Github user MaxGekk commented on a diff in the pull request:
https://github.com/apache/spark/pull/22379#discussion_r224846183
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/ExprUtils.scala
---
@@ -0,0 +1,45 @@
+/*
+ * 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.util.ArrayBasedMapData
+import org.apache.spark.sql.types.{MapType, StringType, StructType}
+
+object ExprUtils {
+
+ def evalSchemaExpr(exp: Expression): StructType = exp match {
--- End diff --
The difference between the two functions appeared when I modified
`evalSchemaExpr` in `JsonExprUtils` to support `schema_of_json`. When we rebase
and prepare `schema_of_csv` in the PR
https://github.com/apache/spark/pull/22666, we will merge those two functions.
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