code: private void applyRelativePath(RelationQueryNode node) {
         if (tmpRelPath != null)
         {
            // try {
            QPath relPath = tmpRelPath;
            for (int i = 0; i < relPath.getEntries().length; i++)
            {
               node.addPathElement(relPath.getEntries()[i]);
            }
            tmpRelPath = null;
         }
      }
docs: Applies {@link #tmpRelPath} to <code>node</code> and reset the path to
  <code>null</code>.
  
  @param node a relation query node.