Updating Multiple Databases Through Mediators

Mediator is a facility that supports an integrated view over multiple information sources, and allows for queries to be made against the integrated view. In this paper, we extend the mediator architecture to support updates against the integrated view. Updates expressed against the mediator’s integrated view need to be translated into updates of the underlying local databases. We developed algorithms to generate translators for the basic types of mediator update operations. In our approach, a translator is a function that receives an update request and generates the update’s translation. In this paper, we present the algorithm that generates translators for monovalued attribute modification operations.