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Posted to issues@arrow.apache.org by "Wes McKinney (JIRA)" <ji...@apache.org> on 2019/02/14 07:01:00 UTC

[jira] [Created] (ARROW-4567) [C++] Convert Scalar values to Array values with length 1

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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