如何在Spring数据存储库中编写SELECT TOP 25 sql查询

Question

SELECT TOP 25 * FROM ARCUST_BIG  WHERE arcustno<='300000' ORDER BY arcustno DESC

Arcust findByPrimaryKey(String id);

@Query("SELECT COUNT(a) FROM Arcust a")
Long countAll();

@Query("SELECT TOP 25 a FROM Arcust a WHERE a.arcustno<='?1' ORDER BY a.arcustno DESC")
List<Arcust> findByTop(String arcustno);
}

但是，findBytop查询似乎不起作用，当我用tomcat7启动服务时，返回如下内容：

2013-08-15 08:15:20 ERROR ContextLoader:319 - Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'arcustService': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.waudware.pics.repository.ArcustRepository com.waudware.pics.service.ArcustService.arcustRepository; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'arcustRepository': FactoryBean threw exception on object creation; nested exception is java.lang.IllegalArgumentException: Validation failed for query for method public abstract java.util.List com.waudware.pics.repository.ArcustRepository.findByTop(java.lang.String)!
Caused by: java.lang.IllegalArgumentException: Validation failed for query for method public abstract java.util.List com.waudware.pics.repository.ArcustRepository.findByTop(java.lang.String)!
Caused by: java.lang.IllegalArgumentException: org.hibernate.hql.internal.ast.QuerySyntaxException: unexpected token: 25 near line 1, column 12 [SELECT TOP 25 a FROM com.waudware.pics.domain.Arcust a WHERE a.arcustno<='?1' ORDER BY a.arcustno DESC]

Answer 1

#纯SQL

使用“极限”

SELECT * FROM ARCUST_BIG 
WHERE arcustno<='300000' ORDER BY arcustno DESC Limit 0, 25

注意：JPA支持通过使用方法createNativeQuery（）或通过使用注释@namedNativeQuery来创建本机查询JPA本机查询select和cast object object

List<Arcust> findTop25ByArcustnoLessThanOrderByArcustnoDesc(String arcustno);