diff --git a/fe/fe-core/src/main/java/org/apache/doris/nereids/rules/rewrite/AdjustNullable.java b/fe/fe-core/src/main/java/org/apache/doris/nereids/rules/rewrite/AdjustNullable.java
index 44b88c54e8..8249202dbd 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/nereids/rules/rewrite/AdjustNullable.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/nereids/rules/rewrite/AdjustNullable.java
@@ -168,7 +168,7 @@ public class AdjustNullable extends DefaultPlanRewriter<Map<ExprId, Slot>> imple
         ImmutableList.Builder<List<SlotReference>> newChildrenOutputs = ImmutableList.builder();
         List<Boolean> inputNullable = null;
         if (!setOperation.children().isEmpty()) {
-            inputNullable = setOperation.child(0).getOutput().stream()
+            inputNullable = setOperation.getRegularChildOutput(0).stream()
                     .map(ExpressionTrait::nullable).collect(Collectors.toList());
             for (int i = 0; i < setOperation.arity(); i++) {
                 List<Slot> childOutput = setOperation.child(i).getOutput();
diff --git a/regression-test/suites/nereids_rules_p0/adjust_nullable/set_operation.groovy b/regression-test/suites/nereids_rules_p0/adjust_nullable/set_operation.groovy
new file mode 100644
index 0000000000..4e0c4089d8
--- /dev/null
+++ b/regression-test/suites/nereids_rules_p0/adjust_nullable/set_operation.groovy
@@ -0,0 +1,46 @@
+// 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_set_operation_adjust_nullable") {
+
+    sql """
+        DROP TABLE IF EXISTS t1
+    """
+    sql """
+        DROP TABLE IF EXISTS t2
+    """
+
+    sql """
+        CREATE TABLE t1(c1 varchar) DISTRIBUTED BY hash(c1) PROPERTIES ("replication_num" = "1");
+    """
+
+    sql """
+        CREATE TABLE t2(c2 date) DISTRIBUTED BY hash(c2) PROPERTIES ("replication_num" = "1");
+    """
+
+    sql """
+        insert into t1 values('+06-00');
+    """
+
+    sql """
+        insert into t2 values('1990-11-11');
+    """
+
+    sql """
+        SELECT c1, c1 FROM t1 MINUS SELECT c2, c2 FROM t2;
+    """
+}