Re: DROP ROLE blocked by pg_init_privs - Mailing list pgsql-general

Hi,

Thank you for replying. Great to know about pg_read_all_data, will have a look at that. 

Re: it works, not sure, can't make it work on my side. Here's a full repro:

[nix-shell:~]$ docker run --rm -ti -p 5555:5432 -e POSTGRES_PASSWORD=pg_test_init_privs --name pg_test_init_privs -d postgres:16.9
ae9fe66613867d4db6019bbc0806ef57b5bf7e8b83b10ee0dbb422c2d146d701

[nix-shell:~]$ psql postgres://postgres:pg_test_init_privs@localhost:5555 <<EOF
CREATE ROLE test_role;
GRANT SELECT ON ALL TABLES IN SCHEMA public TO test_role;
ALTER DEFAULT PRIVILEGES IN SCHEMA public GRANT SELECT ON TABLES TO test_role;
CREATE EXTENSION pg_stat_statements;
DROP ROLE test_role;
EOF

CREATE ROLE
GRANT
ALTER DEFAULT PRIVILEGES
CREATE EXTENSION
ERROR:  role "test_role" cannot be dropped because some objects depend on it
DETAIL:  privileges for default privileges on new relations belonging to role postgres in schema public
privileges for view pg_stat_statements_info
privileges for view pg_stat_statements

Is there some difference in the configuration that I'm not accounting for?

Thanks

On Tue, Nov 25, 2025 at 11:49 PM Pavel Luzanov <p.luzanov@postgrespro.ru> wrote:

Hi

On 24.11.2025 18:59, immerrr again wrote:

First time trying to configure a PG cluster by the book, I want to create a
role with read permissions on all current and future tables in the current
db. It looks smth like this

CREATE ROLE test_role;
GRANT SELECT ON ALL TABLES IN SCHEMA public TO test_role;
ALTER DEFAULT PRIVILEGES IN SCHEMA public GRANT SELECT ON TABLES TO test_role;

I've been trying out different scenarios for the future, and currently having
a problem when trying to remove "test_role" after adding an extension.

Hm, I have checked your example, it works as expected:

postgres@postgres(16.9)=# CREATE ROLE test_role;
CREATE ROLE
postgres@postgres(16.9)=# GRANT SELECT ON ALL TABLES IN SCHEMA public TO test_role;
GRANT
postgres@postgres(16.9)=# ALTER DEFAULT PRIVILEGES IN SCHEMA public GRANT SELECT ON TABLES TO test_role;
ALTER DEFAULT PRIVILEGES
postgres@postgres(16.9)=# CREATE EXTENSION pg_stat_statements;
CREATE EXTENSION

postgres@postgres(16.9)=# REVOKE SELECT ON ALL TABLES IN SCHEMA public FROM test_role;
REVOKE
postgres@postgres(16.9)=# ALTER DEFAULT PRIVILEGES IN SCHEMA public REVOKE SELECT ON TABLES FROM test_role;
ALTER DEFAULT PRIVILEGES
postgres@postgres(16.9)=# DROP ROLE test_role;
DROP ROLE
postgres@postgres(16.9)=# DROP EXTENSION pg_stat_statements;
DROP EXTENSION

In any case, since v14 you can use the predefined role pg_read_all_data.

-- 
Pavel Luzanov
Postgres Professional: https://postgrespro.com