A <class 'sqlparse.sql.Identifier'> , <class 'sqlparse.sql.Token'> <class 'sqlparse.sql.Token'> ROLE <class 'sqlparse.sql.Token'> ROLE <class 'sqlparse.sql.Token'> , <class 'sqlparse.sql.Token'> <class 'sqlparse.sql.Token'> B <class 'sqlparse.sql.Identifier'> role is also a field name.