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|Title:||Evaluation and selectivity estimation of XML queries||Authors:||LI HANYU||Keywords:||XML, Query, Evaluation, Selectivity, Estimation, Order||Issue Date:||24-May-2006||Citation:||LI HANYU (2006-05-24). Evaluation and selectivity estimation of XML queries. ScholarBank@NUS Repository.||Abstract:||With the fast-growing use of XML data on the Web, optimizing XML queries has become one of the most active and exciting research areas. In this thesis, we examine the problems of query evaluation and selectivity estimations of XML queries. First, we examine how path information in XML data can be utilized to speed up structural join. Next, we design a compact statistical method which extracts two highly summarized information for XML query selectivity estimation. Finally, we propose a solution to estimate the selectivity of XML queries with order-based axes. In summary, this thesis proposes techniques of query processing and query selectivity estimation for XML data. Through an extensive performance study, the proposed solutions are shown to be efficient and easy to implement, and should be helpful for subsequent research in XML query optimization.||URI:||http://scholarbank.nus.edu.sg/handle/10635/15373|
|Appears in Collections:||Ph.D Theses (Open)|
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