String newColumnName = request.getParameter("newColumnName");
int columnInsertIndex = Integer.parseInt(request.getParameter("columnInsertIndex"));
int delay = Integer.parseInt(request.getParameter("delay"));
String onError = request.getParameter("onError");
return new ColumnAdditionByFetchingURLsOperation(
engineConfig,
baseColumnName,
urlExpression,
TextTransformOperation.stringToOnError(onError),
newColumnName,