In the previous example, if customer.customer_num and orders.customer_num are not indexed, dynamic hash join would be chosen by the optimizer as the best execution plan.
在前一个实例中，如果customer . customer_num和orders . customer_num都没有被索引，那么优化器将选择动态哈希连接来作为最佳的执行计划。
If you don't need a property indexed (that is, you don't plan on searching a domain object by that individual property), then turning off that index probably makes sense.
如果您不需要对某个属性建立索引(也就是说，您不计划通过该单个属性搜索域对象)，则关闭该索引可能是有意义的。
The selected area electron diffraction (SAED) pattern of the twin was indexed by transforming matrix of hexagon crystal twin plan.
并采用六方晶系孪晶面的变换矩阵对孪晶电子衍射花样进行了标定。
The selected area electron diffraction (SAED) pattern of the twin was indexed by transforming matrix of hexagon crystal twin plan.
并采用六方晶系孪晶面的变换矩阵对孪晶电子衍射花样进行了标定。
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