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https://issues.apache.org/jira/browse/ARROW-3767?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wes McKinney resolved ARROW-3767.
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Resolution: Fixed
Issue resolved by pull request 4196
[https://github.com/apache/arrow/pull/4196]
> [C++] Add cast for Null to any type
> -----------------------------------
>
> Key: ARROW-3767
> URL: https://issues.apache.org/jira/browse/ARROW-3767
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Uwe L. Korn
> Assignee: Antoine Pitrou
> Priority: Major
> Labels: pull-request-available
> Fix For: 0.14.0
>
> Time Spent: 4h 40m
> Remaining Estimate: 0h
>
> Casting a column from NullType to any other type is possible as the resulting
> array will also be all-null but simply with a different type annotation.
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