SHOW VIEWS (SQL Analytics)SHOW VIEWS (SQL Analytics)

返回可选指定数据库的所有视图。Returns all the views for an optionally specified database. 此外,此语句的输出可以通过可选的匹配模式进行筛选。Additionally, the output of this statement may be filtered by an optional matching pattern. 如果未指定数据库,则从当前数据库返回视图。If no database is specified then the views are returned from the current database. 如果指定的数据库是全局临时视图数据库,将列出全局临时视图。If the specified database is global temporary view database, we will list global temporary views. 请注意,该命令还会列出本地临时视图,而不考虑给定的数据库。Note that the command also lists local temporary views regardless of a given database.

语法Syntax

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

参数Parameters

  • { FROM | IN } database_name{ FROM | IN } database_name

    从中列出视图的数据库名称。The database name from which views are listed.

  • regex_patternregex_pattern

    用于筛选掉不需要的视图的正则表达式模式。The regular expression pattern that is used to filter out unwanted views.

    • *| 字符外,该模式的工作方式类似于正则表达式。Except for * and | character, the pattern works like a regular expression.
    • 只有 * 则匹配 0 个或多个字符,| 用于分隔多个不同的正则表达式,其中任何一个表达式都可以匹配。* alone matches 0 or more characters and | is used to separate multiple different regular expressions, any of which can match.
    • 在处理前,在输入模式中删除前导空格和尾随空格。The leading and trailing blanks are trimmed in the input pattern before processing. 模式匹配不区分大小写。The pattern match is case-insensitive.

示例Examples

-- 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         |
+-------------+------------+--------------+