About INNER JOIN

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fetch(attribute)

Method javax.persistence.criteria.FetchParent Fetch fetch(   SingularAttribute attribute ) Create a fetch join to the specified single-valued attribute using an inner join. Parameters: attribute - target of the join Returns: the resulting fetch join Since: JPA 2.0
JPA Doc
8

fetch(attributeName)

Method javax.persistence.criteria.FetchParent Fetch fetch(   String attributeName ) Create a fetch join to the specified attribute using an inner join. Parameters: attributeName - name of the attribute for the target of the join Returns: the resulting fetch join Throws
JPA Doc
7

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
7

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
7

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
7

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
7

Criteria Query From Elements

(bound by an entity class) are represented by the Root subinterface: Join variables (bound by an attribute of a preceding variable in the FROM clause) are represented by the Join subinterface and its descendant interfaces: See the FROM in Criteria Queries section for more details and examples. Join
Forum
7

JPQL JOIN FETCH Error

Hello I get an error when executing the following JPQL query: select doi from Doi doi left join fetch doi.metadata metadata left join fetch metadata.titles titles left join fetch metadata.creators creators left join fetch metadata.descriptions descriptions left join fetch metadata
JPA Doc
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javax.persistence.criteria.Subquery

root Since: JPA 2.0 Join correlate( Join parentJoin) Create a subquery join object correlated to a join object of the enclosing query. Create a subquery join object correlated to a join object of the enclosing query. Parameters: parentJoin - join object of the containing query Returns
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6

Left join fetch behaviour doesn't retrieve children?

Hello, I'm a little bit confused about a left join fetch behaviour. In this test case, i try to fetch my 3 children using a left join fetch. But my collection is null after closing the em ... left join fetch         em = emf.createEntityManager();         TypedQuery query