About query

issue

ObjectDB 2 JDO Manual

The new ObjectDB Manual describes how to use ObjectDB 2 with JPA. An additional manual that focuses on using ObjectDB 2 with JDO can help JDO users. But since writing a new manual and then maintaining two similar manuals, one for JPA and the other for JDO requires sufficient effort, this will be done only if there is sufficient demand.   Documentation Version: 1.04 Priority: Normal Status: Active Replies: 8 Type:  Documentation ...

 
issue

JPA Metamodel (JPA 2.0)

The JPA Metamodel API enables examining the classes, fields and properties of the persistent object model, similarly to the Java reflection API. The JPA Metamodel API has a major role in defining queries using the JPA Criteria API. JPA Feature Version: Priority: Normal Status: Fixed Replies: 2 Type:  JPA Feature ...

 
forum_thread

Thread in BLOCKED state

Hello, Some on my threads stay in BLOCKED state in my thread pool. When i watch the stack trace, i see only just obfuscated object db code. ... know how to find the blocking problem ... I put a query timeout ( 300000 in value ), but it doesn't seems to have any effect, ...

 
forum_thread

What role is the JDO in ObjectDB?

Mike Keith believe the JDO is out of date. Then what role of JDO in ObjectDB? Will our codes with JDO be out of date? <quot ... be capable of producing and consuming them. JDO also had a query language that was decidedly object-oriented in nature, which did not sit ...

 
forum_thread

Possible issue for JPQL "LEFT [OUTER] JOIN"

Possible issue for JPQL "LEFT [OUTER] JOIN" is doing "[INNER] JOIN".   Thanks. #1 2012-04-20 18:19 Possible issue for JPQL "LEFT [OUTER] JOIN" is doing "[INNER] JOIN".   Thanks. ...

 
api-jpa

getSelection()

Return the selection of the query, or null if no selection has been set.(Method of javax.persistence.criteria.AbstractQuery)

 
forum_thread

Bidirectional OneToMany is slow on updated items

Hello, I have a problem with the following situation. I insert persons with addresses. In the first run, they are all new with a new address. It runs fast. In the second run, the persons are all loaded and got a second address. This seams to be much slower. The Entities are all enhanced by the javaagent (which you can see in the contained eclipse launch configuration) Is there any way to speed it up?       ... by (inverse) collection, and therefore requires a costly query execution You start feeling the cost of these operations, ...

 
api-jpa

createTupleQuery()

Create a CriteriaQuery object that returns a tuple of objects as its result.(Method of javax.persistence.criteria.CriteriaBuilder)

 
forum_thread

explorer feature request: ability to auto refresh

Request for feature: Ability to auto-refresh an explorer view, say at regular intervals of a few seconds. (at a minimum one ought to be able to manually refresh, for example the list of persistent types). additionally, it would be useful to be able to view an embedded database (read only mode) via the explorer.   #1 2011-04-27 07:22 Request for feature: Ability to auto-refresh an explorer view, say at regular intervals of a few seconds. ...

 
api-jpa

javax.persistence.criteria.CriteriaBuilder.Case

Interface used to build general case expressions.(Interface of JPA)