首页 / MYSQL / MySQL 错误处理例子[译]
MySQL 错误处理例子[译]
内容导读
互联网集市收集整理的这篇技术教程文章主要介绍了MySQL 错误处理例子[译]，小编现在分享给大家，供广大互联网技能从业者学习和参考。文章包含2421字，纯文字阅读大概需要4分钟。
内容图文
from http://www.devshed.com/c/a/MySQL/Error-Handling-Examples/ Error Handler Examples
Here are some examples of handler declarations:
If any error condition arises (other than a NOT FOUND ), continue execution after setting l_error=1 :
DECLARE CONTINUE HANDLER FOR SQLEXCEPTION
SET l_error=1;
If any error condition arises (other than a NOT FOUND ), exit the current block or stored program after issuing a ROLLBACK statement and issuing an error message:
DECLARE EXIT HANDLER FOR SQLEXCEPTION
BEGIN
ROLLBACK;
SELECT ‘Error occurred – terminating‘;
END;
If MySQL error 1062 (duplicate key value) is encountered, continue execution after executing the SELECT statement (which generates a message for the calling program):
DECLARE CONTINUE HANDER FOR 106 2
SELECT ‘Duplicate key in index‘;
If SQLSTATE 23000 (duplicate key value) is encountered, continue execution after executing the SELECT statement (which generates a message for the calling program):
DECLARE CONTINUE HANDER FOR SQLSTATE ‘23000‘
SELECT ‘Duplicate key in index‘;
When a cursor fetch or SQL retrieves no values, continue execution after setting l_done=1 :
DECLARE CONTINUE HANDLER FOR NOT
FOUND
SET l_done=1;
Same as the previous example, except specified using a SQLSTATE variable rather than a named condition:
DECLARE CONTINUE HANDLER FOR SQLSTATE ‘02000 ‘
SET l_done=1;
Same as the previous two examples, except specified using a MySQL error code variable rather than a named condition or SQLSTATE variable:
DECLARE CONTINUE HANDLER FOR 1329
SET l_done=1;
错误处理例子
有几种错误处理的声明形式：
§ 如果任何错误（不是 NOT FOUND ） , 设置 l_error 为 1 后继续执行：
DECLARE CONTINUE HANDLER FOR SQLEXCEPTION
SET l_error=1;
§ 如果发生任何错误（不是 NOT FOUND）， 执行 ROLLBACK和产生一条错误消息后退出当前块或存储过程。
DECLARE EXIT HANDLER FOR SQLEXCEPTION
BEGIN
ROLLBACK;
SELECT ‘Error occurred – terminating‘;
END;
§ 如果 MySQL 1062错误 (重复的健值 )发生，执行 SELECT语句（向调用程序发一条消息）后继续执行
DECLARE CONTINUE HANDER FOR 106 2
SELECT ‘Duplicate key in index‘;
§ 如果 SQLSTATE 2300错误 (重复的健值 )发生，执行 SELECT语句（向调用程序发一条消息）后继续执行
DECLARE CONTINUE HANDER FOR SQLSTATE ‘23000‘
SELECT ‘Duplicate key in index‘;
§ 当游标或者 SQL 选择语句没有返回值时，设置 l_done=1 后继续执行
DECLARE CONTINUE HANDLER FOR NOT
FOUND
SET l_done=1;
§ 此例除了用 SQLSTATE 变量而不是命名条件以外，跟前一个例子一样
DECLARE CONTINUE HANDLER FOR SQLSTATE ‘02000 ‘
SET l_done=1;
§ 此例除了用 MySQL 的错误码变量而不是命名条件或者 SQLSTATE 变量以外，跟前两个例子一样
DECLARE CONTINUE HANDLER FOR 1329
SET l_done=1;
原文：http://www.jb51.net/article/20513.htm
内容总结
以上是互联网集市为您收集整理的MySQL 错误处理例子[译]全部内容，希望文章能够帮你解决MySQL 错误处理例子[译]所遇到的程序开发问题。 如果觉得互联网集市技术教程内容还不错，欢迎将互联网集市网站推荐给程序员好友。
内容备注
版权声明：本文内容由互联网用户自发贡献，该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容， 请发送邮件至 gblab@vip.qq.com 举报，一经查实，本站将立刻删除。
内容手机端
扫描二维码推送至手机访问。
来源：【匿名】