One addition (my question is still open). I can confirm that a valid workaround for this problem is to use setHint("openjpa.hint.UseLiteralInSQL", "true") and updating to OpenJPA 2.4.0 which is available in Maven central since a few days.
Henno -----Oorspronkelijk bericht----- Van: Henno Vermeulen [mailto:he...@huizemolenaar.nl] Verzonden: donderdag 23 april 2015 11:49 Aan: users@openjpa.apache.org Onderwerp: criteria API generates a parameter for literal in group by but does not provide the value Hello, I have a query created using the criteria API where I group by an expression that contains a small calculation using literal values. OpenJPA generates the correct SQL but does not provide the value of the generated parameter in the group by clause. The query fails with a SQL exception "The value is not set for the parameter number 9.". I can reproduce the issue with a minimal example. Suppose we have a person class with integer age and length columns and we wish to select the average length grouped by the person's age / 10: CriteriaBuilder cb = em.getCriteriaBuilder(); CriteriaQuery<Double> query = cb.createQuery(Double.class); Root<Person> person = query.from(Person.class); Expression<Double> averageLength = cb.avg(person.<Integer> get("length")); CriteriaQuery<Double> select = query.select(averageLength); select.groupBy(cb.quot(person.<Integer> get("age"), cb.literal(10))); // optional where, useful to ensure parameters are logged select.where(cb.gt(person.<Integer> get("age"), cb.literal(20))); System.out.println("result: " + em.createQuery(query).getResultList()); Whe running this query with trace and displaying parameters on I get: 1067 testPU TRACE [main] openjpa.Query - Executing query: Query: org.apache.openjpa.kernel.QueryImpl@be4f81; candidate class: class entities.Person; query: null 1108 testPU TRACE [main] openjpa.jdbc.SQL - <t 5763249, conn 7326702> executing prepstmnt 26531336 SELECT AVG(t0.length) FROM Person t0 WHERE (t0.age > ?) GROUP BY (t0.age / ?) [params=(int) 20] You can clearly see that the query has two parameter placeholders but only one value is provided. Shall I report this as a bug or am I doing something wrong in my code? (As a workaround I can call setHint("openjpa.hint.UseLiteralInSQL", "true") on em.createQuery(query). This doesn't work in my application because there is a bug where boolean literals aren't correctly handled: https://issues.apache.org/jira/browse/OPENJPA-2534. I think this is solved in the upcoming release.) Thank you, Henno