BUG #6421: Revoke column level privilage

The following bug has been logged on the website:

Bug reference: 6421
Logged by: Bartosz Dmytrak
Email address: bdmytrak(at)eranet(dot)pl
PostgreSQL version: 9.1.2
Operating system: Mandriva 2011 64 bit
Description:

Cannot revoke column level privilages.

Scenario:
1. as „postgres” user create a test table:
CREATE TABLE public."tblTest"
(
"RowId" serial NOT NULL,
"Column1" text,
"Column2" integer,
"Column3" integer,
CONSTRAINT "tblTest_pkey" PRIMARY KEY ("RowId")
)
WITH (
OIDS=FALSE
);

ALTER TABLE public."tblTest"
OWNER TO postgres;

GRANT ALL ON TABLE public."tblTest" TO postgres;

2. Grant privilages to different user, still using postgres acount:

GRANT UPDATE, INSERT, DELETE, REFERENCES, TRIGGER ON TABLE public."tblTest"
TO "otherUser";
GRANT SELECT ON TABLE public."tblTest" TO "otherUser" WITH GRANT OPTION;

3. Check privilages (assumption: there is the only one table named “tblTest”
in the database):

SELECT oid, relname, relacl FROM pg_class WHERE relname = 'tblTest';

oid | relname | relacl
-------+---------+--------------------------------------------------------
36385 | tblTest | {postgres=arwdDxt/postgres,otherUser=ar*wdxt/postgres}
(1 row)

and also for columns:

SELECT attrelid, attname, attacl FROM pg_attribute a
INNER JOIN pg_class c ON (a.attrelid = c.oid)
WHERE c.relname = 'tblTest';

attrelid | attname | attacl
----------+----------+--------
36385 | tableoid |
36385 | cmax |
36385 | xmax |
36385 | cmin |
36385 | xmin |
36385 | ctid |
36385 | RowId |
36385 | Column1 |
36385 | Column2 |
36385 | Column3 |
(10 rows)

Everything looks good.

4. login as “otherUser” and add column level privilages
myDatabase=> GRANT ALL("Column1") ON public."tblTest" TO public;
GRANT

5. Check privilages again (as postgres)
myDatabase=# SELECT oid, relname, relacl FROM pg_class
WHERE relname = 'tblTest';
oid | relname | relacl
-------+---------+--------------------------------------------------------
36385 | tblTest | {postgres=arwdDxt/postgres,otherUser=ar*wdxt/postgres}
(1 row)

myDatabase=# SELECT attrelid, attname, attacl FROM pg_attribute a
INNER JOIN pg_class c ON (a.attrelid = c.oid)
WHERE c.relname = 'tblTest';
attrelid | attname | attacl
----------+----------+----------------
36385 | tableoid |
36385 | cmax |
36385 | xmax |
36385 | cmin |
36385 | xmin |
36385 | ctid |
36385 | RowId |
36385 | Column1 | {=r/otherUser}
36385 | Column2 |
36385 | Column3 |
(10 rows)

Still looks good.

6. REVOKE Column level privilages from public on table using “postgres”
account:

myDatabase=# REVOKE ALL("Column1") ON public."tblTest" FROM public;
REVOKE

7. Check column privilages (as postgres):
myDatabase=# SELECT attrelid, attname, attacl FROM pg_attribute a
INNER JOIN pg_class c ON (a.attrelid = c.oid)
WHERE c.relname = 'tblTest';
attrelid | attname | attacl
----------+----------+----------------
36385 | tableoid |
36385 | cmax |
36385 | xmax |
36385 | cmin |
36385 | xmin |
36385 | ctid |
36385 | RowId |
36385 | Column1 | {=r/otherUser}
36385 | Column2 |
36385 | Column3 |
(10 rows)

or using \dp command:
myDatabase=# \dp public."tblTest"
Access privileges
Schema | Name | Type | Access privileges | Column access
privileges
--------+---------+-------+----------------------------+--------------------------
public | tblTest | table | postgres=arwdDxt/postgres +| Column1:
+
| | | otherUser=ar*wdxt/postgres | =r/otherUser
(1 row)

Looks like privilages has not been revoked.

regards,
Bartek