diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/debug/package.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/debug/package.scala
index c6fbd6d2f6930..cd056d98e3763 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/debug/package.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/debug/package.scala
@@ -107,7 +107,9 @@ package object debug {
             var i = 0
             while (i < numColumns) {
               val value = currentRow(i)
-              columnStats(i).elementTypes += HashSet(value.getClass.getName)
+              if (value != null) {
+                columnStats(i).elementTypes += HashSet(value.getClass.getName)
+              }
               i += 1
             }
             currentRow