return conOid;
}
+/*
+ * get_relation_constraint_attnos
+ * Find a constraint on the specified relation with the specified name
+ * and return the constrained columns.
+ *
+ * Returns a Bitmapset of the column attnos of the constrained columns, with
+ * attnos being offset by FirstLowInvalidHeapAttributeNumber so that system
+ * columns can be represented.
+ *
+ * *constraintOid is set to the OID of the constraint, or InvalidOid on
+ * failure.
+ */
+Bitmapset *
+get_relation_constraint_attnos(Oid relid, const char *conname,
+ bool missing_ok, Oid *constraintOid)
+{
+ Bitmapset *conattnos = NULL;
+ Relation pg_constraint;
+ HeapTuple tuple;
+ SysScanDesc scan;
+ ScanKeyData skey[1];
+
+ /* Set *constraintOid, to avoid complaints about uninitialized vars */
+ *constraintOid = InvalidOid;
+
+ /*
+ * Fetch the constraint tuple from pg_constraint. There may be more than
+ * one match, because constraints are not required to have unique names;
+ * if so, error out.
+ */
+ pg_constraint = heap_open(ConstraintRelationId, AccessShareLock);
+
+ ScanKeyInit(&skey[0],
+ Anum_pg_constraint_conrelid,
+ BTEqualStrategyNumber, F_OIDEQ,
+ ObjectIdGetDatum(relid));
+
+ scan = systable_beginscan(pg_constraint, ConstraintRelidIndexId, true,
+ NULL, 1, skey);
+
+ while (HeapTupleIsValid(tuple = systable_getnext(scan)))
+ {
+ Form_pg_constraint con = (Form_pg_constraint) GETSTRUCT(tuple);
+ Datum adatum;
+ bool isNull;
+ ArrayType *arr;
+ int16 *attnums;
+ int numcols;
+ int i;
+
+ /* Check the constraint name */
+ if (strcmp(NameStr(con->conname), conname) != 0)
+ continue;
+ if (OidIsValid(*constraintOid))
+ ereport(ERROR,
+ (errcode(ERRCODE_DUPLICATE_OBJECT),
+ errmsg("table \"%s\" has multiple constraints named \"%s\"",
+ get_rel_name(relid), conname)));
+
+ *constraintOid = HeapTupleGetOid(tuple);
+
+ /* Extract the conkey array, ie, attnums of constrained columns */
+ adatum = heap_getattr(tuple, Anum_pg_constraint_conkey,
+ RelationGetDescr(pg_constraint), &isNull);
+ if (isNull)
+ continue; /* no constrained columns */
+
+ arr = DatumGetArrayTypeP(adatum); /* ensure not toasted */
+ numcols = ARR_DIMS(arr)[0];
+ if (ARR_NDIM(arr) != 1 ||
+ numcols < 0 ||
+ ARR_HASNULL(arr) ||
+ ARR_ELEMTYPE(arr) != INT2OID)
+ elog(ERROR, "conkey is not a 1-D smallint array");
+ attnums = (int16 *) ARR_DATA_PTR(arr);
+
+ /* Construct the result value */
+ for (i = 0; i < numcols; i++)
+ {
+ conattnos = bms_add_member(conattnos,
+ attnums[i] - FirstLowInvalidHeapAttributeNumber);
+ }
+ }
+
+ systable_endscan(scan);
+
+ /* If no such constraint exists, complain */
+ if (!OidIsValid(*constraintOid) && !missing_ok)
+ ereport(ERROR,
+ (errcode(ERRCODE_UNDEFINED_OBJECT),
+ errmsg("constraint \"%s\" for table \"%s\" does not exist",
+ conname, get_rel_name(relid))));
+
+ heap_close(pg_constraint, AccessShareLock);
+
+ return conattnos;
+}
+
/*
* get_domain_constraint_oid
* Find a constraint on the specified domain with the specified name.
pstate->p_namespace = save_namespace;
+ /*
+ * If the arbiter is specified by constraint name, get the constraint
+ * OID and mark the constrained columns as requiring SELECT privilege,
+ * in the same way as would have happened if the arbiter had been
+ * specified by explicit reference to the constraint's index columns.
+ */
if (infer->conname)
- *constraint = get_relation_constraint_oid(RelationGetRelid(pstate->p_target_relation),
- infer->conname, false);
+ {
+ Oid relid = RelationGetRelid(pstate->p_target_relation);
+ RangeTblEntry *rte = pstate->p_target_rangetblentry;
+ Bitmapset *conattnos;
+
+ conattnos = get_relation_constraint_attnos(relid, infer->conname,
+ false, constraint);
+
+ /* Make sure the rel as a whole is marked for SELECT access */
+ rte->requiredPerms |= ACL_SELECT;
+ /* Mark the constrained columns as requiring SELECT access */
+ rte->selectedCols = bms_add_members(rte->selectedCols, conattnos);
+ }
}
/*
{
List *conflict_permissive_policies;
List *conflict_restrictive_policies;
+ List *conflict_select_permissive_policies = NIL;
+ List *conflict_select_restrictive_policies = NIL;
/* Get the policies that apply to the auxiliary UPDATE */
get_policies_for_relation(rel, CMD_UPDATE, user_id,
*/
if (rte->requiredPerms & ACL_SELECT)
{
- List *conflict_select_permissive_policies = NIL;
- List *conflict_select_restrictive_policies = NIL;
-
get_policies_for_relation(rel, CMD_SELECT, user_id,
&conflict_select_permissive_policies,
&conflict_select_restrictive_policies);
withCheckOptions,
hasSubLinks,
false);
+
+ /*
+ * Add ALL/SELECT policies as WCO_RLS_UPDATE_CHECK WCOs, to ensure
+ * that the final updated row is visible when taking the UPDATE
+ * path of an INSERT .. ON CONFLICT DO UPDATE, if SELECT rights
+ * are required for this relation.
+ */
+ if (rte->requiredPerms & ACL_SELECT)
+ add_with_check_options(rel, rt_index,
+ WCO_RLS_UPDATE_CHECK,
+ conflict_select_permissive_policies,
+ conflict_select_restrictive_policies,
+ withCheckOptions,
+ hasSubLinks,
+ true);
}
}
extern void AlterConstraintNamespaces(Oid ownerId, Oid oldNspId,
Oid newNspId, bool isType, ObjectAddresses *objsMoved);
extern Oid get_relation_constraint_oid(Oid relid, const char *conname, bool missing_ok);
+extern Bitmapset *get_relation_constraint_attnos(Oid relid, const char *conname,
+ bool missing_ok, Oid *constraintOid);
extern Oid get_domain_constraint_oid(Oid typid, const char *conname, bool missing_ok);
extern Bitmapset *get_primary_key_attnos(Oid relid, bool deferrableOk,
INSERT INTO atest5(three) VALUES (4) ON CONFLICT (two) DO UPDATE set three = 10; -- fails (due to INSERT)
ERROR: permission denied for relation atest5
-- Check that the columns in the inference require select privileges
--- Error. No privs on four
-INSERT INTO atest5(three) VALUES (4) ON CONFLICT (four) DO UPDATE set three = 10;
+INSERT INTO atest5(four) VALUES (4); -- fail
ERROR: permission denied for relation atest5
SET SESSION AUTHORIZATION regress_user1;
+GRANT INSERT (four) ON atest5 TO regress_user4;
+SET SESSION AUTHORIZATION regress_user4;
+INSERT INTO atest5(four) VALUES (4) ON CONFLICT (four) DO UPDATE set three = 3; -- fails (due to SELECT)
+ERROR: permission denied for relation atest5
+INSERT INTO atest5(four) VALUES (4) ON CONFLICT ON CONSTRAINT atest5_four_key DO UPDATE set three = 3; -- fails (due to SELECT)
+ERROR: permission denied for relation atest5
+INSERT INTO atest5(four) VALUES (4); -- ok
+SET SESSION AUTHORIZATION regress_user1;
+GRANT SELECT (four) ON atest5 TO regress_user4;
+SET SESSION AUTHORIZATION regress_user4;
+INSERT INTO atest5(four) VALUES (4) ON CONFLICT (four) DO UPDATE set three = 3; -- ok
+INSERT INTO atest5(four) VALUES (4) ON CONFLICT ON CONSTRAINT atest5_four_key DO UPDATE set three = 3; -- ok
+SET SESSION AUTHORIZATION regress_user1;
REVOKE ALL (one) ON atest5 FROM regress_user4;
GRANT SELECT (one,two,blue) ON atest6 TO regress_user4;
SET SESSION AUTHORIZATION regress_user4;
--
SET SESSION AUTHORIZATION regress_rls_alice;
SET row_security = on;
-CREATE TABLE r1 (a int);
+CREATE TABLE r1 (a int PRIMARY KEY);
CREATE POLICY p1 ON r1 FOR SELECT USING (a < 20);
CREATE POLICY p2 ON r1 FOR UPDATE USING (a < 20) WITH CHECK (true);
+CREATE POLICY p3 ON r1 FOR INSERT WITH CHECK (true);
INSERT INTO r1 VALUES (10);
ALTER TABLE r1 ENABLE ROW LEVEL SECURITY;
ALTER TABLE r1 FORCE ROW LEVEL SECURITY;
-- Error
UPDATE r1 SET a = 30 RETURNING *;
ERROR: new row violates row-level security policy for table "r1"
+-- UPDATE path of INSERT ... ON CONFLICT DO UPDATE should also error out
+INSERT INTO r1 VALUES (10)
+ ON CONFLICT (a) DO UPDATE SET a = 30 RETURNING *;
+ERROR: new row violates row-level security policy for table "r1"
+-- Should still error out without RETURNING (use of arbiter always requires
+-- SELECT permissions)
+INSERT INTO r1 VALUES (10)
+ ON CONFLICT (a) DO UPDATE SET a = 30;
+ERROR: new row violates row-level security policy for table "r1"
+INSERT INTO r1 VALUES (10)
+ ON CONFLICT ON CONSTRAINT r1_pkey DO UPDATE SET a = 30;
+ERROR: new row violates row-level security policy for table "r1"
DROP TABLE r1;
-- Check dependency handling
RESET SESSION AUTHORIZATION;
INSERT INTO atest5(two) VALUES (6) ON CONFLICT (two) DO UPDATE set three = EXCLUDED.three;
INSERT INTO atest5(two) VALUES (6) ON CONFLICT (two) DO UPDATE set one = 8; -- fails (due to UPDATE)
INSERT INTO atest5(three) VALUES (4) ON CONFLICT (two) DO UPDATE set three = 10; -- fails (due to INSERT)
+
-- Check that the columns in the inference require select privileges
--- Error. No privs on four
-INSERT INTO atest5(three) VALUES (4) ON CONFLICT (four) DO UPDATE set three = 10;
+INSERT INTO atest5(four) VALUES (4); -- fail
+
+SET SESSION AUTHORIZATION regress_user1;
+GRANT INSERT (four) ON atest5 TO regress_user4;
+SET SESSION AUTHORIZATION regress_user4;
+
+INSERT INTO atest5(four) VALUES (4) ON CONFLICT (four) DO UPDATE set three = 3; -- fails (due to SELECT)
+INSERT INTO atest5(four) VALUES (4) ON CONFLICT ON CONSTRAINT atest5_four_key DO UPDATE set three = 3; -- fails (due to SELECT)
+INSERT INTO atest5(four) VALUES (4); -- ok
+
+SET SESSION AUTHORIZATION regress_user1;
+GRANT SELECT (four) ON atest5 TO regress_user4;
+SET SESSION AUTHORIZATION regress_user4;
+
+INSERT INTO atest5(four) VALUES (4) ON CONFLICT (four) DO UPDATE set three = 3; -- ok
+INSERT INTO atest5(four) VALUES (4) ON CONFLICT ON CONSTRAINT atest5_four_key DO UPDATE set three = 3; -- ok
SET SESSION AUTHORIZATION regress_user1;
REVOKE ALL (one) ON atest5 FROM regress_user4;
--
SET SESSION AUTHORIZATION regress_rls_alice;
SET row_security = on;
-CREATE TABLE r1 (a int);
+CREATE TABLE r1 (a int PRIMARY KEY);
CREATE POLICY p1 ON r1 FOR SELECT USING (a < 20);
CREATE POLICY p2 ON r1 FOR UPDATE USING (a < 20) WITH CHECK (true);
+CREATE POLICY p3 ON r1 FOR INSERT WITH CHECK (true);
INSERT INTO r1 VALUES (10);
ALTER TABLE r1 ENABLE ROW LEVEL SECURITY;
ALTER TABLE r1 FORCE ROW LEVEL SECURITY;
-- Error
UPDATE r1 SET a = 30 RETURNING *;
+-- UPDATE path of INSERT ... ON CONFLICT DO UPDATE should also error out
+INSERT INTO r1 VALUES (10)
+ ON CONFLICT (a) DO UPDATE SET a = 30 RETURNING *;
+
+-- Should still error out without RETURNING (use of arbiter always requires
+-- SELECT permissions)
+INSERT INTO r1 VALUES (10)
+ ON CONFLICT (a) DO UPDATE SET a = 30;
+INSERT INTO r1 VALUES (10)
+ ON CONFLICT ON CONSTRAINT r1_pkey DO UPDATE SET a = 30;
+
DROP TABLE r1;
-- Check dependency handling
projects / postgresql / commitdiff