A content-aware adaptive storage approach for XML in PXRDB

  • Authors:

  • Xue Wang;Xiao Zhang;Xiaoyong Du;Shan Wang;Kuicheng Liu

  • Affiliations:

  • Renmin University of China, Beijing, China;Renmin University of China, Beijing, China;Renmin University of China, Beijing, China;Renmin University of China, Beijing, China;Renmin University of China, Beijing, China

  • Venue:
  • DASFAA'11 Proceedings of the 16th international conference on Database systems for advanced applications
  • Year:
  • 2011

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Abstract

In many cases, it is pretty difficult to choose an efficient storage method, such as native, xml-enabled or hybrid, for storing XML documents in a relational database. We provide multiple storage approaches for XML documents in our hybrid XML-relational database PXRDB( Pure XML-Relational DataBase). Further, another problem is how to automatically choose storage method for a given XML document and whether different documents in same column can be stored in different formats. In this paper, we provide a content-aware adaptive storage approach for XML in PXRDB. This novel storage approach automatically selects one better storage scheme for a specific XML document from three candidate schemata, i.e., native storage, flat stream and multi-relations after fast-checking its content. Our approach frees end-users or administrators from either having no choice or having to specify the specific storage scheme for large number of XML documents manually. It also allows different XML documents in same relational column to be stored in different formats while being accessed indistinctively. By providing unified access interfaces, new storage approaches can be easily registered in our system. The performance evaluation illustrates our approach is feasible and effective.