mysql 存储过程异常处理

今天同事跟我说， mysql存储过程中发生异常了，怎么把异常的相关信息记录到另外一张表中，

他说网上找了，基本上没找到相关资料

通过看官方文档发现，其实还是能够处理的，我们可以分别定义异常然后在做相应的处理

1、首先看官方文档上的说明

mysql> help declare handler
Name: 'DECLARE HANDLER'
Description:
Syntax:
DECLARE handler_action HANDLER
FOR condition_value [, condition_value] ...
statement

handler_action:
CONTINUE --表示出现异常继续执行
| EXIT -- 表示出现异常退出执行
| UNDO -- 不支持

condition_value:
mysql_error_code
| SQLSTATE [VALUE] sqlstate_value
| condition_name
| SQLWARNING
| NOT FOUND
| SQLEXCEPTION

The DECLARE ... HANDLER statement specifies a handler that deals with
one or more conditions. If one of these conditions occurs, the
specified statement executes. statement can be a simple statement such
as SET var_name = value, or a compound statement written using BEGIN
and END (see [HELP BEGIN END]).

下面是举例主键冲突的例子，如果这个主键冲突那么就把冲突的主键给记录下来

create table test_table(
			id int primary key, 
			name varchar(30), 
			password varchar(30)
			); 
	create table record_repeat(
			id int, 
			occ_time datetime default now()
			);

delimiter //
 create  procedure test_conflict_data(inid int)
  begin
	declare t_id int;
	declare continue handler for SQLEXCEPTION 
	 begin 
	 insert into record_repeat(id) values(t_id); 
	 end;
   	set t_id=inid;
    insert into test_table(id) values(inid);
 end;
 //
delimiter ;

下面测试数据

mysql> call test_conflict_data(234234);
Query OK, 1 row affected (0.05 sec)

mysql> call test_conflict_data(234234);
Query OK, 1 row affected (0.05 sec)

mysql> call test_conflict_data(234236);
Query OK, 1 row affected (0.05 sec)

mysql> call test_conflict_data(234237);
Query OK, 1 row affected (0.03 sec)

mysql> call test_conflict_data(234237);
Query OK, 1 row affected (0.05 sec)

mysql> select * from  test_table;
+--------+------+----------+
| id     | name | password |
+--------+------+----------+
| 234234 | NULL | NULL     |
| 234236 | NULL | NULL     |
| 234237 | NULL | NULL     |
+--------+------+----------+
3 rows in set (0.00 sec)

mysql> select * from record_repeat;
+--------+---------------------+
| id     | occ_time            |
+--------+---------------------+
| 234234 | 2016-06-02 11:23:35 |
| 234237 | 2016-06-02 11:23:49 |
+--------+---------------------+
2 rows in set (0.00 sec)

mysql>

发生重复插入的数据都记录到 record_repeat 表中了

mysql 存储过程异常处理

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