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Information Technology Journal
  Year: 2010 | Volume: 9 | Issue: 1 | Page No.: 116-123
DOI: 10.3923/itj.2010.116.123
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Research on Index Technology for Group-by Aggregation Query in XML Cube

Yawei Zhao, Tinghuai Ma and Feng Liu

In order to enhance efficiency of group-by aggregation query, the purpose of this study is to explore a new XML data cube model and on this basis to research appropriate index technology. As group-by aggregation query is common in data cube, the query efficiency of an XML cube, especially for aggregation query, is critical to determine its usability. In this study, we introduce a new kind of format of XML cube and propose an index method of the cube for group-by aggregation query, the index of which is based on hash and tree index to rapidly attain the measurable paths in the cube. We describe the algorithms of building the new index and its corresponding group aggregation query in an XML data cube and estimate the cost of query and carry out related experiments.
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How to cite this article:

Yawei Zhao, Tinghuai Ma and Feng Liu, 2010. Research on Index Technology for Group-by Aggregation Query in XML Cube. Information Technology Journal, 9: 116-123.

DOI: 10.3923/itj.2010.116.123






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