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Query rewriting and answering under constraints in data integration systems
2003
International Joint Conference on Artificial Intelligence
In this paper we address the problem of query answering and rewriting in global-as-view data integration systems, when key and inclusion dependencies are expressed on the global integration schema. In the case of sound views, we provide sound and complete rewriting techniques for a maximal class of constraints for which decidability holds. Then, we introduce a semantics which is able to cope with violations of constraints, and present a sound and complete rewriting technique for the same dec
dblp:conf/ijcai/CaliLR03
fatcat:hzpf3pw4k5cj7ay74j5dcpjy5i