About @Query

forum_thread

auto generate timestamp

Hi all, How can I create auto timestamping column? I want the database to generate the timestamp. I tried google but suggested solutions doesn't work in objectDB. http://stackoverflow.com/questions/811845/setting-a-jpa-timestamp-column-to-be-generated-by-the-database - Pawel   #1 2011-08-11 05:23 Hi all, How can I create auto timestamping column? I want the database to generate the timestamp. ...

 
issue

Negative snapshot user count exception

I found the following stack trace in my log files; it's cropped up a number of times: Bug Version: 2.5.2 Priority: Normal Status: Active Replies: 8 Type:  Bug ...

 
forum_thread

Online backup with JDO

Hi, I would like to try the Online Backup tool as I am making backups up to now with the not encouraged file-copying method while the database is online. So my first question is to this file-copying. I've read at the Database Doctor that copying the db file while it is online may cause corrupted DB file. Does this mean that the copy can be corrupted or even the source file ? My second question is about starting the online backup. The manual suggests starting it via the EntityManager with the code #1 2014-07-04 20:10 Hi, I would like to try the Online Backup tool as I am making backups up to now with the not encoura ...

 
forum_thread

NULL prefered in ORDER BY?

Hi! Is there a way to NOT prefer NULL in Order BY? I.e. assume this: @Entity class Hint { private String name; } @Entity class Test { private Hint hint; } I've got a few Test entries, some do have a hint assigned, some do not (NULL). Now when I do something like SELECT FROM Test ORDER BY hint.name #1 2011-12-06 01:18 Hi! Is there a way to NOT prefer NULL in Order BY? I.e. assume this: @ Entity class ...

 
issue

[Explorer] Editing Database Files

Some features of ObjectDB 1 Explorer have not been implemented yet in the new Explorer of ObjectDB 2. The new Explorer of ObjectDB 2 is currently a viewer rather than editor, and database files are always opened in read only mode. The ability to create new database objects and edit existing database object has to be reimplemented in the ObjectDB 2. Feature Request Version: Priority: High Status: Fixed Replies: 4 Type:  Feature Request ...

 
forum_thread

objectdb explorer in ver 2.2 and 1.0

Hi   In first step  I have evaluated JPA API now I'm testing JDO API and I'have spotted that object explorer has lower functionality than in ver 2.2 eg garbarage collector or xml import/export functions are missing, could You explain why?   br Tomasz #1 2011-07-13 15:57 Hi   In first step  I have evaluated JPA API now I'm testing JDO API and I'have spotted tha ...

 
forum_thread

Reporting Engine?

New to java and objectdb - I am looking for a reporting engine to use with objectdb. Would birt work or is there something better matched? I am ideally looking for something template based with external template designer to customize the template.    #1 2011-06-09 12:30 New to java and objectdb - I am looking for a reporting engine to use with objectdb. Would birt work or is there ...

 
issue

Collation and String Order

ObjectDB should support selecting collation when a new database is created. The collation should affect the way strings are sorted in queries (with ORDER BY). Currently strings are always ordered by Unicode order, and a workaround that enables controlling the order is to use normalizing, as discussed in this forum thread and in this forum thread. Feature Request Version: 2.3.0 Priority: Normal Status: Active Replies: 1 Type:  Feature Request ...

 
forum_thread

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 ...

 
api-jpa

getCompoundSelectionItems()

Return the selection items composing a compound selection.(Method of javax.persistence.criteria.Selection)