Evaluating Contained Rewritings for XPath Queries on Materialized Views

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Title Evaluating Contained Rewritings for XPath Queries on Materialized Views
Author Zhou, Rui; Liu, Chengfei; Li, Jianxin; Wang, Junhu; Liu, Jixue
Journal Name Lecture Notes in Computer Science
Year Published 2011
Place of publication Germany
Publisher Springer-Verlag
Abstract In this paper, we study the problem how to efficiently evaluate a set of contained rewritings on materialized views. Previous works focused on how to find a set of contained rewritings given a view and a query, but did not address how to evaluate the rewritings on materialized views. To evaluate a potential exponential number of contained rewritings, we design two algorithms, a basic algorithm and an optimized algorithm. Both algorithms are built on the observation that the exponential number of contained rewritings are actually composed by a linear number of component patterns. In the optimized algorithm, we further design four important pruning rules and several heuristic rules that can effectively reduce the number of component patterns we need to evaluate. The experiments demonstrate the efficiency of our algorithms.
Peer Reviewed Yes
Published Yes
Alternative URI http://dx.doi.org/10.1007/978-3-642-20149-3_35
Volume 6587
Page from 481
Page to 495
ISSN 0302-9743
Date Accessioned 2012-01-12; 2012-02-15T04:54:47Z
Date Available 2012-02-15T04:54:47Z
Research Centre Institute for Integrated and Intelligent Systems
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Database Management
URI http://hdl.handle.net/10072/42731
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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