75da05038b
### What changes were proposed in this pull request? Remove two leading spaces from sql tables. ### Why are the changes needed? Follow the format of other references such as https://docs.snowflake.com/en/sql-reference/constructs/join.html, https://docs.oracle.com/cd/B19306_01/server.102/b14200/statements_10002.htm, https://www.postgresql.org/docs/10/sql-select.html. ### Does this PR introduce any user-facing change? before ``` SELECT * FROM test; +-+ ... +-+ ``` after ``` SELECT * FROM test; +-+ ... +-+ ``` ### How was this patch tested? Manually build and check Closes #28348 from huaxingao/sql-format. Authored-by: Huaxin Gao <huaxing@us.ibm.com> Signed-off-by: gatorsmile <gatorsmile@gmail.com>
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| layout | title | displayTitle | license |
|---|---|---|---|
| global | CREATE DATABASE | CREATE 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
Creates a database with the specified name. If database with the same name already exists, an exception will be thrown.
Syntax
{% highlight sql %} CREATE { DATABASE | SCHEMA } [ IF NOT EXISTS ] database_name [ COMMENT database_comment ] [ LOCATION database_directory ] [ WITH DBPROPERTIES ( property_name = property_value [ , ... ] ) ] {% endhighlight %}
Parameters
database_name- Specifies the name of the database to be created.
<dt><code><em>IF NOT EXISTS</em></code></dt>
<dd>Creates a database with the given name if it doesn't exists. If a database with the same name already exists, nothing will happen.</dd>
<dt><code><em>database_directory</em></code></dt>
<dd>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.</dd>
<dt><code><em>database_comment</em></code></dt>
<dd>Specifies the description for the database.</dd>
<dt><code><em>WITH DBPROPERTIES ( property_name=property_value [ , ... ] )</em></code></dt>
<dd>Specifies the properties for the database in key-value pairs.</dd>
Examples
{% highlight sql %}
-- 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))| +-------------------------+--------------------------+ {% endhighlight %}