XQuery语言查询优化策略研究  

XQuery Language Query Optimization Strategy

作　　者：吴君[1] 

机构地区：[1]湖北省公安消防总队司令部指挥中心,武汉430070

出　　处：《计算机与数字工程》2009年第10期182-185,共4页Computer & Digital Engineering

摘　　要：XQuery查询语言在XPath路径查询的基础上使用FLWR等表达式实现XML数据的复杂查询或重构。查询优化是查询处理中重要的组成部分。文章提出了两个优化策略:路径的关联优化和FLWOR查询的重写,XMark实验表明能有效提高XQuery查询的执行效率。On the base of XPath query expression,XQuery language adds many other expressions,such as FLWOR expression,to do complex query or reconstruction on XML data.XQuery optimization is important part of inquiry processing.This paper brings two strategies have been carried out for XQuery processing optimization： one is the relation s processing between XPath expressions,the other is the rewriting of simple FLWOR query.Experiment using Xmark prove that they can improve the excuting efficiency of XQuery.

关 键 词：XQUERY XPATH XMark 查询优化 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]