ifndef-SleePy commented on issue #8894: [FLINK-12961][datastream] Providing an internal execution method of StreamExecutionEnvironment accepting StreamGraph as input parameter URL: https://github.com/apache/flink/pull/8894#issuecomment-506671123 @aljoscha I think you have raised a good question! AFAIK, Blink runner generates `StreamGraph` itself. And it also keeps transformations itself. When a `DataStream` is translated to a `Table`, the Blink batch runner back tracks the all transformations of `StreamExecutionEnvironment` through transformations kept by itself. Although there is a corner case that if there exists a disconnected sub graph in `StreamExecutionEnvironment` which might not be touched by back tracking. I have not reached an agreement with my colleague about this case. I'm wondering whether there is a better solution for Blink batch runner?
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