[ https://issues.apache.org/jira/browse/OPENJPA-1819?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13055350#comment-13055350 ] 

Azuo Lee commented on OPENJPA-1819:
-----------------------------------

Could any ASF user please copy the code that fixes this issure from trunk to branch 2.0.x ?

> ORDER BY will append additional column to the SELECT clause which may potentialy cause ORA-00979 error
> ------------------------------------------------------------------------------------------------------
>
>                 Key: OPENJPA-1819
>                 URL: https://issues.apache.org/jira/browse/OPENJPA-1819
>             Project: OpenJPA
>          Issue Type: Bug
>          Components: sql
>    Affects Versions: 2.0.1, 2.0.2
>         Environment: OpenJPA 2.0
> WebSphere 6.1
> Oracle 9.2
>            Reporter: Azuo Lee
>            Priority: Critical
>             Fix For: 2.1.0
>
>         Attachments: OPENJPA-1819.patch
>
>
> Assuming entity Person and entity Exam has one-to-many association, the following JPQL statement:
> SELECT p.id r1, p.name r2, sum(e.score) r3 FROM Exam e LEFT JOIN e.person p GROUP BY p.id, p.name ORDER BY p.id
> will produce the following SQL, which is not executable if the underlining database is Oracle 9.2:
> SELECT t1.id, t1.name, SUM(t0.score) AS r3, t0.person FROM exams t0, persons t1 WHERE t0.person = t1.id(+) GROUP BY t1.id, t1.name ORDER BY t0.person ASC
> The additional column "t0.person" will cause error ORA-00979: not a GROUP BY expression.
> The correct SQL should be:
> SELECT t1.id, t1.name, SUM(t0.score) AS r3 FROM exams t0, persons t1 WHERE t0.person = t1.id(+) GROUP BY t1.id, t1.name ORDER BY t1.id ASC

--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira