Hierarchical DATA?

I KNOW WHAT IS hierarchical DATA
IN WHICH THE A RECORD HAVE A CHILD AND PARENT RELATION SHIP.
IN WHICH A RECORD SHOULD HAVE ONLY ONE PARENT DATA.
IS THIS RIGHT ANSWER??????
AND I CAN DISPLAY EMP TABLE RECORDS IN hierarchical MODEL
BUT THESE TABLES WILL HAVE THE EXACT MODEL OF hierarchical????????????
IF A TABLE HAVE ONLY hierarchical DATA HOW CAN I RETRIVE THAT DATA???????

I KNOW WHAT IS hierarchical DATA
IN WHICH THE A RECORD HAVE A CHILD AND PARENT RELATION SHIP.
IN WHICH A RECORD SHOULD HAVE ONLY ONE PARENT DATA.
Not Necessary...there can be many to many relationships also
IS THIS RIGHT ANSWER??????
AND I CAN DISPLAY EMP TABLE RECORDS IN hierarchical MODEL
BUT THESE TABLES WILL HAVE THE EXACT MODEL OF hierarchical????????????
What do you mean by "exact model of hierarchy". Plz ask questions clearly...
IF A TABLE HAVE ONLY hierarchical DATA HOW CAN I RETRIVE THAT DATA???????
If i understood your point, then I think you want to ask that if in a table, 2 columns are sharing dependency. Eg: empid and manager_id relationship in employee table. In this case also, we can retrive the data using connect by
select level, manager_id,empid
from employees
start with manager_id=null
connect by prior employee_id = manager_id
I hope this clarifies to you

Similar Messages

Wanna learn to implement hierarchical data structure

I want to learn the method of handling hierarchical data in Java
For instance if there is some kind of data which contains 6 main nodes then every node contains 2 sub nodes and there are 4 nodes under the 3rd node where as the 5th one contains two more subnodes one under another.
So how will that be implemented?
Ofcourse it must be possible to implement it but how can I do the same if I do not know the depth and number of nodes and will get it during the runtime?
I had attempted to do create some thing of this kind using Turbo C++ 3.5 but after two weeks of intensive programming I was left utterly confused with innumerable pointers and pointer to pointers and pointer to a pointer to a pointers and more. At last it was me who forgot which pointer was pointing to what.

Well, just start by making a Node class. To allow Nodes to have children, make each Node have an array (or arraylist, vector, etc.) of other Nodes.
for example:
class Node{
private ArrayList<Node> children;
}Put whatever else you need in there.
You can then traverse these through methods you write, to return child nodes. If you need the Nodes to have knowledge of their parents, add a Node parent; variable in your Node class.
Essentially, keep things as simple as possible, and this will allow you to write cleaner code and also decide on the depth of the structure at runtime, like you describe.

What is hierarchical data transfer in functional location

hai,
i want to know indetail about hierarchical data transfer and horizontal data transfer in functional location.
can any one help me in this regard....
plz give information with some example if you dont mind...
thanks in advance
regards
gunnu.

Hi
From SAP HELP
Hierarchical Data Transfer
Definition
You can maintain data at a high level within a hierarchical object structure. The system will automatically transfer the data changes to the levels below that are affected.
The maintenance planner group is changed for the clarification plant described in Functional Location. The employee responsible for maintaining the master data makes the change to the master record of the highest functional location C1 and saves the changes. The system automatically makes the same change for all affected functional locations below the functional location C1, and issues a message to inform the employee of these changes.
Horizontal Data Transfer
Definition
With horizontal data transfer you can differentiate between:
Data transfer from reference location to functional location
Data transfer from functional location to installed piece of equipment
The ABC indicator of the functional location C1-B02-1 "Ventilator" is to be changed for several clarification plants.
The employee responsible for maintaining the master data makes the change in the master record of the reference functional location and saves the entries.
The system automatically makes the same change for all affected functional locations that were assigned to this reference location and for the pieces of equipment that are installed at these locations. The system then issues a message informing the employee of the changes.
Regards
thyagarajan

How to model hierarchical data?

I need a way to model hierarchical data. I have tried using an object so far, and it hasn't worked. Here is the code for the class I made: http://home.iprimus.com.au/deeps/StatsGroupClass.java. As you can see, there are 4 fields: 1 to store the name of the "group", 2 integer data fields, and 1 Vector field to store all descendants. Unfortunately, this this not seem to be working as the Vector get(int index) method returns an Object. This is the error I get:
Test.java:23: cannot resolve symbol
symbol : method getGroupName ()
location: class java.lang.Object
      echo("Primary Structure with index 0: " + data.get(0).getGroupName());
                                                        ^
1 error I figure I can't use the approach I have been using because of this.
Can anyone help me out?

Test.java:23: cannot resolve symbolsymbol : method getGroupName ()location: class java.lang.Object      echo("Primary Structure with index 0: " + data.get(0).getGroupName());                                                        ^1 errorYou need to cast the return value from get(0):
((YourFunkyClass)data.get(0)).getGroupName();Be aware that you're opening yourself up to the possibility of a runtime ClassCastException. You could consider using generics if you can guarantee that the data Vector will contain only instances of YouFunkyClass.
Hope this helps

AdvancedDataGrid - create Array (cfquery) with children for hierarchical data set

I'm trying to create an AdvancedDataGrid with a hierarchical
data set as shown below. The problem that I am having is how to
call the data from a ColdFusion remote call and not an
ArrayCollection inside of the Flex app (as below). I'm guessing
that the problem is with the CFC that I've created which builds an
array with children. I assume that the structure of the children is
the issue. Any thoughts?
Flex App without Remoting:
http://livedocs.adobe.com/labs/flex3/html/help.html?content=advdatagrid_10.html
<?xml version="1.0"?>

<mx:Application xmlns:mx="
http://www.adobe.com/2006/mxml">
<mx:Script>
<![CDATA[
import mx.collections.ArrayCollection;
[Bindable]
private var dpHierarchy:ArrayCollection= new
ArrayCollection([
{name:"Barbara Jennings", region: "Arizona", total:70,
children:[
{detail:[{amount:5}]}]},
{name:"Dana Binn", region: "Arizona", total:130, children:[
{detail:[{amount:15}]}]},
{name:"Joe Smith", region: "California", total:229,
children:[
{detail:[{amount:26}]}]},
{name:"Alice Treu", region: "California", total:230,
children:[
{detail:[{amount:159}]}
]]>
</mx:Script>
<mx:AdvancedDataGrid id="myADG"
width="100%" height="100%"
variableRowHeight="true">
<mx:dataProvider>
<mx:HierarchicalData source="{dpHierarchy}"/>
</mx:dataProvider>
<mx:columns>
<mx:AdvancedDataGridColumn dataField="name"
headerText="Name"/>
<mx:AdvancedDataGridColumn dataField="total"
headerText="Total"/>
</mx:columns>
<mx:rendererProviders>
<mx:AdvancedDataGridRendererProvider
dataField="detail"
renderer="myComponents.ChartRenderer"
columnIndex="0"
columnSpan="0"/>
</mx:rendererProviders>
</mx:AdvancedDataGrid>
</mx:Application>
CFC - where I am trying to create an Array to send back to
the Flex App
<cfset aPackages = ArrayNew(1)>
<cfset aDetails = ArrayNew(1)>
<cfloop query="getPackages">
<cfset i = getPackages.CurrentRow>
<cfset aPackages
= StructNew()>
<cfset aPackages['name'] = name >
<cfset aPackages
['region'] = region >
<cfset aPackages['total'] = total >
<cfset aDetails
= StructNew()>
<cfset aDetails['amount'] = amount >
<cfset aPackages
['children'] = aDetails >
</cfloop>
<cfreturn aPackages>

I had similar problems attempting to create an Array of
Arrays in a CFC, so I created two differents scripts - one in CF
and one in Flex - to build Hierarchical Data from a query result.
The script in CF builds an Hierarchical XML document which is then
easily accepted as HIerarchical Data in Flex. The script in Flex
loops over the query Object that is returned as an Array
Collection. It took me so long to create the XML script, and I now
regret it, since it is not easy to maintain and keep dynamic.
However, it only took me a short while to build this ActionScript
logic, which I quite like now (though it is not [
yet ] dynamic, and currently only handles two levels of
Hierarchy):
(this is the main part of my WebService result handler)....
// Create a new Array Collection to store the Hierarchical
Data from the WebService Result
var categories:ArrayCollection = new ArrayCollection();
// Create an Object variable to store the parent-level
objects
var category:Object;
// Create an Object variable to store the child-level
objects
var subCategory:Object;
// Loop through each Object in the WebService Result
for each (var object:Object in results)
// Create a new Array Collection as a copy of the Array
Collection of Hierarchical Data
var thisCategory:ArrayCollection = new
ArrayCollection(categories.toArray());
// Create a new instance of the Filter Function Class
var filterFunction:FilterFunction = new FilterFunction();
// Create Filter on the Array Collection to return only
those records with the specified Category Name
thisCategory.filterFunction =
filterFunction.NameValueFilter("NAMETXT", object["CATNAMETXT"]);
// Refresh the Array Collection to apply the Filter
thisCategory.refresh();
// If the Array Collection has records, the Category Name
exists, so use the one Object in the Collection to add Children to
if (thisCategory.length)
category = thisCategory.getItemAt(0);
// If the Array Collection has no records, the Category Name
does not exist, so create a new Object
else
// Create a new parent-level Object
category = new Object();
// Create and set the Name property of the parent-level
Object
category["NAMETXT"] = object["CATNAMETXT"];
// Create a Children property as a new Array
category["children"] = new Array();
// Add the parent-level Object to the Array Collection
categories.addItem(category);
// Create a new child-level Object as a copy of the Object
in the WebService Result
subCategory = object;
// Create and set the Name property of the child-level
Object
subCategory["NAMETXT"] = object["SUBCATNAMETXT"];
// Add the child-level Object to the Array of Children on
the parent-level Object
category["children"].push(subCategory);
// Convert the Array Collection to a Hierarchical Data
Object and use it as the Data Provider for the Advanced Data Grid
advancedDataGrid.dataProvider = new
HierarchicalData(categories);

Tree interface concept for hierarchical data creation/modification

I am designing an interface for hierarchical data creation and maintenance. The interface will have to provide all basic data modifications options:
edit an existing node, add new child/parent/sibling, as well as removing, sorting, dragging and dropping nodes around. Flex tree control is fully capable of all these functions while coding is not going to be a simple task. Has anyone worked on something like this? Any conceptual ideas?
Thanks

WOW Odie! You're awesome !! It worked like a charm, I created a view as you suggested:
CREATE OR REPLACE FORCE VIEW "VIEW_TASKS_PROJECTS_TREE" ("ID", "PARENT_ID", "NODE_NAME") AS
SELECT to_char(id) as id
, null as parent_id
, project_name as node_name
FROM eba_task_projects
UNION ALL
SELECT to_char(id)
, to_char(project_id)
, task_name
FROM eba_task_tasks;
And then I created a new tree with the defaults and customized the Tree query a bit (just added the links really):
select case when connect_by_isleaf = 1 then 0
when level = 1 then 1
else -1
end as status,
level,
"NODE_NAME" as title,
null as icon,
"ID" as value,
null as tooltip,
'f?p=&APP_ID.:22:&SESSION.::NO::P22_ID,P22_PREV_PAGE:' || "ID" || ',3' as link
from "#OWNER#"."VIEW_TASKS_PROJECTS_TREE"
start with "PARENT_ID" is null
connect by prior "ID" = "PARENT_ID"
order siblings by "NODE_NAME"
Thanks man, you saved me a lot of time and headaches :)

Hierarchical Data in Xcelsius (4 Levels)

Hello ..
is it possible to show hierarchical data for 4 Levels in Xcelsius.
Example:
first top-Down menu contains Countries. After selection of country the Diagramm should show Measures of the selected country
second Top Down for Regions should show me dynamically only the Regions of the pre selected country
Same thing with third Top Down for City and city Code ..
Is it possible ..?

Hello,
filters are very restricted. The end result of filters has to be exactly 1 row to apply them.
Category selectors offers more freedom but not enough to navigate trough 4 Hierarchies.
It s normally not the purpose of excelsius to navigate trough information. But Customers usually don t make the difference between Reporting and Dashborads.

How to delete hierarchical data?

Hello,
I have a table with hierarchical data. I want to delete data based on a condition, but maybe this condition is only present in the topmost hierarchy.
In my example I have rows identified by id and a changed_by containing the id of the row that replaced (invalidated) this row. From these I want to delete data where descr in the leaf nodes is 'A'.
Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production
DROP TABLE test_del;
CREATE TABLE test_del (
     CONSTRAINT pk_del PRIMARY KEY (id)
    ,id         NUMBER
    ,changed_by NUMBER
     CONSTRAINT fk_del
     REFERENCES test_del (id)
    ,descr      VARCHAR2(10)
INSERT INTO test_del (id,changed_by,descr)
VALUES (3,NULL,'A');
INSERT INTO test_del (id,changed_by,descr)
VALUES (2,3,'A');
INSERT INTO test_del (ID,changed_by,descr)
VALUES (1,2,NULL);
INSERT INTO test_del (id,changed_by,descr)
VALUES (6,NULL,'A');
INSERT INTO test_del (id,changed_by,descr)
VALUES (5,6,'A');
INSERT INTO test_del (id,changed_by,descr)
VALUES (10,NULL,'B');
INSERT INTO test_del (id,changed_by,descr)
VALUES (9,10,'B');
INSERT INTO test_del (id,changed_by,descr)
VALUES (8,9,'B');
COMMIT;
SELECT *
FROM    test_del
CONNECT BY PRIOR id = changed_by
START WITH descr = 'A' AND changed_by IS NULL;
        ID CHANGED_BY DESCR
         3            A
         2          3 A
         1          2
         6            A
         5          6 A
DELETE FROM test_del WHERE descr = 'A';
ORA-02292: integrity constraint (FE.FK_DEL) violated - child record found
Of course I get ORA-02292 in this case, but how can I write a correct statement that deletes the data shown by the select?
Regards
Marcus

You need to follow the hierarchy:
DELETE FROM test_del
      WHERE ROWID IN (
          SELECT ROWID
            FROM test_del
         CONNECT BY PRIOR id = changed_by
           START WITH descr = 'A'
                  AND changed_by IS NULL);

Converting a 2Dimensional Array(Hierarchical Data) into XML List/Xml/Xmlistcollection in Flex

How to convert a flat/hierarchical data (which I get from Excel as 2D Array) to XML format in Flex. The following is my Hierarchical Data:(Table form)
Asia
India
Chennai
TN
Category1
Product1
100
Asia
India
Mumbai
MH
Category1
Product1
100
Asia
India
Calcutta
CT
Category1
Product1
100
Asia
India
Calcutta
CT
Category2
Product2
200
EMEA
UK
London
LN
Category3
Product1
122
EMEA
UK
London
LN
Category3
Product2
201
EMEA
UK
Reading
RN
Category1
Product1
123
EMEA
UK
Reading
RN
Category1
Product2
455
I need to format/convert this to XML format so that I can populate that resulting xml as dataprovider to a Tree control.
I need to populate the above data into Tree component such that I get the following output:
Asia
         India
               Chennai
                   TN
                       Category1
                            Product1
                                     100
    Mumbai
                    MH
                       Category1
                             Product1
                                      100
.............goes on till last numerical data of above table

Try this into json then to xml. I did similar one using PHP and JSON.

Hierarchical data structure

I am trying to represent the following data structure in hierarchical format ---- but I am not going to use any swing components, so jtree and such are out, and xml is probably out. I was hoping some form of collection would work but I can't seem to get it!
Example Scenario
Football League --- Football Team -- Player Name
West
------------------------------Chiefs
-------------------------------------------------------------xyz
-------------------------------------------------------------abc
-------------------------------------------------------------mno
------------------------------Broncos
------------------------------------------------------------asq
------------------------------------------------------------daff
This hierarchical structure has a couple of layers, so I don't know how I can feasibly do it. I have tried to look at making hashmaps on top of each other so that as I iterate thru the data, I can check for the existence of a key, and if it exists, get the key and add to it.
Does anyone know a good way to do this? Code samples would be appreciated!!!
Thank you!

Hi Jason,
I guess you wouldn't want to use Swing components or JTree unless your app has some GUI and even then you would want to look for some other structure than say JTree to represent your data.
You have got plenty options one is that of using nested HashMaps. You could just as well use nested Lists or Arrays or custom objects that represent your data structure.
I don't know why you should exclude XML. There is the question anyway how you get your data in your application. Is a database the source or a text file? Why not use XML since your data seems to have a tree structure anyway and XML seems to fit the bill.
An issue to consider in that case is the amount of data. Large XML files have performance problems associated with them.
In terms of a nice design I would probably do something like this (assuming the structure of your data is fixed):
public class Leagues {
    private List leagues = new ArrayList();
    public FootballLeague getLeagueByIndex(int index) {
        return (FootballLeague)leagues.get(index);
    public FootballLeague getLeagueByName(String name) {
        // code that runs through the league list picking out the league with the given name
    public void addLeague(FootballLeague l) {
        leagues.add( l );
}Next you define a class called FootballLeague:
public class FootballLeague {
    private List teams = new ArrayList();
    private String leagueName;
    public FootballTeam getTeamByIndex(int index) {
        return (FootballTeam)teams.get( index );
    public FootballTeam getTeamByName(String name) {
        // code that runs through the team list picking out the team with the given name
    public void addTeam(FootballTeam t) {
        teams.add( t );
    public void setTeamName(String newName) {
        this.name = newName;
    public String getTeamName() {
        return this.name;
}Obviously you will continue defining classes for Players next following that pattern. I usually apply that kind of structure for complex hierarchical data. Nested lists would be just as fine, but dealing with nested lists rather than a simple API for you data structures can be a pain (especially if you have many levels in your hierarchy);
Hope that helps.
The Dude

Hierarchical data maintainance

Hello,
I have a table (Parent - Child).
There is a requirement to maintain this table, thats the hierarchy of the oraganisation.
So, every quater they will be updating the table.
They will be importing the data through an excel and in that excel there are 3 action items,
=> Insert, Update and Delete (logical delete).
CREATE TABLE PARENT_CHILD_TBL
   ( "ID" VARCHAR2(6 BYTE) NOT NULL ENABLE,
"ID_DESC" VARCHAR2(200 BYTE),
"ID_LEVEL" VARCHAR2(200 BYTE),
"PARENT_ID" VARCHAR2(200 BYTE)
For Update:
Any ideas, What all validation can come for an updation of an hierarchical data in general.
Like
= how to derive the level value at database side when the id is updated to some other level.
= How to maintain the relation.
A -> B -> D ( A is the grand parent here).
A -> C
eg: if B is updated as parent node of A, then we should throw error (cyclic data).
Any more validations for hierarchical data, anybody can suggest and the way to go for it will be helpful.
Thanks !!

Hi,
You can use the LEVEL psudo-column in a CONNECT BY query:
SELECT p.*
,       LEVEL
,       CASE
            WHEN TO_CHAR (LEVEL, 'TM') = id_level
            THEN 'OK'
            ELSE ' *** BAD ***'
END     AS flag
FROM    parent_child_tbl p
START WITH parent_id = '0000'
CONNECT BY parent_id = PRIOR id
Output from the sample data you posted (where all the level_ids are correct):
                          PARENT
ID    ID_DESC    ID_LEVEL _ID            LEVEL FLAG
A     ROOT       1        0000               1 OK
B     CHILD1     2        A                  2 OK
D     SUB CHILD1 3        B                  3 OK
C     CHILD2     2        A                  2 OK
If you only want to see the rows where id_level is wrong, then you can use LEVEL in a WHERE clause.
Maybe you shouldn't bother manually entering id_level at all, and just have a MERGE statement populate that column after all the other data is entered.
Why is the id_level column defined as a VARCHAR2, rather than a NUMBER?
Given that it must be a VARCHAR2, why does it need to be 200 bytles long?

Hierarchical data in VizPacker

Hi,
I am creating an extension of tree layout for lumira. I have implemented d3 part of it, but i am facing issue while using same in vizpacker. I am uploading data from csv file. Inside my d3 code i am recieving csv data as array of json objects, i am using d3.nest() to create hierarchical data and this way i am able to draw my graph but with vizpacker, format of data is different.
[{"Set 1":["Population over 60","India","2002"],"NumericMeasure":["7.01"]},{"Set 1":["Population under 15","India","2002"],"NumericMeasure":["33.42"]},{"Set 1":["Population over 60","India","2003"],"NumericMeasure":["7.08"]},{"Set 1":["Population under 15","India","2003"],"NumericMeasure":["33.03"]},{"Set 1":["Population over 60","India","2004"],"NumericMeasure":["7.15"]},{"Set 1":["Population under 15","India","2004"],"NumericMeasure":["32.62"]}]
I want to nest elements first by country and then by Indicators followed by NumericMeasure like this
{"country": "India","children": [{"Indicator": "population under 15","children": [{"year": "2002","numericMeasure": "30.1"},{"year": "2003","numericMeasure": "31.5"},{
"year": 2004,"numericMeasure": "32.9"}]},{"Indicator": "population over 60","children": [{"year": "2002","numericMeasure": "7.1"},{"year": "2003","numericMeasure": "7.5"},{"year": 2004,"numericMeasure": "7.0"
How should i do it? Thanks in advance!
Regards,
Ashish.

Hey Ashish,
I'm currently in an [R] headspace, so coming back to JS/VizPacker may require some additional time to go through your code with you.
As an employee I would highly recommend that you revert internally, as there are some great resources for you (be sure to check out the JAM page; Jan should be able to guide you) - and then you can come back and post the solution to your question.
This example in d3 is pretty straight-forward though:
var data = [
{ "name" : "Level 2: A", "parent":"Top Level" },
{ "name" : "Top Level", "parent":"null" },
{ "name" : "Son of A", "parent":"Level 2: A" },
{ "name" : "Daughter of A", "parent":"Level 2: A" },
{ "name" : "Level 2: B", "parent":"Top Level" }
// *********** Convert flat data into a nice tree ***************
// create a name: node map
var dataMap = data.reduce(function(map, node) {
map[node.name] = node;
return map;
// create the tree array
var treeData = [];
data.forEach(function(node) {
// add to parent
var parent = dataMap[node.parent];
if (parent) {
// create child array if it doesn't exist
(parent.children || (parent.children = []))
// add node to child array
.push(node);
} else {
// parent is null or missing
treeData.push(node);
// ************** Generate the tree diagram *****************
var margin = {top: 20, right: 120, bottom: 20, left: 120},
width = 960 - margin.right - margin.left,
height = 500 - margin.top - margin.bottom;
var i = 0;
var tree = d3.layout.tree()
.size([height, width]);
var diagonal = d3.svg.diagonal()
.projection(function(d) { return [d.y, d.x]; });
var svg = d3.select("body").append("svg")
.attr("width", width + margin.right + margin.left)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
root = treeData[0];
update(root);
function update(source) {
// Compute the new tree layout.
var nodes = tree.nodes(root).reverse(),
links = tree.links(nodes);
// Normalize for fixed-depth.
nodes.forEach(function(d) { d.y = d.depth * 180; });
// Declare the nodes…
var node = svg.selectAll("g.node")
.data(nodes, function(d) { return d.id || (d.id = ++i); });
// Enter the nodes.
var nodeEnter = node.enter().append("g")
.attr("class", "node")
.attr("transform", function(d) {
return "translate(" + d.y + "," + d.x + ")"; });
nodeEnter.append("circle")
.attr("r", 10)
.style("fill", "#fff");
nodeEnter.append("text")
.attr("x", function(d) {
return d.children || d._children ? -13 : 13; })
.attr("dy", ".35em")
.attr("text-anchor", function(d) {
return d.children || d._children ? "end" : "start"; })
.text(function(d) { return d.name; })
.style("fill-opacity", 1);
// Declare the links…
var link = svg.selectAll("path.link")
.data(links, function(d) { return d.target.id; });
// Enter the links.
link.enter().insert("path", "g")
.attr("class", "link")
.attr("d", diagonal);
(see the full example here: D3.js tree diagram generated from 'flat' data)
If you haven't done so already, I would highly recommend you go through Matt Lloyd's tutorials for the VizPacker (Part 1, Part 2, Part 3).
What is the d3 example that you are looking at?
Can you confirm that your method works externally in HTML - and that you're not getting your intended output from the Lumira side, please?
//bijan

Convert Non-Hierarchical data into Hierarchical data for Tree creation

Hi guys,
I've been trying to figure this out for about two entire days now and I'm still stuck and see no possible solution which doesn't involve a new table creation.
Thing is that I want to create a Tree to navigate through Projects and Tasks, I'm using the "Task Manager" demo app, which I have customized a bit to fit my needs.
Basically I cannot create the Tree 'cause the relation between Projects and Tasks is not a hierarchical relation, it's a 1:N relation as this:
__Projects__
ID (PK)
PROJECT_NAME
___Tasks___
ID (PK)
PROJECT_ID (FK references Projects.ID)
So what I need to do is "force" that 1:N relation to a a hierarchical relation by creating a query (view) that joins the two tables into a single one and that have 2 columns I can use as ID and PARENT_ID for the tree creation.
This is the Data Model:
CREATE TABLE "EBA_TASK_PROJECTS"
(     "ID" NUMBER,
     "PROJECT_NAME" VARCHAR2(255),
     "CREATED_ON" DATE NOT NULL ENABLE,
     "CREATED_BY" VARCHAR2(255) NOT NULL ENABLE,
     "UPDATED_ON" DATE,
     "UPDATED_BY" VARCHAR2(255),
     "FLEX_01" VARCHAR2(4000),
     "FLEX_02" VARCHAR2(4000),
     "FLEX_03" VARCHAR2(4000),
     "FLEX_04" VARCHAR2(4000),
     "FLEX_05" VARCHAR2(4000),
     "PARENT_ID" NUMBER,
     "IS_ACTIVE" VARCHAR2(1),
     "DESCRIPTION" VARCHAR2(4000),
     CONSTRAINT "EBA_TASK_PROJECTS_ACTIVE_CC" CHECK (is_active in ('Y', 'N')) ENABLE,
     CONSTRAINT "EBA_TASK_PROJECTS_PK" PRIMARY KEY ("ID") ENABLE
) ;ALTER TABLE "EBA_TASK_PROJECTS" ADD CONSTRAINT "EBA_TASK_PROJECTS_FK" FOREIGN KEY ("PARENT_ID")
     REFERENCES "EBA_TASK_PROJECTS" ("ID") ON DELETE CASCADE ENABLE;
CREATE TABLE "EBA_TASK_TASKS"
(     "ID" NUMBER NOT NULL ENABLE,
     "PROJECT_ID" NUMBER NOT NULL ENABLE,
     "TASK_PRIORITY" VARCHAR2(400) NOT NULL ENABLE,
     "TASK_DIFFICULTY" VARCHAR2(400) NOT NULL ENABLE,
     "TASK_NAME" VARCHAR2(4000) NOT NULL ENABLE,
     "TASK_DETAILS" VARCHAR2(4000),
     "CREATED_ON" DATE NOT NULL ENABLE,
     "COMPLETED" DATE,
     "CREATED_BY" VARCHAR2(400) NOT NULL ENABLE,
     "STATUS" VARCHAR2(4000),
     "UPDATED_ON" DATE,
     "STARTED" DATE,
     "TASK_PREDEFINED_ID" NUMBER,
     "UPDATED_BY" VARCHAR2(255),
     "USER_NAME" VARCHAR2(255) NOT NULL ENABLE,
     "FLEX_01" VARCHAR2(4000),
     "FLEX_02" VARCHAR2(4000),
     "FLEX_03" VARCHAR2(4000),
     "FLEX_04" VARCHAR2(4000),
     "FLEX_05" VARCHAR2(4000),
     "PERCENTAGE" NUMBER,
     CONSTRAINT "EBA_TASK_TASKS_PK" PRIMARY KEY ("ID") ENABLE
) ;ALTER TABLE "EBA_TASK_TASKS" ADD CONSTRAINT "EBA_TASK_TASKS_PROJECTS_FK" FOREIGN KEY ("PROJECT_ID")
     REFERENCES "EBA_TASK_PROJECTS" ("ID") ON DELETE CASCADE ENABLE;
I'm using APEX4.0
That's pretty much it guys, hope you can help me with this. I'm really stuck on this and am about to give up.

WOW Odie! You're awesome !! It worked like a charm, I created a view as you suggested:
CREATE OR REPLACE FORCE VIEW "VIEW_TASKS_PROJECTS_TREE" ("ID", "PARENT_ID", "NODE_NAME") AS
SELECT to_char(id) as id
, null as parent_id
, project_name as node_name
FROM eba_task_projects
UNION ALL
SELECT to_char(id)
, to_char(project_id)
, task_name
FROM eba_task_tasks;
And then I created a new tree with the defaults and customized the Tree query a bit (just added the links really):
select case when connect_by_isleaf = 1 then 0
when level = 1 then 1
else -1
end as status,
level,
"NODE_NAME" as title,
null as icon,
"ID" as value,
null as tooltip,
'f?p=&APP_ID.:22:&SESSION.::NO::P22_ID,P22_PREV_PAGE:' || "ID" || ',3' as link
from "#OWNER#"."VIEW_TASKS_PROJECTS_TREE"
start with "PARENT_ID" is null
connect by prior "ID" = "PARENT_ID"
order siblings by "NODE_NAME"
Thanks man, you saved me a lot of time and headaches :)

Creating custom hierarchical data provider

Hi,
I'm trying to create a custom dataprovider for a 3rd party
chart control. As far as I can tell, it works just like any
Flex-provided hierarchical dataprovider control. My problem doesn't
have to do with the control directly, as I haven't yet even tried
to interface my dataprovider with their control (that's why I'm
posting here). I'm having a lot of troubling figuring out how to
implement IHierarchicalData and IHierarchicalCollectionView (or
figuring out what to extend and override to give me the
functionality). The documentation doesn't seem to be detailed
enough to help me .
I can't use a normal XML dataprovider because the XML I have
contains child elements that are data, so I can't just use the
hierarchy of the XML itself. I need to process the XML in some way
using code that actually understands its structure. I intend to
process this into a class that implements IHierarchicalData. The
documentation is really vague on what the results of a call to
getChildren() returns (and how the calling code then breaks the
children apart so it can call getData() on each), but I was able to
figure that out by looking at the source for the chart control I'm
using (it appears to expect an ArrayCollection... why isn't the
IHierarchicalData interface typed as such?). My biggest problem is
understanding the IHierarchicalCollectionView. It has methods to
add and remove child nodes, but I don't see how it's possible for
it to do that. It only has a reference to an IHierarchicalData,
which provides no methods to perform those operations. When I wrap
my IHierarchicalData in the default HierarchicalCollectionView
object (which is just what the chart does, as far as I can tell)
and use methods like addChild(), I get a null reference error, as
mentioned in this stack trace snippet:
Error #1009: Cannot access a property or method of a null
object reference.
at mx.collections::HierarchicalCollectionView/addChild()
I believe I need the HierarchicalCollectionView (or to extend
a class that implements the IHierarchicalCollectionView interface
or implement it myself) because I need to use its functions to
modify my tree structure so that when I change the data, the chart
will update. Is this a correct assumption? If so, how do I use
those functions on the HierarhicalCollectionView? What is it doing
internally? I don't understand how it can be manipulating the tree
in a type-safe manner having only an IHierarchicalData reference to
work with, and if it's doing it in a non-typesafe manner, I need to
know what methods it's calling on my tree or node objects, which
don't appear to be documented in the docs for
IHierarchicalCollectionView.
If I'm totally off-base in the best way to accomplish my
goal, please let me know. I'd also appreciate any information you
could give me, such as info on the hierarchy interfaces that goes
beyond the docs. Some source code for HierarchicalCollectionView
would be super helpful (only for reverse engineering; it should
really be documented somewhere), but I haven't been able to find
any. Isn't it open source?
Thank you very much for any help you can provide.

SAP Note 746227 has addressed this issue. I will close this question.

Posting hierarchical data

Hi,
Can any body give me give suggestions of how I can implement the Hierarchical posting of data into database.
For ex. I have a XML document which contains records for Dept. and Emp tables. I want to post these datagrams into respective tables.
<ROWSET>
<ROW>
<DEPTNO>10</DEPTNO>
<LOC>New York</LOC>
<NAME>Accounting</NAME>
<tname>DEPT</tname>
</ROW>
<ROW>
<EMPNO>3456</EMPNO>
<ENAME>SMITH</ENAME>
<MGR>5677</MGR>
<tname>EMP</tname>
</ROW>
</ROWSET>
here tname identifies the table into which data will go and we don't which tables info. the xml document will have and the relation ship between those tables.
I am looking for more generalized mechanism to hadle this. I mean the xml document may contain more than two tables info. and may contain in random order.
Note:
I think if we get the hierarchy from all_constraints view we could solve the problem.
Thanks in adv.
Hari.

For a totally generic solution that's driven off information in ALL_TABLES, ALL_TAB_COLUMNS, and ALL_CONS_COLUMNS, and ALL_CONSTRAINTS, you'd need to author it yourself unfortunately.
If you're doing it in PL/SQL, you might find some useful constraint-walking code in the DBXML package that is part of our sample code we put on the web a long time ago called the "PLSXML Examples and Utilities".
Specifically, the DBXML.SQL package has some generic procedures for retrieving the inbound and outbound constraints on a table.
http://technet.oracle.com/tech/xml/info/index2.htm?Info&plsxml/xml4plsql.htm

Hierarchical DATA?

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