Function Volatility Stable vs Immutable

[Igal @ Lucee.org]

If a function select data from a table, and the rows in the table may 
change, would that function qualify for Immutable or does it have to be 
Stable?  I'm asking because according to the docs [1]: "An IMMUTABLE 
function cannot modify the database and is guaranteed to return the same 
results given the same arguments forever".

So for the same arguments, the result would change only if the data in 
the table changes.  Does that mean that it violates the "forever" clause 
and therefore can be only marked as Stable and not Immutable?

Thanks,

Igal