code: def execute(self, operation, parameters=None, configuration=None):
          
          # PEP 249
          self.execute_async(operation, parameters=parameters,
                             configuration=configuration)
          log.debug('Waiting for query to finish')
          self._wait_to_finish()  # make execute synchronous
          log.debug('Query finished')
docs: Synchronously execute a SQL query.
  
          Blocks until results are available.
  
          Parameters
          ----------
          operation : str
              The SQL query to execute.
          parameters : str, optional
              Parameters to be bound to variables in the SQL query, if any.
              Impyla supports all DB API `paramstyle`s, including `qmark`,
              `numeric`, `named`, `format`, `pyformat`.
          configuration : dict of str keys and values, optional
              Configuration overlay for this query.
  
          Returns
          -------
          NoneType
              Results are available through a call to `fetch*`.