| layout | title | displayTitle | license |
|---|---|---|---|
global |
USE Database |
USE 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.
|
USE statement is used to set the current database. After the current database is set,
the unqualified database artifacts such as tables, functions and views that are
referenced by SQLs are resolved from the current database.
The default database name is 'default'.
{% highlight sql %} USE database_name {% endhighlight %}
database_name- Name of the database will be used. If the database does not exist, an exception will be thrown.
{% highlight sql %} -- Use the 'userdb' which exists. USE userdb; +---------+--+ | Result | +---------+--+ +---------+--+
-- Use the 'userdb1' which doesn't exist USE userdb1; Error: org.apache.spark.sql.catalyst.analysis.NoSuchDatabaseException: Database 'userdb1' not found;(state=,code=0) {% endhighlight %}