在小写 mysql 转储文件的内容后,我在还原具有外键的表时出错。我的目标是小写mysql数据库中的所有结构。尝试恢复数据库时,我使用 vim 将 mysqldump 文件的所有内容小写,这是我得到的错误。
$ mysql -u [user] -p[password] dme < mysqldump.sql
ERROR 1005 (HY000) at line 399: Can't create table 'dme.contacts' (errno: 121)
在任何具有外键约束的表上,还原都会出错。如果我删除每个表的主键后的行,则整个还原工作正常。
我的问题是,是什么原因造成的,我怎样才能在这个过程中保留我的外键?
导致错误的 Lowercased.sql 示例(在 dme.contacts 之前有多个表创建得很好。只有带有外键和约束的表有问题。)
drop table if exists `contacts`; /*!40101 set @saved_cs_client = @@character_set_client */; /*!40101 set character_set_client = utf8 */; create table `contacts` ( `contactid` int(11) not null auto_increment, `firstname` varchar(100) default null, `lastname` varchar(100) not null, `fullname` varchar(200) not null, `dob` datetime default null, `sex` char(1) default null, `voided` datetime default null, `vendorid` int(11) not null, `contacttypeid` int(11) default null, `comments` varchar(1500) default null, primary key (`contactid`), key `fk_contacts_vendors` (`vendorid`), key `fk_contacts_contacttype` (`contacttypeid`), constraint `fk_contacts_contacttype` foreign key (`contacttypeid`) references `contacttype` (`contacttypeid`) on delete no action on update no action, constraint `fk_contacts_vendors` foreign key (`vendorid`) references `vendors` (`vendorid`) on delete no action on update no action ) engine=innodb default charset=utf8; /*!40101 set character_set_client = @saved_cs_client */; -- -- dumping data for table `contacts` -- lock tables `contacts` write; /*!40000 alter table `contacts` disable keys */; /*!40000 alter table `contacts` enable keys */; unlock tables;
来自 mysqldump.sql 的原文(无错误)
-- -- Table structure for table `Contacts` -- DROP TABLE IF EXISTS `Contacts`; /*!40101 SET @saved_cs_client = @@character_set_client */; /*!40101 SET character_set_client = utf8 */; CREATE TABLE `Contacts` ( `ContactId` int(11) NOT NULL AUTO_INCREMENT, `FirstName` varchar(100) DEFAULT NULL, `LastName` varchar(100) NOT NULL, `FullName` varchar(200) NOT NULL, `DOB` datetime DEFAULT NULL, `Sex` char(1) DEFAULT NULL, `Voided` datetime DEFAULT NULL, `VendorID` int(11) NOT NULL, `ContactTypeID` int(11) DEFAULT NULL, `Comments` varchar(1500) DEFAULT NULL, PRIMARY KEY (`ContactId`), KEY `FK_Contacts_Vendors` (`VendorID`), KEY `FK_Contacts_ContactType` (`ContactTypeID`), CONSTRAINT `FK_Contacts_ContactType` FOREIGN KEY (`ContactTypeID`) REFERENCES `ContactType` (`ContactTYpeID`) ON DELETE NO ACTION ON UPDATE NO ACTION, CONSTRAINT `FK_Contacts_Vendors` FOREIGN KEY (`VendorID`) REFERENCES `Vendors` (`VendorId`) ON DELETE NO ACTION ON UPDATE NO ACTION ) ENGINE=InnoDB DEFAULT CHARSET=utf8; /*!40101 SET character_set_client = @saved_cs_client */; -- -- Dumping data for table `Contacts` -- LOCK TABLES `Contacts` WRITE; /*!40000 ALTER TABLE `Contacts` DISABLE KEYS */; /*!40000 ALTER TABLE `Contacts` ENABLE KEYS */; UNLOCK TABLES;