psql set superuser code example
Example 1: postgresql change user role grant
=# ALTER USER librarian WITH SUPERUSER;
ALTER ROLEExample 2: postgresql change user role grant
=# ALTER USER role_specification WITH OPTION1 OPTION2 OPTION3;=# ALTER USER librarian WITH SUPERUSER;
ALTER ROLE=# ALTER USER role_specification WITH OPTION1 OPTION2 OPTION3;