@NamedNativeQuery(
    name = "MyEntity.storedProc",
    query = "call ENTITY_PKG.StoredProc(:inputOne, :inputTwo, :resultSet)",
    callable = true,
    readOnly = true,
    resultClass = MyEntity.class
)

@NamedStoredProcedureQuery(
        name = "MyEntity.storedProc",
        procedureName = "ENTITY_PKG.StoredProc",
        resultClasses = MyEntity.class,
        parameters = {
            @StoredProcedureParameter(name = "I_INPUT_ONE", type = String.class, mode = ParameterMode.IN),
            @StoredProcedureParameter(name = "I_INPUT_TWO", type = Character.class, mode = ParameterMode.IN),
            @StoredProcedureParameter(name = "O_CURSOR", type = void.class, mode = ParameterMode.REF_CURSOR)
        }
)

Caused by: java.lang.UnsupportedOperationException: org.hibernate.dialect.Oracle10gDialect does not support resultsets via stored procedures
    at org.hibernate.dialect.Dialect.registerResultSetOutParameter(Dialect.java:1612)
    at org.hibernate.engine.jdbc.cursor.internal.StandardRefCursorSupport.registerRefCursorParameter(StandardRefCursorSupport.java:94)
    at org.hibernate.procedure.internal.AbstractParameterRegistrationImpl.prepare(AbstractParameterRegistrationImpl.java:298)
    at org.hibernate.procedure.internal.ProcedureCallImpl.buildOutputs(ProcedureCallImpl.java:417)
    at org.hibernate.procedure.internal.ProcedureCallImpl.getOutputs(ProcedureCallImpl.java:378)
    at org.hibernate.jpa.internal.StoredProcedureQueryImpl.outputs(StoredProcedureQueryImpl.java:251)
    at org.hibernate.jpa.internal.StoredProcedureQueryImpl.execute(StoredProcedureQueryImpl.java:234)
    at com.example.MyEntityDao.testStoredProc(MyEntityDao.java:88)

StoredProcedureQuery query = entityManager
        .createNamedStoredProcedureQuery("MyEntity.storedProc");

query.setParameter("I_INPUT_ONE", "inputOneValue");
query.setParameter("I_INPUT_TWO", 'x');
query.execute(); // exception is triggered by query.execute()

MyEntity myEntity = (MyEntity) query.getOutputParameterValue("O_CURSOR");

<property name="hibernate.dialect" value="org.hibernate.dialect.Oracle10gDialect" />

CREATE OR REPLACE PACKAGE ENTITY_PKG IS
TYPE EntityCursor IS REF CURSOR;

PROCEDURE StoredProc
(
   I_INPUT_ONE IN ENTITIES.INPUT_ONE%TYPE, -- VARCHAR2
   I_INPUT_TWO IN ENTITIES.INPUT_TWO%TYPE, -- CHAR
   O_CURSOR OUT EntityCursor
);

END ENTITY_PKG;

sp.registerStoredProcedureParameter("an_stud_new_id", String.class, ParameterMode.IN);
        sp.registerStoredProcedureParameter("an_stud_merge_id", String.class, ParameterMode.IN);