I'm trying to write a function that eventually will rotate users. Currently I have the code below which works and creates a new user using the prior user which ultimately has the same rights as the master user, ie, can do everything.
select mysch.dblink('dbname=mydb user=themasteruser password=abc123 connect_timeout=200000 host=localhost', 'CREATE USER newuname WITH PASSWORD ''pass1'' CREATEDB CREATEROLE;GRANT rds_superuser TO newuname;'); DROP SERVER IF EXISTS fs_link_b CASCADE; CREATE SERVER fs_link_b FOREIGN DATA WRAPPER postgres_fdw OPTIONS (host 'localhost', port '5432', dbname 'mydb ', connect_timeout '200000'); CREATE USER MAPPING FOR newuname SERVER fs_link_b OPTIONS ("user" 'newuname',password 'pass1'); ALTER SERVER fs_link_b OWNER TO newuname;
However, when I make a connection with the above created user and I try to run the query below:
select * from mysch.dblink('link_b', 'select usename from PG_USER limit 1;') as t(uu text);
I get this error:
SQL Error : ERROR: permission denied for schema mysch
If I created the user based on a master user, then should it not have all rights as the master user as created above? Or Do I need to do a bunch of individual GRANTS still?