liquibase/liquibase — pull request #191 by ilucker (2013-10-14 23:00:49+00:00)
Title: Disable Foreign Key snapshot generation if Database supports Foreign Key...

It takes to much time to drop all database objects from a very big MySQL Database.
As long as MySQL supports a Disable Foreign Key command a lot of "DROP FOREIGN KEY ..." queries can be avoided by excluding ForeignKey from a set of DatabaseSnapshot objects.