摘要
描述了查询树的启发式优化方法,优化了文献[1]中的查询树,并分析了查询树的执行代价。
The method of query tree's heuristic optimization is introduced in this paper.The query tree in the literature[1] is optimized and runtime of the query trees is analyzed.
作者
张岩
ZHANG Yan (Department of Computer Science, Fuyang Teachers College,Fuyang 236032,China)
出处
《电脑知识与技术》
2007年第7期126-127,共2页
Computer Knowledge and Technology
关键词
查询树
启发式优化
查询处理
Query tree
Heuristic optimization
Query processing