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

["Weijie Guo (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-14658?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17878732#comment-17878732 ] 

Weijie Guo commented on FLINK-14658:
------------------------------------

Move to 3.0 as we didn't deprecate it before.

> 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
>            Priority: Major
>             Fix For: 3.0.0
>
>
> 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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