@classmethod
def define_tables(cls, metadata):
    Table('foo', metadata, Column('id', Integer, Sequence('t_id_seq'), primary_key=True), Column('data', String(50)), Column('x', Integer))
@classmethod
def define_tables(cls, metadata):
    Table('foo', metadata, Column('id', Integer, Sequence('t_id_seq'), primary_key=True), Column('data', String(50)), Column('x', Integer))