Hibernate 问题

一 get the list of buyers加上left join不会出现问题

Criteria crit = getSession().createCriteria(Buyer.class, "b");
if(!lastName.equalsIgnoreCase("") || !email.equalsIgnoreCase("")){
crit.createCriteria("users", "u", Criteria.LEFT_JOIN)
.add(Restrictions.eqProperty("b.id", "u.buyer.id"));
}

一 get the total records of buyers加上left join 会出现问题，好像
  buyer, user  hibernate会自动连接

Criteria crit = getSession().createCriteria(Buyer.class, "b");
crit.setProjection(Projections.rowCount());

if(!lastName.equalsIgnoreCase("") || !email.equalsIgnoreCase("")){
crit.createCriteria("users", "u");
}




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ForwarderDAO.java line:244
table: forwarder, forwarder_inquiry_departure_country,
                  forwarder_inquiry_arrival_country,
       country
4个表，
   用拉2个left join好像不行（in hibernate）
只能用full join( why ?) 


//////////////////////

crit.createAlias("inquiryDepartureCountry", "idcList", Criteria.FULL_JOIN);
crit.createAlias("inquiryArrivalCountry", "iacList", Criteria.FULL_JOIN);