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https://issues.apache.org/jira/browse/ARROW-1574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17343155#comment-17343155
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Antoine Pitrou commented on ARROW-1574:
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[~edponce]
> [C++] Implement kernel function that converts a dense array to dictionary
> given known dictionary
> ------------------------------------------------------------------------------------------------
>
> Key: ARROW-1574
> URL: https://issues.apache.org/jira/browse/ARROW-1574
> Project: Apache Arrow
> Issue Type: New Feature
> Components: C++
> Reporter: Wes McKinney
> Priority: Major
> Labels: Analytics
>
> This may simply be a special case of cast using a dictionary type
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