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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-11889] Add new plan stats to explain output</title>
                <link>https://jira.mongodb.org/browse/SERVER-11889</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;b&gt;Problem:&lt;/b&gt;&lt;br/&gt;
The PlanStage class provides a getStats() method to allow the derived classes (e.g. index_scan, collection_scan etc.) to collect statistics about their specific execution.&lt;/p&gt;

&lt;p&gt;The various runners (SingleSolution, CachedRunner etc.) call getStats() in the getExplainPlan implementation. However, the details collection by each concrete implementation are not projected in the explain plan.&lt;/p&gt;

&lt;p&gt;This could provide core development/debug information as well as help customer support scenarios.&lt;/p&gt;

&lt;p&gt;&lt;b&gt;Solution:&lt;/b&gt;&lt;br/&gt;
Enable the dumping out of the getStats() output into the explain plan.&lt;/p&gt;

&lt;p&gt;To view the stats from the shell, use &lt;tt&gt;db.col.find().explain(true)&lt;/tt&gt;&lt;/p&gt;

&lt;p&gt;&lt;b&gt;Workaround:&lt;/b&gt;&lt;br/&gt;
None.&lt;/p&gt;</description>
                <environment></environment>
        <key id="100343">SERVER-11889</key>
            <summary>Add new plan stats to explain output</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="9">Done</resolution>
                                        <assignee username="hari.khalsa@10gen.com">hari.khalsa@10gen.com</assignee>
                                    <reporter username="alvin">Alvin Richards</reporter>
                        <labels>
                            <label>26qa</label>
                            <label>explain</label>
                            <label>nqf</label>
                            <label>query_triage</label>
                    </labels>
                <created>Wed, 27 Nov 2013 22:45:56 +0000</created>
                <updated>Wed, 28 Oct 2015 04:26:23 +0000</updated>
                            <resolved>Mon, 13 Jan 2014 18:31:03 +0000</resolved>
                                    <version>2.5.4</version>
                                    <fixVersion>2.5.5</fixVersion>
                                    <component>Querying</component>
                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="485159" author="xgen-internal-githook" created="Tue, 21 Jan 2014 20:45:49 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;monkey101&apos;, u&apos;name&apos;: u&apos;Dan Pasette&apos;, u&apos;email&apos;: u&apos;dan@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-11889&quot; title=&quot;Add new plan stats to explain output&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-11889&quot;&gt;&lt;del&gt;SERVER-11889&lt;/del&gt;&lt;/a&gt; only show stats field in shell with verbose explain&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/6d460f440dbe30fae04663771db8c9c9bbe79779&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/6d460f440dbe30fae04663771db8c9c9bbe79779&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="481109" author="xgen-internal-githook" created="Mon, 13 Jan 2014 18:30:16 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;hkhalsa&apos;, u&apos;name&apos;: u&apos;Hari Khalsa&apos;, u&apos;email&apos;: u&apos;hkhalsa@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-11889&quot; title=&quot;Add new plan stats to explain output&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-11889&quot;&gt;&lt;del&gt;SERVER-11889&lt;/del&gt;&lt;/a&gt; add full stats tree to explain, cobble something together for ixisect explain&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/ff9150f79740233c21c658cd368a3255bba0d400&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/ff9150f79740233c21c658cd368a3255bba0d400&lt;/a&gt;&lt;/p&gt;</comment>
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