Passing an array to a sub-vi

I see there are some questions posted on this already, but I don't quite get the answers I want.
My problem is that I have a top-vi with a package of data for each machine we're operating.
These data are organized into a cluster (for each machine) which is then put into a one dimensional array.
The code for manipulating this is quite complex, and I'd like to put it into a sub-vi. The data have a front panel object
My first approach would be to just pass this array over, modify it and return it. However, I'd also sometimes like to grey out some data that are not relevant.
Next approach would be to pass a reference to the array, and then use this reference to both modify the data and grey out some of the data. However, I don't manage to do this - can anyone give me a receipe for this?
Another approach that could have been useful - especially when I have situations where I call the same sub-vi many places - would be for the sub-vi to have its own front panel that is displayed when you add the vi to the block diagram (basically same functionality as lv built in objects. Is this possible to create?
Thx

Rodnebb wrote:
My problem is that I have a top-vi with a package of data for each machine we're operating.
These data are organized into a cluster (for each machine) which is then put into a one dimensional array.
My first approach would be to just pass this array over, modify it and return it. However, I'd also sometimes like to grey out some data that are not relevant.
You cannot set the properties for individua array elements like greying out a particular element of an array.
But, you can do so for the individual elements of a cluster by making use of its Controls[] property.
- Partha
LabVIEW - Wires that catch bugs!

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The query looks like that:
ExpressionBuilder seq = new ExpressionBuilder();
Expression exp = seq.get("id").in(keys);
ReadAllQuery query = new ReadAllQuery();
query.setReferenceClass(RegistrationNumberSequencer.class);
query.addArgument("keys");
query.setSelectionCriteria(exp);
And the "keys" would be:
Object[] keys = new Object[2];
keys[0]= new BigDecimal(1);
keys[1]= new BigDecimal(2);
I have got a conversion exception(Could not convert to BigDecimal class) when executing the query.
Can I pass this array as a parameter somehow ?
Thanks a lot
Ovidiu

Hi Ovidiu,
My apologies for the missed code. You need to pass the vector of elements into another vector, so TopLink will interpret the single element of the second vector as the correct query argument, and expend the elements in the first vector into the IN clause.
The named query defined I sent in previous mail is still correct, but you need to pass in the argument like:
Vector keys = new Vector();
keys.addElement(new BigDecimal(1));
keys.addElement(new BigDecimal(2));
Vector arg = new Vector(1);
arg.addElement(keys);
Now you can pass the arg in when executing the query, and should get the correct result.
To stand my claim, I did a mini test using our TopLink Employee demo and here is the generated SQL:
Call:SELECT t0.VERSION, t1.EMP_ID, t0.L_NAME, t0.F_NAME, t1.SALARY, t0.EMP_ID, t0.GENDER, t0.END_DATE, t0.START_DATE, t0.MANAGER_ID, t0.START_TIME, t0.END_TIME, t0.ADDR_ID FROM EMPLOYEE t0, SALARY t1 WHERE ((t0.EMP_ID IN (1, 2)) AND (t1.EMP_ID = t0.EMP_ID))
You can see the IN clause in generated as expected!
As Doug said, we do not officially support array as query argument yet. I would use the proper way to build the query.
King

Passing an array of objects to a method.

Hi I'm building a program to act as a CD Collection Database. An array of objects represents the entries: Artist, Album and NUmber of Tracks. What I want to do is in the Menu, user to choose wether he or she wants to Add new CD to collection, print or quit, if he/she does then I call a method addNewEntry, to which i pass the array of objects called array, and I want the user to enter the entries each in turn, after that i want the program to return to the method Menu and ask if he or she wants to quit, print or add new cd. The idea is that the details entered already would be contained in the array of objects [0], so the next set of details go to [1] and then to [2] and so on. I have build up the code at this stage but i get an error while copmiling and im totally stuck. Im a beginner in Java.
Here is the code:
//by Andrei Souchinski
//Mini Project: CD Collection Database
//Designed for a grade F
//Defining new class of objects to represent CD database entries.
//A database entry consists of the artist name, the album name and number of tracks.
//A single entry can be entered by the user typing the details in and the entry can be printed out.
import javax.swing.*;
import java.util.*;
public class MiniProject
     public static void main (String[] args)
          System.out.println("\tCD Collection Database\n");
          System.out.println("1. Add new Compact Disk to the Database");
          System.out.println("2. Print out current database entries");
          System.out.println("3. Quit\n");
          theMenu();
     public static void theMenu()
          CompactDisk [] array = new CompactDisk[20];
          String menu;
          menu = JOptionPane.showInputDialog("What would you like to do?");
          if (menu.equals ("3"))
               JOptionPane.showMessageDialog(null, "Thank You For Using our Service! \nGoodbye!");
               System.exit(0);
          if (menu.equals ("2"))
          if (menu.equals ("1"))
          addNewEntry(array);
          else
               JOptionPane.showMessageDialog(null, "Please select your choice form the menu");
               theMenu();
     public int addNewEntry(int newcd[])
               int i;
               newcd[i] = (JOptionPane.showInputDialog("Please enter the name of the Artist"));
               newcd[i] = (JOptionPane.showInputDialog("Please enter the name of the Album"));
               newcd[i] = (Integer.parseInt (JOptionPane.showInputDialog("Please enter the number of tracks on this album")));
//A Compact Disk entry consists of three attributes: artist name, album and number of tracks
class CompactDisk
     public String artistname; //Instance variables for artistname, albumname and numberoftracks.
     public String albumname;
     public int numberoftracks;
     public CompactDisk(String n, String a, int t)
     artistname = n; //Stores the 1st argument passed after "new Dates" into day
     albumname = a; //Stores the 2nd argument passed after "new Dates" into month
     numberoftracks = t; //Stores the 3rd argument passed after "new Dates" into year
     //When called from the main method, prints the contents of
     //artistname, albumname and numberoftracks on to the screen.
     public void printCompactDisk ()
               String output = "\n " + artistname + "\n " + albumname + "\n " + numberoftracks;
               System.out.println(output);
}

//by Andrei Souchinski
//Mini Project: CD Collection Database
//Designed for a grade F
//Defining new class of objects to represent CD database entries.
//A database entry consists of the artist name, the album name and number of tracks.
//A single entry can be entered by the user typing the details in and the entry can be printed out.
import javax.swing.*;
import java.util.*;
public class MiniProject
     public static void main (String[] args)
          System.out.println("\tCD Collection Database\n");
          System.out.println("1. Add new Compact Disk to the Database");
          System.out.println("2. Print out current database entries");
          System.out.println("3. Quit\n");
          theMenu();
     public static void theMenu()
          String menu;
          menu = JOptionPane.showInputDialog("What would you like to do?");
          if (menu.equals ("3"))
               JOptionPane.showMessageDialog(null, "Thank You For Using our Service! \nGoodbye!");
               System.exit(0);
          if (menu.equals ("2"))
          if (menu.equals ("1"))
          addNewEntry();
          else
               JOptionPane.showMessageDialog(null, "Please select your choice form the menu");
               theMenu();
     public static void addNewEntry()
               CompactDisk [] array = new CompactDisk[20];
               int i = 0;
               array.artistname = (JOptionPane.showInputDialog("Please enter the name of the Artist"));
               array[i].albumname = (JOptionPane.showInputDialog("Please enter the name of the Album"));
               array[i].numberoftracks = (Integer.parseInt (JOptionPane.showInputDialog("Please enter the number of tracks on this album")));
//A Compact Disk entry consists of three attributes: artist name, album and number of tracks
class CompactDisk
     public String artistname; //Instance variables for artistname, albumname and numberoftracks.
     public String albumname;
     public int numberoftracks;
     public CompactDisk(String n, String a, int t)
     artistname = n; //Stores the 1st argument passed after "new Dates" into day
     albumname = a; //Stores the 2nd argument passed after "new Dates" into month
     numberoftracks = t; //Stores the 3rd argument passed after "new Dates" into year
     //When called from the main method, prints the contents of
     //artistname, albumname and numberoftracks on to the screen.
     public void printCompactDisk ()
               String output = "\n " + artistname + "\n " + albumname + "\n " + numberoftracks;
               System.out.println(output);
I've edited the code, itcompiles, but gives an error when i ran it..:(

How to pass an array to a subroutine in FXscript?

Hi,
I am having problems trying to pass an array to a subroutine in FXscript. Code segment:
on TestSub(value x)
// do stuff
end
float i, testarray[256];
for i = 0 to 255
testarray[i] = i;
next
TestSub(testarray);
FXscript returns the error "missing close parenthesis". If TestSub(testarray) is replaced with TestSub(testarray[0]) no error, i.e. if a single value is passed.
Trying to define the subroutine differently doesn't help, e.g. "on TestSub(value x[255])" or "on TestSub(float x[255])" yields the same error.
How do you pass an array to an FXscript subroutine? Or is it not possible?
Thanks for any clues...

You are not being quite clear. If the next frame expects a pointer to a buffer, it cannot be a vi. Labview has no pointer types. You must be referring to a Call Library Node which is set up to call a DLL function. If this is the case, you need to configure the Call Library Node to accept an array of the data type. Then you can wire the array into the call library node.
Is this the case, Call Library Node?
- tbob
Inventor of the WORM Global

Pass an array of a user defined class to a stored procedure in java

Hi All,
I am trying to pass an array of a user defined class as an input parameter to a stored procedure. So far i have done the following:
Step 1: created an object type.
CREATE TYPE department_type AS OBJECT (
DNO NUMBER (10),
NAME VARCHAR2 (50),
LOCATION VARCHAR2 (50)
Step 2: created a varray of the above type.
CREATE TYPE dept_array1 AS TABLE OF department_type;
Step 3:Created a package to insert the records.
CREATE OR REPLACE PACKAGE objecttype
AS
PROCEDURE insert_object (d dept_array);
END objecttype;
CREATE OR REPLACE PACKAGE BODY objecttype
AS
PROCEDURE insert_object (d dept_array)
AS
BEGIN
FOR i IN d.FIRST .. d.LAST
LOOP
INSERT INTO department
VALUES (d (i).dno,d (i).name,d (i).location);
END LOOP;
END insert_object;
END objecttype;
Step 4:Created a java class to map the columns of the object type.
public class Department
private double DNO;
private String Name;
private String Loation;
public void setDNO(double DNO)
this.DNO = DNO;
public double getDNO()
return DNO;
public void setName(String Name)
this.Name = Name;
public String getName()
return Name;
public void setLoation(String Loation)
this.Loation = Loation;
public String getLoation()
return Loation;
Step 5: created a method to call the stored procedure.
public static void main(String arg[]){
try{
Department d1 = new Department();
d1.setDNO(1); d1.setName("Accounts"); d1.setLoation("LHR");
Department d2 = new Department();
d2.setDNO(2); d2.setName("HR"); d2.setLoation("ISB");
Department[] deptArray = {d1,d2};
OracleCallableStatement callStatement = null;
DBConnection dbConnection= DBConnection.getInstance();
Connection cn = dbConnection.getDBConnection(false); //using a framework to get connections
ArrayDescriptor arrayDept = ArrayDescriptor.createDescriptor("DEPT_ARRAY", cn);
ARRAY deptArrayObject = new ARRAY(arrayDept, cn, deptArray); //I get an SQLException here
callStatement = (OracleCallableStatement)cn.prepareCall("{call objecttype.insert_object(?)}");
((OracleCallableStatement)callStatement).setArray(1, deptArrayObject);
callStatement.executeUpdate();
cn.commit();
catch(Exception e){
System.out.println(e.toString());
I get the following exception:
java.sql.SQLException: Fail to convert to internal representation
My question is can I pass an array to a stored procedure like this and if so please help me reslove the exception.
Thank you in advance.

OK I am back again and seems like talking to myself. Anyways i had a talk with one of the java developers in my team and he said that making an array of structs is not much use to them as they already have a java bean/VO class defined and they want to send an array of its objects to the database not structs so I made the following changes to their java class. (Again hoping some one will find this useful).
Setp1: I implemented the SQLData interface on the department VO class.
import java.sql.SQLData;
import java.sql.SQLOutput;
import java.sql.SQLInput;
import java.sql.SQLException;
public class Department implements SQLData
private double DNO;
private String Name;
private String Location;
public void setDNO(double DNO)
this.DNO = DNO;
public double getDNO()
return DNO;
public void setName(String Name)
this.Name = Name;
public String getName()
return Name;
public void setLocation(String Location)
this.Location = Location;
public String getLoation()
return Location;
public void readSQL(SQLInput stream, String typeName)throws SQLException
public void writeSQL(SQLOutput stream)throws SQLException
stream.writeDouble(this.DNO);
stream.writeString(this.Name);
stream.writeString(this.Location);
public String getSQLTypeName() throws SQLException
return "DOCCOMPLY.DEPARTMENT_TYPE";
Step 2: I made the following changes to the main method.
public static void main(String arg[]){
try{
Department d1 = new Department();
d1.setDNO(1);
d1.setName("CPM");
d1.setLocation("LHR");
Department d2 = new Department();
d2.setDNO(2);
d2.setName("Admin");
d2.setLocation("ISB");
Department[] deptArray = {d1,d2};
OracleCallableStatement callStatement = null;
DBConnection dbConnection= DBConnection.getInstance();
Connection cn = dbConnection.getDBConnection(false);
ArrayDescriptor arrayDept = ArrayDescriptor.createDescriptor("DEPT_ARRAY", cn);
ARRAY deptArrayObject = new ARRAY(arrayDept, cn, deptArray);
callStatement = (OracleCallableStatement)cn.prepareCall("{call objecttype.insert_array_object(?)}");
((OracleCallableStatement)callStatement).setArray(1, deptArrayObject);
callStatement.executeUpdate();
cn.commit();
catch(Exception e){
System.out.println(e.toString());
and it started working no more SQLException. (The changes to the department class were done manfully but they tell me JPublisher would have been better).
Regards,
Shiraz

How to pass an array to a function from a SELECT statement

Hi all. I have a problem with passing an array to a function directly from a SELECT statement.
Here is what I want. If I have a function
function AAA(arrayVar <ArrayType>) return number;
I want to be able to call this function this way
select AAA((2,3,4))
from dual
or this way
select AAA((10,12))
from dual
In other words I want to be able to pass an arbitrary number of numbers to the function. And I want this to work in a SELECT statement.
Does anyone have any ideas how to implement this? What <ArrayType> should I use?(I've read about VARRAY, nested tables in the Oracle documentation but as far as I've understood these array types are meant to be used within PL/SQL blocks).
I found only this http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:208012348074 through Google but it didn't help me.
Thank you in advance.

> What <ArrayType> should I use?
SQL data types - as 3360 showed above. You cannot use PL/SQL structures and user types in the SQL Engine.
You can however use all SQL structures and types in PL/SQL.
Arrays in SQL is created as collection type - basic o-o. The collection type (or class) serve as a container for instantiated objects or scalar type.
This is covered in detail in [url http://download-uk.oracle.com/docs/cd/B19306_01/appdev.102/b14260/toc.htm]
Oracle® Database Application Developer's Guide - Object-Relational Features

Passing an array to a sub-vi

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