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https://issues.apache.org/jira/browse/DERBY-4245?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12714806#action_12714806
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Knut Anders Hatlen commented on DERBY-4245:
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It doesn't look like the upgrade step is necessary in order to reproduce this 
issue. I also see the NPE when I create the database with trunk. The preview 
patch appears to fix it.

> Sorting a table containing a CLOB fails after upgrade to 10.5
> -------------------------------------------------------------
>
>                 Key: DERBY-4245
>                 URL: https://issues.apache.org/jira/browse/DERBY-4245
>             Project: Derby
>          Issue Type: Bug
>          Components: Store
>    Affects Versions: 10.5.1.1
>            Reporter: Knut Anders Hatlen
>            Assignee: Kristian Waagan
>         Attachments: derby-4245-0a-preview.diff, MixedVersionClob.java
>
>
> When sorting a table containing a CLOB column in a database that has been 
> soft-upgraded from 10.4.2.0 to 10.5.1.1, the query fails with a 
> NullPointerException.
> Reported on derby-user: 
> http://mail-archives.apache.org/mod_mbox/db-derby-user/200905.mbox/%[email protected]%3e

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