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Patchwork — A query-driven locally adaptive data space partitioning

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IGIS '94: Geographic Information Systems (IGIS 1994)

Part of the book series: Lecture Notes in Computer Science ((LNCS,volume 884))

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Abstract

The major goal of spatial access methods in query optimization is to deliver the exact or a minimal superset of the result set and to perform this task at minimal cost. We present a clustering spatial access method that directly delivers exact result sets. Minimal cost is guaranteed through a cost-based adaptation strategy that dynamically determines and realizes storage clusters best suited for a set of spatial range queries.

We introduce a tessalation of the data space which allows irregular, arbitrary small and large patches. Such patches can be adapted to query ranges in order to answer queries at minimal cost. The adaptation cost is kept small by performing only local repartitioning. Thus only a small number of neighbouring patches are merged or split during an adaptation step. The directory part has to be simple to perform range queries at minimal cost and to allow frequent adaptation updates at moderate cost. An implementation and evaluation in a database prototype system environment is under developement.

This work has partially been sponsored by the Swiss National Science Foundation (SNF) under grant NF 21-32801.91 as part of the ESPRIT Basic Research Activity “AMUSING” (EP6881).

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Authors and Affiliations

  1. Information Systems - Databases, ETH Zürich, CH-8092, Zürich, Switzerland

    Gisbert Dröge

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  1. Gisbert Dröge
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Jürg Nievergelt Thomas Roos Hans-Jörg Schek Peter Widmayer

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© 1994 Springer-Verlag Berlin Heidelberg

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Dröge, G. (1994). Patchwork — A query-driven locally adaptive data space partitioning. In: Nievergelt, J., Roos, T., Schek, HJ., Widmayer, P. (eds) IGIS '94: Geographic Information Systems. IGIS 1994. Lecture Notes in Computer Science, vol 884. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-58795-0_49

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  • DOI: https://doi.org/10.1007/3-540-58795-0_49

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-58795-8

  • Online ISBN: 978-3-540-49105-7

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