db4o Developer Community

Hi! The ones defined without a backing field: public SomeProperty {get; set;} Goran

I was going thru some of this stuff, but I'd found no answer for auto-increment on db4o-tutorial, so here's what I came up with, I'd really enjoy if you guys would give your points of view about it... Simple OO stuff, let's make a SuperEntity abstract class..I'm using C# for it.  using Db4o; public abstract class SuperEntity { } ...

I have a big database (300MB) with no indexes. Millions of object. As of today i configured db4o to use indexes for certain fileds in my class. Will these indexes propagate to the old objects in the DB, or they will start working just for the new ones? I am not very clear on this aspect. I still do not see major performance improvement in my ...

I'm playing around with db4o to see if I can use if for future projects. I have created a simple application with one entity to store. The entity has a string data member that I require to be unique. I will always retrieve objects based on this data member thus I removed the class index and and defined a new one for the data ...

> To do this, call the following two lines *before* you call > > fillUpDB() > Db4o.configure().objectClass(Car.class).objectField(''pilot'').indexed(true); > Db4o.configure().objectClass(Pilot.class).objectField(''points'').indexed(true); Carl,  thanks for tip. Unfortunately it doesn't work. Result is forever ...

Thank you Carl, > If you want to measure the difference between indexed > queries and non-indexed queries in one app, you should > test storing and retrieving objects of different classes. I cut the example to only one searching method - fullIndex: import java.io.File;import com.db4o.Db4o;import com.db4o.ObjectContainer;import ...

Hello guys,I'm using db4o6.1 + JDK1.5.0_09 + Windows2000.I have a data object ''Book'', the codes as the follows,public class Book {    private long bookId = 0;    private String isbn = null;    private String title = null;    private String author = null;    private String ...

I use db4o.net 6.0 for net 1.1 and ObjectManager 6.0 I have some indexed properties, but ObjectManager shows this fields as indexed false  Is this an error in ObjectManager?

moamoa:I have a number of utility classes that work on objects that extends my IdName class. Therefore I want the objects I store to extend this class in order to be able to use my utility classes on them. It seems that if I want to use an index on the ''id'' member it can not be inherited and must be declared explicitly in each class. This then ...

moamoa:public abstract class IdName {     public int id;     public String name;        } and public class Supplier //extends IdName {     public int id;     public String name;            ...