JOOQ: How to resolve foreign keys as objects?

Say I have a table that references another table, in this case “TestScenarios” references “TestSchemas”. So each TestScenario HAS-A TestSchema. I autogenerated DAOs, however, when fetching …

How to remove child objects from a @ManyToMany relation with lots of children in JPA and Hibernate

Let’s say I have two entities: Organization and User. Every user can be a member of many organizations and every organization can have many users. @Entity public class User { @ManyToMany Set&…

Android Room Persistence Library : What is the best way to implement a many to many relation?

I used to use Realm and I am currently testing Room in order to compare both tools. I am trying to implement the following many to many relation : Here my Entity classes : The Person : @Entity(…

What is the solution for the N+1 issue in JPA and Hibernate?

I understand that the N+1 problem is where one query is executed to fetch N records and N queries to fetch some relational records. But how can it be avoided in Hibernate?

How to map a map JSON column to Java Object with JPA

We have a big table with a lot of columns. After we moved to MySQL Cluster, the table cannot be created because of: ERROR 1118 (42000): Row size too large. The maximum row size for the used table …

What’s the difference between JPA and Spring Data JPA?

I am a bit confused about the difference between Spring Data-JPA and JPA. I know about JPA that it is a specification for persisting the Java Objects to a relational database using popular ORM …

hibernate or oracle support for timelines?

We have a requirement for persisting, using Hibernate, versioned Java objects into an Oracle database such that each version has a valid-from and valid-until timestamp. This is so we can query for …