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ALTER VIEW(7) PostgreSQL 12.3 Documentation ALTER VIEW(7)
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_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 12.3 2020 ALTER VIEW(7)
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