findepi commented on code in PR #12536:
URL: https://github.com/apache/datafusion/pull/12536#discussion_r1768934156


##########
datafusion/expr-common/src/scalar.rs:
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@@ -0,0 +1,109 @@
+// 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.
+
+use arrow::{
+    array::{Array, ArrayRef},
+    datatypes::DataType,
+};
+use datafusion_common::{exec_err, DataFusionError, Result, ScalarValue};
+
+#[derive(Clone, Debug)]
+pub struct Scalar {
+    value: ScalarValue,
+    data_type: DataType,
+}
+
+impl From<ScalarValue> for Scalar {
+    fn from(value: ScalarValue) -> Self {
+        Self {
+            data_type: value.data_type(),
+            value,

Review Comment:
   This code shows that Scalar is a redundant wrapper around ScalarValue.
   I understand this is transitionary. Can we capture the desired move forward 
in the code?
   It's great if the code self-documents, but without any commentary this code 
self-documents itself as being redundant



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