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https://issues.apache.org/jira/browse/ARROW-1485?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wes McKinney resolved ARROW-1485.
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Resolution: Fixed
Assignee: Wes McKinney
Fix Version/s: 0.8.0
This was initially done in
https://github.com/apache/arrow/commit/f2806fa518583907a129b2ecb0b7ec8758b69e17
> [C++] Implement union-like data type for accommodating kernel arguments which
> may be scalars or arrays
> ------------------------------------------------------------------------------------------------------
>
> Key: ARROW-1485
> URL: https://issues.apache.org/jira/browse/ARROW-1485
> Project: Apache Arrow
> Issue Type: New Feature
> Components: C++
> Reporter: Wes McKinney
> Assignee: Wes McKinney
> Priority: Major
> Fix For: 0.8.0
>
>
> For example, either argument to the binary operator {{Add}} may be scalar or
> array. Some systems have addressed this issue by using arrays of length 1,
> but I would prefer that we accommodate this in Arrow's C++ data types
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