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From "Kristian Waagan (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (DERBY-4040) SQLChar.getLength returns wrong length for some data values
Date Thu, 19 Feb 2009 10:48:01 GMT

     [ https://issues.apache.org/jira/browse/DERBY-4040?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Kristian Waagan resolved DERBY-4040.
------------------------------------

       Resolution: Fixed
    Fix Version/s: 10.4.2.1
                   10.3.3.1

Backported the fix from 10.4 to the 10.3 branch with revision 745811.

The tinderbox test for 10.4 ran cleanly.
I'm resolving the issue, and will await the tinderbox results from 10.3 before I close.

> SQLChar.getLength returns wrong length for some data values
> -----------------------------------------------------------
>
>                 Key: DERBY-4040
>                 URL: https://issues.apache.org/jira/browse/DERBY-4040
>             Project: Derby
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 10.3.3.1, 10.4.2.0, 10.5.0.0
>            Reporter: Kristian Waagan
>            Assignee: Kristian Waagan
>             Fix For: 10.3.3.1, 10.4.2.1, 10.5.0.0
>
>         Attachments: derby-4040-1a-SQLChar_length_and_test.diff, derby-4040-1a-SQLChar_length_and_test.stat,
derby-4040-2a-backport.diff
>
>
> SQLChar.getLength() returns the wrong length of the data value in some cases.
> For the bug to be triggered, the value must contain characters that are represented by
two or three bytes, and Derby must store the value as a stream.
> In my ad-hoc testing, I found that a value of length 10886 with CJK characters doesn't
trigger the bug, but 10887 does trigger the bug. Further, for a range of lengths the bug can
also been observed for CLOB columns (when doing 'select length(clobcolumn)').

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