SEPURI-SAI-KRISHNA commented on code in PR #28994:
URL: https://github.com/apache/flink/pull/28994#discussion_r3881550502


##########
flink-table/flink-table-common/src/test/java/org/apache/flink/table/types/inference/strategies/ObjectUpdateTypeStrategyTest.java:
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@@ -0,0 +1,91 @@
+/*
+ * 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.flink.table.types.inference.strategies;
+
+import org.apache.flink.table.api.DataTypes;
+import org.apache.flink.table.types.inference.TypeStrategiesTestBase;
+
+import java.util.stream.Stream;
+
+/** Tests for {@link ObjectUpdateTypeStrategy}. */
+class ObjectUpdateTypeStrategyTest extends TypeStrategiesTestBase {
+
+    private static final String USER_CLASS_PATH = "com.example.User";
+
+    @Override
+    protected Stream<TestSpec> testData() {
+        return Stream.of(
+                // The attribute names below are chosen such that their hash 
order differs from
+                // their declaration order. The inferred type must always 
follow the declaration
+                // order of the input type, because the runtime writes the 
updated values at the
+                // declared positions.
+                TestSpec.forStrategy(
+                                "Attribute order is preserved when the updated 
value changes the type",

Review Comment:
   Added nested object, array of objects, nested array, map with an object 
value, and variant cases. All eight specs fail without the fix.
   
   Adding them surfaced a second ordering issue in the same function: the 
validation error built its attribute list from a `HashMap`, so it reported the 
available attributes out of declaration order too. Fixed here with an ITCase 
case for it. The type strategy now iterates the declared attributes instead of 
depending on map order.



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