Обсуждение: pgsql: Enforce ALL/SELECT policies in RETURNING for RLS

Enforce ALL/SELECT policies in RETURNING for RLS

For the UPDATE/DELETE RETURNING case, filter the records which are not
visible to the user through ALL or SELECT policies from those considered
for the UPDATE or DELETE.  This is similar to how the GRANT system
works, which prevents RETURNING unless the caller has SELECT rights on
the relation.

Per discussion with Robert, Dean, Tom, and Kevin.

Back-patch to 9.5 where RLS was introduced.

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/4f3b2a8883c47b6710152a8e157f8a02656d0e68

Modified Files
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src/backend/rewrite/rowsecurity.c         |   47 +++++++++++++++++++++++++++
src/test/regress/expected/rowsecurity.out |   50 ++++++++++++++++-------------
2 files changed, 74 insertions(+), 23 deletions(-)