Github user AlekseiS commented on the issue:
https://github.com/apache/spark/pull/13893
@liancheng I think partition predicates are a bit different. If you
explicitly specify a partition predicate, like "date=2016-06-27", do you really
expect other partitions being scanned regardless of whether you use
non-deterministic function or not? Most likely, no, so if partition filter is
specified and it's deterministic it's expected to be always used.
For this reason, I think that it's always correct to push filters which
only reference partition columns to the scan. @jiangxb1987 do you think you
could modify the patch to do it?
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