[Fix](Nereids)fix be fold constant incorrectly on from_unixtime. (#18016)

fe/fe-core/src/main/java/org/apache/doris/nereids/rules/expression/rewrite/ExpressionNormalization.java

@@ -39,8 +39,10 @@ import java.util.List;
  * normalize expression of plan rule set.
  */
 public class ExpressionNormalization extends ExpressionRewrite {
-
+    // we should run supportJavaDateFormatter before foldConstantRule or be will fold
+    // from_unixtime(timestamp, 'yyyyMMdd') to 'yyyyMMdd'
     public static final List<ExpressionRewriteRule> NORMALIZE_REWRITE_RULES = ImmutableList.of(
+            SupportJavaDateFormatter.INSTANCE,
             NormalizeBinaryPredicatesRule.INSTANCE,
             BetweenToCompoundRule.INSTANCE,
             InPredicateToEqualToRule.INSTANCE,

regression-test/suites/nereids_syntax_p0/test_time_convert.groovy

@@ -0,0 +1,25 @@
+// 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.
+
+suite("test_time_convert_nereids") {
+    sql "set enable_nereids_planner=true"
+    sql "set enable_fold_constant_by_be=true"
+    test {
+        sql "select from_unixtime(1249488000, 'yyyyMMdd')"
+        result([['20090806']])
+    }
+}