....Tree structure problem

Question

Hi all
i am able to populate a tree structure.
The Root Nodes displays the Name of the Employees and each roots childs display 2nd level root named, New Request recieved, Cancelled requests.
Now i want is that whenever the application runs, only the employee should expand its own Node. and if it clicks the node of other employeess , their Node should not Expand. ...
I dont know how to do that ..
i know there is a trigger when node expand, but i dont know how to use the check...
I mean suppose
x:=Get_application_property(USERNAME);
if :NODE_Label <> x then
msg ('''dont open in others mail box');
Raise Form trigger Failure
end if
Is this code ok..
kindly reply ..
thnx alot

Answer 1

I assume you're creating the tree with a 'connect by' query, so why not just use the query to filter out the nodes you don't want to be viewed?
Eg, table ee with this data (I use ¬ as my null indidcator):
SQL> SELECT * FROM ee;
A          B
¬          BOB
¬          JACK
¬          TOM
BOB        New
JACK       New
TOM        New
BOB        Cancelled
JACK       Cancelled
TOM        Cancelled
9 rows selected.Selecting all rows hierarchically:
SQL> SELECT LPad(' ',(level - 1) * 4,' ')||b
  2  FROM ee
  3  CONNECT BY PRIOR b = a
  4  START WITH a IS NULL;
LPAD('',(LEVEL-1)*4,'')||B
BOB
    New
    Cancelled
JACK
    New
    Cancelled
TOM
    New
    Cancelled
9 rows selected.Selecting child nodes for BOB and no other:
SQL> SELECT LPad(' ',(level - 1) * 4,' ')||b
  2  FROM ee
  3  WHERE a = 'BOB' OR a IS NULL
  4  CONNECT BY PRIOR b = a
  5  START WITH a IS NULL;
LPAD('',(LEVEL-1)*4,'')||B
BOB
    New
    Cancelled
JACK
TOM
SQL>