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From "C.S. Nirmal J. Fernando (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-4371) Non-selected columns for SELECT DISTINCT allowed in ORDER BY clause if ordered by expression
Date Wed, 28 Apr 2010 02:28:33 GMT

    [ https://issues.apache.org/jira/browse/DERBY-4371?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12861651#action_12861651
] 

C.S. Nirmal J. Fernando commented on DERBY-4371:
------------------------------------------------

Hi Bryan,

I ran Junit tests for the new modification and there's a failure. Following is the output
in JunitAll.out:

 orderby(org.apache.derbyTesting.functionTests.tests.lang.LangScripts)junit.framework.ComparisonFailure:
Output at line 1736 expected:<[C1 |C2 ]> but was:<[ERROR 42879: The ORDER BY clause
may not contain column 'expression', since the query specifies DISTINCT and that column does
not appear in the query result.]>
at org.apache.derbyTesting.functionTests.util.CanonTestCase.compareCanon(CanonTestCase.java:106)
at org.apache.derbyTesting.functionTests.util.ScriptTestCase.runTest(ScriptTestCase.java:198)
at org.apache.derbyTesting.junit.BaseTestCase.runBare(BaseTestCase.java:109)
at junit.extensions.TestDecorator.basicRun(TestDecorator.java:24)
at junit.extensions.TestSetup$1.protect(TestSetup.java:21)
at junit.extensions.TestSetup.run(TestSetup.java:25)
at org.apache.derbyTesting.junit.BaseTestSetup.run(BaseTestSetup.java:57)


Where can I found the query related to this ?
Thanks.

> Non-selected columns for SELECT DISTINCT allowed in ORDER BY clause if ordered by expression
> --------------------------------------------------------------------------------------------
>
>                 Key: DERBY-4371
>                 URL: https://issues.apache.org/jira/browse/DERBY-4371
>             Project: Derby
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 10.5.1.1
>            Reporter: Bernt M. Johnsen
>            Assignee: C.S. Nirmal J. Fernando
>            Priority: Critical
>         Attachments: DERBY-4371-2.diff, DERBY-4371.diff
>
>
> How to repeat:
> ij> create table t (i integer, j integer);;
> 0 rows inserted/updated/deleted
> ij> insert into t values (1,2),(1,3);
> 2 rows inserted/updated/deleted
> ij> select distinct i from t order by j;
> ERROR 42879: The ORDER BY clause may not contain column 'J', since the query specifies
DISTINCT and that column does not appear in the query result.
> ij> select distinct i from t order by j*2;
> I          
> -----------
> 1          
> 1          
> 2 rows selected

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