Control

Pongtawat Chippimolchai*, Kiyoshi Akama**, and Vilas Wuwongse*

*Computer Science and Information Management Program, Asian Institute of Technology, Km. 42, Paholyothin Highway, Klong Luang, Pathumthani 12120, Thailand

**Division of Large-Scale Computational Systems Information Initiative Center, Hokkaido University, Kita 11 Nishi 5, Kita-ku, Sapporo, Hokkaido 060-0811, Japan

Received:
February 22, 2005
Accepted:
December 21, 2005
Published:
May 20, 2006
Keywords:
semantic query optimization, deductive database, integrity constraint, equivalent transformation, semantic preservation
Abstract

We developed a semantic query optimization framework for deductive databases based on equivalent transformation (ET) rules. ET rules, prepared from the semantic knowledge of databases, such as integrity constraints, transform given queries into syntactically different but semantically equivalent and more efficient forms. We formally prove the correctness of query transformations by ET rules. For efficiency, we propose a two-phase heuristic-based strategy to guide query transformations and introduce a condition-based control strategy to prevent unwanted, unnecessary transformations. We give examples demonstrating the possible optimization.

Cite this article as:
Pongtawat Chippimolchai, Kiyoshi Akama, and Vilas Wuwongse, “Semantic Query Optimization: Correctness and Control,” J. Adv. Comput. Intell. Intell. Inform., Vol.10, No.3, pp. 270-280, 2006.
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References
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Last updated on Mar. 05, 2021