mysql> desc tablename; ERROR 1 (HY000): Can't create/write to file '/tmp/#sql_909_0.MYI'

mysql> desc tablename; ERROR 1 (HY000): Can't create/write to file '/tmp/#sql_909_0.MYI' (Errcode: 13)

1	mysql> desc cmstop_picture;

2	ERROR 1 (HY000): Can't create/write to file '/tmp/#sql_909_0.MYI' (Errcode: 13)

解决办法：

1 #mkdir /var/lib/mysql/tmp
2 #chown mysql.mysql /var/lib/mysql/tmp
3 #vi /etc/my.cnf  add [mysqld] tmpdir = /var/lib/mysql/tmp
4 #/etc/init.d/mysqld restart