[ARROW-16858] [C++] Adding Join Relation ToProto

• Type: Sub-task
• Status: Open
• Priority: Major
• Resolution: Unresolved
• External issue URL: https://github.com/apache/arrow/issues/32183
• Assignee: Unassigned
• Reporter: Vibhatha Lakmal Abeykoon
• Created: 20/Jun/22 01:09
• Updated: 11/Jan/23 11:47

Description

Adding `ToProto` functionality for Join operator in Substrait. The resultant component is re-creating a `hash_join` operator in ACERO via the received Substrait-relation.