Peter Eisentraut <peter_e@gmx.net> writes:
> I think we can handle that and the cases Tom presents by erroring out
> when the U& syntax is used with stdstr off.
I think you're missing the point --- this is not about whether the
syntax is unambiguous (it is already) but about whether a frontend that
doesn't understand it 100% will be secure against subversion. I have no
confidence in the latter assumption.
regards, tom lane