About join

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JPA Doc
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javax.persistence.MapKeyJoinColumns

2.0 See Also: MapKeyJoinColumn MapKeyJoinColumn[] value (Required) The map key join columns that are used to map to the entity that is the map key. (Required) The map key join columns that are used
JPA Doc
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MapKeyColumn.name

is for a ManyToMany entity relationship or for a OneToMany entity relationship using a join table, the map key column is in a join table. If the map key is for a OneToMany entity relationship using a foreign key
JPA Doc
5

MapKeyColumn.table

using a join table, the name of the join table for the map. If the map key is for a OneToMany entity
JPA Doc
5

PessimisticLockScope.EXTENDED

in join tables will be locked if the javax.persistence.lock.scope property is specified ... collection generally locks only the rows in the join table or collection table for that relationship or
JPA Doc
5

PessimisticLockScope.NORMAL

to the non-collection-valued persistent state of that instance. If a joined inheritance strategy ... contain the foreign key (such as relationships that are mapped to join tables or unidirectional
JPA Doc
5

PrimaryKeyJoinColumn.referencedColumnName

Annotation Element javax.persistence.PrimaryKeyJoinColumn String referencedColumnName (Optional) The name of the primary key column of the table being joined to. Defaults to the same name as the primary key column of the primary table of the superclass (JOINED mapping strategy); the same name as
JPA Doc
5

AssociationOverride.joinColumns

Annotation Element javax.persistence.AssociationOverride JoinColumn[] joinColumns The join column(s) being mapped to the persistent attribute(s). The joinColumns elements must be specified ... must not be specified if a join table is used in the overriding of the mapping of the relationship. Default value: {} Since: JPA 1.0
JPA Doc
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AssociationOverride.joinTable

Annotation Element javax.persistence.AssociationOverride JoinTable joinTable The join table that maps the relationship. The joinTable element must be specified if a join table is used in the overriding of the mapping of the relationship. The joinTable element must not be specified if a foreign key
JDO Doc
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Value.serialized

Annotation Element javax.jdo.annotations.Value String serialized Whether the value is to be stored serialized (into a single column of a join table). Returns: Whether the value is to be stored serialized (into a join table) Default value: "" Since: JDO 2.1
JPA Doc
5

javax.persistence.ManyToMany

, the owning side and the non-owning, or inverse, side. The join table is specified on the owning ... annotation to specify the relationship field or property of the owning side. The join table