Robert Haas <robertmhaas@gmail.com> writes:
> ... The fact that not very many people will want to do
> something is not a reason to prevent it.
It's not about preventing it for no reason. The proposed patch removes a
significant sanity check from code that still hasn't gotten out of beta.
I might be willing to remove it in 9.1; I am *not* willing to remove it
from 9.0.
regards, tom lane