Linux（docker）中 mysql 表名大小寫區分
阿新 • • 發佈：2019-01-02
問題：
在docker中使用mysql，通過sql檔案匯入資料庫的時候，建立的表名都是大寫字母，而程式中都是用的小寫，碰到了下面這種錯誤：
mysql> select * from task_schedule_job;
ERROR 1146 (42S02): Table 'ucenter.task_schedule_job' doesn't exist在網上查到Linux系統中mysql區分大小寫
mysql> show variables like '%low%';
\+----------------------------+--------------------------------------+
| Variable_name 其中 lower_case_table_names 的值是 0
0 代表區分大小寫
1 代表不區分大小寫
（在windows中1 表示不區分大小寫 2表示區分大小寫）
解決：
在配置檔案的[mysqld]後新增lower_case_table_names=1
Linux中的配置檔案應該是在 /etc/mysql/my.cnf
我用的mysql的官方docker映象，在 /etc/mysql/mysql.conf.d/mysqld.cnf
[email protected]:/etc/mysql/mysql.conf.d# cat mysqld.cnf
...
[mysqld]
pid-file = /var/run/mysqld/mysqld.pid
socket = /var/run/mysqld/mysqld.sock
datadir = /var/lib/mysql
...mysql映象用的Debian 系統，沒有安裝vi、vim，安裝vim
root@6a38e59ef95d:/etc/mysql/mysql.conf.d# cat /proc/version
Linux version 4.4.52-boot2docker (root@ed11f485244a) (gcc version 4.9.2 (Debian 4.9.2-10) ) #1 SMP Wed Mar 1 23:41:46 UTC 2017
root@6a38e59ef95d:/etc/mysql/mysql.conf.d# apt-get update
...
root@6a38e59ef95d:/etc/mysql/mysql.conf.d# apt-get install vim
...修改儲存之後重啟mysql服務，不過關閉了mysql容器也跟著關閉瞭如下：
root@6a38e59ef95d:/etc/mysql/mysql.conf.d# service mysql restart
[info] Stopping MySQL Community Server 5.7.17.
docker@default:~$ docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
6a38e59ef95d mysql "docker-entrypoint..." 2 hours ago Exited (0) 44 seconds ago mysql5.7
9e78e89bdd4a ubuntu "/bin/bash" 13 hours ago Exited (0) 13 hours ago kickass_banach啟動容器，進入容器
docker@default:~$ docker start mysql5.7
mysql5.7
docker@default:~$ docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
6a38e59ef95d mysql "docker-entrypoint..." 2 hours ago Up 3 seconds 0.0.0.0:53306->3306/tcp mysql5.7
9e78e89bdd4a ubuntu "/bin/bash" 13 hours ago Exited (0) 13 hours ago kickass_banach
docker@default:~$ docker exec -it mysql5.7 /bin/bash
root@6a38e59ef95d:/# mysql -uroot -p
Enter password: 這時lower_case_table_names 的值 已經改成了1
mysql> show variables like '%low%';
\+----------------------------+--------------------------------------+
| Variable_name | Value |
+----------------------------+--------------------------------------+
| log_slow_admin_statements | OFF |
| log_slow_slave_statements | OFF |
| low_priority_updates | OFF |
| lower_case_file_system | OFF |
| lower_case_table_names | 1 |
| max_allowed_packet | 4194304 |
| slave_allow_batching | OFF |
| slave_max_allowed_packet | 1073741824 |
| slow_launch_time | 2 |
| slow_query_log | OFF |
| slow_query_log_file | /var/lib/mysql/6a38e59ef95d-slow.log |
| transaction_allow_batching | OFF |
+----------------------------+--------------------------------------+
12 rows in set (0.01 sec)但是還是有問題
mysql> select * from task_schedule_job ;
ERROR 1146 (42S02): Table 'ucenter.task_schedule_job' doesn't exist刪除之前的資料庫,出現ERROR 1010 (HY000)錯誤
mysql> drop database ucenter;
ERROR 1010 (HY000): Error dropping database (can't rmdir './ucenter', errno: 39)
mysql> select @@datadir;
+-----------------+
| @@datadir |
+-----------------+
| /var/lib/mysql/ |
+-----------------+
1 row in set (0.00 sec)
直接查詢資料檔案目錄，刪除資料檔案
root@6a38e59ef95d:/# cd /var/lib/mysql
root@6a38e59ef95d:/var/lib/mysql# rm -r -f ucenter