> Hmm, maybe we need to pull off the project to separate logical attribute
> number from physical and position. It sounds like it could make it
> easier for view modification.
Much easier! It would be a nice feature to have for table as well.
Right now, if you have a table with columns (foo1, foo2, foo3, bar1,
bar2, bar3) and you decide to add column foo4, there's no way to put
it where you intuitively want to put it. Not a big deal, but I'd
definitely use it if we had it.
However, it's not necessary to implement this in order to make
meaningful improvements to CREATE OR REPLACE VIEW. I think the only
thing we need to agree on is that no future implementation of CREATE
OR REPLACE VIEW will ever implicitly rename a column. If we agree on
column name as a measure of column identity, then the change I'm
proposing is forward-compatible with any other enhancements we may
want to make later.
...Robert
