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Evaluating XML-Extended OLAP Queries Based on Physical Algebra

Evaluating XML-Extended OLAP Queries Based on Physical Algebra

Xuepeng Yin, Torben Bach Pedersen
Copyright: © 2009 |Pages: 33
ISBN13: 9781605660585|ISBN10: 1605660582|EISBN13: 9781605660592
DOI: 10.4018/978-1-60566-058-5.ch152
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MLA

Yin, Xuepeng, and Torben Bach Pedersen. "Evaluating XML-Extended OLAP Queries Based on Physical Algebra." Database Technologies: Concepts, Methodologies, Tools, and Applications, edited by John Erickson, IGI Global, 2009, pp. 2510-2542. https://doi.org/10.4018/978-1-60566-058-5.ch152

APA

Yin, X. & Pedersen, T. B. (2009). Evaluating XML-Extended OLAP Queries Based on Physical Algebra. In J. Erickson (Ed.), Database Technologies: Concepts, Methodologies, Tools, and Applications (pp. 2510-2542). IGI Global. https://doi.org/10.4018/978-1-60566-058-5.ch152

Chicago

Yin, Xuepeng, and Torben Bach Pedersen. "Evaluating XML-Extended OLAP Queries Based on Physical Algebra." In Database Technologies: Concepts, Methodologies, Tools, and Applications, edited by John Erickson, 2510-2542. Hershey, PA: IGI Global, 2009. https://doi.org/10.4018/978-1-60566-058-5.ch152

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Abstract

In today’s OLAP systems, physically integrating fast-changing data (e.g., stock quotes) into a cube is complex and time-consuming. The data is likely to be available in XML format on the World Wide Web (WWW); thus, instead of physical integration, making XML data logically federated with OLAP systems is desirable. In this article, we extend previous work on the logical federation of OLAP and XML data sources by presenting simplified query semantics, a physical query algebra, and a robust OLAP-XML query engine, as well as the query evaluation techniques. Performance experiments with a prototypical implementation suggest that the performance for OLAP-XML federations is comparable to queries on physically integrated data.

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