一种云计算环境下的XML查询数据服务的优化方法

摘要

Providing XML data service in could environment attracts more and more attentions.By introducing existed XQuery engine (such as saxon) into cloud environment,a XML data query service framework was implemented.To improve the efficiency of XML data query in cloud environment,an optimization method based of XPath projection is applied in the procedure of splitting XML data,only leaving the data related to XQuery statements.Experiments show that the optimization method effectively reduces both the data size and the query processing time of XML data service.%在云计算环境中提供数据服务逐渐成为研究热点.在云计算环境中结合已有XQuery查询处理引擎,实现了云计算环境中XML数据查询服务.为提高云计算环境中XML数据查询效率,采用基于XPath投影的方法预先对XML分块处理,仅保留与XQuery语句相关的数据.实验表明,该方法有效缩小了数据分块的规模,缩短了XML数据服务的查询处理时间.