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44

Object DB In memory : without Filestore

completely in Memory ? (without any writes to Disk, it's okay to loose the data if the node is down ). I ... the Object DB completely in memory without disk storage. thanks, Sandeep Sandeep Sandeep Dhamale At the moment, ObjectDB doesn't support pure in memory mode, but it still can be used completely in
44

IN operator syntax

Hi, what is the correct syntax for IN operator when list of literals ia used instead of parameter, e.g. SELECT FROM Info i WHERE i.status IN (1,4) ? (Suppose status is int.) I always get this exception: SELECT FROM Info i WHERE i.status IN (1 ==> , <== 4) javax.persistence.PersistenceException
44

Empty temporary dat files in the temp folder

Hello, We have questions regarding the pagesX.dat files in the temp directory. We detected ... , begin a transaction, do some stuff (find, persist, remove …) and then commit or in the case of errors rollback the transaction and closing the EntityManager. In some scenarios we use additional databases
44

disabling JDO in objectdb embedded mode

Hi, i am using objectdb (version 2.6.8) in embedded mode. I deployed an .ear project in glassfish ... jars, maybe of another JDO implementation in your web application or class path. support Support Hi ... for each single exception. I even don't see a trace that is related to ObjectDB. The trace in #1
44

How to package orm.xml when using EJB in WAR?

Hi, I have database utility classes in one project, the id's use sequences declared in an orm.xml ... "/>         </properties>     </persistence-unit> both persistence.xml and orm.xml are located in src/main ... the jar file embedded in the war file OK. However, even when duplicating the orm.xml, a different error
44

Failing in embedded mode, correct javax.persistance?

I'm trying to run the tutorial example as given in the tutorial on ObjectDB's net pages. I am using ... , contents etc. Since I am running the program in embedded mode, this file should not be necessary ... (); …. the code continues as in the tutorial… (I should mention that I have tried running NetBeans in
44

Query in JPA2 with LEFT JOIN on INNER JOIN

How write a query in JPA2 with LEFT JOIN on INNER JOIN? select a.description, a.id, p1 ... faber Faber The syntax of using JOIN in explained on this manual page. Using ON in a JOIN close is invalid in JPQL. Instead of ON you may include all the variables in the FROM clause: FROM action
44

Server vs embedded mode in multi-instance scenario

. There is an undocumented feature that allows using a combined embedded-server mode, in which the database is accessed in embedded mode by the main user (e.g. the web application) but is still accessible by ... -server enabled="true" /> ... Now you should be able to open the same database in "embedded
8

ClassCastException in Tuple.get

down. Is it possible to add type check before the cast and throw more meaningful exception in such case ... Maciek Chabros Just to let you know, in most places I managed to replace multiselect and tuple queries ... the limitation in docs. Cheers! hobson Maciek Chabros It would help if you could isolate the issue and provide
8

InternalException when using MEMBER OF on a large list in a query

with the Doctor. If the error repeats, try to fix the database by running the Doctor in repair mode ... the exception by execute the Query in the explorer. Also with the outcome of the Doctor in repair mode ... because of a bug in handling query results that combine large objects with long primary keys. In

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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