具有外键表约束的备份MySQL模式

Question

I created my MySQL schema that consists of multiple tables and I decided that I would add the foreign key constraints afterwards for each table, using the command:

ALTER TABLE Orders
ADD FOREIGN KEY (P_Id)
REFERENCES Persons(P_Id)

How can I get a backup of the schema (containing the foreign keys) so that I can duplicate it in another machine?

Note that SHOW CREATE TABLE and mysqldump do not work in my case because they only create a UNIQUE KEY constraint and not a FOREIGN KEY.

Answer 1

mysqldump create the dump of foreign keys as well... it adds syntax like:

mysql> SET foreign_key_checks = 0;
mysql> SOURCE dump_file_name;
mysql> SET foreign_key_checks = 1;

You can read the manual at: http://dev.mysql.com/doc/refman/5.6/en/create-table-foreign-keys.html for mysqldump of foreign keys

Answer 2

I come across this often. This is how I do it so I can use 'pv' from the command line to get a progress bar on the sql dump while it restores:

{ echo "SET foreign_key_checks=0;";pv sql.gz; echo "SET foreign_key_checks=1;"; } | mysql dbname

(I put the several commands in { } so that its treated like a single command when being piped to mysql while retaining the progress bar from 'pv' )