Re: DROP COLUMN

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От Bruce Momjian
Тема Re: DROP COLUMN
Дата
Msg-id 200207160504.g6G54Oc15845@candle.pha.pa.us
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Ответ на Re: DROP COLUMN  ("Christopher Kings-Lynne" <chriskl@familyhealth.com.au>)
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Christopher Kings-Lynne wrote:
> > > In fact, looking at it logically...if all the commands currently are
> > > required to check that they're not modifiying a system column,
> > then why not
> > > add the requirement that they must also not modify dropped
> > columns?  I can
> > > do a careful doc search and try to make sure I've touched everything...
> >
> > Makes sense.  Of course, we could make a syscache that didn't return
> > system columns either.
> 
> Actually - are you certain that every command uses a SearchSysCache and not
> some other weirdness?  If we have to do the odd exception, then maybe we
> should do them all as 'exceptions'?

I actually don't know.  I know all the table name lookups do use
syscache or temp tables wouldn't have worked.  ;-)

--  Bruce Momjian                        |  http://candle.pha.pa.us pgman@candle.pha.pa.us               |  (610)
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