Alex Pilosov <alex(at)pilosoft(dot)com> writes:
>> Consider statement boundaries in an SQL function --- the
>> function is probably being called from some outer statement, so
>> advancing now() within the function would violate the spec constraint
>> with respect to the outer statement.
> Postgres doesn't have an idea of what a 'top-level' statement is? I.E.
> statement as submitted by a client (libpq)?
There's never been any reason to make such a distinction.
Nor am I entirely convinced that that's the right definition...
regards, tom lane