### 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 | SHOW DATABASES | SHOW DATABASES | 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
Lists the databases that match an optionally supplied string pattern. If no
pattern is supplied then the command lists all the databases in the system.
Please note that the usage of SCHEMAS
and DATABASES
are interchangeable
and mean the same thing.
Syntax
{% highlight sql %} SHOW { DATABASES | SCHEMAS } [ LIKE regex_pattern ] {% endhighlight %}
Parameters
regex_pattern
-
Specifies a regular expression pattern that is used to filter the results of the
statement.
- Only
*
and|
are allowed as wildcard pattern. - Excluding
*
and|
, the remaining pattern follows the regular expression semantics. - The leading and trailing blanks are trimmed in the input pattern before processing. The pattern match is case-insensitive.
- Only
Examples
{% highlight sql %}
-- Create database. Assumes a database named default
already exists in
-- the system.
CREATE DATABASE payroll_db;
CREATE DATABASE payments_db;
-- Lists all the databases. SHOW DATABASES; +------------+ |databaseName| +------------+ | default| | payments_db| | payroll_db| +------------+
-- Lists databases with name starting with string pattern pay
SHOW DATABASES LIKE 'pay*';
+------------+
|databaseName|
+------------+
| payments_db|
| payroll_db|
+------------+
-- Lists all databases. Keywords SCHEMAS and DATABASES are interchangeable. SHOW SCHEMAS; +------------+ |databaseName| +------------+ | default| | payments_db| | payroll_db| +------------+ {% endhighlight %}