分布式数据库半联接操作的实现及优化算洁研究

IMPLEMENTATION OF SEMI-JION OPERATION IN DISTRIBUTED DATA BASE AND ITS OPTIMIZATION ALGORITHMS RESEARCH

本文分析了分布式数据库系统中联接分布关系的半联接优化原理和半联接的一般实现方法，改进和扩充了几种新的半联接运算的实现策略，并且详细分析了它们的开销。最后，运用该技术给出一种两水平分片间联接操作的的优化算法。

In this paper,we analyse the principles of the optimization of semi-jion operation,advance the algorithms of semi-jion program,and discuss theirs benefit and profit.At last,we give an algorithm of optimization of semi-jion operation in horizontally partitioned.