Activiti待办任务查询中基于业务对象的条件查询

  select
    v.*,t.id_ as taskid   
from
    provider v
inner join
    act_ru_execution e on v.id = e.business_key_           
inner join
    act_re_procdef p  on e.proc_def_id_ = p.id_      
inner join
     act_ru_task t on t.proc_inst_id_ = e.proc_inst_id_             
where
    e.parent_id_ is null
and e.business_key_ is not null
and t.assignee_ ='admin'

select
   v.*, t.id_ as taskid   
from
     act_ru_task t
inner join
    act_ru_execution e on  t.proc_inst_id_ = e.proc_inst_id_       
inner join
    act_re_procdef p  on e.proc_def_id_ = p.id_      
left join
      provider v on  v.id = e.business_key_           
where
    e.parent_id_ is null
and e.business_key_ is not null
and t.assignee_ ='admin';

 上面的代码可能有些问题

Hibernate: 
    select
        count(*) as col_0_0_ 
    from
        tpa_claims claims0_ 
    left outer join
        act_hi_procinst historicpr1_ 
            on claims0_.process_instance_id=historicpr1_.id_ 
    left outer join
        act_ru_task tasks2_ 
            on historicpr1_.id_=tasks2_.proc_inst_id_ 
    left outer join
        act_re_procdef processdef4_ 
            on historicpr1_.proc_def_id_=processdef4_.id_ 
    where
        (
            historicpr1_.end_time_ is null
        ) 
        and processdef4_.key_=? 
        and tasks2_.assignee_=?
2012-07-10 17:57:48,834 [http-9999-5] TRACE [org.hibernate.type.descriptor.sql.BasicBinder] - binding parameter [1] as [VARCHAR] - claims
2012-07-10 17:57:48,834 [http-9999-5] TRACE [org.hibernate.type.descriptor.sql.BasicBinder] - binding parameter [2] as [VARCHAR] - 4
Hibernate: 
    select
        * 
    from
        ( select
            claims0_.id as id76_0_,
            tasks2_.id_ as id1_68_1_,
            processdef4_.id_ as id1_66_2_,
            claims0_.process_instance_id as process7_76_0_,
            claims0_.claims_date as claims2_76_0_,
            claims0_.create_date as create3_76_0_,
            claims0_.creator_id as creator4_76_0_,
            claims0_.first_check_id as first8_76_0_,
            claims0_.reality_claim_amount as reality5_76_0_,
            claims0_.remark as remark76_0_,
            tasks2_.assignee_ as assignee2_68_1_,
            tasks2_.create_time_ as create3_68_1_,
            tasks2_.delegation_ as delegation4_68_1_,
            tasks2_.description_ as descript5_68_1_,
            tasks2_.due_date_ as due6_68_1_,
            tasks2_.execution_id_ as execution7_68_1_,
            tasks2_.proc_inst_id_ as proc15_68_1_,
            tasks2_.name_ as name8_68_1_,
            tasks2_.owner_ as owner9_68_1_,
            tasks2_.parent_task_id_ as parent10_68_1_,
            tasks2_.priority_ as priority11_68_1_,
            tasks2_.proc_def_id_ as proc12_68_1_,
            tasks2_.rev_ as rev13_68_1_,
            tasks2_.task_def_key_ as task14_68_1_,
            processdef4_.category_ as category2_66_2_,
            processdef4_.deployment_id_ as deployment3_66_2_,
            processdef4_.dgrm_resource_name_ as dgrm4_66_2_,
            processdef4_.has_start_form_key_ as has5_66_2_,
            processdef4_.key_ as key6_66_2_,
            processdef4_.name_ as name7_66_2_,
            processdef4_.resource_name_ as resource8_66_2_,
            processdef4_.rev_ as rev9_66_2_,
            processdef4_.suspension_state_ as suspension10_66_2_,
            processdef4_.version_ as version11_66_2_ 
        from
            tpa_claims claims0_ 
        left outer join
            act_hi_procinst historicpr1_ 
                on claims0_.process_instance_id=historicpr1_.id_ 
        left outer join
            act_ru_task tasks2_ 
                on historicpr1_.id_=tasks2_.proc_inst_id_ 
        left outer join
            act_re_procdef processdef4_ 
                on historicpr1_.proc_def_id_=processdef4_.id_ 
        where
            (
                historicpr1_.end_time_ is null
            ) 
            and processdef4_.key_=? 
            and tasks2_.assignee_=? 
        order by
            claims0_.id asc ) 
    where
        rownum <= ?                             --感谢 @咖啡兔