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From "Patrick Linskey (JIRA)" <j...@apache.org>
Subject [jira] Commented: (OPENJPA-212) Constructor expression permits no other expressions in SELECT clause
Date Tue, 10 Apr 2007 23:12:32 GMT

    [ https://issues.apache.org/jira/browse/OPENJPA-212?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12487948
] 

Patrick Linskey commented on OPENJPA-212:
-----------------------------------------

You don't have a test case handy for this by any chance, do you?

> Constructor expression permits no other expressions in SELECT clause
> --------------------------------------------------------------------
>
>                 Key: OPENJPA-212
>                 URL: https://issues.apache.org/jira/browse/OPENJPA-212
>             Project: OpenJPA
>          Issue Type: Bug
>          Components: query
>    Affects Versions: 0.9.7
>            Reporter: Jacek Laskowski
>
> It seems that it's impossible to run a query with constructor expression beside other
expressions in SELECT clause. Take a look at the following test that finishes with ClassCastException
when the first element of resultQuery is returned (the 2nd line of the snippet).  Am I doing
something plain wrong?
> It doesn't work with Hibernate EntityManager 3.3.1, either yet TopLink Essentials 2.0
BUILD 40 runs fine.
>   Query query = em.createQuery("SELECT NEW pl.jaceklaskowski.jpa.PewnaKlasa(p.nazwa,
o.imie, o.nazwisko, o.numer), o, p.nazwa FROM Projekt p JOIN p.chair o");
>   List<Object[]> resultQuery = query.getResultList();
>   final Object[] firstElementInQueryResult = resultQuery.get(0);
>   assert firstElementInQueryResult.length == 3;
>   final Object firstElement = resultQuery.get(0)[0];
>   assert firstElement instanceof PewnaKlasa;
>   final Object secondElement = resultQuery.get(0)[1];
>   assert secondElement instanceof Osoba;
>   final Object thirdElement = resultQuery.get(0)[2];
>   assert thirdElement instanceof String;
> The exception is as follows (the line number is different though as the test above is
incomplete - no class, imports and alike are shown):
> java.lang.ClassCastException: pl.jaceklaskowski.jpa.PewnaKlasa
>         at pl.jaceklaskowski.jpa.OpenJPATest.testConstructorExpr(OpenJPATest.java:19)

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