saveOrUpdate can save a new Object, but
saveOrUpdate can't save a new object? why?

public void testSaveOrUpdate() {

PigeonholeType pigeonholeType = new PigeonholeType();
pigeonholeType.setSymbol("none");
PigeonholeRule pigeonholeRule = new PigeonholeRule();
pigeonholeRule.setXtypeSymbol("SB006");
pigeonholeRule.setSize(new Integer(0));
pigeonholeRule.setPigeonholeType(pigeonholeType);
pigeonholeRuleDao.saveOrUpdate(pigeonholeRule);

}

public Serializable saveOrUpdate(PigeonholeRule obj)
throws HibernateException
{
session = sessionFactory.openSession();
x = session.beginTransaction();
session.saveOrUpdateCopy(obj);
tx.commit();

}

[WARN ] [2005-03-14 11:28:01,750] net.sf.ehcache.config.Configurator - No configuration found. Configuring ehcache from ehcache-failsafe.xml found in the classpath: jar:file:/D:/WORK/fjky-fzgs/project/web/WEB-INF/lib/ehcache-1.1.jar!/ehcache-failsafe.xml
Hibernate: update PIGEONHOLE_RULE set PIGEONHOLE_TYPE_SYMBOL=?, SIZE=? where XTYPE_SYMBOL=?
[ERROR] [2005-03-14 11:28:03,640] net.sf.hibernate.impl.SessionImpl - Could not synchronize database state with session
org.springframework.orm.hibernate.HibernateSystemException: Batch update row count wrong: 0; nested exception is net.sf.hibernate.HibernateException: Batch update row count wrong: 0
net.sf.hibernate.HibernateException: Batch update row count wrong: 0
Hibernate: select pigeonhole0_.XTYPE_SYMBOL as x0_0_ from PIGEONHOLE_RULE pigeonhole0_ where ((pigeonhole0_.XTYPE_SYMBOL=? ))



=============SQLs========================

create table xtype (
symbol varchar(16) not null,
title varchar(30) default 'no title' not null,
note varchar(256),

primary key(symbol)
);


create table pigeonhole_type ( symbol varchar(16) not null,
title varchar(32) not null,
primary key(symbol)
);


create table pigeonhole_rule (
xtype_symbol varchar(16) not null,
pigeonhole_type_symbol varchar(16),
size integer default 1,
primary key(xtype_symbol),
foreign key(xtype_symbol) references xtype(symbol),
foreign key(pigeonhole_type_symbol) references pigeonhole_type(symbol)
);

when use codes it seems no problem, but not insert into database.

session = sessionFactory.openSession();
session.saveOrUpdateCopy(obj);
session.flush();



public void testSaveOrUpdate() {
try {
PigeonholeType pigeonholeType = new PigeonholeType();
pigeonholeType.setSymbol("none");
PigeonholeRule pigeonholeRule = new PigeonholeRule();
pigeonholeRule.setXtypeSymbol("SB006");
pigeonholeRule.setSize(new Integer(456));
pigeonholeRule.setPigeonholeType(pigeonholeType);
pigeonholeRuleDao.saveOrUpdate(pigeonholeRule);

} catch (Exception e) {
e.printStackTrace();
}

PigeonholeRule obj = pigeonholeRuleDao.loadByPrimaryKey("SB006");
System.out.println(obj.getSize());

}



[WARN ] [2005-03-14 11:59:40,015] net.sf.ehcache.config.Configurator - No configuration found. Configuring ehcache from ehcache-failsafe.xml found in the classpath: jar:file:/D:/WORK/fjky-fzgs/project/web/WEB-INF/lib/ehcache-1.1.jar!/ehcache-failsafe.xml
Hibernate: select pigeonhole0_.XTYPE_SYMBOL as XTYPE_SY1_1_, pigeonhole0_.PIGEONHOLE_TYPE_SYMBOL as PIGEONHO2_1_, pigeonhole0_.SIZE as SIZE1_, pigeonhole1_.SYMBOL as SYMBOL0_, pigeonhole1_.TITLE as TITLE0_ from PIGEONHOLE_RULE pigeonhole0_ left outer join PIGEONHOLE_TYPE pigeonhole1_ on pigeonhole0_.PIGEONHOLE_TYPE_SYMBOL=pigeonhole1_.SYMBOL where pigeonhole0_.XTYPE_SYMBOL=?
Hibernate: insert into PIGEONHOLE_RULE (PIGEONHOLE_TYPE_SYMBOL, SIZE, XTYPE_SYMBOL) values (?, ?, ?)
Hibernate: select pigeonhole0_.XTYPE_SYMBOL as x0_0_ from PIGEONHOLE_RULE pigeonhole0_ where ((pigeonhole0_.XTYPE_SYMBOL=? ))
Hibernate: select pigeonhole0_.XTYPE_SYMBOL as XTYPE_SY1_1_, pigeonhole0_.PIGEONHOLE_TYPE_SYMBOL as PIGEONHO2_1_, pigeonhole0_.SIZE as SIZE1_, pigeonhole1_.SYMBOL as SYMBOL0_, pigeonhole1_.TITLE as TITLE0_ from PIGEONHOLE_RULE pigeonhole0_ left outer join PIGEONHOLE_TYPE pigeonhole1_ on pigeonhole0_.PIGEONHOLE_TYPE_SYMBOL=pigeonhole1_.SYMBOL where pigeonhole0_.XTYPE_SYMBOL=?
Hibernate: select setofpigeo0_.PIGEONHOLE_TYPE_SYMBOL as PIGEONHO2___, setofpigeo0_.XTYPE_SYMBOL as XTYPE_SY1___, setofpigeo0_.XTYPE_SYMBOL as XTYPE_SY1_0_, setofpigeo0_.PIGEONHOLE_TYPE_SYMBOL as PIGEONHO2_0_, setofpigeo0_.SIZE as SIZE0_ from PIGEONHOLE_RULE setofpigeo0_ where setofpigeo0_.PIGEONHOLE_TYPE_SYMBOL=?
456