明明有select 权限却报错
mysql> select * from server into outfile '/tmp/tt.txt';
ERROR 1045 (28000): Access denied for user 'chenliang'@'%' (using password: YES)

百度后需要给file权限
mysql> grant file on *.* to chenliang;
Query OK, 0 rows affected (0.00 sec)


再次导还是报错
mysql> select * from server into outfile '/tmp/tt.txt';
ERROR 1290 (HY000): The MySQL server is running with the --secure-file-priv option so it cannot execute this statement
--这次错误不一样了，这个错误是一个参数导致的


配置文件加入后重启
secure_file_priv=''


导出成功
mysql> select * from server into outfile '/tmp/tt.txt';
Query OK, 27 rows affected (0.00 sec)


这个参数我以前在5.6.24版本都没调整过，可能默认值就是‘’，高版本默认值改成null，所以一定要注意