Question

下面有我的hql：

update User set count = count + ?2 where id = ?1

以下是例外情况：

org.hibernate.hql.internal.ast.QuerySyntaxException: expecting OPEN, found '+' near line 1, column 71 [update com.yitaosoft.edm.common.persist.entity.User set count = count + ? where id = ?]
    at org.hibernate.hql.internal.ast.QuerySyntaxException.convert(QuerySyntaxException.java:54)
    at org.hibernate.hql.internal.ast.QuerySyntaxException.convert(QuerySyntaxException.java:47)
    at org.hibernate.hql.internal.ast.ErrorCounter.throwQueryException(ErrorCounter.java:79)
    at org.hibernate.hql.internal.ast.QueryTranslatorImpl.parse(QueryTranslatorImpl.java:278)
    at org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:182)
    at org.hibernate.hql.internal.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:138)

我想更新用户设置count = count + xx，其中id = xx。但得到了语法错误。为什么？是不是在hql中支持？如何解决这个问题??

Answer 1

问题是fieldname计数;这是一个保留字，应该引用 Expected OPEN表示HQL解析器期望count(<expression>) SQL表达式，而不是count = ...。唯一的解决方案是别名User并强制点缀字段名为：

update User u set u.count = (u.count + ?) where id = ?

Answer 2

Query query = session.createQuery("update User set count = count + :count" +" where id = :Id");
query.setParameter("Id", id);
query.setParameter("count", count);

Hibernate抛出期待的OPEN，发现'+'

2 个答案: