[ARROW-18279] [C++][Python] Implement HashAggregate UDF

• Type: Sub-task
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Fix Version/s: 11.0.0
• Component/s: C++, Python
• External issue URL: https://github.com/apache/arrow/issues/33457
• Assignee: Vibhatha Lakmal Abeykoon
• Reporter: Vibhatha Lakmal Abeykoon
• Created: 08/Nov/22 04:14
• Updated: 11/Jan/23 11:59

Description

Implementing hash-aggregate user-defined functions and use these functions with `group_by`/ `agg` operations.