3c3b3d55 - DRILL-1434: In ParquetGroupScan compute the non-null value count of a column if stats are available for each chunk. Don't apply ConvertCountToDirectScan rule if stats are not available.
DRILL-1434: In ParquetGroupScan compute the non-null value count of a column if stats are available for each chunk. Don't apply ConvertCountToDirectScan rule if stats are not available.
