Github user HyukjinKwon commented on a diff in the pull request: https://github.com/apache/spark/pull/10502#discussion_r48593890 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetRelation.scala --- @@ -288,20 +293,28 @@ private[sql] class ParquetRelation( } } + override def unhandledFilters(filters: Array[Filter]): Array[Filter] = { + // The unsafe row RecordReader does not support row by row filtering so for this case + // it should wrap this with Spark-side filtering. + val enableUnsafeRowParquetReader = + sqlContext.getConf(SQLConf.PARQUET_UNSAFE_ROW_RECORD_READER_ENABLED.key).toBoolean --- End diff -- Hm.. I think we can implement this for now and then simply change the condition when `UnsafeRowParquetRecordReader` supports filtering row by row. The option for Parquet filter push down was also false by default but it was implemented. I don't think a default value can deicde if a feature should be implemented or not.
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