基于分布式数据库系统的一种查询优化算法

An Optimized Algorithm Inguiry in Distributed Database System

分布式数据库系统由于数据的物理分布和冗余使得分布式查询处理增加了难度和复杂度,使得分布式数据库系统的查询优化较集中式数据库系统更为重要。介绍分布式数据库系统的特点和分布式查询优化及一种新的查询算法:基于语义信息的分布查询处理。

In the distributed database system, distributed inquiry process becomes difficult and complex because of the physical distribution and redundancy of data. Therefore, an optimized inquiry method based on distributed database system is more important than that on concentrated database system. It introduces a distributed database system, a distributed inquiry process and a new optimized inquiry method, that is, distributed inquiry process on the basis of semantics.