Problem when expanding Tree - Tree with nested table column

Question

Hi, i have created the tree using the Tree with nested table column.
I have created a node called TREE_ROOT in the context.
This node has few attributes which includes children_loaded, is_leaf, is_expanded.
I have created the recursive node TREE_SUB for the above node TREE_ROOT.
In the view, i have created the table with the master column. The above attributes have been mapped accordingly. I have created the action handler for load_children.
In this action handler method, i receive the context_element correctly. In this method, i determine the children of the selected element and the resulting children are attached to this context_element.
But the problem is: when i add elements to context_elements in the method load_children, these
elements get added to the node TREE_ROOT as well.
Please help.
thanks and best regards,
Pramod

Answer 1

I just use some types defined in this user... Well, I hope you know what is the type definition of d_period_sec,
don't you ? I didn't ask to provide all types existed now, only types you are
using.
Anyhow you have been granted with execute privilege for types you are using:
SQL> conn tau_tll/tau_tll;
Connected.
SQL> create or replace type d_period_sec as object (date# date);
  2  /
Type created.
SQL> grant execute on d_period_sec to public with grant option;
Grant succeeded.
SQL> conn scott/tiger
Connected.
SQL> CREATE OR REPLACE TYPE unit_function AS OBJECT (
  2  xi NUMBER,
  3  yi NUMBER,
  4  xe NUMBER,
  5  ye NUMBER,
  6  xm NUMBER,
  7  ym NUMBER,
  8  v NUMBER,
  9  a NUMBER,
10  f NUMBER,
11  descr VARCHAR2 (20)
12  );
13  /
Type created.
SQL> grant execute on unit_function to master;
Grant succeeded.
SQL> CREATE OR REPLACE TYPE unit_moving_point AS OBJECT
  2  (
  3  p tau_tll.d_period_sec, -- from user TAU_TLL
  4 
  5  m unit_function
  6  )
  7  /
Type created.
SQL> grant execute on unit_moving_point to master;
Grant succeeded.
SQL> CREATE OR REPLACE TYPE moving_point_tab AS TABLE OF unit_moving_point;
  2  /
Type created.
SQL> grant execute on moving_point_tab to master;
Grant succeeded.
SQL> CREATE OR REPLACE TYPE moving_point AS OBJECT (u_tab moving_point_tab);
  2  /
Type created.
SQL> grant execute on moving_point to master;
Grant succeeded.
SQL> conn master/master
Connected.
SQL> CREATE TABLE MPOINTS (
  2  id NUMBER,
  3  mpoint scott.Moving_Point)
  4  NESTED TABLE mpoint.u_tab store as moving_tab;
Table created.Rgds.