连接次序 meaning in English
conjunctive ordering
Examples
- Join order directives that force optimizer to join tables in the designated order
连接次序指示，强制优化器按照指定次序连接表。 - Firstly , the system r style dynamic programming procedure ( and the specific heuristic rule ) is used to determine the join order of the relations . after that , the expensive predicates are placed in the operator tree ( or execution plan ) according their rank values with respect to joins
它首先利用systemr中的动态规划优化算法和启发式规则为连接运算产生连接次序，在此基础上，根据选择条件的rank值，将它放置到执行规划中的适当位置。