Hi:
During the execution of flink, especially the sql API, many operations
in DataStream are not available. In many cases, we don't care about the
DELETE record when retracting. Is it possible to set a switch so that the
DELETE record when retracting is not processed? In other words, the
downstream only receives a value after UPDATE, and does not need to receive
the value before UPDATE. In some programming modes, processing DELETE
records actually makes the logic more complicated.Best Lec Ssmi
