Unsolvable problems related to the view integration approach

  • Bernhard Convent
Contributed Papers
Part of the Lecture Notes in Computer Science book series (LNCS, volume 243)


View integration is a method that should help to manage the complexity of design problems for extensive database applications with many different user groups. For each such user group the requirements and expectations are separately specified as simple view database schemes, which are subsequently integrated into a global scheme that is able to support all views.

In this paper we present a simple, formal specification method for view integration, which is used as a theoretical basis to show some severe computational limits of computer-aided view integration. Particularly, we prove that conflictfreeness of a set of views is undecidable and furthermore, we show that finite logical implication is undecidable for a simple class of integrity and integration constraints, which we believe to be essential to any reasonable integration method.


Decision Problem User Group Word Problem Integrity Constraint Relation Scheme 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag Berlin Heidelberg 1986

Authors and Affiliations

  • Bernhard Convent
    • 1
  1. 1.Informatik VIUniversität DortmundDortmund 50Federal Republic of Germany

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