This routine can be run on a sample of the original data for faster performance.
这个例程可以在原始数据的样本上运行以获得更快速的性能。
2
This routine creates a copy of your existing table with the new partitioning key and loads it partially or fully with the data from the original table.
这个例程用新的分区键创建了现有表的一个副本并用来自原始表的数据对它进行部分或全部加载。
3
A new catalog entry is created for each external routine, referencing the binary of the original source routine.