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, a full iteration over the Cartesian product is avoided. [INNER] JOIN As discussed above, range ... an additional type of identification variable, a join variable, which represent a more limited iteration over specified collections of objects. The following query uses one range variable and one join

JPA Interface Join Type Parameters: - the source type of the join - the target type of the join Super Interfaces: Expression , FetchParent , From , Path A join to an entity, embeddable, or basic type. Since: JPA 2.0 The FROM clause (JPQL / Criteria API) article explains how to use Join . Public

How write a query in JPA2 with LEFT JOIN on INNER JOIN ? select a.description, a.id, p1.description, p2.description,p3.description from action a left join action_profile ap1 on ap1.id_action=a.id inner join profile p1 on ap1.id_profile=p1.id and p1.name='?' left join action_profile ap2 on ap2.id

the equivalent JOIN query. Entity Type Expressions The TYPE operator (which is new in JPA 2) returns the type ... its subinterfaces ( From , Root , Join and Join 's descendants). Path Expressions The Root and Join interfaces ... Variable Paths: Root country = query. from (Country.class); Join neighborCountry = country. join

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.publishers

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 ... ();         // Try to retrieve parent and children using left join fetch

First of all, thank you for promptly implementing JOIN FETCH over nested paths in response ... , but I attempt to LEFT JOIN FETCH all the members of a collection within a (non-existent) member ... works (returns my instance of C): SELECT c FROM C c LEFT JOIN FETCH c.bList WHERE id=:id; But if I

JPA Method in jakarta.persistence.criteria.From Join join (    SingularAttribute  attribute,     JoinType  jt ) Create a join to the specified single-valued attribute using the given join type. Parameters: attribute - target of the join jt - join type Return: the resulting join Since: JPA 2.0

JPA Method in jakarta.persistence.criteria.CriteriaBuilder Join treat (    Join   join ,    Class  type ) Downcast Join object to the specified type. Parameters: join - Join object type - type to be downcast to Return: Join object of the specified type Since: JPA 2.1

JPA Method in jakarta.persistence.criteria.From Join join (   String attributeName,     JoinType  jt ) Create a 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

JPA Method in jakarta.persistence.criteria.From Join join (    EntityType  entity,     JoinType  joinType ) Create and add a join to the given entity. Parameters: entity - metamodel entity representing the join target joinType - join type Return: the resulting join Since: JPA 3.2

JPA Method in jakarta.persistence.criteria.From MapJoin join (    MapAttribute  map,     JoinType  jt ) Create a join to the specified Map-valued attribute using the given join type. Parameters: map - target of the join jt - join type Return: the resulting join Since: JPA 2.0

JPA Method in jakarta.persistence.criteria.From SetJoin join (    SetAttribute  set,     JoinType  jt ) Create a join to the specified Set-valued attribute using the given join type. Parameters: set - target of the join jt - join type Return: the resulting join Since: JPA 2.0

JPA Method in jakarta.persistence.criteria.From ListJoin join (    ListAttribute  list,     JoinType  jt ) Create a join to the specified List-valued attribute using the given join type. Parameters: list - target of the join jt - join type Return: the resulting join Since: JPA 2.0

JPA Method in jakarta.persistence.criteria.From CollectionJoin join (    CollectionAttribute  collection,     JoinType  jt ) Create a join to the specified Collection-valued attribute using the given join type. Parameters: collection - target of the join jt - join type Return: the resulting join Since: JPA 2.0

JPA Method in jakarta.persistence.criteria.From Join join (    SingularAttribute  attribute ) Create an inner join to the specified single-valued attribute. Parameters: attribute - target of the join Return: the resulting join Since: JPA 2.0

JPA Method in jakarta.persistence.criteria.From Join join (   Class  entityClass,     JoinType  joinType ) Create and add a join to the given entity. Parameters: entityClass - the target entity class joinType - join type Return: the resulting join Since: JPA 3.2

JPA Method in jakarta.persistence.criteria.From Join join (    EntityType  entity ) Create and add an inner join to the given entity. Parameters: entity - metamodel entity representing the join target Return: the resulting join Since: JPA 3.2

JPA Method in jakarta.persistence.criteria. Join Join on (   Predicate... restrictions ) Modify the join to restrict the result according to the specified ON condition and return the join object. Replaces the previous ON condition, if any. Parameters: restrictions - zero or

JPA Method in jakarta.persistence.criteria. Join Join on (    Expression  restriction ) Modify the join to restrict the result according to the specified ON condition and return the join object. Replaces the previous ON condition, if any. Parameters: restriction - a simple or

JPA Method in jakarta.persistence.criteria.From Join join (   String attributeName ) Create an inner join to the specified attribute. Parameters: attributeName - name of the attribute for the target of the join Return: the resulting join Throws: IllegalArgumentException - if attribute of the given name does not exist Since: JPA 2.0

JPA Method in jakarta.persistence.criteria.From SetJoin join (    SetAttribute  set ) Create an inner join to the specified Set-valued attribute. Parameters: set - target of the join Return: the resulting join Since: JPA 2.0

JPA Method in jakarta.persistence.criteria.From CollectionJoin join (    CollectionAttribute  collection ) Create an inner join to the specified Collection-valued attribute. Parameters: collection - target of the join Return: the resulting join Since: JPA 2.0

JPA Method in jakarta.persistence.criteria.From Join join (   Class  entityClass ) Create and add an inner join to the given entity. Parameters: entityClass - the target entity class Return: the resulting join Since: JPA 3.2

JPA Method in jakarta.persistence.criteria.From ListJoin join (    ListAttribute  list ) Create an inner join to the specified List-valued attribute. Parameters: list - target of the join Return: the resulting join Since: JPA 2.0

JPA Method in jakarta.persistence.criteria.From MapJoin join (    MapAttribute  map ) Create an inner join to the specified Map-valued attribute. Parameters: map - target of the join Return: the resulting join Since: JPA 2.0

JPA Method in jakarta.persistence.criteria. Join Attribute getAttribute () Return the metamodel attribute representing the join target, if any, or null if the target of the join is an entity type. Return: metamodel attribute or null Since: JPA 2.0

JPA Method in jakarta.persistence.criteria. Join From getParent () Return the parent of the join . Return: join parent Since: JPA 2.0

JPA Method in jakarta.persistence.criteria. Join JoinType getJoinType () Return the join type. Return: join type Since: JPA 2.0

JPA Method in jakarta.persistence.criteria.CriteriaBuilder MapJoin treat (    MapJoin   join ,    Class  type ) Downcast MapJoin object to the specified type. Parameters: join - MapJoin object type - type to be downcast to Return: MapJoin object of the specified type Since: JPA 2.1

JPA Method in jakarta.persistence.criteria.CriteriaBuilder ListJoin treat (    ListJoin   join ,    Class  type ) Downcast ListJoin object to the specified type. Parameters: join - ListJoin object type - type to be downcast to Return: ListJoin object of the specified type Since: JPA 2.1

JPA Method in jakarta.persistence.criteria. Join Predicate getOn () Return the predicate that corresponds to the ON restriction(s) on the join , or null if no ON condition has been specified. Return: the ON restriction predicate Since: JPA 2.1

JPA Method in jakarta.persistence.criteria.CriteriaBuilder SetJoin treat (    SetJoin   join ,    Class  type ) Downcast SetJoin object to the specified type. Parameters: join - SetJoin object type - type to be downcast to Return: SetJoin object of the specified type Since: JPA 2.1

JPA Method in jakarta.persistence.criteria.CriteriaBuilder CollectionJoin treat (    CollectionJoin   join ,    Class  type ) Downcast CollectionJoin object to the specified type. Parameters: join - CollectionJoin object type - type to be downcast to Return: CollectionJoin object of the specified type Since: JPA 2.1

JPA Enum Constant in jakarta.persistence.InheritanceType JOINED A table for each abstract or concrete entity class, with only the columns mapped to persistent fields and properties declared by ... across multiple table rows. A join is used to retrieve the state of such entities. Since: JPA 1.0

( composite ) indices. Collection and array elements are indexable (extremely fast JOIN queries ... optimizations. Configurable JPA eager/lazy fetch  and JPA query FETCH JOIN . Configurable JDO fetch ... , max) - for paging. Query Structure SELECT (including NEW ). FROM (including INNER JOIN , LEFT OUTER

variables (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 examples. Join Fetch Elements Join Fetch is managed in criteria queries by the following interfaces

for Join s of associations, embeddables, and collections belonging to the type, and for Path s ... ) Create a fetch join to the specified collection-valued attribute using an inner join . Parameters: attribute - target of the join Return: the resulting join Inherited from: FetchParent Since: JPA 2.0

in the results directly, but their content can be added to the SELECT clause by using a bound JOIN

, multiselect , array , tuple , construct ). Criteria FROM  ( from , join , fetch ). Criteria WHERE  

elements (representing range variables, join and fetch): Other criteria query expressions (for all the query clauses):

to the structure of SELECT queries. DELETE queries cannot include multiple variables and JOIN

that ability and require multiple tables, multiple records and join operations in order to support

: SELECT c, l FROM Country c JOIN c.languages l WHERE c.population :p AND l in :languages The FROM clause

variable (with or without an explicit variable name) for iteration. Multiple variables and JOIN are not

;backupThread. join (); // Wait until the backup is completed.     

, multiselect , array , tuple , construct ). FROM clause ( from , join , fetch ). WHERE clause

Super Interfaces: FetchParent Represents a join -fetched association or attribute. Since: JPA 2.0 Public Methods Fetch fetch ( PluralAttribute  attribute) Create a fetch join to the specified collection-valued attribute using an inner join . Parameters: attribute - target of the join Return

Fetch fetch ( PluralAttribute  attribute) Create a fetch join to the specified collection-valued attribute using an inner join . Parameters: attribute - target of the join Return: the resulting join ... a fetch join to the specified collection-valued attribute using the given join type. Parameters: attribute

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