code: def select_db(self, db):
          '''Set current db'''
          yield self._execute_command(COMMAND.COM_INIT_DB, db)
          yield self._read_ok_packet(f select_db(self, db):
          '''Set current db'''
          yield self._execute_command(COMMAND.COM_INIT_DB, db)
          yield self._read_ok_packet()
docs: Set current db