移动数据库中一种基于XML的视图增量更新算法

XML-based View Incremental Update Algorithm for Mobile Database

视图增量更新算法作为提高移动数据库响应性能的重要手段已有许多研究。随着XML结构在移动数据库中的应用,现有的算法不适用于目前移动数据库中存储的数据。提出了以XML树型结构为基础的一种新的视图增量更新算法XSI U(XML Structured-based Incremental Update),通过该算法能有效解决视图的增量更新在XML中的实现。实验表明,当带宽急剧下降时,该算法能有效提高移动环境中视图的增量更新性能。

The view incremental update algorithm as a measure of improving the mobile database responding periormance has lots of researches. With XML structure application in the mobile database, the existing algorithm does not apply to the current data stored in the mobile database. A new view incremental update algorithm XSIU （XML Structured-based Incremental Update） based XML tree structure was proposed, the algorithm can effectively solve the incremental updates in view of XML. Experiments show that, when the bandwidth declines sharply,the algorithm can effectively improve view incremental update performance in the mobile environment.