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Erschienen in:
2005 | OriginalPaper | Buchkapitel
Prune XML Before You Search It: XML Transformations for Query Optimization
verfasst von : Stéphane Bressan, Zoé Lacroix, Ying Guang Li, Anna Maddalena
Erschienen in: Current Trends in Database Technology - EDBT 2004 Workshops
Verlag: Springer Berlin Heidelberg
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In this paper, we present a query optimization approach for XML document management environments loosely-coupled with the storage system. Our technique is based on two main steps: first, based on the query, input documents are transformed, by pruning parts that are irrelevant with respect to the query; then the query is executed on the pruned documents. An index structure is also provided to further optimize the pruning process. Experimental results show that, by using our pruning strategy, query execution time can be significantly reduced.