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

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 6.0.0
• Component/s: C++
• Labels: kernel pull-request-available types
• External issue URL: https://github.com/apache/arrow/issues/29571
• Assignee: David Li
• Reporter: Jonathan Keane
• Created: 09/Sep/21 19:14
• Updated: 11/Jan/23 08:36
• Resolved: 13/Sep/21 13:23

Description

Even decimal-decimal comparisons return an error:

> 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)])

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

Issue Links

• is depended upon by: ARROW-13130 [C++][Compute] Add decimal support for arithmetic compute functions
• links to: GitHub Pull Request #11129