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Date: Wed, 5 Sep 2012 02:54:08 +1100 (NCT)
From: "Mamta A. Satoor (JIRA)" <jira@apache.org>
To: derby-dev@db.apache.org
Message-ID: <1036756950.33124.1346774048078.JavaMail.jiratomcat@arcas>
Subject: [jira] [Commented] (DERBY-672) Re-enable user defined aggregates
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    [ https://issues.apache.org/jira/browse/DERBY-672?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13447767#comment-13447767 ] 

Mamta A. Satoor commented on DERBY-672:
---------------------------------------

Hi Rick,

The user-defined aggregate name will not conflict with builtin function names, right? May be it is not even an issue for user-defined aggregates but I wanted to bring it up anyways. There is a pre-existing jira for conflict between user-defined function names with builtin functions DERBY-5901 (You can declare user-defined functions which shadow builtin functions by the same name. )
                
> Re-enable user defined aggregates
> ---------------------------------
>
>                 Key: DERBY-672
>                 URL: https://issues.apache.org/jira/browse/DERBY-672
>             Project: Derby
>          Issue Type: Improvement
>          Components: SQL
>            Reporter: Rick Hillegas
>            Assignee: Rick Hillegas
>         Attachments: derby-672-01-aa-ddl.diff, derby-672-02-ac-nonDistinct.diff, derby-672-03-aa-distinct.diff, derby-672-03-ab-distinct.diff, derby-672-04-aa-fixJSR169test.diff, derby-672-05-aa-java7testOrderProblem.diff, derby-672-06-aa-grantRevoke.diff, derby-672-07-aa-fixJSR169again.diff, UserDefinedAggregates.html, UserDefinedAggregates.html
>
>
> Nicolas Dufour in an email thread titled "functions and list" started on November 2, 2005 requests the ability to create user defined aggregates.
> This functionality used to be in Cloudscape. It was disabled presumably because it was considered non-standard. However, most of the machinery needed for this feature is still in the code. We should re-enable user defined aggregates after we agree on acceptable syntax.

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