Bug 201673 Data Set Editor should not generate Parameter Position for an Named ODA Parameter
It is valid for an ODA data set parameter definition to have a driver-defined (native) name and no position (value = 0). The Data Set Editor currently assumes that this is not valid. It should *not* have automatically assign a derived position ( >0 value) to the data set parameter and issue a user warning message. The warning message in this case is inaccurate. And by assigning a bogus parameter position, it may disable the ability for the Data Engine to use the parameter's native name when interacting with the ODA runtime driver.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/data/ui/property/AbstractPropertyDialog.java
* this method returns true.
	 * 
	 * @return boolean indicating whether the method was successful or not.
	 */
	public abstract boolean performOk( );
	/**
	 * Called when the user presses the Cancel button. It is called only if all
	 * the pages return true for their individual
	 * {@link org.eclipse.birt.report.designer.data.ui.property.IPropertyPage#performCancel() performCancel()}
	 * methods. <br/>The dialog is closed if this method returns true.
	 * 
	 * @return boolean indicating whether the method was successful or not.
	 */
	public abstract boolean performCancel( );
	private final void performHelp( )
	{
		
		if ( currentNode != null )
		{
			currentNode.getPage( ).performHelp( );
		}
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.dialogs.Dialog#cancelPressed()
	 */
	protected final void cancelPressed( )
	{