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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