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https://issues.apache.org/jira/browse/ARROW-8630?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ben Kietzman resolved ARROW-8630.
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Resolution: Fixed
> [C++][Dataset] Pass schema including all materialized fields to catch CSV
> edge cases
> ------------------------------------------------------------------------------------
>
> Key: ARROW-8630
> URL: https://issues.apache.org/jira/browse/ARROW-8630
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Affects Versions: 0.17.0
> Reporter: Ben Kietzman
> Assignee: Ben Kietzman
> Priority: Major
> Labels: dataset
> Fix For: 4.0.0
>
>
> see discussion here
> https://github.com/apache/arrow/pull/7033#discussion_r416941674
> Fields filtered but not projected will revert to their inferred type,
> whatever their dataset's schema may be. This can cause validated filters to
> fail due to type disagreements
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