Problem occured when create a tree table for master-detail view objects using SQL queries?

Question

I am programming a tree table for master-detail view objects using SQL queries and these 2 view objects are not simple singel tables queries, and 2 complex SQL are prepared for master and view objects. see below:
1. Master View object (key attribute is SourceBlock and some varaible bindings are used for this view object.)
SELECT  cntr_list.SOURCE_BLOCK,                   
        sum(                   
         case when cntr_list.cntr_size_q = '20'                   
              then cntr_list.cntr_qty                   
              else 0 end ) as cntr20 ,                   
        sum(                   
         case when cntr_list.cntr_size_q = '40'                   
              then cntr_list.cntr_qty                   
              else 0 end ) as cntr40 ,                   
         sum(                   
         case when cntr_list.cntr_size_q = '45'                   
              then cntr_list.cntr_qty                   
              else 0 end ) as cntr45                    
FROM (       
    SELECT yb1.BLOCK_M as SOURCE_BLOCK,       
           scn.CNTR_SIZE_Q,        
           count(scn.CNTR_SIZE_Q) AS cntr_qty        
    FROM  SHIFT_CMR scm, SHIFT_CNTR scn, YARD_BLOCK yb1, YARD_BLOCK yb2       
    WHERE       
    scm.cmr_n = scn.cmr_n             
    AND (scm.plan_start_dt BETWEEN to_date(:DateFrom,'YYYY/MM/DD HH24:MI:SS') AND to_date(:DateTo,'YYYY/MM/DD HH24:MI:SS')                 
    OR scm.plan_end_dt BETWEEN to_date(:DateFrom,'YYYY/MM/DD HH24:MI:SS') AND to_date(:DateTo,'YYYY/MM/DD HH24:MI:SS'))                 
    AND scm.shift_mode_c = :ShiftModeCode                           
    AND scm.end_terminal_c = :TerminalCode      
    AND scm.start_terminal_c = yb1.terminal_c                  
    AND scm.start_block_n = yb1.block_n                  
    AND substr(scn.start_location_c,(instr(scn.start_location_c,',',1,5)+1),instr(scn.start_location_c,',',1,6)-(instr(scn.start_location_c,',',1,5)+1)) BETWEEN yb1.slot_from_n AND yb1.slot_to_n                  
    AND scm.end_terminal_c = yb2.terminal_c                  
    AND scm.end_block_n = yb2.block_n                  
    AND substr(scn.end_location_c,(instr(scn.end_location_c,',',1,5)+1),instr(scn.end_location_c,',',1,6)-(instr(scn.end_location_c,',',1,5)+1)) BETWEEN yb2.slot_from_n AND yb2.slot_to_n           
    AND scn.status_c not in (1, 11)             
    AND scn.shift_type_c = 'V'             
    AND scn.source_c = 'S'       
    GROUP BY yb1.BLOCK_M, scn.CNTR_SIZE_Q       
) cntr_list       
GROUP BY cntr_list.SOURCE_BLOCK
2. Detail View object (key attributes are SourceBlock and EndBlock and same varaible bindings are used for this view object.)
SELECT  cntr_list.SOURCE_BLOCK, cntr_list.END_BLOCK,                
        sum(                     
         case when cntr_list.cntr_size_q = '20'                     
              then cntr_list.cntr_qty                     
              else 0 end ) as cntr20 ,                     
        sum(                     
         case when cntr_list.cntr_size_q = '40'                     
              then cntr_list.cntr_qty                     
              else 0 end ) as cntr40 ,                     
         sum(                     
         case when cntr_list.cntr_size_q = '45'                     
              then cntr_list.cntr_qty                     
              else 0 end ) as cntr45                      
FROM (         
    SELECT yb1.BLOCK_M as SOURCE_BLOCK,     
           yb2.BLOCK_M as END_BLOCK,  
           scn.CNTR_SIZE_Q,          
           count(scn.CNTR_SIZE_Q) AS cntr_qty          
    FROM  SHIFT_CMR scm, SHIFT_CNTR scn, YARD_BLOCK yb1, YARD_BLOCK yb2         
    WHERE         
    scm.cmr_n = scn.cmr_n               
    AND (scm.plan_start_dt BETWEEN to_date(:DateFrom,'YYYY/MM/DD HH24:MI:SS') AND to_date(:DateTo,'YYYY/MM/DD HH24:MI:SS')                   
    OR scm.plan_end_dt BETWEEN to_date(:DateFrom,'YYYY/MM/DD HH24:MI:SS') AND to_date(:DateTo,'YYYY/MM/DD HH24:MI:SS'))                   
    AND scm.shift_mode_c = :ShiftModeCode                             
    AND scm.end_terminal_c = :TerminalCode        
    AND scm.start_terminal_c = yb1.terminal_c                    
    AND scm.start_block_n = yb1.block_n                    
    AND substr(scn.start_location_c,(instr(scn.start_location_c,',',1,5)+1),instr(scn.start_location_c,',',1,6)-(instr(scn.start_location_c,',',1,5)+1)) BETWEEN yb1.slot_from_n AND yb1.slot_to_n                    
    AND scm.end_terminal_c = yb2.terminal_c                    
    AND scm.end_block_n = yb2.block_n                    
    AND substr(scn.end_location_c,(instr(scn.end_location_c,',',1,5)+1),instr(scn.end_location_c,',',1,6)-(instr(scn.end_location_c,',',1,5)+1)) BETWEEN yb2.slot_from_n AND yb2.slot_to_n             
    AND scn.status_c not in (1, 11)               
    AND scn.shift_type_c = 'V'               
    AND scn.source_c = 'S'         
    GROUP BY yb1.BLOCK_M, yb2.BLOCK_M, scn.CNTR_SIZE_Q         
) cntr_list         
GROUP BY cntr_list.SOURCE_BLOCK, cntr_list.END_BLOCK
3. I create a view link to create master-detail relationship for these 2 view objects.
masterview.SourceBlock (1)->detailview.SourceBlock (*).
4. I create a tree table using these 2 view objects with master-detail relationship.
When I set default value for variable bindings of these 2 view objects and the matching records exist, tree table can work well. I can expand the master row to display detail row in UI.
But I need to pass in dymamic parameter value for variable bindings of these 2 view objects, tree table cannnot work again. when I expand the master row and no detail row are displayed in UI.
I am sure that I pass in correct parameter value for master/detail view objects and matching records exist.
Managed Bean:
        DCIteratorBinding dc = (DCIteratorBinding)evaluteEL("#{bindings.MasterView1Iterator}");
        ViewObject vo = dc.getViewObject();
        System.out.println("Before MasterView1Iterator vo.getEstimatedRowCount()="+ vo.getEstimatedRowCount());
        System.out.println("Before MasterView1Iterator ShiftModeCode="+ vo.ensureVariableManager().getVariableValue("ShiftModeCode"));
        vo.ensureVariableManager().setVariableValue("DateFrom", dateFrom);
        vo.ensureVariableManager().setVariableValue("DateTo", dateTo);
        vo.ensureVariableManager().setVariableValue("ShiftModeCode", shiftModeC);
        vo.ensureVariableManager().setVariableValue("TerminalCode", terminalCode);
        vo.executeQuery();
        System.out.println("MasterView1Iterator vo.getEstimatedRowCount()="+ vo.getEstimatedRowCount());
        DCIteratorBinding dc1 = (DCIteratorBinding)evaluteEL("#{bindings.DetailView1Iterator}");
        ViewObject vo1 = dc1.getViewObject();
        System.out.println("Before DetailView1Iterator vo1.getEstimatedRowCount()="+ vo1.getEstimatedRowCount());
        System.out.println("Before DetailView1Iterator ShiftModeCode="+ vo1.ensureVariableManager().getVariableValue("ShiftModeCode"));
        vo1.ensureVariableManager().setVariableValue("DateFrom", dateFrom);
        vo1.ensureVariableManager().setVariableValue("DateTo", dateTo);
        vo1.ensureVariableManager().setVariableValue("ShiftModeCode", shiftModeC);
        vo1.ensureVariableManager().setVariableValue("TerminalCode", terminalCode);
        vo1.executeQuery();
        System.out.println("after DetailView1Iterator vo1.getEstimatedRowCount()="+ vo1.getEstimatedRowCount());
5.  What's wrong in my implementation?  I don't have no problem to implement such a tree table if using simple master-detail tables view object, but now I have to use such 2 view objects using complex SQL for my requirement and variable bindings are necessary for detail view object although I also think a bit strange by myself.

Answer 1

Hi Frank,
Thank you and it can work.
public void setLowHighSalaryRangeForDetailEmployeesAccessorViewObject(Number lowSalary,
                                                                          Number highSalary) {
        Row r = getCurrentRow();
        if (r != null) {
            RowSet rs = (RowSet)r.getAttribute("EmpView");
            if (rs != null) {
                ViewObject accessorVO = rs.getViewObject();
                accessorVO.setNamedWhereClauseParam("LowSalary", lowSalary);
                accessorVO.setNamedWhereClauseParam("HighSalary", highSalary);
            executeQuery();
but I have a quesiton in this way. in code snippet, it is first getting current row of current master VO to determine if update variables value of detail VO. in my case, current row is possibly null after executeQuery() of master VO and  I have to change current row manually like below.
any idea?
            DCIteratorBinding dc = (DCIteratorBinding)ADFUtil.evaluateEL("#{bindings.SSForecastSourceBlockView1Iterator}");
            ViewObject vo = dc.getViewObject();           
            vo.ensureVariableManager().setVariableValue("DateFrom", dateFrom);
            vo.ensureVariableManager().setVariableValue("DateTo", dateTo);
            vo.ensureVariableManager().setVariableValue("ShiftModeCode", shiftModeC);
            vo.ensureVariableManager().setVariableValue("TerminalCode", terminalCode);
            vo.executeQuery();
            vo.setCurrentRowAtRangeIndex(0);
            ((SSForecastSourceBlockViewImpl)vo).synchornizeAccessorVOVariableValues();