What is the equivalent of '||' (concat) in Entitymanager java query?

Question

I would like to rewrite an oracle stored procedure to java code, to select data with concatenated values in a query string to compare the following way:

 Query qString = 
                        "SELECT Obj " +
                        "FROM MyTable Obj2 WHERE ( Obj2.value1 || Obj2.value2 ) in " +
                        "(SELECT Obj2.value1 || MAX(Obj2.value2) FROM MyTable Obj2 WHERE Obj2.value2 >= :param GROUP BY Obj2.value1) " +
                        "ORDER BY Obj.value2, Obj.value1";

                        query = entityManager.createQuery(qString);
                        query.setParameter("param ", param );

When I run the query as a webservice on weblogic server I got error with the '|' character. What can I use instead of the || operator to get the same result?

Answer 1

The Java Persistence Query Language provides the CONCAT() function, so you should be able to write Obj2.value1 || Obj2.value2 as CONCAT(Obj2.value1, Obj2.value2)