Help with :new and :old keywords

Question

I am trying to write a trigger that calls a cursor with info from the user_tab_columns. Then I use the cursor in a For-loop for accessing a specific column for each row. Ineed the :new value of the specific column to pass it as an argument to a procedure. Here is my code:
For each_r in MyPackage.PrimKey_Cursor (TABLENAME)
Loop
New_val := (:new.| |each_r.Column_Name);
MyPackage.LogIns ('TABLENAME', each_r.Column_Name, New_val);
End loop;
My problem is the New_val variable pass only the string :New.COLUMNNAME instead of the new value of the COLUMNNAME.
How can I do this passing of :new, :old values to a procedure when the column name is variable?
YOur help is greatly appreciated.
Thaks,
Cip

Answer 1

IMPLEMENTS
By using the implement keyword I am 'agreeing' to use
(implement) the methods of that interface. I am still
required to import the correct package for the
compiler to see the interface I have implemented. If
I attempt to use the
actionPerformed() method without implementing the
actionListener interface it will not be recognized
and therefor will result in a compile-time error.You can write an "actionPerformed" method without saying that you are implementing ActionListener. But, even if you have an actionPerformed method with the correct signature (name and parameter types), you won't be able to add your class as an ActionListener to a JButton. The compiler expects an ActionListener for "addActionListener". If you didn't tell the compiler that your class is an ActionListener by writing "implements ActionListener", it would give you an error on the "addActionListener(this)" line.
IMPORT
Allows me to access with out full classpath the
methods and objects of any packages that I have
impoted. The reason I do not have to do this with
System.out.println() is because that is in a package
that the compiler has default access to.
If I were to attemp to use JTextArea without first
importing Javax.swing.*;
I would get a class not found error....You never actually have to explicitly import anything. You could instead write all of the classnames out in full as:
public class KeyEventDemo extends javax.swing.JPanel
             implements java.awt.event.KeyListener, java.awt.event.ActionListener
    javax.swing.JTextArea displayArea;
    javax.swing.JTextField typingArea;
    static final java.lang.String newline = "\n";
}Using import statements makes your code a little easier to write, because the names are shorter.
Actually, your main method has an example of using a class without explicitly importing it:
javax.swing.SwingUtilities.invokeLater(...);
so, am I right or at least near right?Yes. Some right, some near right. :)