| From: | Chris Bitmead <chrisb(at)nimrod(dot)itg(dot)telstra(dot)com(dot)au> |
|---|---|
| To: | Oliver Elphick <olly(at)lfix(dot)co(dot)uk> |
| Cc: | Postgres Hackers List <hackers(at)postgresql(dot)org> |
| Subject: | Re: OO Patch |
| Date: | 2000-05-23 00:57:12 |
| Message-ID: | 3929D768.DC3D35F3@nimrod.itg.telecom.com.au |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
Oliver Elphick wrote:
> These are not subclasses but totally unrelated. Suppose you had
>
> parent (id char(2))
> child1 (a int4)
> child2 (a timestamp)
>
> and someone asks for
>
> select sum(a) from parent*
>
> since the types are incompatible, the answer would be nonsense.
That query would be disallowed, for the reason you note. Ambigous
coloumns would need to be specified by class.attribute.
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Tom Lane | 2000-05-23 00:58:57 | Re: [PORTS] Re: port v7.0 to SGI-IRIX-6.5.7/64 |
| Previous Message | Chris Bitmead | 2000-05-23 00:49:06 | Re: Proposal for enhancements of privilege system |