db4o Developer Community

I am using a NL query in Java to do a search with an enum field as a criterion. The field is indexed. It seems that it only works if I compare the ordinal values of the enum. When I say it ''works'' I mean that I get the correct number of objects back. Without the ordinal methods the enum field seems to be treated as unconstrained. Is this ...

Hi,  I'm using db4o in a java environment and Apache Avalon/Excalibur as my component framework. Working with the local mode everything works fine for me. But switching to embedded client-server mode a ObjectNotStorableException is throws while performing native queries. I recognized that after the exception is thrown the db4o object manager ...

Hi,we are new users in db4o and have the following problem using a java class construct like:class Folder {    Stirng name;    List mails;}  class Mail {    String subject;}Now we have some folders (e.g. ''inbox'', ''sent'' ...) containing mails.We are trying to search for mails with a subject ...

Hello all, i'm newbie to db4o (and java for this matter). i was trying to work some queries using the ObjectContainer.query method passing a predicate like this: java.util.List <Pilot> pilots = objectContainer.query(new Predicate<Pilot>(){ public boolean match(Pilot pilot) {        return ...

Hi, I am evaluating db4o for use at work. We store a single table of fairly simple data (no joins, just one class with 13 or so string/long fields), but it needs to be able to handle millions of records. Currently we are using a normal SQL database, but some of the queries are a bit slow: 10-20 seconds is too much. I am having trouble getting ...