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RPE Query Processing and Optimization Techniques for XML Databases 认领 引用 被引量：7
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作者 Guo-RenWang BingSun Jian-HuaLv GeYu 《Journal of Computer Science & Technology》 SCIE EI 2004年第2期224-237,共14页
An extent join to compute path expressions containing parent-children andancestor-descendent operations and two path expression optimization rules, path-shortening andpath-complementing, are presented in this paper. P... An extent join to compute path expressions containing parent-children andancestor-descendent operations and two path expression optimization rules, path-shortening andpath-complementing, are presented in this paper. Path-shortening reduces the number of joins byshortening the path while path-complementing optimizes the path execution by using an equivalentcomplementary path expression to compute the original one. Experimental results show that thealgorithms proposed are more efficient than traditional algorithms. 展开更多
关键词 XML regular path expressions query processing and optimization
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