[hibernate-issues] [Hibernate-JIRA] Created: (HHH-5992) A query fails to return correct results silently

[Tom Ross (JIRA)]

A query fails to return correct results silently
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                 Key: HHH-5992
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-5992
             Project: Hibernate Core
          Issue Type: Bug
          Components: core
    Affects Versions: 3.3.2
         Environment: JBoss EAP 5.1
            Reporter: Tom Ross


The following query fails silently to return a correct result select v1.username, v2.username from user_ety v1, user_ety v2 where v1.username = '1' and v2.username = '2'. It returns one row with "1,1" instead of one row with "1,2".
The query works with pre JPA CMP EJBs (ver 2.1) but fails when moved to JPA based persistence.
This failure is very dangerous since it is silent and without manually checking data it is impossible to determine if a correct set is returned.

The workaround is to use aliases and modify the query so it looks like that:

select v1.username as username1, v2.username as username2 from user_ety v1, user_ety v2 where v1.username = '1' and v2.username = '2'.


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