Re: UPDATING and DELETING sub-classes

Поиск
Список
Период
Сортировка
От ChristophSchmidt
Тема Re: UPDATING and DELETING sub-classes
Дата
Msg-id 00070707063001.00445@nasen2
обсуждение исходный текст
Ответ на UPDATING and DELETING sub-classes  (Ami Ganguli <ami@ganguli.com>)
Список pgsql-novice
I think you get only the structure of parent in child, nothing more.
parent :    a      - one column
child   :    a | b  - two column
you have two tables  the only benefit of inheritation in this case
is that you have to write less code.
Something similar to Domains.

(I am right ?)
cs

> I've tried posting this to pgsql-bugs with no response, so I thought I'd try
> here (in case there's something silly I'm doing wrong).
>
> I'm trying to use the DELETE and UPDATE commands to update both the parent
> class (which is specfied in the query) and the sub-classes.  According to the
> documentation the default behaviour is to include sub-classes and that's
> exactly what I want.  Unfortunately it doesn't work:
>
> If I do this:
>
> create table parent ( a int );
> create table child ( b int ) inherits (parent);
> insert into child values ( 1, 2 );
> update parent set a=3 where a=1;
>
> The update does nothing.  I would expect it to update the record in the child
> table.
>
> What am I doing wrong?  If this is a bug, is there a workaround?
>
> Thanks,
> Ami.

В списке pgsql-novice по дате отправления:

Предыдущее
От: Tom Lane
Дата:
Сообщение: Re: [Re: UPDATING and DELETING sub-classes ]
Следующее
От: Boszormenyi Laszlo
Дата:
Сообщение: ...