diff --git a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/DayCeil.java b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/DayCeil.java
index e0eeece6b300c06..740363b50aad2b8 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/DayCeil.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/DayCeil.java
@@ -118,8 +118,7 @@ public Expression withConstantArgs(Expression literal) {
             case 3:
                 return new DayCeil(literal, child(1), child(2));
             default:
-                // should not reach
-                return null;
+                throw new IllegalStateException("The function " + getName() + " has invalid child number.");
         }
     }
 }
diff --git a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/DayFloor.java b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/DayFloor.java
index 804658ce984fa95..5ba7fc13c7526b8 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/DayFloor.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/DayFloor.java
@@ -118,8 +118,7 @@ public Expression withConstantArgs(Expression literal) {
             case 3:
                 return new DayFloor(literal, child(1), child(2));
             default:
-                // should not reach
-                return null;
+                throw new IllegalStateException("The function " + getName() + " has invalid child number.");
         }
     }
 }
diff --git a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/HourCeil.java b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/HourCeil.java
index 4c8a98ca9fd025c..13358e18d747705 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/HourCeil.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/HourCeil.java
@@ -112,8 +112,7 @@ public Expression withConstantArgs(Expression literal) {
             case 3:
                 return new HourCeil(literal, child(1), child(2));
             default:
-                // should not reach
-                return null;
+                throw new IllegalStateException("The function " + getName() + " has invalid child number.");
         }
     }
 }
diff --git a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/HourFloor.java b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/HourFloor.java
index 1148c3191612f0f..f48e26ea443f251 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/HourFloor.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/HourFloor.java
@@ -112,8 +112,7 @@ public Expression withConstantArgs(Expression literal) {
             case 3:
                 return new HourFloor(literal, child(1), child(2));
             default:
-                // should not reach
-                return null;
+                throw new IllegalStateException("The function " + getName() + " has invalid child number.");
         }
     }
 }
diff --git a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/MinuteCeil.java b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/MinuteCeil.java
index 55e34cd14355658..4f3e317d00ef39c 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/MinuteCeil.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/MinuteCeil.java
@@ -111,8 +111,7 @@ public Expression withConstantArgs(Expression literal) {
             case 3:
                 return new MinuteCeil(literal, child(1), child(2));
             default:
-                // should not reach
-                return null;
+                throw new IllegalStateException("The function " + getName() + " has invalid child number.");
         }
     }
 }
diff --git a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/MinuteFloor.java b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/MinuteFloor.java
index 7aab30162aa14fc..cefb5222c764ad5 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/MinuteFloor.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/MinuteFloor.java
@@ -111,8 +111,7 @@ public Expression withConstantArgs(Expression literal) {
             case 3:
                 return new MinuteFloor(literal, child(1), child(2));
             default:
-                // should not reach
-                return null;
+                throw new IllegalStateException("The function " + getName() + " has invalid child number.");
         }
     }
 }
diff --git a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/MonthCeil.java b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/MonthCeil.java
index 7d3514610d49ea7..a1f4628dd6a9abc 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/MonthCeil.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/MonthCeil.java
@@ -118,8 +118,7 @@ public Expression withConstantArgs(Expression literal) {
             case 3:
                 return new MonthCeil(literal, child(1), child(2));
             default:
-                // should not reach
-                return null;
+                throw new IllegalStateException("The function " + getName() + " has invalid child number.");
         }
     }
 }
diff --git a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/MonthFloor.java b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/MonthFloor.java
index f2535a674ddc94f..d55d52ab68ce5a9 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/MonthFloor.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/MonthFloor.java
@@ -118,8 +118,7 @@ public Expression withConstantArgs(Expression literal) {
             case 3:
                 return new MonthFloor(literal, child(1), child(2));
             default:
-                // should not reach
-                return null;
+                throw new IllegalStateException("The function " + getName() + " has invalid child number.");
         }
     }
 }
diff --git a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/SecondCeil.java b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/SecondCeil.java
index b530cff9bfc8c94..3b0e657698743aa 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/SecondCeil.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/SecondCeil.java
@@ -112,8 +112,7 @@ public Expression withConstantArgs(Expression literal) {
             case 3:
                 return new SecondCeil(literal, child(1), child(2));
             default:
-                // should not reach
-                return null;
+                throw new IllegalStateException("The function " + getName() + " has invalid child number.");
         }
     }
 }
diff --git a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/SecondFloor.java b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/SecondFloor.java
index 806aad402220a5d..c06fff06aed0162 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/SecondFloor.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/SecondFloor.java
@@ -113,8 +113,7 @@ public Expression withConstantArgs(Expression literal) {
             case 3:
                 return new SecondFloor(literal, child(1), child(2));
             default:
-                // should not reach
-                return null;
+                throw new IllegalStateException("The function " + getName() + " has invalid child number.");
         }
     }
 }
diff --git a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/YearCeil.java b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/YearCeil.java
index 19a7626d5721d1a..37c952af815d861 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/YearCeil.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/YearCeil.java
@@ -117,8 +117,7 @@ public Expression withConstantArgs(Expression literal) {
             case 3:
                 return new YearCeil(literal, child(1), child(2));
             default:
-                // should not reach
-                return null;
+                throw new IllegalStateException("The function " + getName() + " has invalid child number.");
         }
     }
 }
diff --git a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/YearFloor.java b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/YearFloor.java
index 06f7894768ae786..00a1ad918f7ffa7 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/YearFloor.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/YearFloor.java
@@ -117,8 +117,7 @@ public Expression withConstantArgs(Expression literal) {
             case 3:
                 return new YearFloor(literal, child(1), child(2));
             default:
-                // should not reach
-                return null;
+                throw new IllegalStateException("The function " + getName() + " has invalid child number.");
         }
     }
 }
diff --git a/regression-test/suites/nereids_rules_p0/partition_prune/test_add_sub_diff_ceil_floor.groovy b/regression-test/suites/nereids_rules_p0/partition_prune/test_add_sub_diff_ceil_floor.groovy
index 12ddff6eb0ec8b2..8582dad9ec7b27c 100644
--- a/regression-test/suites/nereids_rules_p0/partition_prune/test_add_sub_diff_ceil_floor.groovy
+++ b/regression-test/suites/nereids_rules_p0/partition_prune/test_add_sub_diff_ceil_floor.groovy
@@ -272,7 +272,7 @@ suite("test_add_sub_diff_ceil_floor") {
     }
     explain  {
         sql "select * from test_add_sub_diff_ceil_floor_t where years_diff('2021-01-01',month_ceil(hours_sub(dt, 1))) <=2"
-        contains("partitions=3/5 (p3,p4,p5)")
+        contains("partitions=4/5 (p1,p3,p4,p5)")
     }
     // mixed with non-function predicates
     explain {
@@ -293,4 +293,21 @@ suite("test_add_sub_diff_ceil_floor") {
         sql """select * from test_add_sub_diff_ceil_floor_t where hours_add(dt, years_diff(dt,'2018-01-01')) <'2018-01-01' """
         contains("partitions=5/5 (p1,p2,p3,p4,p5)")
     }
+
+    // max
+    sql "drop table if exists max_t"
+    sql """create table max_t (a int, dt datetime, d date, c varchar(100)) duplicate key(a)
+    partition by range(dt) (
+            partition p1 values less than ("2017-01-01"),
+            partition p2 values less than ("2018-01-01"),
+            partition p3 values less than ("2019-01-01"),
+            partition p4 values less than ("2020-01-01"),
+            partition p5 values less than ("2021-01-01"),
+            partition p6 values less than MAX
+    ) distributed by hash(a) properties("replication_num"="1");"""
+    sql """INSERT INTO max_t SELECT number,
+    date_add('2016-01-01 00:00:00', interval number month),
+    cast(date_add('2022-01-01 00:00:00', interval number month) as date), cast(number as varchar(65533)) FROM numbers('number'='100');"""
+    sql "INSERT INTO max_t  values(3,null,null,null);"
+
 }
\ No newline at end of file