"join fetch" on mapped-by association is ignored when using bytecode enhancement
Description
With bytecode enhancement enabled, with a Person entity that has a lazy one-to-one association to a Vehicle entity, when running this query:
"select p from Person p left join fetch p.vehicle"
If Vehicle is the owner of the association, the resulting Person instances won't have their vehicle property initialized.
Calling the getter will initialize the association, so the problem is only visible if you have a look at the number of SQL statements, or if you call the getter after the session was closed (then lazy-loading fails).
This looks like a regression from ORM, 5.4 where this used to work correctly. I'll submit a PR with a reproducer and hopefully a fix soon.
With bytecode enhancement enabled, with a
Personentity that has a lazy one-to-one association to aVehicleentity, when running this query:"select p from Person p left join fetch p.vehicle"If
Vehicleis the owner of the association, the resultingPersoninstances won't have theirvehicleproperty initialized.Calling the getter will initialize the association, so the problem is only visible if you have a look at the number of SQL statements, or if you call the getter after the session was closed (then lazy-loading fails).
This looks like a regression from ORM, 5.4 where this used to work correctly. I'll submit a PR with a reproducer and hopefully a fix soon.
Reported on Quarkus: https://github.com/quarkusio/quarkus/issues/17710