[jira] Updated: (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 updated DERBY-2085:
-----------------------------------

    Derby Info: [Patch Available, Regression]  (was: [Regression])

Any opinions on this patch? All the tests pass, but since it changes the
error message that is returned, it would be nice to have some opinions
about which error message is preferable. I think the patch is a (small) improvement.

If no-one has any particular opinion, I'll commit this patch later this week.


> 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
>         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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