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https://issues.apache.org/jira/browse/FLINK-23544?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17408775#comment-17408775
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JING ZHANG edited comment on FLINK-23544 at 9/2/21, 12:26 PM:
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[~godfreyhe] [~twalthr] [~jark]
Hi all, I'm so sorry about introduce syntax error in the pr. I agree with you
to revert the session window TVF in 1.14, and continue to add correct syntax of
Window TVF in 1.15. I would track the issue in FLINK-24024
I would try to follow up the CALCITE-4337.
was (Author: qingru zhang):
[~godfreyhe] [~twalthr] [~jark]
Hi all, I agree with you to revert the session window TVF in 1.14, and continue
to add correct syntax of Window TVF in 1.15. I would track the issue in
FLINK-24024
I would try to follow up the CALCITE-4337.
> Window TVF Supports session window
> ----------------------------------
>
> Key: FLINK-23544
> URL: https://issues.apache.org/jira/browse/FLINK-23544
> Project: Flink
> Issue Type: Sub-task
> Components: Table SQL / Planner
> Reporter: JING ZHANG
> Assignee: JING ZHANG
> Priority: Minor
> Labels: pull-request-available
> Fix For: 1.14.0
>
>
> Window TVF would support SESSION window in the following case:
> # SESSION Window TVF followed by Window Aggregate, in this case SESSION
> window TVF would be pulled up into WindowAggregate, so Window assigner would
> happen in WindowAggrgeate
>
> *Note, SESSION window TVF only works in limited cases currently, the
> following user cases is not supported yet:*
> # *SESSION WINDOW TVF followed by Window JOIN*
> # *SESSION WINDOW TVF followed by Window RANK***
> *BESIDES, SESSION window Aggregate does not support the following performance
> improvement yet:*
> 1. Split Distinct Aggregation
> 2. Local-global Aggregation
> 3. Mini-batch Aggregate
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