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From "Bryan Pendleton (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DERBY-6904) Enhance ALTER TABLE to allow CYCLE option to be changed.
Date Mon, 06 Mar 2017 01:10:32 GMT

    [ https://issues.apache.org/jira/browse/DERBY-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15896627#comment-15896627
] 

Bryan Pendleton commented on DERBY-6904:
----------------------------------------

Super! I think this is a great project to use to learn more about the internals of the Derby
code!

In addition to the two tasks you mention, we will also want to write some new tests for
the test suites to include the various syntax cases, both correct syntax and error cases.


> 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
>            Priority: Minor
>
> 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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