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https://issues.apache.org/jira/browse/ARROW-11749?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Arrow JIRA Bot reassigned ARROW-11749:
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Assignee: (was: Ben Kietzman)
> [C++][Dataset] Support projections between children of UnionDatasets
> --------------------------------------------------------------------
>
> Key: ARROW-11749
> URL: https://issues.apache.org/jira/browse/ARROW-11749
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Affects Versions: 3.0.0
> Reporter: Ben Kietzman
> Priority: Major
> Labels: dataset
>
> ARROW-11174 adds support for arbitrary expressions in projection. It'd be
> useful to have that power when unifying disparate child datasets. For
> example, even the simple case where a column is renamed in a newer data file
> currently cannot be accommodated.
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