Getting a single value from an array collection

I have an array collection that was created from an XML file
through the HTTP Service. One of the nodes in the XML file was
product_number and I can display all of the items in this node in a
datagrid so I know the array has the name of the node in it.
I would like to be able to retrieve a single item from the
array collection (e.g. a product_number = to xxx) and assign it to
a variable.
I would also like to be able to assign all the items in a
particlur column (e.g. all product_numbers) to separate variables
at the same time.
Any help would be greatly appreciated.

You can apply a filterFunction.
Or you can do it the brute force way: loop over the elements,
and test for the value you want.
As far as putting values into variables, I am not sure what
you want.
And this is not a Flex Builder question and should go in the
General Discussion forum.
Tracy

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Get distinct values from plsql array

Hi,
I have declared a variable as below in plsql proc.
type t_itemid is table of varchar2(10);
inserted set of items in to this using a program
now i want distinct values from that array how can i get it.

I am using 9i so i cannot use set operator and more over my problem is that i am declaring the variable inside the plsql block . when i tried i am getting the below errors:
SQL> r
1 declare
2 type t_type is table of varchar2(10);
3 v_type t_type;
4 begin
5 v_type := t_type('toys','story','good','good','toys','story','dupe','dupe');
6 for i in (select column_value from table(v_type)) loop
7 dbms_output.put_line(i.column_value);
8 end loop;
9* end;
for i in (select column_value from table(v_type)) loop
ERROR at line 6:
ORA-06550: line 6, column 41:
PLS-00642: local collection types not allowed in SQL statements
ORA-06550: line 6, column 35:
PL/SQL: ORA-22905: cannot access rows from a non-nested table item
ORA-06550: line 6, column 10:
PL/SQL: SQL Statement ignored
ORA-06550: line 7, column 22:
PLS-00364: loop index variable 'I' use is invalid
ORA-06550: line 7, column 1:
PL/SQL: Statement ignored

Get value from the array based on the HashCode

public static void runJoin(int[][] t1,int[][] t2)
     PrintWriter out=null;
     int rows = 1000;
     int cols = 7;
     int [][] myTable3 = new int[rows][cols];
     int x = 0;
     System.out.print("Running HashJoin:Method loads the "+
     "smaller table in the memory and applies a hashing function "+
     "to common column and stores it in another table. "+
     "The larger table is then read from the file. "+
     "The same hashing function is applied to Col n of the table and a       matching record in the first table is looked up. A match will create a row in Table 3. ");
//Apply hashing function to smaller table and store it in the memory.
          Integer[] It2 = new Integer[t2.length];
          int [] hashCodest2 = new int[t2.length];
          Hashtable ht = new Hashtable();
          for(int i =0; i <t2.length;i++){
               It2[i] = new Integer(t2[0]);
               hashCodest2[i] = It2[i].hashCode();
               ht.put(new Integer(hashCodest2[i]),It2[i]);
          //Larger table get hashcodes
          Integer It1[] = new Integer[t2.length];
          int [] hashCodest1 = new int[t2.length];
          for(int j =0; j <t1.length;j++){
               It1[j] = new Integer(t1[j][4]);
               hashCodest1[j] = It1[j].hashCode();               }
          //Based on the hashcode get the value from the Table2;
          try{
out = new PrintWriter( new FileOutputStream( "c:\\HashJoinTable.txt" ) );
          Enumeration e = ht.keys();
               while(e.hasMoreElements())
//How do I get the value from the array based on the HashCode? Do I need to do a loop here???
hashCodes1.get(e.nextElement());
          }catch(Exception e){}

ok I got it......
          //Apply hashing function to smaller table and store it in the memory.
          Integer[] It2 = new Integer[t2.length];
          int [] hashCodest2 = new int[t2.length];
          Hashtable ht = new Hashtable();
          for(int i =0; i <t2.length;i++){
               It2[i] = new Integer(t2[0]);
               hashCodest2[i] = It2[i].hashCode();
               ht.put(new Integer(hashCodest2[i]),It2[i]);
          //Larger table get hashcodes and compare
          Integer It1[] = new Integer[t2.length];
          int [] hashCodest1 = new int[t2.length];
          Hashtable ht2 = new Hashtable();
          for(int j =0; j <t1.length;j++){
               It1[j] = new Integer(t1[j][4]);
               hashCodest1[j] = It1[j].hashCode();
               ht2.put(new Integer(hashCodest1[j]),It1[j]);
          //Based on the hashcode get the value from the Table2;
          try{
out = new PrintWriter( new FileOutputStream( "c:\\HashJoinTable.txt" ) );
          Enumeration e = ht.keys();
          Integer t3[] = new Integer[t2.length];
               while(e.hasMoreElements())
                    t3[x] = (Integer) ht2.get(e.nextElement());
                    x++;
          }catch(Exception e){}

Finding the smallest value from an array

Hi there :)
I started learning Java a few days ago and have now run into my first problem :p
I am using Netbeans on Mac OS X.
I need to find the smallest value from an array. So far I've had no luck. Any suggestions would be fantastic.
The code so far:
* Math Problems
* Created on May 4, 2007, 10:54 AM
* PROJECT 1: - IN PROGRESS
* Create a program that allows you to create an integer array of 18 elements with the following values
* 3, 2, 4, 5, 6, 4, 5, 7, 3, 2, 3, 4, 7, 1, 2, 0, 0, 0
* - The program computes the sum of elements 0 to 14 and stores it in element 15                              // COMPLETED
* - The program computes the average and stores it in element 16                                              // COMPLETED
* - The program finds the smallest value from the array and stores it in element 17
* PROJECT 2: - TO DO
* Write a program that accepts from the command line and prints them out. Then use a for loop to print
* the next 13 numbers in the sequence where each number is the sum of the previous two. FOR EXAMPLE:
* - input>java prob2 1 3
* - output>1 3 4 7 11 18 29 47 76 123 322 521 843 1364
* PROJECT 3: - TO DO
* Write a program that accepts from the command line two numbers in the range from 1 to 40. It then
* compares these numbers against a single dimension array of five integer elements ranging in value
* from 1 to 40. The program displays the message BINGO if the two inputted values are found in the array
* element. FOR EXAMPLE:
* - input>java prob3 3 29
* - output>Your first number was 3
* -        Your second number was 29
* -        Its Bingo! // This message if 3 and 29 are found in the array
* -        Bokya!      // This message if 3 and 29 are not found in the array
* -        The array was 7 5 25 5 19 30
* PROJECT 3 EXTENSION: - OPTIONAL
* Generate the array of 5 unique integers using random numbers
package mathproblems;
* @author Mohammad Ali
public class Main {
    /** Creates a new instance of Main */
    public Main() {
     * @param args the command line arguments
    public static void main(String[] args) {
        int A[]={3,2,4,5,6,4,5,7,3,2,3,4,7,1,2,0,0,0};
        int O = A.length - 3;
        int B = A[0] + A[1] + A[2] + A[3] + A[4] + A[5] + A[6] + A[7] + A[8] + A[9] + A[10] + A[11] + A[12] + A[13] + A[14];
        A[15] = B; // Stores the sum of the integers in A[15]
        int C = B / O;
        A[16] = C; // Computes and stores the average in A[16]
        int D = 101;
            if (A[0] < A[1]) { D = A[0]; }
            else { D = A[1]; }
            if (A[1] < A[2]) { D = A[1]; }
            else { D = A[2]; }
        System.out.println("There are " + O + " numbers in the Array");
        System.out.println("Those numbers add up to " + B + ".");
        System.out.println("The average of those numbers is " + C + ".");
        System.out.println("The smallest value in the array is " + D + ".");
}The code is incomplete, but it works so far. The problem is I know there must be an easier way. SAVE ME :)

OK :)
Just thought I should show you the output as to help anyone else with the same problem:
* Math Problems
* Created on May 4, 2007, 10:54 AM
* PROJECT 1: - IN PROGRESS
* Create a program that allows you to create an integer array of 18 elements with the following values
* 3, 2, 4, 5, 6, 4, 5, 7, 3, 2, 3, 4, 7, 1, 2, 0, 0, 0
* - The program computes the sum of elements 0 to 14 and stores it in element 15                              // COMPLETED
* - The program computes the average and stores it in element 16                                              // COMPLETED
* - The program finds the smallest value from the array and stores it in element 17                           // COMPLETED
* PROJECT 2: - TO DO
* Write a program that accepts from the command line and prints them out. Then use a for loop to print
* the next 13 numbers in the sequence where each number is the sum of the previous two. FOR EXAMPLE:
* - input>java prob2 1 3
* - output>1 3 4 7 11 18 29 47 76 123 322 521 843 1364
* PROJECT 3: - TO DO
* Write a program that accepts from the command line two numbers in the range from 1 to 40. It then
* compares these numbers against a single dimension array of five integer elements ranging in value
* from 1 to 40. The program displays the message BINGO if the two inputted values are found in the array
* element. FOR EXAMPLE:
* - input>java prob3 3 29
* - output>Your first number was 3
* -        Your second number was 29
* -        Its Bingo! // This message if 3 and 29 are found in the array
* -        Bokya!      // This message if 3 and 29 are not found in the array
* -        The array was 7 5 25 5 19 30
* PROJECT 3 EXTENSION: - OPTIONAL
* Generate the array of 5 unique integers using random numbers
package mathproblems;
* @author Mohammad Ali
import java.util.Arrays;
public class Main {
    /** Creates a new instance of Main */
    public Main() {
     * @param args the command line arguments
     public static void main(String[] args) {
              int A[]={3,2,4,5,6,4,5,7,3,2,3,4,7,1,2,0,0,0};
          Arrays.sort(A);
          System.out.println("The smallest value in the array is " + A[0] + ".");
          int num = A.length;
          System.out.println("There are " + num + " values in the Array.");
          int sum = 0;
          for (int i = 0; i < A.length; i++) {
               sum+=A;
          System.out.println("Those numbers add up to " + sum + ".");
          double d = (double)sum/num;
          System.out.println("The average value of those numbers is " + d + ".");
What Iearned:
1) How to create for loops properly
2) How to import java.util.Arrays ( =D )
3) How to get a more accurate average using double instead of int
4) This forum is the best and has very helpful people 24/7 ( =D)
Thanks Again,
Mo.

How to get edited row values from ADF table?

JDev 11.
I have a table which is populated with data from Bean.
I need to save changes after user make changes in any table cell. InputText is defined for table column component.
I have defined ValueChangeListener for inputText field and AutoSubmit=true. So when user change value in inputText field, method is called:
public void SaveMaterial(ValueChangeEvent valueChangeEvent) {
getSelectedRow();
SaveMaterial(material);
This method should call getSelectedRow which take values from selected table row and save them into object:
private Row getSelectedRow(){
RichTable table = this.getMaterialTable();
Iterator selection = table.getSelectedRowKeys().iterator();
while (selection.hasNext())
Object key = selection.next();
table.setRowKey(key);
Object o = table.getRowData();
material = (MATERIAL) o;
System.out.println("Selected Material Desc = "+material.getEnumb());
return null;
Problem is that getSelectedRow method doesnt get new (edited) values, old values are still used.
I have tried to use ActiveButton with same method and it works fine in that case. New values are selected from active row and inserted into object.
JSF:
<af:table var="row" rowSelection="single" columnSelection="single"
value="#{ManageWO.material}" binding="#{ManageWO.materialTable}">
<af:column sortable="false" headerText="E-number">
<af:inputText value="#{row.enumb}" valueChangeListener="#{ManageWO.SaveMaterial}" autoSubmit="true"/>
</af:column>
<af:column sortable="false" headerText="Description">
<af:inputText value="#{row.desc}" valueChangeListener="#{ManageWO.SaveMaterial}" autoSubmit="true"/>
</af:column>
</af:table>
<af:activeCommandToolbarButton text="Save" action="#{ManageWO.EditData}"/>
What is a correct place from where save method should be called to get new (edited) values from ADF table?
Thanks.

Did you look into the valueChangeEvent?
It has oldValue and newValue attributes.
public void SaveMaterial(ValueChangeEvent valueChangeEvent) {
Object oldVal = valueChangeEvent.getOldValue();
Object newVal = valueChangeEvent.getNewValue();
// check if you see what you are looking for.....
getSelectedRow();
SaveMaterial(material);
}Timo

Getting all the values from a JList

Hi,
I want to get all the values from a JList and store it into an array. Any method is available to perform this task? Pls help me out with this task.

Use getModel() on the list to get the ListModel and then call getSize() and getElementAt(int) to loop over the elements
HTH
Mike

How to get the Node Value from XmlValue result?

Hi ,
I am not able to get the Node Value from the result. In my XQuery im selecting till a Node, if i change my query as
collection('PhoneBook')/phone_book/contact_person/address/string()", qc);
im getting the node value, but here the problem is its not a Node so i cannot get the Node name.
So how can i get the Node Name and Node value together?
any help please ????
XML :
<?xml version="1.0" encoding="UTF-8"?>
<phone_book>
<contact_person>
<name>
<first_name>Michael</first_name>
<second_name>Harrison</second_name>
</name>
<address city="yyyyy" pincode="600017" state="xxxxx">
176 Ganesan street, Janakinagar, alwarthirunagar
</address>
</contact_person>
<phone_number type="mobile">9881952233</phone_number>
<phone_number type="home">044-24861311</phone_number>
<phone_number type="office">080-12651174</phone_number>
</phone_book>
Code:
XmlQueryContext qc = manager.createQueryContext();
XmlResults rs = manager.query
("collection('PhoneBook')/phone_book/contact_person/address", qc);
while(rs.hasNext()){
XmlValue val = rs.next();
System.out.println(val.getNodeName() + " = [ " + val.getNodeValue() + " ] ");
Output
address = [ ]

You are right, this seemed un-intuitive to me too, but I finally understood how it's done.
The "value" of a node is actually the total amount of text that is not contained in any of the node's child nodes (if any). So a node with child nodes can still have text value.
To get the 'value' of an element node, you must therefore concatenate the values of all children of type "XmlValue::TEXT_NODE", of that node. Try it.
In your example, the <address> node has no child elements, my guess is that BDB XML stores the address string "176 Ganesan street, Janakinagar, alwarthirunagar" inside a child node of <address> node (of type XmlValue::TEXT_NODE) because you wrote the string on a separate line.

Removing a value from an array

I have searched the forums, and found many post about this, but with different variances.
i have an array, where if a user passes an argument that already exists in the array, it will remove that value from the array. when i run the code below i get a boolean exception. i "think" my thinking is correct, but i cannot seem to put it into code terms (HAH! thats a first eh?).
what exactly be the difference to setting the position to 0 or to null?
public void remove(int lessNum) throws NotFoundException {
   for( int i=0;i<this.occupied.length;i++) {
        if(occupied.equals(lessNum)
     occupied[i] = null;
     else
     throw new NotFoundException();
}//end for
}//end remove
this is the exception i get: boolean cannot be dereferenced
                    if(occupied[i].equals(lessNum)
^
Thanks,
J

Hi.
(You have a few typos in your code, but I'm assuming that's because you typed it in again when you sent your posting rather than copying and pasting it. Your compilation error is also not consistent with the code, but I'll take a guess at what is going on)
There are a number of things that are strange about the code example.
1. It looks like your 'occupied' field is a boolean[] (the compilation error indicates that this is the case). That means each element of occupied is a primitive boolean, not a reference. Therefore trying to dereference it makes no sense. This is what the compiler error is telling you. Note that this is not an exception.
2. Now looking at the intent of what I think you're trying to do... I think you are trying to determine if element i of the 'occupied' array is equal to the parameter 'lessNum'. This is nonsensical since the elements of 'occupied' are booleans and lessNum is an int.
3. Finally, trying to set an element of 'occupied' to null, doesn't make sense because the elements of 'occupied' are not references, but primitives.
Regarding your question about the difference between setting something to 0 or null: I assume you come from a C or C++ background where 0 and null are the same thing. In Java, null is not equivalent to 0 but is instead a special value for a variable of reference type that means that the variable is not currently referring to anything. In C and C++ if a pointer has the value 'null' or 'zero' it simply means that any attempt to dereference it will mean an attempt to look for an object at memory address 0 which will usually result in unimaginable horrors (alright, it's not that bad).
Regards,
Lance
Lance Walton - [email protected]
Team In A Box - Software without Tragedy
http://www.teaminabox.co.uk

How can i get the all values from the Property file to Hashtable?

how can i get the all values from the Property file to Hashtable?
ok,consider my property file name is pro.PROPERTIES
and it contain
8326=sun developer
4306=sun java developer
3943=java developer
how can i get the all keys & values from the pro.PROPERTIES to hashtable
plz help guys..............

The Properties class is already a subclass of Hashtable. So if you have a Properties object, you already have a Hashtable. So all you need to do is the first part of that:Properties props = new Properties();
InputStream is = new FileInputStream("tivoli.properties");
props.load(is);

Get all the values from a multiple select in a multipart form

Hi there!
I am using a form with enctype="multipart/form-data" in order to upload files from the form.
I have read this page: http://commons.apache.org/fileupload/using.html and everything works well for my form.
The only problem is that I can't get all the values from a "multiple select" html object. I get only one value.
Using servlets I have used this method:
public java.lang.String[] getParameterValues(java.lang.String name) But now I have enctype="multipart/form-data" in my form and I can't use this way...
Is there a way to get all the values of a multi-valued parameter?
Thanks a lot!
Stefano

Hi
I have got solution for this problem so, I am listing here logic
assume tag name of html
<select name="moption" multiple="multiple">
iterate it in as
String moption="";
boolean cnt=true;
while(itr.hasNext())
FileItem fi=(FileItem)itr.next();
if(fi.isFormField())
if(fi.getFieldName().equals("moption"))
if(cnt==true)
moption=fi.getString();
cnt=false;
else
moption=moption+","+fi.getString();
If wants more help then mail me your problem
at [email protected]
Thanks!
Anand Shankar
Edited by: AnandShankar on 6 Nov, 2009 12:54 PM

How to get all the values from the dropdown menu

How to get all the values from the dropdown menu
I need to be able to extract all values from the dropdown menu; I know how to get all those values as a string, but I need to be able to access each item; (the value in a dropdown menu will change dynamically)
How do I get number of item is selection dropdown?
How do I extract a ?name? for each value, one by one?
How do I change a selection by referring to particular index of the item in a dropdown menu?
Here is the Path to dropdown menu that I'm trying to access (form contains number of similar dropdowns)
RSWApp.om.GetElementByPath "window(index=0).form(id=""aspnetForm"" | action=""advancedsearch.aspx"" | index=0).formelement[SELECT](name=""ctl00$MainContent$hardwareBrand"" | id=""ctl00_MainContent_hardwareBrand"" | index=16)", element
Message was edited by: testtest

The findElement method allows various attributes to be used to search. Take the following two examples for the element below:
<Select Name=ProdType ID=testProd>
</Select>
I can find the element based on its name or any other attribute, I just need to specify what I am looking for. To find it by name I would do the following:
Set x = RSWApp.om.FindElement("ProdType","SELECT","Name")
If I want to search by id I could do the following:
Set x = RSWApp.om.FindElement("testProd","SELECT","ID")
Usually you will use whatever is available. Since the select element has no name or ID on the Empirix home page, I used the onChange attribute. You can use any attribute as long as you specify which one you are using (last argument in these examples)
You can use the FindElement to grab links, text boxes, etc.
The next example grabs from a link on a page
Home
Set x = RSWApp.om.FindElement("Home","A","innerText")
I hope this helps clear it up.

How to get the return values from a web page

Hi all :
how to get the return values from a web page ? I mean how pass values betwen webflow and web page ?
thank you very much
Edited by: jingying Sony on Apr 15, 2010 6:15 AM
Edited by: jingying Sony on Apr 15, 2010 6:18 AM

Hi,
What kind of web page do you have? Do you have possibility to for example make RFCs? Then you could trigger events (with parameters that could "return" the values) and the workflow could react to those events. For example your task can have terminating events.
Regards,
Karri

How Can I get multi column values from dynamic search help?

Hi Gurus;
I'm using dynamic search help in my program.
I want to get multi column values from search help. But I dont know solution for this issue.
I'm using F4IF_INT_TABLE_VALUE_REQUEST FM.
How Can I get multi column values from dynamic search help?
Thanks.

Believe it or not, the same FM worked for me in a dynpro. I will try to explain here how it works in custom screen and then you can do your work for other screens or program types. I am not going to write my actual work but will explain in general.
I have 4 fields (FLD1, FLD2, FLD3, FLD4) and i made the search based on FLD2 and when user click on a line (could be any field), then this would bring the line on to the screens.
There are like 3 steps.
You have your value_tab for my fields FLD1, FLD2, FLD3 and FLD4. This is just the data that we pass into the FM. (data: IT_VALTAB type table of ZVAL_TABLE)
Next map the screen fields into an internal table (data: It_dynpfld type table of dselc ). I also have other internal tables defined (just to keep it straight, i will be putting here) data: It_return type standard table of ddshretval.
Next step is to call the function module. Make sure you have values in IT_VALTAB.
call function 'F4IF_INT_TABLE_VALUE_REQUEST'
exporting
        retfield        = 'FLD2'
        value_org       = 'S'
      tables
        value_tab       = It_VALTAB
        return_tab      = It_return
        dynpfld_mapping = It_dynpfld
      exceptions
        parameter_error = 1
        no_values_found = 2
        others          = 3.
    if sy-subrc <> 0.
      message id sy-msgid type sy-msgty number sy-msgno
      with sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
    else.
      perform get_selected_fields tables It_return.
    endif.
The code within the perform GET_SELECTED_FIELDS - We need to map the result fields after user selects it. The code goes like this. This is step is to update the dynpro fields.
I need a internal table as well as a work area here. like,
data: lt_fields type table of dynpread,
        la_fields type dynpread.
field-symbols: <fs_return> type ddshretval.
so fill out LT_FIELDS from the IT_RETURN table
loop at lt_return assigning <fs_return>.
    la_fields-fieldname = <fs_return>-retfield.
    la_fields-fieldvalue = <fs_return>-fieldval.
    append la_fields to lt_fields.
    clear: la_fields.
endloop.
Call the FM to update the dynpro
call function 'DYNP_VALUES_UPDATE'
    exporting
      dyname               = sy-repid
      dynumb               = '1002' "This is my screen number. You could use 1000 for selection screen (hope so)
    tables
      dynpfields           = lt_fields
    exceptions
      invalid_abapworkarea = 1
      invalid_dynprofield = 2
      invalid_dynproname   = 3
      invalid_dynpronummer = 4
      invalid_request      = 5
      no_fielddescription = 6
      undefind_error       = 7
      others               = 8.
if sy-subrc <> 0.
    message id sy-msgid type sy-msgty number sy-msgno
            with sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
endif.
good luck

Recupérer les valeur d'un Control via un .obj appelé depuis une DLL- Getting a Control value from an .obj file called from a dll

Bonjour,
Suite au passage à la version CVI 2013, il faut passer par un fichier .obj au lieu du .c quand on veut utiiser la LoadExternalModule.
Le pb qui en résulte impossibilité de récupérer la valeur des control dans l'uir géré par le .obj qui est appelé par une dll.
Autrement, il m'est impossible de faire parvenir à la dll les valeur des control ( dll qui appelle le .obj).
Quelqu'un a eu le même soucis amigos?
Merci
Hi,
When using the LoadExternalModule function in CVI 2013, we can no longer use a .c file. Instead we have to use an .obj file.
My issue is that' impossible for me to get a control value from an .iur managed by the .obj witchi is called by a dll.
Otherwise it's impossible for me to get the control vale when calling the .obj from a dll.
Any suggestions Amigos
Thanks

For people who could be interested in, here the code I provided to the customer. This code demonstrates that calling a function defined in a .obj file from a DLL which is called itself by a program can be realized without throwing any error.
In order to use this example, you will have to :
1) Open "main.cws"
2) Define "Madll" as Active Project (right clic on the project and click on "Set Active Project")
3) Build the DLL (CTRL+M)
4) Define "Main" as Active Project
5) Click on "Debug Project" in order to build the executable and run it
This example has been built with CVI 2013.
Jérémy C.
National Instruments France
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Travaux Pratiques d'initiation à LabVIEW et à la mesure
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Getting 2nd Least Value from Different Column

Hi there All,
I have one odd requirement.
I hava table which has diffrent columns of numeric Datatype.
The task is to get the least values from the table.
I can take the least value by least(col1,col2,col3 ...) function.Until this stage it is fine.
But also I have take 2nd least value and 3rd least value, which I am quite unsure how to get it.
Looking forward for suggestions.
Thanks in Advance.
Regards,
Ajeet

The following is a generic solution that will allow you to select the nth least and allow you to pass as many column names as you like and will return null if the nth least requested exceeds the number of distinct values. The nleast function that I wrote uses the str2tbl function by Tom Kyte. I have included a demonstration of its usage below. The value returned for the 1st least is the same as that returned by the least function.
This should have been posted on the SQL and PL/SQL discussion group of these forums, rather than the general database. I also posted the same response in the SQL discussion group of the Orafaq forums.
scott@ORA92> -- test data:
scott@ORA92> SELECT * FROM your_table
2 /
      COL1       COL2       COL3
         1          2          3
         4          6          5
         8          7          9
        11         12         10
        15         13         14
        18         17         16
6 rows selected.
scott@ORA92> -- type and functions:
scott@ORA92> create or replace type myTableType as table of number;
2 /
Type created.
scott@ORA92> create or replace function str2tbl( p_str in varchar2 )
2 return myTableType
3 as
4       l_str      long default p_str || ',';
5       l_n         number;
6       l_data    myTableType := myTabletype();
7 begin
8       loop
9           l_n := instr( l_str, ',' );
10           exit when (nvl(l_n,0) = 0);
11           l_data.extend;
12           l_data( l_data.count ) := ltrim(rtrim(substr(l_str,1,l_n-1)));
13           l_str := substr( l_str, l_n+1 );
14       end loop;
15       return l_data;
16 end;
17 /
Function created.
scott@ORA92> CREATE OR REPLACE FUNCTION nleast
2    (p_n        IN NUMBER,
3      p_nums        IN VARCHAR2)
4    RETURN           NUMBER
5 AS
6    v_nleast      NUMBER;
7 BEGIN
8    SELECT DISTINCT column_value
9    INTO   v_nleast
10    FROM   (SELECT column_value,
11                 DENSE_RANK () OVER (ORDER BY column_value) AS num_rk
12             FROM   (select *
13                  from   table (CAST (str2tbl (p_nums) AS mytabletype)))
14            WHERE   column_value IS NOT NULL)
15    WHERE num_rk = p_n;
16    RETURN v_nleast;
17 EXCEPTION
18    WHEN OTHERS THEN RETURN NULL;
19 END nleast;
20 /
Function created.
scott@ORA92> SHOW ERRORS
No errors.
scott@ORA92> -- query:
scott@ORA92> SELECT col1, col2, col3,
2          LEAST (col1, col2, col3) AS the_least,
3          nleast (1, col1 || ',' || col2 || ',' || col3) AS first_least,
4          nleast (2, col1 || ',' || col2 || ',' || col3) AS second_least,
5          nleast (3, col1 || ',' || col2 || ',' || col3) AS third_least,
6          nleast (4, col1 || ',' || col2 || ',' || col3) AS fourth_least
7 FROM   your_table
8 /
      COL1       COL2       COL3 THE_LEAST FIRST_LEAST SECOND_LEAST THIRD_LEAST FOURTH_LEAST
         1          2          3          1           1            2           3
         4          6          5          4           4            5           6
         8          7          9          7           7            8           9
        11         12         10         10          10           11          12
        15         13         14         13          13           14          15
        18         17         16         16          16           17          18
6 rows selected.

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