[jira] [Created] (FLINK-14658) Drop ".returns()" for TypeInformation in the DataStream API

[Shang Yuanchun (Jira)]

Stephan Ewen created FLINK-14658:
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             Summary: Drop ".returns()" for TypeInformation in the DataStream API
                 Key: FLINK-14658
                 URL: https://issues.apache.org/jira/browse/FLINK-14658
             Project: Flink
          Issue Type: Sub-task
          Components: API / DataStream
            Reporter: Stephan Ewen
             Fix For: 2.0.0


The pattern to use {{.map(function).returns(type)}} to override the automatically extracted type is flawed and should not be used.

Instead, each transformation method should be overloaded to have a variant that accepts the return type as the second argument, if in case we want to override the type extractor.

See [FLINK-14380] for good example of why the {{.returns(type)}} pattern is broken.



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