[jira] [Created] (FLINK-3469) Fix documentation for grouping keys

[Shang Yuanchun (Jira)]

Greg Hogan created FLINK-3469:
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             Summary: Fix documentation for grouping keys
                 Key: FLINK-3469
                 URL: https://issues.apache.org/jira/browse/FLINK-3469
             Project: Flink
          Issue Type: Bug
          Components: Documentation
    Affects Versions: 1.0.0
            Reporter: Greg Hogan
            Assignee: Greg Hogan
             Fix For: 1.0.0


The transformation documentation for "Reduce on DataSet Grouped by KeySelector Function" uses a field expression in the Java example.

There are four ways to specify keys and only two have named examples in the documentation. Expand the documentation to cover all cases.



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