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forum_thread

Problem with distinct select, order by and equivalent alias/attribute path

Hi, while working with a (standard-)JPA-query generating framework we run into an exception when ordering the results of some projection when the order by expression is different (though logically equivalent) to the projection expression. Here is the example: #1 2016-01-10 10:19 Hi, while working with a (standard-)JPA-query generating framework we run into an exception when ordering ...

 
forum_thread

Object DB vs EclipseLink/TopLink: Unloaded relationships in detached entities

This topic is for those considering migrating from EclipseLink JPA or TopLink to ObjectDB JPA. #1 2011-06-03 20:30 This topic is for those considering migrating from EclipseLink JPA or TopLink to ObjectDB JPA. This conce ...

 
manual

[ODB1] Chapter 3 - Persistent Classes

Explains what a persistence capable class is and which types are supported by JDO. Persistent Classes are user defined classes whose instances can be stored in a database using JDO. Instances of these classes that represent objects in the database are called persistent objects or persistent instances . Objects that do not repre ...

 
forum_thread

Date field Index is corrupted due to time change

Hi, can you shed some light on why we cannot delete data from the attached DB file. A delete attempt with DB explorer results in the following exception: #1 2015-11-03 06:52 Hi, can you shed some light on why we cannot delete data from the attached DB file. A delete attempt with ...

 
forum_thread

Performance problem

Hi, we have a strange performance problem with ObjectDB 2.5.3_01 and JBoss 7.1.1. We have two ObjectDB databases on one ObjectDB server. Production database is running 5-10 times slower than test database. Their size and number of records are almost identical. When running production database in separate test environment its speed is very good. We did a performance analysis on our 2 linux servers one running JBOSS and other running ObjectDB. - CPU utilization of JBOSS server is max 5-10% (per core) #1 2014-01-13 18:57 Hi, we have a strange performance problem with ObjectDB 2.5.3_01 and JBoss 7.1.1. We have two ObjectDB databa ...

 
forum_thread

PersistenceException UserException: Failed to validate persistence.xml

I'm really tired of looking at the same exception all day. I have DaoService which gets initialized when app starts. #1 2013-07-31 23:30 I'm really tired of looking at the same exception all day. I have DaoService which gets initialized when ...

 
forum_thread

First query takes 4+ minutes to complete

Hi, we are evaluating ObjectDB 2.5.1_04 in embedded mode hoping to replace SQLite in our application. We observed that in our case it takes on average more than 4 minutes to complete the first SELECT query that we run on the DB which contains about 320,000 records of a single type of object. SQLite in comparison responds within few seconds on average with the same number of records. We hope to receive your recommendation on how to improve this result with this post.   Test System #1 2013-08-05 05:44 Hi, we are evaluating ObjectDB 2.5.1_04 in embedded mode hoping to replace SQLite in our application. ...

 
issue

Unexpected Exception during commit

I'm testing code that otherwise has been working with a clean database. I have seen several examples of the following exception. It never seems to happen in the same place twice, though. If you can give me a hint as to what would internally cause this, I'll try to reproduce it. Carl   Bug Version: Priority: Normal Status: Fixed Replies: 5 Type:  Bug ...

 
forum_thread

Explorer in 2.3

First, the new Explorer in ObjectDB is fantastic! This is exactly what we've needed - an easy way to do ad-hoc JPQL queries and navigate through the results and even make small changes to primitive data and Strings. After playing with it for a while, here is a list of additional features I'd love to have: 1. Export of selected data: a. Simple - Select a range of cells or a column header and copy text to the clipboard or save to a file (csv, html, etc..). (There appear to be copy menu options, but I cannot get them to work.) #1 2011-10-04 20:50 First, the new Explorer in ObjectDB is fantastic! This is exactly what we've needed - an easy way to do ad-ho ...

 
forum_thread

Server connection management

The server does not appear to release broken connections. My typical development pattern is to keep reloading my war file in tomcat until the permgen space runs out, and then I kill and restart tomcat. After a few days of this, the server stops responding, and I see the following in the server logs: #1 2011-04-06 14:16 The server does not appear to release broken connections. My typical development pattern is to keep reloading my ...