|PostgreSQL manages users privileges thorough roles, and this is managed by a privilege system, where users are granted different privileges for the tables, schemas, functions or other database objects.|
|An object, since it's creation belongs to an owner, this owner will
grant other roles to use it.
There are different kinds of privileges: SELECT, INSERT, UPDATE, DELETE, TRUNCATE, REFERENCES, TRIGGER, CREATE, CONNECT, TEMPORARY, EXECUTE, and USAGE.
|Security options: role , user,
To create new users, you must either be a superuser or have the createrole or createuser privilege.
Super-Users: is an account created during a new
installation. The password is setup during the initial installation of
the database server, and may be changed at any point in the future using
pgAdminIII, or by issuing an SQL query such as:
A privilege is a right to execute a particular type of SQL statement or to access another user's object. An user is granted a role which is decided by a super user like "postgres".
Version 9.0 added a capability to GRANT or REVOKE privileges on all
objects of a certain
The user by default "porstgres" is a superuser.
The user created, "manas237",was other roles as shown below.
However, the user "manas237' was not a superuser.
Superuser, be default govern tablespaces.
In Unix OS: