异构数据库查询优化算法设计  

The Optimization Algorithm Design of Heterogeneous Database Query

作　　者：陈宝[1] 甘雷[2] 

机构地区：[1]唐山学院计算机中心,河北唐山063000 [2]唐山学院网络教育中心,河北唐山063000

出　　处：《唐山学院学报》2013年第3期88-90,共3页Journal of Tangshan University

摘　　要：传统结构模型对于各个异构数据库之间都建立用户交互模式,系统的易用性低,复杂度高。通过对查询算法分析,建立了统一的公共模式来访问系统,提出基于半连接操作的优化算法。实验结果表明,查询时间与全连接相比减少,系统性能得到提高。The traditional structure model builds user interaction models among heterogeneous da- tabase, and the system usability is low but quite complex. Through the analysis of the query al- gorithm design, the public mode of unified access to the system is established a optimization algorithm based on semi-join operating is put forward. Experimental results show that the query time is reduced compared with full connection and the system performance is improved.

关 键 词：异构数据库 半连接 算法 

分 类 号：TP311.13[自动化与计算机技术—计算机软件与理论]