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https://issues.apache.org/jira/browse/FLINK-3659?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15219594#comment-15219594
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ASF GitHub Bot commented on FLINK-3659:
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Github user aljoscha closed the pull request at:
https://github.com/apache/flink/pull/1831
> Allow ConnectedStreams to Be Keyed on Only One Side
> ---------------------------------------------------
>
> Key: FLINK-3659
> URL: https://issues.apache.org/jira/browse/FLINK-3659
> Project: Flink
> Issue Type: Improvement
> Components: Streaming
> Affects Versions: 1.0.0
> Reporter: Aljoscha Krettek
> Assignee: Aljoscha Krettek
>
> Currently, we only allow partitioned state when both inputs are keyed (with
> the same key type). I think a valid use case is to have only one side keyed
> and have the other side broadcast to publish some updates that are relevant
> for all keys.
> When relaxing the requirement to have only one side keyed we must still
> ensure that the same key is used if both sides are keyed.
> [~gyfora] Did you try this with what you're working on?
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