SHOW VIEWS

描述

SHOW VIEWS 语句返回指定数据库(可选)的所有视图。此外,可以使用可选的匹配模式过滤此语句的输出。如果未指定数据库,则从当前数据库返回视图。如果指定的数据库是全局临时视图数据库,我们将列出全局临时视图。请注意,无论给定哪个数据库,该命令也会列出本地临时视图。

语法

SHOW VIEWS [ { FROM | IN } database_name ] [ LIKE regex_pattern ]

参数

示例

-- Create views in different databases, also create global/local temp views.
CREATE VIEW sam AS SELECT id, salary FROM employee WHERE name = 'sam';
CREATE VIEW sam1 AS SELECT id, salary FROM employee WHERE name = 'sam1';
CREATE VIEW suj AS SELECT id, salary FROM employee WHERE name = 'suj';
USE userdb;
CREATE VIEW user1 AS SELECT id, salary FROM default.employee WHERE name = 'user1';
CREATE VIEW user2 AS SELECT id, salary FROM default.employee WHERE name = 'user2';
USE default;
CREATE GLOBAL TEMP VIEW temp1 AS SELECT 1 AS col1;
CREATE TEMP VIEW temp2 AS SELECT 1 AS col1;

-- List all views in default database
SHOW VIEWS;
+-------------+------------+--------------+
| namespace   | viewName   | isTemporary  |
+-------------+------------+--------------+
| default     | sam        | false        |
| default     | sam1       | false        |
| default     | suj        | false        |
|             | temp2      | true         |
+-------------+------------+--------------+

-- List all views from userdb database 
SHOW VIEWS FROM userdb;
+-------------+------------+--------------+
| namespace   | viewName   | isTemporary  |
+-------------+------------+--------------+
| userdb      | user1      | false        |
| userdb      | user2      | false        |
|             | temp2      | true         |
+-------------+------------+--------------+
  
-- List all views in global temp view database 
SHOW VIEWS IN global_temp;
+-------------+------------+--------------+
| namespace   | viewName   | isTemporary  |
+-------------+------------+--------------+
| global_temp | temp1      | true         |
|             | temp2      | true         |
+-------------+------------+--------------+

-- List all views from default database matching the pattern `sam*`
SHOW VIEWS FROM default LIKE 'sam*';
+-----------+------------+--------------+
| namespace | viewName   | isTemporary  |
+-----------+------------+--------------+
| default   | sam        | false        |
| default   | sam1       | false        |
+-----------+------------+--------------+

-- List all views from the current database matching the pattern `sam|suj|temp*`
SHOW VIEWS LIKE 'sam|suj|temp*';
+-------------+------------+--------------+
| namespace   | viewName   | isTemporary  |
+-------------+------------+--------------+
| default     | sam        | false        |
| default     | suj        | false        |
|             | temp2      | true         |
+-------------+------------+--------------+