Wes McKinney created ARROW-1485:
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Summary: [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
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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