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ASF GitHub Bot commented on FLINK-3174: --------------------------------------- Github user StephanEwen commented on the pull request: https://github.com/apache/flink/pull/1802#issuecomment-205384005 Concerning the removal of the non-keyed window operator: Does that mean that the user functions now see the dummy key? > Add merging WindowAssigner > -------------------------- > > Key: FLINK-3174 > URL: https://issues.apache.org/jira/browse/FLINK-3174 > Project: Flink > Issue Type: Improvement > Components: Streaming > Reporter: Aljoscha Krettek > Assignee: Aljoscha Krettek > Fix For: 1.0.0 > > > We should add the possibility for WindowAssigners to merge windows. This will > enable Session windowing support, similar to how Google Cloud Dataflow > supports. > For session windows, each element would initially be assigned to its own > window. When triggering we check the windows and see if any can be merged. > This way, elements with overlapping session windows merge into one session. -- This message was sent by Atlassian JIRA (v6.3.4#6332)