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https://issues.apache.org/jira/browse/FLINK-25614?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17484109#comment-17484109
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Jing Zhang commented on FLINK-25614:
------------------------------------
Fixed in master: d46548c5024c4c47d6e52168e1d92c68d3ce58f8
> Let LocalWindowAggregate be chained with upstream
> -------------------------------------------------
>
> Key: FLINK-25614
> URL: https://issues.apache.org/jira/browse/FLINK-25614
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / Runtime
> Affects Versions: 1.14.2
> Reporter: Q Kang
> Assignee: Q Kang
> Priority: Minor
> Labels: pull-request-available
> Fix For: 1.15.0
>
>
> When enabling two-phase aggregation (local-global) strategy for Window TVF,
> the physical plan is shown as follows:
> {code:java}
> TableSourceScan -> Calc -> WatermarkAssigner -> Calc
> ||
> || [FORWARD]
> ||
> LocalWindowAggregate
> ||
> || [HASH]
> ||
> GlobalWindowAggregate
> ||
> ||
> ...{code}
> We can let the `LocalWindowAggregate` node be chained with upstream operators
> in order to improve efficiency, just like the non-windowing counterpart
> `LocalGroupAggregate`.
>
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