Michaël Lemaire wrote:
Hi all.
I've come across a problem with delete cascade.
I have three tables A, B and C.
Table B has a foreign key on A with delete cascade.
Table C has a foreign key on B with delete cascade.
So, we have this reference chain: C->B->A
All three tables have an 'on delete' trigger.
My problem is, when I delete a row from A, the delete triggers are
fired in the order A then B then C, which is the opposite of what I
expected (the row from B should be deleted before the A one, or the
reference constraint would break).
The "on delete cascade" are (sort of) implemented with system triggers.
So deleting a row from A triggers a delete on B where fkey=X and so on.
This happens with 'after' and 'before' triggers.
I really need the order to be C then B then A.
Why? What are you trying to do?
--
Richard Huxton
Archonet Ltd
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