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    <title>MongoDB Jira</title>
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    <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-3103] key check optimization for multikey index in covered matcher</title>
                <link>https://jira.mongodb.org/browse/SERVER-3103</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;There are some optimizations we could implement to reduce the number of document lookups for certain queries on multikey indexes.&lt;/p&gt;</description>
                <environment></environment>
        <key id="17141">SERVER-3103</key>
            <summary>key check optimization for multikey index in covered matcher</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="4">Incomplete</resolution>
                                        <assignee username="david.storch@mongodb.com">David Storch</assignee>
                                    <reporter username="aaron">Aaron Staple</reporter>
                        <labels>
                    </labels>
                <created>Mon, 16 May 2011 18:42:40 +0000</created>
                <updated>Wed, 28 Jan 2015 20:31:23 +0000</updated>
                            <resolved>Wed, 28 Jan 2015 20:31:23 +0000</resolved>
                                                                    <component>Querying</component>
                                        <votes>4</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="200656" author="auto" created="Tue, 27 Nov 2012 23:15:24 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-11-27T23:14:34Z&apos;, u&apos;email&apos;: u&apos;eliot@10gen.com&apos;, u&apos;name&apos;: u&apos;Eliot Horowitz&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-3103&quot; title=&quot;key check optimization for multikey index in covered matcher&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-3103&quot;&gt;&lt;del&gt;SERVER-3103&lt;/del&gt;&lt;/a&gt; : copyright&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/fa81ee399244f6f844f085870af13386ed09c680&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/fa81ee399244f6f844f085870af13386ed09c680&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="200655" author="auto" created="Tue, 27 Nov 2012 23:15:22 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-11-27T22:33:00Z&apos;, u&apos;email&apos;: u&apos;eliot@10gen.com&apos;, u&apos;name&apos;: u&apos;Eliot Horowitz&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-3103&quot; title=&quot;key check optimization for multikey index in covered matcher&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-3103&quot;&gt;&lt;del&gt;SERVER-3103&lt;/del&gt;&lt;/a&gt; multi-key indexes and covered indexes work for very simple equality case&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/41a8fc30d20d08a65630ad41630988ba0b52c40d&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/41a8fc30d20d08a65630ad41630988ba0b52c40d&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="33151" author="auto" created="Tue, 17 May 2011 20:10:58 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;login&apos;: u&apos;astaple&apos;, u&apos;name&apos;: u&apos;Aaron&apos;, u&apos;email&apos;: u&apos;aaron@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-3103&quot; title=&quot;key check optimization for multikey index in covered matcher&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-3103&quot;&gt;&lt;del&gt;SERVER-3103&lt;/del&gt;&lt;/a&gt; remove placeholder code&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/ae7cf9b73638ddf482b62a7151f23691c1ebae72&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/ae7cf9b73638ddf482b62a7151f23691c1ebae72&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="11692">SERVER-958</issuekey>
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