On 08/05/2008, at 6:27 AM, Chuck Hill wrote:
On May 7, 2008, at 1:14 PM, Robert Walker wrote:
The only time vertical inheritance makes sense if when you always
fetch against leaf nodes of the inheritance tree and only if the
inheritance tree is very shallow. Take that to mean one level deep
of inheritance with an abstract root entity that you never fetch
against.
Anything more complex than that I would recommend single-table.
My 2 cents.
Vertical or horizontal? With vertical this will still select on the
root, won't it?
The restricting qualifier kicks in.
I'd have to turn on adaptor logging to clarify the exact ordering
(which I might do later today), but if the parent entity is called
'Foo' and it has an attribute 'entityType', entityType plays a part in
limiting the result set (assuming you've set up the restricting
qualifier and awakeFromInsertion stuff)
with regards,
--
Lachlan Deck
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