@Test
public void test_DescribeTable() throws ROdpsException, OdpsException {

  List<DataFrameItem> ret = rodps.describeTable(null, table, null);
  for (DataFrameItem d : ret) {
    List res = d.getData();
    System.out.println(d.getName());
    System.out.println(res);
  }
  assertNotNull(ret);
}