[jira] [Created] (FLINK-20517) Disallow operators with mixed key/non-keyed inputs with BATCH state backend

[Shang Yuanchun (Jira)]

Dawid Wysakowicz created FLINK-20517:
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             Summary: Disallow operators with mixed key/non-keyed inputs with BATCH state backend
                 Key: FLINK-20517
                 URL: https://issues.apache.org/jira/browse/FLINK-20517
             Project: Flink
          Issue Type: Bug
          Components: API / DataStream
    Affects Versions: 1.12.0
            Reporter: Dawid Wysakowicz
            Assignee: Dawid Wysakowicz
             Fix For: 1.12.1


Using the batch state backend requires that the inputs are sorted by key. Right now we can not sort multiple inputs if at least on of the inputs is not keyed.

We should throw an exception if such a combination is used.



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