ALTER 
ROLE(7)							   SQL Commands 						     ALTER ROLE(7)

NAME

       ALTER ROLE - change a database role

SYNOPSIS

       ALTER ROLE name [ [ WITH ] option [ ... ] ]

       where option can be:

	     SUPERUSER | NOSUPERUSER
	   | CREATEDB | NOCREATEDB
	   | CREATEROLE | NOCREATEROLE
	   | CREATEUSER | NOCREATEUSER
	   | INHERIT | NOINHERIT
	   | LOGIN | NOLOGIN
	   | CONNECTION LIMIT connlimit
	   | [ ENCRYPTED | UNENCRYPTED ] PASSWORD 'password'
	   | VALID UNTIL 'timestamp'

       ALTER ROLE name RENAME TO newname

       ALTER ROLE name SET configuration_parameter { TO | = } { value | DEFAULT }
       ALTER ROLE name SET configuration_parameter FROM CURRENT
       ALTER ROLE name RESET configuration_parameter
       ALTER ROLE name RESET ALL

DESCRIPTION

       ALTER ROLE changes the attributes of a PostgreSQL role.

       The  first variant of this command listed in the synopsis can change many of the role attributes that can be specified in CREATE ROLE [cre-
       ate_role(7)].  (All the possible attributes are covered, except that there are no options for adding or	removing  memberships;	use  GRANT
       [grant(7)]  and REVOKE [revoke(7)] for that.)  Attributes not mentioned in the command retain their previous settings.  Database superusers
       can change any of these settings for any role.  Roles having CREATEROLE privilege can change any of these settings, but only for  non-supe-
       ruser roles.  Ordinary roles can only change their own password.

       The  second  variant  changes the name of the role.  Database superusers can rename any role.  Roles having CREATEROLE privilege can rename
       non-superuser roles.  The current session user cannot be renamed.  (Connect as  a  different  user  if  you  need  to  do  that.)   Because
       MD5-encrypted passwords use the role name as cryptographic salt, renaming a role clears its password if the password is MD5-encrypted.

       The  remaining variants change a role's session default for a specified configuration variable. Whenever the role subsequently starts a new
       session, the specified value becomes the session default, overriding whatever setting is present in postgresql.conf or  has  been  received
       from  the postgres command line. This only happens at login time, so configuration settings associated with a role to which you've SET ROLE
       [set_role(7)] will be ignored.  Superusers can change anyone's session defaults. Roles having CREATEROLE privilege can change defaults  for
       non-superuser roles. Certain variables cannot be set this way, or can only be set if a superuser issues the command.

PARAMETERS

       name   The name of the role whose attributes are to be altered.

       SUPERUSER

       NOSUPERUSER

       CREATEDB

       NOCREATEDB

       CREATEROLE

       NOCREATEROLE

       CREATEUSER

       NOCREATEUSER

       INHERIT

       NOINHERIT

       LOGIN

       NOLOGIN

       CONNECTION LIMIT connlimit

       PASSWORD password

       ENCRYPTED

       UNENCRYPTED

       VALID UNTIL 'timestamp'
	      These  clauses  alter attributes originally set by CREATE ROLE [create_role(7)]. For more information, see the CREATE ROLE reference
	      page.

       newname
	      The new name of the role.

       configuration_parameter

       value  Set this role's session default for the specified configuration parameter to the given value. If value is DEFAULT or,  equivalently,
	      RESET  is  used, the role-specific variable setting is removed, so the role will inherit the system-wide default setting in new ses-
	      sions. Use RESET ALL to clear all role-specific settings.  SET FROM CURRENT saves the session's current value of	the  parameter	as
	      the role-specific value.

	      Role-specific variable setting take effect only at login; SET ROLE [set_role(7)] does not process role-specific variable settings.

	      See SET [set(7)] and in the documentation for more information about allowed parameter names and values.

NOTES

       Use CREATE ROLE [create_role(7)] to add new roles, and DROP ROLE [drop_role(7)] to remove a role.

       ALTER ROLE cannot change a role's memberships.  Use GRANT [grant(7)] and REVOKE [revoke(7)] to do that.

       Caution	must  be  exercised  when  specifying an unencrypted password with this command. The password will be transmitted to the server in
       cleartext, and it might also be logged in the client's command history or the server log. psql [psql(1)] contains a command password  that
       can be used to safely change a role's password.

       It  is  also possible to tie a session default to a specific database rather than to a role; see ALTER DATABASE [alter_database(7)].  Role-
       specific settings override database-specific ones if there is a conflict.

EXAMPLES

       Change a role's password:

       ALTER ROLE davide WITH PASSWORD 'hu8jmn3';

       Remove a role's password:

       ALTER ROLE davide WITH PASSWORD NULL;

       Change a password expiration date, specifying that the password should expire at midday on 4th May 2015 using the time zone  which  is  one
       hour ahead of UTC:

       ALTER ROLE chris VALID UNTIL 'May 4 12:00:00 2015 +1';

       Make a password valid forever:

       ALTER ROLE fred VALID UNTIL 'infinity';

       Give a role the ability to create other roles and new databases:

       ALTER ROLE miriam CREATEROLE CREATEDB;

       Give a role a non-default setting of the maintenance_work_mem parameter:

       ALTER ROLE worker_bee SET maintenance_work_mem = 100000;

COMPATIBILITY

       The ALTER ROLE statement is a PostgreSQL extension.

SEE ALSO

       CREATE ROLE [create_role(7)], DROP ROLE [drop_role(7)], SET [set(7)]

SQL - Language Statements					    2010-05-14							     ALTER ROLE(7)