db4o Developer Community

Hi, In my life of Java development, I have used JDBC to homegrown solutions to EJB to hibernate in various projects.Currently I use hibernate in current application. As a small module, we had a requirement of displaying statistical data and Charts of various types. I had to use pure JDBC for it. Most queries look like: select count(distinct ...

I work for a company that is evaluating DB4o, but we have come across some performance issues.  I understand that the .NET version of DB4o includes all the optimization functionality.  I am using .NET 3.0 and DB4o 6.105, and the queries that I am executing aren't being optimized, even when ...

I have been using db4o version 6 for Java for a few weeks. I have seen some erratic behavior (as if there is some runaway thread after the query returns) while trying to sort the results of a native language query using a Comparator. I am also using an enum in the comparison. I would need to do some work prior to posting any examples, but I ...

Is there a document anywhere where current limitations of Native Queries are listed?My problem today is writing the NQ equivalent of this SODA: com.db4o.query.Query q = _dataSource.Data.Query(); q.Constrain(typeof(LanguageForm)); q.Descend(''_form'').Constrain(''findme''); ...