[MySQL学习]STRICT_ALL_TABLES对应的OUT of RANGE VALUE FOR COLUMN和DATA truncated FOR COLUMN

昨天在存储过程中用了语句insert into a select from b。在应用中发现bigint字段插入到int字段的时候，数值被截断了，插入后已经不是所要的值。因为存储过程中没有用到异常捕捉的处理，所以一开始并未发现错误，只是在比对数据的时候才发现不对。后来比对了两张表，才发现是字段类型不一样。接下来就试着验证了一下（window下的测试环境）。

创建两张表

CREATE TABLE T_INT(id INT ,vname VARCHAR(20));
CREATE TABLE T_BIGINT(id BIGINT ,vname VARCHAR(40));

测试bigint插入到int：如果超过了int的最大值，则直接截成最大值power(2,31)-1。如果是直接在命令行下操作时，会有警告提示。

</pre><p></p><p></p><pre code_snippet_id="397037" snippet_file_name="blog_20140618_3_2598704" name="code" class="sql">INSERT INTO t_int(id,vname)VALUES(POWER(2,31),'0123456789abcdefghij');

SHOW WARNINGS;
1264 OUT of RANGE VALUE FOR COLUMN 'id' AT ROW 1;

SELECT * FROM t_int;
SELECT POWER(2,31)
2147483648
2147483647

测试varchar(40)插入到varchar(20):同样也会直接按照字段最大值截取，命令行下会有警告抛出。

INSERT INTO t_int(id,vname)VALUES(POWER(2,31),'0123456789abcdefghij1');
SHOW WARNINGS;
1264 OUT of RANGE VALUE FOR COLUMN 'id' AT ROW 1;
1265 DATA truncated FOR COLUMN 'vname' AT ROW 1;

id	vname
2147483647	0123456789abcdefghij
2147483647	0123456789abcdefghij

INSERT INTO T_BIGINT(id,vname)VALUES(POWER(2,31),'0123456789abcdefghij1');
INSERT INTO t_int SELECT * FROM t_bigint;

因为我用的是SQLyog，默认的模式是空，所以在这个上面调试的时候，就出问题了。在应用中出错，是因为我的url中没有指定客户端的sql_mode。

/*[17:15:32][  31 ms]*/ SHOW VARIABLES LIKE 'lower_case_table_names';
/*[17:15:32][   0 ms]*/ SET NAMES 'utf8';
/*[17:15:32][   0 ms]*/ SET sql_mode='';
/*[17:15:32][  16 ms]*/ SHOW DATABASES;

在cmd下直接连接MySQL是不会有问题，因为我已经在配置文件中配置了sql_mode。

mysql> INSERT INTO t_int(id,vname)VALUES(POWER(2,31),'0123456789abcdefghij');
ERROR 1264 (22003): Out of range value for column 'id' at row 1
mysql>
mysql> show variables like '%mode%';
+--------------------------+----------------------------------------------------
------------+
| Variable_name            | Value
            |
+--------------------------+----------------------------------------------------
------------+
| innodb_autoinc_lock_mode | 1
            |
| slave_exec_mode          | STRICT
            |
| sql_mode                 | STRICT_TRANS_TABLES,NO_AUTO_CREATE_USER,NO_ENGINE_S
UBSTITUTION |
+--------------------------+----------------------------------------------------
------------+
3 rows in set (0.00 sec)

mysql>

但是如果将insert语句封装到存储过程中，不会报错，只会有有警告。

mysql> call PRO_INSERT();
Query OK, 1 row affected, 3 warnings (0.01 sec)

mysql> select * from t_int;
+------------+----------------------+
| id         | vname                |
+------------+----------------------+
| 2147483647 | 0123456789abcdefghij |
| 2147483647 | 0123456789abcdefghij |
+------------+----------------------+
2 rows in set (0.00 sec)

mysql> set sql_mode='STRICT_ALL_TABLES';
Query OK, 0 rows affected (0.00 sec)

mysql> call PRO_INSERT();
Query OK, 1 row affected, 3 warnings (0.03 sec)

mysql> select * from t_int;
+------------+----------------------+
| id         | vname                |
+------------+----------------------+
| 2147483647 | 0123456789abcdefghij |
| 2147483647 | 0123456789abcdefghij |
| 2147483647 | 0123456789abcdefghij |
| 2147483647 | 0123456789abcdefghij |
+------------+----------------------+
4 rows in set (0.00 sec)

mysql> show variables like '%mode%';
+--------------------------+-------------------+
| Variable_name            | Value             |
+--------------------------+-------------------+
| innodb_autoinc_lock_mode | 1                 |
| slave_exec_mode          | STRICT            |
| sql_mode                 | STRICT_ALL_TABLES |
+--------------------------+-------------------+
3 rows in set (0.00 sec)

mysql>

出问题的原因就是因为sql_mode。还有就是我没有异常处理机制。下一篇先贴一下sql_mode.

解决方案，直接抛错。在存储过程中SET sql_mode=‘STRICT_TRANS_TABLES,NO_ENGINE_SUBSTITUTION‘;（昨天晚听课时叶总提醒，在存储过程中set sql_mode）

mysql> call PRO_INSERT();
Query OK, 1 row affected, 3 warnings (0.01 sec)

mysql> show warnings;
+---------+------+---------------------------------------------+
| Level   | Code | Message                                     |
+---------+------+---------------------------------------------+
| Warning | 1264 | Out of range value for column 'id' at row 1 |
| Warning | 1264 | Out of range value for column 'id' at row 2 |
| Warning | 1265 | Data truncated for column 'vname' at row 2  |
+---------+------+---------------------------------------------+
3 rows in set (0.00 sec)

mysql> call PRO_INSERT();
ERROR 1264 (22003): Out of range value for column 'id' at row 1
mysql>

存储过程

DELIMITER $$

USE `test`$$

DROP PROCEDURE IF EXISTS `PRO_INSERT`$$

CREATE DEFINER=`root`@`%` PROCEDURE `PRO_INSERT`()
BEGIN
SET sql_mode='STRICT_TRANS_TABLES,NO_ENGINE_SUBSTITUTION';
INSERT INTO t_int(id,vname)VALUES(POWER(2,31),'0123456789abcdefghij');
INSERT INTO t_int(id,vname)VALUES(POWER(2,31),'0123456789abcdefghij1');
    END$$

DELIMITER ;

[MySQL学习]STRICT_ALL_TABLES对应的OUT of RANGE VALUE FOR COLUMN和DATA truncated FOR COLUMN