User/Group Quotas Revisited

I've sent this again as it hadn't appeared on the list in over 4 hours;
hopefully it isn't posted twice :).

Anyway, on to the main topic...

I've spent some time looking at my user/group quota patch and have
decided to start a new one for 8.x and need some decisions made:

- When to check quota (I'm leaning toward at commit)

- Is quota determined by the ACTUAL sizes of user-owned objects.

- Quota creation syntax
CREATE USER foo QUOTA 10M ON bar;
ALTER USER foo QUOTA 1G ON bar;
CREATE GROUP group QUOTA 100M ON sometbspc;
...

- Quota removal syntax
ALTER USER foo NOQUOTA ON bar;
OR
ALTER USER foo QUOTA UNLIMITED ON bar;

- Size parameter - Currently the following is allowed (I removed
kilobytes):
file_size {digit}+[m|M|g|G|t|T]

- Who has permissions to set the user's quota per tablespace, the
superuser and the tablespace owner?

- How do we want to store quotas in the catalog? I can go with an
aclitem-like array approach at the tablespace level or create a
pg_quota relation (aclitem-like array approach seems nicer, but you may
know something I don't)

Anything else you can think of, let me know.

Thanks.

--
Jonah H. Harris, Sr. Web Administrator | phone: 505.224.4814
Albuquerque TVI | fax: 505.224.3014
525 Buena Vista SE | jharris(at)tvi(dot)edu
Albuquerque, New Mexico 87106 | http://w3.tvi.edu/~jharris/

A hacker on a roll may be able to produce, in a period of a few
months, something that a small development group (say, 7-8 people)
would have a hard time getting together over a year. IBM used to
report that certain programmers might be as much as 100 times as
productive as other workers, or more.

-- Peter Seebach