Github user viirya commented on the pull request:
https://github.com/apache/spark/pull/7238#issuecomment-126165915
@liancheng Thank you for clarifying.
It is no problem to me. In fact, at the beginning of this PR, it is
proposed to only merge summary files and skip all part-files. This
configuration is the one for gaining better performance when reading a lot of
Parquet files. It is disabled by default and we document it as users should
very be sure what it means before they turn on it. I also agreed that we can't
take care of so many cases that we can't find the summary files along with
part-files. Thus your suggestion is better for me for this PR.
I will update this soon.
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