Mailing-List: contact derby-dev-help@db.apache.org; run by ezmlm
Precedence: bulk
Reply-To: <derby-dev@db.apache.org>
Message-ID: <1673320449.1259366840939.JavaMail.jira@brutus>
Date: Sat, 28 Nov 2009 00:07:20 +0000 (UTC)
From: "Dag H. Wanvik (JIRA)" <jira@apache.org>
To: derby-dev@db.apache.org
Subject: [jira] Commented: (DERBY-4442) Evaluation of default value and
 identity in an INSERT result set evaluated too early.
In-Reply-To: <1591534517.1258132659683.JavaMail.jira@brutus>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit


    [ https://issues.apache.org/jira/browse/DERBY-4442?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12783189#action_12783189 ] 

Dag H. Wanvik commented on DERBY-4442:
--------------------------------------

Patch looks good to me; +1 to commit (before or after DERBY-4426, your call).


> Evaluation of default value and identity in an INSERT result set evaluated too early.
> -------------------------------------------------------------------------------------
>
>                 Key: DERBY-4442
>                 URL: https://issues.apache.org/jira/browse/DERBY-4442
>             Project: Derby
>          Issue Type: Bug
>          Components: SQL
>            Reporter: Dag H. Wanvik
>            Assignee: Knut Anders Hatlen
>         Attachments: always_prn.diff, d4442-1a.diff, d4442-1a.stat, d4442-1b.diff, insert.diff
>
>
> In contrast to generated column, which are evaluated when the next row from the result set to be inserted, currently default values and identity columns are generated "early", that is as part of avaluating the subquery (SELECT or VALUES as the case may be). 
> This does not currently cause a user visible bug in Derby, but it lies behind DERBY-3 and the effect Bryan observed in DERBY-4.
> Additionally, "early" computation has given rise to much special handling and ensuing bugs, cf. DERBY-1644, DERBY-4413, DERBY-4419, DERBY-4425 and others.
> DERBY-4397 requires this fix for correct behaviour with INSERT.
> See also
> https://issues.apache.org/jira/browse/DERBY-4413?focusedCommentId=12769532&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#action_12769532

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.