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From "C.S. Nirmal J. Fernando (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-4587) Add tools for improved analysis and understanding of query plans and execution statistics
Date Thu, 05 Aug 2010 15:01:17 GMT

    [ https://issues.apache.org/jira/browse/DERBY-4587?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12895705#action_12895705
] 

C.S. Nirmal J. Fernando commented on DERBY-4587:
------------------------------------------------

Hi Bryan,

Thanks for committing this! Yeah, I think we should keep this issue open for sometime 
till we get some feedback on how it works. 

Thanks Bryan for all the help you provided, and for your wonderful thought about this kind
of a tool.

PS: Bryan don't you think that we should commit the documentation patch too?

Thanks

> Add tools for improved analysis and understanding of query plans and execution statistics
> -----------------------------------------------------------------------------------------
>
>                 Key: DERBY-4587
>                 URL: https://issues.apache.org/jira/browse/DERBY-4587
>             Project: Derby
>          Issue Type: Improvement
>          Components: SQL, Tools
>            Reporter: Bryan Pendleton
>            Assignee: C.S. Nirmal J. Fernando
>         Attachments: AdavancedXSL-mouseover.jpg, advancedViewXSL.xsl, advancedViewXSL.xsl,
advancedViewXSL2.xsl, advancedXSL-1.jpg, advancedXSL-2.jpg, advancedXSL-3.jpg, basic_html-2.2.jpg,
basic_html-2.3.jpg, basic_html-2.jpg, basic_html-3.jpg, basic_html-4.1.jpg, basic_html-4.2.jpg,
Derby Query Plan Screen Shot 2.jpg, DERBY-4587-tool-2.diff, DERBY-4587-tool-3.diff, DERBY-4587-tool-4.diff,
DERBY-4587-tool-5.diff, DERBY-4587-tool-6.diff, DERBY-4587-tool-7-b.diff, DERBY-4587-tool-7.diff,
DERBY-4587-tool-8.diff, DERBY-4587-tool-9.1.diff, DERBY-4587-tool-9.2.diff, DERBY-4587-tool-9.3.diff,
DERBY-4587-tool-9.4.diff, DERBY-4587-tool-9.5.diff, DERBY-4587-tool-9.6.diff, DERBY-4587-tool-9.7.diff,
DERBY-4587-tool-9.diff, DERBY-4587-tool-test1.diff, DERBY-4587-tool-test2.diff, DERBY-4587-tool.diff,
derby-logo.png, Derby_Query_Plan_Screen_Shot.jpg, PostgreSQL license.jpg, Read_Me.txt, screenshot-1.jpg,
screenshot-2.jpg, screenshot-3.jpg, Simple HTML View (Pure XSL).jpg, Source.rar, test.xml,
test4.xsl, vanilla_html.xsl, vanilla_html.xsl, vanilla_html.xsl, vanilla_html.xsl, vanilla_html.xsl,
xml_doc_screenshot.jpg, xml_doc_screenshot.jpg
>
>
> I think it would be great to see some work in the area of tools for helping
> with the analysis of complex query execution. Quite frequently, users of
> Derby have trouble comprehending (a) how their query is being translated
> into a query plan by the optimizer, and (b) what the execution-time resource
> usage of the various parts of the query is.
> There are low-level features in Derby which capture this information and
> record it, such as logQueryPlan, and the XPLAIN tables, but there is a lot
> of opportunity for designing higher-level tools which can process the query
> plan and execution statistics information and present it in a more
> comprehensible fashion. 

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