IT代写 CA 94720
Predicate Migration: Optimizing Queries with Expensive Predicates . Hellerstein Michael Stonebraker Computer Science Division, EECS Department University of California, Berkeley, CA 94720 Copyright By PowCoder代写 加微信 powcoder In this paper we develop a theory for moving expensive predicates in a query plan so that the total cost of the plan — including the costs of […]