LAZY « Fetch « JPA Q&A





2. Lazy fetch suggestion    forum.hibernate.org

I don't know if it is the best place to do it, but... I am in a big project with JPA(Hibernate), Spring and Richfaces We built it in a way that we got a great productivity, but the lazy fetch... I solved it by using OpenEntityManagerInView and since our model is too complicated, we clone some objects whose life continues after ...

3. Lazy fetch problem?    forum.hibernate.org

Hi, I have mapped file called Seller. It has 2 lazy many to one associations : Code: ... @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER, mappedBy = "seller") public Set getSellerSchedules() { return this.sellerSchedules; } public void setSellerSchedules(Set sellerSchedules) { this.sellerSchedules ...

4. LAZY fetching    forum.hibernate.org

hi, I have an object with some other objects related to it with the "one-to-many" relation. These mappings have fetchType=EAGER and fetchMode=SUBSELECT. Code: @OneToMany(mappedBy = "id.object", cascade = CascadeType.ALL, fetch = FetchType.EAGER) @Fetch(value = FetchMode.SUBSELECT) @Cache(region = "business", usage = CacheConcurrencyStrategy.READ_WRITE) public Collection getObjectChild() { ...

5. Lazy fetching issue    forum.hibernate.org

Newbie Joined: Tue Oct 11, 2011 5:15 pm Posts: 1 Hello guys i have a small issue with lazy fetching i have two entities Code: @Entity @Table(name = "users", schema = "public") public class User implements java.io.Serializable { /** * */ private static final long serialVersionUID = ...

6. Lazy data fetching for primitives    forum.hibernate.org

Hello, Does hibernate supports lazy fetching of primitive types? For ex. We have an object Catalog and its have a property defintion, of type clob. Now can it be possible that definition will be fetched only on demand, ie not with the main object catalog. XML mapping file is:

7. lazy fetching    forum.hibernate.org

Hello. A have a problem or rather misunderstanding :( There is relation one-to-many Code: private ...

8. Lazy fetching, queries, joins and tuples    forum.hibernate.org

Hello all, I'm trying to figure out how to do a query for objects and have associated objects loaded in one query rather than 1+n where n is the number of many-to-one mappings the object has. In the mapping for a Department object the properties for the organization and contact associations are as follows: Code: ...

9. How to fine tune lazy fetching on a query basis?    forum.hibernate.org

Hi, for the cats model, let's assume that a cat not only has a one-to-many property kittens, but also a one-to-many property favfoods. What HQL / criteria can I use to load all cats for certain conditions, e.g. name starts with A, and have kittens populated for these cats while favfoods is not populated? Right now I am doing this with ...





10. need help to understand many-to-one lazy and fetch    forum.hibernate.org

Hello, I read the hibernate 3 docs, the migration guide, and the forum posts, but I am still not sure how many-to-one lazy=false, fetch=join, and at class lazy=true, proxy=proxyClass works together. Can someone who has understood all these explain how setting each of these in combination would work? e.g: I have class A that has many-to-one on class B. When class ...

11. 'lazy' affects 'fetch' semantics    forum.hibernate.org

According to this, laziness (what is fetched) is orthogonal to the fetching strategy itself (how it is fetched). It seems to follow that for a given many-to-one, which has fetch="select" behaviour by default when the associated class is lazy="proxy", changing the associated class' mapping to lazy="false" should not affect the fetch strategy, yet it does. The fetch strategy changes to fetch="join", ...

12. ETL scenario, lazy fetch problem    forum.hibernate.org

I'm using Hibernate 3.1 to assist in an ETL scenario with a database. The jist of my task is to perform a "select * from table" type query and process all of the results one at a time [details irrelevant]. That's what I'd do if I were using straight JDBC, anyway. The table has thousands of records; I can't afford to ...

13. problems w/ lazy fetching    forum.hibernate.org

14. Applet - Hibernate - Lazy Fetching    forum.hibernate.org

Hello, i've implemented a servlet, that provides an applet with data from a server-side database via hibernate. The data is encapsulated in a bean, that was generated from my database with hibernate tools in eclipse. My problem is, that hibernate's lazy-fetching doesn't work on the applet-side. How can I solve this problem? 1. Do I have to provide the transfered object ...

15. Lazy fetching and propagating data to a web tier    forum.hibernate.org

Hi. I have a model layer written with hibernate, and I have for example entities Code: public class ClassA{ Integer id; String name; ClassB reference; //lazily fetched } public class ClassB{ Integer id; String someString; } and I want to have a web tier independet to the business code, so I ...

16. Fetch / Restrinction / Data Issue (Lazy=true)    forum.hibernate.org

Author Message cmodic Post subject: Fetch / Restrinction / Data Issue (Lazy=true) Posted: Wed Apr 19, 2006 12:41 pm Newbie Joined: Tue Apr 18, 2006 9:36 pm Posts: 6 Location: Los Angeles, CA Okay, I have been working on this issue for about a week. I have read as much documentation as I can find. I have read the ...





17. lazy fetching for one-to-one impossible??    forum.hibernate.org

Hello, I have 2 classes that are related through a one-to-one association, which is mapped to a foreign key. I am doing a query that retreives all instances of class A. When I look at the generated SQL, I see that for each A, another statement is issued to get the related B - leading to the infamous N+1 problem with ...

18. Is Lazy Fetching Always Good?    forum.hibernate.org

Hi, I'm quiet challenged by the idea of lazy fetching, especially in certain cases. I hear people saying to always use lazy fetching, and Hibernate 3 comes with lazy fetching true by default. To me, lazy fetching is just a way of postponing the query execution a little longer.. maybe to another method.. but the query has to be executed to ...

19. Custom Lazy Fetching    forum.hibernate.org

20. Problem in understanding Lazy fetching.    forum.hibernate.org

Hi Experts I m new to hibernate and i need to develop on application in hibernate. I did not understand the Lazy fetching.Can any one Plz Plz Plz Plz Plz Plz Plz Plz give me an example where exactly lazy fectching comes in to play.I will be thankful if u give the complete code. Plz explain me a senario where lazy ...

21. How to fully prevent lazy fetching?    forum.hibernate.org

22. Lazy fetch with lazy="false"    forum.hibernate.org

Hi, having to modify a critical process, I stumbled upon a POJO having quite alot of children. All of these children are set as 'lazy="false"'. Now, I'm wondering if it's possible to set some of these children lazy at runtime, so that one of the new queries will not try to load them? Using Hibernate's DetachedCriteria, I tried several combinations with ...

23. LAZY FETCHING    forum.hibernate.org

24. DOM4j Lazy Fetch Problem    forum.hibernate.org

Hi all, I have a problem using dom4j. I need to set a lazy fetching in my hibernate mapping, but it seems that dom4j doesn't support it. In fact I use dom4j in order to be database schema independent, but I have a huge database and when I try to execute a query with dom4j mode it fetches all tuples ignoring ...