Named Parameters in Queries - the spec vs the Java EE 5 Tutorial

Hi,
I've been studying the topic about the named parameters in JPA and found one inconsistency between the spec and the Java EE 5 Tutorial. Could anyone lend me a helping hand understanding it?
The Java Persistence API spec (ejb-3_0-fr-spec-persistence.pdf) 3.6.3 "Named Parameters" at page 69 reads:
The use of named parameters applies to the Java Persistence query language, and is not defined for native queries.
whereas the Java EE 5 Tutorial in the section Named Parameters in Queries (http://java.sun.com/javaee/5/docs/tutorial/doc/PersistenceIntro3.html#wp81563) of The EntityManager reads:
Named parameters are case-sensitive, and may be used by both dynamic and static queries.
I think that the reality is that every JPA provider supports named parameters in dynamic and static queries, but it's not fully supported by the spec (yet not forbidden).
Jacek
Jacek Laskowski
http://www.jaceklaskowski.pl

Hi Jacek,
These are not conflicting statements. Named parameters apply to the Java Persistence
Query language only, not to native queries. There are two ways to specifiy
Java Persistence Query Language queries : dynamically and statically. You can
either pre-define the query string using @NamedQuery
static :
@NamedQuery(name="findPersonByName",
query="SELECT OBJECT(p) FROM Person p WHERE p.name LIKE :pName")
OR, pass the query string in at runtime using EntityManger.createQuery
dynamic :
em.createQuery("SELECT OBJECT(p) FROM Person p WHERE p.name LIKE :pName")
The dynamic approach allows you to construct portions of the query string at runtime.
My example doesn't do that but the point is that use of the createQuery()
API is considered the dynamic approach.
The crux of the Java EE 5 Tutorial statement you referenced is that named parameters apply to
both the static and dynamic use of Java Persistence Query Language queries.
--ken

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