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variant returns Nauru with a NULL value as its capital. [LEFT [OUTER] | INNER] JOIN FETCH JPA support of transparent navigation and fetch  makes it very easy to use, since it provides the illusion ... exactly the same result objects ( Country instances): SELECT c FROM Country c JOIN FETCH c.capital

Eager Fetch Retrieval of an entity object from the database might cause automatic retrieval ... retrieval by using a lazy fetch type: @Entity class Employee { : @ManyToOne ( fetch = FetchType . LAZY ... with the FetchType.LAZY fetch policy is initialized to reference a new managed hollow object (unless the referenced

of eager fetch in JPQL as follows: SELECT c FROM C JOIN FETCH c.bList WHERE c.id=:id But when I attempt to take it to the 2nd level: SELECT c FROM C JOIN FETCH c.bList JOIN FETCH c.bList.aList WHERE c.id=:id I get an error along the lines of: Invalid fetch path: bList.aList for type C (#element

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 publishers left join fetch metadata.contributors contributors left join fetch metadata.dates dates left

JPA Interface Fetch Type Parameters: - the source type of the fetch - the target type of the fetch 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

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. It was expected to be fetched before closing the em, no ? In fact, that is the objective of the fetch purpose

Hello, I'm doing some tests to choose the best collection fetch strategy. I have entities ... this article,join fetch seems to be the right choice. What about ObjectDb ? The implementation is totally different. Is an "All eager strategy" more efficient that many join fetch ( cartesian product + distinct

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

of using JOIN FETCH to avoid excessive round trips to the database: SELECT c FROM Country c JOIN FETCH c ... , then I get the correct addresses (obviously fetched lazily), but still 2 results.  What should I be doing to get what I want out of this query? Note that I need to get the fetch mode specified in

I have a class where two fields are annotated with  @Basic( fetch = FetchType.LAZY ... (swing app). Yet they don't seem to be fetched lazily. This class should hopefully demonstrate the problem: import javax.persistence.*; @Entity public class Sample { private String title; @Basic( fetch

declare explicitly the fetch strategy for "children" as FetchType.Eager, then how can I retrieve the Nodes ... ;colletions are to be lazy fetched . You can try this in a query.  "select n from Node n left outer join fetch n.children where ....." this will also fetch your collection. Basically you can use

jpqlResult = em.createQuery( "SELECT d FROM Demand d JOIN FETCH d.services WHERE d=:demand ... and fetch its services. Demand object is identified and found correctly, but as it is associated ... should return only one result, with fetched service sub-elements, shouldn't it? I am almost sure (but I

Hi, I have a question about detaching objects after issuing query with JOIN FETCH . Let's say I have two classes: public class A { @ManyToOne B bClass } public class B { @OneToMany( fetch = FetchType.LAZY, cascade = CascadeType.ALL) List aClasses; } Now, I want to fetch all B classes

JPA Method in jakarta.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 Return: the resulting fetch join Since: JPA 2.0

JPA Method in jakarta.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 Return: the resulting fetch join Since: JPA 2.0

JPA Method in jakarta.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 Return: the resulting fetch join Throws

JPA Method in jakarta.persistence.criteria.FetchParent Fetch fetch (   String attributeName,     JoinType  jt ) Create a fetch join to the specified attribute ... jt - join type Return: the resulting fetch join Throws: IllegalArgumentException - if attribute of the given name does not exist Since: JPA 2.0

Hi, I came across a weird behavior when using  fetch =FetchType.LAZY in a complex code ... am using in object declaration @OneToMany( fetch =FetchType.EAGER, cascade = CascadeType.ALL) private LinkedList referencedObj; My test suite is running well. 2. However when I change fetch to LAZY

Hello. @OneToMany( fetch = FetchType.LAZY) doesn't work when using EJB or something else related ... , generator = "b") private int id; @OneToMany( fetch = FetchType.LAZY, cascade = CascadeType ... Parent { // ...id @OneToOne( fetch = FetchType.LAZY, cascade = CascadeType.ALL) private ByteData bydaData

map types is not stable, we lost them sometimes after JVM restarted. Eager fetch is properly set ... and fetch is: @Entity public class Game {     .......     @ElementCollection( fetch =FetchType.EAGER)     private List members = new ArrayList ();   

JPA Annotation Attribute in jakarta.persistence.OneToOne FetchType fetch default FetchType.EAGER (Optional) Whether the association should be lazily loaded or must be eagerly fetched . The EAGER ... fetched . The LAZY strategy is a hint to the persistence provider runtime. If not specified, defaults to EAGER . Since: JPA 1.0

JPA Annotation Attribute in jakarta.persistence.OneToMany FetchType fetch default FetchType.LAZY (Optional) Whether the association should be lazily loaded or must be eagerly fetched . The EAGER ... must be eagerly fetched . The LAZY strategy is a hint to the persistence provider runtime. Since: JPA 1.0

JPA Annotation Attribute in jakarta.persistence.ManyToMany FetchType fetch default FetchType.LAZY (Optional) Whether the association should be lazily loaded or must be eagerly fetched . The EAGER ... must be eagerly fetched . The LAZY strategy is a hint to the persistence provider runtime. If not specified, defaults to LAZY . Since: JPA 1.0

JPA Annotation Attribute in jakarta.persistence.ManyToOne FetchType fetch default FetchType.EAGER (Optional) Whether the association should be lazily loaded or must be eagerly fetched . The EAGER ... must be eagerly fetched . The LAZY strategy is a hint to the persistence provider runtime. If not specified, defaults to EAGER . Since: JPA 1.0

JPA Annotation Attribute in jakarta.persistence.Basic FetchType fetch default FetchType.EAGER (Optional) Whether the value of the field or property should be lazily loaded or must be eagerly fetched ... must be eagerly fetched . The LAZY strategy is a hint to the persistence provider runtime. If not specified, defaults to EAGER . Since: JPA 1.0

JPA Method in jakarta.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 Return: the resulting join Since: JPA 2.0

JPA Method in jakarta.persistence.criteria.FetchParent 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 Since: JPA 2.0

JPA Method in jakarta.persistence.criteria. Fetch FetchParent getParent () Return the parent of the fetched item. Return: fetch parent Since: JPA 2.0

JPA Annotation Attribute in jakarta.persistence.ElementCollection FetchType fetch default FetchType.LAZY (Optional) Whether the collection should be lazily loaded or must be eagerly fetched ... must be eagerly fetched . The LAZY strategy is a hint to the persistence provider runtime. If not specified, defaults to LAZY . Since: JPA 2.0

fetch policy, I know the local way to do it (@ManyToOne( fetch =FetchType.LAZY)). Is there any way ... per relationship, and for some extent also per query (using JOIN FETCH ). support Support

am noticing in 2.4.7 that ' fetch ' cannot be added to objectdb.conf so, wondering how to enable 'eager' fetching of collections ?   Dave   dmoshal David Moshal The question is unclear. Is it something new or different in version 2.4.7? Eager fetching has always been set by annotations or

- fetch ", "LAZY");) on the query execution it works. I assume it has to do with the @Transactional ... hints? The Mapping of class Modell and its member: @Entity class Modell { ... @OneToMany( fetch ... .result- fetch ", "LAZY");     List entities = query.getResultList(); } Stack Trace

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

JPA Method in jakarta.persistence.criteria. Fetch Attribute getAttribute () Return the metamodel attribute corresponding to the fetch join. Return: metamodel attribute for the join Since: JPA 2.0

Given that the default seems to be FetchType.LAZY for all collections @OneToMany and @ManyToMany. Such as a configuration option. Instead of having to explicitly set fetch in annotation code in ... as the fetch type of all relationships may cause loading the entire database into memory

the fetch join? If so should I do to all fields of List , ie OneToMany or should also be done for joins ? Grateful. This may be occurring due to not doing the fetch join? If so should I

Hello. I have a class Thing that contains OneToMany list of classes Photo. Photo contains  @Lob @Basic( fetch = FetchType.LAZY) private byte[] content; And after some queries with Thing ... of the photos despite of using  fetch = FetchType.LAZY. How can I fix this memory issue? Vladiator

The following annotations are used to define JDO fetch groups and fetch plans:

optimizations. Configurable JPA eager/lazy fetch  and JPA query FETCH JOIN . Configurable JDO fetch ... JOIN and JOIN FETCH ). WHERE (with both JPQL and JDOQL expressions). GROUP BY (including HAVING

; @OneToMany ( fetch = FetchType . EAGER ) List field3; } The entity class declaration ... to be thrown on any attempt to store an entity with a null value in that field. Cascade and fetch settings

. "objectdb.result- fetch " - sets fetch mode for query result as either "EAGER" (the default) or "LAZY

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

, 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):

annotation enables configuring cascade and fetch policy, using the following enum types: Additional

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

an element of the from clause which may function as the parent of Fetches . Since: JPA 2.0 Public Methods Fetch fetch ( PluralAttribute  attribute) Create a fetch join to the specified collection-valued ... Since: JPA 2.0 Fetch fetch ( PluralAttribute  attribute,  JoinType  jt) Create

of attributes belonging to the type. 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 ... Fetch fetch ( PluralAttribute  attribute,  JoinType  jt) Create a fetch join

 eager fetch . JOIN FETCH queries . JDO fetch groups . support Support Hello

As demonstrated in this forum thread , a mapped by collection field with lazy fetch mode is not initialized in results of a query that uses JOIN FETCH on that collection field (when enhancement is used). support Support   Build 2.4.1_06 fixes this issue (fields are now initialized