[
https://issues.apache.org/jira/browse/DERBY-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15907498#comment-15907498
]
Bryan Pendleton commented on DERBY-6904:
----------------------------------------
Thanks for all the work on this!
I shall try to find some time to download your patches and see if I can observe
the same results that you do.
There is an upgrade process in Derby, and I agree with you that it seems like
it is not succeeding to upgrade the database properly to be aware of the
changed columns in SYSCOLUMNS.
I shall have to do some study to understand why the upgrade isn't occurring as
you expect. The upgrade is supposed to be automatic based on the version number
of the database, but perhaps there is an upgrade function that we will need to
code to make the change to SYSCOLUMNS.
Or it may be more delicate because SYSCOLUMNS is a particularly sensitive core
table.
I suppose, as an experiment, you could back out just the SYSCOLUMNS portion of
your patch, leaving all the other aspects in place, and see how the various
test suites behavior in that scenario?
> 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
> Attachments: 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.
--
This message was sent by Atlassian JIRA
(v6.3.15#6346)
