如何设置mysql的表不区分你大小写

Linux上安装MySQL默认是数据库的表大小写敏感的。修改很简单，只要该一个mysql的配置文件就可以了。

mysql> show tables;

+--------------------------------------+

| Tables_in_cddl |

+--------------------------------------+

| a1_equipment |

| a1_equipment_batch |

| actionby |

| actionitem |

| actionitemcomments |

| actionitemdetail |

| actionitemstatus |

| cal_cost_element |

| cal_cost_element_stat |

| cal_statistics |

| changeduedate |

| commisstionstartup |

| copq |

| copq_category |

| costbreakdown |

| daily_statistic |

| dbstudy |

| dccddlist |

| define_cost_element |

| djpmomsactivity |

| drawing |

| dsystem_user |

| dtproperties |

| duser_rights |

| edcr |

| edcr_2week |

| edcr_status |

| edcrchild |

| engineering_action_tracking |

| engineering_action_tracking_analysis |

| fincostone |

| fincostonerpt |

| fincosttwo |

| fincosttworpt |

| fincostvariance |

| fincostvariancerpt |

| findataforchar |

| finemployee |

| finemployee20120910 |

| finemployeehist |

| finemployeehistback |

| finexportone |

| finexporttwo |

| finheadcountone |

| finheadcountonerpt |

| finheadcounttwo |

| finheadcounttworpt |

| finheadcountvariance |

| finheadcountvariancerpt |

| finhistversioncomment |

| finposition |

| finpositionhist |

| finpositionhistback |

| finpositon20120910 |

| flight |

| hotel |

| hrcontact |

| hy_temp |

| hyresponsetime |

| impacteddrawingnumber |

| jpmo_temp |

| jpmoresponsetime |

| meeting |

| relatededcrnumber |

| responsibleperson |

| revisedscheduledate |

| sm_temp |

| smresponsetime |

| sparepart |

| sysconstraints |

| syssegments |

| systemparameter |

| table_1_7_1 |

| table_1_7_2 |

| table_1_7_3 |

| table_1_7_3a |

| table_1_7_3b |

| table_1_7_3c |

| table_appendix28 |

| trend |

| trenddetail |

| visitor |

| visitprogram |

| vp_engdeliverablesreport |

+--------------------------------------+

84 rows in set (0.00 sec)

mysql> select count(*) from TREND;

ERROR 1146 (42S02): Table 'cddl.TREND' doesn't exist

从上面可以看出trend表是存在的，只不过是小写的保存在数据库里。

让MYSQL不区分表名大小写的方法其实很简单：

1.用ROOT登录，修改/etc/my.cnf

2.在[mysqld]下加入一行：lower_case_table_names=1

3.重新启动数据库即可

[root@chicago init.d]# vi /etc/my.cnf

[mysqld]

datadir=/var/lib/mysql

socket=/var/lib/mysql/mysql.sock

skip-grant-tables

lower_case_table_names=1

[root@chicago init.d]# service mysql restart

Shutting down MySQL.. [ OK ]

Starting MySQL...................................... [ OK ]

mysql> select count(*) from TREND;

+----------+

| count(*) |

+----------+

| 19 |

+----------+

1 row in set (0.00 sec)

mysql> select count(*) from trend;

+----------+

| count(*) |

+----------+

| 19 |

+----------+

1 row in set (0.00 sec)

从上面可以看出，此时已经不区分大小写了。