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https://issues.apache.org/jira/browse/FLINK-21310?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tianshi Zhu updated FLINK-21310:
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Affects Version/s: 1.12.0
> unexpected behavior of DataFrame union
> --------------------------------------
>
> Key: FLINK-21310
> URL: https://issues.apache.org/jira/browse/FLINK-21310
> Project: Flink
> Issue Type: Bug
> Affects Versions: 1.12.0
> Reporter: Tianshi Zhu
> Priority: Major
>
> [https://gist.github.com/tianshizz/fd1bdbcc4676783b7300984c0bf532c1]
> The gist shows two unit tests. In one of them, a data stream unions with
> itself. In the other, two identical data streams are unioned. However, the
> two operations will lead to different end results, which seems surprising to
> me. Is this expected? Could someone help me understand the different
> behaviors here?
>
> Thanks!
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