I couldn't find a reference on how to switch hbm2ddl off.
Just omitting hibernate.hbm2ddl.auto
defaults to Hibernate not doing anything. From the reference documentation:
1.1.4. Hibernate configuration
The
hbm2ddl.auto
option turns on automatic generation of database schemas directly into the database. This can also be turned off by removing the configuration option, or redirected to a file with the help of the SchemaExport Ant task.
Setting hbm2ddl.auto
to none
(undocumented) might generate a warning, such as: org.hibernate.cfg.SettingsFactory - Unrecognized value for "hibernate.hbm2ddl.auto": none