CREATE POLICY and RETURNING

Hi,

While I was checking the behavior of RLS, I found that the policy for SELECT
doesn't seem to be applied to RETURNING. Is this intentional? Please see
the following example.

CREATE ROLE foo LOGIN NOSUPERUSER;
CREATE TABLE hoge AS SELECT col FROM generate_series(1,10) col;
ALTER TABLE hoge ENABLE ROW LEVEL SECURITY;
GRANT SELECT, DELETE ON hoge TO foo;
CREATE POLICY hoge_select_policy ON hoge FOR SELECT TO foo USING (col < 4);
CREATE POLICY hoge_delete_policy ON hoge FOR DELETE TO foo USING (col < 8);
\c - foo
DELETE FROM hoge WHERE col = 6 RETURNING *;

The policy "hoge_select_policy" should disallow the user "foo" to see the row
with "col = 6". But the last DELETE RETURNING returns that row.

One minor suggestion is: what about changing the message as follows?
There are two more similar messages in policy.c, and they use the word
"row-policy" instead of "policy". For the consistency, I think that
the following also should use the word "row-policy".

diff --git a/src/backend/commands/policy.c b/src/backend/commands/policy.c
index 3627539..df45385 100644
--- a/src/backend/commands/policy.c
+++ b/src/backend/commands/policy.c
@@ -551,7 +551,7 @@ CreatePolicy(CreatePolicyStmt *stmt)
if (HeapTupleIsValid(rsec_tuple))
ereport(ERROR,
(errcode(ERRCODE_DUPLICATE_OBJECT),
- errmsg("policy \"%s\" for relation
\"%s\" already exists",
+ errmsg("row-policy \"%s\" for
relation \"%s\" already exists",

Regards,

--
Fujii Masao