Github user HyukjinKwon commented on the pull request:
https://github.com/apache/spark/pull/10750#issuecomment-171515046
Actually, I also suggested the way similar with this in
[SPARK-9182](https://issues.apache.org/jira/browse/SPARK-9182). If we keep
adding filters in this way, this could end up converting all expressions.Filter
to sources.Filter. This might mean we need to write a new expression library,
which might not worth the effort.
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