NAME

       ALTER_DEFAULT_PRIVILEGES - define default access privileges

SYNOPSIS

       ALTER DEFAULT PRIVILEGES
           [ FOR { ROLE | USER } target_role [, ...] ]
           [ IN SCHEMA schema_name [, ...] ]
           abbreviated_grant_or_revoke

       where abbreviated_grant_or_revoke is one of:

       GRANT { { SELECT | INSERT | UPDATE | DELETE | TRUNCATE | REFERENCES | TRIGGER }
           [, ...] | ALL [ PRIVILEGES ] }
           ON TABLES
           TO { [ GROUP ] role_name | PUBLIC } [, ...] [ WITH GRANT OPTION ]

       GRANT { { USAGE | SELECT | UPDATE }
           [, ...] | ALL [ PRIVILEGES ] }
           ON SEQUENCES
           TO { [ GROUP ] role_name | PUBLIC } [, ...] [ WITH GRANT OPTION ]

       GRANT { EXECUTE | ALL [ PRIVILEGES ] }
           ON FUNCTIONS
           TO { [ GROUP ] role_name | PUBLIC } [, ...] [ WITH GRANT OPTION ]

       GRANT { USAGE | ALL [ PRIVILEGES ] }
           ON TYPES
           TO { [ GROUP ] role_name | PUBLIC } [, ...] [ WITH GRANT OPTION ]

       REVOKE [ GRANT OPTION FOR ]
           { { SELECT | INSERT | UPDATE | DELETE | TRUNCATE | REFERENCES | TRIGGER }
           [, ...] | ALL [ PRIVILEGES ] }
           ON TABLES
           FROM { [ GROUP ] role_name | PUBLIC } [, ...]
           [ CASCADE | RESTRICT ]

       REVOKE [ GRANT OPTION FOR ]
           { { USAGE | SELECT | UPDATE }
           [, ...] | ALL [ PRIVILEGES ] }
           ON SEQUENCES
           FROM { [ GROUP ] role_name | PUBLIC } [, ...]
           [ CASCADE | RESTRICT ]

       REVOKE [ GRANT OPTION FOR ]
           { EXECUTE | ALL [ PRIVILEGES ] }
           ON FUNCTIONS
           FROM { [ GROUP ] role_name | PUBLIC } [, ...]
           [ CASCADE | RESTRICT ]

       REVOKE [ GRANT OPTION FOR ]
           { USAGE | ALL [ PRIVILEGES ] }
           ON TYPES
           FROM { [ GROUP ] role_name | PUBLIC } [, ...]
           [ CASCADE | RESTRICT ]

DESCRIPTION

       ALTER DEFAULT PRIVILEGES allows you to set the privileges that will be applied to objects
       created in the future. (It does not affect privileges assigned to already-existing
       objects.) Currently, only the privileges for tables (including views and foreign tables),
       sequences, functions, and types (including domains) can be altered.

       You can change default privileges only for objects that will be created by yourself or by
       roles that you are a member of. The privileges can be set globally (i.e., for all objects
       created in the current database), or just for objects created in specified schemas.

       As explained under GRANT(7), the default privileges for any object type normally grant all
       grantable permissions to the object owner, and may grant some privileges to PUBLIC as
       well. However, this behavior can be changed by altering the global default privileges with
       ALTER DEFAULT PRIVILEGES.

       Default privileges that are specified per-schema are added to whatever the global default
       privileges are for the particular object type. This means you cannot revoke privileges
       per-schema if they are granted globally (either by default, or according to a previous
       ALTER DEFAULT PRIVILEGES command that did not specify a schema). Per-schema REVOKE is only
       useful to reverse the effects of a previous per-schema GRANT.

   Parameters
       target_role
           The name of an existing role of which the current role is a member. If FOR ROLE is
           omitted, the current role is assumed.

       schema_name
           The name of an existing schema. If specified, the default privileges are altered for
           objects later created in that schema. If IN SCHEMA is omitted, the global default
           privileges are altered.

       role_name
           The name of an existing role to grant or revoke privileges for. This parameter, and
           all the other parameters in abbreviated_grant_or_revoke, act as described under
           GRANT(7) or REVOKE(7), except that one is setting permissions for a whole class of
           objects rather than specific named objects.

NOTES

       Use psql(1)'s \ddp command to obtain information about existing assignments of default
       privileges. The meaning of the privilege values is the same as explained for \dp under
       GRANT(7).

       If you wish to drop a role for which the default privileges have been altered, it is
       necessary to reverse the changes in its default privileges or use DROP OWNED BY to get rid
       of the default privileges entry for the role.

EXAMPLES

       Grant SELECT privilege to everyone for all tables (and views) you subsequently create in
       schema myschema, and allow role webuser to INSERT into them too:

           ALTER DEFAULT PRIVILEGES IN SCHEMA myschema GRANT SELECT ON TABLES TO PUBLIC;
           ALTER DEFAULT PRIVILEGES IN SCHEMA myschema GRANT INSERT ON TABLES TO webuser;

       Undo the above, so that subsequently-created tables won't have any more permissions than
       normal:

           ALTER DEFAULT PRIVILEGES IN SCHEMA myschema REVOKE SELECT ON TABLES FROM PUBLIC;
           ALTER DEFAULT PRIVILEGES IN SCHEMA myschema REVOKE INSERT ON TABLES FROM webuser;

       Remove the public EXECUTE permission that is normally granted on functions, for all
       functions subsequently created by role admin:

           ALTER DEFAULT PRIVILEGES FOR ROLE admin REVOKE EXECUTE ON FUNCTIONS FROM PUBLIC;

       Note however that you cannot accomplish that effect with a command limited to a single
       schema. This command has no effect, unless it is undoing a matching GRANT:

           ALTER DEFAULT PRIVILEGES IN SCHEMA public REVOKE EXECUTE ON FUNCTIONS FROM PUBLIC;

       That's because per-schema default privileges can only add privileges to the global
       setting, not remove privileges granted by it.

COMPATIBILITY

       There is no ALTER DEFAULT PRIVILEGES statement in the SQL standard.

SEE ALSO

       GRANT(7), REVOKE(7)