mysqldump problems with restore error: 'Please DISCARD the tablespace before IMPORT'

Question

I run a daily backup mysqldump backup of the production database (mysql version 5.1.66):

mysqldump --user=username --password=secret -C -e --create-options -         


        

Answer 1

Sounds like you have a tablename.ibd but no tablename.frm.

To check:

1. cd to your mysql data directory then the database name.

   cd /var/lib/mysql/database_name

2. Search for the table name that is giving the error.

   ls tablename.*

   You should see two files:

   tablename.ibd
   tablename.frm
   

   But I'm guessing you don't and only see

   tablename.ibd

To fix you have a few options:

1. Add the follow to mysqldump, which will cause the database to be dropped, cleaning up data directory, before restore.

   --add-drop-database

2. Copy the tablename.frm from prod over to dev and then issue a delete table statement.

Also:

• No need to use net_buffer_length=5000 when you're dumping to a file on localhost.
• Other backup solutions - Percona Xtrabackup

Answer 2

I also encountered that problem while dropping a schema and creating it again. I overcome this issue by going C:\ProgramData\MySQL\MySQL Server 5.6\data\my_database_name and deleting the tables which remained from the previous database creation. You can also delete the entire database, if you wish.

Answer 3

I found the easiest way to skip this problem was to manually edit phpmyadmin database dump and edit/change the table that had problems to something else than INNODB. I changed the problem table to ENGINE=MyISAM and voila. Import worked.

CREATE TABLE IF NOT EXISTS `home3_acymailing_tag` (
    `tagid` smallint(5) unsigned NOT NULL AUTO_INCREMENT,
    `name` varchar(250) NOT NULL,
    `userid` int(10) unsigned DEFAULT NULL,
    PRIMARY KEY (`tagid`),
    KEY `useridindex` (`userid`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=1 ;

Answer 4

if you are using XAMPP then first ("stop") MySQL Then go to C:\xampp\mysql\data\dnb where in my case dnb is my database name folder. so then open it and delete .ibd file hence you can only delete it when you already stop MYsql . then go to phpmyadmin 1 click on phpmyadmin . 2 click on databases that appear below (server.127.0.0.1 in your case my be change) 3 then check your database which you want to drop,and click on drop. 4 then you can create database with same name and import your database successfully .here you can see how you drop database from phpmyadmin