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https://issues.apache.org/jira/browse/ARROW-7245?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17116231#comment-17116231
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Wes McKinney commented on ARROW-7245:
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Perhaps Concatenate can be reimplemented as a vector kernel, so that type
promotions can be handled by the kernel execution machinery
> [C++] Allow automatic String -> LargeString promotions when concatenating
> tables
> --------------------------------------------------------------------------------
>
> Key: ARROW-7245
> URL: https://issues.apache.org/jira/browse/ARROW-7245
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Wes McKinney
> Priority: Major
>
> inspired by GitHub issue https://github.com/apache/arrow/issues/5874
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