spring jpa create double parenthesis query

问题

I'm using Spring Boot with JPA (EclipseLink) and Oracle 11. I have CrudRepository interface:

public interface TransportDefRepository extends CrudRepository<TransportDef, Long> {
    public List<TransportDef> findByNameInOrderByNameAsc(List<String> names);
}

Calling findByNameInOrderByNameAsc method creates query:

SELECT ID, NAME,
FROM TRANSPORT_DEFS WHERE (NAME IN (('A','B'))) ORDER BY NAME ASC

and Oracle throws exception:

ORA-00907: missing right parenthesis

Am I doing something wrong? Why there are double parenthesis in generated query?

回答1:

My solution:

@Query("select t from TransportDef t where t.name in ?1 order by t.name asc")
public List<TransportDef> findByNameInOrderByNameAsc(List<String> names);

With @Query annotation eclipselink creates query:

SELECT ... FROM TRANSPORT_DEFS WHERE (NAME IN (?,?,?)) ORDER BY NAME ASC

It's only workaround - I have no idea why Spring Data JPA generates invalid query without this annotation...

回答2:

I am not so sure about that specially the need for you to pass a list in to be queried from your table but if I were you I would code it differently.

1.Instead of passing a list as an argument I would pass parameters. and do the List names iteration on the service layer and still return list from your repo. so my code on my repo would be like below

@Query("SELECT t FROM TRANSPORT_DEFS t WHERE t.name = :name)
List<TransportDef> findByNameInOrderByNameAsc(@Param("name") String name);

This would work you just need to tweak your logic on your service.

来源：https://stackoverflow.com/questions/36921151/spring-jpa-create-double-parenthesis-query