About between

forum_thread

Import data from MySQL

Hi, I tried the objectdb in my research, find it very easy to handle without setting up xml files. However, I cannot find the import/export functions between other database, then how can I transfer mysql data into objectdb? When I use explorer.exe to browse the database in objectdb, eclipse tells me another app occupy it, then how can objectdb support multi-thread? ... However, I cannot find the import/export functions between other database, then how can I transfer mysql data into objectdb? ...

 
forum_thread

Source control of database

Hi, I'm new with ObjectDB. I want to know how I can evolve my model, adding new fields, new classes, perform refactors between versions, etc... There is something like http://www.liquibase.org that can I use over ObjectDB? ... model, adding new fields, new classes, perform refactors between versions, etc... There is something like ...

 
forum_thread

Degrading performance overtime

hi, We have an application that uses embedded odb database. We have configured odb to start at 50meg chunks and grow at 50 megs a time. as the files become larger between 1 and 2 gigs we start to see considerable degrade in performance caused internal objectdb locking: ... grow at 50 megs a time. as the files become larger between 1 and 2 gigs we start to see considerable degrade in performance caused ...

 
forum_thread

Convert embedded database to server

Hello, What is the right way to convert an embedded database to a server one ? As a result, will a file "db.odb" exist ?  If no, where will be located db files ? Regards, Xirt   ... for your answer. What are the pros and cons between an embedded database ( with remote connection enabled ) and a real ...

 
tutorial

Step 4: Create an ObjectDB Data Set

Explains how to create an ObjectDB data set for BIRT reports.... , p . y AS y FROM Point p WHERE p . x BETWEEN :low AND :high Use copy and paste to enter the above ...

 
api-jdo

setFilter(filter)

Set the filter for the query.(Method of javax.jdo.Query)

 
page

What is the Java Persistence API (JPA)?

... Relational Mapping (ORM) tools. The mapping bridges between the data representation in the relational database (as tables and ...

 
forum_thread

Query in JPA2 with LEFT JOIN on INNER JOIN

select a.description, a.id, p1.description, p2.description,p3.description from action a left join action_profile ap1 on ap1.id_action=a.id inner join profile p1 on  ap1.id_profile=p1.id  and p1.name='?' left join action_profile ap2 on ap2.id_action=a.id inner join profile p2 on  ap2.id_profile=p2.id  and p2.name='?' where a.id =?;   Thanks   ... should consider using direct references (relationships) between entity objects, and then you would be able to use ordinary JOIN of ...

 
api-jdo

javax.jdo.identity.StringIdentity

This class is for identity with a single String field.(Class of JDO)

 
issue

Adding objectdb-jee.jar to the maven repository

Hi, I can only find objectdb.jar releases in the ObjectDB maven repository. Would it be possible to include objectdb-jee.jar for the current and future maven releases? Thanks Andrew ... include objectdb-jee.jar releases. The difference between these jars is that objectdb.jar includes JPA 2 (javax.persistence, ...