[SPARK-45573][SQL] Assign name to the error _LEGACY_ERROR_TEMP_2153

common/utils/src/main/resources/error/error-classes.json

@@ -3015,6 +3015,12 @@
     ],
     "sqlState" : "4274K"
   },
+  "UNEXPECTED_SERIALIZER_FOR_CLASS" : {
+    "message" : [
+      "The class <className> has an unexpected expression serializer. Expects \"STRUCT\" or \"IF\" which returns \"STRUCT\" but found <expr>."
+    ],
+    "sqlState" : "42846"
+  },
   "UNKNOWN_PROTOBUF_MESSAGE_TYPE" : {
     "message" : [
       "Attempting to treat <descriptorName> as a Message, but it was <containingType>."
@@ -5715,11 +5721,6 @@
       "<expressions>."
     ]
   },
-  "_LEGACY_ERROR_TEMP_2153" : {
-    "message" : [
-      "class <clsName> has unexpected serializer: <objSerializer>."
-    ]
-  },
   "_LEGACY_ERROR_TEMP_2154" : {
     "message" : [
       "Failed to get outer pointer for <innerCls>."

docs/sql-error-conditions.md

@@ -1941,6 +1941,12 @@ Parameter `<paramIndex>` of function `<functionName>` requires the `<requiredTyp
 
 Cannot invoke function `<functionName>` because it contains positional argument(s) following the named argument assigned to `<parameterName>`; please rearrange them so the positional arguments come first and then retry the query again.
 
+### UNEXPECTED_SERIALIZER_FOR_CLASS
+
+[SQLSTATE: 42846](sql-error-conditions-sqlstates.html#class-42-syntax-error-or-access-rule-violation)
+
+The class `<className>` has an unexpected expression serializer. Expects "STRUCT" or "IF" which returns "STRUCT" but found `<expr>`.
+
 ### UNKNOWN_PROTOBUF_MESSAGE_TYPE
 
 [SQLSTATE: 42K0G](sql-error-conditions-sqlstates.html#class-42-syntax-error-or-access-rule-violation)

sql/catalyst/src/main/scala/org/apache/spark/sql/errors/QueryExecutionErrors.scala

@@ -1362,10 +1362,10 @@ private[sql] object QueryExecutionErrors extends QueryErrorsBase with ExecutionE
   def classHasUnexpectedSerializerError(
       clsName: String, objSerializer: Expression): SparkRuntimeException = {
     new SparkRuntimeException(
-      errorClass = "_LEGACY_ERROR_TEMP_2153",
+      errorClass = "UNEXPECTED_SERIALIZER_FOR_CLASS",
       messageParameters = Map(
-        "clsName" -> clsName,
-        "objSerializer" -> objSerializer.toString()))
+        "className" -> clsName,
+        "expr" -> toSQLExpr(objSerializer)))
   }
 
   def unsupportedOperandTypeForSizeFunctionError(

sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoderSuite.scala

@@ -25,19 +25,20 @@ import scala.collection.mutable.ArrayBuffer
 import scala.reflect.runtime.universe.TypeTag
 
 import org.apache.spark.{SPARK_DOC_ROOT, SparkArithmeticException, SparkRuntimeException, SparkUnsupportedOperationException}
-import org.apache.spark.sql.{Encoder, Encoders}
+import org.apache.spark.sql.{Encoder, Encoders, Row}
 import org.apache.spark.sql.catalyst.{FooClassWithEnum, FooEnum, OptionalData, PrimitiveData, ScroogeLikeExample}
 import org.apache.spark.sql.catalyst.analysis.AnalysisTest
 import org.apache.spark.sql.catalyst.dsl.plans._
-import org.apache.spark.sql.catalyst.expressions.AttributeReference
+import org.apache.spark.sql.catalyst.expressions.{AttributeReference, NaNvl}
 import org.apache.spark.sql.catalyst.plans.CodegenInterpretedPlanTest
 import org.apache.spark.sql.catalyst.plans.logical.LocalRelation
 import org.apache.spark.sql.catalyst.types.DataTypeUtils.toAttributes
 import org.apache.spark.sql.catalyst.util.ArrayData
+import org.apache.spark.sql.errors.QueryErrorsBase
 import org.apache.spark.sql.internal.SQLConf
 import org.apache.spark.sql.types._
 import org.apache.spark.unsafe.types.{CalendarInterval, UTF8String}
-import org.apache.spark.util.ClosureCleaner
+import org.apache.spark.util.{ClosureCleaner, Utils}
 
 case class RepeatedStruct(s: Seq[PrimitiveData])
 
@@ -138,7 +139,8 @@ case class OptionNestedGeneric[T](list: Option[T])
 case class MapNestedGenericKey[T](list: Map[T, Int])
 case class MapNestedGenericValue[T](list: Map[Int, T])
 
-class ExpressionEncoderSuite extends CodegenInterpretedPlanTest with AnalysisTest {
+class ExpressionEncoderSuite extends CodegenInterpretedPlanTest with AnalysisTest
+  with QueryErrorsBase {
   OuterScopes.addOuterScope(this)
 
   implicit def encoder[T : TypeTag]: ExpressionEncoder[T] = verifyNotLeakingReflectionObjects {
@@ -576,6 +578,25 @@ class ExpressionEncoderSuite extends CodegenInterpretedPlanTest with AnalysisTes
     assert(e.getMessage.contains("tuple with more than 22 elements are not supported"))
   }
 
+  test("throw exception for unexpected serializer") {
+    val schema = new StructType()
+      .add("key", StringType)
+      .add("value", BinaryType)
+
+    val encoder = ExpressionEncoder(schema, lenient = true)
+    val unexpectedSerializer = NaNvl(encoder.objSerializer, encoder.objSerializer)
+    val exception = intercept[org.apache.spark.SparkRuntimeException] {
+      new ExpressionEncoder[Row](unexpectedSerializer, encoder.objDeserializer, encoder.clsTag)
+    }
+    checkError(
+      exception = exception,
+      errorClass = "UNEXPECTED_SERIALIZER_FOR_CLASS",
+      parameters = Map(
+        "className" -> Utils.getSimpleName(encoder.clsTag.runtimeClass),
+        "expr" -> toSQLExpr(unexpectedSerializer))
+    )
+  }
+
   encodeDecodeTest((1, FooEnum.E1), "Tuple with Int and scala Enum")
   encodeDecodeTest((null, FooEnum.E1, FooEnum.E2), "Tuple with Null and scala Enum")
   encodeDecodeTest(Seq(FooEnum.E1, null), "Seq with scala Enum")