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https://issues.apache.org/jira/browse/DERBY-6567?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14169463#comment-14169463
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ASF subversion and git services commented on DERBY-6567:
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Commit 1631457 from [email protected] in branch 'code/branches/10.10'
[ https://svn.apache.org/r1631457 ]
DERBY-6567: Incorrect nullability for CASE expression with parameter
backported change#1593495 from trunk to 10.10 branch.
Make sure the result of a CASE expression is nullable if (and only if)
at least one of the result expressions is nullable.
> Incorrect nullability for CASE expression with parameter
> --------------------------------------------------------
>
> Key: DERBY-6567
> URL: https://issues.apache.org/jira/browse/DERBY-6567
> Project: Derby
> Issue Type: Bug
> Components: SQL
> Affects Versions: 10.10.2.0
> Reporter: Knut Anders Hatlen
> Assignee: Mike Matrigali
> Fix For: 10.11.1.1
>
> Attachments: d6567-1a.diff
>
>
> This JUnit test code fails because it detects that the query returns null
> even though the result column is reported as not nullable:
> {code}
> PreparedStatement ps = prepareStatement(
> "values case when false then 1 else ? end");
> ps.setNull(1, Types.INTEGER);
> JDBC.assertSingleValueResultSet(ps.executeQuery(), null);
> {code}
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