Remote partitioned table pruning

There seems to be little information available regarding remote partitioned table pruning. Oracle doc describes how remote (distributed) SQL is executed, but does not mention anything about remote partitioned table, especially when will Oralce push down partition key to remote database to allow pruning and when will not.

I have seen Oracle does remote partition pruning for very simple predicates on the partition key, say equality/inequality condition with constant, but not in the case when such predicate involves lookup to another table, which is very common in the data warehouse environment. I will try to produce a simple case to illustrate this issue.

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