Named query with join tables

Question

I have two tables
- Process_Master (EVENT_ID, EVENT_TYP, STATUS)
- Rel_Event( EVENT_ID, USERID, EVENT_DATE, RMKS)
They have one-to-one relationship linked by EVENT_ID.
I would like to create a named query like below joining 2 tables together.
Do I need to create any class descriptor first and how? I want this query to be available from the ADF data control so I can drag and drop this to my JSP page as a ADF table. I have no problem in working with single table. I have read thru the developer guide and try out many things like multitable info, aggregate mapping and couldn't figure out how this can be done. Please help!!!
SELECT A.EVENT_ID,B.EVENT_DATE, A.STATUS, B.RMKS
FROM PROCESS_MASTER A, REL_EVENT B
WHERE A.EVENT_ID = B.EVENT_ID
AND A.STATUS = 'P';
********/

Answer 1

I have tried the below but fail to retrieve any rows. Please help!
Expression aid = new ExpressionBuilder(ProcEventMaster.class).get("event_id");
Expression bid = new ExpressionBuilder(RelEvent.class).get("event_id");
ReportQuery reportQuery = new ReportQuery(ProcEventMaster.class,aid.equal(bid));
reportQuery.addAttribute("a_id", aid);
reportQuery.addAttribute("b_id", bid);
reportQuery.addAttribute("eventDate",bid.get("event_date"));
reportQuery.addAttribute("remarks",bid.get("rmks"));
reportQuery.setSelectionCriteria(aid.get("status").equal("P"));
List<RelEvent> results =
(List<RelEvent>)session.executeQuery(reportQuery);session.release();
return results;