ResultSetId rssId = (ResultSetId) rsds.getId();
IResultSerializerFactoryProvider resultSerializerFactoryProvider = ResultSerializerFactoryProvider.INSTANCE;
IAWriterFactory writerFactory = PrinterBasedWriterFactory.INSTANCE;
ResultWriterOperatorDescriptor resultWriter = null;
try {
IResultSerializerFactory resultSerializedAppenderFactory = resultSerializerFactoryProvider
.getAqlResultSerializerFactoryProvider(printColumns, printerFactories, writerFactory);
resultWriter = new ResultWriterOperatorDescriptor(spec, rssId, ordered, false,
resultSerializedAppenderFactory);
} catch (IOException e) {
throw new AlgebricksException(e);
}