Hibernate 关于在HQL上使用多个where exists语句的问题

我不得不在GrailsHibernate4上执行一个复杂的查询，所以我决定使用

HQL

。这是我的查询的简化版本（它已经在运行，没有bug）：

---

我发现的第一个问题是：

            and lab.rrType in ('SC')
            group by laa.refNo, laa.amount
            having sum(b.amount) = laa.amount
    )
    and adviceType = 'C' // A newly added condition

当我在

HQL

末尾附加另一个简单子句时，它

抛出一个异常：

URI://分支/检索分支

类：java.lang.NullPointerException

消息：空

乍一看，它应该是有效的。我已经解决了这个问题，将这个新语句放在普通where语句和
exists
语句之间

    and agency.id = :agency
    and branch = :branch
    and str(refNo) like :refNo
    and adviceType = 'C' // Placed it here instead on the last line
    and not exists (
        from AdviceHeader as la, ReportHeader as h
        where h.caRefNo is not null

为什么我不能像在普通查询中一样将其添加到
where
子句的最后一部分？为什么要加在中间呢


在这个场景中，
HQL
的另一个更紧迫的问题是
orderby
子句。基于上面的问题，我有点期待，如果在语句末尾添加，它也会抛出一个错误——尽管我已经尝试过了

            and lab.rrType in ('SC')
            group by laa.refNo, laa.amount
            having sum(b.amount) = laa.amount
    )
    order by refNo asc // I added it obviously on the last part

但正如所料，它也失败了。如果我试着把它放在中间，就像我上面所做的那样，它会犯一个错误，指向错误的<>代码>由< /COD> >子句：

类：QuerySyntaxException

消息：GrailExceptionResolver-处理请求时发生QuerySyntaxException。意外标记

经过一些调试，我发现如果我真的想让
order by
子句工作，我应该删除所有那些
不存在的
子句，这是一个问题。我想指出的是，我的查询工作正常；我唯一缺少的是分类。
是否存在
和
order by
子句不能在一个
HQL
语句上-某种兼容性问题？这是
HQL
的已知限制吗？那些不存在的
语句是怎么回事，它们一直在窃听这个查询和上面的查询


注意：我已经对所有涉及的域类执行了测试，以确定是否存在明显的错误，例如缺少映射、外键约束、标识约束和不匹配的数据类型。简单的
findAll（）
和
createCriteria（）
也可以正常工作。我希望运行的查询是

from AdviceHeader as pa
where adviceType = 'C'
    and rrType = 'SC'
    and agency.id = :agency
    and branch = :branch
    and str(refNo) like :refNo
    and not exists (
        from AdviceHeader as la, ReportHeader as h
        where h.caRefNo is not null
            and h.caRefNo = la.refNo
            and la.refNo2 = pa.refNo
    )
    and not exists (
        from AdviceHeader as laa, AdviceHeader as lab
        where laa.refNo = lab.refNo2
            and laa.refNo = pa.refNo
            and laa.adviceType = 'C'
            and laa.statusCode in ('CL', 'PR')
            and laa.rrType in ('RS')
            and lab.rrType in ('SC')
            group by laa.refNo, laa.amount
            having sum(b.amount) = laa.amount
    )
    and adviceType = 'C' // This should work regardless its position on this where clause
    order by refNo asc // This should only work ON THE LAST PART of the HQL query

from AdviceHeader as pa
where adviceType = 'C'
    and rrType = 'SC'
    and agency.id = :agency
    and branch = :branch
    and str(refNo) like :refNo
    and not exists (
        from AdviceHeader as la, ReportHeader as h
        where h.caRefNo is not null
            and h.caRefNo = la.refNo
            and la.refNo2 = pa.refNo
    )
    and not exists (
        from AdviceHeader as laa, AdviceHeader as lab
        where laa.refNo = lab.refNo2
            and laa.refNo = pa.refNo
            and laa.adviceType = 'C'
            and laa.statusCode in ('CL', 'PR')
            and laa.rrType in ('RS')
            and lab.rrType in ('SC')
            group by laa.refNo, laa.amount
            having sum(b.amount) = laa.amount
    )
    and adviceType = 'C' // This should work regardless its position on this where clause
    order by refNo asc // This should only work ON THE LAST PART of the HQL query