Re: Inheritance, Primary Keys and Foreign Keys

Ühel kenal päeval, N, 2006-05-11 kell 23:28, kirjutas Albert Cervera
Areny:
> Of course, that's an option for my case. Just wanted to know if this solution
> could be useful for PostgreSQL in general. Mainly because I'll add some
> triggers to check what maybe PostgreSQL should do itself but it's
> unimplemented.
>
> If that's not interesting or a proper solution for PostgreSQL I'll add it
> using the existing DDL in my application and that's all.
>
> What do you think?
>
> A Tuesday 09 May 2006 21:43, Simon Riggs va escriure:
> > On Tue, 2006-05-09 at 01:20 +0200, Albert Cervera Areny wrote:
> > > In my particular case (don't know about the SQL standard or other
> > > cases), it'd be enough if when an inherited table is created:
> > > - A primary key in the inherited table is created with the same columns
> > > as the super table.

This is the simple part.

> > > - A trigger is created in the new table that ensures that this primary
> > > key doesn't exist in the super table.

This grows very expensive fast, once you have more thean one inherited
table

> > > - A trigger is created in the super table that ensures that this primary
> > > key doesn't exist in it's sub tables.

Ditto

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