Hierarchial query problem

Question

Hi,
We are trying to convert some old sql code to using Hierarchical queries, but am finding that the connect by expression is causing some errors for us. I have tried to follow the managedEmployees example from the web site but am not getting the parameters set correctly and keep getting the error below. I have attached our old code as well as the new code using Toplink. Please let me know if you see any issues with this.
Also, we have wrapped the Expression and ReadAllQuery classes with our own classes which is why we're not invoking those directly in the code below.
Thanks for the help,
Mark
Old SQL
          DataExpression where = new DataExpression().get("organizationId").notNull();
          String extraSQL = new String("");
          extraSQL += " START WITH organization_id = " + orgId + " ";
          extraSQL += " CONNECT BY PRIOR organization_id = parent_id ";
          where.appendSQL(extraSQL);
Hierarchical query using Toplink
          DataReadAllQuery raq = new DataReadAllQuery(Organization.class);
//          Specify a START WITH expression
          DataExpression startExpr = new DataExpression().get("organizationId").equal(orgId);
//          Specifies a CONNECT BY expression
          DataExpression connectBy = new DataExpression().get("organizationId").equal(new DataExpression().get("parentId"));
//          Specifies an ORDER SIBLINGS BY vector
          Vector order = new Vector();
          raq.setHierarchicalQueryClause(startExpr, connectBy, order);
          return QueryEngine.readAll(raq);
Error
TopLink Warning]: 2005.08.04 06:28:19.765--ServerSession(16237341)--Exception [TOPLINK-6073] (Oracle TopLink - 10g Developer Preview 3 (10.1.3.0 ) (Build 041116)): oracle.toplink.exceptions.QueryException
Exception Description: Malformed expression in query. Attempting to print an object reference into an SQL statement for query key [
Relation operator =
Query Key organizationId
Base mil.usmc.mol.organization.Organization{DatabaseTable(t0)=DatabaseTable(ORGANIZATIONS)}
Query Key parentId
Base mil.usmc.mol.organization.Organization{DatabaseTable(t0)=DatabaseTable(ORGANIZATIONS)}].
Query: ReadAllQuery(mil.usmc.mol.organization.Organization)
Aug 4, 2005 6:28:19 PM mil.usmc.mol.persistence.QueryEngine executeQuery
SEVERE: Error performing query. Nested exception is:
Exception Description: Malformed expression in query. Attempting to print an object reference into an SQL statement for query key [
Relation operator =
Query Key organizationId
Base mil.usmc.mol.organization.Organization{DatabaseTable(t0)=DatabaseTable(ORGANIZATIONS)}
Query Key parentId
Base mil.usmc.mol.organization.Organization{DatabaseTable(t0)=DatabaseTable(ORGANIZATIONS)}].
Query: ReadAllQuery(mil.usmc.mol.organization.Organization)

Answer 1

I've modified it to call the toplink classes directly, but still get the same error..
          ReadAllQuery raq = new ReadAllQuery(Organization.class);
          ExpressionBuilder expressionBuilder = raq.getExpressionBuilder();
          Expression startExpr = expressionBuilder.get("organizationId").equal(orgId);
          Expression connectBy = expressionBuilder.get("organizationId").equal(expressionBuilder.get("parentId"));
          Vector order = new Vector();
          raq.setHierarchicalQueryClause(startExpr, connectBy, order);
          SessionManager manager = SessionManager.getManager();
          Session session = manager.getSession("DEFAULT");
UnitOfWork uow = session.acquireUnitOfWork();
          return (Collection) uow.executeQuery(raq);
[TopLink Info]: 2005.08.05 11:09:32.090--ServerSession(16237341)--TopLink, version: Oracle TopLink - 10g Developer Preview 3 (10.1.3.0 ) (Build 041116)
[TopLink Info]: 2005.08.05 11:09:34.200--ServerSession(16237341)--DEFAULT login successful
[TopLink Warning]: 2005.08.05 11:09:34.262--UnitOfWork(20039836)--Exception [TOPLINK-6073] (Oracle TopLink - 10g Developer Preview 3 (10.1.3.0 ) (Build 041116)): oracle.toplink.exceptions.QueryException
Exception Description: Malformed expression in query. Attempting to print an object reference into an SQL statement for query key [
Relation operator =
Query Key organizationId
Base mil.usmc.mol.organization.Organization{DatabaseTable(t0)=DatabaseTable(ORGANIZATIONS)}
Query Key parentId
Base mil.usmc.mol.organization.Organization{DatabaseTable(t0)=DatabaseTable(ORGANIZATIONS)}].
Query: ReadAllQuery(mil.usmc.mol.organization.Organization)
Local Exception Stack:
Exception [TOPLINK-6073] (Oracle TopLink - 10g Developer Preview 3 (10.1.3.0 ) (Build 041116)): oracle.toplink.exceptions.QueryException
Exception Description: Malformed expression in query. Attempting to print an object reference into an SQL statement for query key [
Relation operator =
Query Key organizationId
Base mil.usmc.mol.organization.Organization{DatabaseTable(t0)=DatabaseTable(ORGANIZATIONS)}
Query Key parentId
Base mil.usmc.mol.organization.Organization{DatabaseTable(t0)=DatabaseTable(ORGANIZATIONS)}].
Query: ReadAllQuery(mil.usmc.mol.organization.Organization)