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https://issues.apache.org/jira/browse/IGNITE-20095?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrey Mashenkov resolved IGNITE-20095.
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    Resolution: Duplicate

Fixed within IGNITE-21580

> Sql. Map part of MAP/REDUCE aggregate sometimes can not be moved past 
> Exchange.
> -------------------------------------------------------------------------------
>
>                 Key: IGNITE-20095
>                 URL: https://issues.apache.org/jira/browse/IGNITE-20095
>             Project: Ignite
>          Issue Type: Improvement
>          Components: sql
>            Reporter: Maksim Zhuravkov
>            Priority: Minor
>              Labels: ignite-3
>
> See examples in MapReduceSortAggregatePlannerTest. 
> Looks like, Map aggregate can't utilize sorting from the input in some cases.



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