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From "Bryan Pendleton (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (DERBY-2351) ORDER BY with expression with distinct in the select list returns incorrect result
Date Sun, 12 Aug 2007 22:27:43 GMT

     [ https://issues.apache.org/jira/browse/DERBY-2351?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Bryan Pendleton resolved DERBY-2351.
------------------------------------

       Resolution: Fixed
    Fix Version/s: 10.4.0.0

Committed the change to the 10.3 branch as revision 565184.

Need to update the fix versions, as JIRA isn't showing me an appropriate fix version right
now. The appropriate fix version is probably 10.3.2.0 or something like that.


> ORDER BY with expression with distinct in the select list returns incorrect result
> ----------------------------------------------------------------------------------
>
>                 Key: DERBY-2351
>                 URL: https://issues.apache.org/jira/browse/DERBY-2351
>             Project: Derby
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 10.2.2.0, 10.3.0.0
>         Environment: Any
>            Reporter: Yip Ng
>            Assignee: Bryan Pendleton
>             Fix For: 10.4.0.0
>
>         Attachments: derby_2351.diff, derby_2351_v2.diff, reproTests.diff
>
>
> When distinct is in the select list and the query has order by with expression, the resultset
produced contains an additional column.  
> ij> create table t1 (c1 int, c2 varchar(10))
> 0 rows inserted/updated/deleted
> ij> insert into t1 values (1,'a'),(2,'b'),(3,'c');
> 3 rows inserted/updated/deleted
> select distinct c1, c2 from t1 order by c1;
> C1         |C2
> ----------------------
> 1          |a
> 2          |b
> 3          |c
> 3 rows selected
> ij> select distinct c1, c2 from t1 order by c1+1;
> C1         |C2        |3                                 <=====returns 3 columns,
incorrect result returned
> ----------------------------------
> 1          |a         |2
> 2          |b         |3
> 3          |c         |4
> 3 rows selected

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