[jira] Resolved: (DERBY-2085) Misleading error message for non-matching ORDER BY clause in queries with GROUP BY.

["Bryan Pendleton (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/DERBY-2085?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Bryan Pendleton resolved DERBY-2085.
------------------------------------

       Resolution: Fixed
    Fix Version/s: 10.5.0.0
       Derby Info: [Regression]  (was: [Regression, Patch Available])

Committed the patch to the trunk as revision 653988.

This patch doesn't seem important enough to me to merge
back to 10.4 or 10.3, so for now I'm only intending to commit
it to the trunk.

If, after we get more experience with the patch in the trunk,
people feel that we ought to merge it back to one or more
branches, it should be straightforward to do so.


> Misleading error message for non-matching ORDER BY clause in queries with GROUP BY.
> -----------------------------------------------------------------------------------
>
>                 Key: DERBY-2085
>                 URL: https://issues.apache.org/jira/browse/DERBY-2085
>             Project: Derby
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 10.2.1.6
>         Environment: Any
>            Reporter: Øystein Grøvlen
>            Assignee: Bryan Pendleton
>            Priority: Trivial
>             Fix For: 10.5.0.0
>
>         Attachments: newMsgWithTest.diff
>
>
> In 10.2, this query gives the following error message:
> ij> SELECT i FROM t GROUP BY i ORDER BY j;
> ERROR 42Y30: The SELECT list of a grouped query contains at least one invalid expression. If a SELECT list has a GROUP BY, the list may only contain valid grouping expressions and valid aggregate expressions.  
> This is misleading since there is no invalid expression in the SELECT
> list.  It is the ORDER BY clause that is wrong.  
> I have marked this as an regression since the error message in 10.1 is
> more helpful (but still not correct):
> ij> SELECT i FROM t GROUP BY i ORDER BY j;
> ERROR 42Y36: Column reference 'J' is invalid.  For a SELECT list with a GROUP BY, the list may only contain grouping columns and valid aggregate expressions.

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