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

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https://doi.org/10.1007/978-3-476-03675-9considered the incremental maintenance of deductive views defined by expensive database queries, including the transitive closure query. An interesting approach is to use only first-order queries in this maintenance, after small changes (e.g. one tuple insertions and deletions) to base relations. In

Diastole

Das methodische Vorgehen im überblickpe extents or classes) themselves need not be materialized. In exchange, the system maintains (redundant) views of the application data that help to minimize query response time. We understand views as functions of database objects and examine algebraic properties of these functions, in particular l

Diastole

Zusammenfassung – Diskussion – Ausblickble using additional data together with the views. For instance, one can replicate auxiliary views of the base relations at the site where the views are materialized to ensure self-maintenance of the views. However, the previous approaches often lead to the replication of the entire base relations,

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Was ist der ‘?sthetische Vektor’?er attributes. This approach minimizes the complexity of the schema. We propose a formalism in which rules are divided into two classes: “Defining rules” specify the existence of tuples in the relation, together with some of their attributes. “Refining rules” specify derived attributes of tuples tha