Bug 122869 Drag a parameter from data explorer view into a table in library, a new parameter is created automatically.
Description:Drag a parameter from data explorer view into a table in library, a new parameter is created automatically. Steps to reproduce: 1. Add a cascading parameter and a table in a library file. 2. Drag a parameter from data explorer view into a table cell in layout editor. 3. Find that a new parameter was added in data explorer view automatically.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/ExpressionBuilder.java
{
				target = functionTable;
			}
			if ( target != null )
			{
				target.setInput( selection.getFirstElement( ) );
			}
		}
	};
	private ITableLabelProvider tableLabelProvider = new ITableLabelProvider( ) {
		public Image getColumnImage( Object element, int columnIndex )
		{
			return provider.getImage( element );
		}
		public String getColumnText( Object element, int columnIndex )
		{
			return provider.getDisplayText( element );
		}
		public void addListener( ILabelProviderListener listener )
		{
		}
		public void dispose( )
		{
		}
		public boolean isLabelProperty( Object element, String property )
		{
			return true;
		}
		public void removeListener( ILabelProviderListener listener )
		{