[jira] [Created] (ARROW-13966) [C++] Comparison kernel(s) for decimals

["Jonathan Keane (Jira)" <ji...@apache.org>]

Jonathan Keane created ARROW-13966:
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             Summary: [C++] Comparison kernel(s) for decimals
                 Key: ARROW-13966
                 URL: https://issues.apache.org/jira/browse/ARROW-13966
             Project: Apache Arrow
          Issue Type: Improvement
          Components: C++
            Reporter: Jonathan Keane


Even decimal-decimal comparisons return an error:

{code:r}
> Scalar$create(1.5)$cast(decimal(15, 2)) > Scalar$create(1.1)$cast(decimal(15, 2))
Error: NotImplemented: Function greater has no kernel matching input types (scalar[decimal128(15, 2)], scalar[decimal128(15, 2)])
{code}

Ideally, we would also be able to (autocast in order to) compare decimal-float or decimal-integer.



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