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https://issues.apache.org/jira/browse/SPARK-10816?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jungtaek Lim resolved SPARK-10816.
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Fix Version/s: 3.2.0
Assignee: Jungtaek Lim
Resolution: Fixed
I'm resolving this issue as all sub-issues are completed.
> EventTime based sessionization (session window)
> -----------------------------------------------
>
> Key: SPARK-10816
> URL: https://issues.apache.org/jira/browse/SPARK-10816
> Project: Spark
> Issue Type: New Feature
> Components: Structured Streaming
> Reporter: Reynold Xin
> Assignee: Jungtaek Lim
> Priority: Major
> Fix For: 3.2.0
>
> Attachments: SPARK-10816 Support session window natively.pdf, Session
> Window Support For Structure Streaming.pdf
>
>
> Currently structured streaming supports two kinds of windows: tumbling window
> and sliding window. Another useful window function is session window. Which
> is not supported by SS.
> Unlike time window (tumbling window and sliding window), session window
> doesn't have static window begin and end time. Session window creation
> depends on defined session gap which can be static or dynamic.
> For static session gap, the events which are falling in a certain period of
> time (gap) are considered as a session window. A session window closes when
> it does not receive events for the gap. For dynamic gap, the gap could be
> changed from event to event.
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