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https://issues.apache.org/jira/browse/OPENJPA-2618?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15030051#comment-15030051
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Oliver Gierke commented on OPENJPA-2618:
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I guess per the spec it should be an {{IllegalArgumentException}} instead.
> Query for Tuple does not return Tuple instance
> ----------------------------------------------
>
> Key: OPENJPA-2618
> URL: https://issues.apache.org/jira/browse/OPENJPA-2618
> Project: OpenJPA
> Issue Type: Bug
> Components: jpa
> Affects Versions: 2.4.0
> Reporter: Oliver Gierke
>
> {code:java}
> TypedQuery<Tuple> query = em.createQuery("SELECT u.firstname from User u",
> Tuple.class);
> List<Tuple> result = query.getResultList();
> List<TupleElement<?>> elements = result.get(0).getElements();
> {code}
> This breaks at {{result.get(0)}} with {{java.lang.ClassCastException:
> java.lang.String cannot be cast to javax.persistence.Tuple}}.
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