MaxGekk commented on code in PR #47522:
URL: https://github.com/apache/spark/pull/47522#discussion_r1740183686


##########
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/ObjectExpressionsSuite.scala:
##########
@@ -556,6 +556,43 @@ class ObjectExpressionsSuite extends SparkFunSuite with 
ExpressionEvalHelper {
       "java.lang.Integer is not a valid external type for schema of double")
   }
 
+  test("SPARK-49044 ValidateExternalType should return child in error") {
+    val inputObject = BoundReference(0, ObjectType(classOf[Row]), nullable = 
true)
+    Seq(
+      (true, BooleanType),
+      (2.toByte, ByteType),
+      (5.toShort, ShortType),
+      (23, IntegerType),
+      (61L, LongType),
+      (1.0f, FloatType),
+      (10.0, DoubleType),
+      ("abcd".getBytes, BinaryType),
+      ("abcd", StringType),
+      (BigDecimal.valueOf(10), DecimalType.IntDecimal),
+      (IntervalUtils.stringToInterval(UTF8String.fromString("interval 3 day")),
+        CalendarIntervalType),
+      (java.math.BigDecimal.valueOf(10), DecimalType.BigIntDecimal),
+      (Array(3, 2, 1), ArrayType(IntegerType))
+    ).foreach { case (input, dt) =>
+      val enc = RowEncoder.encoderForDataType(dt, lenient = false)
+      val validateType = ValidateExternalType(
+        GetExternalRowField(inputObject, index = 0, fieldName = "c0"),
+        dt,
+        EncoderUtils.lenientExternalDataTypeFor(enc))
+      checkObjectExprEvaluation(validateType, input, 
InternalRow.fromSeq(Seq(Row(input))))
+    }
+
+    checkExceptionInExpression[SparkRuntimeException](
+      ValidateExternalType(

Review Comment:
   Could you use the code to trigger the error, please.



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