Towards a sound view integration methodology

  • Authors:
  • M. A. Casanova;V. M. P. Vidal

  • Affiliations:
  • Centro Científico --- IBM do Brasil, Brasília, DF, Brasil;Pontifícia Universidade Católica do RJ, Rio de Janeiro, RJ, Brasil

  • Venue:
  • PODS '83 Proceedings of the 2nd ACM SIGACT-SIGMOD symposium on Principles of database systems
  • Year:
  • 1983

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Abstract

View integration is investigated with the help of three classes of interrelational dependencies, inclusion dependencies, exclusion dependencies and union functional dependencies. The process of view integration is divided into two steps, combination and optimization. View combination consists in defining new interrelational dependencies that capture similarities between different views. The optimization step tries to reduce redundancy and the size of the schema. Finally, general results about interrelational dependencies are presented that lead to an optimization procedure for a restricted class of schemas.