HyukjinKwon commented on a change in pull request #33096:
URL: https://github.com/apache/spark/pull/33096#discussion_r659403923



##########
File path: 
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/V2ExpressionUtils.scala
##########
@@ -0,0 +1,80 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.catalyst.expressions
+
+import org.apache.spark.sql.AnalysisException
+import org.apache.spark.sql.catalyst.SQLConfHelper
+import org.apache.spark.sql.catalyst.analysis.Resolver
+import org.apache.spark.sql.catalyst.plans.logical.LogicalPlan
+import org.apache.spark.sql.connector.expressions.{Expression => V2Expression, 
FieldReference, IdentityTransform, NamedReference, NullOrdering => 
V2NullOrdering, SortDirection => V2SortDirection, SortValue}
+import org.apache.spark.sql.errors.QueryCompilationErrors
+
+/**
+ * A utility class that converts public connector expressions into Catalyst 
expressions.
+ */
+private[sql] object V2ExpressionUtils extends SQLConfHelper {

Review comment:
       We won't have to do `private[sql]` since catalyst module is:
   
   > All classes in catalyst are considered an internal API to Spark SQL
   
   These were all removed from SPARK-16813




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