About join

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JPA Doc
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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
JDO Doc
5

javax.jdo.Constants

_JOINED_TABLE_PER_CLASS "javax.jdo.option.mapping.JoinedTablePerClass" "javax.jdo.option.mapping ... _MAPPING_JOINED_TABLE_PER_CONCRETE_CLASS "javax.jdo.option.mapping.JoinedTablePerConcreteClass" "javax ... .supportedOptions() String OPTION_MAPPING_NON_JOINED_TABLE_PER_CONCRETE_CLASS "javax.jdo.option.mapping
JPA Doc
5

javax.persistence.InheritanceType

, Comparable Defines inheritance strategy options. Since: JPA 1.0 InheritanceType JOINED ... than the fields that are common to the parent class, and a join is performed to instantiate the subclass ... that are common to the parent class, and a join is performed to instantiate the subclass. Since: JPA
JPA Doc
5

joinCollection(attributeName)

Method javax.persistence.criteria.From CollectionJoin joinCollection(   String attributeName ) Create an inner join to the specified Collection-valued attribute. Parameters: attributeName - name of the attribute for the target of the join Returns: the resulting join Throws
JPA Doc
5

JoinColumn.referencedColumnName

table of the owning entity, or inverse entity if the join is part of the inverse join definition ... the collection. Default (only applies if single join column is being used): The same name as
JPA Doc
5

joinList(attributeName)

Method javax.persistence.criteria.From ListJoin joinList(   String attributeName ) Create an inner join to the specified List-valued attribute. Parameters: attributeName - name of the attribute for the target of the join Returns: the resulting join Throws: IllegalArgumentException - if attribute of the given name does not exist Since: JPA 2.0
JPA Doc
5

joinMap(attributeName)

Method javax.persistence.criteria.From MapJoin joinMap(   String attributeName ) Create an inner join to the specified Map-valued attribute. Parameters: attributeName - name of the attribute for the target of the join Returns: the resulting join Throws: IllegalArgumentException - if attribute of the given name does not exist Since: JPA 2.0
JPA Doc
5

joinSet(attributeName)

Method javax.persistence.criteria.From SetJoin joinSet(   String attributeName ) Create an inner join to the specified Set-valued attribute. Parameters: attributeName - name of the attribute for the target of the join Returns: the resulting join Throws: IllegalArgumentException - if attribute of the given name does not exist Since: JPA 2.0
JPA Doc
5

select(selection)

of the select item when it results from a get or join operation and the query result type is specified ... .createQuery(Product.class); q2.select(q2.from(Order.class) .join("items") . join("product