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From "Bryan Pendleton (JIRA)" <j...@apache.org>
Subject [jira] Updated: (DERBY-2487) Enhance Derby with EXPLAIN Functionality
Date Fri, 20 Feb 2009 04:04:03 GMT

     [ https://issues.apache.org/jira/browse/DERBY-2487?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Bryan Pendleton updated DERBY-2487:

    Attachment: startRegressionTest.diff

Attached 'startRegressionTest.diff' patch differs in two
meaningful respects from the previous patch:
 - it incorporates the workaround that Knut suggested
   for DERBY-4062; namely, to directly construct SQLInteger
   objects for the integer data values rather than calling
   DataValueFactory.getDataValue(). This seems like a
   reasonable approach to me, and means that this work won't
   be blocked while we discuss the preferred approach to
   take with DERBY-4062.
 - it includes an initial, incomplete, partial new regression test
   to be run as part of the derbylang junit test suites. At this
   point, I'm just writing the most simple tests of the new
   feature, trying to ensure that in some straightforward
   scenarios, reasonable values are captured and written
   to the new system tables. So far, this testing seems to be
   going well and I think it should be possible to continue
   adding additional regression tests along these lines to this suite.

I haven't re-run the full regression suite in a while, so it's possible
that this patch breaks some of the tests, although hopefully not
since I haven't done much to the patch other than the two changes
mentioned above.

> 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:
>            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, 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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