A Prolog-Relational DBMS Interface Using Delayed Evaluation.

摘要: Abstract We present a PROLOG-Relational interface based on the loose coupling approach. The acts in two steps. In first one determines largest sub-sets of PROLOG program which can be evaluated by Relational DBMS, corresponding queries are evaluated, and their answers inserted program, replacing subsets. second step transformed is executed as any standard whithout access to DBMS. To determine subsets evaluable we use modified interpreter goal evaluations, for goals expressed predicates defined Data Base, replaced query construction. paper presents important improvements with regard similar works. Specially generated contain sub-queries connected operators AND, OR, NOT, or existentially quantified.