Wes McKinney created ARROW-4567:
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Summary: [C++] Convert Scalar values to Array values with length 1
Key: ARROW-4567
URL: https://issues.apache.org/jira/browse/ARROW-4567
Project: Apache Arrow
Issue Type: New Feature
Components: C++
Reporter: Wes McKinney
Fix For: 0.14.0
A common approach to performing operations on both scalar and array values is
to treat a Scalar as an array of length 1. For example, we cannot currently use
our Cast kernels to cast a Scalar. It would be senseless to create separate
kernel implementations specialized for a single value, and much easier to
promote a scalar to an Array, execute the kernel, then unbox the result back
into a Scalar
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