[jira] [Created] (FLINK-4029) Multi-field "sum" function just like "keyBy"

[Shang Yuanchun (Jira)]

Rami created FLINK-4029:
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             Summary: Multi-field "sum" function just like "keyBy"
                 Key: FLINK-4029
                 URL: https://issues.apache.org/jira/browse/FLINK-4029
             Project: Flink
          Issue Type: Improvement
          Components: DataStream API
            Reporter: Rami
            Priority: Minor


I can use keyBy as follows:
stream.keyBy(“pojo.field1”,”pojo.field2”,…)
Would make sense that I can use sum for example, to do its job for more than one field:
stream.sum(“pojo.field1”,”pojo.field2”,…)



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