diff --git a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/Nvl.java b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/Nvl.java
index 945feec9d2..9b8e51d238 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/Nvl.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/Nvl.java
@@ -62,8 +62,6 @@ public class Nvl extends ScalarFunction
             FunctionSignature.ret(FloatType.INSTANCE).args(FloatType.INSTANCE, FloatType.INSTANCE),
             FunctionSignature.ret(DateType.INSTANCE).args(DateType.INSTANCE, DateType.INSTANCE),
             FunctionSignature.ret(DateTimeType.INSTANCE).args(DateTimeType.INSTANCE, DateTimeType.INSTANCE),
-            FunctionSignature.ret(DateTimeType.INSTANCE).args(DateType.INSTANCE, DateTimeType.INSTANCE),
-            FunctionSignature.ret(DateTimeType.INSTANCE).args(DateTimeType.INSTANCE, DateType.INSTANCE),
             FunctionSignature.ret(DateTimeV2Type.SYSTEM_DEFAULT)
                     .args(DateTimeV2Type.SYSTEM_DEFAULT, DateTimeV2Type.SYSTEM_DEFAULT),
             FunctionSignature.ret(DateV2Type.INSTANCE)
diff --git a/fe/fe-core/src/main/java/org/apache/doris/nereids/types/DateTimeV2Type.java b/fe/fe-core/src/main/java/org/apache/doris/nereids/types/DateTimeV2Type.java
index 0aadd376df..f312d6bc7c 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/nereids/types/DateTimeV2Type.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/nereids/types/DateTimeV2Type.java
@@ -72,7 +72,8 @@ public class DateTimeV2Type extends DateLikeType {
         if (dataType instanceof DateTimeV2Type) {
             return (DateTimeV2Type) dataType;
         }
-        if (dataType instanceof IntegralType || dataType instanceof BooleanType || dataType instanceof NullType) {
+        if (dataType instanceof IntegralType || dataType instanceof BooleanType
+                || dataType instanceof NullType || dataType instanceof DateTimeType) {
             return SYSTEM_DEFAULT;
         }
         return MAX;