[ https://issues.apache.org/jira/browse/FLINK-4029?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15390679#comment-15390679 ]
Ivan Mushketyk commented on FLINK-4029: --------------------------------------- I am new to Flink, so I am a little bit confused about what would be the best way to implement this features. Should I implement it on top of existing operators/streams or should I add a new operator/stream? Should I add the "sum" method to DataStream class or to one of the specialized streams? > 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”,…) -- This message was sent by Atlassian JIRA (v6.3.4#6332)