[seam-issues] [JBoss JIRA] (JBSEAM-4854) countQuery not correcly generated when group by is used

[Tiago Peruzzo (JIRA)]

    [ https://issues.jboss.org/browse/JBSEAM-4854?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13112983#comment-13112983 ] 

Tiago Peruzzo commented on JBSEAM-4854:
---------------------------------------

[~mnovotny]  this change has affected my queries that have group by. Now the count returns without the distinct and appears a number of different records than return the select with group by.

Sample:
select min (e.birthYear), count (*) from Person p group by p.birthYear

The correct count should be:
select count (distinct p.birthYear) from Person p

https://github.com/seam2/jboss-seam/commit/a73ff489e9f62fcacf6c9593889018599ebd925b


> countQuery not correcly generated when group by is used
> -------------------------------------------------------
>
>                 Key: JBSEAM-4854
>                 URL: https://issues.jboss.org/browse/JBSEAM-4854
>             Project: Seam 2
>          Issue Type: Bug
>          Components: Framework
>    Affects Versions: 2.3.0.ALPHA
>            Reporter: Sergio Angelo
>            Assignee: Marek Novotny
>             Fix For: 2.3.0.BETA1
>
>   Original Estimate: 4 hours
>  Remaining Estimate: 4 hours
>
> When an EntityQuery contains a group-by, then the select statement of the count-query is not correctly generated.
> Example query for reproducing the problem:
> select min(e.receivedDate), count(*) 
> from Entity e 
> where ... 
> groupby date_trunc('year', e.receivedDate), date_trunc('quarter', e.receivedDate)
> The count-query becomes as follows (which generates an exception when run):
> select distinct date_trunc('year', l.receivedDate), date_trunc('quarter', e.receivedDate)
> from etc.



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