[C++] Adding Aggregate Relation ToProto
- Dominant language
- C++
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Description
Adding `ToProto` functionality for Aggregate operator in Substrait. The resultant component is re-creating a `aggregate` operator in ACERO via the received Substrait-relation.
**Reporter**: [Vibhatha Lakmal Abeykoon](https://issues.apache.org/jira/browse/ARROW-16859) / @vibhatha
**Note**: *This issue was originally created as [ARROW-16859](https://issues.apache.org/jira/browse/ARROW-16859). Please see the [migration documentation](https://github.com/apache/arrow/issues/14542) for further details.*
Contributor guide
Research direction
Start by tracing the Aggregate operator's Substrait relation and the ACERO path that reconstructs an aggregate operator. Confirm how ToProto functionality is expected to connect those paths, then verify that an aggregate relation can round-trip through Substrait and recreate the corresponding ACERO operator.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp
- Domain
- data-engineering
- Issue type
- Feature
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100