[ARROW-15592] [C++] Add support for custom output field names in a substrait::PlanRel

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 11.0.0
• Component/s: C++
• Labels: pull-request-available substrait
• External issue URL: https://github.com/apache/arrow/issues/31055
• Assignee: Vibhatha Lakmal Abeykoon
• Reporter: Weston Pace
• Created: 05/Feb/22 02:40
• Updated: 11/Jan/23 11:38
• Resolved: 14/Dec/22 08:28

Description

A Substrait plan consists of multiple relations. Some (only one?) of those relations can be "root" relations which means they name the output fields. We currently do not support this. It should be a straightforward projection to assign the field names.

Issue Links

• links to: GitHub Pull Request #14292