hi

i'm trying to map a subclass i use the table-per-subclass strategy the super class maps ok but when i wanna map the subclass i get this errors


Exception in thread "main" org.hibernate.exception.SQLGrammarException: could not update: [org.hibernate.inheritance.test.FacturaCompra#4]
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:65)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2222)
at org.hibernate.persister.entity.AbstractEntityPersister.updateOrInsert(AbstractEntityPersister.java:2118)
at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2374)
at org.hibernate.action.EntityUpdateAction.execute(EntityUpdateAction.java:84)
at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:243)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:227)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:141)
at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:296)
at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27)
at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1007)
at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:354)
at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:106)
at salida.testing.main(testing.java:35)
Caused by: java.sql.SQLException: [Microsoft][SQLServer 2000 Driver for JDBC]Invalid parameter binding(s).
at com.microsoft.jdbc.base.BaseExceptions.createException(Unknown Source)
at com.microsoft.jdbc.base.BaseExceptions.getException(Unknown Source)
at com.microsoft.jdbc.base.BasePreparedStatement.validateParameters(Unknown Source)
at com.microsoft.jdbc.base.BasePreparedStatement.validateParameters(Unknown Source)
at com.microsoft.jdbc.base.BasePreparedStatement.preImplExecute(Unknown Source)
at com.microsoft.jdbc.base.BaseStatement.commonExecute(Unknown Source)
at com.microsoft.jdbc.base.BaseStatement.executeUpdateInternal(Unknown Source)
at com.microsoft.jdbc.base.BasePreparedStatement.executeUpdate(Unknown Source)
at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2208)
... 12 more


could you please help as quickly as you can????

It's difficult to tell what your problem is without more information, specifically a trimmed down example of your mapping files, when the exception occurs, and the versions of Hibernate, Java, and your underlying database.

Check out the suggestions on how to ask for help.

ok sorry i am using hibernate tools 3.1.0 beta5, JDk5
and my hierrachy is like this

class A{
//attributes

//getters and setters
}

class B extendes A{

//it owns methods
}

and when i try to do this

B b = new B();
b.setSTH();


session.save(b);
tx.commit();
session.close();
iget that error

However when i do the same for the class A can can persit it could anybody tellme waht i must do?

You still did not post your mapping files so I cannot give specific advice. Look at section 9.1.2 in the reference doc. All of Chapter 9 would be good to read as it describes various ways to deal with inheritance. In case you don't have the doc here is the table per subclass example copied from the doc:



I have not actually used this approach. I used table per class hierarchy, which works fine for me. Since the example does not show the class definitions it's a bit unclear how they look. The confusing issue to me is the id property. It appears that the id in the superclass is used for each of the subclasses. There's a similar example in the book Hibernate in Action that shows different ids for each subclass.

I suggest you play around with this example and use hbm2ddl to generate the DDL for the tables. Then go the other way and generate the Java. That should be instructive.

Good luck.