[jbossseam-issues] [JBoss JIRA] Commented: (JBSEAM-3032) count query used by Query is not compliant JPQL

[Dan Allen (JIRA)]

    [ https://jira.jboss.org/jira/browse/JBSEAM-3032?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12459786#action_12459786 ] 

Dan Allen commented on JBSEAM-3032:
-----------------------------------

This issue depends on a Hibernate issue. http://opensource.atlassian.com/projects/hibernate/browse/HHH-2266

Hibernate can support either of the following:

select count(u) from User u
select count(*) from User u

as long as the primary key is a single field. However, when the primary key is a composite key, then Hibernate generates invalid SQL for the following:

select count(v) from Vehicle v

select count((vehicle0_.registration, vehicle0_.state)) as col_0_0_ from Vehicle vehicle0_

So we can't move forward until Hibernate is fixed and upgrade in JBoss AS 5. We will have to detect the Hibernate version too because we don't want to break things.

> count query used by Query is not compliant JPQL
> -----------------------------------------------
>
>                 Key: JBSEAM-3032
>                 URL: https://jira.jboss.org/jira/browse/JBSEAM-3032
>             Project: Seam
>          Issue Type: Bug
>          Components: Framework
>    Affects Versions: 2.0.2.GA, 2.1.0.A1
>            Reporter: Dan Allen
>            Assignee: Dan Allen
>             Fix For: The future
>
>         Attachments: JBSEAM-3032-branch20-v1.txt, JBSEAM-3032-trunk-v1.txt
>
>   Original Estimate: 1 hour
>  Remaining Estimate: 1 hour
>
> The count query used by getCountEjbQl() in Query is not compliant JPQL. It should be:
> select count(Entity) from Entity entity
> instead of
> select count(*) from Entity entity
> Where "entity" is the class name of the entity (for instance, Person). You can test this by using TopLink or OpenJPA.
> All we need to do is replace the * with the name of the Entity. (We don't even need to fish for the alias used in the query).

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