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From "Yun Lee (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-3991) Clob.truncate(0) throws exception
Date Sat, 28 Mar 2009 03:36:50 GMT

    [ https://issues.apache.org/jira/browse/DERBY-3991?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12690165#action_12690165
] 

Yun Lee commented on DERBY-3991:
--------------------------------

The patch derby-3991-2a.diff adopts the test cases in derby-3991-1a-ClobTruncateZeroTest.diff
provided by Kristian, and contains a change on  java/engine/org/apache/derby/impl/jdbc/EmbedClob.java.
With the patch, Test cases can run without any problem. Please check it. Thanks!

> 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, 10.5.0.0
>            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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