How to check role of current PostgreSQL user from Qt application?

Question

I have some application based on Qt library and using QPSQL driver.
In PostreSQL defined a few user roles (e.g: admin, operator, user). My application creates a connect

Answer 1

You can check PostgreSQL user permissions with this query:

SELECT * FROM pg_roles;

Answer 2

The manual:

SELECT current_user;  -- user name of current execution context
SELECT session_user;  -- session user name

Meaning, session_user shows the role you connected with, and current_user shows the role you are currently operating with, for instance after calling SET role some_other_role;.