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https://issues.apache.org/jira/browse/ARROW-9783?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andy Grove resolved ARROW-9783.
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Resolution: Fixed
Issue resolved by pull request 7988
[https://github.com/apache/arrow/pull/7988]
> [Rust] [DataFusion] Logical aggregate expressions require explicit data type
> ----------------------------------------------------------------------------
>
> Key: ARROW-9783
> URL: https://issues.apache.org/jira/browse/ARROW-9783
> Project: Apache Arrow
> Issue Type: Bug
> Components: Rust, Rust - DataFusion
> Reporter: Andy Grove
> Assignee: Andy Grove
> Priority: Major
> Labels: pull-request-available
> Fix For: 2.0.0
>
> Time Spent: 1h
> Remaining Estimate: 0h
>
> When constructing a logical plan either directly or via the DataFrame API, it
> is not possible to construct an aggregate expression without providing a data
> type. This makes no sense because the aggregate functions need to determine
> their own data type.
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