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https://issues.apache.org/jira/browse/FLINK-7152?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16083643#comment-16083643
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Aljoscha Krettek commented on FLINK-7152:
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As Stephan said, we plan to remove split/select in favour out side outputs.
Unfortunately we can't do this because they are part of the {{@Public}} API and
we have guarantees for not touching that in place. At the earliest we can
remove this API in a 2.0 release.
In the interim, I would suggest to not make {{Outputs}}/{{OutputSelectors}}
more complex and instead to try and remove as much complexity there as possible
and try and implement split/select on top of side outputs. What do you think?
> use CombineOutputSelector instead of outputSelector list
> --------------------------------------------------------
>
> Key: FLINK-7152
> URL: https://issues.apache.org/jira/browse/FLINK-7152
> Project: Flink
> Issue Type: Improvement
> Components: DataStream API
> Reporter: Xu Pingyong
> Assignee: Xu Pingyong
>
> There is a list of outputSelector in streamNode and streamOperator.
> Every outputSelector returns a string list:
>
> {code:java}
> Iterable<String> select(OUT value);
> {code}
> then string results of all outputSelectors will be unioned in the streamTask
> when outputing a record.
> So I want to introduce CombineOutputSelector to union these results, and only
> one OutputSelector is needed in streamNode and streamOperator.
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