diff --git a/be/src/vec/functions/function_jsonb.cpp b/be/src/vec/functions/function_jsonb.cpp
index a33cad13623beea..97a8db84b1fc3d0 100644
--- a/be/src/vec/functions/function_jsonb.cpp
+++ b/be/src/vec/functions/function_jsonb.cpp
@@ -1159,7 +1159,7 @@ class FunctionJsonbContains : public IFunction {
     static FunctionPtr create() { return std::make_shared<FunctionJsonbContains<Impl>>(); }
 
     DataTypePtr get_return_type_impl(const DataTypes& arguments) const override {
-        return make_nullable(std::make_shared<DataTypeUInt8>());
+        return std::make_shared<DataTypeUInt8>();
     }
     DataTypes get_variadic_argument_types_impl() const override {
         return Impl::get_variadic_argument_types();
@@ -1168,8 +1168,6 @@ class FunctionJsonbContains : public IFunction {
         return get_variadic_argument_types_impl().size();
     }
 
-    bool use_default_implementation_for_nulls() const override { return false; }
-
     Status execute_impl(FunctionContext* context, Block& block, const ColumnNumbers& arguments,
                         size_t result, size_t input_rows_count) const override {
         return Impl::execute_impl(context, block, arguments, result, input_rows_count);
@@ -1245,8 +1243,7 @@ struct JsonbContainsUtil {
             res->insert_data(const_cast<const char*>((char*)&contains_value), 0);
         }
 
-        block.replace_by_position(result,
-                                  ColumnNullable::create(std::move(res), std::move(null_map)));
+        block.replace_by_position(result, std::move(res));
         return Status::OK();
     }
 };
@@ -1296,13 +1293,11 @@ class FunctionJsonbDepth : public IFunction {
     static FunctionPtr create() { return std::make_shared<FunctionJsonbDepth>(); }
 
     DataTypePtr get_return_type_impl(const DataTypes& arguments) const override {
-        return make_nullable(std::make_shared<DataTypeInt32>());
+        return std::make_shared<DataTypeInt32>();
     }
 
     size_t get_number_of_arguments() const override { return 1; }
 
-    bool use_default_implementation_for_nulls() const override { return false; }
-
     Status execute_impl(FunctionContext* context, Block& block, const ColumnNumbers& arguments,
                         size_t result, size_t input_rows_count) const override {
         DCHECK_GE(arguments.size(), 1);
@@ -1333,8 +1328,7 @@ class FunctionJsonbDepth : public IFunction {
             res_data[i] = value->depth();
         }
 
-        block.replace_by_position(
-                result, ColumnNullable::create(std::move(col_result), std::move(null_map)));
+        block.replace_by_position(result, std::move(col_result));
         return Status::OK();
     }
 };