[hibernate-issues] [Hibernate-JIRA] Updated: (HHH-5141) hql group by on multiple classes generates 1 query by class and can return a wrong number of results

[Gail Badner (JIRA)]

     [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-5141?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Gail Badner updated HHH-5141:
-----------------------------

    Affects Version/s: 3.5.1

Eric, thanks for checking!

> hql group by on multiple classes generates 1 query by class and can return a wrong number of results
> ----------------------------------------------------------------------------------------------------
>
>                 Key: HHH-5141
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-5141
>             Project: Hibernate Core
>          Issue Type: Bug
>          Components: query-hql
>    Affects Versions: 3.3.0.SP1, 3.5.1
>         Environment: Hibernate Annotations 3.4.0.GA, HSQLDB 1.8.0.10
>            Reporter: Eric Citaire
>            Priority: Critical
>
> The classes DomesticDog and DomesticCat extend / implement Pet.
> Here is the data of the 2 tables :
> {{DomesticDog}}
> {{+----+----------------------+}}
> {{|  1 | Max                  |}}
> {{|  2 | Buddy                |}}
> {{|  3 | Jake                 |}}
> {{|  4 | Buddy                |}}
> {{+----+----------------------+}}
> {{DomesticCat}}
> {{+----+----------------------+}}
> {{|  1 | Tiger                |}}
> {{|  2 | Smokey               |}}
> {{|  3 | Tiger                |}}
> {{|  4 | Max                  |}}
> {{+----+----------------------+}}
> Given the HQL query :
> {{select pet.name from Pet pet group by pet.name having count(pet) > 1}}
> Two SQL queries are generated and executed separately :
> {{select domesticdog0_.name as col_0_0_ from DomesticDog domesticdog0_ group by domesticdog0_.name having count(domesticdog0_.id)>1}}
> {{select domesticcat0_.name as col_0_0_ from DomesticCat domesticcat0_ group by domesticcat0_.name having count(domesticcat0_.id)>1}}
> It returns only : "Buddy" and "Smokey". But it does not return "Max" wich is the name of a cat and a dog.

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