When attempting to fetch a data row , if the protocol handler cannot connect to sql server within the specified time , it reports a time - out error for that row 尝试提取数据行时,如果协议处理程序无法在指定时间内连接到sql server ,它将为该行报告超时错误。
In addition , some programming techniques , such as recursion , are impossible to use - - for example , this rules out protocol handlers being recursive - descent parsers 此外,象递归之类的一些编程的技术不可能使用例如,递归消解了协议处理程序成为循环下降的语法分析程序的可能。