Titlebook: Deductive and Object-Oriented Databases; 5th International Co Fran?ois Bry,Raghu Ramakrishnan,Kotagiri Ramamohan Conference proceedings 199

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Conference proceedings 1997bstracts or full versions of three invited talks and three tutorials and six short presentations. The papers are organized in topical sections on materialized view maintenance, extending DBMs features, database updates, managing change in object databases, semantics of active databases, formal semantics, and new directions.

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https://doi.org/10.1007/978-3-658-33841-1malized as first order monadic theories. We show the problem to be co-NP-complete in general. Based on a formal system, we provide incremental update algorithms. By introducing a rule-goal (hyper)graph, non-trivial conditions are presented in different cases which guarantee the problem‘s reduction to the polynomial level.

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Incremental updates for materialized OQL views,inearity, to derive incremental update plans. It turns out that it is feasible to employ ODMG OQL as a view definition language — instead of inventing a specialized one — in such an environment, since the majority of its clauses represent linear functions.

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Logical updating of object class structures,malized as first order monadic theories. We show the problem to be co-NP-complete in general. Based on a formal system, we provide incremental update algorithms. By introducing a rule-goal (hyper)graph, non-trivial conditions are presented in different cases which guarantee the problem‘s reduction to the polynomial level.

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0302-9743 ns on materialized view maintenance, extending DBMs features, database updates, managing change in object databases, semantics of active databases, formal semantics, and new directions.978-3-540-63792-9978-3-540-69647-6Series ISSN 0302-9743 Series E-ISSN 1611-3349

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Conference proceedings 1997ux, Switzerland, in December 1997. The 22 revised full papers presented in this book were selected from a total of 59 submissions. Also included are abstracts or full versions of three invited talks and three tutorials and six short presentations. The papers are organized in topical sections on mate