PostgreSQL继承：父表触发器是继承的吗？

如果我在CANInes表上有一个更新前触发器,它将timestamp列设置为Now(),并且DOGS继承自CANInes,当更新DOGS行时,是否应该触发CANInes更新触发器？在我的测试中没有,所以我怀疑答案是否定的,但也许我没有做正确的事情：

create table canines
(
lastupdate timestamp with time zone default Now()
);

CREATE OR REPLACE FUNCTION stamp_lastupdate_column()
    RETURNS TRIGGER AS $$
    BEGIN
       NEW.lastupdate = Now(); 
       RETURN NEW;
    END;
    $$language 'plpgsql';


CREATE TRIGGER TRG_CANInes_BU BEFORE UPDATE
        on CANInes FOR EACH ROW EXECUTE PROCEDURE 
        stamp_lastupdate_column();


create table dogs
(id int primary key,breed varchar(25)
) inherits (CANInes);

insert into dogs(id,breed) values(1,'sheltie');  

select * from dogs;
--"2013-02-09 06:49:31.669-05",1,sheltie

update dogs set breed = 'Sheltie/Shetland Sheepdog' where id = 1;

select * from dogs;
--"2013-02-09 06:49:31.669-05",Sheltie/Shetland Sheepdog

长话短说 – 不,它不是遗传的.可以选择CREATE TABLE – LIKE … INCLUDING …,但它也不会传播触发器.