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。
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