Don't give DROP TABLE privileges to the DB user you use for Grails.

It might also be a good idea to withhold most other privileges (other then INSERT, SELECT, DELETE) in production, as you don't want Grails to automagically do an ALTER TABLE operation that locks an important table for 30 minutes...

Don't give DROP DATABASE or DROP TABLE privileges to the DB user you use for Grails.

It might also be a good idea to withhold most other privileges (other then INSERT, SELECT, DELETE) in production, as you don't want Grails to automagically do an ALTER TABLE operation that locks an important table for 30 minutes...