ObjectDB Database Search

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

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 ();   

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

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

All of my client threads are got hang after doing some fetch operations due to objectdb. Stack trace: java.net.SocketInputStream.socketRead0(Native Method) java.net.SocketInputStream.socketRead(SocketInputStream.java:116) java.net.SocketInputStream.read(SocketInputStream.java:171) java.net

Can you please tell me how to fetch all schema available in my database? Deepak_1996 Deepak Kumar Maharana You can use the JPA metamodel API . support Support

I have a class A, that contains a LinkedHashSet of  another class named B. When I try to fetch that hash set, it returns a null pointer. BUT, when I run the program in debug mode, it works fine!! So I'm almost sure it is a bug? Or maybe something I'm doing wrong? Here is a test class

, go the MyEntity class and remove "mapped-by". You obtain 1 second max of query fetch . So my performance

I create a new entity T newT and persistend it,then I create a query "select t from T t" to fetch all T entities.But  then the newT is not contain in the query result. Why? code order: query.setFlushMode(FlushModeType.AUTO); query.getResultList();   maozf maozf The following example

I have Entity named Fruits  with a column Type which is a enum. I want to fetch the based on Type  Eg.  Query qry= em.createQuery("Select f from Fruits f where f.Type =: t ");         qry.setParameter("t",Type.Sweet);   But it return

Getting this error when fetching records from mem db.

thread safe (as would a ConcurrentLinkedHashMap). FETCH thread nr (36) count: 982 UIDs in 26 msek FETCH thread nr (41) count: 982 UIDs in 29 msek FETCH thread nr (44) count: 982 UIDs in 14 msek FETCH thread nr (39) count: 982 UIDs in 25 msek FETCH thread nr (42) count: 982 UIDs in 31 msek FETCH

FetchType fetch (Optional) Whether the association 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

when defined using generics. Default: void/class Since: Jakarta Persistence (JPA) 1.0 FetchType fetch (Optional) Whether the collection 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

, this operation suppresses inclusion of an attribute mapped for eager fetching . The effect ... for eager fetching . The effect of this call may be overridden by subsequent invocations of Graph ... suppresses inclusion of attributes mapped for eager fetching . The effect of this call may be overridden by

for eager fetching . The effect of this call may be overridden by subsequent invocations of Graph ... suppresses inclusion of an attribute mapped for eager fetching . The effect of this call may be overridden ... is interpreted as a load graph, this operation suppresses inclusion of attributes mapped for eager fetching

default no operations are cascaded. Default: {} Since: Jakarta Persistence (JPA) 1.0 FetchType fetch (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

(JPA) 1.0 FetchType fetch (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 . The LAZY strategy is a hint to the persistence provider runtime

(cascade = CascadeType.ALL, fetch = FetchType.EAGER) private Person person; @Index private String phn; private String comments; /* Create Properties */ @ManyToOne( fetch = FetchType.LAZY) private WebUser ... .persistence.TemporalType.DATE) private Date createdOn; @ManyToOne( fetch = FetchType.LAZY) private

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

; @OneToMany( fetch =FetchType.LAZY) public List actions = new ArrayList (); @OneToMany( fetch =FetchType.LAZY) public List childNodes = new ArrayList (); @OneToMany( fetch =FetchType.LAZY) public List container = new ArrayList (); @OneToOne( fetch =FetchType.LAZY) public ObjectNode currentLocation; @OneToOne

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

id = 1;         @OneToMany( fetch =FetchType.EAGER)   

it defaults to CLOB ; for all other types it defaults to BLOB . Example 1: @Lob @Basic( fetch = LAZY) @Column(name = "REPORT") protected String report; Example 2: @Lob @Basic( fetch = LAZY) @Column(name

class with the given primary key, whose state may be lazily fetched . If the requested instance does ... of the given object, with the same primary key as the given object, whose state may be lazily fetched

Jakarta Persistence (JPA) Method in jakarta.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: Jakarta Persistence (JPA) 1.0

;  @OneToMany( fetch = FetchType.EAGER, cascade = CascadeType.ALL) public long[] time;     @OneToMany( fetch = FetchType.EAGER, cascade = CascadeType.ALL) private long[][] a1;     @OneToMany( fetch = FetchType.EAGER, cascade = CascadeType.ALL) private long[][] a2;  

has a OneToMany relationship to DataElement. Every relationship is eagerly fetched   Problem ... amount: Element.getCosts().get(0).getAmount() X   Could it be that despite being fetched eager ... ; etc... } @MappedSuperclass public abstract class BaseCostElement extends BaseElement { @ElementCollection ( fetch

fetched when an operation which retrieves an instance or instances of the root entity is executed

Jakarta Persistence (JPA) Method in jakarta.persistence.Graph void removeAttributeNode (    String attributeName ) Remove an attribute node from the entity graph. When this graph is interpreted as a load graph, this operation suppresses inclusion of an attribute mapped for eager fetching

Jakarta Persistence (JPA) Method in jakarta.persistence.Graph void removeAttributeNode (    Attribute attribute ) Remove an attribute node from the entity graph. When this graph is interpreted as a load graph, this operation suppresses inclusion of an attribute mapped for eager fetching

mapped for eager fetching . The effect of this call may be overridden by subsequent invocations of Graph

Jakarta Persistence (JPA) Enum Constant in jakarta.persistence.FetchType LAZY Data may be lazily fetched . Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Enum Constant in jakarta.persistence.FetchType EAGER Data must be eagerly fetched . Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta.persistence.EntityManager T getReference (    Class entityClass ,    Object primaryKey ) Obtain a reference to an instance of the given entity class with the given primary key, whose state may be lazily fetched . If the requested

Jakarta Persistence (JPA) Method in jakarta.persistence.EntityManager T getReference (    T entity ) Obtain a reference to an instance of the entity class of the given object, with the same primary key as the given object, whose state may be lazily fetched . The given object

() { return ownedElements; } private Element owner; @ManyToOne( fetch = FetchType.LAZY) @JoinTable(name ... might be the problem here. Try setting the fetch type of  ownedElements to EAGER and check ... (the default fetch type for to-many) - the entity objects are detached without that field

a boolean flag. @Entity class MyStepBlockCollection { @OneToMany ( cascase = ALL , fetch = Lazy ... = ALL , fetch = Lazy , target = MyStep } ArrayList steps; } @Entity { class MyStep { @ElementCollection ( fetch = LAZY ) ArrayList values; } @Embeddable class MyValue { @Basic boolean flag; @Basic String