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From "Dyre Tjeldvoll (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-2085) Misleading error message for non-matching ORDER BY clause in queries with GROUP BY.
Date Fri, 07 Mar 2008 16:05:46 GMT

    [ https://issues.apache.org/jira/browse/DERBY-2085?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12576252#action_12576252
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Dyre Tjeldvoll commented on DERBY-2085:
---------------------------------------

I believe the error message in question was modified in

------------------------------------------------------------------------
r437070 | djd | 2006-08-26 05:55:39 +0200 (Sat, 26 Aug 2006) | 2 lines

DERBY-883 Enhance GROUP BY clause to support expressions instead of just column references.
Patch contributed by Manish Khettry - manish_khettry@yahoo.com
------------------------------------------------------------------------

but I could not verify it because I'm no longer able to build revision 437069 with a modern
jdk6.

> 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
>            Priority: Trivial
>
> 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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