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https://issues.apache.org/jira/browse/DERBY-3888?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13867773#comment-13867773
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Rick Hillegas commented on DERBY-3888:
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Hi Ari,
You can boost the visibility of this enhancement by voting for it. Thanks.
> ALTER TABLE ... ADD COLUMN cannot add identity columns
> ------------------------------------------------------
>
> Key: DERBY-3888
> URL: https://issues.apache.org/jira/browse/DERBY-3888
> Project: Derby
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 10.4.2.0
> Reporter: Knut Anders Hatlen
> Priority: Minor
> Labels: derby_triage10_10
>
> ALTER TABLE .. ADD COLUMN cannot be used to add an identity column. There is
> code to handle identity columns, but it is disabled in the parser. See this
> thread on derby-user:
> http://mail-archives.apache.org/mod_mbox/db-derby-user/200708.mbox/%[email protected]%3E
> The code was disabled for DB2 compatibility. Since DB2 compatibility is not a
> goal for Derby, we should see if we could re-enable it.
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