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From "Bryan Pendleton (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-4587) Add tools for improved analysis and understanding of query plans and execution statistics
Date Tue, 20 Jul 2010 02:38:50 GMT

    [ https://issues.apache.org/jira/browse/DERBY-4587?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12890140#action_12890140
] 

Bryan Pendleton commented on DERBY-4587:
----------------------------------------

I successfully built after I did the following:
1) Edited my ant.properties to remove j14lib and j15lib, leaving only jdk16
2) Removed my GCJ installation(s) from my machine, so that JDK 1.6 was 
the only JDK available to the build

This confirms Nirmal's observation that the build is successful in a pure JDK 1.6 environment


> 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: 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.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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