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From "Dag H. Wanvik (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-2487) Enhance Derby with EXPLAIN Functionality
Date Tue, 24 Feb 2009 22:40:02 GMT

    [ https://issues.apache.org/jira/browse/DERBY-2487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12676441#action_12676441
] 

Dag H. Wanvik commented on DERBY-2487:
--------------------------------------

For roles, I added the above (Mike's quote) upgrade code as part of
DERBY-3191.  To avoid confusion, 10.4 databases has the system table
SYS.SYSROLES, but the feature isn't enabled until 10.5, however.


> Enhance Derby with EXPLAIN Functionality
> ----------------------------------------
>
>                 Key: DERBY-2487
>                 URL: https://issues.apache.org/jira/browse/DERBY-2487
>             Project: Derby
>          Issue Type: New Feature
>          Components: SQL
>    Affects Versions: 10.2.2.0
>            Reporter: Felix Beyer
>            Assignee: Bryan Pendleton
>            Priority: Minor
>         Attachments: Derby physical XPLAIN schema.png, incorporateTrunkChanges.diff,
RSProtocolNew.pdf, rts.xls, small logical xplain schema.pdf, startRegressionTest.diff, startRegressionTest.diff,
updateRegressionTests.diff, updateRegressionTests.diff, usage.txt, xplain_patch_v1.txt, xplainClasses.pdf
>
>
> This enhancement extends Derby with EXPLAIN functions. Users want to have more feedback
than they`re getting with the current RuntimeStatistics facility. This extension is based
on the RuntimeStatistics/ResultSetStatistics functions / classes. 

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