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From "Azuo Lee (JIRA)" <j...@apache.org>
Subject [jira] Created: (OPENJPA-1715) OpenJPA generates wrong SQL if a result variable that references an aggregate expression is used in ORDER BY clause
Date Thu, 01 Jul 2010 10:23:49 GMT
OpenJPA generates wrong SQL if a result variable that references an aggregate expression is
used in ORDER BY clause
-------------------------------------------------------------------------------------------------------------------

                 Key: OPENJPA-1715
                 URL: https://issues.apache.org/jira/browse/OPENJPA-1715
             Project: OpenJPA
          Issue Type: Bug
          Components: jpa
    Affects Versions: 2.0.0
         Environment: Tomcat 6 + Oracle 9i
            Reporter: Azuo Lee


For the following JPQL (According to JPA sepcification v2.0, section 4.9, it is legal to use
result variables in the order by clause):

select _v_.id _r0, sum(_v0_.score) _r1 from Stall _v_ left join _v_.scores _v0_ where _v_.deleted
= :_p0_ and _v_.market = :_p1_ group by _v_.id order by _r1 desc, _r0

but OpenJPA generates a wrong SQL as following:

SELECT t0.id AS c0, SUM(t1.score) AS _r1 AS c1 FROM stalls t0, scores t1 WHERE (t0.deleted
= ? AND t0.market = ? AND 1 = 1) AND t0.id = t1.stall(+) GROUP BY t0.id ORDER BY _r1 DESC,
t0.id ASC

The second result item in the select clause has 2 aliases specified: "SUM(t1.score) AS _r1
AS c1", which is obviously not acceptable by the underlining database.

Additional question:
How can i order NULL values, like the behavior achieved by using Oracle "ORDER BY SUM(t1.score)
DESC NULLS LAST", by using JPQL?


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