摘要
在分布式查询处理中 ,要根据不同的优化目的来设计各种查询处理的优化算法。使通讯费用最小 ,响应时间最短是两个优化准则。通常系统采用基于关系代数操作 ,请求分解定位和存取路径的优化三种技术对请求进行优化。
In Distrabuted query,we should devise the query optimization algorithm according to different optimization purpose.Two of optimization guidelines are minimal communication cost and minimal response time.The system always adopt three kinds of technology that base on relational algebra operation,request decomposit localization,access route optimization to make optimization.
出处
《辽宁税务高等专科学校学报》
2000年第1期47-47,48F003,共2页
Liaoning Taxation College Journal
