postgres.py 文件源码

def get_column_default(self, column):
        if column.primary_key and isinstance(column.type, types.Integer) and (column.default is None or (isinstance(column.default, schema.Sequence) and column.default.optional)):
            c = self.proxy("select nextval('%s_%s_seq')" % (column.table.name, column.name))
            return c.fetchone()[0]
        else:
            return ansisql.ANSIDefaultRunner.get_column_default(self, column)