> Well in the renumbering case, the client needs to know about missing attnos
> and it has to know to ignore negative attnos (which it probably does
> already). ie. psql and pg_dump wouldn't have to be modified in that case.
> In the isdropped case, the client needs to know to exclude any column with
> 'attisdropped' set to true.
> So in both cases, the client needs to be updated.
How about defining a view (or views) which hides these details? Perhaps
a view which is also defined in SQL99 as one of the information_schema
views which we might like to have anyway?
- Thomas