 3 | of the foreign key column for the map key. The table in which it is found depends upon the context. If the join ... for the map value. If the join is for a map key for a ManyToMany entity relationship or for a OneToMany entity relationship using a join table, the foreign key column is in a join table. If the join |
3 | to something such as:
SELECT e FROM MyEntity e JOIN e.owner o
WHERE o IS NULL OR o.id = :userId Notice that the navigation root.get("owner").get("id") is implemented as INNER JOIN. This is a requirement of the JPA specification, which is known to cause some confusion. You have to use LEFT OUTER JOIN explicitly to cover entities with a null owner. bhamilton |
3 | Method javax.persistence.criteria.FetchParent Fetch fetch( PluralAttribute attribute, JoinType jt ) Create a fetch join to the specified collection-valued attribute using the given join type. Parameters: attribute - target of the join jt - join type Returns: the resulting join Since: JPA 2.0 |
3 | Method javax.persistence.criteria.FetchParent Fetch fetch( SingularAttribute attribute, JoinType jt ) Create a fetch join to the specified single-valued attribute using the given join type. Parameters: attribute - target of the join jt - join type Returns: the resulting fetch join Since: JPA 2.0 |
3 | jt ) Create a fetch join to the specified attribute using the given join type. Parameters: attributeName - name of the attribute for the target of the join jt - join type Returns: the resulting fetch join Throws: IllegalArgumentException - if attribute of the given name does not exist Since: JPA 2.0 |
3 | that are contained in join tables will be locked if the javax.persistence.lock.scope property is specified ... , element collections and relationships owned by the entity that are contained in join tables ... only the rows in the join table or collection table for that relationship or collection. This means |
3 | , JoinType jt ) Create a join to the specified Collection-valued attribute using the given join type. Parameters: attributeName - name of the attribute for the target of the join jt - join type Returns: the resulting join Throws: IllegalArgumentException - if attribute of the given name does not exist Since: JPA 2.0 |
3 | jt ) Create a join to the specified List-valued attribute using the given join type. Parameters: attributeName - name of the attribute for the target of the join jt - join type Returns: the resulting join Throws: IllegalArgumentException - if attribute of the given name does not exist Since: JPA 2.0 |
3 | jt ) Create a join to the specified Map-valued attribute using the given join type. Parameters: attributeName - name of the attribute for the target of the join jt - join type Returns: the resulting join Throws: IllegalArgumentException - if attribute of the given name does not exist Since: JPA 2.0 |
3 | Method javax.persistence.criteria.From SetJoin joinSet( String attributeName, JoinType jt ) Create a join to the specified Set-valued attribute using the given join type. Parameters: attributeName - name of the attribute for the target of the join jt - join type Returns: the resulting join |