Github user maropu commented on a diff in the pull request:
https://github.com/apache/spark/pull/10502#discussion_r48593431
--- 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 --
Since `SQLConf.PARQUET_UNSAFE_ROW_RECORD_READER_ENABLED` is internally true
by default, this `unhandledFilters` always returns `filters` as it is. So, this
optimization is little meaningful to end users.
IMO if `UnsafeRowParquetRecordReader` supports row-by-row filtering, then
we implement this.
Though?
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