[jira] [Created] (FLINK-21310) unexpected behavior of DataFrame union

[Shang Yuanchun (Jira)]

Tianshi Zhu created FLINK-21310:
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             Summary: unexpected behavior of DataFrame union
                 Key: FLINK-21310
                 URL: https://issues.apache.org/jira/browse/FLINK-21310
             Project: Flink
          Issue Type: Bug
            Reporter: Tianshi Zhu


[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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