Tie-breaking strategies for fast distance join processing

  • Authors:
  • Hyoseop Shin;Bongki Moon;Sukho Lee

  • Affiliations:
  • School of Computer Science and Engineering, Seoul National University, Seoul, Republic of Korea;Department of Computer Science, University of Arizona, Tucson, AZ;School of Computer Science and Engineering, Seoul National University, Seoul, Republic of Korea

  • Venue:
  • Data & Knowledge Engineering
  • Year:
  • 2002

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Abstract

The distance join is a spatial join that finds pairs of closest objects in the order of distance by associating two spatial data sets. The distance join stores node pairs in a priority queue, from which node pairs are retrieved while traversing R-trees in top-down manners in the order of distance. This paper first shows that a priority strategy for the tied pairs in the priority queue during distance join processing greatly affects its performance. Then it proposes a probabilistic tie-breaking priority method. The experiments show that the proposed method is always better than alternative methods in the performance perspectives.