# Tests for sys schema
# Verify the sys.ps_thread_account() function perfoms as expected

# Passing NULL, or an unknown connection id, should return NULL
SELECT sys.ps_thread_account(NULL);
SELECT sys.ps_thread_account(234623462376);

-- error 1264
SELECT sys.ps_thread_account(-1);

# Check result
SELECT sys.ps_thread_account(sys.ps_thread_id(NULL));