It is now allowed to feed the INSERT operation.
现在它可以为INSERT操作提供数据了。
These columns are simply hitching a ride along the INSERT operation and are accessible to the SELECT above.
这些列只是通过INSERT操作搭载的,并且上面的SELECT可以访问这些列。
Therefore during merge-insert operation, only for-each-row insert triggers on the target table are activated.
因此,在merge - insert操作过程中,仅激活目标表上的for - each - row insert触发器。
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