About removal

forum_thread

Lazy loading does not work - crud takes long

tomee7.0.0SNAPSHOT,objectdb 2.6.4 The OneToMany Entities are filled with 40.000 Records and they have between 20-40 Columns. It takes over 50s to load all Project Enities that contains the OneToMany Relationships. It should be load lazy but i didnt know why the query fetch all the Data. #1 2015-10-24 23:07 tomee7.0.0SNAPSHOT,objectdb 2.6.4 The OneToMany Entities are filled with 40.000 Records and they have bet ...

 
forum_thread

Schema Update: class hierarchy change

Hello, we try to change the class hierarchy of an Entity. You wrote www.objectdb.com/database/forum/899 that ObjectDB support automatic schema evolution for adding and removing fields and for class hierarchy change.   But our small test failed: At first create a DataBase with one Object of MyEntity #1 2015-07-15 08:26 Hello, we try to change the class hierarchy of an Entity. You wrote www.objectdb.com/database/for ...

 
forum_thread

Some details about db behavior

Suppose I have two entities... A B -> A B has a ManyToOne relationship with A. When my database is empty and I persist a valid B entity (that contains actual A reference) I observe some behaviour that I'm not sure I understand. #1 2014-06-26 15:16 Suppose I have two entities... A B -> A B has a ManyToOne relationship with A. ...

 
forum_thread

Database(*.odb) file size on disk

Hello, we have questions about the file size of ObjectDB database on disk. Can you tell us something about how the deleting of entities affects the size of *.odb files on disk? -Will the released memory always used by new entities? -Will be the database file automatically reduced?   We have created a small test, in which we create and delete entities. It looks like that the released memory are reused but the the file not resized. The database is at the end empty again, but larger than the initial size. #1 2016-07-15 10:06 Hello, we have questions about the file size of ObjectDB database on disk. Can you tell us something ...

 
forum_thread

'DROP TABLE' in ODB?

Let's say I no longer need some entity in my project and after deleting all the objects of this type in database I want to remove this type from schema. How can I do this? Is there something like SQL 'drop table' in ODB? #1 2012-03-14 07:39 Let's say I no longer need some entity in my project and after deleting all the objects of this type in datab ...

 
page

Posting to ObjectDB Website - Important Instructions

Instructions for posting to ObjectDB website (to the forum, the issue tracking and the help desk). Please read the following instructions carefully - before posting to the ObjectDB website. 1. Where to Post Almost everything should be posted to the ObjectDB Forum  - and not as an help desk support ticket or as a ...

 
manual

[ODB1] Chapter 6 - Persistent Objects

Shows how to store, retrieve, update and delete database objects. This chapter describes how to use ObjectDB to manage database objects. It includes the following section: 6.1  Making Objects Persistent 6.2  Object IDs and Names 6.3  Retrieving Persistent Objects 6.4  M ...

 
issue

New Java 8 (JDK 1.8) Collection Methods

ObjectDB version 2.5.5 (and above) supports Java 8 (JDK 1.8). Tracking changes to collections and maps using some new Java 8 methods is currently not fully supported. The main known issue is that orphan removal does not happen as a result of removing a reference to an object (which becomes an orphan) using the new methods: removeIf(predicate) and remove(key, value). ... supported. The main known issue is that orphan removal does not happen as a result of removing a reference to an object (which ...

 
api-jdo

javax.jdo.spi.JDOImplHelper

This class is a helper class for JDO implementations.(Class of JDO)

 
api-jdo

removeFetchGroups(groups)

Remove the FetchGroups from the set of active FetchGroups.(Method of javax.jdo.PersistenceManagerFactory)