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https://issues.apache.org/jira/browse/DERBY-5162?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rick Hillegas updated DERBY-5162:
---------------------------------

    Attachment: derby-5162-01-aa-restoreToNull.diff

Attaching derby-5162-01-aa-restoreToNull.diff. This is a 1-line patch to 
SQLChar.restoreToNull() which fixes this bug. I will run regression tests. I 
don't propose to write a separate regression test for this problem. This fix 
should be covered by the more exhaustive test supplied in 
derby-2515-01-ac-copyINOUTreturnValues.diff.

Touches the following file:

M      java/engine/org/apache/derby/iapi/types/SQLChar.java


> CLOB INOUT arg set to NULL by procedure does not preserve NULL value when 
> re-invoked
> ------------------------------------------------------------------------------------
>
>                 Key: DERBY-5162
>                 URL: https://issues.apache.org/jira/browse/DERBY-5162
>             Project: Derby
>          Issue Type: Bug
>          Components: JDBC, SQL
>    Affects Versions: 10.8.0.0
>            Reporter: Rick Hillegas
>            Assignee: Rick Hillegas
>         Attachments: derby-5162-01-aa-restoreToNull.diff, z.java
>
>
> If a procedure sets an INOUT CLOB arg to NULL and is then re-invoked, the 
> NULL is not preserved. Instead, the procedure sees the same CLOB that it saw 
> in the last invocation. This bug was disclosed during the testing of the fix 
> for DERBY-2515. I will attach a repro.

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