Github user HyukjinKwon commented on the pull request:
https://github.com/apache/spark/pull/10805#issuecomment-173022112
I see. I will anyway try to figure this out though. I somehow this might be
a bit too much as almost all files would have proper extensions and I think the
(almost) only exception might be files initially uploaded by users to a file
system.
Maybe I am missing something though. I don't think users would not give
wrong extensions for the files but set compression codec for reading properly,
in particular, when they use HDFS because AKAIK Hadoop supports reading
compressed files by extension. I feel like they might have to give proper
extensions.
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