primary key « Query « JPA Q&A





1. Find primary key created by Hibernate JPA    stackoverflow.com

Short version: Is there a simple way to get the value of a primary key after doing a merge() in Hibernate JPA? Details: I'm making a generic library that uses Hibernate. The library ...

2. hibernate Query by primary key    stackoverflow.com

I wanna create query by primary key. Supposed I have class primary key, PersonKey, the properties is name and id. I have Person class, the property is PersonKey, address, DOB. Now, I wanna search ...

3. hibernate, couldn't find primary key info for (scheme_master_header)    stackoverflow.com

I am using Cordys tool which internally uses hibernate. I have two table scheme_master_header(primary key - scheme_id) & scheme_master_detail(primary key- scheme_dt_id & also have column scheme_id). I have got "scheme_dt_id" and ...

4. Hibernate criteria query that uses primary key of a related entity to filter results    stackoverflow.com

In our system our database looks like this

One agency has many brokerages, one brokerage has many users, one user has many orders.
I am trying to use the hibernate ...

6. one-to-one like primary key    forum.hibernate.org

7. Query by Example and primary key    forum.hibernate.org

Hey! I am trying to write a query by example, but i faced the following problem. If am passing an example object, with a primary key field initialized, then i get back the list of all records in my table. of course one of the possibilities is to write own implementation of PropertySelector. but i would like to write fetch methods ...

8. query on primary key returning more then one row    forum.hibernate.org

Hello, I have a query which normally should return only one row; I noticed however that in some cases it returns the same row twice. Did anyone run into this problem? when I copy/paste the query (constructed by hibernate) and execute it elsewhere, I get only one row; using P6spy I see the same query executed twice. I am using hibernate ...

9. find by primary key    forum.hibernate.org

Hello, I am currently working on migration of persistence layer from CMP to BMP using Hibernate as DAO's. My BMP ejbFindByPrimaryKey method looks like this: public BeanKey ejbFindByPrimaryKey(BeanKey key) throws FinderException { try { BeanDAO dao = (BeanDAO) DAOFactory.getInstance().getDAO(this); key = dao.findByPrimaryKey(key); return key; } catch (ObjectNotFoundDAOException onfde) { throw new ObjectNotFoundException(onfde.getMessage()); } catch(DAOException ex) { throw new FinderException(ex.toString()); } } ...





10. Query By Example and Primary Key Inclusion in Criteria    forum.hibernate.org

Hi, I am using Hibernate version:Hibernate 3.2.0.CR1 Name and version of the database you are using:Oracle 10g I want to ask that does Query By Example (using hibernate criteria api) includes the primary key field as criteria?. I tried running a peice of code which has primary key set on the example instance and execution proves that it does not include ...

12. One-to-one association with shared primary key ; N+1 selects    forum.hibernate.org

My rough guess is that it has something to do with the primary key specification and the foreign key generator class. It might relay on the Car property at some point. What happens if you change it to assigned? I understand this will somehow increase complexity of your code depending on usage scenarios you have for these two classes. Farzad-

13. Updating without first select based upon primary key    forum.hibernate.org

I was under the impression that you should always first load an object, modify any attributes you want and then persist it even if you know the primary key id of the entity you are updating. For example, if I am updating the phone number of an employee and I know their id (primary key) is 1234, it would not be ...