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https://issues.apache.org/jira/browse/DERBY-4587?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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C.S. Nirmal J. Fernando updated DERBY-4587:
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Attachment: DERBY-4587-tool-5.diff
Hi All,
This patch (DERBY-4587-tool-5.diff) is providing the functionality of emitting
a more detailed "XML file" using the new tool. As an example, following is a
part extracted after generating a XML file, using this patch:
<plan>
<details>
<image>projection.jpg</image>
<node>PROJECTION</node>
<id>29d8c03e-0128-e492-0a47-00000035b7e8</id>
<depth>0</depth>
<parent_id>null</parent_id>
<input_rows> null</input_rows>
<returned_rows> # of Rows Returned= 4</returned_rows>
<no_opens> # of Opens= 1</no_opens>
<visited_pages> null</visited_pages>
<scan_qualifiers> null</scan_qualifiers>
<next_qualifiers> null</next_qualifiers>
</details>
<details>
<arrow>arrow.jpg</arrow>
<image>lohashjoin.jpg</image>
<node>LOHASHJOIN</node>
<id>8a184042-0128-e492-0a47-00000035b7e8</id>
<depth>1</depth>
<parent_id>29d8c03e-0128-e492-0a47-00000035b7e8</parent_id>
<input_rows> null</input_rows>
<returned_rows> # of Rows Returned= 4</returned_rows>
<no_opens> # of Opens= 1</no_opens>
<visited_pages> null</visited_pages>
<scan_qualifiers> null</scan_qualifiers>
<next_qualifiers> null</next_qualifiers>
</details>
.................................................................................
...........................................
You can start the new tool like this:
C:\OtherNirmal\GSoC\Code\jars\sane>java
org.apache.derby.tools.ExportQueryPlanAsXML jdbc:derby:nirmal username password
MYSCHEMA b9810038-0128-e492-0a47-00000035b7e8 name_of_the_xml_file
MYSCHEMA - schema you specified when taking statistics
b9810038-0128-e492-0a47-00000035b7e8 - is the STMT_ID in SYSXPLAIN_STATEMENTS
table
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: 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.diff,
> Derby_Query_Plan_Screen_Shot.jpg, PostgreSQL license.jpg, Read_Me.txt,
> screenshot-1.jpg, screenshot-2.jpg, screenshot-3.jpg, Source.rar, test.xml,
> test4.xsl
>
>
> 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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