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8

Object Relations Error after Schema Change

, until a user that still has the old version of the class accesses the database. Please verify ... database to another ObjectDB database, we think starting with a new DB would help resolve ... . Could you please check the database with the ObjectDB Doctor and post the output? In addition, you can try migrating
Forum
8

First query before any of the object has been stored

I have some code that, before writing an object via ObjectDB makes a query to ensure the new object is different from what's already stored.  The problem is that, before any instances of that object ... some other persistence related exception.  How can I know if any of an object has been stored
Forum
8

Benchmark native JPA of Versant database (without datanucleous)

Now Versant DB (db4o commercial) has JPA implementation    Can you benchmark this Object Oriented DB to compare with Object DB? Since the Versant Object Database (unlike db4o) is not open source it would be impossible to include it in the JPAB benchmark results without the consent of Versant
Forum
8

database optimization

Hi, couple of questions regarding database optimization: 1) Noticed something odd with the level 2 ... , on the same set of objects.       Memory management in Java is a complex topic and in some cases smaller cache might be slightly more efficient because keeping objects in memory for longer time has some
Forum
8

World database - Changing country ID

of an existing entity object is not allowed and the Explorer should be fixed to prevent it. If you have to change the primary key you should create a new entity object with the new primary key and delete the old entity object (and of course, update relevant references). Regarding the primary key in
Forum
8

internal object DB locking in an embedded multi threaded application

to how we can improve / elviate this? our database files are between 100 and 500 meg when this occurs. It doesnt ... to drive a persistent queue.   Dan   The second stack trace (thread t@16) indicates database file ... database size). If no conf file is found or provided then what are the default values? The default
Forum
8

Database is locked when in use

the odb files in the file system but the same i was able to do it in object db 1.0. We supprt export ... for us :-( Do you have any settings or other way to handle this? Using copy & paste to clone a database when it is in ... to cast PersistenceManager to EntityManager. In ObjectDB the same object is an instance
Forum
8

calling persist on an object more than once

a better help message (ie: 'you called persist more than once on object xxxx'), and b) to throw ... , since usually persist does access the database, so checking for existing entity in the database is only performed on commit or flush. dmoshal
Issue
8

Error reading UTF string (Serialized Objects in Explorer)

.MitgliedVertraegeFragment')).contracts IS EMPTY)))   The attached database is empty. hmm weird.. ok ... objects in the Explorer but no exception is thrown - only the serialized fields display an error message ... fixes the Explorer only, right? If you have a problem in retrieval of this entity object also in
JPA Doc
8

javax.persistence.TypedQuery

object was set to retrieve. The position of the first result the query object was set to retrieve. Returns 0 if setFirstResult was not applied to the query object. Returns: position of the first ... for the query object, returns the flush mode in effect for the entity manager. Returns: flush mode Since: JPA 2