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https://issues.apache.org/jira/browse/DERBY-4006?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12663954#action_12663954
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Bryan Pendleton commented on DERBY-4006:
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Submitted the 10.4 change as revision 734585.
Is there a need to merge this change to other branches? I'm satisfied having
committed the fix to the trunk and to the 10.4 branch, so I propose to resolve
this issue at this point. Please let me know if you think more work is necessary
at this time.
> ALTER COLUMN ... WITH DEFAULT NULL does not change the default
> --------------------------------------------------------------
>
> Key: DERBY-4006
> URL: https://issues.apache.org/jira/browse/DERBY-4006
> Project: Derby
> Issue Type: Bug
> Components: SQL
> Affects Versions: 10.2.2.0, 10.3.1.4, 10.3.2.1, 10.3.3.0, 10.4.1.3,
> 10.4.2.0
> Reporter: Knut Anders Hatlen
> Assignee: Bryan Pendleton
> Attachments: addGenColTest.diff, patchWithTest.diff,
> quickCodePatch.diff, tenFourPatch.diff
>
>
> Reported on derby-user.
> http://mail-archives.apache.org/mod_mbox/db-derby-user/200901.mbox/%[email protected]%3e
> ij> create table t (x varchar(5) default 'abc');
> 0 rows inserted/updated/deleted
> ij> alter table t alter column x with default null;
> 0 rows inserted/updated/deleted
> ij> insert into t values default;
> 1 row inserted/updated/deleted
> ij> select * from t;
> X
> -----
> abc
> 1 row selected
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