| From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
|---|---|
| To: | Hiroshi Inoue <Inoue(at)tpf(dot)co(dot)jp> |
| Cc: | Christopher Kings-Lynne <chriskl(at)familyhealth(dot)com(dot)au>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Rod Taylor <rbt(at)zort(dot)ca>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: DROP COLUMN |
| Date: | 2002-07-16 16:30:31 |
| Message-ID: | 200207161630.g6GGUVu01940@candle.pha.pa.us |
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| Lists: | pgsql-hackers |
Hiroshi Inoue wrote:
> > Makes sense. Of course, we could make a syscache that didn't return
> > system columns either.
> >
> > Actually, the original argument for negative attno's for dropped columns
> > was exactly for this case, that the system column check would catch
> > dropped columns too,
>
> > but it causes other problems that are harder to fix
> > so we _dropped_ the idea.
>
> What does this mean ?
Client programmers prefered the dropped flag rather than negative
attno's so we went with that.
> BTW would we do nothing for clients after all ?
Clients will now need to check that dropped flag.
--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
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