Mike Kear wrote:
> What is going to happen is event type {a} happens (lets say it's a
> sale).  That triggers a default action plan of umpteen things that
> have to follow based on that event, documents that have to be filed,
> people notified, approvals gained etc, then the the default plan has
> to be modified to allow for the specifics of this particular
> transaction.
> 
> So the event has to trigger the generation of a whole heirarchy of
> maybe up to 50 things that have to happen, some of which rely on
> previous things being done

Would it be correct to say you have a table with X independent 
hierarchies with about 50 elements per hierarchy with their own left and 
right values, where you can identify which hierarchy an element belongs 
to because they all reference the original event (the sale)? Because in 
that case when you update a hierarchy you are only updating a limited 
range of the total table. That really shouldn't pose any performance 
problems for a well tuned database.

Jochem

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