Re: BETWEEN Node & DROP COLUMN

Tom Lane wrote:
> Bruce Momjian <pgman@candle.pha.pa.us> writes:
> > Tom Lane wrote:
> >> No, he only breaks even for client cleanliness --- either approach
> >> *will* require changes in clients that look at pg_attribute.
> 
> > Uh, Christopher already indicated three clients, psql, pg_dump, and
> > another that will not require changes for Hiroshi's approach, but will
> > require changes for isdropped.
> 
> Oh?  If either psql or pg_dump don't break, it's a mere coincidence,
> because they certainly depend on attnum.  (It's also pretty much
> irrelevant considering they're both under our control and hence easily
> fixed.)
> 
> I'm fairly certain that Christopher is mistaken, anyhow.  Check the
> manipulations of attribute defaults for a counterexample in pg_dump.

Well, it seems isdropped is going to have to be checked by _any_ client,
while holes in the number will have to be checked by _some_ clients.  Is
that accurate?

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