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From "Kristian Waagan (JIRA)" <j...@apache.org>
Subject [jira] Updated: (DERBY-3991) Clob.truncate(0) throws exception
Date Mon, 30 Mar 2009 10:20:52 GMT

     [ https://issues.apache.org/jira/browse/DERBY-3991?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Kristian Waagan updated DERBY-3991:
-----------------------------------

    Affects Version/s:     (was: 10.5.0.0)
                       10.6.0.0
                       10.5.1.0

The patch looks good to me.

You could consider trying to access the empty string using a stream too (currently the test
I wrote originally only uses getSubString).
Users will also see a different error message with the embedded driver now. Does this warrant
a release note?
The new error message is both more specific and it is the same as the one thrown by the client
driver, which is justification enough for the change.

I'll kick off a test run.

> 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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