Github user hvanhovell commented on the issue:
https://github.com/apache/spark/pull/21005
@maropu it seems a bit of overkill to add a separate trait for this, it
also kinda nullifies the effect of this PR.
As for the `CalendarInterval`'s support for `divide` and `multiply`. These
operations have not been implemented yet, and - correct me if I am wrong -
involve a `CalendarInterval` on the left side and an `Integral` on the right
side; this violates the contract of `BinaryArithmetic`. Anyway I am not opposed
to this, but I think we should do this as a part of a separate JIRA/PR.
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