> -----Original Message-----
> From: Tom Lane [mailto:tgl@sss.pgh.pa.us]
>
> "Christopher Kings-Lynne" <chriskl@familyhealth.com.au> writes:
> > OK, I've been looking at Hiroshi's implementation. It's basically
> > semantically equivalent to mine from what I can see so far. The only
> > difference really is in how the dropped columns are marked.
>
> True enough, but that's not a trivial difference. The problem with
> Hiroshi's implementation is that there's no longer a close tie between
> pg_attribute.attnum and physical positions of datums in tuples. I think
> that that's going to affect a lot of low-level code, and that he hasn't
> found all of it.
Please don't propagate an unfair valuation without any verification.
regards,
Hiroshi Inoue