【作者】 方强； 王国仁； 于戈； 郑怀远；

【机构】 东北大学；

【摘要】 <正>1引言由于关系模型的语义表达能力不够强,缺乏足够的对数据的结构和行为进行建模的能力,因而在许多应用领域,如CAI、多媒体数据以及知识工程中已不能适应要求。受面向对象更多还原

【Abstract】 In the complex OQL,path expressions are always included.Path expressions are one of the most time-consuming operations,so it is necessary to computing path expressions in parallel in order to improve the performance of OODBMS.This paper presents different scheduling execution plans for path expression,mainly considering parallel resources such as memory,network etc.,and puts forward a new ASAPE algorithm for constructing the most optimum scheduling execution plan.At the end of paper, cost models and simulation results are also shown.At present,NOW is a popular parallel architecture, and all the discussions for path expression in the paper are based on the cluster of PC environments.更多还原