PreparedBulkUpdateMessageProcessor queryMessageProcessor = (PreparedBulkUpdateMessageProcessor) messageProcessors.get(0);
Result<MetaData> outputMetaData = queryMessageProcessor.getOutputMetaData(null);
DefaultListMetaDataModel listMetaDataModel = (DefaultListMetaDataModel) outputMetaData.get().getPayload();
assertThat(listMetaDataModel.isArray(), equalTo(true));
SimpleMetaDataModel elementModel = (SimpleMetaDataModel) listMetaDataModel.getElementModel();
assertThat(elementModel.getDataType(), equalTo(DataType.DOUBLE));
}