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CS240A: Databases and Knowledge Bases From Deductive Rules to Active Rules

CS240A: Databases and Knowledge Bases From Deductive Rules to Active Rules. Carlo Zaniolo Department of Computer Science University of California, Los Angeles. Maintenance. Every time the database is changed re-compute the concrete view, or

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Delta maintenances of Transitive Closure by Active Rules

Delta maintenances of Transitive Closure by Active Rules. CS240A Homework Solution Carlo Zaniolo, UCLA CS Department. Non-Recursive delta rules for arc(X,Y). If only one new arc d+arc(A,B) is inserted. d+closr(A, B) <- d+arc(A, B). d+closr(A, Z) <- d+arc(A,B), closr(B,Z).

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Reinsert rules - PowerPoint PPT Presentation

CS240A: Databases and Knowledge Bases From Deductive Rules to Active Rules

Delta maintenances of Transitive Closure by Active Rules