You are viewing a plain text version of this content. The canonical link for it is here.
Posted to derby-dev@db.apache.org by "Mike Matrigali (JIRA)" <ji...@apache.org> on 2012/09/12 19:18:07 UTC
[jira] [Commented] (DERBY-5493) Same value returned by successive
calls to a sequence generator.
[ https://issues.apache.org/jira/browse/DERBY-5493?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13454137#comment-13454137 ]
Mike Matrigali commented on DERBY-5493:
---------------------------------------
I think we don't want to backport this. To alleviate the performance issue created by this issue and DERBY-5494 the preallocation behavior was changed.
> Same value returned by successive calls to a sequence generator.
> ----------------------------------------------------------------
>
> Key: DERBY-5493
> URL: https://issues.apache.org/jira/browse/DERBY-5493
> Project: Derby
> Issue Type: Bug
> Components: SQL
> Affects Versions: 10.6.1.0, 10.6.2.1, 10.7.1.1, 10.8.1.2, 10.8.2.2, 10.9.1.0
> Reporter: Rick Hillegas
> Assignee: Rick Hillegas
> Labels: derby_backport_reject_10_8, derby_triage10_9
> Fix For: 10.9.1.0
>
> Attachments: derby-5493-01-aa-correctnessPlusPeekerPlusTest.diff, derby-5493-01-ad-simplerApproach.diff, derby-5493-01-ae-simplerApproachWithCrashJUnitTest.diff, derby-5493-01-af-usersubtran.diff, derby-5493-01-ag-mergedWith5494.diff, derby-5493-02-aa-boostPreallocationTo100.diff, releaseNote.html
>
>
> The following script shows the same value being returned from a sequence generator by two successive NEXT VALUE FOR calls. Thanks to Knut for finding this:
> connect 'jdbc:derby:memory:db;create=true';
> create table t (x int);
> create sequence s;
> autocommit off;
> select count(*) from sys.syssequences with rs;
> values next value for s;
> drop table t;
> rollback;
> -- same value as previous call
> values next value for s;
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira