Syntax
------

ALTER
  [ALGORITHM = {UNDEFINED | MERGE | TEMPTABLE}]
  [DEFINER = { user | CURRENT_USER }]
  [SQL SECURITY { DEFINER | INVOKER }]
  VIEW view_name [(column_list)]
  AS select_statement
  [WITH [CASCADED | LOCAL] CHECK OPTION]

Description
-----------

This statement changes the definition of a view, which must exist. The syntax
is similar to that for CREATE VIEW and the effect is the same as for CREATE OR
REPLACE VIEW if the view exists. This statement requires the CREATE VIEW and
DROP privileges for the view, and some privilege for each column referred to
in the SELECT statement. ALTER VIEW is allowed only to the definer or users
with the SUPER privilege.

Example
-------

ALTER VIEW v AS SELECT a, a*3 AS a2 FROM t;

URL: https://mariadb.com/kb/en/alter-view/