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5

Does ObjectDB support lazy loading?

.createEntityManager(); em.getTransaction().begin(); A a = new A(); a.list = new ... .createEntityManager();             if (args[0].equals("persist")) {          em.getTransaction().begin
5

JOD problems regarding detachCopy()

{ pm.currentTransaction().begin(); Query q=pm.newQuery(Boat.class ... .getPersistenceManager(); try { pm.currentTransaction().begin
5

Unable to persist TreeMap

.getTransaction().begin();         em.persist(p);         em.getTransaction().commit ... ()); } //for em.getTransaction().begin(); em.persist(association); em.persist(pc); em.getTransaction
5

ObjectDB Enincompatible with Quarkus?

: "__odbVersionCrc" in "Film" must not begin with "__", which is reserved by GraphQL introspection. ie ... .InvalidSchemaException: invalid schema: "__odbVersionCrc" in "Film" must not begin
5

PostUpdate collection null

= emf.createEntityManager();         em.getTransaction().begin();         MyEntity e = new MyEntity(1 ... .createEntityManager();         e = em.find(MyEntity.class, 1);         em.getTransaction().begin
5

failure to enforce NOT NULL for java.lang.String

); //try { tr.begin(); em.persist(r); tr.commit(); //} //catch ... .getTransaction().begin();         em.persist(new Request());         em.getTransaction().commit
5

find() cost unreasonable time!

.begin();   Nodes parent = new Nodes();   em.persist(parent);   queue.add(parent);   int iNum = 0 ... ();     trans.begin();    }   }   trans.commit();   System.out.printf("Total: %d, Level:%d %n", iNum
5

IN expression in a Criteria Query

();         em.getTransaction().begin();         em.persist(new MyEntity("a"));         em.persist(new ... "             );                 EntityManager em = emf.createEntityManager();         em.getTransaction().begin();         em.persist(new
1

[ObjectDB 2.4.1] Unexpected exception (Error 990) on getObjectById

{             Object oid = null;             pm.currentTransaction().begin();             for (int i = 0; i ... ();                 pm.currentTransaction().begin();             pm.newQuery("SELECT a FROM
1

Sometimes the ObjectDB throws an internal expeption if a persist() was executed

executed on a test machine without ObjectDB lizense. At the beginning of the test ... see the exception, because at the beginning of our application we add for all entity classes

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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