Claude Delobel Sophie Cluet ACM SIGMOD Conference 1992 21 2 383 392 1031 KB The goal of this work is to integrate in a general framework the different query optimization techniques that have been proposed in the object-oriented context. As a first step, we focus essentially on the logical aspect of query optimization. In this pap Information Systems, DATABASE MANAGEMENT, Systems, Query processing. Theory of Computation, MATHEMATICAL LOGIC AND FORMAL LANGUAGES, Grammars and Other Rewriting Systems. Information Systems, DATABASE MANAGEMENT, Logical Design, Data models. H.2.1 Information Systems, DATABASE MANAGEMENT, Logical Design, Data models. H.2.4 Information Systems, DATABASE MANAGEMENT, Systems, Query processing. F.4.2 Theory of Computation, MATHEMATICAL LOGIC AND FORMAL LANGUAGES, Grammars and Other Rewriting Systems.