Re: BETWEEN Node & DROP COLUMN

Tom Lane wrote:
> Hiroshi Inoue <Inoue@tpf.co.jp> writes:
> > Tom Lane wrote:
> >> Actually, your trial required column dropped-ness to be checked in
> >> many more places than the proposed approach does.
> 
> > Have you ever really checked my trial implementation ?
> 
> Well, I've certainly stumbled over it in places like relcache.c
> and preptlist.c, which IMHO should not have to know about this...
> and I have little confidence that there are not more places that
> would have needed fixes if the change had gotten any wide use.
> You were essentially assuming that it was okay for pg_attribute.attnum
> to not agree with indexes into tuple descriptors, which seems very
> shaky to me.

Isn't it only the dropped column that doesn't agree with the descriptor.
The kept columns retain the same numbering, and a NULL sits in the
dropped spot, right?

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