Find Monotonic Column in GROUP BY

[Chinmay Kolhatkar]

Dear Community,

I'm trying to add support for GROUP BY clause in Apache Apex-Calcite
integration.

I am assuming that calcite knows which is the monotonic column because
query fails to parse if there is no monotonic column present in group set.

Is there any way to find out which is the monotonic column in the GROUP BY
clause from Aggregate/LogicalAggregate object?

Thanks,
Chinmay.