Disabilita secure priv per il caricamento dei dati su MySQL

Non riesco a riprodurre il problema.

mysql> SELECT VERSION();
+-----------+
| VERSION() |
+-----------+
| 5.7.13    |
+-----------+
1 row in set (0,00 sec)

mysql> SELECT @@GLOBAL.secure_file_priv;
+---------------------------+
| @@GLOBAL.secure_file_priv |
+---------------------------+
| NULL                      |
+---------------------------+
1 row in set (0,00 sec)

-- USE ...

mysql> LOAD DATA INFILE '/var/lib/mysql-files/myfile.csv'
    -> INTO TABLE `test_files`
    -> COLUMNS TERMINATED BY ',' ENCLOSED BY '\"'
    -> LINES TERMINATED BY '\n';
ERROR 1290 (HY000): The MySQL server is running with the --secure-file-priv
option so it cannot execute this statement

Modifica file:/etc/mysql/my.cnf

[mysqld]
.
.
.
secure_file_priv=/var/lib/mysql-files/
.
.
.

Riavvia MySQL.

mysql> SELECT @@GLOBAL.secure_file_priv;
+---------------------------+
| @@GLOBAL.secure_file_priv |
+---------------------------+
| /var/lib/mysql-files/     |
+---------------------------+
1 row in set (0,00 sec)

mysql> LOAD DATA INFILE '/var/lib/mysql-files/myfile.csv'
    -> INTO TABLE `test_files`
    -> COLUMNS TERMINATED BY ',' ENCLOSED BY '\"'
    -> LINES TERMINATED BY '\n';
Query OK, 3 rows affected (0,00 sec)
Records: 3  Deleted: 0  Skipped: 0  Warnings: 0

Vedere 6.1.4 Variabili di sistema del server ::secure_file_priv