Efficient evaluation for a subset of recursive queries

  • Authors:
  • G. Grahne;S. Sippu;E. Soisalon-Soininen

  • Affiliations:
  • Department of Computer Science, University of Helsinki, Tukholmankatu 2, SF-00250 Helsinki, Finland;Department of Computer Science, University of Jyvaskyla, Seminaarinkatu 15, SF-40100 Jyvaskyla, Finland;Department of Computer Science, University of Helsinki, Tukholmankatu 2, SF-00250 Helsinki, Finland

  • Venue:
  • PODS '87 Proceedings of the sixth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
  • Year:
  • 1987

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Abstract

Well-known results on graph traversal are used to develop a practical, efficient algorithm for evaluating regularly and linearly recursive queries in databases that contain only binary relations. Transformations are given that reduce a subset of regular and linear queries involving n-ary relations (n 2) to queries involving only binary relations.