Btw., it would be really nice if some limited form of this could get done, so I could finish the information schema views pertaining to group privileges. I'd just need a way to find out what users are in what groups. If unnest() would work for locally constant arguments, I think it could be done like
SELECT g.groname FROM pg_user u, pg_group g WHERE u.usesysid IN (SELECT * FROM UNNEST((SELECT grolist FROM pg_group WHERE grosysid = g.grosysid))) AND u.usename = current_user;
Or is there some other way to do this now?
It isn't in CVS yet, but hopefully before Monday evening you'll be able to do this:
regression=# create user u1;
CREATE USER
regression=# create user u2;
CREATE USER
regression=# create user u3;
CREATE USER
regression=# create group g1 with user u1,u2;
CREATE GROUP
regression=# create group g2 with user u1,u2,u3;
CREATE GROUP
regression=# \c - u1
You are now connected as new user u1.
regression=> SELECT g.groname FROM pg_group g, pg_user u WHERE u.usename = current_user AND u.usesysid = ANY (g.grolist);
groname
---------
g1
g2
(2 rows)
Joe
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