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From "Kristian Waagan (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-3991) Clob.truncate(0) throws exception
Date Tue, 31 Mar 2009 14:34:20 GMT

    [ https://issues.apache.org/jira/browse/DERBY-3991?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12694129#action_12694129
] 

Kristian Waagan commented on DERBY-3991:
----------------------------------------

Regarding the error message, I'm just wondering if the users should be notified about the
change through a release note [1]. We have a release note template under "trunk/tools/release/templates/releaseNote.html",
if you want to take a look.
I agree the change is a good one, but I don't know if the change requires that the community
notifies the users about the changed error message.
Maybe someone else in the community has a stronger opinion about this?


[1] FYI, here are the release notes for 10.4: http://db.apache.org/derby/releases/release-10.4.2.0.cgi#Release%20Notes%20for%20Derby%2010.4.2.0
    Note especially under "Issues" and the "Note for DERBY-X" paragraphs.

> Clob.truncate(0) throws exception
> ---------------------------------
>
>                 Key: DERBY-3991
>                 URL: https://issues.apache.org/jira/browse/DERBY-3991
>             Project: Derby
>          Issue Type: Bug
>          Components: JDBC
>    Affects Versions: 10.3.3.1, 10.4.2.1, 10.5.1.0, 10.6.0.0
>            Reporter: Kristian Waagan
>            Assignee: Yun Lee
>            Priority: Minor
>         Attachments: derby-3991-1a-ClobTruncateZeroTest.diff, derby-3991-2a.diff
>
>
> Truncating a Clob to zero length is allowed according to the JDBC specification, which
says the following about the len argument (in the @throws tag):
> "SQLException - if there is an error accessing the CLOB value or if len is less than
0 "
> Derby throws an exception if zero is passed to truncate.
> A quick inspection of the code suggests that truncating a Clob to the empty string is
easy to support.

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