ORC-1482: Adaptation to read ORC files created by CUDF

This pr is aimed at adapting to read ORC files created by CUDF, which may have missing statistics in their DOUBLE/FLOAT columns.

Official ORC readers can't read CUDF-created ORC files properly.

Added UT.

Closes #1598 from guiyanakuang/ORC-1482-to-1.8.

Authored-by: Yiqun Zhang <guiyanakuang@gmail.com>
Signed-off-by: Dongjoon Hyun <dongjoon@apache.org>

java/core/src/java/org/apache/orc/impl/RecordReaderImpl.java

@@ -650,8 +650,8 @@ static TruthValue evaluatePredicateProto(OrcProto.ColumnStatistics statsProto,
                    " include ORC-517. Writer version: {}",
           predicate.getColumnName(), writerVersion);
       return TruthValue.YES_NO_NULL;
-    } else if (category == TypeDescription.Category.DOUBLE
-        || category == TypeDescription.Category.FLOAT) {
+    } else if ((category == TypeDescription.Category.DOUBLE ||
+        category == TypeDescription.Category.FLOAT) && cs instanceof DoubleColumnStatistics) {
       DoubleColumnStatistics dstas = (DoubleColumnStatistics) cs;
       if (Double.isNaN(dstas.getSum())) {
         LOG.debug("Not using predication pushdown on {} because stats contain NaN values",
@@ -1654,4 +1654,12 @@ public CompressionCodec getCompressionCodec() {
   public int getMaxDiskRangeChunkLimit() {
     return maxDiskRangeChunkLimit;
   }
+
+  /**
+   * Get sargApplier for testing.
+   * @return sargApplier in record reader.
+   */
+  SargApplier getSargApp() {
+    return sargApp;
+  }
 }

java/core/src/test/org/apache/orc/impl/TestRecordReaderImpl.java

@@ -41,6 +41,7 @@
 import org.apache.orc.CompressionCodec;
 import org.apache.orc.CompressionKind;
 import org.apache.orc.DataReader;
+import org.apache.orc.DoubleColumnStatistics;
 import org.apache.orc.OrcConf;
 import org.apache.orc.OrcFile;
 import org.apache.orc.OrcProto;