ObjectDB Database Search

51-83 of 83 results

Speeding up reporting queries with size() on list

Hi, I'm working on some reporting stuff in our application. One of few different reports should include activity on last modified objects. The query for now looks like this: select date(insp.lastModificationDate), insp.modifiedBy, insp.description.length(), insp.products.size(), insp.picture from

Low performance when getting grove roots

Hi, I have a grove- like structure of objects, every objects referencing its parent. Root objects have null as the value of this parent reference. To find the roots I execute a query. If the number of objects in the tree is significant, this query takes almost forever, it seems ObjectDB loads

Optimistic locking: prevent version increment on entity collection attribute

? Something like the equivalent of @OptimisticLock(excluded=true) in Hibernate? Thanks, Farid oudjanef

License Activation Change and Checking Activation

software protection, but this technique is sensitive to changes like disabling a network adapter

Attempt to begin a new transaction when a transaction is active

like this : com.objectdb.jpa.Provider   From other beans I need concurrent access to the database

ObjectDB Roles and Groups

Hello, How can I incorporate roles/group in ObjectDB config file? I see no support for this. For example, I would like to place several users under a given group or role, but I see no way of doing this as no such element is present  in the config file. Is it possible to have this? st.clair

"Failed to serialize instance" of Set problem

of Google collections. Please try it. support Support Looks like it works in 2.4.7_06 Regards, Vladimir tsichevski Vladimir Tsichevski

deadlock with newest version 2.4.4_16

and what caused the deadlock? we would like to use this in production but i think at this time

explorer NullPointerException

is gray and disabled(has no stack trace),just like the picture I have uploaded。 so,the main problem

DB Explorer and Doctor unable to open DB file

and Explorer worked. I made a starting script for them, so I am willing to use them like

Failed to commit transaction: Attempt to commit a rollback only transaction

against the same objects being queried by the other client. Seems like some sort of locking problem

Mismatch client-server protocol prefix

Ralph Moser Looks like very ordinary code. Could you check the database with the ObjectDB Doctor

ObjectDB Manual

Hello, I would like to be able to read or refer to the ObjectDB manual (v2) on my Kindle. Unfortunately, I didn't find any option to download the manual, either as a .pdf (most convenient) or as a zipped set of .html files (a single file would be better for an easier conversion to .pdf

Update Entity references if we change the type of an entity

Hello, we must change (extend) our entity model and therefor we convert the type of some entities. As example ( like in the attached example): We have an EntityA that have a reference to an EntityB. But now we introduced as example a new Entity NewKindOfEntityB. And we have a defined logic

Does ObjectDB create one instance of each entity class on (web app) load ?

and inspect each instance, each one has a GC root with a  path (from the instance) like : this r : UTY _b

Problem with queries on lists with reverse mapping

= query7.getResultList(); assertEquals(1, q7results.size()); It looks like the result is not filtered

Installing a VM security fix leads to inactive DB

! Kevin Kevin Pfaff Only changing MAC addresses should  require re-activation, so it is likely

Missing Data on Retrieval (0, null values)

am very impressed from your great help for such an (un)devoloper   like me! Best regards, Harald

Selecting random rows

Hello is there way to get random rows? Functions like rand(), random(), newid() doesn't work ;/ for example: em.createQuery("SELECT s FROM StawkaVat s ORDER BY rand()").setMaxResults(5).getResultList(); gives exception: Exception in thread "AWT-EventQueue-0" [ObjectDB 2.5.6_02] SELECT s FROM StawkaVat s == rand

Incremental online backup

. support Support Isn't the Transaction Replayer more like the opposite of this? The Transaction Replayer

Error with org.springframework.data.jpa.domain.AbstractPersistable

I am working on a Spring Boot application. I want to integrate ObjectDB with Spring Data JPA. I refer to the http://www.objectdb.com/database/forum/860 to do the configuration. When I start up my application, I got below error. It seems like ObjectDB does not support a generic @ID in the super

app.jelastic.eapps.com and objectdb

that in embedded mode using ObjectDB is like using any Java library (i.e. adding a JAR file

Exception on creation when running multithreaded

an improved fix. support Support Looks like this version works. Thanks, Eitan eitane Eitan Eibschutz

Join query problem with new statetment

;InspirationsPerSupplierResult is defined like this: public class InspirationsPerSupplierResult implements

Unlimited JPA Persistable Types

I think it would be revolutionary if it were possible to persist any Java object, not just the standard SQL-based objects. Perhaps introducing an annotation will allow for this, something like @BasicType. The ability to store the state of an entire application would be a new innovative approach

retrieval again and again started

as already mentioned in other posts the database again and again goes for a retrieval like : RetrievalTask.reportPrimaryResult0: page#2356263, reader.getPos() = 53 or  [2024-07-04 10:07:11 #45 store]  RetrievalTask.reportPrimaryResult0: page#2809028, reader.getPos() = 0 [2024-07-04 10:07

NullPointerException in __odbGetNumMember

side (including in improving the error message), since it is like a partial build of a Java application

spuriously objectdb objects have null references

methods and protected them with synchronized like :   ... private static Object lockBegin = new

Server crash - Mismatch client-server protocol prefix

to go on; I can provide a snapshot of our database via private channel if you would like . FastModel Ben

Why does ObjectDB duplicate classes from javax.jdo:jdo-api?

packages and classes that clash with the JDO API's JAR? If a project uses JPA and JDO, it is most likely

InternalException caused by OOM: Metaspace

Our java server app using objectDB threw this mistake. Looks like due to OutOfMemory exception, but the app was running with -Xmx12G and before the mistake there was used 1,6G from that heap. Although Metaspace can happen independently on the heap usage I believe. Stacktrace follows: [ObjectDB 2.5

UPDATE statemen crash when i put the WHERE clause.

Hello, i have a problem with a UPDATE statement. When i run the code without WHERE clause the cod is executed, but when i attach the WHERE the program stop there. The code looks like this. EntityManager em = emf.createEntityManager() ; em.getTransaction().begin() ; EntityManager updateEm = emf

javax.servlet.ServletException: Annotated methods must follow the JavaBeans naming convention. __odbHidden_getPropertyName

to something like getOdbHidden can solve the problem. Please try build 2.2.6_01 that tries exactly