Re: Inheritance and Foreign Keys

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(dot)Elphick(at)lfix(dot)co(dot)uk
Isle of Wight http://www.lfix.co.uk/oliver
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