Re: SQL99 CREATE TABLE ... (LIKE parent_table) - Mailing list pgsql-patches

From Rod Taylor
Subject Re: SQL99 CREATE TABLE ... (LIKE parent_table)
Date
Msg-id 1052829659.30791.15.camel@jester
Whole thread Raw
In response to Re: SQL99 CREATE TABLE ... (LIKE parent_table)  (Hannu Krosing <hannu@tm.ee>)
Responses Re: SQL99 CREATE TABLE ... (LIKE parent_table)  (Hannu Krosing <hannu@tm.ee>)
Re: SQL99 CREATE TABLE ... (LIKE parent_table)  (Hannu Krosing <hannu@tm.ee>)
List pgsql-patches
On Tue, 2003-05-13 at 05:08, Hannu Krosing wrote:
> Tom Lane kirjutas E, 12.05.2003 kell 17:59:
> > Rod Taylor <rbt@rbt.ca> writes:
> > > Quick patch to add the subject.  Restructures all inheritance to consist
> > > of a few flags to indicate which structures we want to inherit
> >
> > I think overloading the inheritance mechanism to serve this purpose is a
> > bad idea.
>
> Are you sure that LIKE is not _supposed_ to be inheritable. I mean that
> changes done to the LIKE table should carry over to the table defined
> using LIKE:

> create table template( i int);
> create table instance(like template, t text);
> alter table template add column j int;
>
> and now instance should have columns i,j,t .

It is described as being replaced by the column definitions within the
new table, with no mention of connection to the parent table..

11.3, 6, d) "The <like clause> is effectively replaced by NCi, 1 (one)
<= i <= cnt"

--
Rod Taylor <rbt@rbt.ca>

PGP Key: http://www.rbt.ca/rbtpub.asc

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