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[b]Hibernate version:3.0 [/b]

[b]Mapping documents:[/b]

[b]Code between sessionFactory.openSession() and session.close():[/b]

[b]Full stack trace of any exception that occurs:[/b]

[b]Name and version of the database you are using:Posgresql 8.0 [/b]

[b]The generated SQL (show_sql=true):[/b]

[b]Debug level Hibernate log excerpt:[/b]

Hi, i would like to have some more information concerning the tool schemaExport and schemaUpdate.
Suppose that I've created 2 POJO A and B and their .hbm.xml file. In my ant task I call the 'schemaexport' task, which will create table A and B. I then add some data in both table. If later I add an attribute in class A, I then call the schemaupdate class which will imediately add the new field to table A. Up to now everything is Ok. My problem is that, if I now create a new POJO C and its hbm.xml file and call schemaexport task, the latter will delete my old table A and B and its datas and then create table A, B and C. But I don't want table A and B to be deleted since all my datas will be lost.

Can anyone please help me.
thanks in advance