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https://issues.apache.org/jira/browse/DERBY-2487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12484304
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Bryan Pendleton commented on DERBY-2487:
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1) If multiple people are simultaneously using explain mode to store query
plans into
the system catalogs, how do they distinguish their explain data from each other?
2) If I use explain mode for multiple SQL statements, how do I go back in after
the
fact and find the particular explain data for the particular SQL statement that
I'm interested in?
> 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
> Priority: Minor
> Attachments: Derby physical XPLAIN schema.png, RSProtocolNew.pdf,
> rts.xls, small logical xplain schema.pdf, 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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