[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-2900) Autodiscovery results ignored by scroll()

[Gail Badner (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-2900?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_28509 ] 

Gail Badner commented on HHH-2900:
----------------------------------

Please attach a runnable test case (Java + mapping that reproduces this issue.

Also, please add a comment containing the full stacktrace.

> Autodiscovery results ignored by scroll()
> -----------------------------------------
>
>                 Key: HHH-2900
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2900
>             Project: Hibernate3
>          Issue Type: Bug
>          Components: query-hql, query-sql
>    Affects Versions: 3.2.4.sp1
>            Reporter: Sergey Koshcheyev
>            Priority: Minor
>
> Running this piece of code:
> 		session.createSQLQuery("create table tab(col integer)").executeUpdate();
> 		session.createSQLQuery("insert into tab values (1)").executeUpdate();
> 		ScrollableResults sr = session
> 			.createSQLQuery("select col from tab")
> 			.addScalar("col")
> 			.scroll(ScrollMode.FORWARD_ONLY);
> 		sr.next();
> 		sr.getInteger(0);
> produces java.lang.NullPointerException
> 	at org.hibernate.impl.AbstractScrollableResults.getFinal(AbstractScrollableResults.java:126)
> 	at org.hibernate.impl.AbstractScrollableResults.getInteger(AbstractScrollableResults.java:208)
> The problem seems to be Loader.scroll() is using its returnTypes parameter when instantiating ScrollableResultsImpl instead of letting CustomLoader use its autodiscovered resultTypes array.
> A workaround seems to be to use ScrollableResults.get(int) since it doesn't rely on type information.

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