摘要
联邦数据库系统由异构分布且自治共享的成员数据库系统组成．联邦用户提交的查询事务不仅涉及本库数据，而且涉及异地多库数据．本文提出一种基于规则的联邦查询分解优化策略，可提高系统优化性能，使联邦事务处理规则化。
Federated database system is an integration of many heterogeneous,distributed,autonomous and sharing member database systems.Query transaction submitted by federal user deals with not only local but also remote data.This paper presents a rule based federated query decomposition strategy,which can improve system performance and make new member system join easier.
出处
《计算机研究与发展》
EI
CSCD
北大核心
1997年第4期270-274,共5页
Journal of Computer Research and Development
关键词
联邦数据库
查询处理
转换规则
数据库系统
federated database, query processing, transformation rule, match, substitute
