Hi Michael,
I'd expect a JDOUserException to be thrown.
The spec says
<spec 14.6.11>
void setUnique(boolean unique);
A14.6.11-1 [When the value of the Unique flag is true, then the
result of a query is a single value, with null used to indicate that
none of the instances in the candidates satisfied the filter. If more
than one instance satisfies the filter, and the range is not limited
to one result, then execute throws a JDOUserException.]
</spec 14.6.11>
I can add a similar description to the deletePersistentAll methods.
It might require the JDOUserException to be thrown before actually
deleting anything (the semantics of the method are such that a select
needs to be executed against the datastore anyway before the delete
occurs).
Another alternative is to disallow the Unique flag for
deletePersistentAll. But that's not what I would choose.
Craig
On Nov 25, 2005, at 6:07 AM, Michael Watzek wrote:
Hi,
I have a question concerning unique deletion by query:
Assuming a unique JDO query would throw a JDOUserException in
execute() because the result is not unique, would you expect a
JDOUserException thrown in deletePersistentAll()?
The spec does not require this and I'm not sure if we should add a
negative test case checking this.
Regards,
Michael
--
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Michael Watzek [EMAIL PROTECTED] Engineering GmbH
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Craig Russell
Architect, Sun Java Enterprise System http://java.sun.com/products/jdo
408 276-5638 mailto:[EMAIL PROTECTED]
P.S. A good JDO? O, Gasp!
