Home » Search

About Object Database

131-140 of 200 Refresh
Issue
10

JPA Composite Key make Object Db throws "Unexpected exception (Error 990)"

Hello Object Db community :) I am using this wonderful library and I caught a strange exception ... are compliant with the object Db Documentation: http://www.objectdb.com/java/jpa/entity/id Unfortunately, while merging the entity, object db is throwing the following Exception : [ObjectDB 2.4.0
Forum
10

Object DB vs EclipseLink/TopLink: Unloaded relationships in detached entities

a FETCH JOIN as described here: Detach JPA objects with lazy initialized properties This has the big ... .eclipse.org/mhonarc/lists/eclipselink-users/msg05258.html: Detached Objects get the connection need ... loading association from the database, when it needs it (without any merge call). From doug clarke
Forum
10

Object explorer cannot open odb file. ObjectDB many-to-many relationship

.getAssignements().get(a11pk); assertEquals(p1, a11.getProject()); But: Question 1: After my test, the database ... get an Assignement object from User object and Underlying object (but not through theirs keys). I'd like to work with typed object in the code whenever possible, and make key usage as transparent as possible
Forum
10

Object belongs to another EntityManager - ERROR

a record in database [ObjectDB 2.4.6_13] javax.persistence.RollbackException 10:29:14,880 ERROR [stderr] (http--10.23.3.98-8081-5) Failed to commit transaction: Object 'pbdmodel.impl.OrgJedinicaImpl ... .UserException: Object 'pbdmodel.impl.OrgJedinicaImpl#8' belongs to another EntityManager 10:29:15,072
Forum
10

Attempt to refresh a non managed entity object (error 635)

.IllegalArgumentException Attempt to refresh a non managed entity object (error 635) Nothing changed in my code ... with Intellij's JPA database explorer, which required me to use a JPA persistence.xml configuration file ... entity object, i.e. a new entity object that has not been persisted yet, or a detached entity object (e
Forum
10

how to persist an object twice into two diff. collections of two diff. classes

ok my problem,    i persist a Squad Object into a Cup Object at the beginning, after i have to create and persist a competition object in which i have to put some of the already created/persisted ... .java:259) at ch.hsr.gymtastic.technicalServices. database.DBConnection.commit(DBConnection.java:46
Forum
10

Is it ok to put list or map of embeddable objects in entity ?

Hi, Is it ok to put list or map of embeddable objects in entity? I mean, for example : @Entity ... >()) on an entity that had some Class_B instances in bList? Will they be deleted correctly from database ... X not found". I found an option to put a classpath for persistence objects and metadata, where I
Issue
10

Database File Compression

ObjectDB database files are usually smaller than database files of other Database Management Systems ( object databases and relational databases) but additional internal compression is still possible ... . So the effect of using compressed ObjectDB database file on performance is unknown yet.
Forum
10

Performance with large databases

a larger database. Is fetching an object by the id faster than fetching by an indexed field, or ... When populating a large database (10s of GBs) performance drops suddenly at a certain time whenever I run the populating application.  Is there typically a database size when indexes can no longer
Forum
10

Using the wrong class to access a database

the Point database described in the Getting Started section: package com.objectdb.tutorial ... if I can access the database from here. This program is almost the same as the first; it only calls ... are working fine, but the third ruins the database: - The number of entries is zero. - running the app