Hibernate

Question

我尝试使用休眠来实现 (MySQL)，以创建一个报告，其中包含给定日期每笔交易的票据数量。我认为这非常清楚且自我描述：

select customer.trade, COUNT(*) from customer join note where customer.customer_id=note.customer_id and note.CREATION_TS like '${DATE}%' group by customer.trade;

到目前为止我有这个。 “%”是一个通配符。 :

Query query = session.createQuery(
                    "select new ReportEntry(c.trade, count(*)) from customer as c join note as n where c.id=n.customer.id and n.creationDate like ':creationDate%' group by c.trade;")
                    .setParameter("creationDate", DATE_FORMAT.format(reportDate));

不幸的是我得到：

unexpected token: ':creationDate%'

用 {} 封装不起作用。打开和关闭属性 id 的正确方法是什么？

Answer 1

将“%”放在参数中，而不是查询字符串中。

Query query = session.createQuery(
   "select new ReportEntry(c.trade, count(*)) "
   + "from customer as c join note as n "
   + "where c.id=n.customer.id "
   + "  and n.creationDate ':creationDate' group by c.trade;")
  .setParameter("creationDate", DATE_FORMAT.format(reportDate) + "%");

Hibernate - HQL 参数传递

Hibernate - HQL parameters passing

hql