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https://issues.apache.org/jira/browse/DERBY-6905?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16033789#comment-16033789
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ASF subversion and git services commented on DERBY-6905:
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Commit 1797283 from [~bryanpendleton] in branch 'code/trunk'
[ https://svn.apache.org/r1797283 ]
DERBY-6903: ALTER TABLE ALTER COLUMN resets CYCLE option
DERBY-6904: Enhance ALTER TABLE to allow CYCLE option to be changed
DERBY-6905: Enhance SYS.SYSCOLUMNS to report the CYCLE value
DERBY-6906: Allow a GENERATED column to explicitly specify NO CYCLE
This patch was contributed by Harshvardhan Gupta (harshvardhan145 at gmail dot
com)
The patch adds the CYCLE property as a fundamental property associated
with a column similar to current increment value, current increment step etc.
* SYS.SYSCOLUMNS extended to hold the cycle value of identity column.
* Extended the grammar to accept "cycle","no cycle" in alter clause
and changed the underlying column descriptor and sequencing objects.
* ALTER clause not involving cycle option (i.e increment and restart)
won't affect the cycle option.
The code flow for the upgrade handling was modelled after Derby-534
for introducing a new in column SYSTRIGGERS. There are new behaviors
for SYSCOLUMNS in both soft- and hard-upgrade scenarios.
> Enhance SYS.SYSCOLUMNS to report the CYCLE value for an IDENTITY column
> -----------------------------------------------------------------------
>
> Key: DERBY-6905
> URL: https://issues.apache.org/jira/browse/DERBY-6905
> Project: Derby
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 10.13.1.0
> Reporter: Bryan Pendleton
> Assignee: Harshvardhan Gupta
> Priority: Minor
>
> DERBY-6542 changed IDENTITY columns to build upon the underlying
> SEQUENCE objects. SEQUENCE objects can have a CYCLE option
> set for them, and as of DERBY-6852, the CYCLE option controls the
> behavior of the IDENTITY column that uses that SEQUENCE.
> It would be nice if SYS.SYSCOLUMNS would report the CYCLE option
> that is in effect for a IDENTITY column in that column's row in SYSCOLUMNS.
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