Thomas Hallgren <thhal(at)mailblocks(dot)com> writes:
> The Rationale for my opinion is that since there is a need to accomplish
> what Gaetano needs, there should be declarative power to express it and
> thus, prevent "unsafe" designs. We need a way to declare a function
> "stable with no _intrusive_ side effects".
What you think is non-intrusive may not be so at the database's level.
regards, tom lane