的EclipseLink - 子查詢與標準查詢（JPA）

採取如給出的以下兩個表：的EclipseLink - 子查詢與標準查詢（JPA）

Objects與objId列，objTaxonId
Taxa與taxValidSynonymId列taxId，taxName（注類羣是多個用於分類羣）

如果Taxon有效，它的id和validSynonymId是相同的，否則它們是不同的。要找到你「只」需要找到所有類羣，其中taxValidSynonymId充滿了有效的分類羣

我怎樣才能得到大家Objects的taxId一分類單元的所有同義詞，其中Taxon有一個給定的名稱（包括它們的同義詞？）在SQL這幾行（和分鐘完成）

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' 
    ) 
)

我能夠制定出內側部分，在那裏我獲得類羣及其同義詞的列表。現在我需要這個Query變換爲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：類羣在我的實際應用程序的代碼（映射爲一個多對一的關係（目標實體TaxonImpl）

來自子查詢）將是動態的，所以Native Query不會幫助我。

來源

2017-05-08 lumo

我想出如何「改造」的subquery成query但Eclipselink把我的兩個錯誤

第一個被禁止通過現場訪問，當我試圖對TaxonImpl結果中（我想，第一，在我的映射文件的Taxon被映射爲Entity

在此之後，所以我試圖形成SQL 1：1至JPA 但Eclipselink產生奇怪的事情：

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')))

取出錯誤：

SELECT t1.taxIdTaxon.t1.taxIdTaxon

這是完整的廢話。你不能在一個int類型上執行一個函數！

解決這個錯誤（BUG？）引入了一個新的結構（其中仍返回相同的結果）

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) 
)

這似乎很奇怪，我，但它的工作 - 這是比我的另類的查詢速度更快，其中包括一個inner join

注意：Eclipselink不會忽略JoinType。無論你通過什麼，它都需要left outer join。（文檔說別的！）

最後我提供兩個例子爲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; 
}

來源

2017-05-11 07:49:22 lumo

的EclipseLink - 子查詢與標準查詢（JPA）

回答

相關問題