Mysql Condition /Handler(异常处理)
关于介绍,可参见:http://www.cnblogs.com/end/archive/2011/04/01/2001946.html。
http://blog.csdn.net/rdarda/article/details/7884044
14.6.7.2 DECLARE ... HANDLER Syntax
可参见:http://blog.csdn.net/yueliangdao0608/article/details/7817611