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document postgresql permissions under Amazon RDS #3460

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document postgresql permissions under Amazon RDS #3460

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16 changes: 16 additions & 0 deletions docs/graphql/manual/deployment/postgres-permissions.rst
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Expand Up @@ -65,3 +65,19 @@ Here's a sample SQL block that you can run on your database to create the right
-- GRANT USAGE ON SCHEMA <schema-name> TO hasurauser;
-- GRANT ALL ON ALL TABLES IN SCHEMA <schema-name> TO hasurauser;
-- GRANT ALL ON ALL SEQUENCES IN SCHEMA <schema-name> TO hasurauser;

Note that some managed database environments may limit your ability to do this. Notably, Amazon's RDS service features a database “master” user that is not a superuser at all, and cannot grant access to all tables in certain schemas. With PostgreSQL 10 under RDS, this affects both ``information_schema`` and ``pg_catalog``; with PostgreSQL 11, only ``pg_catalog``. One workaround is to grant access to only the tables and views that Hasura needs access to. For example, with PostgreSQL 11:

.. code-block:: sql

-- instead of "GRANT SELECT ON ALL TABLES IN SCHEMA pg_catalog ..."
GRANT SELECT ON
pg_catalog.pg_constraint,
pg_catalog.pg_class,
pg_catalog.pg_namespace,
pg_catalog.pg_attribute,
pg_catalog.pg_proc,
pg_catalog.pg_available_extensions,
pg_catalog.pg_statio_all_tables,
pg_catalog.pg_description
TO hasurauser;