About modify

forum_thread

How storage works?

I have one Class Car that contains a ArrayList of Wheels. I have already one Car with 4 Wheels attached stored in the DB. If I update my Car adding a new Wheel object is all the Car updated? Or only changed part is updated? By other words, If I have one complex data model and only one part is changed, the Object DB stored the all complex data model or only the changed part? Thanks #1 2011-09-15 10:26 I have one Class Car that contains a ArrayList of Wheels. I have already one Car with 4 Wheels attached s ...

 
faq

How to install ObjectDB?

... by deleting the ObjectDB directory. ObjectDB does not modify the registry or any other system file. ...

 
forum_thread

Entity Management Config questions

Hi, the manual states the following regarding config of Entities: http://www.objectdb.com/java/jpa/setting/entities  : <cache ref="weak" level2="0mb" /> The <cache> element specifies settings of the two cache mechanisms for entities: #1 2010-12-20 07:36 Hi, the manual states the following regarding config of Entities: http://www.objectdb.com/java/jpa/setting/ent ...

 
api-jpa

orderBy(o)

Specify the ordering expressions that are used to order the query results.(Method of javax.persistence.criteria.CriteriaQuery)

 
api-jpa

distinct(distinct)

Specify whether duplicate query results will be eliminated.(Method of javax.persistence.criteria.Subquery)

 
api-jpa

groupBy(grouping)

Specify the expressions that are used to form groups over the query results.(Method of javax.persistence.criteria.AbstractQuery<T>)

 
api-jdo

setRange(fromIncl, toExcl)

Set the range of results to return.(Method of javax.jdo.Query)

 
api-jdo

isTransactional(pc)

Tests whether this object is transactional.(Method of javax.jdo.spi.StateManager)

 
api-jpa

having(restrictions)

Specify restrictions over the groups of the query according the conjunction of the specified restriction predicates.(Method of javax.persistence.criteria.AbstractQuery)

 
api-jdo

setIntField(pc, field, currentValue, newValue)

Mark the field as modified by the user.(Method of javax.jdo.spi.StateManager)