Re: ALTER TABLE DROP COLUMN

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От Bruce Momjian
Тема Re: ALTER TABLE DROP COLUMN
Дата
Msg-id 200010100005.UAA29356@candle.pha.pa.us
обсуждение исходный текст
Ответ на Re: ALTER TABLE DROP COLUMN  (The Hermit Hacker <scrappy@hub.org>)
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> > > > > I am not convinced that a 2x penalty for DROP COLUMN is such a huge
> > > > > problem that we should give up all the normal safety features of SQL
> > > > > in order to avoid it.  Seems to me that DROP COLUMN is only a big issue
> > > > > during DB development, when you're usually working with relatively small
> > > > > amounts of test data anyway.
> > > > > 
> > > > 
> > > > Bingo!
> > > 
> > > you are jumping on your 'I agree/Bingo' much much too fast :)  
> > 
> > You know this DROP COLUMN is a hot button for me.
> 
> Ya, but in one email, you appear to agree with me ... then Tom posts a
> good point and you jump over to that side ... at least pick a side? :)  I
> too wish to see it implemented, I just don't want to have to double my
> disk space if at some point I decide to upgrade an application and find
> out that they decided to change their schema(s) :(

Sorry, I liked the vacuum idea, but 2x disk usage, not 100 at a time.

--  Bruce Momjian                        |  http://candle.pha.pa.us pgman@candle.pha.pa.us               |  (610)
853-3000+  If your life is a hard drive,     |  830 Blythe Avenue +  Christ can be your backup.        |  Drexel Hill,
Pennsylvania19026
 


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