[ARROW-13295] [C++] Implement hash_aggregate mean/stdev/variance kernels

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 6.0.0
• Component/s: C++
• Labels: kernel pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/18738
• Assignee: David Li
• Reporter: David Li
• Created: 09/Jul/21 15:34
• Updated: 11/Jan/23 08:32
• Resolved: 02/Aug/21 14:19

Description

We have scalar aggregate kernels for these already that can serve as the basis for a hash aggregate implementation.

Depends on ARROW-12759 as that refactors  how hash aggregate kernels are implemented.

Issue Links

• is a child of: ARROW-13339 [C++] Implement hash_aggregate kernels (umbrella issue)
• links to: GitHub Pull Request #10792