Ps22Pdf 关键词 : 遥操作 ; 变时延 ; 多连接 [gap=996]Key words: teleoperation; variable time delay; multi-join
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multi join query 多元连接查询
multi join 多元连接
Multi-Join Query 多连接查询
multi join queries 多元连接查询
multi-join queries 多元连接查询
multi - join queries 多元连接查询
multi-join expressions 多连接表达式
The experiments prove that th~ rewriter rules are effective and genetc algorithm has obvious advantage while processing multi-join query.
结果表明,本文提出的重写规则是很有效的,遗传算法在处理多连接查询时具有明显的优越性。
参考来源 - 关系数据库查询优化技术的研究与实现·2,447,543篇论文数据,部分数据来源于NoteExpress
The multi-join query optimization is the critical problem of parallel query optimization in parallel database system.
多连接查询优化是并行数据库系统的核心问题。
Now most of the research work is based on the storage of single relation, and could not support effectively complex multi-join query.
已有的研究工作多集中在基于单个关系的存储分布,不能有效支持复杂多连接查询处理。
To improve the execution efficiency of the query processors, the authors exploit heuristics to seek the optimum parallel scheduling execution plan for multi-join expressions.
为了提高查询处理器的执行效率,采用启发式规则来搜索最优的多连接表达式并行调度执行计划。
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