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11

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 ... their proxies to retrieve additional dettached instances. If the object was detached through serialization
Forum
11

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

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
Issue
11

Sort of very large objects - out of memory

the following actions: 1) Create 5 persist threads which create and persist a large object in a loop 100 times each 2) Create 5 get threads which read 100 objects each in a loop based on object ... processing mechanism in sorting very large objects. This requires a fix, but meanwhile, adding a composite
Forum
11

Query can't see recently persisted object

does not appear to present a read consistent view of persisted objects within the same transaction. e ... . However if I call flush() on the EntityManager after the persist() the object will be found. Clearly ... the transaction. Is there a way of using or configuring ObjectDB to ensure read consistency of objects persisted
Forum
11

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
Manual
11

Index Definition

Querying without indexes requires iteration over entity objects in the database one by one. This may take a significant amount of time if many entity objects have to be examined. Using proper indexes the iteration can be avoided and complex queries over millions of objects can be executed quickly
Manual
11

WHERE clause (JPQL / Criteria API)

JPQL query that retrieves selective objects from the database. Out of the four optional clauses ... of this query defines an iteration over all the Country objects in the database using the c range variable. Before passing these Country objects to the SELECT clause for collecting as query results
Forum
11

Changing existing objects from Entity to Embedded

-only, made a migration utility which read the original objects, converted them to the new classes and stored ... this matter. Is the change of not-embedded to embedded supported by ObjectDB for existing objects ... . To use embedded objects you must declare classes as embeddable (rather than the reference fields as in
Forum
11

Does aggregate function "greatest" work on entity objects?

Does aggregate function "greatest" work on entity objects? do not come to the function "compareTo ... static final long serialVersionUID = 1L; @Override public int compareTo(Object t ... .DialogItem[ id=" + getId() + " ]"; } } Thanks for your help. Entity objects are not comparable
Forum
11

Embedding Managed Entities in Embedded Objects = bad idea

Discovered that you can't embed entities in embeddable objects if the entity is managed. Haven't tried embedding un-managed entities in embeddable objects, though I imagine that's not a great idea. The the error message isn't all that obvious (attempting to persist object which already has an id