根据用户查询的分布情况,基于缓存以及在硬盘上对XML(extensible markup language)数据进行物化是提高XML数据存储与查询系统性能的主要方法之一提出了一种XML查询集合的描述方法,即查询模式图,并以此为基础提出了一种能够充分考虑查询优化策略的物化方案生成方法,实验结果表明,该方法可以快速地生成物化方案,能够满足缓冲区管理等应用领域的需要.
One way to improve the performance of XML (extensible markup language) management systems is to materialize part of the XML documents and store them aside in cache memory, in this paper, a method is presented to characterize query sets of XML data as schema graph, which is a technique to generate materialized plan based on the distribution of user's queries. Experimental results demonstrate its performance gain in XML cache management.