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

["Wes McKinney (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-4567?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wes McKinney closed ARROW-4567.
-------------------------------
    Resolution: Won't Fix

We'll deal with Scalar as a first class citizen in the compute algebra for executing array kernels

> [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
>            Priority: Major
>
> 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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