Re: [PATCH] Return command tag 'REPLACE X' for CREATE OR REPLACE statements. - Mailing list pgsql-hackers

Robert Haas <robertmhaas@gmail.com> writes:
> If we're going to reject this patch on backwards-compatibility
> grounds, we need to make an argument that the backward-compatibility
> hazards are a real concern.  So, again, has anyone complained about
> the changes we made in this area in 9.0?

That 9.0 change was far less invasive than this: it only added a count
field to SELECT and CTAS result tags.  Quite aside from the fact that
the tag name stayed the same, in the SELECT case it's unlikely anyone
would have checked the tag at all rather than just testing for
PQresultStatus() == PGRES_TUPLES_OK.  So it was basically only changing
the result for *one* command type.  I don't think it's a good basis for
arguing that this patch won't cause problems.
        regards, tom lane