01 Nov 2015
Protocols for Integrity Constraint Checking in Federated Databases
Global integrity constraints can be very useful in federated databases, but the lack of global queries, global transaction mechanisms, and global concurrency control renders traditional constraint management techniques inapplicable.
- the problem of constraint checking in a federated database environment is clearly formulated
- a family of protocols for constraint checking
- the differences across protocols in the family are analyzed with respect to system requirements, properties guaranteed by the protocols, and processing and communication costs
Information servers are being developed that provide integrated access to multiple data sources.
Large workflow management applications require the routing of information through multiple, autonomous local systems … integration of autonomous database systems into loosely-coupled federations
2.2 Basic Architecture and Assumptions
2.4
In this paper we consider constraints over two relations, R and S.
The problem of incremental constraint checking has been studied extensively (see, e.g., [4, 13, 22, 26, 25, 29]).
