mysql> show variables like '%secure%';
+--------------------------+-----------------------+
| Variable_name | Value |
+--------------------------+-----------------------+
| require_secure_transport | OFF |
| secure_auth | ON |
| secure_file_priv | /var/lib/mysql-files/ |
+--------------------------+-----------------------+
3 rows in set (0.27 sec)
mysql> select * from test into outfile '/var/lib/mysql-files/test_out.txt' fields terminated by ',' optionally enclo
sed by '"';
Query OK, 5 rows affected (0.21 sec)
secure_file_priv参数说明：
这个参数用来限制数据导入和导出操作的效果，例如执行LOAD DATA、SELECT ... INTO OUTFILE语句和LOAD_FILE()函数。这些操作需要用户具有FILE权限。
1. 如果这个参数为空，这个变量没有效果；
2. 如果这个参数设为一个目录名，MySQL服务只允许在这个目录中执行文件的导入和导出操作。这个目录必须存在，MyS
QL服务不会创建它；
3. 如果这个参数为NULL，MySQL服务会禁止导入和导出操作。这个参数在MySQL 5.7.6版本引入
secure_file_priv may be set as follows:
If empty, the variable has no effect. This is not a secure setting.
If set to the name of a directory, the server limits import and export operations to work only with files in that dire
ctory. The directory must exist; the server will not create it.
If set to NULL, the server disables import and export operations.
