[ARROW-7179] [C++][Compute] Consolidate fill_null and coalesce

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.15.1
• Fix Version/s: 6.0.0
• Component/s: C++
• Labels: analytics kernel pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/23478
• Assignee: David Li
• Reporter: Ben Kietzman
• Created: 15/Nov/19 16:04
• Updated: 11/Jan/23 07:52
• Resolved: 27/Aug/21 09:52

Description

fill_null and coalesce are essentially the same kernel, except the former is binary and doesn't support an array fill value, and the latter is variadic and supports scalar and array fill values.

We should consolidate them into one kernel, picking the faster implementation.

Issue Links

• duplicates: ARROW-13136 [C++] Add a "coalesce" variadic scalar kernel
• is a child of: ARROW-8894 [C++] C++ array kernels framework and execution buildout (umbrella issue)
• links to: GitHub Pull Request #10987