mysqldup
DUPlicate a database within the same mysql server
Every now and then a guy needs to clone a DB to make test a batch of schema changes before running that in the real DB.
Most documentation online implies that even if you want to clone the database inside the same MySQL instance, you still have to use mysqldump, create the new DB and import that in the new DB.
That sounds quite inefficient so after checking out this guy's script, mysqldump was born.
Instalation
Use go get:
go get github.com/fopina/mysqldup
Or download a pre-built binary from releases.
Usage
$ ./mysqldup --help
Usage: ./mysqldup [OPTIONS] OLD_DB_NAME NEW_DB_NAME
-f, --force drop NEW_DB_NAME if it already exists
--help this screen
-h, --hostname string connect to host (default "127.0.0.1")
-p, --password use password when connecting to server (read from tty)
--password-file string use password when connecting to server (read from file)
-P, --port int port number to use for connection (default 3306)
-u, --user string user for login (default "root")
-V, --version output version information and exit
Example
$ ./mysqldup -f -h remote.mysql.local -u superuser --password-file secret_password.txt prod prod_clone
281 tables to clone
[1 / 281] cloning super_secret_passwords
[2 / 281] cloning all_customer_pii
...
[280 / 281] cloning gdpr_fines
[281 / 281] cloning customer_closure_notice
This (real life) example took 5min while mysqldump | mysql took 15min.