摘要
提出了一种在Mediator-Wrapper结构中嵌入基于XQuery语义缓存的异构数据集成系统的查询处理方案,主要包括查询包含关系判定、查询分解和重写。同时提出利用树型同态算法解决XQuery查询语义包含关系的判断问题和Web环境下的缓存替换策略,旨在提高信息集成系统的查询性能。
A query processing scheme is proposed in this paper which inserts heterogeneous data integration system based on XQuery se- mantic cache into Mediator-Wrapper,mainly includes query containment matching, query decomposition and rewriting. In addition,Tree Ho- mostasis algorithm is used to solve judging problem of XQuery semantic containment and cache replacement strategy in Web condition ,to improve query performance of heterogeneous data integration system.
出处
《计算机应用与软件》
CSCD
北大核心
2008年第7期216-218,共3页
Computer Applications and Software
