About JOIN

issue

Threaded Test - Failed to commit transaction: Unexpected internal exception

Hi I'm trying to create a simple producer-consumer queue scenario but am getting the followin exception: Bug Version: 2.2.7 Priority: Normal Status: Fixed Replies: 16 Type:  Bug ...

 
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What algorithm in find()

I test the time cost for find(), obtain a linear complexity with the following codes: #1 2011-05-24 23:44 I test the time cost for find(), obtain a linear complexity with the following codes: int iBlock = ...

 
release

2.6.9

... (no access during backup operation). Fixed JOIN FETCH bugs. Fixed a performance issue with mapped by fetch. ... in Mac OS. Fixed a bug in using FETCH JOIN in criteria queries. Fixed a bug in cascading remove when ...

 
forum_thread

'DROP TABLE' in ODB?

Let's say I no longer need some entity in my project and after deleting all the objects of this type in database I want to remove this type from schema. How can I do this? Is there something like SQL 'drop table' in ODB? #1 2012-03-14 07:39 Let's say I no longer need some entity in my project and after deleting all the objects of this type in datab ...

 
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IN expression in a Criteria Query

Hello, I am trying to migrate my Spring project from Hibernate to ObjectDB. On ObjectDB page, it is written that ObjectDB is 100% compatible with JPA. However, I have problem with this JPQL query: SELECT e FROM Employee e WHERE e.present = false AND NOT EXISTS (SELECT c FROM Computer c WHERE c.employeeEntity = e) ORDER BY e.name with Hibernate, there was no problem with this query, but ObjectDB throws exception: #1 2013-04-23 14:23 Hello, I am trying to migrate my Spring project from Hibernate to ObjectDB. On ObjectDB page, it is writt ...

 
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@OneToOne query issue with OR and IS NULL

Hello, I'm struggeling to get a query run right. I have 2 entities (simplified) ... this equivalent query: SELECT a FROM A a JOIN a . another b WHERE a . another IS NULL OR b . ... navigation through a relationship is implemented using JOIN (i.e. INNER JOIN ), and only the A instance that has another ...

 
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Class loading problem with private packages in OSGi environment

Our Business Objects are the JPA entities. We develop our product domain driven. This means we have several domains. Each domain is split into business layer and persistence layer (others are not relevant here). Per domain and per layer, we have an OSGI bundles. The business layer should have no dependency down (an exception is the dependency to the ObjectDB for the enhanced entities).  The persistence Layers have a dependency to the business layer and to the central DataAccess Layer. #1 2015-02-05 07:46 Our Business Objects are the JPA entities. We develop our product domain driven. This means we have several domai ...

 
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Exception while accessing the Persistence unit ...?

Hi, I am new to ObjectDB I was trying your eclipse/jee6/glassfish tutorial. I am getting the following exception: #1 2012-04-09 04:39 Hi, I am new to ObjectDB I was trying your eclipse/jee6/glassfish tutorial. I am getting the following ex ...

 
release

2.6.8

... (no access during backup operation). Fixed JOIN FETCH bugs. Fixed a performance issue with mapped by fetch. ... in Mac OS. Fixed a bug in using FETCH JOIN in criteria queries. Fixed a bug in cascading remove when ...

 
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 ...