How to implement partial JPA entity loading?

Question

Java

There is a JPA entity. It contains many classes that are also separate tables. The parent entity is associated with the child FetchType.EAGER. I would not want to touch the domain model, since it is used in a bunch of code and I don’t want to change it, and then something will fall off. That is, the parent entity itself is quite heavy. But the task arose of selecting only a few fields from the parent entity and some fields from the child communities (and not all of them). You can select an SQL query bypassing JPA, but then you need to implement pagination, but I would not want to lose it. If at all such a possibility?

Answer 1

I'm still learning Hibernate, but what if it's done using projections?
https://www.baeldung.com/spring-data-jpa-projections

However, more often than not, we don't need all the properties of the returned objects