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https://issues.apache.org/jira/browse/ARROW-13390?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17419508#comment-17419508
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David Li commented on ARROW-13390:
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No, 'choose' at least should be straightforward once this is done (they use the
same underlying helpers); 'replace_with_mask' may need some refactoring (it
should be able to use the same helpers). We should file separate issues.
> [C++] Improve type support for 'coalesce' kernel
> ------------------------------------------------
>
> Key: ARROW-13390
> URL: https://issues.apache.org/jira/browse/ARROW-13390
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: David Li
> Assignee: David Li
> Priority: Major
> Labels: kernel, pull-request-available, types
> Fix For: 6.0.0
>
> Time Spent: 2h 40m
> Remaining Estimate: 0h
>
> * Direct support for dictionaries (unifying dictionaries or building a new
> dictionary as necessary)
> * Fixed-length list
> * Union, struct, list, other variable-width types
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