Bug 136074 Filter editor needs to support column binding
In the Fitler tab of property editor for table/chart, Expression only shows dataset column, rather than column binding. Since column binding is supported for filter of table/chart, this is supposed to show the column binding.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/views/attributes/providers/SortingModelProvider.java
}
		else
			return value;
		return "";
	}
	/**
	 * Saves new property value to sort
	 * 
	 * @param element
	 *            DesignElementHandle object.
	 * @param element
	 *            Sort object
	 * @param key
	 *            Property key
	 * @param newValue
	 *            new value
	 * @return
	 * @throws SemanticException
	 * @throws NameException
	 */
	public boolean setStringValue( Object item, Object element, String key,
			String newValue ) throws SemanticException
	{
		if ( key.equals( SortKey.KEY_MEMBER ) )
		{
			String value = DEUtil.getExpression( getResultSetColumn( newValue ) );
			if ( value != null )
				newValue = value;
		}