| From: | Hiroshi Inoue <Inoue(at)tpf(dot)co(dot)jp> |
|---|---|
| To: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
| 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: | 2002-07-17 04:11:42 |
| Message-ID: | 3D34EE7E.59246094@tpf.co.jp |
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| Lists: | pgsql-hackers |
Bruce Momjian wrote:
>
> Hiroshi Inoue wrote:
> > Bruce Momjian wrote:
> > >
> > > Hiroshi Inoue wrote:
>
> > > > BTW would we do nothing for clients after all ?
> > >
> > > Clients will now need to check that dropped flag.
> >
> > Clients would have to check the flag everywhere
> > pg_attribute appears.
> > Why should clients do such a thing ?
>
> Well, good question. They could easily skip the dropped columns if we
> used negative attno's because they usually already skip system columns.
> However, they prefered a specific dropped column flag and positive
> attno's. I don't know why. They would have to explain.
I don't stick to negative attno's but
> >From my perspective, when client coders like Dave Page and others say
> they would prefer the flag to the negative attno's, I don't have to
> understand. I just take their word for it.
do they really love to check attisdropped everywhere ?
Isn't it the opposite of the encapsulation ?
I don't understand why we would do nothing for clients.
regards,
Hiroshi Inoue
http://w2422.nsk.ne.jp/~inoue/
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