ClickHouse/dbms/tests/queries/0_stateless/00990_function_current_user.sql

-- since actual user name is unknown, have to perform just smoke tests
select currentUser() IS NOT NULL;
select length(currentUser()) > 0;
select currentUser() = user(), currentUser() = USER();
select currentUser() = initial_user from system.processes where query like '%$!@#%';