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.
出处
《唐山学院学报》
2013年第3期88-90,共3页
Journal of Tangshan University
关键词
异构数据库
半连接
算法
heterogeneous database
semi-join
algorithm