diff --git a/src/common/meta/src/ddl/alter_database.rs b/src/common/meta/src/ddl/alter_database.rs
index 7d5f63b70919..1e9879662cd5 100644
--- a/src/common/meta/src/ddl/alter_database.rs
+++ b/src/common/meta/src/ddl/alter_database.rs
@@ -1,3 +1,17 @@
+// Copyright 2023 Greptime Team
+//
+// Licensed 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.
+
 use std::collections::HashMap;
 
 use api::v1::alter_database_expr::Kind;