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https://issues.apache.org/jira/browse/DERBY-2487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12680511#action_12680511
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Rick Hillegas commented on DERBY-2487:
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Hi Bryan,
I would be tempted to not worry much about synonyms and views. It's true, those
edge-cases could arise but I think the probability is very low, the negative
consequences are slight, and the workaround is easy (turn off plan-gathering
until you understand what's broken). I don't think you have to worry about
schema mismatch for this first increment--the person who wants to change the
shape of these tables can work through those issues later on.
> 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, removeSourceDepth.diff, RSProtocolNew.pdf,
> rts.xls, small logical xplain schema.pdf, startRegressionTest.diff,
> startRegressionTest.diff, startUpgradeTests.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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