# ALTER_VIEW - change the definition of a view - man(7) - [phpMan]

_ALTER_ [_VIEW_(7)](https://www.chedong.com/phpMan.php/man/VIEW/7/markdown)                      PostgreSQL 16.14 Documentation                      _ALTER_ [_VIEW_(7)](https://www.chedong.com/phpMan.php/man/VIEW/7/markdown)

## NAME
       ALTER_VIEW - change the definition of a view

## SYNOPSIS
       ALTER VIEW [ IF EXISTS ] _name_ ALTER [ COLUMN ] _column_name_ SET DEFAULT _expression_
       ALTER VIEW [ IF EXISTS ] _name_ ALTER [ COLUMN ] _column_name_ DROP DEFAULT
       ALTER VIEW [ IF EXISTS ] _name_ OWNER TO { _new_owner_ | CURRENT_ROLE | CURRENT_USER | SESSION_USER }
       ALTER VIEW [ IF EXISTS ] _name_ RENAME [ COLUMN ] _column_name_ TO _new_column_name_
       ALTER VIEW [ IF EXISTS ] _name_ RENAME TO _new_name_
       ALTER VIEW [ IF EXISTS ] _name_ SET SCHEMA _new_schema_
       ALTER VIEW [ IF EXISTS ] _name_ SET ( _view_option_name_ [= _view_option_value_] [, ... ] )
       ALTER VIEW [ IF EXISTS ] _name_ RESET ( _view_option_name_ [, ... ] )

## DESCRIPTION
       **ALTER VIEW **changes various auxiliary properties of a view. (If you want to modify the view's
       defining query, use **CREATE OR REPLACE VIEW**.)

       You must own the view to use **ALTER VIEW**. To change a view's schema, you must also have CREATE
       privilege on the new schema. To alter the owner, you must be able to SET ROLE to the new
       owning role, and that role must have CREATE privilege on the view's schema. (These
       restrictions enforce that altering the owner doesn't do anything you couldn't do by dropping
       and recreating the view. However, a superuser can alter ownership of any view anyway.)

## PARAMETERS
       _name_
           The name (optionally schema-qualified) of an existing view.

       _column_name_
           Name of an existing column.

       _new_column_name_
           New name for an existing column.

       IF EXISTS
           Do not throw an error if the view does not exist. A notice is issued in this case.

       SET/DROP DEFAULT
           These forms set or remove the default value for a column. A view column's default value
           is substituted into any **INSERT **or **UPDATE **command whose target is the view, before
           applying any rules or triggers for the view. The view's default will therefore take
           precedence over any default values from underlying relations.

       _new_owner_
           The user name of the new owner of the view.

       _new_name_
           The new name for the view.

       _new_schema_
           The new schema for the view.

       SET ( _view_option_name_ [= _view_option_value_] [, ... ] )
       RESET ( _view_option_name_ [, ... ] )
           Sets or resets a view option. Currently supported options are:

           check_option (enum)
               Changes the check option of the view. The value must be local or cascaded.

           security_barrier (boolean)
               Changes the security-barrier property of the view. The value must be a Boolean value,
               such as true or false.

           security_invoker (boolean)
               Changes the security-invoker property of the view. The value must be a Boolean value,
               such as true or false.

## NOTES
       For historical reasons, **ALTER TABLE **can be used with views too; but the only variants of
       **ALTER TABLE **that are allowed with views are equivalent to the ones shown above.

## EXAMPLES
       To rename the view foo to bar:

           ALTER VIEW foo RENAME TO bar;

       To attach a default column value to an updatable view:

           CREATE TABLE base_table (id int, ts timestamptz);
           CREATE VIEW a_view AS SELECT * FROM base_table;
           ALTER VIEW a_view ALTER COLUMN ts SET DEFAULT now();
           INSERT INTO base_table(id) [VALUES(1)](https://www.chedong.com/phpMan.php/man/VALUES/1/markdown);  -- ts will receive a NULL
           INSERT INTO a_view(id) [VALUES(2)](https://www.chedong.com/phpMan.php/man/VALUES/2/markdown);  -- ts will receive the current time

## COMPATIBILITY
       **ALTER VIEW **is a PostgreSQL extension of the SQL standard.

## SEE ALSO
       CREATE VIEW ([**CREATE_VIEW**(7)](https://www.chedong.com/phpMan.php/man/CREATEVIEW/7/markdown)), DROP VIEW ([**DROP_VIEW**(7)](https://www.chedong.com/phpMan.php/man/DROPVIEW/7/markdown))

PostgreSQL 16.14                                2026                                   _ALTER_ [_VIEW_(7)](https://www.chedong.com/phpMan.php/man/VIEW/7/markdown)