所有
使用版本Nhibernate 3.3.3 GA。
我创建的HQL未正确转换为SQL。特别， 其中一个左连接（在plan：Job_Plans表和除法：Code_Plan_Division_Types表之间）最终作为where子句中的内连接。
换句话说，而不是：
...
from Job_Info project_0_
left outer join Job_Plans planlist5_ on project_0_.entity_id=planlist5_.job_id
left outer join Code_Plan_Division_Types plandivisi18_ on planlist5_.division_id=plandivisi18_.entity_id
我明白了：
...
from Job_Info project_0_
left outer join Job_Plans planlist5_ on project_0_.entity_id=planlist5_.job_id,
Code_Plan_Division_Types plandivisi18_
where
planlist5_.division_id=plandivisi18_.entity_id
以下是我的完整查询：
HQL：
select p, plans from Project_ p
inner join fetch p.Client
inner join fetch p.ProjectType
left join fetch p.Office
left join fetch p.Region
left join p.PlanList plans
left join fetch plans.PlanType
left join fetch plans.ProjectType
left join fetch plans.Quadrant
left join fetch plans.Division
left join fetch plans.County
left join fetch plans.Municipality
left join fetch plans.Township
where p.id in ( select p.id
from Project_ p
left join p.PlanList plans
left join p.ReferencePlanList rplans
left join p.AddressList addr
left join p.ImageSets imgs
where p.Status = true and p.Region.Id = :region)
and plans.PlanNumber like :planNo
order by plans.PlanNumber asc, plans.Division.Code asc, replace((coalesce(plans.Lot, '')+coalesce(plans.PartLot, '')), '-', ' ') asc, replace((coalesce(plans.Block, '')+coalesce(plans.PartBlock, '')), '-', ' ') asc
生成的SQL：
select TOP (100)
project_0_.entity_id as entity1_20_0_, planlist5_.entity_id as entity1_76_1_, client_1_.entity_id as entity1_11_2_, projecttyp2_.entity_id as entity1_54_3_, office_3_.entity_id as entity1_55_4_, region_4_.entity_id as entity1_1_5_, plantype_6_.entity_id as entity1_21_6_, projecttyp7_.entity_id as entity1_54_7_, quadrant_8_.entity_id as entity1_2_8_, plandivisi9_.entity_id as entity1_12_9_, county_10_.entity_id as entity1_22_10_, municipali11_.entity_id as entity1_3_11_, township_12_.entity_id as entity1_30_12_, project_0_.plan_attached as plan2_20_0_, project_0_.notes_attached as notes3_20_0_, project_0_.status as status20_0_, project_0_.file_number as file5_20_0_, project_0_.order_date as order6_20_0_, project_0_.due_date as due7_20_0_, project_0_.due_date_fw as due8_20_0_, project_0_.lock_status as lock9_20_0_, project_0_.currency_code as currency10_20_0_, project_0_.client_reference as client11_20_0_, project_0_.pin as pin20_0_, project_0_.office_id as office13_20_0_, project_0_.job_type_id as job14_20_0_, project_0_.client_entity_id as client15_20_0_, project_0_.region_id as region16_20_0_, planlist5_.lot as lot76_1_, planlist5_.part_lot as part3_76_1_, planlist5_.lot_search as lot4_76_1_, planlist5_.block as block76_1_, planlist5_.part_block as part6_76_1_, planlist5_.plan_number as plan7_76_1_, planlist5_.section_num as section8_76_1_, planlist5_.township as township76_1_, planlist5_.range_num as range10_76_1_, planlist5_.meridian_id as meridian11_76_1_, planlist5_.job_id as job12_76_1_, planlist5_.plan_id as plan13_76_1_, planlist5_.job_type_id as job14_76_1_, planlist5_.quadrant_id as quadrant15_76_1_, planlist5_.division_id as division16_76_1_, planlist5_.county_id as county17_76_1_, planlist5_.municipality_id as municip18_76_1_, planlist5_.township_id as township19_76_1_, client_1_.status as status11_2_, client_1_.client_number as client3_11_2_, client_1_.client_name as client4_11_2_, projecttyp2_.name as name54_3_, projecttyp2_.description as descript3_54_3_, office_3_.name as name55_4_, office_3_.description as descript3_55_4_, region_4_.name as name1_5_, region_4_.description as descript7_1_5_, region_4_.country_id as country8_1_5_, plantype_6_.name as name21_6_, plantype_6_.description as descript3_21_6_, plantype_6_.display as display21_6_, projecttyp7_.name as name54_7_, projecttyp7_.description as descript3_54_7_, quadrant_8_.name as name2_8_, quadrant_8_.description as descript7_2_8_, plandivisi9_.name as name12_9_, plandivisi9_.description as descript7_12_9_, plandivisi9_.display as display12_9_, county_10_.name as name22_10_, county_10_.description as descript3_22_10_, county_10_.region_id as region4_22_10_, municipali11_.name as name3_11_, municipali11_.description as descript7_3_11_, municipali11_.county_id as county11_3_11_, township_12_.name as name30_12_, township_12_.description as descript3_30_12_, township_12_.county_id as county4_30_12_
from Job_Info project_0_
inner join Companies client_1_ on project_0_.client_entity_id=client_1_.entity_id
inner join Code_Job_Types projecttyp2_ on project_0_.job_type_id=projecttyp2_.entity_id
left outer join code_office_types office_3_ on project_0_.office_id=office_3_.entity_id
left outer join Code_Region_Types region_4_ on project_0_.region_id=region_4_.entity_id
left outer join Job_Plans planlist5_ on project_0_.entity_id=planlist5_.job_id
left outer join Code_Plan_ID_Types plantype_6_ on planlist5_.plan_id=plantype_6_.entity_id
left outer join Code_Job_Types projecttyp7_ on planlist5_.job_type_id=projecttyp7_.entity_id
left outer join Code_Quadrant_Types quadrant_8_ on planlist5_.quadrant_id=quadrant_8_.entity_id
left outer join Code_Plan_Division_Types plandivisi9_ on planlist5_.division_id=plandivisi9_.entity_id
left outer join code_county_types county_10_ on planlist5_.county_id=county_10_.entity_id
left outer join Code_Municipality_Types municipali11_ on planlist5_.municipality_id=municipali11_.entity_id
left outer join Code_Township_Types township_12_ on planlist5_.township_id=township_12_.entity_id,
Code_Plan_Division_Types plandivisi18_
where planlist5_.division_id=plandivisi18_.entity_id
and (project_0_.entity_id in
(select project_13_.entity_id
from Job_Info project_13_
left outer join Job_Plans planlist14_ on project_13_.entity_id=planlist14_.job_id
left outer join Job_Underlying_Rplan referencep15_ on project_13_.entity_id=referencep15_.job_id
left outer join Job_Address addresslis16_ on project_13_.entity_id=addresslis16_.JobId
left outer join Job_Images_Set imagesets17_ on project_13_.entity_id=imagesets17_.job_id
where project_13_.status=1 and project_13_.region_id=1))
and (planlist5_.plan_number like '%plan%')
order by planlist5_.plan_number asc, plandivisi18_.name asc, replace(coalesce(planlist5_.lot, '')+coalesce(planlist5_.part_lot, ''), '-', ' ') asc, replace(coalesce(planlist5_.block, '')+coalesce(planlist5_.part_block, ''), '-', ' ') asc
更新 找到原因：由于“fetch”关键字，我不应该在我的订单中引用plans.Division.Code（甚至where子句）。有关详细信息，请参阅答案。
原因是order by子句。通过从查询顺序中删除plans.Division.Code现在是正确的。更改的订单：
HQL：
order by plans.PlanNumber asc, replace((coalesce(plans.Lot, '')+coalesce(plans.PartLot, '')), '-', ' ') asc, replace((coalesce(plans.Block, '')+coalesce(plans.PartBlock, '')), '-', ' ') asc
生成的SQL：
order by planlist5_.plan_number asc, replace(coalesce(planlist5_.lot, '')+coalesce(planlist5_.part_lot, ''), '-', ' ') asc, replace(coalesce(planlist5_.block, '')+coalesce(planlist5_.part_block, ''), '-', ' ') asc
答案 0 :(得分：0)
This is more of a work around, not a fix. Because referencing division entity in the order by caused this issue, I decided to create another (redundant) join to the same division entity (as non-fetch join so it doesn't appear in the select) with an alias 'div'. Then I used the alias in the order by.
order by plans.PlanNumber asc, div.Code
This trick was good enough to resolve the issue. I hope this is fixed in nhibernate. Btw, this issue is still there as of 3.4.1 GA. I cannot use the 4.x version because I am tied to .net 2.0 currently.
UPDATE: OK, it turns out its not a bug,- I was using the "fetch" keyword w/ things I should not be using.
Here's an answer to my question from NHibernate groups:
According to the Hibernate docs: "A fetch join does not usually need to assign an alias, because the associated objects should not be used in the where clause (or any other clause)."
The main reason is that a "fetch" is meant eager load and hydrate an object, and such a collection should not be filtered, since then your object will be in an inconsistent state.