Question

Having two tables

A
 - id
 - name
 - bId

B
 - id
 - name

In the entity classes, because A is sent over a Webservice (in large amounts), I don’t want to have B as a member of A. So the A-class does only have a member like that:

@Column(nullable=false)
private long bId;

Considering that, how can I retrieve a list with all A’s referring to a B with name = X most effectively in JPQL?

Answer 1

select a from A a, B b
where a.bId = b.id
and b.name = :name

Note that A could have a toOne relationship to B marked as lazy, and configured (with transient?) so that it’s not serialized by your Java to XML process.