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Structural Semi-Join Operators for Efficient Path Processing in XML Databases  

Son, Seok-Hyun (건국대학교 신기술융합학과)
Shin, Hyo-Seop (건국대학교 신기술융합학과)
Publication Information
Journal of KIISE:Computing Practices and Letters / v.16, no.2, 2010 , pp. 252-256 More about this Journal
Abstract
The structural join is one of core operators for efficient processing of XML queries. It can be mainly used for path-represented XML queries as it efficiently retrieves the node pairs that form a hierarchical relationship (i.e., ancestor-descendant, Parent-child relationship) among large-scale XML nodes. However, the structural join algorithms still suffer potential overhead in the middle of processing of XML path queries. In addressing this problem, the structural semi-join is proposed as a novel operator that retrieves only the ancestor or descendant nodes as join results for efficient processing. In this paper, we describe the algorithms for the structural semi-join and present the methods of XML path processing based on the structural semi-join algorithms. The experimental results show that the structural semi-join algorithms are very efficient in processing XML path processing.
Keywords
XML; Structural Join; Structural Semi-Join; XML path processing;
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