JPA + Hibernate +命名查询+如何加入子查询结果

任何人都可以帮助我将以下本地查询转换为命名查询？JPA + Hibernate +命名查询+如何加入子查询结果

原生查询：

 
SELECT 
     usr1.user_id, urr1.role_id, usr2.user_id, urr2.role_id, usr1.school_id, 
     term.term_name, count(material.material_id) as "Total Book Count", 
     fpc.FOLLETT_PENDING_COUNT as "Follett Pending Count", 
     rrc.RESOLUTION_REQUIRED_COUNT as "Resolution Required Count" 
FROM va_school sch 

JOIN va_user_school_rel usr1 on sch.school_id=usr1.school_id 
JOIN va_user_role_rel urr1 on usr1.user_id=urr1.user_id and urr1.role_id=1001 
JOIN va_user_school_rel usr2 on sch.school_id=usr2.school_id 
JOIN va_user_role_rel urr2 on usr2.user_id=urr2.user_id and urr2.role_id=1002 
JOIN va_term term on term.school_id = usr1.school_id 
JOIN va_class course on course.term_id = term.term_id 
JOIN va_material material on material.class_id = course.class_id 

LEFT JOIN 
     (SELECT VA_CLASS.TERM_ID as "TERM_ID", COUNT(*) as "FOLLETT_PENDING_COUNT" 
     FROM VA_CLASS JOIN VA_MATERIAL ON VA_MATERIAL.CLASS_ID = VA_CLASS.CLASS_ID 
     WHERE VA_CLASS.reference_flag = 'A' AND trunc(VA_MATERIAL.FOLLETT_STATUS) = 0 
     GROUP BY VA_CLASS.TERM_ID) fpc on term.term_id = fpc.term_id 

LEFT JOIN 
     (SELECT VA_CLASS.TERM_ID as "TERM_ID", COUNT(*) as "RESOLUTION_REQUIRED_COUNT" 
     FROM VA_CLASS JOIN VA_MATERIAL ON VA_MATERIAL.CLASS_ID = VA_CLASS.CLASS_ID 
     WHERE VA_CLASS.reference_flag = 'A' AND trunc(VA_MATERIAL.FOLLETT_STATUS) = 1 
     GROUP BY VA_CLASS.TERM_ID) rrc on term.term_id = rrc.term_id 
WHERE course.reference_flag = 'A' 
GROUP BY usr1.user_id, urr1.role_id, usr2.user_id, urr2.role_id, usr1.school_id, term.term_name, fpc.FOLLETT_PENDING_COUNT, rrc.RESOLUTION_REQUIRED_COUNT 
ORDER BY usr1.school_id, term.term_name;

在此先感谢。

斯里里

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2010-03-04 Srihari

我建议这个移动存储过程和呼叫从JPA存储过程。

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2010-03-05 06:45:35 Padmarag

根据您的对象对象模型，你应该考虑你的查询的目的。查看你的SQL语句在语义上是一个问题，如果应该制定一个HQL查询。

尽管如此，在基于Hibernate的应用程序中创建theta风格的查询甚至可以作为命名查询是可能的 - 而且通常也是如此。

HQL查询大多数时间看起来像本地一样，它使用对象模型的关系。这些关系对方式有很大的影响，查询可能会被定义。而不是从School实体开始。他们可能从User数据集开始。

SELECT .... 
FROM User user1, User user2 
JOIN User.school as school 
... 
WHERE school = user2.school

这实在是更容易跟随to one关系，因此我通常重塑我的查询的方式，他们往往会执行我的方式。

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2010-03-05 07:05:52

JPA + Hibernate +命名查询+如何加入子查询结果

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