java - JPA / Get list of entities as references -

the entitymanager provides method getreference().

is there similar in jpql or event better within criteriabuilder, return list of entities references?

actual use id , process each entity in new transaction. want avoid entities, because mess memory usage.

if use references, type safe , memory overhead okay.

thanks!

you like

select idfield yourentity .. 

and in criteria query, use yourentity.idfield_ value.