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https://issues.apache.org/jira/browse/DERBY-6644?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14051153#comment-14051153
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ASF subversion and git services commented on DERBY-6644:
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Commit 1607559 from [~knutanders] in branch 'code/trunk'
[ https://svn.apache.org/r1607559 ]
DERBY-6644: Support standard syntax for altering column nullability
Implement SQL:2011 syntax for altering nullability:
ALTER TABLE t ALTER COLUMN c SET NOT NULL
ALTER TABLE t ALTER COLUMN c DROP NOT NULL
> Support standard syntax for altering column nullability
> -------------------------------------------------------
>
> Key: DERBY-6644
> URL: https://issues.apache.org/jira/browse/DERBY-6644
> Project: Derby
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 10.11.0.0
> Reporter: Knut Anders Hatlen
> Assignee: Knut Anders Hatlen
> Priority: Minor
> Attachments: d6644-1a.diff
>
>
> Derby supports altering the nullability of a column via an ALTER TABLE
> statement, but the supported syntax is different from what the SQL:2011
> standard defines. We should add support for the standard syntax as well.
> The standard syntax is
> ALTER TABLE t ALTER COLUMN c SET NOT NULL
> ALTER TABLE t ALTER COLUMN c DROP NOT NULL
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