ObjectDB Database Search

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

(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

; @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

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

;  @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

. (Especially if using LAZY fetch sub object). Do I always just get the list of objects as it looks when the fetch start? Martin   mt Martin Every EntityManager manages its own memory objects ... own defined as @OneToMany( fetch =FetchType.LAZY) List bookList; (And in this example, there is only 1 object in

Defines strategies for fetching data from the database. The EAGER strategy is a requirement on the persistence provider runtime that data must be eagerly fetched . The LAZY strategy is a hint to the persistence provider runtime that data should be fetched lazily when it is first accessed

, and particularly how exactly that map is defined and with which fetch type. If the problem ... ; @OneToMany(cascade=CascadeType.PERSIST, fetch =FetchType.EAGER)         ... ;    fetch =FetchType.EAGER, orphanRemoval=true)       

T fetch (Company company, Long primaryKey) {   mLogger.info(" Fetching type: {} with id ... ;@Override public T fetch (Company company, Long primaryKey) {   mLogger.info(" Fetching type ... T fetch (Company company, Long primaryKey) {   mLogger.info(" Fetching type: {} with id

). The problem is probably with the extensive EAGER setting in Product , and particularly with eager fetch of inverse (mapped by) collections. Massive inverse fetch is currently inefficient and has to be improved ... ( setMaxResults ). Does that number affect? You may try running the query with a lazy fetch hint (as done by

public class TransportationEvent { ... @ManyToMany( fetch = FetchType.EAGER, cascade = CascadeType ... { .... @ManyToMany( fetch = FetchType.LAZY, cascade = CascadeType.PERSIST) private List transportationEvents ... .annotations.CascadeType.DELETE_ORPHAN) and i applied that as @ManyToMany( fetch = FetchType.EAGER, cascade

) @ElementCollection private Map values = new HashMap (); @OneToOne ( fetch = FetchType.LAZY, cascade ... ; @OneToOne ( fetch = FetchType.EAGER) private TCStep step; //For performance reasons, we use a list ... @ElementCollection ( fetch = FetchType.EAGER) private Map values = new HashMap (); } btc_es BTC

and 2.4.3_01 the db is always returning everything, including the data marked as Fetch .LAZY.  I ... an open EntityManager, but it is fetched lazily when needed. You do see a difference (in addition ... data will not be available and will not be fetched either. support Support Ok, so then I believe Lazy

.FIELD) @Column (name = "uid") private String uid; @OneToOne ( fetch = FetchType.EAGER, cascade = {CascadeType.REFRESH, CascadeType.DETACH }) private ModelElementImpl element; @OneToMany ( fetch ... fetch that affects the performance of further operations. Could you please check build 2.8.6_06

annotating the map with @OneToMany( fetch =FetchType.EAGER). Outside the DAO method only fields ... signingDate;     @OneToMany( fetch =FetchType.EAGER, cascade=CascadeType ... class GuestHolder { // Persistent Fields: @Id @GeneratedValue Long id; @OneToMany( fetch =FetchType

is faster at runtime. It could be due to the different default fetch value ( LAZY for ElementCollection , EAGER for Basic ). You may try using an @ElementCollection( fetch =FetchType.EAGER) and see if it is fast as @Basic support Support I tested it already with @ElementCollection( fetch =FetchType

. fetch (ResultSet.java:189) at org.eclipse.birt.data.engine.executor.cache.OdiAdapter. fetch (OdiAdapter.java:214) at org.eclipse.birt.data.engine.executor.cache.RowResultSet. fetch (RowResultSet.java:145 ... .engine.executor.transform.SimpleResultSet$RowResultSetWithResultSetScope. fetch (SimpleResultSet.java

FetchType fetch default FetchType.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 entity must be eagerly fetched . The LAZY strategy is a hint to the persistence

FetchType fetch default FetchType.LAZY (Optional) Whether the collection 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 . The LAZY strategy is a hint to the persistence provider

of the association. By default no operations are cascaded. Since: JPA 1.0 FetchType fetch default FetchType.EAGER (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

to the map value. Since: JPA 1.0 FetchType fetch default FetchType.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 . The LAZY strategy

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

of the association. By default no operations are cascaded. Since: JPA 1.0 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

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

Public Annotation Attributes FetchType fetch default FetchType.EAGER (Optional) Whether the value of the field or property 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 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. Return: fetch joins made from this type Since: JPA 2.0

for eager fetching . The effect of this call may be overridden by subsequent invocations ... fetching . The effect of this call may be overridden by subsequent invocations of addAttributeNode or ... inclusion of attributes mapped for eager fetching . The effect of this call may be overridden by

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

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 . The effect

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 . The effect

for eager fetching . The effect of this call may be overridden by subsequent invocations of addAttributeNode or addSubgraph . Since: JPA 3.2

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 may be persistent or detached

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

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

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 instance does

JPA Annotation NamedEntityGraph Target: TYPE Implemented Interfaces: Annotation Defines a named plain. This annotation must be applied to the root entity of the graph, and specifies the limits of the graph of associated attributes and entities fetched when an operation which retrieves an instance

() { 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

;       @OneToMany(cascade= CascadeType.ALL, fetch = FetchType.EAGER ... ;    @OneToOne( fetch = FetchType.LAZY, cascade = CascadeType.ALL)     ... ;       @ManyToOne( fetch = FetchType.LAZY)      

-Query and fetching Entities afterwards from database. Expected result: Getting changed Entities from ... using UPDATE-Query, calling entityManger.clear() and fetching Entities afterwards from database ... using UPDATE-Query and fetching Entities afterwards from database. Expected result: Getting changed

JDO. It works like this. First you specify attributes to fetch from database: @FetchGroup(name ... query = em.createQuery("SELECT e FROM Entity e", Entity.class); query.setHint(QueryHints. FETCH _GROUP ... ("select e.firstName, e.lastName FROM Entity e", Tuple.class); But with fetch group you don't

= "uid") private String uid; @OneToOne ( fetch = FetchType.EAGER, cascade = {CascadeType.REFRESH, CascadeType.DETACH }) private ModelElementImpl element; @OneToMany ( fetch = FetchType.EAGER, cascade ... uid; @OneToOne ( fetch = FetchType.EAGER, cascade = {CascadeType.REFRESH, CascadeType.DETACH }) private