本文介绍了基本Hibernate选择所有语法的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我尝试使用hibernate从数据库检索数据,但它仍然引发异常
I am trying to retrieve data from my database with hibernate but it keeps throwing an exception
@Override
public List<Trade> requestPeriod() {
List<Trade> trades = null;
EntityManager manager = emf.createEntityManager();
Query query = manager.createQuery("from trade");
try{
trades = query.getResultList();
}
catch(PersistenceException e){
logger.error("there was an error " + e);
}
catch(SQLGrammarException e){
logger.error("there was an error " + e);
}
return trades;
}
我猜我使用的语法 select
I am guessing the syntax I am using for select all
is incorrect but after looking around I can not see an alternative?
感谢
推荐答案
应该是来自Trade
(大写T),因为Trade是映射类的名称。
It should be "from Trade"
(uppercase T) as Trade is the name of the mapped class.
这篇关于基本Hibernate选择所有语法的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!