diff --git a/be/src/vec/functions/function_datetime_floor_ceil.cpp b/be/src/vec/functions/function_datetime_floor_ceil.cpp
index d8516763f5f592..a3f922894755b6 100644
--- a/be/src/vec/functions/function_datetime_floor_ceil.cpp
+++ b/be/src/vec/functions/function_datetime_floor_ceil.cpp
@@ -256,7 +256,7 @@ class FunctionDateTimeFloorCeil : public IFunction {
             }
         }
 
-        if (block.get_by_position(arguments[0]).type->is_nullable()) {
+        if (block.get_by_position(result).type->is_nullable()) {
             block.replace_by_position(
                     result,
                     ColumnNullable::create(std::move(col_to), std::move(result_null_map_column)));
diff --git a/be/src/vec/functions/function_other_types_to_date.cpp b/be/src/vec/functions/function_other_types_to_date.cpp
index 56b75d39cb88f2..2c35d4138bcaeb 100644
--- a/be/src/vec/functions/function_other_types_to_date.cpp
+++ b/be/src/vec/functions/function_other_types_to_date.cpp
@@ -534,7 +534,7 @@ class FromDays : public IFunction {
         }
 
         // Wrap result in nullable column only if input has nullable arguments
-        if (block.get_by_position(arguments[0]).type->is_nullable()) {
+        if (block.get_by_position(result).type->is_nullable()) {
             block.replace_by_position(result,
                                       ColumnNullable::create(std::move(res_column),
                                                              std::move(result_null_map_column)));
diff --git a/regression-test/suites/correctness_p0/test_time_round.groovy b/regression-test/suites/correctness_p0/test_time_round.groovy
index 45caf3a5c13e52..b747d894776f6b 100644
--- a/regression-test/suites/correctness_p0/test_time_round.groovy
+++ b/regression-test/suites/correctness_p0/test_time_round.groovy
@@ -396,6 +396,12 @@ suite("test_time_round") {
     testFoldConst("select minute_ceil('2025-09-10 12:34:56.45', 5)")
     testFoldConst("select minute_ceil('2025-09-10 12:34:56.12345', '2025-09-10 12:30:00.678')")
     testFoldConst("select minute_ceil('2025-09-10 12:34:56.9', 10, '2025-09-10 12:30:00.234567')")
+    testFoldConst("""select minute_ceil(CAST('2021-12-31 12:23:34' AS DATETIMEV2(0)),
+                        nullable(CAST('2021-12-31 12:23:34' AS DATETIMEV2(0))));""")
+    testFoldConst("""select minute_ceil(nullable(CAST('2021-12-31 12:23:34' AS DATETIMEV2(0))),
+                        CAST('2021-12-31 12:23:34' AS DATETIMEV2(0)));""")
+    testFoldConst("""select minute_ceil(nullable(CAST('2021-12-31 12:23:34' AS DATETIMEV2(0))),
+                        nullable(CAST('2021-12-31 12:23:34' AS DATETIMEV2(0))));""")
 
     testFoldConst("select minute_floor('2025-09-10 12:34:56')")
     testFoldConst("select minute_floor('2025-09-10 12:34:56', 5)")