del

tests_config.py

@@ -507,4 +507,6 @@ sql_checker_tests = [
         'column `count` not exists in `class`',
     ),
     ("select age, class.grade from class, person;", True),
+    ("select age, person.grade from class, person;", 'column `person.grade` not exists in `class, person`'),
+
 ]