About join

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JPA Doc
5

getCorrelatedJoins()

Method javax.persistence.criteria.Subquery Set<Join> getCorrelatedJoins() Return the correlated joins of the subquery. Returns empty set if the subquery has no correlated joins. Modifications to the set do not affect the query. Returns: the correlated joins of the subquery Since: JPA 2.0
JPA Doc
5

getJoins()

Method javax.persistence.criteria.From Set<Join> getJoins() Return the joins that have been made from this bound type. Returns empty set if no joins have been made from this bound type. Modifications to the set do not affect the query. Returns: joins made from this type Since: JPA 2.0
JDO Doc
5

javax.jdo.annotations.Key

columns associated with this join. Generate or assume a foreign key constraint exists on the column or columns associated with this join. Specify "true" or "false". Returns: whether to generate or assume ... serialized (into a single column of a join table). Whether the key is to be stored serialized (into
JPA Doc
5

javax.persistence.CollectionTable

@CollectionTable(name="HOMES") // use default join column name @AttributeOverrides ... only applies if a single join column is used. The default is the same as for JoinColumn (i.e ... column.) However, if there is more than one join column, a JoinColumn annotation must be specified
JPA Doc
5

javax.persistence.MapKeyColumn

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

javax.persistence.SecondaryTable

. If no primary key join columns are specified, the join columns are assumed to reference the primary key columns ... that are used to join with the primary table. (Optional) The columns that are used to join
Forum
5

Query execution time issue

Entity e inner join e.person person inner join person.address address left join address.place addressPlace left join address.city addressCity left join address.county addressCounty left join person.birthPlace birthPlace left join person.birthCounty birthCounty left join person
JPA Doc
5

CollectionTable.joinColumns

only applies if a single join column is used. The default is the same as for JoinColumn (i.e ... column.) However, if there is more than one join column, a JoinColumn annotation must be specified for each join column using the JoinColumns annotation. In this case, both the name
JPA Doc
5

getFetches()

Method javax.persistence.criteria.FetchParent Set> getFetches() Return the fetch joins that have been made from this type. Returns empty set if no fetch joins have been made from this type. Modifications to the set do not affect the query. Returns: fetch joins made from this type Since: JPA 2.0
JPA Doc
5

getJoinType()

Method javax.persistence.criteria.Fetch JoinType getJoinType() Return the join type used in the fetch join. Returns: join type Since: JPA 2.0