Fast Object Database for Java - with JPA/JDO support

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how explorer queries work

i'm curious as to how the explorer is able to execute queries when its obviously not aware ... to execute somewhat generalized queries and i won't know what classes are in the object model ahead ... need the classes for running ordinary queries. However, if you use user defined methods in queries

Error 990 when querying a class with persistence-capable-superclass

: Query query = pm.newQuery(); query.setResult("count(this)"); query.setClass(myClass); return (Long) query.execute(); All queries (eg ones with parameters) on the same class fail with the same ... during cleanup of query execution in a finally block. Maybe there is another problem that stops

"where in" query

Is it possible to run a query selecting values that exist in a provided list? e.g. something like ... below). The only similar examples I can find in the docs involve a join query - but my list isn't in the database ... : Unexpected query token 'IN' at com.objectdb.o.MSG.d( at com.objectdb.o.TKN.J(

JPQL query to get entities that does not have a child entity in their child entities

_Started        2105:12:10 14:00:00      004 From these 2 tables I have to query for Jobs having ... TomEE for deployment. I am using following queries. FINISHED Jobs between a time interval: @NamedQuery( name = "findFinishedJobsBetweenTimeIntervals", query = "SELECT J FROM JobEntity J, IN(J

JQL-Update Queries fails with activated L2-Cache

When using JQL-Update Queries it is basically not working without calling entityManager.clear ... a container the updated Entities. Scenario 1: Disabled L2 Cache, updating elements using UPDATE-Query ... UPDATE-Query, calling entityManger.clear() and fetching Entities afterwards from database. Expected

IMK Stall with certain query

Hello, I am experiencing constant IMK Stall notifications from Java when using certain query ... am sure it is linked with objectdb as these are thrown each time one particular query is used ... query = cb.createQuery(OrderData.class);        Root order = query.from

Explorer query functionality

Is there a way in the Explorer to associate JPQL queries with query result windows? I would really like to be able to open multiple query / result tabbed panes and be able to save out my queries ... the titles of Explorer query result windows show the query string. This is a small quick fix. It is not

Removed entities can be found by query in the same transaction

(). Afterwards the entity can be load again by query although the resulted entity have an attribute ... . Apparently the query was directed to the wrong snapshot. Are you sure that this bug exists in 2.7.4 ... . When changes are flushed, a snapshot is generated, and further queries in that transaction uses

Querying error - java.lang.ClassCastException: com.objectdb.o.STV

I'm getting the ClassCastException below when querying objects. As yet I haven't been able to track down the exact circumstance in which it occurs - saving and querying objects works fine on attempts ... Source) at rbccm.felix.gridservice.admin.dao.SimpleWorkflowInstanceDao.query(Unknown Source

Entity Type is not found (error 301) in Query

, EclipseLink For ObjectDB there is one query in following method, where the full qualified class ... :695) at at.sciencesoft.db.jpa.DAOjpa.query( at at.sciencesoft.user.User ... - the query works with the simple class name. Breaking down the code for simple example would be little

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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