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            <title>[SERVER-4468] Keep track of multi-key fields in index</title>
                <link>https://jira.mongodb.org/browse/SERVER-4468</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;We can keep track of which fields have array values in a multi-key index; this would be used to optimize certain operations &amp;#8211; see linked issues.&lt;/p&gt;</description>
                <environment></environment>
        <key id="26370">SERVER-4468</key>
            <summary>Keep track of multi-key fields in index</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="3">Duplicate</resolution>
                                        <assignee username="david.storch@mongodb.com">David Storch</assignee>
                                    <reporter username="scotthernandez">Scott Hernandez</reporter>
                        <labels>
                    </labels>
                <created>Sat, 10 Dec 2011 17:08:47 +0000</created>
                <updated>Thu, 16 Jun 2016 21:57:51 +0000</updated>
                            <resolved>Thu, 16 Jun 2016 21:57:48 +0000</resolved>
                                                                    <component>Index Maintenance</component>
                                        <votes>1</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="1297266" author="david.storch" created="Thu, 16 Jun 2016 21:57:43 +0000"  >&lt;p&gt;This was implemented under &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-15086&quot; title=&quot;Allow for efficient range queries over non-array fields in multikey indices&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-15086&quot;&gt;&lt;del&gt;SERVER-15086&lt;/del&gt;&lt;/a&gt;. Closing as a dup.&lt;/p&gt;</comment>
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