MaxGekk commented on issue #26973: [SPARK-30323][SQL] Support filters pushdown in CSV datasource URL: https://github.com/apache/spark/pull/26973#issuecomment-569323494 > If the pushed filters are converted to back Spark's expressions, I think there's no point of doing it (as Spark's optimizer should do that instead). @HyukjinKwon Spark's optimizer applies filters to an entire row fully converted to desired types but pushed filters are applied to some parts of the row. So, we can skip some value conversions.
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