diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/ColumnType.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/ColumnType.scala
index 703bde2531..5cfb003e4f 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/ColumnType.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/ColumnType.scala
@@ -684,7 +684,7 @@ private[columnar] object ColumnType {
       case struct: StructType => STRUCT(struct)
       case udt: UserDefinedType[_] => apply(udt.sqlType)
       case other =>
-        throw new Exception(s"Unsupported type: $other")
+        throw new Exception(s"Unsupported type: ${other.simpleString}")
     }
   }
 }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/ColumnTypeSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/ColumnTypeSuite.scala
index 5f2a3aaff6..ff05049551 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/ColumnTypeSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/ColumnTypeSuite.scala
@@ -144,4 +144,18 @@ class ColumnTypeSuite extends SparkFunSuite with Logging {
       ColumnType(DecimalType(19, 0))
     }
   }
+
+  test("show type name in type mismatch error") {
+    val invalidType = new DataType {
+        override def defaultSize: Int = 1
+        override private[spark] def asNullable: DataType = this
+        override def typeName: String = "invalid type name"
+    }
+
+    val message = intercept[java.lang.Exception] {
+      ColumnType(invalidType)
+    }.getMessage
+
+    assert(message.contains("Unsupported type: invalid type name"))
+  }
 }