| 摘要: |
| 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. |
| 关键词: XML(extensible markup language) 关系数据库 存储 查询 |
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| 基金项目:Supported by the National Natural Science Foundation of China under Grant Nos.60303008, 69933010 (国家自然科学基金); the National High-Tech Research and Development Plan of China under Grant No.2002AA4Z3430 (国家高技术研究发展计划(863) |
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| A Technique to Generate and Optimize the Materialized Model for XML Data |
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ZHANG Liang,LI Ran,WANG Wei,SHI Bai-Le
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| Abstract: |
| 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. |
| Key words: XML (extensible markup language) relational database storage query |
