的EclipseLink/TopLink的全外連接，而不是左加入

在模卡可以有或沒有持卡人（1：1），我想獲得由發行人掛actived持卡人加上卡無持卡人每卡過濾器，所以我需要一個完整的外連接。雖然下面的查詢轉換爲左連接返回剛剛與持卡人的卡的EclipseLink/TopLink的全外連接，而不是左加入

final ExpressionBuilder builder = new ExpressionBuilder(Card.class); 

    Expression queryExp = builder.get("cardIssuer").equal(cardIssuer); 
    queryExp = queryExp.and(builder.get("cardStatus").get("statusType").equal("ACTIVATED")); 
    queryExp = queryExp.and(builder.getAllowingNull("cardHolder")isNull().or(
        builder.get("cardHolder").get("status").get("status").equal("ACTIVE"))); 


    Expression orderExpression = builder.get("cardHolder").get("surname").descending(); 


    return getMultiple(queryExp, pageable , Card.class, orderExpression);

翻譯查詢

SELECT COUNT(t0.CARD_ID) FROM CARD t0 LEFT JOIN CARD_HOLDER t3 
ON (t3.CARD_HOLDER_ID = t0.CARD_HOLDER_ID), CARD_HOLDER_STATUS t2, CARD_STATUS t1 
WHERE (((((t0.CARD_ISSUER_ID = 10006) AND (t1.STATUS_TYPE = 'ACTIVATED')) AND (t2.STATUS = 'ACTIVE')) 
AND (t0.CARD_ID IN ('52683','52692'))) 
AND ((t1.CARD_STATUS_ID = t0.CARD_STATUS_ID) AND (t2.STATUS_ID = t3.STATUS_ID)))

來源

2016-11-11 Rafael Ruiz Tabares

，什麼是「的ExpressionBuilder」？如果它是一些EclipseLink API類，那麼請刪除JPA標記 –

你是對的標籤 –

請參閱https://www.eclipse.org/eclipselink/documentation/2.5/concepts/expressions002.htm#CJAJIHBJ – Chris

由於JPA版本外連接做得不好，所以我發現通過本機查詢方式

@NamedNativeQueries({ 
@NamedNativeQuery(name = Card.USER_DIRECTORY_BASE, 
    query = "select * from card c full outer join card_holder ch on c.card_holder_id = ch.card_holder_id " 
     + "where c.CARD_ISSUER_ID = ?1 and c.card_status_id = 1 and (ch.STATUS_ID = 1 or c.CARD_HOLDER_ID is null) " 
     + "order by ch.FORENAME asc", 
    resultClass = Card.class), 

@NamedNativeQuery(name = Card.USER_DIRECTORY_BASE_COUNT, 
    query = "select count(*) from card c full outer join card_holder ch on c.card_holder_id = ch.card_holder_id " 
     + "where c.CARD_ISSUER_ID = ?1 and c.card_status_id = 1 and (ch.STATUS_ID = 1 or c.CARD_HOLDER_ID is null) " 
     + "order by ch.FORENAME asc")

}）

並獲得結果

Query query = em.createNamedQuery(Card.USER_DIRECTORY_BASE); 
query.setParamenter(1,10000); 
query.getResultList();

來源

2016-11-16 09:58:45

的EclipseLink/TopLink的全外連接，而不是左加入

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