ERROR 1290 (HY000): The MySQL server is running with the --secure-file-priv option so it cannot ···

MySQL报错：ERROR 1290 (HY000): The MySQL server is running with the --secure-file-priv option so it cannot execute this statement

1.报错

ERROR 1290 (HY000): The MySQL server is running with the --secure-file-priv option so it cannot execute this statement

2.原因

什么是secure-file-priv，按照字面意思，就是安全的文件权限（pri -> privileges），那么，这个secure-file-priv又是什么玩意儿呢？查看mysql referman，如下：

This option sets the secure_file_priv system variable, which is used to limit the effect of data
import and export operations, such as those performed by the LOAD DATA and SELECT … INTO
OUTFILE statements and the LOAD_FILE() function.

【译：这个选项设置系统变量： secure_file_priv，这个变量被用于限制数据导入的导出操作，诸如执行LOAD DATA以及SELECT ... INTO OUTFILE操作以及LOAD_FILE()函数。 】
那么这个secure_file_priv可以设置的值有哪些呢？其有三个值可以配置，如下：

• If empty, the variable has no effect. This is not a secure setting. 【如果此配置项值为空，则表示没有安全设置】
• If set to the name of a directory, the server limits import and export operations to work only with files in that directory. The directory must exist; the server will not create it.
• If set to NULL, the server disables import and export operations. This value is permitted as of MySQL 5.7.6

查看mysql的该变量值，如下：

mysql> show variables like '%secure_file_priv%';
+------------------+-------+
| Variable_name    | Value |
+------------------+-------+
| secure_file_priv | NULL  |
+------------------+-------+
1 row in set, 1 warning (0.00 sec)

根据上述的NULL值，可以看到是不允许导出（入）到文件。

3.解决办法

在配置文件中，设置secure-file-priv为某个路径即可，如下：

mysql> show variables like '%secure_file_priv%';
+------------------+--------------------------------------------------+
| Variable_name    | Value                                            |
+------------------+--------------------------------------------------+
| secure_file_priv | D:\Program Files\MySQL\MySQL Server 5.7\outfile\ |
+------------------+--------------------------------------------------+
1 row in set, 1 warning (0.00 sec)

4. 结果

再次执行上述的SQL，如下：

mysql> select * from student into outfile 'D:/Program Files/MySQL/MySQL Server 5.7/outfile/student.csv';
Query OK, 2 rows affected (0.00 sec)

查看执行结果如下：