About delete

forum_thread

Database crash

just running objectdb we run into a crash situation as described in the attached log. What can be the reason for such a behaviour ?   ... edit delete hgzwicker ... edit delete support ...

 
forum_thread

How to Use a SF with extended Persistence Context?

Hey, I have a problem to use SF with an Extended Persistence Context Regarding to Transactions. The need for an extended persistence Context emerges for the need to create queries in advance for fast execution so I need to store the queries and I need an EntityManager that doesn't get closed between calls. When I call the SF directly no problem happens but if I use SL to hold a reference to the SF I get com.objectdb.o._PersistenceException: Attempt to begin a new transaction when a transaction is active. ... edit delete dreckguy ... edit delete webel ...

 
manual

ObjectDB 1.0 Manual

... Objects Shows how to store, retrieve, update and delete database objects. Chapter 7 - JDOQL Queries ...

 
faq

How to install ObjectDB?

ObjectDB is distributed as a zip file. Just download and extract the ObjectDB distribution zip file. No need to run any install or setup program. You can uninstall ObjectDB by deleting the ObjectDB directory. ObjectDB does not modify the registry or ...

 
manual

ObjectDB Developer's Guide

... Shows how to use JPA to store, retrieve, update and delete database objects. Chapter 4 - JPA Queries (JPQL / Criteria) ...

 
api-jpa

getSingleResult()

Execute a SELECT query that returns a single untyped result.(Method of javax.persistence.Query)

 
api-jpa

getSingleResult()

Execute a SELECT query that returns a single result.(Method of javax.persistence.TypedQuery)

 
api-jdo

isDirty(pc)

Tests whether the parameter instance is dirty.(Static Method of javax.jdo.JDOHelper)

 
manual

Database Connection using JPA

Describes the main JPA interfaces: EntityManagerFactory, EntityManager and EntityTransaction.... that affect the content of the database (store, update, delete) must be performed within an active transaction. The ...

 
api-jpa

javax.persistence.OrderColumn

Specifies a column that is used to maintain the persistent order of a list.(Annotation of JPA)