code: def test_delete_in_integration(self, mock_handler):
      self.set_handler(mock_handler, name="pg", tables={})
  
      sql = """
               delete from
                   pg.table2
               where
                   b1 = 'b'
           """
  
      self.execute(sql)
  
      # 1 select and 2 updates
      assert mock_handler().query.call_count == 1
  
      # second is update
      assert (
          mock_handler().query.call_args_list[0][0][0].to_string()
          == "DELETE FROM table2 WHERE b1 = 'b'"
      )
  
imports: from unittest.mock import patch
  import datetime
  import tempfile
  import pytest
  import pandas
  import numpy
  from mindsdb_sql.render.sqlalchemy_render import SqlalchemyRender
  from mindsdb.api.executor.utilities.sql import query_df
  from mindsdb.api.mysql.mysql_proxy.utilities.lightwood_dtype import dtype
  from .executor_test_base import BaseExecutorMockPredictor
label_desc: Use image node_id 4 for calling the TestComplexQueries obj's underlying member method code with example usage: obj.test_delete_in_integration(mock_handler) without return types