Constraint Management in Loosely Coupled Distributed Databases

  title={Constraint Management in Loosely Coupled Distributed Databases},
  author={Sudarshan S. Chawathe and Hector Garcia-Molina and Jennifer Widom}
We provide a framework for managing integrity constraints that span multiple databases in loosely coupled, heterogeneous environments. Our framework enables the formal description of (1) interfaces provided by a database for the data items involved in multi-database constraints; (2) strategies for monitoring and maintaining multi-database constraints; (3) guarantees regarding the consistency of multi-database constraints. With our approach one can de ne \relaxed" constraints that only hold at… CONTINUE READING