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https://issues.apache.org/jira/browse/FLINK-25595?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17488661#comment-17488661
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godfrey he commented on FLINK-25595:
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This is an invalid issue. HashAgg is the best choose if all the agg function
has fixed-length agg buffer, otherwise SortAgg is the fallback choose. This is
the current behavior in the planner. cc [~monster#12][~jingzhang]
> Specify hash/sort aggregate strategy in SQL hint
> ------------------------------------------------
>
> Key: FLINK-25595
> URL: https://issues.apache.org/jira/browse/FLINK-25595
> Project: Flink
> Issue Type: Sub-task
> Components: Table SQL / Planner
> Reporter: Jing Zhang
> Assignee: ZhuoYu Chen
> Priority: Major
>
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