Class B

test/orm/test_deferred.py:2203–2210

            my_expr = query_expression(default_expr=literal(15))

        class B(ComparableEntity, Base):
            __tablename__ = "b"
            id = Column(Integer, primary_key=True)
            a_id = Column(ForeignKey("a.id"))
            p = Column(Integer)
            q = Column(Integer)

            b_expr = query_expression()

        class C(ComparableEntity, Base):
            __tablename__ = "c"