About @Entity

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Null Exception

An user reported me this exception. I am not sure how to reproduce it, but maybe it can help you somehow to solve it.  Object DB 2.4.4_05, embedded The important part is: #1 2012-11-04 09:43 An user reported me this exception. I am not sure how to reproduce it, but maybe it can help you to solve it some ...

 
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DB Doctor sets type to "unknown" for new fields

Hi, we are using ObjectDB 2.5.4_04 on Linux. We added two new Boolean fields to a persistable type and run DB Doctor on the exiting DB file in order to update the schema. The fields are added to the schema as expected, however their type is set to unknown - we were expecting Boolean. The attached DB file is what was produced by DB Doctor after adding the emergency and broadcast fields. If you run in DB Explorer #1 2014-05-29 03:04 Hi, we are using ObjectDB 2.5.4_04 on Linux. We added two new Boolean fields to a persistable typ ...

 
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Out of memory

Hi, Today in the middle of the night ODB just crashed leaving this on console screen: #1 2012-09-18 07:06 Hi, Today in the middle of the night ODB just crashed leaving this on console screen: ObjectDB Serv ...

 
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How to delete M2M relationship?

In user model class I have the following: public class User implements Serializable { #1 2013-08-06 19:19 In user model class I have the following: public class User implements Serializable { ...

 
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Deadlock in objectdb code

Running multi-threaded access to an embedded database using JDO, I'm getting a deadlock in objectdb code.  Thread dump attached. #1 2013-05-22 17:15 Running multi-threaded access to an embedded database using JDO, I'm getting a deadlock in objectdb code. &nb ...

 
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Explorer doesn't open file

Explorer doesn't open file...see attached error message and odb.  Explorer doesn't cleanly close the connection either (due to error I presume). Many thanks Russ #1 2017-02-16 10:28 Explorer doesn't open file...see attached error message and odb.  Explorer doesn't cleanly close the ...

 
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alter table

Hi: After a table built by real data, how to alter table structure, such as: alter table add column ... alter table add index ... TIA #1 2011-08-23 05:11 Hi: After a table built by real data, how to alter table structure, such as: alter table add colu ...

 
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Example database world.odb

Hello! Where can I find classes for example database world.odb? Thanks for the answer.   #1 2012-04-27 05:59 Hello! Where can I find classes for example database world.odb? Thanks for the answer. &n ...

 
issue

Exception in thread "main" java.lang.NoSuchFieldError: __odbTracker

Hi   there is something wrong with enhancement process I got that class was succesfully processed, log has size 0, enhancer is from build objectdb-2.2.8_08 and during object creation when some filed is initialised i got an exception   Exception in thread "main" java.lang.NoSuchFieldError: __odbTracker at com.package.Network.__odbSet_Connections(Network.java:1) at com.package.Network.<init>(Network.java:95) at com.package.EnhancementTest.main(EnhancementTest.java:14)   Bug Version: 1.04 Priority: Normal Status: Closed Replies: 3 Type:  Bug ...

 
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Fetching Collections Puzzle

I am working on a project where I need to travel through a massive graph of objects. One of the main entity is the Node which is shown below. class Node { Node parent List<Node> children Node rightSibling Node leftSibling int rank } I have the following issues/doubts #1 2011-04-23 23:08 I am working on a project where I need to travel through a massive graph of objects. One of the main entity is th ...