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Static vs Dynamic Techniques for Selectivity Evaluation in Distributed Query Optimization

by Surbhi Bansal, Rajinder Singh Virk
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International Journal of Computer Applications
Foundation of Computer Science (FCS), NY, USA
Volume 96 - Number 25
Year of Publication: 2014
Authors: Surbhi Bansal, Rajinder Singh Virk
10.5120/16953-7057

Surbhi Bansal, Rajinder Singh Virk . Static vs Dynamic Techniques for Selectivity Evaluation in Distributed Query Optimization. International Journal of Computer Applications. 96, 25 ( June 2014), 42-47. DOI=10.5120/16953-7057

@article{ 10.5120/16953-7057,
author = { Surbhi Bansal, Rajinder Singh Virk },
title = { Static vs Dynamic Techniques for Selectivity Evaluation in Distributed Query Optimization },
journal = { International Journal of Computer Applications },
issue_date = { June 2014 },
volume = { 96 },
number = { 25 },
month = { June },
year = { 2014 },
issn = { 0975-8887 },
pages = { 42-47 },
numpages = {9},
url = { https://ijcaonline.org/archives/volume96/number25/16953-7057/ },
doi = { 10.5120/16953-7057 },
publisher = {Foundation of Computer Science (FCS), NY, USA},
address = {New York, USA}
}
%0 Journal Article
%1 2024-02-06T22:22:46.994743+05:30
%A Surbhi Bansal
%A Rajinder Singh Virk
%T Static vs Dynamic Techniques for Selectivity Evaluation in Distributed Query Optimization
%J International Journal of Computer Applications
%@ 0975-8887
%V 96
%N 25
%P 42-47
%D 2014
%I Foundation of Computer Science (FCS), NY, USA
Abstract

In distributed database query optimization, query optimizers have traditionally relied upon statically estimated table cardinalities when evaluating the cost of the query plans. This paper analyses static vs. dynamic calculation for selectivity of intermediate relations generated in query processing. The objective of this research is to overcome the disadvantages of previously formulated static methods which are relatively inaccurate in a distributed database environment. A Dynamic selectivity evaluation tool (DSET) has been proposed to optimize cost for a distributed database query processing environment. The results have shown that dynamic evaluation of selectivity factor of sub query operation is feasible and can significantly reduced the total query cost than its static estimation.

References
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Index Terms

Computer Science
Information Sciences

Keywords

Distributed database query optimization cardinality database statistics selectivity factor static Model DSET etc

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