Spring Data JPA NamedStoredProcedureQuery Multiple Out Parameters

Question

I have a simple stored procedure I\'m using to test out Spring Data JPA Stored Procedure feature.

create or replace procedure plus1inout (arg in int,res1 out int         


        

Answer 1

Spring Data JPA support multiple output parameters. Return type of Method must be a Map. I spent a lot of time on this. Below link exactly gives example of that, Search for User.plus1IO2.

User.java

UserRepository.java

Answer 2

Spring doesn't support multiple out params just yet. There is a JIRA for this.

Answer 3

It looks like @Procedure expects only one OUT parameter which is binded directly to the method return type...

To handle multiple OUT params you can use the JPA API directly:

StoredProcedureQuery proc = em.createNamedStoredProcedureQuery("plus1");

proc.setParameter("arg", 1);
proc.execute();
Integer res1 = (Integer) proc.getOutputParameterValue("res1");
Integer res2 = (Integer) proc.getOutputParameterValue("res2");
...

Answer 4

You can specify to return one of the multiple out params with the outputParameterName param in the @Procedure annotation like this:

@Repository
public interface AdjudConverDateSPRepository extends JpaRepository<AdjudConverDateSP, Long> {
    @Procedure(name = "plus1", outputParameterName = "res2")
    Integer plus1(@Param("arg") Integer arg);
}

UPDATE 2019-06-24:

Multiple out parameters is now supported in Spring Data JPA 2.2-RC1 https://spring.io/blog/2019/06/17/spring-data-moore-rc1-and-lovelace-sr9-released

https://jira.spring.io/browse/DATAJPA-707

The interface method just needs to have a Map return type so each out param can be accessed by key name:

@Repository
public interface AdjudConverDateSPRepository extends JpaRepository<AdjudConverDateSP, Long> {
    @Procedure(name = "plus1")
    Map<String, Object> plus1(@Param("arg") Integer arg);
}