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https://issues.apache.org/jira/browse/IGNITE-18207?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17679137#comment-17679137
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Konstantin Orlov commented on IGNITE-18207:
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Hi, [~amashenkov]! I left a few comments. Please, take a look at PR

> Sql. Pushdown DISTINCT aggregate with no particular function
> ------------------------------------------------------------
>
>                 Key: IGNITE-18207
>                 URL: https://issues.apache.org/jira/browse/IGNITE-18207
>             Project: Ignite
>          Issue Type: Improvement
>          Components: sql
>            Reporter: Konstantin Orlov
>            Assignee: Andrey Mashenkov
>            Priority: Major
>              Labels: ignite-3
>             Fix For: 3.0.0-beta2
>
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> In order to reduce amount of rows to send over the network, for cases with 
> DISTINCT aggregates and no particular aggregation function, 
> IgniteAggregate[dist=single] can be copied to under the exchange with hash 
> distribution.



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