Github user HyukjinKwon commented on the issue:
https://github.com/apache/spark/pull/14649
(As I am already here), I also think this should be helpful, in particular,
for S3 with Parquet. However, I am wondering if this might be only
Parquet-specific optimization. I mean, we don't have metafile for other file
based data sources.
So, my personal opinion is, to put this within Parquet without adding
another interface. If we can implement this for other data sources in the
future, I think we can add this interface in the future but not now.
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