[jira] [Commented] (FLINK-25614) Let LocalWindowAggregate be chained with upstream

["Martijn Visser (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-25614?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17473102#comment-17473102 ] 

Martijn Visser commented on FLINK-25614:
----------------------------------------

[~jingzhang] What do you think?

> Let LocalWindowAggregate be chained with upstream
> -------------------------------------------------
>
>                 Key: FLINK-25614
>                 URL: https://issues.apache.org/jira/browse/FLINK-25614
>             Project: Flink
>          Issue Type: Improvement
>          Components: Table SQL / Runtime
>    Affects Versions: 1.14.2
>            Reporter: Q Kang
>            Priority: Minor
>              Labels: pull-request-available
>
> 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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