How to force truncate all tables(which are all innodb) in a database in MySQL?

I think I get foreign key constraint error when I try to truncate innodb tables. I was not having problems with this when using MyISAM.

Is there an easy way to开发者_如何学编程 force truncate all tables? Or should I just make a script to drop the database, create new one and then create the tables from scratch?

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About the FK constraints, you could disable them with next statements -

SET FOREIGN_KEY_CHECKS = 0;
...DML statements
SET FOREIGN_KEY_CHECKS = 1; -- enable checking

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If you have foreign key problems during your operation you can:

ALTER TABLE tablename DISABLE KEYS

then do your business, and afterwards re-enable keys with:

ALTER TABLE tablename ENABLE KEYS

This techinique is used in MySQL dumps.