row « Fetch « JPA Q&A





1. left join fetch query returns 0 rows    forum.hibernate.org

16:17:29,133 DEBUG SQL:237 - select state0_.id as id, state0_.name as name from zzz_state state0_ 16:17:29,148 DEBUG SQL:237 - select cities0_.id as id__, cities0_.state_id as st ate_id__, cities0_.id as id0_, cities0_.name as name0_, cities0_.state_id as sta te_id0_ from zzz_city cities0_ where cities0_.state_id=? 16:17:29,148 DEBUG SQL:237 - select cities0_.id as id__, cities0_.state_id as st ate_id__, cities0_.id as id0_, cities0_.name as name0_, cities0_.state_id as ...

2. FETCH first n rows only    forum.hibernate.org

3. left join fetch fires ObjectNotFoundException if no rows fou    forum.hibernate.org

Hello, a newbie-question: I have a -association with unique=true. I implemented a HQL-query with a "left join fetch". If no rows found in lookup-table by the first access, hibernate performs an additional select on the lookup-table and fires a ObjectNotFoundException. I expected as result an object-list from the parent-table, even if no dependent rows found in the lookup-table. Wheres my mistake? ...

4. How can I do "Fetch first row only"?    forum.hibernate.org

Ok, so I'm trying to do some performance tuning. I have a query that runs really long. To simplify the problem, we'll talk about the part of it that's causing the problem... In my mapping documents, I map using a formula that selects from another table and then does a GROUP BY on the column being returned. The GROUP BY is ...

6. Left Join Fetch Query Returning More Rows Than Expected    forum.hibernate.org

I have a query that should only be returning 1 row but instead is returning multiple rows. I suspect this is due to the fact that I'm using a left join fetch. My query is as follows: select d FROM Declaration d left join fetch d.propertyAddress left join fetch d.propertyAddress.additionalPins ... Anyone know why this might be causing a problem?