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https://issues.apache.org/jira/browse/DERBY-6903?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16045543#comment-16045543
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Bryan Pendleton commented on DERBY-6903:
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We've completed all our planned work for this item.
> ALTER TABLE ALTER COLUMN resets CYCLE option of IDENTITY column
> ---------------------------------------------------------------
>
> Key: DERBY-6903
> URL: https://issues.apache.org/jira/browse/DERBY-6903
> Project: Derby
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 10.13.1.0
> Reporter: Bryan Pendleton
> Assignee: Harshvardhan Gupta
> Priority: Minor
> Fix For: 10.14.0.0
>
>
> Using ALTER TABLE with the SET INCREMENT BY or SET RESTART WITH
> options to make a change to a GENERATED ... BY IDENTITY column resets the
> CYCLE option of that column to "off".
> Some test cases demonstrating this behavior were added as part of
> the DERBY-6852 change revision 1756287
> The problem occurs when the ALTER TABLE code drops and recreates
> the underlying SEQUENCE object, and does not preserve the CYCLE
> option of the underlying SEQUENCE object.
> I believe the correct behavior would be for the ALTER TABLE code
> to read the current CYCLE option of the underlying SEQUENCE object
> first, and then create the new SEQUENCE object with the same value
> for the CYCLE option.
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