[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-1615) GROUP BY entity does not work

[Rafael Santini (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-1615?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=33508#action_33508 ] 

Rafael Santini commented on HHH-1615:
-------------------------------------

I also ran into this problem with SQL Server. With MySQL the same query works.

HQL:

select count(emprestimo.exemplar.obra), emprestimo.exemplar.obra from Emprestimo emprestimo where emprestimo.data between ? and ? group by emprestimo.exemplar.obra order by count(emprestimo.exemplar.obra) desc

SQL generated:

select count(exemplar1_.id_obra) as col_0_0_, exemplar1_.id_obra as col_1_0_, obra2_.id as id157_, obra2_.mfn as mfn157_, obra2_.titulo as titulo157_, obra2_.localizacao as localiza4_157_, obra2_.id_idioma as id5_157_, obra2_.id_tipo_obra as id6_157_, obra2_.id_categoria_obra as id7_157_, obra2_.id_area_obra as id8_157_, obra2_.id_base as id9_157_ from bs_emp_mov_emprestimo emprestimo0_, bs_emp_ace_exemplar exemplar1_, bs_emp_ace_obra obra2_ where emprestimo0_.id_exemplar=exemplar1_.id and exemplar1_.id_obra=obra2_.id and (emprestimo0_.data between ? and ?) group by exemplar1_.id_obra order by count(exemplar1_.id_obra) desc

Error:

A coluna 'bs_emp_ace_obra.ID' é inválida na lista de seleção porque não está contida em uma função agregada nem na cláusula GROUP BY.

> GROUP BY entity does not work
> -----------------------------
>
>                 Key: HHH-1615
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-1615
>             Project: Hibernate Core
>          Issue Type: Improvement
>          Components: query-hql
>    Affects Versions: 3.2.5
>         Environment: PostgreSQL 8.1.3, Hibernate 3.1.3
>            Reporter: Xavier Bugaud
>            Assignee: Anthony Patricio
>            Priority: Critical
>         Attachments: group-by-discriminator.patch, hibernate-group-by.diff
>
>
> The query : "select cat, count(*) from Cat cat group by cat" does not work.
> ERROR: column "xxxx" must appear in the GROUP BY clause or be used in an aggregate function
> See :
>  - http://forum.hibernate.org/viewtopic.php?t=953716
>  - http://jira.nhibernate.org/browse/NH-528

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