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sql-ref-syntax-ddl-alter-database.md

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ALTER DATABASE
ALTER DATABASE
Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to You 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.

Description

You can alter metadata associated with a database by setting DBPROPERTIES. The specified property values override any existing value with the same property name. Please note that the usage of SCHEMA and DATABASE are interchangeable and one can be used in place of the other. An error message is issued if the database is not found in the system. This command is mostly used to record the metadata for a database and may be used for auditing purposes.

Syntax

ALTER { DATABASE | SCHEMA } database_name
    SET DBPROPERTIES ( property_name = property_value [ , ... ] )

Parameters

  • database_name

    Specifies the name of the database to be altered.

Examples

-- Creates a database named `inventory`.
CREATE DATABASE inventory;

-- Alters the database to set properties `Edited-by` and `Edit-date`.
ALTER DATABASE inventory SET DBPROPERTIES ('Edited-by' = 'John', 'Edit-date' = '01/01/2001');

-- Verify that properties are set.
DESCRIBE DATABASE EXTENDED inventory;
+-------------------------+------------------------------------------+
|database_description_item|                database_description_value|
+-------------------------+------------------------------------------+
|            Database Name|                                 inventory|
|              Description|                                          |
|                 Location|   file:/temp/spark-warehouse/inventory.db|
|               Properties|((Edit-date,01/01/2001), (Edited-by,John))|
+-------------------------+------------------------------------------+

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