@Override
  public byte[] getBytes(int columnIndex) throws SQLException {
    RequestDelegate<byte[]> delegate = createLocalRequestDelegate();
    for (ResultSet rs : resultSets) {
      delegate.addRequest(() -> rs.getBytes(columnIndex));
    }
    return delegate.requestAllAndCompare();
  }
The implementation of {@link ClusterTestResultSet} in cluster test.
integration-test/src/main/java/org/apache/iotdb/itbase/runtime/ClusterTestResultSet.java