> I do think that TRUNCATE is DDL, not DML,

So, here we all have agreement, good.

> but I'm not convinced that
> consensus has been reached. How the decision is reached is just as
> important as the decision itself.

Which questions left open ? May be i missed something...

> That said, may I recommend that new pointer page and index root page be
> created and RDB$PAGES updated (and flushed) before deleting old pointer,
> data, and index pages? That way the system will be validate over a
> crash/restart.

Of course. Thanks for the tip.

Regards,
Vlad