Bug 142462 Cannot create bindings for data set output parameters
Define a JDBC Stored Procedure data set with at least one data set output parameter. Bind this data set to a table. Edit data binding for the table and add a new binding. In the expression builder, under "Available Data Sets", only the columns for the data set are shown as available. The output parameters are not shown. This is a regression against 2.0. This bug makes data set parameters unusable.
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DEUtil.java
return exp;
	}
	/**
	 * Returns the level between the holder and the given handle
	 * 
	 * @param holder
	 *            the handle of the holder
	 * @param baseElement
	 *            the handle of the base element
	 * 
	 * @return the level between the holder and the base element, or -1 if the
	 *         element is not a children of the holder
	 */
	public static int getBindingLevel( DesignElementHandle holder,
			DesignElementHandle baseElement )
	{
		int level = 0;
		for ( DesignElementHandle elementHandle = baseElement; elementHandle.getContainer( ) != null; elementHandle = getBindingHolder( elementHandle ).getContainer( ), level++ )
		{
			DesignElementHandle bindingHolder = getBindingHolder( elementHandle );
			if ( bindingHolder == holder )
			{
				return level;
			}
			if ( holder instanceof GroupHandle
					&& bindingHolder == holder.getContainer( ) )
			{
				return level;
			}
		}