fetch « Fetch « JPA Q&A

1. Understanding Hibernate Fetch stackoverflow.com

I know hibernate has lazy as default fetching strategy, but there are some things unclear to me so i hope you can explain it to me. What i want to do ...

2. Hibernate, best method of fetching one-to-many stackoverflow.com

Background I recently started a new Java EE 6 object, using JBoss and Hibernate. From earlier projects, I have experience with Glassfish using Eclipselink as JPA provider. In my earlier project, I ...

3. Many side of one-to-many not fetching for project (JPA 1.0) stackoverflow.com

I have a project that has a one to many requirement.

@Entity
@Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
public class User implements Serializable {

@Id
@Column(length=36)
@Visibility(scope=VisibilityType.IGNORED)
private String SUID;

@OneToMany(mappedBy = "user", cascade=CascadeType.ALL,fetch = FetchType.EAGER)
@JoinColumn(name="suid")
private Set<PropertyRow> profile = new HashSet<PropertyRow>();
...
getters, setters, ...

4. Hibernate: Problems while fetching data due to spaces coderanch.com

Hi - I am using Hibernate with Java Web Services and Oracle 10g. I use a method to fetch data for a key passed. (Method below). However in many cases, it is possible that the data may not be fetched as the passed Id resides in the database with spaces. I know if you use HQL you can trim the data. ...

5. [Hibernate]:Diff between Global fetch plan and fetching stategies coderanch.com

Hello ranchers. I was going through hibernate fetching strategies from "Java Persistence with hibernate" and found that there is global fetch plan and also fetching strategies. What is the difference between the two? For ex can i use something like this : make use of batch-size="10" for a class mapping and disable the proxy for that class? Can we use more ...

6. Diff between Global fetch plan and fetching stategies forum.hibernate.org

Hello, I was going through hibernate fetching strategies from "Java Persistence with hibernate" and found that there is global fetch plan and also fetching strategies. What is the difference between the two? For ex can i use something like this : make use of batch-size="10" for a class mapping and disable the proxy for that class? Can we use more than ...

7. Help needed Hibernate fetching stategies forum.hibernate.org

I am working on hibernate fetching strategies but unable to get the difference. I do not know where I am doing a mistake. I am using MySQL5.0 as DB. I have an Author class and a Books class. The relationship is One to many. I query the books and retrieve the author one by one but I am not able to ...

8. Problem with Hibernate not fetching set forum.hibernate.org

I am having a problem with Hibernate not retrieving an inverse set. I am using NetBeans 6.8 with the Hibernate Framework 3.2.5 and have used NetBeans to generate all of my config and POJO's from my mysql database model. I am using the InnoDB engine in mysql to enforce Foreign Key relationships. I have three tables User, UserRoles and UserRole - ...

9. Fetch groups? forum.hibernate.org

Hello *, I'm usually working with JDO (DataNucleus), but I'm currently conducting a customer's project with JPA (Hibernate). I normally make use of fetch-groups when detaching an object graph and wonder how I can do this with Hibernate. I know that JPA does not support fetch-groups, but I thought, there should be a way using Hibernate-specific API. My colleague and I ...

10. fetch strategies forum.hibernate.org

11. Problem on fetching data. forum.hibernate.org

Hi, I have a problem on fetching data. Following HQL is what I want to query (conceptually) Code: select a.att1 as att1 ,i.att2 as att2 ,i.att3 as att3 ,f.att4 as att4 ,e.att5 as att5 ,e.att6 as att6 ,b.att7 as att7 ,c.att8 as att8 ,c.att9 as att9 ,i.att10 as att10 from tb1 as a inner join a.key1 as b inner join b.key2 ...

12. Fetching 1-M where exactly one "M" matches criteri forum.hibernate.org

objectid_sequence ...

13. some problem with fetch command forum.hibernate.org

hi im using some objects with collections A -> B A -> C im using lazy loading on all collection im using oql to query some A items with constraints on B object and need loading C objects select a from com.object.a as a inner join com.object.b as b, com.object.a as a2 left join fetch a2.bs where b.field1:=val1 and b.field2:=val2 its ...

14. Outer fetching, and forum.hibernate.org

Hi, I have a little problem with Hibernate 2.1.3.key-many-to-one. Here is a part of my configuration, speaking for itself : Code: ... ...

15. FETCH and release 2.0 forum.hibernate.org

hi all, is fetch hql option supported by release 2.0 i've got Code: net.sf.hibernate.QueryException: in expected: produit.marque [from com.bo.produit.Produit as produit left join fetch produit.marque where produit.fiche.pere.idNomenclature=530] at net.sf.hibernate.hql.FromParser.token(FromParser.java:92) at net.sf.hibernate.hql.ClauseParser.token(ClauseParser.java:73) at net.sf.hibernate.hql.PreprocessingParser.token(PreprocessingParser.java:120) at net.sf.hibernate.hql.ParserHelper.parse(ParserHelper.java:29) at net.sf.hibernate.hql.QueryTranslator.compile(QueryTranslator.java:132) at net.sf.hibernate.hql.QueryTranslator.compile(QueryTranslator.java:119) at ...

16. fetch and release 2.0 forum.hibernate.org

17. outerjoin fetching forum.hibernate.org

Hi, the hibernate reference says that outer join fetchs data in a single sql select. What hibernate outer joing does for accomplishing this is a outer join comparisson in the tables??? When you use outer join, i assume that the selects recordset returned can get pretty big... so what are really the benefits of doing this??? Thanks, ltcmelo

18. SQL Server 2000 fetching Clob Data forum.hibernate.org

Hi again, I try to retrieve some objects, which contains a clob data field, via hibernate from my database. I an SQL Server 2000. I can fetch the data while the clob field is not filled, I can store data if I create some clob data first and store it on the database. But I can't get my stored data again ...

19. Fetch behaviour differences forum.hibernate.org

Following on from a previous thread, I'm trying to understand the apparent inconsistency in Hibernate's outer-join behaviour between and associations. Take the following mapping: ........ If I uncomment the , then run the query: session.find(from Parent"); then Hibernate will not include Child in an outer join. ...

20. fetch doesn't work as expected forum.hibernate.org

Hello, The main problem refers to data returned by HQL query. U use join fetch to lazy initialized sub-class. Returned list of Attribute objects contains properly initialized data. But AttributeValue objects that are lazy initialized are not fully initialized - all AttributeValues are OK, except the first object - it still holds proxy value. [0] Attribute.attributeValue -> proxy!!! [1] Attribute.attributeValue -> ...

21. Multiple fetching forum.hibernate.org

22. Hibernate ... fetch groups forum.hibernate.org

My understanding is that lazy initialization works such that once any field is retrieved hibernate retrieves all fields in a class mapping. I have a persistent class which has mappings to several other persistent classes. I do not necessarily need all of the relations each time I use the persistent class, so I am wondering if their is any way to ...

23. User-Role-Access fetch? forum.hibernate.org

Here is some additional information to my question. Java classes, UserBean private String username; private Set roles; RoleBean private String name; private Set access; AccessBean private String name; And I need to fetch data from three tables and then give it to logic, logic doesn't know about Hibernate, so I cannot use lazy initialization.

24. Many-to-one not being populated on fetch forum.hibernate.org

Hmm, I became suspicious of accessing the attribute directly as I wrote my post. After searching the posts on such topics I think I now understand what's going on under the hood a little better. I Changed my code to use getters/setters and it worked. I guess this is a hidden side-effect of the byte-code mods going on. The POJO isn't ...

25. How to use outer-fetch in Hibernate 2.1.1? forum.hibernate.org

Edmond Post subject: How come ???? still not getting what I need. Posted: Thu Nov 17, 2005 7:43 am Regular Joined: Sun Jan 18, 2004 9:43 am Posts: 50 Hi all I am still not getting what i need and I am very fraustrated about it. I have attached the source code, the xml file and the console output. ...

26. Outer fetch in Hibernate 2.1.1 forum.hibernate.org

Regular Joined: Sun Jan 18, 2004 9:43 am Posts: 50 Hi all I have posted a topic " How to use outer-fetch in Hibernate 2.1.1?" http://forum.hibernate.org/viewtopic.ph ... highlight= I am still not getting what i need and I am very fraustrated about it. I have attached the source code, the xml file and the console output. Please help! String hql = ...

27. Optimize data fetch. forum.hibernate.org

Hi All, I have a scenario in which I want to fetch all the Student data into a Student class. The structure ot Student class is as follows Student RollNo Name SubjectId Subject My table Structure is Student RollNo[PK] Name SubjectId[FK- Refers Subject.] Subject SubjectId[PK] Subject I tried to use join ...

28. facing problem while fetching data from more than one class forum.hibernate.org

Author Message avinashb Post subject: facing problem while fetching data from more than one class Posted: Wed Dec 28, 2005 8:51 am Beginner Joined: Fri Dec 23, 2005 3:26 am Posts: 21 Need help with Hibernate? Read this first: http://www.hibernate.org/ForumMailingli ... AskForHelp I am trying to convert the jetstore application of spring framework work with hibernate through the use ...

29. optimalization of fetching forum.hibernate.org

Hi all, I have the following mapping: . Generally these parameters are changed very seldom and there are fetched very often. Thus I would like to optimalize ...

30. Many to many and many to one doesn't fetch everything forum.hibernate.org

Please, help me to solve this problem: The session.load doesn't load all shifts associated with a schedule. It does load only the first shift associated with the schedule the rest is ignored. The schedule class has a collection of shifts ,and shift class has a collection of employees and vice versa employee class has a collection of shifts. Any help would ...

31. Fetching strategies Stats forum.hibernate.org

32. many-to-one not fetching "The One" forum.hibernate.org

Actual I am stupid, the reason why I was still getting the null point was because I was using an un-persistered class I had put on the session. Basicly the user logged in, so a create a User class to represent that user, check the users details in the DB if they match put user on the session. Thus tehre was ...

33. question about fetching forum.hibernate.org

34. Fetching one-to-one , why ? forum.hibernate.org

...

35. fetch data partially forum.hibernate.org

Hi, Hibernate: 8.2.6.ga Database: postgres and oracle I have to read data from the oracle-database (legacy), do some stuff with the data and then insert it into the postgres-database. however there is a lot of data (over a million rows with over 20 columns) and i dont want to hold all of the data in memory. how can i partially read ...

36. Hibernate: Problems while fetching data due to spaces forum.hibernate.org

37. Dynamic Model to fetch data(getting Exptn when fetch="j forum.hibernate.org

Hi, I am using dynamic model to fetch data. entity.hbm.xml: ============

38. Improving fetching speed forum.hibernate.org

I have a large database having 1 million records and I want to fetch each record(so my query is: select * from SampleCase) do some calculation and save it at some other place. I am sure that I will need the complete tree structure.. What is happening now is that the hibernate executes select query for each row of data. I ...

39. Hibernate not trying to fetch a set. forum.hibernate.org

I have a many-to-many mapping between classes named User and Data. My code successfully retrieves a User object from the database. The next thing it tries to do is retrieve a set of Data objects associated with the User object. It calls the User object's getData method which returns a PeristentSet, as it should. The code then calls the PersistentSet's size ...

40. Is possible to fetch random data? forum.hibernate.org

I need to fetch a given number of data entries. It is a big likelihood that a large number of data entries meet the query condition. So, for the limited spots, I would like to fetch a random X number of the data. Can this be done with Hibernate? Or, there is something in the Hibernate Search? I understand various DBs ...

41. UncategorizedSQLException when fetching data forum.hibernate.org

Newbie Joined: Thu Jun 04, 2009 10:02 am Posts: 6 Hi all, When trying to fetch data i encounter a really weird exception. The fetching is done in this following way: DAO: Code: public Calculation getCalculationByOfferVersion(int offerVersionId) { List result = getHibernateTemplate().findByNamedQueryAndNamedParam( ...