sql.py 文件源码

def _oid_col(self):
        # OID remains a little hackish so far
        if not hasattr(self, '_oid_column'):
            if self.table.engine.oid_column_name() is not None:
                self._oid_column = schema.Column(self.table.engine.oid_column_name(), sqltypes.Integer, hidden=True)
                self._oid_column._set_parent(self.table)
            else:
                self._oid_column = None
        return self._oid_column