ObjectDB Database Search

/database/jdo/ manual /chapter2#Hello_World), i'm using neatbeans 8.1 to build it Exception in thread "main

In Mysql, one can divide records by select * from ttt limit x,length. Then how to do it in Objectdb? gzdillon Lai Yang This is explained in the manual . support Support

Evolution in the manual ).  alter table add index ... Add the index definition and rebuild the database

. See the manual for more information on  database urls and this configuration . support Support

the manual . But of course, ObjectDB should not throw a  NullPointerException in this case. I will try

path in the manual . Notice that the database file can be at any absolute path that you specify

.2.4 but undocumented yet (the manual will be updated soon for version 2.3). This has the advantage

, if necessary, edit the persistence.xml file manually , following the attached sample file

I was wondering if there is any way to get a list of the entity names in the database? dmoshal David Moshal You can use the Metamodel API as explained by the JPA Metamodel API  page in the manual . support Support Actually, there is a simpler way to get the class names (in one line of code

collection). The features above are described in the Explorer page in the new 2.3 manual . In addition

(on both the client side and the server side). It is explained on this manual page . support Support

;private List children; You may also specify cascading persist globally as explained in the manual . support Support

Hello, As in our OSGI Environment, we do need to manually weave classes. To be able to do so, we'd need access to the ClassTransformer from ObjectDB. However, there's only the global enhancer api which is not of any help. There's the JEhancerAgent which seems to implement a ClassTransformer as

.4_03). I had to load them manually in the transaction due to lack of time but would like

Is there LIMIT or TOP functions in object db? If so can you provide some examples? vinodh vinodhkumar You can set query result range by using the setFirstResult and setMaxResults methods. You can find more details and an example in the manual . support Support Thanks. This solved my purpose. vinodh vinodhkumar

; CriteriaQuery . There are some relevant examples in the manual .   support Support Ok yes I

the manual : In the [Parameters] table provide arguments for parameters (if any). An entity object

and filter the organisations manually . However if I do that, I cannot support pagination

this configuration file is probably not used (see rules for the configuration path on this manual page

is still there. If you try to manually delete the folder, you will get an "Folder in use" error message

The way resizing works is briefly described in the manual  and no other tuning options

Persisting objects is explained in this manual page . Related source code that can be made public

The online manual is always expected to be up to date with the last ObjectDB version.  First, I've

.  I have followed both suggestions - manually listing classes along with setting exclude-unlisted

the end of this manual page . support Support It works now! The problem was that I had have imported

chapter 3 of the manual . You may also register listener using the JDO API, which is not documented but supported by ObjectDB. support Support

Hello, How can I save data dynamically such as "List" in Java - ArrayList, LinkedList, etc. thanks Seena Abdollahi Seena Abdollahi Software Engineer sabdollahi Seena Abdollahi Lists are persisted automatically as fields of entity classes. See chapter 2 and 3 of the manual for more details. support Support

is described on this manual page . You can use it for a cluster of database servers, with one read

The ObjectDB manual ( https://www.objectdb.com/java/jpa/query/jpql/from ) gives an example of using JOIN FETCH to avoid excessive round trips to the database: SELECT c FROM Country c JOIN FETCH c.capital I've tried a few variants of the following example, and haven't been able to get this to work

the database file - it may be possible to fix it manually . support Support

maven goal and got no effect. I've also tried to use enhancer manually on classes, but still getting

explained in the manual , so if you have several objectdb.jar files, you have to update the relevant

  faber Faber The syntax of using JOIN in explained on this manual page . Using ON in a 

of objectdb?   kadirbasol Kadir BASOL You can read about backup on this manual page

Hello , i've made blank db project and opened with explorer.jar How can i add class file then push objects manually by explorer.jar   It only gave me blank : http://img543.imageshack.us/img543/7463/screenshot20130203at001.png     Here is second screenshot: http://img210

make the jar file to copy to tomcat and I don't know why. In the version were I manually created

defined classes. Notice, however, that similarly to the  Arrays.asList example from the manual

is explained in this manual page . support Support As I understand, I require having javax.annotation.xxx

- from the ObjectDB manual - by: "The following operations clear the entire persistence context

Herman You can define an index on a collection field as explained in the manual , and the index

the manual , but following this report an error message, which is missing in this case, should be added

??? junior Lekane Nimpa, Junior See this manual page regarding the configuration file path. support

.java:381) ... Thank you! adibe Adi Be Optimistic locking is explained in this manual page . support Support

. See the list of Comparable Data Types in the manual . support Support

!   Sandeep Sandeep Dhamale See the links to the manual in #2 above. You should prepare

when the process was shutdown manually after the error occured but it's hard to be certain. The error

being returned as otherwise I will have yet another overhead manually iterating over the resultset

to work https://www.objectdb.com/database/jdo/ manual /chapter9 There I also read that you can load new

on the UPDATE query manual page : Updating entity objects in the database using an UPDATE query may be slightly

Added support of editing enum values in the Explorer. Added logging of type registration . Added error message when using mapped by (inverse) collections and maps of invalid types. Changed JOIN FETCH to act as LEFT JOIN in path expressions. Updated the PDF manual . Fixed a possible deadlock