[jira] [Created] (FLINK-15475) Add isOutputTypeUsed() API to Transformation

[Shang Yuanchun (Jira)]

Rong Rong created FLINK-15475:
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             Summary: Add isOutputTypeUsed() API to Transformation
                 Key: FLINK-15475
                 URL: https://issues.apache.org/jira/browse/FLINK-15475
             Project: Flink
          Issue Type: Improvement
          Components: API / Core, API / DataSet, API / DataStream
            Reporter: Rong Rong
            Assignee: Rong Rong


Currently there's no way to "peek" into a Transformation and see if OutputType has been used or not. The only way is to invoke the {{setOutputType}} API and wrap around it with a try-catch block.

It would be nice if we have a `isTypeUsed()` or `isOutputTypeUsed()` API to check whether a particular transformation has a definitive output type set / used or not.





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