@Override
  protected List<Object> getTableRelRecordFieldValues(KV record) {
    // Using the message rel converter, convert message to sql rel message and add to output values.
    SamzaSqlRelMessage relMessage = msgConverter.convertToRelMessage(record);
    return relMessage.getSamzaSqlRelRecord().getFieldValues();
  }
This class joins incoming {@link SamzaSqlRelMessage} with records {@link KV} from a remote table with the join key
defined by the format of the table key.
samza-sql/src/main/java/org/apache/samza/sql/translator/SamzaSqlRemoteTableJoinFunction.java