得到错误 org.hibernate.HibernateException：命名查询中的错误：customers.amountDeposit，customers.amountWithdraw答案

【问题标题】：Got error org.hibernate.HibernateException: Errors in named queries: customers.amountDeposit, customers.amountWithdraw得到错误 org.hibernate.HibernateException：命名查询中的错误：customers.amountDeposit，customers.amountWithdraw
【发布时间】：2021-10-18 03:53:35
【问题描述】：

我在命名查询中遇到问题得到错误org.hibernate.HibernateException：命名查询中的错误：customers.amountDeposit、customers.amountWithdraw

这是我的命名查询金额存款和取款以及金额存款和金额取款的DAO实现，第一次尝试，我可以说我是初学者

    @NamedQueries   ({  
    @NamedQuery(name="customers.amountWithdraw", query="update customers set customerBalance = customerBalance - :amount where :customerAccNo"),
    @NamedQuery(name="customers.amountDeposit", query="update customers set customerBalance = customerBalance + :amount where :customerAccNo" )})

这是我的 DAO 实现

    public Customer amountWithdraw(Customer customer,double amount) {
            customer=(Customer) session.get(Customer.class, customer.getCustomerAccNo());
            if(customer!=null) {
            Query query = session.getNamedQuery("customers.amountWithdraw");
            query.setParameter("customerBalance",customer.getCustomerBalance());        
            query.setParameter("amount", amount );
            query.setParameter("customerAccNo",customer.getCustomerAccNo());
            query.executeUpdate();
            customer=getCustomerByAccNo(customer.getCustomerAccNo());
            return customer;
            }
            return null;
        }
    
        public Customer amountDeposit(Customer customer, double amount) {   
            customer=(Customer) session.get(Customer.class, customer.getCustomerAccNo());
            if(customer!=null) {
            Query query = session.getNamedQuery("customers.amountDeposit"); 
            query.setParameter("customerBalance",customer.getCustomerBalance());
            query.setParameter("amount", amount );
            query.setParameter("customerAccNo",customer.getCustomerAccNo());
            query.executeUpdate();
            customer=getCustomerByAccNo(customer.getCustomerAccNo());       
            return customer;
            }
            return null;        
        }

【问题讨论】：

标签： java hibernate dao named-query

【解决方案1】：

显然where :customerAccNo 不是一个有效的谓词。您必须使用运算符将该参数与某些列/字段进行比较，例如= 等于运算符，使其成为适当的谓词。使用这个：

@NamedQueries   ({  
    @NamedQuery(name="customers.amountWithdraw", query="update customers set customerBalance = customerBalance - :amount where customerAccNo = :customerAccNo"),
    @NamedQuery(name="customers.amountDeposit", query="update customers set customerBalance = customerBalance + :amount where customerAccNo = :customerAccNo" )})

【讨论】：