一种分布式查询优化的研究与应用  

A Distributed Query Optimization Research And Application

作　　者：朱青[1] 李翔[1] 

机构地区：[1]北京工业大学软件学院,北京100124

出　　处：《微计算机信息》2010年第33期163-164,218,共3页Control & Automation

摘　　要：查询优化是比较复杂的问题,但在分布式系统中有重要作用。本文通过对分布式查询的分析,提出了基于全局关系表的分布式优化查询方法,用一个待更新列表来同步全局关系表,保证查询结果。实验结果表明,该方法有效地减少了分布式查询的时间,提高了分布式查询的速度。Query optimization is a complex issue, but in a distributed system has an important role. In this paper, the analysis of the distributed query put forward approach based on global relationships table distributed query optimization, using a Wait_List to be updated to synchronize the global relational table to ensure that query results. The experimental results show that the method is effective in reducing the distributed query in the data communication, raising a distributed query speed.

关 键 词：分布式查询优化 全局关系表 待更新列表 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]