How to write dynamic native SQL Query in spring data JPA?

问题

I need to write a search query on multiple tables in database in spring boot web application.

It uses spring data jpa. I know we can write native query in spring data jpa using @Query annotation and native = true flag.

Is there any way I can write query in repository class and instead of the @Query annotation as the Query is very complex and dynamic.

回答1:

You need to do a CustomRepository and add a method with native query.

I do that this way:

Create your custom repository:

public interface OcorrenciaRepositoryCustom {
   List<Object[]> getStrings(List<String> valores);
}

Implement your custom repository: (The name of the implemantation must be the name of original repository add Impl as suffix.)

public class OcorrenciaRepositoryImpl implements OcorrenciaRepositoryCustom {
    @PersistenceContext
    private EntityManager entityManager;

    @Override
    public List<Object[]> getStrings(List<String> strings) {
        StringBuilder sb = new StringBuilder();
        sb.append("SELECT count(o.id) FROM soebm.ocorrencia o WHERE 1=1 ");

        if(strings.get(0)!=null && StringUtils.isNotEmpty(strings.get(0))) {
            sb.append(" AND to_char(o.date, 'YYYY-MM-DD') >= :dataInicio ");
        }

        Query query = entityManager.createNativeQuery(sb.toString());

        if(strings.get(0)!=null && StringUtils.isNotEmpty(strings.get(0).toString())) {
            query.setParameter("dataInicio", strings.get(0));
        }
        return query.getResultList();
    }
}

Extend your custom repository from main repository:

public interface OcorrenciaRepository extends JpaRepository<Ocorrencia, Long>, OcorrenciaRepositoryCustom {
    Ocorrencia findByPosto(Posto posto);
}

Now, in the service, you can call your new method from the main repository.

@Autowired
private OcorrenciaRepository repository;

public List<Object[]> findOcorrenciaCustom(String str) {
    List<String> strings = new ArrayList<String>() {{add(dataInicio);}};
    return repository.getStrings(strings);
}

It is important that the custom repository is under the package searched by JpaRepositories

@EnableJpaRepositories("com.test.my.repository")

I used Spring-Data-Jpa 1.9 in this example. It worked perfectly in my project.

来源：https://stackoverflow.com/questions/41376975/how-to-write-dynamic-native-sql-query-in-spring-data-jpa

标签

hibernate

spring-data-jpa