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    <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-12470] document and audit multikey bounds behavior</title>
                <link>https://jira.mongodb.org/browse/SERVER-12470</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Our documentation on multikey behavior and bounds creation is incomplete.  Also our bounds w/the new planner are probably not as tight as they could be.&lt;/p&gt;</description>
                <environment></environment>
        <key id="107537">SERVER-12470</key>
            <summary>document and audit multikey bounds behavior</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</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="david.storch@mongodb.com">David Storch</assignee>
                                    <reporter username="hari.khalsa@10gen.com">hari.khalsa@10gen.com</reporter>
                        <labels>
                    </labels>
                <created>Fri, 24 Jan 2014 17:40:40 +0000</created>
                <updated>Mon, 11 Jul 2016 17:18:05 +0000</updated>
                            <resolved>Wed, 12 Feb 2014 18:33:02 +0000</resolved>
                                                    <fixVersion>2.6.0-rc0</fixVersion>
                                    <component>Index Maintenance</component>
                    <component>Querying</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="496629" author="xgen-internal-githook" created="Mon, 10 Feb 2014 21:40:29 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;dstorch&apos;, u&apos;name&apos;: u&apos;David Storch&apos;, u&apos;email&apos;: u&apos;david.storch@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-12470&quot; title=&quot;document and audit multikey bounds behavior&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-12470&quot;&gt;&lt;del&gt;SERVER-12470&lt;/del&gt;&lt;/a&gt; &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-12475&quot; title=&quot;Query on compound multi-key indexes lost performance between 2.4.6 and 2.5.5-pre-&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-12475&quot;&gt;&lt;del&gt;SERVER-12475&lt;/del&gt;&lt;/a&gt; &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-9532&quot; title=&quot;incorrect elemMatch bounds for multi key compound index&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-9532&quot;&gt;&lt;del&gt;SERVER-9532&lt;/del&gt;&lt;/a&gt; fix multikey index bounds for compound indices and elemMatch&lt;/p&gt;

&lt;p&gt;The new query system multikey index bounds behavior now largely matches that of 2.4.&lt;br/&gt;
For a detailed description of the rules for building multikey index bounds, see&lt;br/&gt;
the long comment atop db/query/planner_access.h.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/bbca96a512c580f13e044eeb7de15132fb3ce193&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/bbca96a512c580f13e044eeb7de15132fb3ce193&lt;/a&gt;&lt;/p&gt;</comment>
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                <issuelinks>
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                                            <outwardlinks description="related to">
                                        <issuelink>
            <issuekey id="107578">SERVER-12475</issuekey>
        </issuelink>
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                                                                <inwardlinks description="is related to">
                                        <issuelink>
            <issuekey id="59632">SERVER-7959</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="105000">SERVER-12281</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="110275">DOCS-2703</issuekey>
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