CREATE DATABASE
Description
Creates a database with the specified name. If database with the same name already exists, an exception will be thrown.
Syntax
CREATE { DATABASE | SCHEMA } [ IF NOT EXISTS ] database_name
[ COMMENT database_comment ]
[ LOCATION database_directory ]
[ WITH DBPROPERTIES ( property_name = property_value [ , ... ] ) ]
Parameters
-
database_name
Specifies the name of the database to be created.
-
IF NOT EXISTS
Creates a database with the given name if it does not exist. If a database with the same name already exists, nothing will happen.
-
database_directory
Path of the file system in which the specified database is to be created. If the specified path does not exist in the underlying file system, this command creates a directory with the path. If the location is not specified, the database will be created in the default warehouse directory, whose path is configured by the static configuration spark.sql.warehouse.dir.
-
database_comment
Specifies the description for the database.
-
WITH DBPROPERTIES ( property_name=property_value [ , … ] )
Specifies the properties for the database in key-value pairs.
Examples
-- Create database `customer_db`. This throws exception if database with name customer_db
-- already exists.
CREATE DATABASE customer_db;
-- Create database `customer_db` only if database with same name doesn't exist.
CREATE DATABASE IF NOT EXISTS customer_db;
-- Create database `customer_db` only if database with same name doesn't exist with
-- `Comments`,`Specific Location` and `Database properties`.
CREATE DATABASE IF NOT EXISTS customer_db COMMENT 'This is customer database' LOCATION '/user'
WITH DBPROPERTIES (ID=001, Name='John');
-- Verify that properties are set.
DESCRIBE DATABASE EXTENDED customer_db;
+-------------------------+--------------------------+
|database_description_item|database_description_value|
+-------------------------+--------------------------+
| Database Name| customer_db|
| Description| This is customer database|
| Location| hdfs://hacluster/user|
| Properties| ((ID,001), (Name,John))|
+-------------------------+--------------------------+