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https://issues.apache.org/jira/browse/ARROW-1487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16302973#comment-16302973
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ASF GitHub Bot commented on ARROW-1487:
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Licht-T commented on issue #1383: ARROW-1487: [C++] Implement casts from
List<A> to List<B>, where a cast function is defined from any A to B
URL: https://github.com/apache/arrow/pull/1383#issuecomment-353809520
Thnaks @wesm! I understand why normal `CastKernel` and `ListCastKernel` are
needed separately.
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> [C++] Implement casts from List<A> to List<B>, where a cast function is
> defined from any A to B
> -----------------------------------------------------------------------------------------------
>
> Key: ARROW-1487
> URL: https://issues.apache.org/jira/browse/ARROW-1487
> Project: Apache Arrow
> Issue Type: New Feature
> Components: C++
> Reporter: Wes McKinney
> Assignee: Licht Takeuchi
> Labels: pull-request-available
> Fix For: 0.8.0
>
>
> If a cast rule for the child type is not implemented, the failure should
> occur during kernel selection rather than at kernel evaluation time.
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