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https://issues.apache.org/jira/browse/FLINK-3473?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Timo Walther closed FLINK-3473.
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Resolution: Won't Fix
Many of these ideas have been implemented in the new planner. Since the old
planner has been remove, I will close this issue now. Please reopen if you
think that this topic has not been addressed.
> Add partial aggregate support in Flink
> --------------------------------------
>
> Key: FLINK-3473
> URL: https://issues.apache.org/jira/browse/FLINK-3473
> Project: Flink
> Issue Type: Improvement
> Components: Table SQL / Legacy Planner
> Reporter: Chengxiang Li
> Priority: Minor
> Labels: auto-deprioritized-major, auto-unassigned
> Attachments: PartialAggregateinFlink_v1.pdf,
> PartialAggregateinFlink_v2.pdf
>
>
> For decomposable aggregate function, partial aggregate is more efficient as
> it significantly reduce the network traffic during shuffle and parallelize
> part of the aggregate calculation. This is an umbrella task for partial
> aggregate.
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