Can't execute SQL Named query that uses connect by...

I'm having problems using the connect by with ReportQuery.setHierarchicalQueryClause (detailed in earlier post) so I defined a named query to execute the following sql;
select distinct(role_id)
from role_principal
connect by prior role_id = principal_id
start with principal_id = #principalId
When I run similar SQL in SqlPlus, i get results like this;
ROLE_ID
202
500
501
502
503
But when I run the query using Toplink like this;
Vector args = new Vector();
args.add(principal.getId());
roles = (Vector) session.executeQuery("orclGetRolesOfPrincipal", args);
I get this exception;
TopLink Warning]: 2005.10.05 10:58:14.362--ClientSession(18082301)--Thread(Thread[main,5,main])--Local Exception Stack:
Exception [TOPLINK-6044] (Oracle TopLink - 10g Developer Preview 3 (10.1.3.0 ) (Build 041116)): oracle.toplink.exceptions.QueryException
Exception Description: The primary key read from the row [DatabaseRecord(
     ROLE_PRINCIPAL.ROLE_ID => 202)] during the execution of the query was detected to be null. Primary keys must not contain null.
Query: ReadAllQuery(oracle.xdo.server.security.authorization.model.RolePrincipalRelation)
     at oracle.toplink.exceptions.QueryException.nullPrimaryKeyInBuildingObject(QueryException.java:662)
     at oracle.toplink.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:349)
     at oracle.toplink.internal.descriptors.ObjectBuilder.buildObjectsInto(ObjectBuilder.java:633)
     at oracle.toplink.internal.queryframework.DatabaseQueryMechanism.buildObjectsFromRows(DatabaseQueryMechanism.java:141)
     at oracle.toplink.queryframework.ReadAllQuery.executeObjectLevelReadQuery(ReadAllQuery.java:440)
     at oracle.toplink.queryframework.ObjectLevelReadQuery.executeDatabaseQuery(ObjectLevelReadQuery.java:727)
     at oracle.toplink.queryframework.DatabaseQuery.execute(DatabaseQuery.java:559)
     at oracle.toplink.queryframework.ReadAllQuery.execute(ReadAllQuery.java:408)
     at oracle.toplink.publicinterface.Session.internalExecuteQuery(Session.java:1977)
     at oracle.toplink.publicinterface.Session.executeQuery(Session.java:973)
     at oracle.toplink.publicinterface.Session.executeQuery(Session.java:945)
     at oracle.xdo.server.dataservices.impl.toplink.TLDataAccessManagerImpl.getObjects(TLDataAccessManagerImpl.java:346)
It seems to have a problem that there's not a parent record for role_id 202, which is a root level record and so should not have a parent.
I appreciate any help that can be provided.
Thanks,
-Tim Watson

Hello Tim,
Not sure of the problem in the first post, but in this one, you are executing the query as a ReadAllQuery. The results only contain the role_id, but TopLink expecting atleast all the primary key fields inorder to build the objects to return them to you. Try executing this SQL in a report query instead, or set the results to return all the fields so TopLink can build the objects.
Best Regards,
Chris

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