How to properly call PostgreSQL functions (stored procedures) within Spring/Hibernate/JPA?

Question

I\'m using Spring MVC 4, Hibernate and PostgreSQL 9.3 and have defined function (stored procedure) inside Postgres like this:

CREATE OR REPLACE FUNCTION spa.         


        

Answer 1

I think it's the RETURN VOID that's causing the issue. So, changed the FUNCTION definition like this:

CREATE OR REPLACE FUNCTION spa.create_tenant(t_name character varying)
  RETURNS bigint AS
  $BODY$
    BEGIN
      EXECUTE format('CREATE SCHEMA IF NOT EXISTS %I AUTHORIZATION postgres', t_name);
      RETURN 1;
    END
  $BODY$
  LANGUAGE plpgsql VOLATILE
  COST 100;
ALTER FUNCTION spa.create_tenant(character varying)
OWNER TO postgres;

After you changed your function to return some dummy value, change the stored procedure query to this:

StoredProcedureQuery query = entityManager
    .createStoredProcedureQuery("spa.create_tenant")
    .registerStoredProcedureParameter(1, 
        Long.class, ParameterMode.OUT)
    .registerStoredProcedureParameter(2, 
        String.class, ParameterMode.IN)
    .setParameter(2, name);
 
query.getResultList();