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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 ... , which returns exactly the same result objects ( Country instances): SELECT c FROM Country c JOIN FETCH c

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 javax.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 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 Return: the resulting fetch join Since: JPA 2.0

JPA Method in 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 Return: the resulting fetch join Throws

JPA Method in javax.persistence.criteria.FetchParent Fetch fetch (   String attributeName,     JoinType  jt ) Create a fetch join to the specified attribute using ... - 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 javax.persistence.OneToOne FetchType fetch default EAGER (Optional) Whether the association should be lazily loaded or must be eagerly fetched . The EAGER strategy is a requirement on the persistence provider runtime that the associated entity must be eagerly fetched

JPA Annotation Attribute in javax.persistence.OneToMany FetchType fetch default LAZY (Optional) Whether the association should be lazily loaded or must be eagerly fetched . The EAGER strategy is a requirement on the persistence provider runtime that the associated entities must be eagerly fetched

JPA Annotation Attribute in javax.persistence.ManyToMany FetchType fetch default LAZY (Optional) Whether the association should be lazily loaded or must be eagerly fetched . The EAGER strategy is a requirement on the persistence provider runtime that the associated entities must be eagerly fetched

JPA Annotation Attribute in javax.persistence.ManyToOne FetchType fetch default EAGER (Optional) Whether the association should be lazily loaded or must be eagerly fetched . The EAGER strategy is a requirement on the persistence provider runtime that the associated entity must be eagerly fetched

JPA Annotation Attribute in javax.persistence.Basic FetchType fetch default EAGER (Optional) Defines whether the value of the field or property should be lazily loaded or must be eagerly fetched ... 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 javax.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 javax.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 javax.persistence.criteria. Fetch FetchParent getParent () Return the parent of the fetched item. Return: fetch parent Since: JPA 2.0

JPA Annotation Attribute in javax.persistence.ElementCollection FetchType fetch default LAZY (Optional) Whether the collection should be lazily loaded or must be eagerly fetched . The EAGER strategy ... fetched . The LAZY strategy is a hint to the persistence provider runtime. 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

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

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

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

, join , fetch ). WHERE clause ( where ). GROUP BY / HAVING clauses ( groupBy , having , count , sum

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

Methods Fetch fetch ( PluralAttribute  attribute) Create a fetch join to the specified collection ... join Inherited from: FetchParent Since: JPA 2.0 Fetch fetch ( PluralAttribute  attribute,  JoinType  jt) Create a fetch join to the specified collection-valued attribute using

to its value at the beginning of the transaction. default- fetch -group (true | false) The default- fetch -group ... to the default fetch group, values for all the fields in the group are also loaded. The default fetch ... and references to user defined classes are excluded by default. The default- fetch -group attribute

JDO Static Field in javax.jdo.FetchPlan FETCH _SIZE_OPTIMAL For use with setFetchSize . Value: 0. Since: JDO 2.0

JDO Static Field in javax.jdo.FetchPlan FETCH _SIZE_GREEDY For use with setFetchSize . Value: -1. Since: JDO 2.0

is being loaded from the database, just after the default fetch group fields (see Chapter 4 ... objects, and even persistent fields in this loaded object that are not in the default fetch group ... the default fetch group should not be accessed by this method. void jdoPreDelete() Called

and DETACH_UNLOAD_FIELDS) and the active fetch groups determine the scope of fetching for the graph ... and DETACH_UNLOAD_FIELDS) and the active fetch groups determine the scope of fetching for the graph ... _UNLOAD_FIELDS) and the active fetch groups determine the scope of fetching for the graph of instances

JDO Interface FetchPlan Fetch groups are activated using methods on this interface. An instance ... Methods FetchPlan addGroup (String fetchGroupName) Add the fetch group to the set of active fetch groups. Return: the FetchPlan Since: JDO 2.0 FetchPlan clearGroups () Remove all active groups