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https://issues.apache.org/jira/browse/DERBY-2487?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bryan Pendleton updated DERBY-2487:
-----------------------------------
Attachment: refactorVisitor.diff
Attached slightly updated copy of refactorVisitor.diff:
- the patch now makes a first-order check for the correct 'shape' of the XPLAIN
tables when the user calls SET_XPLAIN_SCHEMA.
- there's now a test case which verifies the behavior when a table with a
non-matching shape is present when SET_XPLAIN_SCHEMA is called.
> 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, refactorVisitor.diff, refactorVisitor.diff,
> removeSourceDepth.diff, RSProtocolNew.pdf, rts.xls, small logical xplain
> schema.pdf, startRegressionTest.diff, startRegressionTest.diff,
> startUpgradeTests.diff, updateRegressionTests.diff,
> updateRegressionTests.diff, usage.txt, userSchemaPrototyping.diff,
> userSchemaPrototyping.diff, userSchemaPrototyping.diff, 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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