Re: JPA Calling an Oracle function with OUT parameter

If you can rewrite the pl/sql side as a function that might get you out of hell.

from
--pl/sql
create procedure my_function( arg1 in out varchar2 , arg2 varchar2)
to
create function my_function(arg2 varchar2) return varchar2

at that point you should be able to
select my_function('arg1') from dual
Owen Jacobson wrote:
On Jun 12, 9:29 am, Stanimir Stamenkov <s7a...@xxxxxxxxxxxx> wrote:
[Followup-To: comp.lang.java.databases]

I'm relatively new to JPA (Java Persistence API). I'm given an
Oracle function I need to execute through an EntityManager. The
function has an OUT parameter (the first one) declared in addition
to returning a value. I'm trying the following code:

EntityManager em;
...
Query query = em.createNativeQuery("{ ? = "
+ "call MY_FUNCTION(?,?,?,?,?,?,?) }");

query.setParameter(1, null); // XXX: registerOutParameter ?
query.setParameter(2, ...);
...
query.setParameter(7, ...);

List result = query.getResultList();

I don't know how I can register (and later get) the first parameter
as OUT parameter, pretty much like one could do with JDBC
(java.sql.CallableStatement), and I'm getting an exception as:

java.sql.SQLException: Missing IN or OUT parameter at index:: 9
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:111)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:145)
at oracle.jdbc.driver.OraclePreparedStatement.processCompletedBindRow(OraclePr eparedStatement.java:1680)
at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedSt atement.java:3279)
at oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePreparedState ment.java:3328)
at org.jboss.resource.adapter.jdbc.WrappedPreparedStatement.executeQuery(Wrapp edPreparedStatement.java:236)
at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:186)
at org.hibernate.loader.Loader.getResultSet(Loader.java:1787)
at org.hibernate.loader.Loader.doQuery(Loader.java:674)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.j ava:236)
at org.hibernate.loader.Loader.doList(Loader.java:2220)

How could I workout the given case?

FWIW, I'm working with JBoss 4.2.2.GA and Seam 2.0.2.SP1.

If there's any support for it at all, it'll be a JPA-vendor-specific
feature. The JPA provider for JBoss 4 is Hibernate; as far as I'm
aware, there's no general purpose support for stored procedure calls,
only some special-case support for a few specific forms. Check the
hibernate docs for details:
<http://www.hibernate.org/hib_docs/reference/en/html/
querysql.html#sp_query>

16.2.2.1 has some specific notes for Oracle sprocs.

-o
.