Deciding on the Equivalence of a Relational Schema and and Object-Oriented Schema

  • Authors:
  • Reda Alhajj

  • Affiliations:
  • -

  • Venue:
  • DEXA '00 Proceedings of the 11th International Conference on Database and Expert Systems Applications
  • Year:
  • 2000

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Abstract

This paper presents a novel approach to decide on the equivalence of a conventional relational schema and a corresponding object-oriented schema. We assume that the two schemas are consistent and implemented a prototype to handle the process. First, characteristics of the relational schema are derived and lead to a graph consistent with the entity-relationship diagram. Second, a graph that include all nesting and inheritance links is derived based on characteristics of the object-oriented schema. Third, we investigate the equivalence of the two graphs in order to decide on relational attributes equivalent to object-oriented attributes with primitive domains, and on the equivalence between relational foreign keys and object-oriented attributes with non-primitive domains.