分布式查询优化算法与应用实践  

Optimizing Algorithm of Distributed Query and Its Application

作　　者：冯勇[1] 白杨[1] 徐红艳[1] 

机构地区：[1]辽宁大学信息科学与技术学院,辽宁沈阳110036

出　　处：《辽宁大学学报（自然科学版）》2003年第3期255-257,共3页Journal of Liaoning University：Natural Sciences Edition

摘　　要：依据笔者开发大型分布数据库的应用实践,首先介绍半连接、选择因子、收益分析等基础概念,其次介绍分布式查询处理过程,主要阐述以半连接为核心的SDD-1查询优化算法,最后以实例说明该算法的实现并比较实际收益情况.Based on the authors practice obtained from the development in the field of large scale distributed database system, the following points are presented. Some basic concepts are introduced in the first part, such as semijoin, selectivity factor, profit analysis, and distributed query processing. Query optimization algorithm of SDD - 1 focusing on semijoin is expounded primarily in the second part. Finally the completion of algorithm is proved by concrete examples and the corresponding profits are compared.

关 键 词：分布式数据库 信息查询 分布式查询 SDD-1查询优化算法 半连接 选择因子 

分 类 号：TP311.133[自动化与计算机技术—计算机软件与理论]