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| Articles > Hibernate > What are the possible values of the Hibernate hbm2ddl.auto configuration | |
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What are the possible values of the Hibernate hbm2ddl.auto configuration
Author: Venkata Sudhakar
Hibernate allows validate, update, create, create-drop and none for hbm2ddl.auto property.
validate: validate the existing schema, makes no changes to the database.
1 | <!--hibernate.cfg.xml --> |
2 | <property name="hbm2ddl.auto">validate</property> |
4 | <!--applicationContext.xml --> |
5 | <property name="hibernateProperties"> |
7 | <prop key="hibernate.hbm2ddl.auto">validate</prop> |
update: update the existing schema.
1 | <!--hibernate.cfg.xml --> |
2 | <property name="hbm2ddl.auto">update</property> |
4 | <!--applicationContext.xml --> |
5 | <property name="hibernateProperties"> |
7 | <prop key="hibernate.hbm2ddl.auto">update</prop> |
create: creates the schema, destroying previous data.
1 | <!--hibernate.cfg.xml --> |
2 | <property name="hbm2ddl.auto">create</property> |
4 | <!--applicationContext.xml --> |
5 | <property name="hibernateProperties"> |
7 | <prop key="hibernate.hbm2ddl.auto">create</prop> |
create-drop: drop the schema when the SessionFactory is closed explicitly, typically when the application is stopped.
1 | <!--hibernate.cfg.xml --> |
2 | <property name="hbm2ddl.auto">create-drop</property> |
4 | <!--applicationContext.xml --> |
5 | <property name="hibernateProperties"> |
7 | <prop key="hibernate.hbm2ddl.auto">create-drop</prop> |
none: does nothing with the schema, makes no changes to the database.
1 | <!--hibernate.cfg.xml --> |
2 | <property name="hbm2ddl.auto">none</property> |
4 | <!--applicationContext.xml --> |
5 | <property name="hibernateProperties"> |
7 | <prop key="hibernate.hbm2ddl.auto">none</prop> |
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