Criteria « Fetch « JPA Q&A

1. Hibernate: Enabling lazy fetching in Criteria API stackoverflow.com

I am writing a query against a domain model where (for whatever reason) a one-to-many association is mapped with lazy="false". In my particular query, I'd rather fetch that collection lazily, because ...

2. JPA 2 Criteria Fetch Path Navigation stackoverflow.com

With JPA 2 Criteria Join method I can do the following:

    //Join Example (default inner join)
    int age = 25;
    CriteriaBuilder cb ...

3. criteria api--root.fectch() how to fetch a collection? stackoverflow.com

The args' type of method fetch() can be SingularAttribute, PluralAttribute, why not can't be ListAttribute ? Then, how to fetch a collection with critria api ? Thank you.

4. eager fetching of lazy formulas via criteria api forum.hibernate.org

I have simple entity with lazy @Formula property: Code: public class TestEntity { public Long testId; @Column(name = "test_id") @Id public Long getTestId() { return testId; } public void ...

5. EAGER fetching behavior of Criteria forum.hibernate.org

Hibernate: select a.ID, a.NAME, b.ID, b.NAME from A a left outer join B b on a.ID=b.ID DEBUG - object not resolved in any cache [B#0] DEBUG - Materializing entity: [B#0] DEBUG - about to open: 0 open PreparedStatements, 0 open ResultSets DEBUG - select b.ID, b.NAME from B b where b.ID = ? Hibernate : select b.ID, b.NAME from B b ...

6. Criteria api eager fetch problem forum.hibernate.org

Hibernate version:3.0alpha Name and version of the database you are using:mysql 4.1 Hi, I have a problem with the criteria api. I am usign . I have Mail, Receiver classes. Mail has the following one-to-many collection of Receivers: My code looks like this: Criterion crit = ...; ...

7. how to retrieve data by criteria? forum.hibernate.org

8. criteria, createAlias and eager fetching question forum.hibernate.org

Hibernate version: 2.14 Can someone explain me the exact relation between eager fetching and outer joins when using criteria queries? It seems that eager fetching of objects is impossible when using inner joins and I don't understand why? Hibernate in action says that it is not possible to use eager fetching with aliases. I agree that using an alias imply an ...

9. Criteria - setFetchMode() - addOrder() - join forum.hibernate.org

I am confused about how Criteria.setFetchMode() is supposed to be used. I've setup three simple classes: A, B, and C. Class A contains an instance of Class B. Class B contains an instance of Class C. Each class has one other property and an ID. A has a name (String). B has a color (String). C has a size (Integer). My ...

10. criteria example query returns dupes with fetch="join&q forum.hibernate.org

Author Message jsimone Post subject: criteria example query returns dupes with fetch="join&q Posted: Fri Jun 03, 2005 12:09 pm Newbie Joined: Wed Feb 16, 2005 10:46 am Posts: 13 Location: Lake Worth, FL It is my understanding that fetch="join" is used to return data with one query, using joins, rather that multiple selects without joins. However I find that ...

11. Automatic EAGER fetching with Criteria API forum.hibernate.org

Hibernate 3.0.5 Is there a simple global property to turn the fetch strategy to EAGER for all the association mappings, HQL and Criteria queries? I couldn't find any and it seems that the Criteria API ignores our outer-join="true" settings. If there isn't such a switch, how can I get the class (or entity name) from a Criteria object? I mean if ...

12. Dynamic Query : what is best fetch HQL or Criteria ? forum.hibernate.org

13. timeout while fetching bulky data using criteria forum.hibernate.org

Hibernate version: 3.0.5 Name and version of the database you are using:oracle 9i The generated SQL (show_sql=true): Hibernate: select this_.id as id0_, this_.tcn as tcn19_0_, this_.name as name19_0_, this_.description as descript5_19_0_, this_.volume as volume19_0_, this_.last_change as last7_19_0_, this_.last_group_change as last8_19_0_, this_.dov_id as dov9_19_0_, this_.pco_id as pco10_19_0_, this_.sequence as sequence19_0_, this_.product_number as product11_19_0_, this_.number_of_outlets as number12_19_0_, this_.pde_id as pde14_19_0_, this_.con_id as con15_19_0_ ...

14. associationPath in Criteria#setFetchMode forum.hibernate.org

Hello, this topic is atually related to http://forums.hibernate.org/viewtopic.p ... d568f4e031 , but the that thread seems to be overloaded with different issues, so I'm creating a new one... The [b]contract [/b]for Criteria#setFetchMode(String associationPath, FetchMode mode) is as follows: Specify an association fetching strategy for an association or a collection of values. Parameters * associationPath - a dot seperated property path * ...

15. Criteria API: setFetchMode with createCriteria forum.hibernate.org

16. join without fetching in HQL (or with Criteria API) forum.hibernate.org

Hello, I have troubles with join without fetching in criteria or with HQL: My model is simple: orders linked to lineitems by one-to-many and say I would like to get orders that have lineitems with a certain reference number: 'lineitem.reference like '%aa%' in HQL. The problem is that i get duplicated orders, as many times there are items in these orders ...

17. To fetch rec from MappedTable using Criteria Qry(immediate) forum.hibernate.org

I have two tables Table A and Table B which have an Mapped Table MAB structure of table A id int pk serialno int Table B id int pk name string Table MAB aPk int bPk int Now i have to fetch the records from table MAB for all aPk associated with bPk say 5 aPk are there for on bPk ...

18. Problem with using Fetching and Restrictions in Criteria qry forum.hibernate.org

Author Message Moonee Valley Post subject: Problem with using Fetching and Restrictions in Criteria qry Posted: Tue Apr 17, 2007 7:13 am Newbie Joined: Tue Apr 17, 2007 4:02 am Posts: 10 Hi all Were having a few problems fetching associated entities for One-to-Many relationship in a relatively simple Criteria query: 1) We have to specify an additional join ...

19. Fetch/join HQL/Criteria inconsistencies forum.hibernate.org

Hi, I've noticed that the fetch/join options seem to result in different behaviour when using criteria vs HQL. Consider this: If performing an HQL, this will result in the reference being looked up non-lazily. I.e. after the HQL, the collection is populated. However, take away lazy="false" and this is not the case. But the fetch="join" ...

20. Criteria and fetch forum.hibernate.org

Hi, I use a Criteria to find an object and when I use the list() methode I have an Exception : object references an unsaved transient instance - save the transient instance before flushing B But this B object is never use in this Criteria. I find the problem because in fact just before my Criteria I use a transient object ...

21. eager fetching lazy collection with criteria? forum.hibernate.org

I need to eager fetch a lazy collection with Criteria. The JPA book seems to indicate that I can use FetchMode.JOIN to override laziness on a collection and force it to load. This doesn't seem to be working for my example below: Mapping file Code: ...