ALTER POLICY
ALTER POLICY
ALTER POLICY - change the definition of a row level security policy
Synopsis
ALTER POLICYnameONtable_nameRENAME TOnew_nameALTER POLICYnameONtable_name[ TO {role_name| PUBLIC | CURRENT_USER | SESSION_USER } [, ...] ] [ USING (using_expression) ] [ WITH CHECK (check_expression) ]
Description
ALTER POLICY
changes the definition of an existing
row-level security policy. Note that
ALTER POLICY
only allows the set of roles to which the policy applies and the
USING
and
WITH CHECK
expressions to
be modified. To change other properties of a policy, such as the command
to which it applies or whether it is permissive or restrictive, the policy
must be dropped and recreated.
To use
ALTER POLICY
, you must own the table that
the policy applies to.
In the second form of
ALTER POLICY
, the role list,
using_expression
, and
check_expression
are replaced
independently if specified. When one of those clauses is omitted, the
corresponding part of the policy is unchanged.
Parameters
-
name -
The name of an existing policy to alter.
-
table_name -
The name (optionally schema-qualified) of the table that the policy is on.
-
new_name -
The new name for the policy.
-
role_name -
The role(s) to which the policy applies. Multiple roles can be specified at one time. To apply the policy to all roles, use
PUBLIC. -
using_expression -
The
USINGexpression for the policy. See CREATE POLICY for details. -
check_expression -
The
WITH CHECKexpression for the policy. See CREATE POLICY for details.
Compatibility
ALTER POLICY
is a
PostgreSQL
extension.