Re: Function Volatility Stable vs Immutable

On 6/24/2019 7:38 PM, David G. Johnston wrote:
> On Mon, Jun 24, 2019 at 7:31 PM Igal @ Lucee.org <igal(at)lucee(dot)org
> <mailto:igal(at)lucee(dot)org>> wrote:
>
> 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?
>
>
> Yes
>
> Forever means beyond the lifetime of a single transaction and thus it
> is possible for the changing of the table contents to impact the
> return value of the function.

Thanks for clarifying, David.

Igal