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https://issues.apache.org/jira/browse/FLINK-10947?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17321976#comment-17321976
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Flavio Pompermaier commented on FLINK-10947:
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I think this should be fixed so I remove the stale-minor label (and as
[~aljoscha] suggested I increase the priority)
> Document handling of null keys in the data types documentation
> --------------------------------------------------------------
>
> Key: FLINK-10947
> URL: https://issues.apache.org/jira/browse/FLINK-10947
> Project: Flink
> Issue Type: Task
> Components: API / Type Serialization System, Documentation
> Affects Versions: 1.6.2
> Reporter: Flavio Pompermaier
> Assignee: Timo Walther
> Priority: Minor
> Labels: documentation, key, type-converter
>
> The [Flink documentation about data
> types|https://ci.apache.org/projects/flink/flink-docs-release-1.6/dev/types_serialization.html]
> should be extended with a discussion about the handling of null keys. See
> discussion at
> http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/Group-by-with-null-keys-td24594.html
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