XQuery物化视图增量更新系统框架的研究

在Web应用中,以XML为格式的信息查询通常会受到网络传输速度有限等因素的影响。为了减少XML的物化视图与其数据源之间的一致性维护中所需的网络数据传输开销,提出了一种面向远程的XML物化视图增量维护方法和系统框架。这种方法根据多用户的查询请求和数据源更新信息,生成视图维护程序代码,以程序代码的网络迁移代替XML视图的重复查询,有效地减少了网络数据传输量。介绍了物化视图增量维护的基本原理、系统框架以及设计实现思路。最后通过性能测试,说明这种增量维护系统能够有效地减少传输开销。

RESEARCH ON XQUERY MATERIALISED VIEW INCREMENTAL UPDATING SYSTEM FRAMEWORK

In web applications information queries on data in XML format is often cumbered by such factors as network transfer speed.To reduce the network data transfer spending required by the consistency maintenance between the XML materialised views and their data sources,the thesis proposes a remote XML materialised view incremental maintenance method and the corresponding system framework.The method relies on queries from multiple users and updates of data sources to create view maintenance codes to replace code ...