目前我正在开发一个具有相当扩展的数据模型的项目。如果我获取单个实体，我会收到 SQLGrammerException 并且生成的查询不是有效的 SQL。也许我正在挑战极限，但也可能我做错了什么。
实体定义如下:
实体:表单
@Entity(name = "Form")
public class Form {
@OneToMany(fetch = FetchType.LAZY, cascade = CascadeType.ALL)
@MapKey(name = "id")
@Fetch(FetchMode.SELECT)
private Map<Integer, FormElement> elements = new HashMap<Integer, FormElement>();
}
实体:FormElement
@Entity(name = "FormElement")
@Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
@Inheritance(strategy = InheritanceType.JOINED)
@DisplayProperty(displayProperty1 = "name")
public abstract class FormElement extends TranslatableIdentityIdEntity<Integer, FormElementTranslation> {
}
实体:TranslatableIdentityIdEntity
@MappedSuperclass
public abstract class TranslatableIdentityIdEntity<ID extends Serializable, TRANSLATE_ENTITY extends Translation<ID>>
extends IdentityIdEntity<ID> implements Translatable<ID, TRANSLATE_ENTITY> {
@org.hibernate.annotations.Cascade(org.hibernate.annotations.CascadeType.DELETE_ORPHAN)
@OneToMany(mappedBy = "owner", cascade = CascadeType.ALL, fetch = FetchType.EAGER)
@org.hibernate.annotations.Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
@MapKey(name = "language")
@org.hibernate.annotations.Fetch(FetchMode.SUBSELECT)
private Map<Language, TRANSLATE_ENTITY> translations = MapUtils.lazyMap(new HashMap<Language, TRANSLATE_ENTITY>(),
new TranslationTransformer());
}
实体:FormElementText
@Entity(name = "FormElementText")
@Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
public class FormElementText extends FormElement {
}
生成的 SQL
Hibernate:
select
form0_.id as id71_0_,
form0_.version as version71_0_,
form0_.confirmationText as confirma3_71_0_,
form0_.dateCreated as dateCrea4_71_0_,
form0_.description as descript5_71_0_,
form0_.elementClass as elementC6_71_0_,
form0_.elementIdentifier as elementI7_71_0_,
form0_.formGrid_id as formGrid11_71_0_,
form0_.formRendererClassName as formRend8_71_0_,
form0_.name as name71_0_,
form0_.showLabelsInField as showLab10_71_0_
from
showdown.Form form0_
where
form0_.id=?
Hibernate:
select
context0_.name as name7_1_,
context0_.version as version7_1_,
context0_.groupId as groupId7_1_,
context0_.remark as remark7_1_,
context0_.value as value7_1_,
contextgro1_.id as id2_0_,
contextgro1_.version as version2_0_,
contextgro1_.name as name2_0_
from
showdown.Context context0_
left outer join
showdown.ContextGroup contextgro1_
on context0_.groupId=contextgro1_.id
where
context0_.name=?
Hibernate:
select
elements0_.Form_id as Form1_71_1_,
elements0_.elements_id as elements2_1_,
(select
a5.id
from
FormElement a5
where
a5.id=elements0_.elements_id) as formula0_1_,
formelemen1_.id as id73_0_,
formelemen1_.version as version73_0_,
formelemen1_.elementClass as elementC3_73_0_,
formelemen1_.elementIdentifier as elementI4_73_0_,
formelemen1_.elementType as elementT5_73_0_,
formelemen1_.formElementGridPosition_id as formElem7_73_0_,
formelemen1_.name as name73_0_,
formelemen1_1_.fieldSize as fieldSize74_0_,
formelemen1_1_.readOnly as readOnly74_0_,
formelemen1_2_.columns as columns75_0_,
formelemen1_2_.readOnly as readOnly75_0_,
formelemen1_2_.rows as rows75_0_,
formelemen1_4_.multipleValues as multiple1_78_0_,
formelemen1_4_.valueSet_id as valueSet3_78_0_,
formelemen1_5_.multipleValues as multiple1_79_0_,
formelemen1_5_.valueSet_id as valueSet3_79_0_,
formelemen1_6_.multipleValues as multiple1_80_0_,
formelemen1_6_.valueSet_id as valueSet3_80_0_,
case
when formelemen1_1_.id is not null then 1
when formelemen1_2_.id is not null then 2
when formelemen1_3_.id is not null then 3
when formelemen1_4_.id is not null then 4
when formelemen1_5_.id is not null then 5
when formelemen1_6_.id is not null then 6
when formelemen1_.id is not null then 0
end as clazz_0_
from
showdown.Form_FormElement elements0_
inner join
showdown.FormElement formelemen1_
on elements0_.elements_id=formelemen1_.id
left outer join
showdown.FormElementText formelemen1_1_
on formelemen1_.id=formelemen1_1_.id
left outer join
showdown.FormElementTextarea formelemen1_2_
on formelemen1_.id=formelemen1_2_.id
left outer join
showdown.FormElementSubmit formelemen1_3_
on formelemen1_.id=formelemen1_3_.id
left outer join
showdown.FormElementRadio formelemen1_4_
on formelemen1_.id=formelemen1_4_.id
left outer join
showdown.FormElementSelect formelemen1_5_
on formelemen1_.id=formelemen1_5_.id
left outer join
showdown.FormElementCheckbox formelemen1_6_
on formelemen1_.id=formelemen1_6_.id
where
elements0_.Form_id=?
Hibernate:
select
translatio0_.owner_id as owner6_73_2_,
translatio0_.id as id2_,
translatio0_.language_langId as formula9_2_,
translatio0_.id as id84_1_,
translatio0_.version as version84_1_,
translatio0_.language_langId as language5_84_1_,
translatio0_.label as label84_1_,
translatio0_.owner_id as owner6_84_1_,
translatio0_.tooltipMessage as tooltipM4_84_1_,
language1_.langId as langId12_0_,
language1_.version as version12_0_,
language1_.directory as directory12_0_,
language1_.isoLang as isoLang12_0_,
language1_.language as language12_0_,
language1_.latin as latin12_0_,
language1_.nativeName as nativeName12_0_
from
showdown.FormElementTranslation translatio0_
inner join
showdown.Language language1_
on translatio0_.language_langId=language1_.langId
where
translatio0_.owner_id in (
select
formelemen1_.id
from
FormElement a5
where
a5.id=elements0_.elements_id
) as formula0_1_, formelemen1_.id as id73_0_, formelemen1_.version as version73_0_, formelemen1_.elementClass as elementC3_73_0_, formelemen1_.elementIdentifier as elementI4_73_0_, formelemen1_.elementType as elementT5_73_0_, formelemen1_.formElementGridPosition_id as formElem7_73_0_, formelemen1_.name as name73_0_, formelemen1_1_.fieldSize as fieldSize74_0_, formelemen1_1_.readOnly as readOnly74_0_, formelemen1_2_.columns as columns75_0_, formelemen1_2_.readOnly as readOnly75_0_, formelemen1_2_.rows as rows75_0_, formelemen1_4_.multipleValues as multiple1_78_0_, formelemen1_4_.valueSet_id as valueSet3_78_0_, formelemen1_5_.multipleValues as multiple1_79_0_, formelemen1_5_.valueSet_id as valueSet3_79_0_, formelemen1_6_.multipleValues as multiple1_80_0_, formelemen1_6_.valueSet_id as valueSet3_80_0_, case
when formelemen1_1_.id is not null then 1
when formelemen1_2_.id is not null then 2
when formelemen1_3_.id is not null then 3
when formelemen1_4_.id is not null then 4
when formelemen1_5_.id is not null then 5
when formelemen1_6_.id is not null then 6
when formelemen1_.id is not null then 0
end as clazz_0_
from
showdown.Form_FormElement elements0_
inner join
showdown.FormElement formelemen1_
on elements0_.elements_id=formelemen1_.id
left outer join
showdown.FormElementText formelemen1_1_
on formelemen1_.id=formelemen1_1_.id
left outer join
showdown.FormElementTextarea formelemen1_2_
on formelemen1_.id=formelemen1_2_.id
left outer join
showdown.FormElementSubmit formelemen1_3_
on formelemen1_.id=formelemen1_3_.id
left outer join
showdown.FormElementRadio formelemen1_4_
on formelemen1_.id=formelemen1_4_.id
left outer join
showdown.FormElementSelect formelemen1_5_
on formelemen1_.id=formelemen1_5_.id
left outer join
showdown.FormElementCheckbox formelemen1_6_
on formelemen1_.id=formelemen1_6_.id
where
elements0_.Form_id=?
)
2011-10-06 07:45:25,525 [http-8080-Processor20] WARN org.hibernate.util.JDBCExceptionReporter - SQL Error: 102, SQLState: 42W04
2011-10-06 07:45:25,525 [http-8080-Processor20] ERROR org.hibernate.util.JDBCExceptionReporter - ASA Error -131: Syntax error near 'as' on line 1
Hibernate:
select
translatio0_.owner_id as owner6_73_2_,
translatio0_.id as id2_,
translatio0_.language_langId as formula9_2_,
translatio0_.id as id84_1_,
translatio0_.version as version84_1_,
translatio0_.language_langId as language5_84_1_,
translatio0_.label as label84_1_,
translatio0_.owner_id as owner6_84_1_,
translatio0_.tooltipMessage as tooltipM4_84_1_,
language1_.langId as langId12_0_,
language1_.version as version12_0_,
language1_.directory as directory12_0_,
language1_.isoLang as isoLang12_0_,
language1_.language as language12_0_,
language1_.latin as latin12_0_,
language1_.nativeName as nativeName12_0_
from
showdown.FormElementTranslation translatio0_
inner join
showdown.Language language1_
on translatio0_.language_langId=language1_.langId
where
translatio0_.owner_id in (
select
formelemen1_.id
from
FormElement a5
where
a5.id=elements0_.elements_id
) as formula0_1_, formelemen1_.id as id73_0_, formelemen1_.version as version73_0_, formelemen1_.elementClass as elementC3_73_0_, formelemen1_.elementIdentifier as elementI4_73_0_, formelemen1_.elementType as elementT5_73_0_, formelemen1_.formElementGridPosition_id as formElem7_73_0_, formelemen1_.name as name73_0_, formelemen1_1_.fieldSize as fieldSize74_0_, formelemen1_1_.readOnly as readOnly74_0_, formelemen1_2_.columns as columns75_0_, formelemen1_2_.readOnly as readOnly75_0_, formelemen1_2_.rows as rows75_0_, formelemen1_4_.multipleValues as multiple1_78_0_, formelemen1_4_.valueSet_id as valueSet3_78_0_, formelemen1_5_.multipleValues as multiple1_79_0_, formelemen1_5_.valueSet_id as valueSet3_79_0_, formelemen1_6_.multipleValues as multiple1_80_0_, formelemen1_6_.valueSet_id as valueSet3_80_0_, case
when formelemen1_1_.id is not null then 1
when formelemen1_2_.id is not null then 2
when formelemen1_3_.id is not null then 3
when formelemen1_4_.id is not null then 4
when formelemen1_5_.id is not null then 5
when formelemen1_6_.id is not null then 6
when formelemen1_.id is not null then 0
end as clazz_0_
from
showdown.Form_FormElement elements0_
inner join
showdown.FormElement formelemen1_
on elements0_.elements_id=formelemen1_.id
left outer join
showdown.FormElementText formelemen1_1_
on formelemen1_.id=formelemen1_1_.id
left outer join
showdown.FormElementTextarea formelemen1_2_
on formelemen1_.id=formelemen1_2_.id
left outer join
showdown.FormElementSubmit formelemen1_3_
on formelemen1_.id=formelemen1_3_.id
left outer join
showdown.FormElementRadio formelemen1_4_
on formelemen1_.id=formelemen1_4_.id
left outer join
showdown.FormElementSelect formelemen1_5_
on formelemen1_.id=formelemen1_5_.id
left outer join
showdown.FormElementCheckbox formelemen1_6_
on formelemen1_.id=formelemen1_6_.id
where
elements0_.Form_id=?
)
希望有人能引导我走向正确的方向。提前致谢。
最佳答案
通过为每个用例创建特定查询来修复，以便我们可以控制所有关系的加载。
关于java - Hibernate 使用子选择和连接类生成错误的 SQL 查询，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/7670728/