dbtsai commented on issue #27728: [SPARK-25556][SPARK-17636][SPARK-31026][SPARK-31060][SQL][test-hive1.2] Nested Column Predicate Pushdown for Parquet URL: https://github.com/apache/spark/pull/27728#issuecomment-607021780 For the worst case, we don't see extra overhead from parquet side. I agree that we should have benchmark suite for best (filtering out everything in a row group) and the worst case that nothing is filtered out in a row group.
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