Peter Eisentraut <peter_e(at)gmx(dot)net> writes:
> Tom Lane writes:
>> This is a nonstarter, as is the previous proposal to have a single
>> function with an explicit parameter that selects the behavior. The
>> reason is that any such function would have to be treated as completely
>> non-optimizable.
> Why? We would just need to ensure that the mode cannot be changed at
> critical times.
"critical time" being anywhere within a session, I guess? Either that
or keep track of whether any cached plans depend on the stability
assumption.
regards, tom lane