[jira] [Commented] (FLINK-11226) Lack of getKeySelector in Scala KeyedStream API unlike Java KeyedStream

["Dawid Wysakowicz (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-11226?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16961834#comment-16961834 ] 

Dawid Wysakowicz commented on FLINK-11226:
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I am not convinced about exposing this API. As Aljoscha already mentioned this is an internal API. 

I also don't think the provided example is a good argument for adding it. The EventTimeSessionWindows.withDynamicGap does not have access to a KeyedStream. It needs to be passed separately, which would imply serializing it into the WindowAssigner. DataStream is not supposed to be serialized.

I will close this issue for now, feel free to reopen it if you disagree.

> Lack of getKeySelector in Scala KeyedStream API unlike Java KeyedStream
> -----------------------------------------------------------------------
>
>                 Key: FLINK-11226
>                 URL: https://issues.apache.org/jira/browse/FLINK-11226
>             Project: Flink
>          Issue Type: Improvement
>          Components: API / DataStream
>    Affects Versions: 1.7.1
>            Reporter: Albert Bikeev
>            Assignee: vinoyang
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> There is no simple way to access key via Scala KeyedStream API because there is no 
> getKeySelector method, unlike in Java KeyedStream. 
> Temporary workarounds are appreciated.



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