[ARROW-9070] [C++] StructScalar needs field accessor methods

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Duplicate
• Fix Version/s: 1.0.0
• Component/s: C++
• External issue URL: https://github.com/apache/arrow/issues/25185
• Assignee: Unassigned
• Reporter: Neal Richardson
• Created: 08/Jun/20 15:59
• Updated: 11/Jan/23 08:04
• Resolved: 09/Jun/20 01:25

Description

The minmax compute function returns a struct with fields "min" and "max". So to write an R binding for the min() method on arrow objects, I call "minmax" and then take the "min" field from the result. However, at least from my reading of scalar.h compared with array_nested.h, there are no field/GetFieldByName/etc. methods for StructScalar, so I can't get it.