[hibernate-issues] [Hibernate-JIRA] Created: (HHH-2577) HQL: "select count(e.collection) from MyEntity e" produces wrong SQL

[Fabio Tudone (JIRA)]

HQL: "select count(e.collection) from MyEntity e" produces wrong SQL
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                 Key: HHH-2577
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2577
             Project: Hibernate3
          Issue Type: Bug
          Components: query-hql
    Affects Versions: 3.2.3
         Environment: Hibernate 3.2.3, DB2/NT UDB 8
            Reporter: Fabio Tudone
         Attachments: Test.jar

Suppose "A" and "B" are entities and A contains a bag (Collection) "bs" (one-to-many) of B instances. Then the following HQL query:

    select count(a.bs) from A a

produces the following DB2 SQL statement:

    select
        count(.) as col_0_0_ 
    from
        A a0_,
        B b1_ 
    where
        a0_.k = b1_.k

which is not legal.

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