的EclipseLink - 子查询与标准查询（JPA）

采取如给出的以下两个表：的EclipseLink - 子查询与标准查询（JPA）

Objects与objId列，objTaxonId
Taxa与taxValidSynonymId列taxId，taxName（注类群是多个用于分类群）

如果Taxon有效，它的id和validSynonymId是相同的，否则它们是不同的。要找到你“只”需要找到所有类群，其中taxValidSynonymId充满了有效的分类群

我怎样才能得到大家Objects的taxId一分类单元的所有同义词，其中Taxon有一个给定的名称（包括它们的同义词？）在SQL这几行（和分钟完成）

SELECT * 
FROM Objects 
WHERE objTaxonId IN (
    SELECT taxId 
    FROM Taxa 
    WHERE taxName LIKE 'Test Taxon 1' 
     OR taxSynIdTaxon IN(
     SELECT taxId 
     FROM Taxa 
     WHERE taxName LIKE 'Test Taxon 1' 
    ) 
)

我能够制定出内侧部分，在那里我获得类群及其同义词的列表。现在我需要这个Query变换为Subquery ...

String NAME_LIKE = "Test Taxon 1"; 
EntityManager em = EntityManagerProvider.getEntityManager("TestDB"); // get the EntityManager 
CriteriaBuilder cb = em.getCriteriaBuilder(); 
CriteriaQuery<TaxonImpl> cqObject = cb.createQuery(TaxonImpl.class);// 
Root<TaxonImpl> taxonRoot = cqObject.from(TaxonImpl.class);// 
Expression<String> taxon_name = taxonRoot.<String> get("taxName"); 
Predicate where = cb.equal(taxon_name, NAME_LIKE); 
// subquery 
Subquery<Integer> subQuery = cqObject.subquery(Integer.class); 
Root<TaxonImpl> subRoot = subQuery.from(clsImpl); 
subQuery.select(subRoot.<Integer> get("taxId")); 
subQuery.where(cb.equal(subRoot.<String> get("taxName"), NAME_LIKE)); 
where = cb.or(where, taxonRoot.get("taxValidSynonymId").in(subQuery)); 
cqObject.where(where); 
Query query = em.createQuery(cqObject); 
List<TaxonImpl> result = query.getResultList();

注：类群在我的实际应用程序的代码（映射为一个多对一的关系（目标实体TaxonImpl）

来自子查询）将是动态的，所以Native Query不会帮助我。

来源

2017-05-08 lumo

我想出如何“改造”的subquery成query但Eclipselink把我的两个错误

第一个被禁止通过现场访问，当我试图对TaxonImpl结果中（我想，第一，在我的映射文件的Taxon被映射为Entity

在此之后，所以我试图形成SQL 1：1至JPA 但Eclipselink产生奇怪的事情：

SELECT t0.objIdObject, t0.objAdminCreated, t0.objAdminCreator, t0.objAdminEdited, t0.objAdminEditor, t0.objAdminImport1, t0.objAdminImport2, t0.objAddBool1, t0.objAddBool2, t0.objAddBool3, t0.objAddBool4, t0.objAddBool5, t0.objAddDateTime1, t0.objAddDateTime2, t0.objCommonComments, t0.objCommonDescription, t0.objCommonKeywords, t0.objCommonName, t0.objCommonPublished, t0.objCommonPublishedAs, t0.objCommonStatus, t0.objCommonType, t0.objCommonTypustype, t0.objDetAccuracy, t0.objDetCf, t0.objDetComments, t0.objDetDate, t0.objDetMethod, t0.objDetResult, t0.objAddFloat1, t0.objAddFloat2, t0.objAddFloat3, t0.objAddFloat4, t0.objAddFloat5, t0.objEventAbundance, t0.objEventCollectionMethod, t0.objEventComments, t0.objEventMoreContacts, t0.objEventDateDay1, t0.objEventDate1, t0.objEventDateMonth1, t0.objEventDate2, t0.objEventDateUncertain, t0.objEventDateYear1, t0.objEventEcosystem, t0.objEventHabitat, t0.objEventNumber, t0.objEventPermission, t0.objEventSubstratum, t0.objEventTime1, t0.objEventTime2, t0.objEventWeekNumber, t0.objFlora, t0.objGuidObject, t0.objIOComments, t0.objIODeAccessed, t0.objAddInt1, t0.objAddInt2, t0.objAddInt3, t0.objAddInt4, t0.objAddInt5, t0.objStorageForeignNumber, t0.objStorageNumber, t0.objStorageNumberInCollection, t0.objStorageNumberOld, t0.objStorageNumberPrefix, t0.objAddLkp1, t0.objAddLkp10, t0.objAddLkp2, t0.objAddLkp3, t0.objAddLkp4, t0.objAddLkp5, t0.objAddLkp6, t0.objAddLkp7, t0.objAddLkp8, t0.objAddLkp9, t0.objAddLkpCs1, t0.objAddLkpCs10, t0.objAddLkpCs11, t0.objAddLkpCs12, t0.objAddLkpCs13, t0.objAddLkpCs14, t0.objAddLkpCs15, t0.objAddLkpCs2, t0.objAddLkpCs3, t0.objAddLkpCs4, t0.objAddLkpCs5, t0.objAddLkpCs6, t0.objAddLkpCs7, t0.objAddLkpCs8, t0.objAddLkpCs9, t0.objOriginAccessionDate, t0.objOriginAccessionNumber, t0.objOriginComments, t0.objOriginMoreContacts, t0.objOriginSource, t0.objOriginType, t0.objPreparationComments, t0.objPreparationDate, t0.objPreparationType, t0.objPropAdults, t0.objPropAge, t0.objPropAgeUnit, t0.objPropEggs, t0.objPropFemale, t0.objPropHeight, t0.objPropHeightUnit, t0.objPropJuveniles, t0.objPropLarvae, t0.objPropLength, t0.objPropLengthUnit, t0.objPropMale, t0.objPropObservation, t0.objPropObservationComments, t0.objPropPupae, t0.objPropSex, t0.objPropStadium, t0.objPropWeight, t0.objPropWeightUnit, t0.objPropWidth, t0.objPropWidthUnit, t0.objSiteComments, t0.objStorageComments, t0.objStorageContainerNumber, t0.objStorageContainerPieces, t0.objStorageContainerType, t0.objStorageLevel1, t0.objStorageLevel2, t0.objStorageLevel3, t0.objStorageLevel4, t0.objStorageLevel5, t0.objStorageNumberInContainer, t0.objstoragePieces, t0.objStorageValue, t0.objStorageValueUnit, t0.objAddText1, t0.objAddText10, t0.objAddText2, t0.objAddText3, t0.objAddText4, t0.objAddText5, t0.objAddText6, t0.objAddText7, t0.objAddText8, t0.objAddText9, t0.objIdCollection, t0.objCommonIdReference, t0.objDetIdContact, t0.objDetIdReference, t0.objEventIdContact, t0.objIdExcursion, t0.objOriginIdContact, t0.objPreparationIdContact, t0.objIdProject, t0.objSiteIdSite, t0.objdetIdTaxon 
FROM tObjects t0 
WHERE t0.objdetIdTaxon IN (
    SELECT t1.taxIdTaxon.t1.taxIdTaxon 
    FROM tTaxa t1 
    WHERE (t1.taxTaxonDisplay LIKE 'Test Taxon 1' 
     OR t1.taxSynIdTaxon IN (
     SELECT t2.taxSynIdTaxon 
     FROM tTaxa t2 
     WHERE t2.taxTaxonDisplay LIKE 'Test Taxon 1')))

取出错误：

SELECT t1.taxIdTaxon.t1.taxIdTaxon

这是完整的废话。你不能在一个int类型上执行一个函数！

解决这个错误（BUG？）引入了一个新的结构（其中仍返回相同的结果）

SELECT t1.objIdObject, t1.objAdminCreated, t1.objAdminCreator, t1.objAdminEdited, t1.objAdminEditor, t1.objAdminImport1, t1.objAdminImport2, t1.objAddBool1, t1.objAddBool2, t1.objAddBool3, t1.objAddBool4, t1.objAddBool5, t1.objAddDateTime1, t1.objAddDateTime2, t1.objCommonComments, t1.objCommonDescription, t1.objCommonKeywords, t1.objCommonName, t1.objCommonPublished, t1.objCommonPublishedAs, t1.objCommonStatus, t1.objCommonType, t1.objCommonTypustype, t1.objDetAccuracy, t1.objDetCf, t1.objDetComments, t1.objDetDate, t1.objDetMethod, t1.objDetResult, t1.objAddFloat1, t1.objAddFloat2, t1.objAddFloat3, t1.objAddFloat4, t1.objAddFloat5, t1.objEventAbundance, t1.objEventCollectionMethod, t1.objEventComments, t1.objEventMoreContacts, t1.objEventDateDay1, t1.objEventDate1, t1.objEventDateMonth1, t1.objEventDate2, t1.objEventDateUncertain, t1.objEventDateYear1, t1.objEventEcosystem, t1.objEventHabitat, t1.objEventNumber, t1.objEventPermission, t1.objEventSubstratum, t1.objEventTime1, t1.objEventTime2, t1.objEventWeekNumber, t1.objFlora, t1.objGuidObject, t1.objIOComments, t1.objIODeAccessed, t1.objAddInt1, t1.objAddInt2, t1.objAddInt3, t1.objAddInt4, t1.objAddInt5, t1.objStorageForeignNumber, t1.objStorageNumber, t1.objStorageNumberInCollection, t1.objStorageNumberOld, t1.objStorageNumberPrefix, t1.objAddLkp1, t1.objAddLkp10, t1.objAddLkp2, t1.objAddLkp3, t1.objAddLkp4, t1.objAddLkp5, t1.objAddLkp6, t1.objAddLkp7, t1.objAddLkp8, t1.objAddLkp9, t1.objAddLkpCs1, t1.objAddLkpCs10, t1.objAddLkpCs11, t1.objAddLkpCs12, t1.objAddLkpCs13, t1.objAddLkpCs14, t1.objAddLkpCs15, t1.objAddLkpCs2, t1.objAddLkpCs3, t1.objAddLkpCs4, t1.objAddLkpCs5, t1.objAddLkpCs6, t1.objAddLkpCs7, t1.objAddLkpCs8, t1.objAddLkpCs9, t1.objOriginAccessionDate, t1.objOriginAccessionNumber, t1.objOriginComments, t1.objOriginMoreContacts, t1.objOriginSource, t1.objOriginType, t1.objPreparationComments, t1.objPreparationDate, t1.objPreparationType, t1.objPropAdults, t1.objPropAge, t1.objPropAgeUnit, t1.objPropEggs, t1.objPropFemale, t1.objPropHeight, t1.objPropHeightUnit, t1.objPropJuveniles, t1.objPropLarvae, t1.objPropLength, t1.objPropLengthUnit, t1.objPropMale, t1.objPropObservation, t1.objPropObservationComments, t1.objPropPupae, t1.objPropSex, t1.objPropStadium, t1.objPropWeight, t1.objPropWeightUnit, t1.objPropWidth, t1.objPropWidthUnit, t1.objSiteComments, t1.objStorageComments, t1.objStorageContainerNumber, t1.objStorageContainerPieces, t1.objStorageContainerType, t1.objStorageLevel1, t1.objStorageLevel2, t1.objStorageLevel3, t1.objStorageLevel4, t1.objStorageLevel5, t1.objStorageNumberInContainer, t1.objstoragePieces, t1.objStorageValue, t1.objStorageValueUnit, t1.objAddText1, t1.objAddText10, t1.objAddText2, t1.objAddText3, t1.objAddText4, t1.objAddText5, t1.objAddText6, t1.objAddText7, t1.objAddText8, t1.objAddText9, t1.objIdCollection, t1.objCommonIdReference, t1.objDetIdContact, t1.objDetIdReference, t1.objEventIdContact, t1.objIdExcursion, t1.objOriginIdContact, t1.objPreparationIdContact, t1.objIdProject, t1.objSiteIdSite, t1.objdetIdTaxon 
FROM tTaxa t0, tObjects t1 
WHERE (
    t0.taxIdTaxon IN (
     SELECT t2.taxIdTaxon 
     FROM tTaxa t2 
     WHERE (t2.taxTaxonDisplay LIKE 'Test Taxon 1' 
      OR t2.taxSynIdTaxon IN (
      SELECT t3.taxSynIdTaxon 
      FROM tTaxa t3 
      WHERE t3.taxTaxonDisplay LIKE 'Test Taxon 1' 
      ) 
     ) 
    ) AND (t0.taxIdTaxon = t1.objdetIdTaxon) 
)

这似乎很奇怪，我，但它的工作 - 这是比我的另类的查询速度更快，其中包括一个inner join

注意：Eclipselink不会忽略JoinType。无论你通过什么，它都需要left outer join。（文档说别的！）

最后我提供两个例子为join和joinless

private static Predicate addSynonymsWithJoins(Root<BioObjectImpl> r, CriteriaBuilder b, CriteriaQuery cq, 
     Attribute attr, Path path, Object value) { 
    Join taxJoin = r.join(BioObjectEnum.taxon.name(), JoinType.INNER); 

    Path<Object> taxValidSynonymId = taxJoin.get(TaxonEnum.validSynonymId.name()); 
    Subquery<TaxonImpl> innerSubquery = cq.subquery(TaxonImpl.class); 
    Root fromSubTax = innerSubquery.from(TaxonImpl.class); 
    innerSubquery.select(fromSubTax.<Integer> get(TaxonEnum.id.name())); 
    Predicate dynamic1 = cb.like(fromSubTax.get(TaxonEnum.name.name()), 
    NAME_LIKE); 
    innerSubquery.where(dynamic1); 
    Predicate dynamic2 = resolveComparator(b, attr, taxJoin.get(attr.getPropertyName()), attr.getValue());// 
    Predicate p = b.or(taxValidSynonymId.in(innerSubquery), dynamic2); 

    return p; 
} 

private static Predicate addSynonymsWithoutJoins(Root<BioObjectImpl> r, CriteriaBuilder b, CriteriaQuery cq, 
     Attribute attr, Path path, Object value) { 
    cq.select(r); 

    Path<Integer> objTaxonId = r.<Integer> get(BioObjectEnum.taxon.name()).get(TaxonEnum.id.name()); 

    Subquery<Integer> t2 = cq.subquery(Integer.class); 
    Root<TaxonImpl> t2fromTaxon = t2.from(TaxonImpl.class); 
    Path<Integer> t2taxId = t2fromTaxon.<Integer> get(TaxonEnum.validSynonymId.name()); 
    t2.select(t2taxId); 
    Predicate t2dynamicWhere = resolveComparator(b, attr, t2fromTaxon.get(attr.getPropertyName()), attr.getValue()); 
    t2.where(t2dynamicWhere); 

    Subquery<Integer> t1 = cq.subquery(Integer.class); 
    Root<TaxonImpl> t1fromTaxon = t1.from(TaxonImpl.class); 
    Predicate t1dynamicWhere = b.like(fromSubTax.get(TaxonEnum.name.name()), 
    NAME_LIKE); 
    Path<Integer> t1Select = t1fromTaxon.<Integer> get(TaxonEnum.id.name()); 

    t1.select(t1Select); 
    Path<Integer> t1TaxSynonymId = t1fromTaxon.<Integer> get(TaxonEnum.validSynonymId.name()); 
    t1dynamicWhere = b.or(t1dynamicWhere, t1TaxSynonymId.in(t2)); 
    t1.where(t1dynamicWhere); 

    Predicate where = objTaxonId.in(t1); 
    return where; 
}

来源

2017-05-11 07:49:22 lumo

的EclipseLink - 子查询与标准查询（JPA）

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