ALTER VIEW(7) PostgreSQL 10.1 Documentation ALTER VIEW(7)NAMEALTER_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_USER | SESSION_USER }
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 also be a direct or indirect member of 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.
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 (string)
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 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); -- ts will receive a NULL
INSERT INTO a_view(id)VALUES(2); -- ts will receive the current time
COMPATIBILITY
ALTER VIEW is a PostgreSQL extension of the SQL standard.
SEE ALSO
CREATE VIEW (CREATE_VIEW(7)), DROP VIEW (DROP_VIEW(7))
PostgreSQL 10.1 2017 ALTER VIEW(7)
