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Posted to derby-dev@db.apache.org by "Bryan Pendleton (JIRA)" <ji...@apache.org> on 2017/05/25 05:46:04 UTC
[jira] [Commented] (DERBY-6904) Enhance ALTER TABLE to allow CYCLE
option to be changed.
[ https://issues.apache.org/jira/browse/DERBY-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16024228#comment-16024228 ]
Bryan Pendleton commented on DERBY-6904:
----------------------------------------
Thank you for the upgraded patch! I will spend some time this weekend studying the changes you have attached.
> Enhance ALTER TABLE to allow CYCLE option to be changed.
> --------------------------------------------------------
>
> Key: DERBY-6904
> URL: https://issues.apache.org/jira/browse/DERBY-6904
> Project: Derby
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 10.13.1.0
> Reporter: Bryan Pendleton
> Assignee: Harshvardhan Gupta
> Priority: Minor
> Attachments: 6904_2.diff, 6904_3.diff, 6904.diff, columnMismatch, compareDbName
>
>
> It would be nice to have a variant of the ALTER TABLE statement,
> similar to the SET INCREMENT BY or SET RESTART WITH variants,
> that allowed a user to change the CYCLE option on an IDENTITY column.
> I think that the code flow for this could be closely modelled on the
> code flow for the SET INCREMENT BY variant: after the statement
> is parsed, we simply need to drop and recreate the underlying SEQUENCE
> object with the desired CYCLE option (and preserving all the other
> aspects of the underlying SEQUENCE object.
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