base.py 文件源码

def __init__(self, timezone=False, fsp=None):
        """Construct a MySQL TIMESTAMP type.

        :param timezone: not used by the MySQL dialect.
        :param fsp: fractional seconds precision value.
         MySQL 5.6.4 supports storage of fractional seconds;
         this parameter will be used when emitting DDL
         for the TIMESTAMP type.

         .. note::

            DBAPI driver support for fractional seconds may
            be limited; current support includes
            MySQL Connector/Python.

        .. versionadded:: 0.8.5 Added MySQL-specific :class:`.mysql.TIMESTAMP`
           with fractional seconds support.

        """
        super(TIMESTAMP, self).__init__(timezone=timezone)
        self.fsp = fsp