Queries and updates in the coDB peer to peer database system

  • Authors:
  • Enrico Franconi;Gabriel Kuper;Andrei Lopatenko;Ilya Zaihrayeu

  • Affiliations:
  • Free University of Bozen-Bolzano, Faculty of Computer Science, Italy;University of Trento, DIT, Italy;Free University of Bozen-Bolzano, Faculty of Computer Science, Italy and University of Manchester, Department of Computer Science, UK;University of Trento, DIT, Italy

  • Venue:
  • VLDB '04 Proceedings of the Thirtieth international conference on Very large data bases - Volume 30
  • Year:
  • 2004

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Abstract

In this short paper we present the coDB P2P DB system. A network of databases, possibly with different schemas, are interconnected by means of GLAV coordination rules, which are inclusions of conjunctive queries, with possibly existential variables in the head; coordination rules may be cyclic. Each node can be queried in its schema for data, which the node can fetch from its neighbours, if a coordination rule is involved.