Re: Inheritance and Foreign Keys

Is it planned to include these features to class inheritance?

Nelio

Oliver Elphick wrote:
>
> Nelio Alves Pereira Filho wrote:
>   >Here's my situation: I have the following relation
>   >
>   >table A -----<>------ table B
>   >             1:N
>   >
>   >I created the two tables, and a foreign key from A into B. Now I want to
>   >create other tables that inherit from B, but I want that the relation
>   >exists for all of them. For that, I created another table, C, that had
>   >just one field and inherited from B. No errors showed up, but it didn't
>   >complain when I inserted some data into C without the corresponding one
>   >in A!!
>   >
>   >Is it possible to do what I intended?
>
> Unfortunately not.  Inheritance is not properly thought out; at present
> it allows fields to be duplicated and records selected from an inheritance
> hierarchy, but this is relatively useless because constraints are not
> inherited and indexes are not shared.
>
> --
> Oliver Elphick                                Oliver.Elphick@lfix.co.uk
> Isle of Wight                              http://www.lfix.co.uk/oliver
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>      "But because of his great love for us, God, who is rich
>       in mercy, made us alive with Christ even when we were
>       dead in transgressions-it is by grace you have been
>       saved."        Ephesians 2:4,5

--
Nelio Alves Pereira Filho
IFX Networks - www.ifx.com.br
+55 11 3365-5863
nelio@ifx.com.br