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https://issues.apache.org/jira/browse/FLINK-4029?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15410705#comment-15410705
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Ivan Mushketyk commented on FLINK-4029:
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Hi,
Can anyone give an advice about how this should be implemented?
> 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
> Assignee: Ivan Mushketyk
> 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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