I'm trying to create a user with read-only permission in Postgres on AWS.
CREATE USER readonly_username WITH PASSWORD 'password';
GRANT USAGE ON SCHEMA public to readonly_username;
ALTER DEFAULT PRIVILEGES IN SCHEMA public GRANT SELECT ON TABLES TO readonly_username;
After that i gave SELECT permission new tables:
ALTER DEFAULT PRIVILEGES IN SCHEMA public GRANT SELECT ON TABLES TO readonly_username;
But when i try to give permission to existing tables i got an error:
GRANT SELECT ON ALL TABLES IN SCHEMA public TO readonly_username;
ERROR: permission denied for relation admin_log
Can anyone help me?
Related
I am running this command
gcloud sql import sql db1 gs://mybucket/sqldumpfile.gz --database=mydb1
to import a database snapshot into a new database. Before running it, I recreated the same users I had in the source database, using Cloud Console. However, I keep on getting this error:
ERROR: must be member of role "postgres"
STATEMENT: ALTER DEFAULT PRIVILEGES FOR ROLE postgres IN SCHEMA public GRANT SELECT ON TABLES TO user1;
I am not sure what to do and which user must be "member of role postgres".
Any advice is appreciated
To grant default privileges for user2, use the FOR ROLE clause:
ALTER DEFAULT PRIVILEGES FOR USER <user-1> IN SCHEMA <user-1> GRANT INSERT, UPDATE, DELETE ON TABLES TO <user-2>;
ALTER DEFAULT PRIVILEGES FOR USER <user-1> IN SCHEMA <user-1> GRANT SELECT ON TABLES TO <user-2>;
You need to grant the rights from the user-1 which is creating the table, So whenever the user-1 creates a table, it will grant the SELECT rights for the user-2.
For more information refer to this document.
I am struggling with dropping a ready only user I created on one of the database in the cluster. I created a read only user using following script:
CREATE USER is_user_readonly WITH ENCRYPTED PASSWORD 'test1';
GRANT CONNECT ON DATABASE db1 to is_user_readonly;
GRANT USAGE ON SCHEMA public to is_user_readonly;
GRANT SELECT ON ALL SEQUENCES IN SCHEMA public TO is_user_readonly;
GRANT SELECT ON ALL TABLES IN SCHEMA public TO is_user_readonly;
ALTER DEFAULT PRIVILEGES IN SCHEMA public GRANT SELECT ON TABLES TO is_user_readonly;
I logged in database db1 and created this user is_user_readonly. I logged in as admin. This user is created on all databases in the cluster.
Now, for dropping this user, I logged in db1 as admin and ran below scripts:
REVOKE ALL PRIVILEGES ON DATABASE db1 FROM is_user_readonly;
REVOKE ALL PRIVILEGES ON SCHEMA public FROM is_user_readonly;
REVOKE ALL PRIVILEGES ON ALL TABLES IN SCHEMA public FROM is_user_readonly;
REVOKE ALL PRIVILEGES ON ALL SEQUENCES IN SCHEMA public FROM is_user_readonly;
REVOKE USAGE ON SCHEMA public FROM is_user_readonly;
REVOKE CONNECT ON DATABASE db1 FROM is_user_readonly;
At this point I am really pulling out my hair that there is still some dependency.
SQL Error [2BP01]: ERROR: role "is_user_readonly" cannot be dropped because some objects depend on it
Detail: privileges for default privileges on new relations belonging to role isadmin in schema public
ERROR: role "is_user_readonly" cannot be dropped because some objects depend on it
Detail: privileges for default privileges on new relations belonging to role isadmin in schema public
ERROR: role "is_user_readonly" cannot be dropped because some objects depend on it
Detail: privileges for default privileges on new relations belonging to role isadmin in schema public.
Do I need to run the revoke script on all database in this cluster?
Any help is highly appreciated.
Revoke the default privileges:
ALTER DEFAULT PRIVILEGES FOR ROLE whatever IN SCHEMA public
REVOKE SELECT ON TABLES FROM is_user_readonly;
The role whatever here is the user you were logged in as when you ran the ALTER DEFAULT PRIVILEGES statement.
I want to create a Postgres user that has just read-only access to the database.
I saw a similar question, but it had no resolution for my error.
I even tried searching for the error but didn't find anything useful.
Syntax:
GRANT CONNECT ON DATABASE YourDatabaseName TO Read_Only_User;
GRANT USAGE ON SCHEMA public TO Read_Only_User;
GRANT SELECT ON ALL TABLES IN SCHEMA public TO Read_Only_User;
GRANT SELECT ON ALL SEQUENCES IN SCHEMA public TO Read_Only_User;
# You can either grant USAGE to everyone
GRANT USAGE ON SCHEMA public TO public;
# Or grant it just to your read only user
GRANT USAGE ON SCHEMA public TO readonlyuser;
But none worked. I logged in as a root user.
I many times ended with the error
ERROR: permission denied for relation querystoresearchclient
Could anyone help here?
I am aware that similar questions have been asked before, but the answers do not appear to solve my problem, so I think a more complete answer would be valuable.
I would like to create a read-only user for a postgresql database. I have already granted access to the server for my user using the pg_hba.conf file.
As the postgres admin user, I have run the following commands:
CREATE ROLE read_only_user NOSUPERUSER INHERIT NOCREATEDB NOCREATEROLE NOREPLICATION;
GRANT CONNECT ON DATABASE the_database TO read_only_user;
GRANT USAGE ON SCHEMA public to read_only_user;
GRANT SELECT ON ALL TABLES IN SCHEMA public TO read_only_user;
GRANT SELECT ON ALL SEQUENCES IN SCHEMA public TO read_only_user;
ALTER DEFAULT PRIVILEGES IN SCHEMA public GRANT SELECT ON TABLES TO read_only_user;
ALTER ROLE read_only_user WITH PASSWORD '*********************';
ALTER ROLE read_only_user VALID UNTIL 'infinity';
ALTER ROLE read_only_user WITH LOGIN;
ALTER USER read_only_user SET search_path = public;
As a result, I am able to log in to the the_database DB locally, and remotely using a DB client, with username and password authentication and I can list the tables in the database. However, any attempt to select or view the contents of the database results in
ERROR: permission denied for relation the_table
What other permissions are needed, since as far as I can tell, all the necessary permissions are granted.
I have a view called testview in postgresql.
I created a new user called testuser.
I would like testuser to have all privileges on all tables and views in the database.
To do this I ran the following commands:
GRANT ALL PRIVILEGES ON DATABASE testdb TO testuser;
GRANT USAGE ON SCHEMA public TO testuser;
GRANT ALL PRIVILEGES ON ALL TABLES IN SCHEMA public TO testuser;
testuser now has access to all tables in the database, but if I try to run SELECT * FROM testview I get the following error: permission denied for relation testview.
What is wrong? How do testuser get access to testview?
I agree it should work. With permissions GRANT ... ON ALL TABLES should include views too.
Did you create the view after granting the privileges to testuser? If so then it doesn't have the same privileges as the other tables. That's because GRANT ... ON ALL TABLES means "on all tables that currently exist". To include tables/views you create in the future, you can say:
ALTER DEFAULT PRIVILEGES IN SCHEMA public GRANT SELECT ON TABLES TO testuser;
Or if you want to give more than SELECT, you can say ALL PRIVILEGES instead.
I think this behavior of ON ALL TABLES is one of the most misunderstood bits about Postgres permissions, and it isn't really called out in the standard documentation, so I tried to emphasize it in my own Postgres permissions overview.
postgres=# GRANT ALL PRIVILEGES ON DATABASE testdb TO testuser;
postgres=# GRANT ALL PRIVILEGES ON ALL TABLES IN SCHEMA public TO testuser;
GRANT USAGE on schema:
GRANT USAGE ON SCHEMA schema_name TO username;
Grant SELECT for a specific table:
GRANT SELECT ON tbl_loans_new TO oloffm;
Grant SELECT for multiple tables:
GRANT SELECT ON ALL TABLES IN SCHEMA schema_name TO username;