So most research of distributed query optimization aim at reducing communication cost.
所以大多数研究分布式查询优化以减少通讯开销为目标。
In the distributed query optimization, both local processing cost and transmission cost should be thought over simultaneously.
在分布式查询优化中,应同时考虑本地处理代价和传输代价。
The query processing in the distributed database systems is comprehensively summarized. This paper shows that using HASHING method for thereduction of semi-join communication cost is beneficial.
本文较全面地总结了分布式数据库系统的查询处理,并提出用HASHING 方法减少半连接通讯的开销是有利的。
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