Universitat Politècnica de Catalunya. Departament de Llenguatges i Sistemes Informàtics
Abstract
We propose a new method for generating consistency-preserving transaction programs for (view)
updates in deductive databases. The method augments the deductive database schema with a set of
transition and intemal events rules, which explicitly define the database dynamic behaviour in front of
a database update. At transaction-design-time, a formal procedure can use these rules to automatically
generate parameterised transaction programs for base or view-update transaction requests. This is
done in such a way that those transactions will never take the database into an inconsistent state. In
this paper we extend a previous version of the method by incorporating existentially defined rules.
Within this context, synthesis outputs and processes are provided. Toe method, implemented in
Prolog using meta-programming techniques, draws from our previous work in deductive databases,
particularly in view updating and integrity constraints checking
