I am upgrading from mariadb5.5 to 10.1. I'm trying to restore the dump file output from 5.5 to 10.1, but I'm suffering from the phenomenon that the first restore always fails, and the restore succeeds after deleting and recreating the database. The content of the error is
ERROR 1449 (HY000) at line 44811: The user specified as a definer ('batch'@'localhost') does not exist
But 'batch'@'localhost' does exist and indeed a second restore succeeds with the same dump file without adding the user. The commands I'm actually using are:
// in mariadb5.5
$ mysqldump -u root -p -x -h localhost -R --opt --quick databasename | gzip > /root/backup_db/databasename.sql.gz
$ mysqldump -u root -p -x -h localhost --allow-keywords mysql | gzip > /root/backup_db/mysql.sql.gz
// After installing mariadb10.1
$ mysql_secure_installation
$ mysql_upgrade -u root -p
$ mysql -u root -p -h localhost
# create database databasename;
# \q
// After decompressing the compressed dump file
$ mysql -u root -p -h localhost mysql < mysql.sql
$ mysql -u root -p -h localhost databasename< databasename.sql // always fails here
$ mysql -u root -p -h localhost
# drop database databasename;
# create database databasename;
# \q
$ mysql -u root -p -h localhost databasename< databasename.sql // success here
Please let me know if there are any possible causes or things to check. Thank you.
Thinking that net_buffer_length is insufficient,
net_buffer_length=1024000
I tried to restore by changing to , but it failed. Max_allowed_packet at that time was
max_allowed_packet=100MB.
When restoring a dump of a mysql
database taken separately (as opposed to --all-databases
which does special handling), a FLUSH PRIVILEGES
is needed to restore that dump to the running configuration of the database.
The mysql_upgrade
, now called mariadb-upgrade
in 10.4+, alters the mysql.*
tables to correspond to the new features of the mariadb version and issues a FLUSH PRIVILEGES
.
So when restoring to a new major version, run mysql_upgrade
after restoring the mysql
database. If restoring to the same version, a FLUSH PRIVILEGES
after restoration is sufficient.