About JOIN

issue

JDOQL Subqueries (JDO 2.1)

Subqueries (or nested queries) have been added to the JDOQL (JDO Query Language) in version 2.1 of JDO. This is currently the main feature that of JDO 2.0-2.1-2.2 that is still missing in ObjectDB 2. JDO Feature Version: Priority: Low Status: Active Replies: 0 Type:  JDO Feature ...

 
forum_thread

adding tutorial videos to youtube

Hello , it will be good for you to add video tutorials for objectdb and explorer on youtube. #1 2013-02-02 22:45 Hello , it will be good for you to add video tutorials for objectdb and explorer on youtube. ...

 
issue

Support for roles/groups in ObjectDB

ObjectDB should incorporate roles/group in ObjectDB config file? I see no support for this. I would like to place several users under a given group or role, but I see no way of doing this as no such element is present  in the config file. Maybe under the $default, or any particular user, there could be a role/group element which would categorise the user further. This would help in authentication.   Thanks Feature Request Version: 2.3.3 Priority: Normal Status: Active Replies: 0 Type:  Feature Request ...

 
api-jpa

JoinTable.joinColumns

(Optional) The foreign key columns of the join table which reference the primary table of the entity owning the association.(Annotation Element of javax.persistence.JoinTable)

 
api-jpa

MapKeyJoinColumns.value

(Required) The map key join columns that are used to map to the entity that is the map key.(Annotation Element of javax.persistence.MapKeyJoinColumns)

 
manual

[ODB1] Chapter 7 - JDOQL Queries

Explains how to use JDOQL, the Java/JDO Query Language.... Unbound variables, which serve as a replacement for the JOIN operation of SQL Support of bound variables is mandatory, but ... by JDO. Queries with unbound variables are similar to JOIN queries in SQL because every combination of variables has to be checked ...

 
forum_thread

Object explorer cannot open odb file. ObjectDB many-to-many relationship

I created a data model to test many-to-many relationship with a link table as following (full code in attachement) #1 2011-11-24 15:38 I created a data model to test many-to-many relationship with a link table as following (full code in attachement ...

 
forum_thread

Error reading UTF string

Good day, I have many errors like this, when try to use java.util.UUID as string in querys. #1 2013-10-03 15:21 Good day, I have many errors like this, when try to use java.util.UUID as string in querys. 16:18:4 ...

 
forum_thread

Error 613 - i cant put a list<Athlete> into a Squad object

hey guys Im a swiss student and my english is not that good and ive never posted in your forum, so thats why im sorry if im doing any mistakes, but i have big trouble, because ive to get this straight till end of week. i uploaded also all classes but if u see the problem in the main problem field the classes are copied after the problem description. the structure: #1 2011-04-04 17:38 hey guys Im a swiss student and my english is not that good and ive never posted in your forum, so thats ...

 
forum_thread

OutOfMemoryError on search after update on DB created with DB Doctor

It looks like there may be an issue with the DB files created with DB Doctor in recovery mode. This is the scenario that results in the OutOfMemory exception problem (using Object DB 2.5.4_04): 1. We instruct Object DB to create a 1Gb DB file on initial start-up using: <database> <size initial="1024mb" resize="256mb" page="2kb" /> This happens as expected. #1 2014-03-11 01:36 It looks like there may be an issue with the DB files created with DB Doctor in recovery mode. This is the scenar ...