小编Rad*_*tak的帖子

我有功能检查强制参与如下:

CREATE FUNCTION member_in_has_address()
RETURNS BOOLEAN AS $$
BEGIN
RETURN EXISTS (SELECT *
       FROM address a, member_details b
       WHERE b.member_id = a.member_id);
END;
$$  LANGUAGE plpgsql;

然后从CHECK约束调用

ALTER TABLE member_details
 ADD CONSTRAINT member_in_has_address_check
  CHECK (member_in_has_address());

要在标准SQL中创建deferred约束,它将是:

ALTER TABLE member_details
 ADD CONSTRAINT member_in_has_address_check
  INITIALLY DEFERRED
  CHECK (member_in_has_address()); 

我怎么能在PostgreSQL中做同样的事情？