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JPA Doc
2

OneToOne.optional

Annotation Element javax.persistence.OneToOne boolean optional (Optional) Whether the association is optional. If set to false then a non-null relationship must always exist. Default value: true Since: JPA 1.0
JPA Doc
2

OneToOne.orphanRemoval

Annotation Element javax.persistence.OneToOne boolean orphanRemoval (Optional) Whether to apply the remove operation to entities that have been removed from the relationship and to cascade the remove operation to those entities. Default value: false Since: JPA 2.0
JPA Doc
2

or(restrictions)

Method javax.persistence.criteria.CriteriaBuilder Predicate or(   Predicate... restrictions ) Create a disjunction of the given restriction predicates. A disjunction of zero predicates is false. Parameters: restrictions - zero or more restriction predicates Returns: or predicate Since: JPA 2.0
Forum
2

Performance tuning, best practices

path="$objectdb/log/" max="8mb" stdout=" false" stderr=" false" />        
JDO Doc
2

retrieve(pc, useFetchPlan)

is false, this method behaves exactly as the corresponding method without the useFetchPlan parameter
JDO Doc
2

retrieveAll(pcs, useFetchPlan)

than the current fetch group. If the useFetchPlan parameter is false, this method behaves exactly as
JDO Doc
2

retrieveAll(pcs, useFetchPlan)

fetch group. If the useFetchPlan parameter is false, this method behaves exactly as
JDO Doc
2

retrieveAll(useFetchPlan, pcs)

fetch group. If the useFetchPlan parameter is false, this method behaves exactly as
JPA Doc
2

rollback()

Method javax.persistence.EntityTransaction void rollback() Roll back the current resource transaction. Throws: IllegalStateException - if isActive() is false PersistenceException - if an unexpected error condition is encountered Since: JPA 1.0
JDO Doc
2

setCopyOnAttach(flag)

Method javax.jdo.PersistenceManager void setCopyOnAttach(   boolean flag ) Sets the copyOnAttach setting. CopyOnAttach set to true specifies that during makePersistent, copies are made of detached parameter instances. With this flag set to false, detached parameter instances are attached directly