Extending XQuery with window functions

  • Authors:
  • Irina Botan;Donald Kossmann;Peter M. Fischer;Tim Kraska;Dana Florescu;Rokas Tamosevicius

  • Affiliations:
  • ETH Zurich;ETH Zurich;ETH Zurich;ETH Zurich;Oracle;ETH Zurich

  • Venue:
  • VLDB '07 Proceedings of the 33rd international conference on Very large data bases
  • Year:
  • 2007

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Abstract

This paper presents two extensions for XQuery. The first extension allows the definition and processing of different kinds of windows over an input sequence; i.e., tumbling, sliding, and landmark windows. The second extension extends the XQuery data model (XDM) to support infinite sequences. This extension makes it possible to use XQuery as a language for continuous queries. Both extensions have been integrated into a Java-based open source XQuery engine. This paper gives details of this implementation and presents the results of running the Linear Road benchmark on the extended XQuery engine.