Dandandan commented on PR #3991:
URL:
https://github.com/apache/arrow-datafusion/pull/3991#issuecomment-1294557625
@Jefffrey the physical nodes have information on them
(`output_partitioning`) that enables retrieving the child partitioning and
seeing that an extra repartitioning will not change it, doing it in a more
generic way wether there is a filter, projection, aggregate, join in between.
See PR from @mingmwang
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