[RFC] grants vs. inherited tables

Hello,

I tried to generalize a function that creates partitions
for a table and found out it's impossible to do it for grants.

Basically, what I want is a child table that takes it's grants
from parent table.  IMHO quite reasonable request.  But I don't
see a way to do it in pl/pgsql.  (Writing parser in plpgsql
for aclitemout() output does not count.)

The form for the create statement is:
 CREATE TABLE part (   [pre-9.0]    LIKE parent INCLUDING INDEXES INCLUDING CONSTRAINTS   [9.0+]       LIKE parent
INCLUDINGALL    -- skips grants ) INHERITS (parent);
 

Unless I'm missing something obvious, there is no way to take grants
from parent table.

My suggestions:

1) Have 'GRANTS' option for LIKE.  Seems obvious.

2) Include 'GRANTS' option in 'ALL'.  Also obvious.

3) Have a way to format aclitem into something  that can used to create GRANT statement easily.  Eg:
    pg_get_privilege_info(         IN priv aclitem,  OUT rolename text,  OUT privlist text[],  OUT
privlist_with_grant_optiontext[]);
 
  This allows doing complex introspection in pl/pgsql  and also helps tools that want to re-create table structure  in
otherdatabases.
 

Although 1)+2) and 3) seem like alternatives, I suggest doing all of them,
thus improving GRANT usage across the board.

Comments?

-- 
marko

NB: this mail is about designing and accepting TODO-items.
I might do them myself sometime, but I don't mind if anyone
implements them before me..