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From Gabriele Kahlout <gabri...@mysimpatico.com>
Subject Re: how to cascade on update? Not possible?
Date Mon, 15 Mar 2010 22:35:08 GMT
I was pretty convinced, that in an update if the referenced column is
updated so is the refererring. How can one achieve this behavior
automatically?

2010/3/15, Gabriele Kahlout <gabriele@mysimpatico.com>:
> Hello,
>
> I've moved my database from SQLite into Java DB using SQLWrapper.
> I expected the references integrity constraint, to cascade on update.
> I.e. wColumn in refTable, references expColumn in expTable. Updating
> expColumn should update wColumn.
> However I get:
> java.sql.SQLIntegrityConstraintViolationException: UPDATE on table
> 'EXPRESSIONS' caused a violation of foreign key constraint
> 'SQL100315193342610' for key (la testa).  The statement has been
> rolled back.
>
> The only reference I found, seems to suggest for UPDATE it's not
> possible to cascade. Is that the case?
> http://db.apache.org/derby/docs/10.5/ref/
>
> --
> Regards,
> K. Gabriele
>
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-- 
Regards,
K. Gabriele

--- unchanged since 25/1/10 ---
P.S. Unless a notification (LON), please reply either with an answer
OR with " ACK" appended to this subject within 48 hours. Otherwise, I
might resend.
In(LON, this) ∨ In(48h, TimeNow) ∨ ∃x. In(x, MyInbox) ∧ IsAnswerTo(x,
this) ∨ (In(subject(this), subject(x)) ∧ In(ACK, subject(x)) ∧
¬IsAnswerTo(x,this)) ⇒ ¬IResend(this).

Also note that correspondence may be received only from specified a
priori senders, or if the subject of this email ends with a code, eg.
-LICHT01X, then also from senders whose reply contains it.
∀x. In(x, MyInbox) ⇒ In(senderAddress(x), MySafeSenderList) ∨ (∃y.
In(y, subject(this) ) ∧ In(y,x) ∧ isCodeLike(y, -LICHT01X) ).

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