Hierarchical tree query

dear all,
plz can you explain to me what is this query mean
plz i need it piece by piece
rg_emps := Create_Group_From_Query('rg_emps','select 1, level,last_name, NULL, to_char(employee_id) '||' from employees ' ||'connect by prior employee_id = manager_id ' ||'start with job_id = ''AD_PRES''');i exactly need this part
select 1, level, last_name, null
how could you select null (oooooooh )
plz help & advice

hi
here is an example:
select -1 , level , ename , null , to_char(empno)
from emp start with mgr is null
connect by prior empno = mgror
select 1 , level , ename , null , to_char(empno)
from emp start with mgr is null
connect by prior empno = mgrsarah
Edited by: QGIRCO on Jan 17, 2010 10:27 PM

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I need help with Hierarchical Forms right now. I'm currently trying to implement a hierarchical tree to display the different items in different categories. I have been reading up on it for the past few days, and i do not understand a few things.
What is the difference between a data query and record group? they seem the same to me.
How does the XX = prior XXX work? i understand that this is what connects the parent to the child.
How do you determine what depth the node is? its done in the record group/data query, but how do i decide what level it is dynamically?
Thanks a lot in advance!

Thanks! I am unable to create a table specifically for the tree because i am using tables that have been ported live and are in use. My question about levels is how do I know which depth the node is. For example, i have a category called Information Technology and a category item called Business Informatics. I want to know how to decide that the Category(information technology) is on level 1 and the Item(business informatics) is on level 2.
Information Technology
|_
Business Informatics
And i do know how the Connect By XX = prior XXX works in the data query/record group.
Thanks for your help!

Query for hierarchical tree

I am trying to build a hierarchical tree and tried various option but is unable to show the tree. I have tried using record group and also query text. When I used
Ftree.Set_Tree_Property(htree, Ftree.query_text, 'SELECT 1, hierarchy_level, hierarchy_code, '', hierarchy_desc FROM oms_cust_hierarcy_tree_vw
connect by prior hierarchy_code = hierarchy_parent
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dear member try this query
SQL>
1 SELECT level, LPAD(' ',2*level-2)||emp.ename ename, emp.empno, emp.mgr, emp.deptno
2 FROM Emp
3 CONNECT BY PRIOR emp.empno = emp.mgr
4* START WITH emp.empno = 7839
SQL> /
LEVEL ENAME EMPNO MGR DEPTNO
1 KING 7839 10
2 BLAKE 7698 7839 10
3 MARTIN 7654 7698 10
3 ALLEN 7499 7698 10
3 TURNER 7844 7698 10
3 JAMES 7900 7698 10
3 WARD 7521 7698 10
2 CLARK 7782 7839 10
3 MILLER 7934 7782 10
2 JONES 7566 7839 10
3 FORD 7902 7566 10
4 SMITH 7369 7902 10
5 Ken 999 7369 10
3 SCOTT 7788 7566 10
4 ADAMS 7876 7788 10
M Rizwan

Populate hierarchical tree with Query "Select * from EMP"

Dear(S)
I want to populate a Hierarchical Tree to display results
in a well alligned form as results usually display in SQL Plus environment.
I try much using LPAD() and RPAD() function but fail to get required results.
I want to display more than one field values by concatenating them.
e.g.
SMITH CLERK 800
ALLEN SALESMAN 1600
WARD SALESMAN 1250
JONES MANAGER 2975
Please someone guide me how i can allign more than one field values in a Hierarchical tree.
Thanks and regards,
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Dear Thiru,
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How to go to a particular node in a hierarchical tree?

I want to do this simple thing with a Forms hierarchical tree.
Since tree has lots of levels and branches I want to give a search box.
User types the label and press a button. The form then has to query the tree node and expand ONLY the path where the node is (if found) and highlight it. If a node with a label is NOT found I give an error message to the user.
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Any help will be greatly appreciated?
PROCEDURE Expand_All_Nodes_in_Tree IS
     node ftree.node;
     htree ITEM;
     state varchar2(30);
BEGIN
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Hi Channa,
Try this code with you tree i am using the same situation and this code is working perfect with me.
PROCEDURE find_node_in_tree(search_string varchar2, find_type varchar2) IS
htree ITEM;
search_start_node ftree.node;
find_node ftree.node;
BEGIN
htree := Find_Item('blk_tree.main_tree');
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end if;
Ftree.Set_Tree_selection(htree, find_node, Ftree.SELECT_ON);
exception
     when others then
          NULL;
END;
-Ammad

URGENT *** Hierarchical Tree in Forms 9i *** URGENT

Hello everybody,
for my company I need to build a hierarchical tree item, that will display static data over three levels. Let's say: departments, employees and employee projects.
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When do I fill the Item?
Where do I fill the Item?
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[email protected]

Note:210663.1 helped a bit.
I used the database column as the third element in the select part and put NULL as the fifth element. Then it worked.
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How to set the control-on hierarchical tree nodes

Hi,
I have created form in which at the left it has hierarchical tree structure(BOM) and towards the right it brings up the query results for selected node.
Now, I have a button upon clicking which I navigate to the root node by issuing
"Ftree.set_Tree_selection(htree, 1, Ftree.select_on);".
But, it cannot automatically run the ' when-tree-node-selected' trigger '.
any solution???
Its really urgent.I have a customer demo on monday.
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regards,
Nagadeep.

Hello Nagadeep,
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and run that after the navigation to the item?
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Bernd
The docs state that:
No programmatic action will cause the When-Tree-Node-Selected trigger to fire. Only end-user action will generate an event.
Probably due to performance reasons.
Bernd
Message was edited by:
Bernd Prechtl

Hierarchical tree item - how to improve performance

I'm loading hierarchical tree item with query.
Problem is that it takes very long to load all the items(300, but can be more) to the hierarchical item.
Query takes 0.5 sec., but loading it into the item with Set_Tree_Property(htree, Ftree.RECORD_GROUP
the code:
PL1 := Create_Group_From_Query('pl1', query);
v_ignore := Populate_Group(PL1); -- 0.5 sec
Ftree.Set_Tree_Property(htree, Ftree.RECORD_GROUP, PL1); -- 3 sec.
Does anyone have any idea what to do to improve tree loading?

Hello,
try to play a little bit with the state-column of your query. If you only display the first hierarchy level
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cu
Matthias M|ller

Problem when selecting child node in Hierarchical Tree

I have a hierarchical tree on a form populated thru a table query(form1). When I click on a child node, it opens form2 which contains a tab canvas. After closing forms, I return to the form1(containing Tree). At this point If I want to click on the same child node, I should be able to open form2 again. This doesn't happen.
I have the following code in my When-Tree-node_selected trigger:
Declare
htree item;
vnode_label varchar2(50);
node_clicked FTREE.NODE;
vnode_value number;
vnode_depth number;
v_type number;
v_value varchar2(100);
v_form_name varchar2(100);
v_alert_return number;
begin
-- Find the tree itself.
htree := FIND_ITEM('tree_block.tree');
node_clicked := :SYSTEM.TRIGGER_NODE;
vnode_value := FTREE.NODE_label;
-- Find the value of the node clicked on.
vnode_label := FTREE.GET_TREE_NODE_PROPERTY (htree,:SYSTEM.TRIGGER_NODE,FTREE.NODE_label);
vnode_depth := to_number(ftree.get_tree_node_property(htree,:SYSTEM.TRIGGER_NODE,ftree.Node_depth));
--Open form for node selected on tree and/or specific tab page
if vnode_depth <> 1 then
if :system.trigger_node_selected = 'TRUE' then CASE vnode_label
WHEN 'Personal' then
v_form_name :='HR_PERSONAL_INFO_UPDATE';
WHEN 'Citizenship' then
v_form_name :='HR_PERSONAL_INFO_UPDATE';
WHEN 'Emergency Contact' then
v_form_name :='HR_PERSONAL_INFO_UPDATE';
if id_null(Find_form(v_form_name)) then
open_form(:global.application_path || v_form_name,ACTIVATE,NO_SESSION,SHARE_LIBRARY_DATA);
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go_form(v_form_name);
end if;
END IF;
elsif vnode_depth = 1 then
if :system.trigger_node_SELECTED = 'TRUE' then CASE vnode_label
WHEN 'EMPLOYEE INFO' then
v_form_name :='HR_PERSONAL_INFO_UPDATE';
vnode_label := 'Personal';
WHEN 'REPORTS' then
v_form_name :='HR_REPORTS';
vnode_label := '';
if id_null(Find_form(v_form_name)) then
v_form_name := :global.application_path || v_form_name;
open_form(v_form_name,ACTIVATE,NO_SESSION,SHARE_LIBRARY_DATA);--,p_list);
else
go_form(v_form_name);
end if;
end if;
end;
Can anyone please help me? I don't want the user to double click. They should only click once.
Thanks,
Mercedes

Right clicking does not change the current selection. The tree has no way to report what node was right clicked. Only work around is to left click the node you wish then right click it.
--pat

Hierarchical Tree and keyboard navigation

Does anyone know how to use Hierarchical Trees with keyboards, or to disable keyboard actions? (forms 9.0.4)
My form has a tree which does processing in a When-Tree-Node-Selected trigger to populate some blocks depending on the selected node. If the user selects nodes with the mouse then all is fine, but if they move between nodes with the keyboard then the processing for each selected node is only run the next time a node is selected with the mouse. This means the data for each node will flash up in the blocks for a split second when the mouse is next used.
I've tried Key-Up/Key-Down triggers to prevent keyboard navigation, but they don't fire. Setting Keyboard Navigable to false doesn't fix it either.
Using the When-Tree-Node-Activated trigger doesn't help. The online help says this trigger fires when the user presses Enter or double-clicks a node. I find that each node for which Enter was pressed is processed only when the user next double-clicks a node, and the node they double-click is not processed.
Tree Query:select 1, level, ename, null, null
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message(ftree.get_tree_node_property(
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pause;
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Hi James,
We have got the same problem, after searching Metalink I found that this is a known bug. See Metalink Bug no 4565623 (base bug 4509399).
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Hierarchical Tree not showing using a record group to populate

Hi, I am trying to set up an hierarchical tree. Can someone please give me the exact steps I need to take to get this right.
I am trying to create a hierarchical tree to behave like a menu on a Main form from where I will call the other forms of my application.
I have done the following
select 1, level, null, form_name, form_name
from iso_forms
connect by prior form_name=action
start with action is null
and get this when I run the statement in pl/sql
1 LEVEL NULL FORM_NAME FORM_NAME
1 1 Edit Edit
1 2 Holder Holder
1 2 Isotopes Isotopes
1 2 Laboratories Laboratories
1 2 Personal Personal
1 2 Incident Incident
1 2 Equipment Equipment
1 2 Over Exposure Over Exposure
1 2 Archive Archive
1 1 Print Print
1 1 Queries Queries
My tree on my main form is still blank, I have checked that the tree is the only item in the block but I am not sure how to confirm that it is a control block. I created the tree in layout editor by clicking on the Hierarchical Tree icon on the left and then dragging out a block, so I am assuming that the block is of the correct type.
Thank you for your assistance
Michael

a control block is one not based on a table/view/procedure . check the block's query data source name. its must be blank.
I suggest you create a procedure where you create the record_group using
CREATE_GROUP_FROM_QUERY,populate_group and ftree.set_tree_property
Here is my code that I i used to populate my tree .it works:
PROCEDURE populate_the_tree IS
grp recordgroup;
error_number number;
grpname varchar2(20) :='rg_group';
tree_id item :=find_item('ctrl.tree');
grp_qry2 varchar2(500) :='select -1,level,ename,null,empno from emp start with mgr is null connect by prior empno=mgr';
begin
     grp := find_group(grpname);
     if not id_null(grp)
          then delete_group(grp);
     end if;
--     grp := create_group_from_query(grpname,grp_qry1||grp_qry2);
     grp := create_group_from_query(grpname,grp_qry2);
     error_number:=populate_group(grpname);
     if error_number <> 0
          then message('Error while populating tree');
          raise form_trigger_failure;
     end if;
     ftree.set_tree_property(tree_id,ftree.record_group,grp);
END;
Message was edited by:
lewismak2000

Hierarchical tree traversal..!!

Hi all,
I've populated a tree (Hierarchical tree - Ftree in Forms6i). Now I want to traverse it from the root node to the last nodes' last leaf....
How can i achieve this...
Please guide me through...
Very urgent
Thanx in advance...
RK Raju

a control block is one not based on a table/view/procedure . check the block's query data source name. its must be blank.
I suggest you create a procedure where you create the record_group using
CREATE_GROUP_FROM_QUERY,populate_group and ftree.set_tree_property
Here is my code that I i used to populate my tree .it works:
PROCEDURE populate_the_tree IS
grp recordgroup;
error_number number;
grpname varchar2(20) :='rg_group';
tree_id item :=find_item('ctrl.tree');
grp_qry2 varchar2(500) :='select -1,level,ename,null,empno from emp start with mgr is null connect by prior empno=mgr';
begin
     grp := find_group(grpname);
     if not id_null(grp)
          then delete_group(grp);
     end if;
--     grp := create_group_from_query(grpname,grp_qry1||grp_qry2);
     grp := create_group_from_query(grpname,grp_qry2);
     error_number:=populate_group(grpname);
     if error_number <> 0
          then message('Error while populating tree');
          raise form_trigger_failure;
     end if;
     ftree.set_tree_property(tree_id,ftree.record_group,grp);
END;
Message was edited by:
lewismak2000

Hierarchical tree not showing

Hi, My hierarchical tree is not showing on the form, I have the following situation;
I have a table with the parent and child coloumns, I have created a Record_Group using a query that I have tested in PL/SQL it works
select 1, level, form_name
from iso_forms
connect by prior form_name=action
start with action is null
The rsult is
1 LEVEL FORM_NAME
1 1 Edit
1 2 Holder
1 2 Isotopes
1 2 Laboratories
1 2 Personal
1 2 Incident
1 2 Equipment
1 2 Over Exposure
1 2 Archive
1 1 Print
1 1 Queries
11 rows selected.
I have set in the properties of the tree to use the Record_Group that has this query, but when I run the form I only see a blank square where the tree should be showing.
Can anyone tell me what I am doing wrong?
Thank you
Michael

a control block is one not based on a table/view/procedure . check the block's query data source name. its must be blank.
I suggest you create a procedure where you create the record_group using
CREATE_GROUP_FROM_QUERY,populate_group and ftree.set_tree_property
Here is my code that I i used to populate my tree .it works:
PROCEDURE populate_the_tree IS
grp recordgroup;
error_number number;
grpname varchar2(20) :='rg_group';
tree_id item :=find_item('ctrl.tree');
grp_qry2 varchar2(500) :='select -1,level,ename,null,empno from emp start with mgr is null connect by prior empno=mgr';
begin
     grp := find_group(grpname);
     if not id_null(grp)
          then delete_group(grp);
     end if;
--     grp := create_group_from_query(grpname,grp_qry1||grp_qry2);
     grp := create_group_from_query(grpname,grp_qry2);
     error_number:=populate_group(grpname);
     if error_number <> 0
          then message('Error while populating tree');
          raise form_trigger_failure;
     end if;
     ftree.set_tree_property(tree_id,ftree.record_group,grp);
END;
Message was edited by:
lewismak2000

Hierarchical Tree control

Dear all,
Any body send me hints or sample codes about using Hierarchical tree control in forms

Type that into google and you should get some stuff. The biggest thing to remember is the query MUST have (presuming you are populating a tree from a db) certain values.
Check out this dicussion which I started when I was learning: Re: Creating a menu system (not a file menu)

Hierarchical tree query

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