Fast Object Database for Java - with JPA/JDO support

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JPA vs JDO - which is more efficient for OneToMany queries?

field (again) or refresh it. 2) You have to persist both unless you have automatic cascade persist. In

Database Inconsistency or corruption

the database (e.g. by using refresh) both sides will reflect the new relationship

Query perfromance problem

ms Refreshing this page with any other column for index with @Index set on it, lowers this time do 1

Object explorer cannot open odb file. ObjectDB many-to-many relationship

.refresh(u1); ///fetch the Assignements collection of u1 assertNotNull(u1.getAssignements


only after I refreshed the workspace and cleaned then project. Thanks for your help. cmahony cmahony Craig Mahony

Optimistic locking: prevent version increment on entity collection attribute

the collection and not delete any of the Readings from the DB. Also, refreshing or reading the Document from

How to delete M2M relationship?

(you can use clear or refresh to enforce update). support Support

Entity not removed 100%

then you only have to clear the owner side, the owned side will be cleared automatically after refresh

ObjectDB without javax.persistence

.java:205) at com.btc.ep.base.ui.navigator.ProfileNavigator.refresh(

mappedBy problem

when the object (Employee) is retrieved or refreshed from the database - as long as the owner side is set

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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