[jboss-jira] [JBoss JIRA] Commented: (JBAS-3800) EJBQLToSQL92Compiler should use only searchable columns with DISTINCT

[anajavi (JIRA)]

    [ http://jira.jboss.com/jira/browse/JBAS-3800?page=comments#action_12354894 ] 
            
anajavi commented on JBAS-3800:
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This can be reproduced with Sybase using TEXT columns. 

I once tested this with couple of RDBMS's, and most of them didn't support DISTINCT with Clob or Blob. However postgresql seems to accept DISTINCT queries in Clob fields. 



> EJBQLToSQL92Compiler should use only searchable columns with DISTINCT
> ---------------------------------------------------------------------
>
>                 Key: JBAS-3800
>                 URL: http://jira.jboss.com/jira/browse/JBAS-3800
>             Project: JBoss Application Server
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: CMP service
>    Affects Versions: JBossAS-4.0.5.GA, JBossAS-3.2.8.SP1
>            Reporter: Alexey Loubyansky
>         Assigned To: Alexey Loubyansky
>
> Currently it selects all columns which causes errors since, e.g. BLOBs are not comparable or searchable and, hence, can't be used with distinct.

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