> To make that happen would require (at least) a full table scan. I think
> most people are more interested in DROP COLUMN being a cheap operation
> than in having the space be reclaimed quickly.
> For a comparison point: large field values that don't happen to get
> toasted don't vanish immediately, either.
I agree DROP COLUMN should be cheap and I don't really expect it to happend immediately,
but shouldn't VACUUM FULL clean it up?
Wojtek Strzalka