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From "Mike Matrigali (JIRA)" <j...@apache.org>
Subject [jira] Updated: (DERBY-4442) Evaluation of default value and identity in an INSERT result set evaluated too early.
Date Sat, 03 Jul 2010 15:39:53 GMT

     [ https://issues.apache.org/jira/browse/DERBY-4442?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Mike Matrigali updated DERBY-4442:
----------------------------------

    Assignee: Mike Matrigali  (was: Knut Anders Hatlen)

working on backporting this issue to 10.5.  DERBY-4419, DERBY-4413, DERBY-4425, and DERBY-4442
all seem related.  I am going to apply and checkin the backported changes to these issues
in order.  I think the changes necessary are:
DERBY-4413 #829410
DERBY-4419 #831304
DERBY-4425 #831319
DERBY-4442 #885421
DERBY-4413 #885659
DERBY-4442 #888311

> 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
>    Affects Versions: 10.5.3.0
>            Reporter: Dag H. Wanvik
>            Assignee: Mike Matrigali
>             Fix For: 10.6.1.0
>
>         Attachments: always_prn.diff, backout-derby-4425.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

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