Rechercher dans le manuel MySQL

13.7.6.13 SHOW CREATE VIEW Syntax

Contents
  1. SHOW CREATE VIEW view_name

This statement shows the CREATE VIEW statement that creates the named view.

  1. mysql> SHOW CREATE VIEW v\G
  2. *************************** 1. row ***************************
  3.                 View: v
  4.          Create View: CREATE ALGORITHM=UNDEFINED
  5.                       DEFINER=`bob`@`localhost`
  6.                       SQL SECURITY DEFINER VIEW
  7.                       `v` AS select 1 AS `a`,2 AS `b`
  8. character_set_client: utf8mb4
  9. collation_connection: utf8mb4_0900_ai_ci

character_set_client is the session value of the character_set_client system variable when the view was created. collation_connection is the session value of the collation_connection system variable when the view was created.

Use of SHOW CREATE VIEW requires the SHOW VIEW privilege, and the SELECT privilege for the view in question.

View information is also available from the INFORMATION_SCHEMA VIEWS table. See Section 25.36, “The INFORMATION_SCHEMA VIEWS Table”.

MySQL lets you use different sql_mode settings to tell the server the type of SQL syntax to support. For example, you might use the ANSI SQL mode to ensure MySQL correctly interprets the standard SQL concatenation operator, the double bar (||), in your queries. If you then create a view that concatenates items, you might worry that changing the sql_mode setting to a value different from ANSI could cause the view to become invalid. But this is not the case. No matter how you write out a view definition, MySQL always stores it the same way, in a canonical form. Here is an example that shows how the server changes a double bar concatenation operator to a CONCAT() function:

  1. mysql> SET sql_mode = 'ANSI';
  2. Query OK, 0 rows affected (0.00 sec)
  3.  
  4. mysql> CREATE VIEW test.v AS SELECT 'a' || 'b' as col1;
  5. Query OK, 0 rows affected (0.01 sec)
  6.  
  7. mysql> SHOW CREATE VIEW test.v\G
  8. *************************** 1. row ***************************
  9.                 View: v
  10.          Create View: CREATE VIEW "v" AS select concat('a','b') AS "col1"
  11. ...
  12. 1 row in set (0.00 sec)

The advantage of storing a view definition in canonical form is that changes made later to the value of sql_mode will not affect the results from the view. However an additional consequence is that comments prior to SELECT are stripped from the definition by the server.


Find a PHP function

Document created the 26/06/2006, last modified the 26/10/2018
Source of the printed document:https://www.gaudry.be/en/mysql-rf-show-create-view.html

The infobrol is a personal site whose content is my sole responsibility. The text is available under CreativeCommons license (BY-NC-SA). More info on the terms of use and the author.

References

  1. View the html document Language of the document:en Manuel MySQL : https://dev.mysql.com/

These references and links indicate documents consulted during the writing of this page, or which may provide additional information, but the authors of these sources can not be held responsible for the content of this page.
The author This site is solely responsible for the way in which the various concepts, and the freedoms that are taken with the reference works, are presented here. Remember that you must cross multiple source information to reduce the risk of errors.

Contents Haut