revoke(5)
NAME
REVOKE - remove access privileges
SYNOPSIS
REVOKE [ GRANT OPTION FOR ]
{ { SELECT | INSERT | UPDATE | DELETE | REFERENCES | TRIGGER }
[,...] | ALL [ PRIVILEGES ] }
ON [ TABLE ] tablename [, ...]
FROM { username | GROUP groupname | PUBLIC } [, ...]
[ CASCADE | RESTRICT ]
REVOKE [ GRANT OPTION FOR ]
{ { USAGE | SELECT | UPDATE }
[,...] | ALL [ PRIVILEGES ] }
ON SEQUENCE sequencename [, ...]
FROM { username | GROUP groupname | PUBLIC } [, ...]
[ CASCADE | RESTRICT ]
REVOKE [ GRANT OPTION FOR ]
{ { CREATE | CONNECT | TEMPORARY | TEMP } [,...] | ALL [ PRIVILEGES ] }
ON DATABASE dbname [, ...]
FROM { username | GROUP groupname | PUBLIC } [, ...]
[ CASCADE | RESTRICT ]
REVOKE [ GRANT OPTION FOR ]
{ EXECUTE | ALL [ PRIVILEGES ] }
ON FUNCTION funcname ( [ [ argmode ] [ argname ] argtype [, ...] ] ) [, ...]
FROM { username | GROUP groupname | PUBLIC } [, ...]
[ CASCADE | RESTRICT ]
REVOKE [ GRANT OPTION FOR ]
{ USAGE | ALL [ PRIVILEGES ] }
ON LANGUAGE langname [, ...]
FROM { username | GROUP groupname | PUBLIC } [, ...]
[ CASCADE | RESTRICT ]
REVOKE [ GRANT OPTION FOR ]
{ { CREATE | USAGE } [,...] | ALL [ PRIVILEGES ] }
ON SCHEMA schemaname [, ...]
FROM { username | GROUP groupname | PUBLIC } [, ...]
[ CASCADE | RESTRICT ]
REVOKE [ GRANT OPTION FOR ]
{ CREATE | ALL [ PRIVILEGES ] }
ON TABLESPACE tablespacename [, ...]
FROM { username | GROUP groupname | PUBLIC } [, ...]
[ CASCADE | RESTRICT ]
REVOKE [ ADMIN OPTION FOR ]
role [, ...] FROM username [, ...]
[ CASCADE | RESTRICT ]
DESCRIPTION
The REVOKE command revokes previously granted privileges
from one or more roles. The key word PUBLIC refers to the
implicitly defined group of all roles.
See the description of the GRANT [grant(5)] command for
the meaning of the privilege types.
Note that any particular role will have the sum of privi-
leges granted directly to it, privileges granted to any
role it is presently a member of, and privileges granted
to PUBLIC. Thus, for example, revoking SELECT privilege
from PUBLIC does not necessarily mean that all roles have
lost SELECT privilege on the object: those who have it
granted directly or via another role will still have it.
If GRANT OPTION FOR is specified, only the grant option
for the privilege is revoked, not the privilege itself.
Otherwise, both the privilege and the grant option are
revoked.
If a user holds a privilege with grant option and has
granted it to other users then the privileges held by
those other users are called dependent privileges. If the
privilege or the grant option held by the first user is
being revoked and dependent privileges exist, those depen-
dent privileges are also revoked if CASCADE is specified,
else the revoke action will fail. This recursive revoca-
tion only affects privileges that were granted through a
chain of users that is traceable to the user that is the
subject of this REVOKE command. Thus, the affected users
may effectively keep the privilege if it was also granted
through other users.
When revoking membership in a role, GRANT OPTION is
instead called ADMIN OPTION, but the behavior is similar.
Note also that this form of the command does not allow the
noise word GROUP.
NOTES
Use psql(1)'s \z command to display the privileges granted
on existing objects. See GRANT [grant(5)] for information
about the format.
A user can only revoke privileges that were granted
directly by that user. If, for example, user A has granted
a privilege with grant option to user B, and user B has in
turned granted it to user C, then user A cannot revoke the
privilege directly from C. Instead, user A could revoke
the grant option from user B and use the CASCADE option so
that the privilege is in turn revoked from user C. For
another example, if both A and B have granted the same
privilege to C, A can revoke his own grant but not B's
grant, so C will still effectively have the privilege.
When a non-owner of an object attempts to REVOKE privi-
leges on the object, the command will fail outright if the
user has no privileges whatsoever on the object. As long
as some privilege is available, the command will proceed,
but it will revoke only those privileges for which the
user has grant options. The REVOKE ALL PRIVILEGES forms
will issue a warning message if no grant options are held,
while the other forms will issue a warning if grant
options for any of the privileges specifically named in
the command are not held. (In principle these statements
apply to the object owner as well, but since the owner is
always treated as holding all grant options, the cases can
never occur.)
If a superuser chooses to issue a GRANT or REVOKE command,
the command is performed as though it were issued by the
owner of the affected object. Since all privileges ulti-
mately come from the object owner (possibly indirectly via
chains of grant options), it is possible for a superuser
to revoke all privileges, but this may require use of CAS-
CADE as stated above.
REVOKE can also be done by a role that is not the owner of
the affected object, but is a member of the role that owns
the object, or is a member of a role that holds privileges
WITH GRANT OPTION on the object. In this case the command
is performed as though it were issued by the containing
role that actually owns the object or holds the privileges
WITH GRANT OPTION. For example, if table t1 is owned by
role g1, of which role u1 is a member, then u1 can revoke
privileges on t1 that are recorded as being granted by g1.
This would include grants made by u1 as well as by other
members of role g1.
If the role executing REVOKE holds privileges indirectly
via more than one role membership path, it is unspecified
which containing role will be used to perform the command.
In such cases it is best practice to use SET ROLE to
become the specific role you want to do the REVOKE as.
Failure to do so may lead to revoking privileges other
than the ones you intended, or not revoking anything at
all.
EXAMPLES
Revoke insert privilege for the public on table films:
REVOKE INSERT ON films FROM PUBLIC;
Revoke all privileges from user manuel on view kinds:
REVOKE ALL PRIVILEGES ON kinds FROM manuel;
Note that this actually means ``revoke all privileges that
I granted''.
Revoke membership in role admins from user joe:
REVOKE admins FROM joe;
COMPATIBILITY
The compatibility notes of the GRANT [grant(5)] command
apply analogously to REVOKE. The syntax summary is:
REVOKE [ GRANT OPTION FOR ] privileges
ON object [ ( column [, ...] ) ]
FROM { PUBLIC | username [, ...] }
{ RESTRICT | CASCADE }
One of RESTRICT or CASCADE is required according to the
standard, but PostgreSQL assumes RESTRICT by default.
SEE ALSO
GRANT [grant(5)]
SQL - Language Statements 2008-01-03 REVOKE()
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