code: def setUpClass(cls):
      cls.db_dir = suffix_pytest_xdist_worker_id_to_dir(
          EvaDB_DATABASE_DIR
      )
      cls.conn = connect(cls.db_dir)
      cls.evadb = cls.conn._evadb
  
imports: import unittest
  from test.markers import qdrant_skip_marker
  from test.util import DummyObjectDetector, create_sample_video, load_functions_for_testing, shutdown_ray, suffix_pytest_xdist_worker_id_to_dir
  import numpy
  import pandas
  from pandas.testing import assert_frame_equal
  from evadb.binder.binder_utils import BinderError
  from evadb.configuration.constants import DEFAULT_DOCUMENT_CHUNK_OVERLAP, DEFAULT_DOCUMENT_CHUNK_SIZE, EvaDB_DATABASE_DIR, EvaDB_ROOT_DIR
  from evadb.executor.executor_utils import ExecutorError
  from evadb.interfaces.relational.db import connect
  from evadb.models.storage.batch import Batch
  from evadb.server.command_handler import execute_query_fetch_all
label_desc: Use image node_id 2 for calling the RelationalAPI obj's underlying member method code with example usage: obj.setUpClass(cls) without return types