[ARROW-1485] [C++] Implement union-like data type for accommodating kernel arguments which may be scalars or arrays

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.8.0
• Component/s: C++
• External issue URL: https://github.com/apache/arrow/issues/17505
• Assignee: Wes McKinney
• Reporter: Wes McKinney
• Created: 07/Sep/17 22:58
• Updated: 11/Jan/23 07:15
• Resolved: 21/Jan/18 21:19

Description

For example, either argument to the binary operator Add may be scalar or array. Some systems have addressed this issue by using arrays of length 1, but I would prefer that we accommodate this in Arrow's C++ data types