RFC: create/alter user extension

Is everyone okay with the following syntax:

CREATE USER username
[ WITH ID digits ]
^^^^^^^^^^^^^^^^^^
[ WITH PASSWORD password ]
[ CREATEDB   | NOCREATEDB ]
[ CREATEUSER | NOCREATEUSER ]
[ IN GROUP     groupname [, ...] ]
[ VALID UNTIL  'abstime' ]

ALTER USER username
[ WITH ID digits ]
^^^^^^^^^^^^^^^^^^
[ WITH PASSWORD password ]
[ CREATEDB | NOCREATEDB ]
[ CREATEUSER | NOCREATEUSER ]
[ IN GROUP groupname [, ...] ]
[ VALID UNTIL 'abstime' ]

The catch is that ID would have to be a new keyword and we'd have to live
with that for a long time. Other choices include:
* UID
* SYSID
* USESYSID
etc.

What do the standards and pseudo-standards say?

I think I'll take a stab at this and settle the createuser script issue
the proper way.
-Peter

-- 
Peter Eisentraut                  Sernanders vaeg 10:115
peter_e@gmx.net                   75262 Uppsala
http://yi.org/peter-e/            Sweden