[ARROW-13310] [C++] Implement hash_aggregate mode kernel

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: C++
• Labels: kernel
• External issue URL: https://github.com/apache/arrow/issues/28986
• Assignee: Unassigned
• Reporter: David Li
• Created: 12/Jul/21 14:31
• Updated: 11/Jan/23 08:32

Description

Requires ARROW-12759.

We have a scalar aggregate kernel for this already and hopefully the implementation can be reused. Note, Pandas actually doesn't expose this in DataFrameGroupBy.

Issue Links

• is a child of: ARROW-13339 [C++] Implement hash_aggregate kernels (umbrella issue)