Aljoscha Krettek created FLINK-3174:
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Summary: 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.
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