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https://issues.apache.org/jira/browse/ARROW-6657?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andy Grove resolved ARROW-6657.
-------------------------------
Resolution: Fixed
Issue resolved by pull request 5513
[https://github.com/apache/arrow/pull/5513]
> [Rust] [DataFusion] Implement COUNT aggregate expression
> --------------------------------------------------------
>
> Key: ARROW-6657
> URL: https://issues.apache.org/jira/browse/ARROW-6657
> Project: Apache Arrow
> Issue Type: Sub-task
> Reporter: Andy Grove
> Priority: Major
> Labels: beginner, pull-request-available
> Fix For: 1.0.0
>
> Time Spent: 2h 40m
> Remaining Estimate: 0h
>
> Implement COUNT aggregate expressions. See the SUM implementation for
> inspiration.
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