在复制处理期间修改源模式中的表可能会导致在复制操作之后目标模式中的数据不相同。

Changes to tables in the source schema during copy processing might mean that the data in the target schema is not identical following a copy operation.

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处理在将旧分区中的行转移到新表分区时因alter操作而生成的DML日志记录。

Process DML log records generated due to an alter operation while moving the rows from the old partition to the new table partition.

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这个例子的意图是说明，在处理分区的表时，需要考虑到操作输出流涉及的分区数量。

The purpose of this example is to show that when dealing with partitioned tables, you need to account for the number of partitions from the operator output stream.

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