Re: ALTER TABLE DROP COLUMN

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От
Peter Eisentraut
Тема
Re: ALTER TABLE DROP COLUMN
Дата
Msg-id
Pine.LNX.4.21.0002280034590.2468-100000@localhost.localdomain
Ответ на
ALTER TABLE DROP COLUMN (Bruce Momjian)
Список
Дерево обсуждения
psql and Control-C Peter Eisentraut <peter_e@gmx.net>
Re: [HACKERS] psql and Control-C Bruce Momjian <pgman@candle.pha.pa.us>
ALTER TABLE DROP COLUMN Bruce Momjian <pgman@candle.pha.pa.us>
Re: [HACKERS] ALTER TABLE DROP COLUMN Tom Lane <tgl@sss.pgh.pa.us>
Re: ALTER TABLE DROP COLUMN Bruce Momjian <pgman@candle.pha.pa.us>
RE: ALTER TABLE DROP COLUMN "Hiroshi Inoue" <Inoue@tpf.co.jp>
Re: ALTER TABLE DROP COLUMN Bruce Momjian <pgman@candle.pha.pa.us>
RE: ALTER TABLE DROP COLUMN Don Baccus <dhogaza@pacifier.com>
Re: ALTER TABLE DROP COLUMN Tom Lane <tgl@sss.pgh.pa.us>
Re: ALTER TABLE DROP COLUMN Don Baccus <dhogaza@pacifier.com>
Re: ALTER TABLE DROP COLUMN Tom Lane <tgl@sss.pgh.pa.us>
RE: ALTER TABLE DROP COLUMN "Hiroshi Inoue" <Inoue@tpf.co.jp>
Re: ALTER TABLE DROP COLUMN Bruce Momjian <pgman@candle.pha.pa.us>
Re: ALTER TABLE DROP COLUMN Bruce Momjian <pgman@candle.pha.pa.us>
Re: ALTER TABLE DROP COLUMN Tom Lane <tgl@sss.pgh.pa.us>
RE: ALTER TABLE DROP COLUMN "Hiroshi Inoue" <Inoue@tpf.co.jp>
Re: ALTER TABLE DROP COLUMN Tom Lane <tgl@sss.pgh.pa.us>
Re: ALTER TABLE DROP COLUMN The Hermit Hacker <scrappy@hub.org>
Re: ALTER TABLE DROP COLUMN Bruce Momjian <pgman@candle.pha.pa.us>
Re: ALTER TABLE DROP COLUMN Tom Lane <tgl@sss.pgh.pa.us>
Re: ALTER TABLE DROP COLUMN Bruce Momjian <pgman@candle.pha.pa.us>
Re: ALTER TABLE DROP COLUMN The Hermit Hacker <scrappy@hub.org>
Re: ALTER TABLE DROP COLUMN The Hermit Hacker <scrappy@hub.org>
Re: ALTER TABLE DROP COLUMN Tom Lane <tgl@sss.pgh.pa.us>
Re: ALTER TABLE DROP COLUMN The Hermit Hacker <scrappy@hub.org>
Re: ALTER TABLE DROP COLUMN Bruce Momjian <pgman@candle.pha.pa.us>
Re: ALTER TABLE DROP COLUMN The Hermit Hacker <scrappy@hub.org>
Re: ALTER TABLE DROP COLUMN Bruce Momjian <pgman@candle.pha.pa.us>
Re: ALTER TABLE DROP COLUMN The Hermit Hacker <scrappy@hub.org>
Re: ALTER TABLE DROP COLUMN Tom Lane <tgl@sss.pgh.pa.us>
Re: ALTER TABLE DROP COLUMN Bruce Momjian <pgman@candle.pha.pa.us>
Re: ALTER TABLE DROP COLUMN The Hermit Hacker <scrappy@hub.org>
Re: ALTER TABLE DROP COLUMN Bruce Momjian <pgman@candle.pha.pa.us>
Re: ALTER TABLE DROP COLUMN The Hermit Hacker <scrappy@hub.org>
Re: ALTER TABLE DROP COLUMN Bruce Momjian <pgman@candle.pha.pa.us>
Re: ALTER TABLE DROP COLUMN The Hermit Hacker <scrappy@hub.org>
Re: ALTER TABLE DROP COLUMN Don Baccus <dhogaza@pacifier.com>
Re: ALTER TABLE DROP COLUMN Tom Lane <tgl@sss.pgh.pa.us>
Re: ALTER TABLE DROP COLUMN The Hermit Hacker <scrappy@hub.org>
Re: ALTER TABLE DROP COLUMN Peter Eisentraut <peter_e@gmx.net>
Re: [HACKERS] Re: ALTER TABLE DROP COLUMN Bruce Momjian <pgman@candle.pha.pa.us>
RE: [HACKERS] Re: ALTER TABLE DROP COLUMN "Hiroshi Inoue" <Inoue@tpf.co.jp>
Re: [HACKERS] Re: ALTER TABLE DROP COLUMN Bruce Momjian <pgman@candle.pha.pa.us>
Re: [HACKERS] Re: ALTER TABLE DROP COLUMN Tom Lane <tgl@sss.pgh.pa.us>
RE: [HACKERS] Re: ALTER TABLE DROP COLUMN "Hiroshi Inoue" <Inoue@tpf.co.jp>
RE: [HACKERS] Re: ALTER TABLE DROP COLUMN Don Baccus <dhogaza@pacifier.com>
RE: [HACKERS] Re: ALTER TABLE DROP COLUMN The Hermit Hacker <scrappy@hub.org>
RE: [HACKERS] Re: ALTER TABLE DROP COLUMN "Hiroshi Inoue" <Inoue@tpf.co.jp>
Re: [HACKERS] Re: ALTER TABLE DROP COLUMN Bruce Momjian <pgman@candle.pha.pa.us>
RE: [HACKERS] Re: ALTER TABLE DROP COLUMN "Hiroshi Inoue" <Inoue@tpf.co.jp>
RE: [HACKERS] Re: ALTER TABLE DROP COLUMN The Hermit Hacker <scrappy@hub.org>
RE: [HACKERS] Re: ALTER TABLE DROP COLUMN "Hiroshi Inoue" <Inoue@tpf.co.jp>
RE: [HACKERS] Re: ALTER TABLE DROP COLUMN The Hermit Hacker <scrappy@hub.org>
RE: [HACKERS] Re: ALTER TABLE DROP COLUMN "Hiroshi Inoue" <Inoue@tpf.co.jp>
RE: [HACKERS] Re: ALTER TABLE DROP COLUMN The Hermit Hacker <scrappy@hub.org>
RE: [HACKERS] Re: ALTER TABLE DROP COLUMN Don Baccus <dhogaza@pacifier.com>
Re: [HACKERS] Re: ALTER TABLE DROP COLUMN wieck@debis.com (Jan Wieck)
Bruce Momjian writes:

> You can exclusively lock the table, then do a heap_getnext() scan over
> the entire table, remove the dropped column, do a heap_insert(), then a
> heap_delete() on the current tuple,

Wow, that almost seems to easy to be true. I never thought that having
tuples of different structures in the table at the same time would be
possible. If so then I don't see a reason why this would be too hard to
do.


-- 
Peter Eisentraut                  Sernanders väg 10:115
peter_e@gmx.net                   75262 Uppsala
http://yi.org/peter-e/            Sweden



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