Tom Lane wrote:
>
> Zeugswetter Andreas SB <ZeugswetterA@wien.spardat.at> writes:
> > My conclusion would be that we need both:
> > 1. a fast system table only solution with physical/logical column id
> > 2. a tool that does the cleanup (e.g. vacuum)
>
> But the peak space usage during cleanup must still be 2X.
Perhaps he means some kind of off-line cleanup tool, that has only the
requirement of being able to continue from where it left off (or
crashed) ?
It could be useful in some cases (like removing a column on saturday
from a
terabyte-sized file that is used only on weekdays :)
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Hannu