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rowsecurity.out
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--
-- Test of Row-level security feature
--
-- Clean up in case a prior regression run failed
-- Suppress NOTICE messages when users/groups don't exist
SET client_min_messages TO 'warning';
DROP USER IF EXISTS regress_rls_alice;
DROP USER IF EXISTS regress_rls_bob;
DROP USER IF EXISTS regress_rls_carol;
DROP USER IF EXISTS regress_rls_dave;
DROP USER IF EXISTS regress_rls_exempt_user;
DROP ROLE IF EXISTS regress_rls_group1;
DROP ROLE IF EXISTS regress_rls_group2;
DROP SCHEMA IF EXISTS regress_rls_schema CASCADE;
RESET client_min_messages;
-- initial setup
CREATE USER regress_rls_alice NOLOGIN;
CREATE USER regress_rls_bob NOLOGIN;
CREATE USER regress_rls_carol NOLOGIN;
CREATE USER regress_rls_dave NOLOGIN;
CREATE USER regress_rls_exempt_user BYPASSRLS NOLOGIN;
CREATE ROLE regress_rls_group1 NOLOGIN;
CREATE ROLE regress_rls_group2 NOLOGIN;
GRANT regress_rls_group1 TO regress_rls_bob;
GRANT regress_rls_group2 TO regress_rls_carol;
CREATE SCHEMA regress_rls_schema;
GRANT ALL ON SCHEMA regress_rls_schema to public;
SET search_path = regress_rls_schema;
-- setup of malicious function
CREATE OR REPLACE FUNCTION f_leak(text) RETURNS bool
COST 0.0000001 LANGUAGE plpgsql
AS 'BEGIN RAISE NOTICE ''f_leak => %'', $1; RETURN true; END';
GRANT EXECUTE ON FUNCTION f_leak(text) TO public;
-- BASIC Row-Level Security Scenario
SET SESSION AUTHORIZATION regress_rls_alice;
CREATE TABLE uaccount (
pguser name primary key,
seclv int
);
GRANT SELECT ON uaccount TO public;
INSERT INTO uaccount VALUES
('regress_rls_alice', 99),
('regress_rls_bob', 1),
('regress_rls_carol', 2),
('regress_rls_dave', 3);
CREATE TABLE category (
cid int primary key,
cname text
);
GRANT ALL ON category TO public;
INSERT INTO category VALUES
(11, 'novel'),
(22, 'science fiction'),
(33, 'technology'),
(44, 'manga');
CREATE TABLE document (
did int primary key,
cid int references category(cid),
dlevel int not null,
dauthor name,
dtitle text
);
GRANT ALL ON document TO public;
INSERT INTO document VALUES
( 1, 11, 1, 'regress_rls_bob', 'my first novel'),
( 2, 11, 2, 'regress_rls_bob', 'my second novel'),
( 3, 22, 2, 'regress_rls_bob', 'my science fiction'),
( 4, 44, 1, 'regress_rls_bob', 'my first manga'),
( 5, 44, 2, 'regress_rls_bob', 'my second manga'),
( 6, 22, 1, 'regress_rls_carol', 'great science fiction'),
( 7, 33, 2, 'regress_rls_carol', 'great technology book'),
( 8, 44, 1, 'regress_rls_carol', 'great manga'),
( 9, 22, 1, 'regress_rls_dave', 'awesome science fiction'),
(10, 33, 2, 'regress_rls_dave', 'awesome technology book');
ALTER TABLE document ENABLE ROW LEVEL SECURITY;
-- user's security level must be higher than or equal to document's
CREATE POLICY p1 ON document AS PERMISSIVE
USING (dlevel <= (SELECT seclv FROM uaccount WHERE pguser = current_user));
-- try to create a policy of bogus type
CREATE POLICY p1 ON document AS UGLY
USING (dlevel <= (SELECT seclv FROM uaccount WHERE pguser = current_user));
ERROR: unrecognized row security option "ugly"
LINE 1: CREATE POLICY p1 ON document AS UGLY
^
HINT: Only PERMISSIVE or RESTRICTIVE policies are supported currently.
-- but Dave isn't allowed to anything at cid 50 or above
-- this is to make sure that we sort the policies by name first
-- when applying WITH CHECK, a later INSERT by Dave should fail due
-- to p1r first
CREATE POLICY p2r ON document AS RESTRICTIVE TO regress_rls_dave
USING (cid <> 44 AND cid < 50);
-- and Dave isn't allowed to see manga documents
CREATE POLICY p1r ON document AS RESTRICTIVE TO regress_rls_dave
USING (cid <> 44);
\dp
Access privileges
Schema | Name | Type | Access privileges | Column privileges | Policies
--------------------+----------+-------+---------------------------------------------+-------------------+--------------------------------------------
regress_rls_schema | category | table | regress_rls_alice=arwdDxt/regress_rls_alice+| |
| | | =arwdDxt/regress_rls_alice | |
regress_rls_schema | document | table | regress_rls_alice=arwdDxt/regress_rls_alice+| | p1: +
| | | =arwdDxt/regress_rls_alice | | (u): (dlevel <= ( SELECT uaccount.seclv +
| | | | | FROM uaccount +
| | | | | WHERE (uaccount.pguser = CURRENT_USER)))+
| | | | | p2r (RESTRICTIVE): +
| | | | | (u): ((cid <> 44) AND (cid < 50)) +
| | | | | to: regress_rls_dave +
| | | | | p1r (RESTRICTIVE): +
| | | | | (u): (cid <> 44) +
| | | | | to: regress_rls_dave
regress_rls_schema | uaccount | table | regress_rls_alice=arwdDxt/regress_rls_alice+| |
| | | =r/regress_rls_alice | |
(3 rows)
\d document
Table "regress_rls_schema.document"
Column | Type | Collation | Nullable | Default
---------+---------+-----------+----------+---------
did | integer | | not null |
cid | integer | | |
dlevel | integer | | not null |
dauthor | name | | |
dtitle | text | | |
Indexes:
"document_pkey" PRIMARY KEY, btree (did)
Foreign-key constraints:
"document_cid_fkey" FOREIGN KEY (cid) REFERENCES category(cid)
Policies:
POLICY "p1"
USING ((dlevel <= ( SELECT uaccount.seclv
FROM uaccount
WHERE (uaccount.pguser = CURRENT_USER))))
POLICY "p1r" AS RESTRICTIVE
TO regress_rls_dave
USING ((cid <> 44))
POLICY "p2r" AS RESTRICTIVE
TO regress_rls_dave
USING (((cid <> 44) AND (cid < 50)))
SELECT * FROM pg_policies WHERE schemaname = 'regress_rls_schema' AND tablename = 'document' ORDER BY policyname;
schemaname | tablename | policyname | permissive | roles | cmd | qual | with_check
--------------------+-----------+------------+-------------+--------------------+-----+--------------------------------------------+------------
regress_rls_schema | document | p1 | PERMISSIVE | {public} | ALL | (dlevel <= ( SELECT uaccount.seclv +|
| | | | | | FROM uaccount +|
| | | | | | WHERE (uaccount.pguser = CURRENT_USER))) |
regress_rls_schema | document | p1r | RESTRICTIVE | {regress_rls_dave} | ALL | (cid <> 44) |
regress_rls_schema | document | p2r | RESTRICTIVE | {regress_rls_dave} | ALL | ((cid <> 44) AND (cid < 50)) |
(3 rows)
-- viewpoint from regress_rls_bob
SET SESSION AUTHORIZATION regress_rls_bob;
SET row_security TO ON;
SELECT * FROM document WHERE f_leak(dtitle) ORDER BY did;
NOTICE: f_leak => my first novel
NOTICE: f_leak => my first manga
NOTICE: f_leak => great science fiction
NOTICE: f_leak => great manga
NOTICE: f_leak => awesome science fiction
did | cid | dlevel | dauthor | dtitle
-----+-----+--------+-------------------+-------------------------
1 | 11 | 1 | regress_rls_bob | my first novel
4 | 44 | 1 | regress_rls_bob | my first manga
6 | 22 | 1 | regress_rls_carol | great science fiction
8 | 44 | 1 | regress_rls_carol | great manga
9 | 22 | 1 | regress_rls_dave | awesome science fiction
(5 rows)
SELECT * FROM document NATURAL JOIN category WHERE f_leak(dtitle) ORDER BY did;
NOTICE: f_leak => my first novel
NOTICE: f_leak => my first manga
NOTICE: f_leak => great science fiction
NOTICE: f_leak => great manga
NOTICE: f_leak => awesome science fiction
cid | did | dlevel | dauthor | dtitle | cname
-----+-----+--------+-------------------+-------------------------+-----------------
11 | 1 | 1 | regress_rls_bob | my first novel | novel
44 | 4 | 1 | regress_rls_bob | my first manga | manga
22 | 6 | 1 | regress_rls_carol | great science fiction | science fiction
44 | 8 | 1 | regress_rls_carol | great manga | manga
22 | 9 | 1 | regress_rls_dave | awesome science fiction | science fiction
(5 rows)
-- try a sampled version
SELECT * FROM document TABLESAMPLE BERNOULLI(50) REPEATABLE(0)
WHERE f_leak(dtitle) ORDER BY did;
NOTICE: f_leak => my first manga
NOTICE: f_leak => great science fiction
NOTICE: f_leak => great manga
NOTICE: f_leak => awesome science fiction
did | cid | dlevel | dauthor | dtitle
-----+-----+--------+-------------------+-------------------------
4 | 44 | 1 | regress_rls_bob | my first manga
6 | 22 | 1 | regress_rls_carol | great science fiction
8 | 44 | 1 | regress_rls_carol | great manga
9 | 22 | 1 | regress_rls_dave | awesome science fiction
(4 rows)
-- viewpoint from regress_rls_carol
SET SESSION AUTHORIZATION regress_rls_carol;
SELECT * FROM document WHERE f_leak(dtitle) ORDER BY did;
NOTICE: f_leak => my first novel
NOTICE: f_leak => my second novel
NOTICE: f_leak => my science fiction
NOTICE: f_leak => my first manga
NOTICE: f_leak => my second manga
NOTICE: f_leak => great science fiction
NOTICE: f_leak => great technology book
NOTICE: f_leak => great manga
NOTICE: f_leak => awesome science fiction
NOTICE: f_leak => awesome technology book
did | cid | dlevel | dauthor | dtitle
-----+-----+--------+-------------------+-------------------------
1 | 11 | 1 | regress_rls_bob | my first novel
2 | 11 | 2 | regress_rls_bob | my second novel
3 | 22 | 2 | regress_rls_bob | my science fiction
4 | 44 | 1 | regress_rls_bob | my first manga
5 | 44 | 2 | regress_rls_bob | my second manga
6 | 22 | 1 | regress_rls_carol | great science fiction
7 | 33 | 2 | regress_rls_carol | great technology book
8 | 44 | 1 | regress_rls_carol | great manga
9 | 22 | 1 | regress_rls_dave | awesome science fiction
10 | 33 | 2 | regress_rls_dave | awesome technology book
(10 rows)
SELECT * FROM document NATURAL JOIN category WHERE f_leak(dtitle) ORDER BY did;
NOTICE: f_leak => my first novel
NOTICE: f_leak => my second novel
NOTICE: f_leak => my science fiction
NOTICE: f_leak => my first manga
NOTICE: f_leak => my second manga
NOTICE: f_leak => great science fiction
NOTICE: f_leak => great technology book
NOTICE: f_leak => great manga
NOTICE: f_leak => awesome science fiction
NOTICE: f_leak => awesome technology book
cid | did | dlevel | dauthor | dtitle | cname
-----+-----+--------+-------------------+-------------------------+-----------------
11 | 1 | 1 | regress_rls_bob | my first novel | novel
11 | 2 | 2 | regress_rls_bob | my second novel | novel
22 | 3 | 2 | regress_rls_bob | my science fiction | science fiction
44 | 4 | 1 | regress_rls_bob | my first manga | manga
44 | 5 | 2 | regress_rls_bob | my second manga | manga
22 | 6 | 1 | regress_rls_carol | great science fiction | science fiction
33 | 7 | 2 | regress_rls_carol | great technology book | technology
44 | 8 | 1 | regress_rls_carol | great manga | manga
22 | 9 | 1 | regress_rls_dave | awesome science fiction | science fiction
33 | 10 | 2 | regress_rls_dave | awesome technology book | technology
(10 rows)
-- try a sampled version
SELECT * FROM document TABLESAMPLE BERNOULLI(50) REPEATABLE(0)
WHERE f_leak(dtitle) ORDER BY did;
NOTICE: f_leak => my first manga
NOTICE: f_leak => my second manga
NOTICE: f_leak => great science fiction
NOTICE: f_leak => great manga
NOTICE: f_leak => awesome science fiction
did | cid | dlevel | dauthor | dtitle
-----+-----+--------+-------------------+-------------------------
4 | 44 | 1 | regress_rls_bob | my first manga
5 | 44 | 2 | regress_rls_bob | my second manga
6 | 22 | 1 | regress_rls_carol | great science fiction
8 | 44 | 1 | regress_rls_carol | great manga
9 | 22 | 1 | regress_rls_dave | awesome science fiction
(5 rows)
EXPLAIN (COSTS OFF) SELECT * FROM document WHERE f_leak(dtitle);
QUERY PLAN
----------------------------------------------------
Seq Scan on document
Filter: ((dlevel <= $0) AND f_leak(dtitle))
InitPlan 1 (returns $0)
-> Index Scan using uaccount_pkey on uaccount
Index Cond: (pguser = CURRENT_USER)
(5 rows)
EXPLAIN (COSTS OFF) SELECT * FROM document NATURAL JOIN category WHERE f_leak(dtitle);
QUERY PLAN
-----------------------------------------------------------
Hash Join
Hash Cond: (category.cid = document.cid)
InitPlan 1 (returns $0)
-> Index Scan using uaccount_pkey on uaccount
Index Cond: (pguser = CURRENT_USER)
-> Seq Scan on category
-> Hash
-> Seq Scan on document
Filter: ((dlevel <= $0) AND f_leak(dtitle))
(9 rows)
-- viewpoint from regress_rls_dave
SET SESSION AUTHORIZATION regress_rls_dave;
SELECT * FROM document WHERE f_leak(dtitle) ORDER BY did;
NOTICE: f_leak => my first novel
NOTICE: f_leak => my second novel
NOTICE: f_leak => my science fiction
NOTICE: f_leak => great science fiction
NOTICE: f_leak => great technology book
NOTICE: f_leak => awesome science fiction
NOTICE: f_leak => awesome technology book
did | cid | dlevel | dauthor | dtitle
-----+-----+--------+-------------------+-------------------------
1 | 11 | 1 | regress_rls_bob | my first novel
2 | 11 | 2 | regress_rls_bob | my second novel
3 | 22 | 2 | regress_rls_bob | my science fiction
6 | 22 | 1 | regress_rls_carol | great science fiction
7 | 33 | 2 | regress_rls_carol | great technology book
9 | 22 | 1 | regress_rls_dave | awesome science fiction
10 | 33 | 2 | regress_rls_dave | awesome technology book
(7 rows)
SELECT * FROM document NATURAL JOIN category WHERE f_leak(dtitle) ORDER BY did;
NOTICE: f_leak => my first novel
NOTICE: f_leak => my second novel
NOTICE: f_leak => my science fiction
NOTICE: f_leak => great science fiction
NOTICE: f_leak => great technology book
NOTICE: f_leak => awesome science fiction
NOTICE: f_leak => awesome technology book
cid | did | dlevel | dauthor | dtitle | cname
-----+-----+--------+-------------------+-------------------------+-----------------
11 | 1 | 1 | regress_rls_bob | my first novel | novel
11 | 2 | 2 | regress_rls_bob | my second novel | novel
22 | 3 | 2 | regress_rls_bob | my science fiction | science fiction
22 | 6 | 1 | regress_rls_carol | great science fiction | science fiction
33 | 7 | 2 | regress_rls_carol | great technology book | technology
22 | 9 | 1 | regress_rls_dave | awesome science fiction | science fiction
33 | 10 | 2 | regress_rls_dave | awesome technology book | technology
(7 rows)
EXPLAIN (COSTS OFF) SELECT * FROM document WHERE f_leak(dtitle);
QUERY PLAN
----------------------------------------------------------------------------------------------
Seq Scan on document
Filter: ((cid <> 44) AND (cid <> 44) AND (cid < 50) AND (dlevel <= $0) AND f_leak(dtitle))
InitPlan 1 (returns $0)
-> Index Scan using uaccount_pkey on uaccount
Index Cond: (pguser = CURRENT_USER)
(5 rows)
EXPLAIN (COSTS OFF) SELECT * FROM document NATURAL JOIN category WHERE f_leak(dtitle);
QUERY PLAN
----------------------------------------------------------------------------------------------------------
Hash Join
Hash Cond: (category.cid = document.cid)
InitPlan 1 (returns $0)
-> Index Scan using uaccount_pkey on uaccount
Index Cond: (pguser = CURRENT_USER)
-> Seq Scan on category
-> Hash
-> Seq Scan on document
Filter: ((cid <> 44) AND (cid <> 44) AND (cid < 50) AND (dlevel <= $0) AND f_leak(dtitle))
(9 rows)
-- 44 would technically fail for both p2r and p1r, but we should get an error
-- back from p1r for this because it sorts first
INSERT INTO document VALUES (100, 44, 1, 'regress_rls_dave', 'testing sorting of policies'); -- fail
ERROR: new row violates row-level security policy "p1r" for table "document"
-- Just to see a p2r error
INSERT INTO document VALUES (100, 55, 1, 'regress_rls_dave', 'testing sorting of policies'); -- fail
ERROR: new row violates row-level security policy "p2r" for table "document"
-- only owner can change policies
ALTER POLICY p1 ON document USING (true); --fail
ERROR: must be owner of relation document
DROP POLICY p1 ON document; --fail
ERROR: must be owner of relation document
SET SESSION AUTHORIZATION regress_rls_alice;
ALTER POLICY p1 ON document USING (dauthor = current_user);
-- viewpoint from regress_rls_bob again
SET SESSION AUTHORIZATION regress_rls_bob;
SELECT * FROM document WHERE f_leak(dtitle) ORDER BY did;
NOTICE: f_leak => my first novel
NOTICE: f_leak => my second novel
NOTICE: f_leak => my science fiction
NOTICE: f_leak => my first manga
NOTICE: f_leak => my second manga
did | cid | dlevel | dauthor | dtitle
-----+-----+--------+-----------------+--------------------
1 | 11 | 1 | regress_rls_bob | my first novel
2 | 11 | 2 | regress_rls_bob | my second novel
3 | 22 | 2 | regress_rls_bob | my science fiction
4 | 44 | 1 | regress_rls_bob | my first manga
5 | 44 | 2 | regress_rls_bob | my second manga
(5 rows)
SELECT * FROM document NATURAL JOIN category WHERE f_leak(dtitle) ORDER by did;
NOTICE: f_leak => my first novel
NOTICE: f_leak => my second novel
NOTICE: f_leak => my science fiction
NOTICE: f_leak => my first manga
NOTICE: f_leak => my second manga
cid | did | dlevel | dauthor | dtitle | cname
-----+-----+--------+-----------------+--------------------+-----------------
11 | 1 | 1 | regress_rls_bob | my first novel | novel
11 | 2 | 2 | regress_rls_bob | my second novel | novel
22 | 3 | 2 | regress_rls_bob | my science fiction | science fiction
44 | 4 | 1 | regress_rls_bob | my first manga | manga
44 | 5 | 2 | regress_rls_bob | my second manga | manga
(5 rows)
-- viewpoint from rls_regres_carol again
SET SESSION AUTHORIZATION regress_rls_carol;
SELECT * FROM document WHERE f_leak(dtitle) ORDER BY did;
NOTICE: f_leak => great science fiction
NOTICE: f_leak => great technology book
NOTICE: f_leak => great manga
did | cid | dlevel | dauthor | dtitle
-----+-----+--------+-------------------+-----------------------
6 | 22 | 1 | regress_rls_carol | great science fiction
7 | 33 | 2 | regress_rls_carol | great technology book
8 | 44 | 1 | regress_rls_carol | great manga
(3 rows)
SELECT * FROM document NATURAL JOIN category WHERE f_leak(dtitle) ORDER by did;
NOTICE: f_leak => great science fiction
NOTICE: f_leak => great technology book
NOTICE: f_leak => great manga
cid | did | dlevel | dauthor | dtitle | cname
-----+-----+--------+-------------------+-----------------------+-----------------
22 | 6 | 1 | regress_rls_carol | great science fiction | science fiction
33 | 7 | 2 | regress_rls_carol | great technology book | technology
44 | 8 | 1 | regress_rls_carol | great manga | manga
(3 rows)
EXPLAIN (COSTS OFF) SELECT * FROM document WHERE f_leak(dtitle);
QUERY PLAN
---------------------------------------------------------
Seq Scan on document
Filter: ((dauthor = CURRENT_USER) AND f_leak(dtitle))
(2 rows)
EXPLAIN (COSTS OFF) SELECT * FROM document NATURAL JOIN category WHERE f_leak(dtitle);
QUERY PLAN
---------------------------------------------------------------
Nested Loop
-> Seq Scan on document
Filter: ((dauthor = CURRENT_USER) AND f_leak(dtitle))
-> Index Scan using category_pkey on category
Index Cond: (cid = document.cid)
(5 rows)
-- interaction of FK/PK constraints
SET SESSION AUTHORIZATION regress_rls_alice;
CREATE POLICY p2 ON category
USING (CASE WHEN current_user = 'regress_rls_bob' THEN cid IN (11, 33)
WHEN current_user = 'regress_rls_carol' THEN cid IN (22, 44)
ELSE false END);
ALTER TABLE category ENABLE ROW LEVEL SECURITY;
-- cannot delete PK referenced by invisible FK
SET SESSION AUTHORIZATION regress_rls_bob;
SELECT * FROM document d FULL OUTER JOIN category c on d.cid = c.cid ORDER BY d.did, c.cid;
did | cid | dlevel | dauthor | dtitle | cid | cname
-----+-----+--------+-----------------+--------------------+-----+------------
1 | 11 | 1 | regress_rls_bob | my first novel | 11 | novel
2 | 11 | 2 | regress_rls_bob | my second novel | 11 | novel
3 | 22 | 2 | regress_rls_bob | my science fiction | |
4 | 44 | 1 | regress_rls_bob | my first manga | |
5 | 44 | 2 | regress_rls_bob | my second manga | |
| | | | | 33 | technology
(6 rows)
DELETE FROM category WHERE cid = 33; -- fails with FK violation
ERROR: update or delete on table "category" violates foreign key constraint "document_cid_fkey" on table "document"
DETAIL: Key is still referenced from table "document".
-- can insert FK referencing invisible PK
SET SESSION AUTHORIZATION regress_rls_carol;
SELECT * FROM document d FULL OUTER JOIN category c on d.cid = c.cid ORDER BY d.did, c.cid;
did | cid | dlevel | dauthor | dtitle | cid | cname
-----+-----+--------+-------------------+-----------------------+-----+-----------------
6 | 22 | 1 | regress_rls_carol | great science fiction | 22 | science fiction
7 | 33 | 2 | regress_rls_carol | great technology book | |
8 | 44 | 1 | regress_rls_carol | great manga | 44 | manga
(3 rows)
INSERT INTO document VALUES (11, 33, 1, current_user, 'hoge');
-- UNIQUE or PRIMARY KEY constraint violation DOES reveal presence of row
SET SESSION AUTHORIZATION regress_rls_bob;
INSERT INTO document VALUES (8, 44, 1, 'regress_rls_bob', 'my third manga'); -- Must fail with unique violation, revealing presence of did we can't see
ERROR: duplicate key value violates unique constraint "document_pkey"
SELECT * FROM document WHERE did = 8; -- and confirm we can't see it
did | cid | dlevel | dauthor | dtitle
-----+-----+--------+---------+--------
(0 rows)
-- RLS policies are checked before constraints
INSERT INTO document VALUES (8, 44, 1, 'regress_rls_carol', 'my third manga'); -- Should fail with RLS check violation, not duplicate key violation
ERROR: new row violates row-level security policy for table "document"
UPDATE document SET did = 8, dauthor = 'regress_rls_carol' WHERE did = 5; -- Should fail with RLS check violation, not duplicate key violation
ERROR: new row violates row-level security policy for table "document"
-- database superuser does bypass RLS policy when enabled
RESET SESSION AUTHORIZATION;
SET row_security TO ON;
SELECT * FROM document;
did | cid | dlevel | dauthor | dtitle
-----+-----+--------+-------------------+-------------------------
1 | 11 | 1 | regress_rls_bob | my first novel
2 | 11 | 2 | regress_rls_bob | my second novel
3 | 22 | 2 | regress_rls_bob | my science fiction
4 | 44 | 1 | regress_rls_bob | my first manga
5 | 44 | 2 | regress_rls_bob | my second manga
6 | 22 | 1 | regress_rls_carol | great science fiction
7 | 33 | 2 | regress_rls_carol | great technology book
8 | 44 | 1 | regress_rls_carol | great manga
9 | 22 | 1 | regress_rls_dave | awesome science fiction
10 | 33 | 2 | regress_rls_dave | awesome technology book
11 | 33 | 1 | regress_rls_carol | hoge
(11 rows)
SELECT * FROM category;
cid | cname
-----+-----------------
11 | novel
22 | science fiction
33 | technology
44 | manga
(4 rows)
-- database superuser does bypass RLS policy when disabled
RESET SESSION AUTHORIZATION;
SET row_security TO OFF;
SELECT * FROM document;
did | cid | dlevel | dauthor | dtitle
-----+-----+--------+-------------------+-------------------------
1 | 11 | 1 | regress_rls_bob | my first novel
2 | 11 | 2 | regress_rls_bob | my second novel
3 | 22 | 2 | regress_rls_bob | my science fiction
4 | 44 | 1 | regress_rls_bob | my first manga
5 | 44 | 2 | regress_rls_bob | my second manga
6 | 22 | 1 | regress_rls_carol | great science fiction
7 | 33 | 2 | regress_rls_carol | great technology book
8 | 44 | 1 | regress_rls_carol | great manga
9 | 22 | 1 | regress_rls_dave | awesome science fiction
10 | 33 | 2 | regress_rls_dave | awesome technology book
11 | 33 | 1 | regress_rls_carol | hoge
(11 rows)
SELECT * FROM category;
cid | cname
-----+-----------------
11 | novel
22 | science fiction
33 | technology
44 | manga
(4 rows)
-- database non-superuser with bypass privilege can bypass RLS policy when disabled
SET SESSION AUTHORIZATION regress_rls_exempt_user;
SET row_security TO OFF;
SELECT * FROM document;
did | cid | dlevel | dauthor | dtitle
-----+-----+--------+-------------------+-------------------------
1 | 11 | 1 | regress_rls_bob | my first novel
2 | 11 | 2 | regress_rls_bob | my second novel
3 | 22 | 2 | regress_rls_bob | my science fiction
4 | 44 | 1 | regress_rls_bob | my first manga
5 | 44 | 2 | regress_rls_bob | my second manga
6 | 22 | 1 | regress_rls_carol | great science fiction
7 | 33 | 2 | regress_rls_carol | great technology book
8 | 44 | 1 | regress_rls_carol | great manga
9 | 22 | 1 | regress_rls_dave | awesome science fiction
10 | 33 | 2 | regress_rls_dave | awesome technology book
11 | 33 | 1 | regress_rls_carol | hoge
(11 rows)
SELECT * FROM category;
cid | cname
-----+-----------------
11 | novel
22 | science fiction
33 | technology
44 | manga
(4 rows)
-- RLS policy does not apply to table owner when RLS enabled.
SET SESSION AUTHORIZATION regress_rls_alice;
SET row_security TO ON;
SELECT * FROM document;
did | cid | dlevel | dauthor | dtitle
-----+-----+--------+-------------------+-------------------------
1 | 11 | 1 | regress_rls_bob | my first novel
2 | 11 | 2 | regress_rls_bob | my second novel
3 | 22 | 2 | regress_rls_bob | my science fiction
4 | 44 | 1 | regress_rls_bob | my first manga
5 | 44 | 2 | regress_rls_bob | my second manga
6 | 22 | 1 | regress_rls_carol | great science fiction
7 | 33 | 2 | regress_rls_carol | great technology book
8 | 44 | 1 | regress_rls_carol | great manga
9 | 22 | 1 | regress_rls_dave | awesome science fiction
10 | 33 | 2 | regress_rls_dave | awesome technology book
11 | 33 | 1 | regress_rls_carol | hoge
(11 rows)
SELECT * FROM category;
cid | cname
-----+-----------------
11 | novel
22 | science fiction
33 | technology
44 | manga
(4 rows)
-- RLS policy does not apply to table owner when RLS disabled.
SET SESSION AUTHORIZATION regress_rls_alice;
SET row_security TO OFF;
SELECT * FROM document;
did | cid | dlevel | dauthor | dtitle
-----+-----+--------+-------------------+-------------------------
1 | 11 | 1 | regress_rls_bob | my first novel
2 | 11 | 2 | regress_rls_bob | my second novel
3 | 22 | 2 | regress_rls_bob | my science fiction
4 | 44 | 1 | regress_rls_bob | my first manga
5 | 44 | 2 | regress_rls_bob | my second manga
6 | 22 | 1 | regress_rls_carol | great science fiction
7 | 33 | 2 | regress_rls_carol | great technology book
8 | 44 | 1 | regress_rls_carol | great manga
9 | 22 | 1 | regress_rls_dave | awesome science fiction
10 | 33 | 2 | regress_rls_dave | awesome technology book
11 | 33 | 1 | regress_rls_carol | hoge
(11 rows)
SELECT * FROM category;
cid | cname
-----+-----------------
11 | novel
22 | science fiction
33 | technology
44 | manga
(4 rows)
--
-- Table inheritance and RLS policy
--
SET SESSION AUTHORIZATION regress_rls_alice;
SET row_security TO ON;
CREATE TABLE t1 (a int, junk1 text, b text) WITH OIDS;
ALTER TABLE t1 DROP COLUMN junk1; -- just a disturbing factor
GRANT ALL ON t1 TO public;
COPY t1 FROM stdin WITH (oids);
CREATE TABLE t2 (c float) INHERITS (t1);
GRANT ALL ON t2 TO public;
COPY t2 FROM stdin WITH (oids);
CREATE TABLE t3 (c text, b text, a int) WITH OIDS;
ALTER TABLE t3 INHERIT t1;
GRANT ALL ON t3 TO public;
COPY t3(a,b,c) FROM stdin WITH (oids);
CREATE POLICY p1 ON t1 FOR ALL TO PUBLIC USING (a % 2 = 0); -- be even number
CREATE POLICY p2 ON t2 FOR ALL TO PUBLIC USING (a % 2 = 1); -- be odd number
ALTER TABLE t1 ENABLE ROW LEVEL SECURITY;
ALTER TABLE t2 ENABLE ROW LEVEL SECURITY;
SET SESSION AUTHORIZATION regress_rls_bob;
SELECT * FROM t1;
a | b
---+-----
2 | bbb
4 | dad
2 | bcd
4 | def
2 | yyy
(5 rows)
EXPLAIN (COSTS OFF) SELECT * FROM t1;
QUERY PLAN
-------------------------------
Append
-> Seq Scan on t1
Filter: ((a % 2) = 0)
-> Seq Scan on t2
Filter: ((a % 2) = 0)
-> Seq Scan on t3
Filter: ((a % 2) = 0)
(7 rows)
SELECT * FROM t1 WHERE f_leak(b);
NOTICE: f_leak => bbb
NOTICE: f_leak => dad
NOTICE: f_leak => bcd
NOTICE: f_leak => def
NOTICE: f_leak => yyy
a | b
---+-----
2 | bbb
4 | dad
2 | bcd
4 | def
2 | yyy
(5 rows)
EXPLAIN (COSTS OFF) SELECT * FROM t1 WHERE f_leak(b);
QUERY PLAN
-----------------------------------------------
Append
-> Seq Scan on t1
Filter: (((a % 2) = 0) AND f_leak(b))
-> Seq Scan on t2
Filter: (((a % 2) = 0) AND f_leak(b))
-> Seq Scan on t3
Filter: (((a % 2) = 0) AND f_leak(b))
(7 rows)
-- reference to system column
SELECT oid, * FROM t1;
oid | a | b
-----+---+-----
102 | 2 | bbb
104 | 4 | dad
202 | 2 | bcd
204 | 4 | def
302 | 2 | yyy
(5 rows)
EXPLAIN (COSTS OFF) SELECT *, t1 FROM t1;
QUERY PLAN
-------------------------------
Append
-> Seq Scan on t1
Filter: ((a % 2) = 0)
-> Seq Scan on t2
Filter: ((a % 2) = 0)
-> Seq Scan on t3
Filter: ((a % 2) = 0)
(7 rows)
-- reference to whole-row reference
SELECT *, t1 FROM t1;
a | b | t1
---+-----+---------
2 | bbb | (2,bbb)
4 | dad | (4,dad)
2 | bcd | (2,bcd)
4 | def | (4,def)
2 | yyy | (2,yyy)
(5 rows)
EXPLAIN (COSTS OFF) SELECT *, t1 FROM t1;
QUERY PLAN
-------------------------------
Append
-> Seq Scan on t1
Filter: ((a % 2) = 0)
-> Seq Scan on t2
Filter: ((a % 2) = 0)
-> Seq Scan on t3
Filter: ((a % 2) = 0)
(7 rows)
-- for share/update lock
SELECT * FROM t1 FOR SHARE;
a | b
---+-----
2 | bbb
4 | dad
2 | bcd
4 | def
2 | yyy
(5 rows)
EXPLAIN (COSTS OFF) SELECT * FROM t1 FOR SHARE;
QUERY PLAN
-------------------------------------
LockRows
-> Append
-> Seq Scan on t1
Filter: ((a % 2) = 0)
-> Seq Scan on t2
Filter: ((a % 2) = 0)
-> Seq Scan on t3
Filter: ((a % 2) = 0)
(8 rows)
SELECT * FROM t1 WHERE f_leak(b) FOR SHARE;
NOTICE: f_leak => bbb
NOTICE: f_leak => dad
NOTICE: f_leak => bcd
NOTICE: f_leak => def
NOTICE: f_leak => yyy
a | b
---+-----
2 | bbb
4 | dad
2 | bcd
4 | def
2 | yyy
(5 rows)
EXPLAIN (COSTS OFF) SELECT * FROM t1 WHERE f_leak(b) FOR SHARE;
QUERY PLAN
-----------------------------------------------------
LockRows
-> Append
-> Seq Scan on t1
Filter: (((a % 2) = 0) AND f_leak(b))
-> Seq Scan on t2
Filter: (((a % 2) = 0) AND f_leak(b))
-> Seq Scan on t3
Filter: (((a % 2) = 0) AND f_leak(b))
(8 rows)
-- union all query
SELECT a, b, oid FROM t2 UNION ALL SELECT a, b, oid FROM t3;
a | b | oid
---+-----+-----
1 | abc | 201
3 | cde | 203
1 | xxx | 301
2 | yyy | 302
3 | zzz | 303
(5 rows)
EXPLAIN (COSTS OFF) SELECT a, b, oid FROM t2 UNION ALL SELECT a, b, oid FROM t3;
QUERY PLAN
-------------------------------
Append
-> Seq Scan on t2
Filter: ((a % 2) = 1)
-> Seq Scan on t3
(4 rows)
-- superuser is allowed to bypass RLS checks
RESET SESSION AUTHORIZATION;
SET row_security TO OFF;
SELECT * FROM t1 WHERE f_leak(b);
NOTICE: f_leak => aba
NOTICE: f_leak => bbb
NOTICE: f_leak => ccc
NOTICE: f_leak => dad
NOTICE: f_leak => abc
NOTICE: f_leak => bcd
NOTICE: f_leak => cde
NOTICE: f_leak => def
NOTICE: f_leak => xxx
NOTICE: f_leak => yyy
NOTICE: f_leak => zzz
a | b
---+-----
1 | aba
2 | bbb
3 | ccc
4 | dad
1 | abc
2 | bcd
3 | cde
4 | def
1 | xxx
2 | yyy
3 | zzz
(11 rows)
EXPLAIN (COSTS OFF) SELECT * FROM t1 WHERE f_leak(b);
QUERY PLAN
---------------------------
Append
-> Seq Scan on t1
Filter: f_leak(b)
-> Seq Scan on t2
Filter: f_leak(b)
-> Seq Scan on t3
Filter: f_leak(b)
(7 rows)
-- non-superuser with bypass privilege can bypass RLS policy when disabled
SET SESSION AUTHORIZATION regress_rls_exempt_user;
SET row_security TO OFF;
SELECT * FROM t1 WHERE f_leak(b);
NOTICE: f_leak => aba
NOTICE: f_leak => bbb
NOTICE: f_leak => ccc
NOTICE: f_leak => dad
NOTICE: f_leak => abc
NOTICE: f_leak => bcd
NOTICE: f_leak => cde
NOTICE: f_leak => def
NOTICE: f_leak => xxx
NOTICE: f_leak => yyy
NOTICE: f_leak => zzz
a | b
---+-----
1 | aba
2 | bbb
3 | ccc
4 | dad
1 | abc
2 | bcd
3 | cde
4 | def
1 | xxx
2 | yyy
3 | zzz
(11 rows)
EXPLAIN (COSTS OFF) SELECT * FROM t1 WHERE f_leak(b);
QUERY PLAN
---------------------------
Append
-> Seq Scan on t1
Filter: f_leak(b)
-> Seq Scan on t2
Filter: f_leak(b)
-> Seq Scan on t3
Filter: f_leak(b)
(7 rows)
--
-- Partitioned Tables
--
SET SESSION AUTHORIZATION regress_rls_alice;
CREATE TABLE part_document (
did int,
cid int,
dlevel int not null,
dauthor name,
dtitle text
) PARTITION BY RANGE (cid);
GRANT ALL ON part_document TO public;
-- Create partitions for document categories
CREATE TABLE part_document_fiction PARTITION OF part_document FOR VALUES FROM (11) to (12);
CREATE TABLE part_document_satire PARTITION OF part_document FOR VALUES FROM (55) to (56);
CREATE TABLE part_document_nonfiction PARTITION OF part_document FOR VALUES FROM (99) to (100);
GRANT ALL ON part_document_fiction TO public;
GRANT ALL ON part_document_satire TO public;
GRANT ALL ON part_document_nonfiction TO public;
INSERT INTO part_document VALUES
( 1, 11, 1, 'regress_rls_bob', 'my first novel'),
( 2, 11, 2, 'regress_rls_bob', 'my second novel'),
( 3, 99, 2, 'regress_rls_bob', 'my science textbook'),
( 4, 55, 1, 'regress_rls_bob', 'my first satire'),
( 5, 99, 2, 'regress_rls_bob', 'my history book'),
( 6, 11, 1, 'regress_rls_carol', 'great science fiction'),
( 7, 99, 2, 'regress_rls_carol', 'great technology book'),
( 8, 55, 2, 'regress_rls_carol', 'great satire'),
( 9, 11, 1, 'regress_rls_dave', 'awesome science fiction'),
(10, 99, 2, 'regress_rls_dave', 'awesome technology book');
ALTER TABLE part_document ENABLE ROW LEVEL SECURITY;
-- Create policy on parent
-- user's security level must be higher than or equal to document's
CREATE POLICY pp1 ON part_document AS PERMISSIVE
USING (dlevel <= (SELECT seclv FROM uaccount WHERE pguser = current_user));
-- Dave is only allowed to see cid < 55
CREATE POLICY pp1r ON part_document AS RESTRICTIVE TO regress_rls_dave
USING (cid < 55);
\d+ part_document
Table "regress_rls_schema.part_document"
Column | Type | Collation | Nullable | Default | Storage | Stats target | Description
---------+---------+-----------+----------+---------+----------+--------------+-------------
did | integer | | | | plain | |
cid | integer | | | | plain | |
dlevel | integer | | not null | | plain | |
dauthor | name | | | | plain | |
dtitle | text | | | | extended | |
Partition key: RANGE (cid)
Policies:
POLICY "pp1"
USING ((dlevel <= ( SELECT uaccount.seclv
FROM uaccount
WHERE (uaccount.pguser = CURRENT_USER))))
POLICY "pp1r" AS RESTRICTIVE
TO regress_rls_dave
USING ((cid < 55))
Partitions: part_document_fiction FOR VALUES FROM (11) TO (12),
part_document_nonfiction FOR VALUES FROM (99) TO (100),
part_document_satire FOR VALUES FROM (55) TO (56)
SELECT * FROM pg_policies WHERE schemaname = 'regress_rls_schema' AND tablename like '%part_document%' ORDER BY policyname;
schemaname | tablename | policyname | permissive | roles | cmd | qual | with_check
--------------------+---------------+------------+-------------+--------------------+-----+--------------------------------------------+------------
regress_rls_schema | part_document | pp1 | PERMISSIVE | {public} | ALL | (dlevel <= ( SELECT uaccount.seclv +|
| | | | | | FROM uaccount +|
| | | | | | WHERE (uaccount.pguser = CURRENT_USER))) |
regress_rls_schema | part_document | pp1r | RESTRICTIVE | {regress_rls_dave} | ALL | (cid < 55) |
(2 rows)
-- viewpoint from regress_rls_bob
SET SESSION AUTHORIZATION regress_rls_bob;
SET row_security TO ON;
SELECT * FROM part_document WHERE f_leak(dtitle) ORDER BY did;
NOTICE: f_leak => my first novel
NOTICE: f_leak => great science fiction
NOTICE: f_leak => awesome science fiction
NOTICE: f_leak => my first satire
did | cid | dlevel | dauthor | dtitle
-----+-----+--------+-------------------+-------------------------
1 | 11 | 1 | regress_rls_bob | my first novel
4 | 55 | 1 | regress_rls_bob | my first satire
6 | 11 | 1 | regress_rls_carol | great science fiction
9 | 11 | 1 | regress_rls_dave | awesome science fiction
(4 rows)
EXPLAIN (COSTS OFF) SELECT * FROM part_document WHERE f_leak(dtitle);
QUERY PLAN
-----------------------------------------------------
Append
InitPlan 1 (returns $0)
-> Index Scan using uaccount_pkey on uaccount
Index Cond: (pguser = CURRENT_USER)
-> Seq Scan on part_document_fiction
Filter: ((dlevel <= $0) AND f_leak(dtitle))
-> Seq Scan on part_document_satire
Filter: ((dlevel <= $0) AND f_leak(dtitle))
-> Seq Scan on part_document_nonfiction
Filter: ((dlevel <= $0) AND f_leak(dtitle))
(10 rows)