db.py 文件源码

def truncate(self):
        """Clean the database of any state Ravel components, except for 
           topology tables.  This rolls back the database to the state after
           the topology is first loaded"""
        try:
            tables = ["cf", "clock", "p_spv", "spatial_ref_sys", "spv_tb_del",
                      "spv_tb_ins", "rm", "rm_delta", "urm"]

            self.cursor.execute("truncate %s;" % ", ".join(tables))
            logger.debug("truncated tables")
            self.cursor.execute("INSERT INTO clock values (0);")
        except psycopg2.DatabaseError, e:
            logger.warning("error truncating databases: %s", self.fmt_errmsg(e))