<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def execute_async(self, operation, parameters=None, configuration=None):
 """Asynchronously execute a SQL query. Immediately returns after query is sent to the HS2 server. Poll with `is_executing`. A call to `fetch*` will block. 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*`. """

        log.debug('Executing query %s', operation)

        def op():
            if parameters:
                self._last_operation_string = _bind_parameters(operation,
                                                               parameters)
            else:
                self._last_operation_string = operation

            op = self.session.execute(self._last_operation_string,
                                      configuration,
                                      run_async=True)
            self._last_operation = op

        self._execute_async(op)