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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-36183] collection.getIndexes() should display multikey metadata</title>
                <link>https://jira.mongodb.org/browse/SERVER-36183</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;MongoDB 3.6 introduces compatibility changes regarding the ability of a multikey index to be used in sorting (&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-15086&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;https://jira.mongodb.org/browse/SERVER-15086&lt;/a&gt;). To summarize:&lt;/p&gt;

&lt;p&gt;In MongoDB 3.6:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;A version 1 (or earlier) multikey index (MongoDB 3.2 and earlier) cannot be used to sort&lt;/li&gt;
	&lt;li&gt;A version 2 multikey index (MongoDB 3.4, 3.6) can be used to sort, provided that the sort field is not an array.&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;Given the performance implications, and that the indexes already contain this information, collection.getIndexes() should:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;Display the index metadata identifying if an index is&#160;multikey&lt;/li&gt;
	&lt;li&gt;If a `v: 2`, show the path level multikey data for any multikey indexes&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="572965">SERVER-36183</key>
            <summary>collection.getIndexes() should display multikey metadata</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="backlog-server-query">Backlog - Query Team</assignee>
                                    <reporter username="adamaharrison@gmail.com">Adam Harrison</reporter>
                        <labels>
                    </labels>
                <created>Wed, 18 Jul 2018 17:27:00 +0000</created>
                <updated>Tue, 6 Dec 2022 03:23:46 +0000</updated>
                            <resolved>Fri, 27 Jul 2018 15:22:35 +0000</resolved>
                                    <version>3.4.0</version>
                    <version>3.6.0</version>
                                                    <component>Querying</component>
                                        <votes>0</votes>
                                    <watches>8</watches>
                                                                                                                <comments>
                            <comment id="1958583" author="ian@10gen.com" created="Fri, 27 Jul 2018 15:22:35 +0000"  >&lt;p&gt;Thanks for reporting Adam.  We&apos;re closing as dupe of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-7566&quot; title=&quot;simpler way to figure out if an index is multikey&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-7566&quot;&gt;SERVER-7566&lt;/a&gt; - please feel free to vote and watch that ticket.  Note that the best solution to this might not entail changes to getIndexes but we believe that ticket tracks the work to more simply determine the multikey metadata.&lt;/p&gt;</comment>
                            <comment id="1956557" author="nick.brewer" created="Wed, 25 Jul 2018 18:30:46 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=adamaharrison%40gmail.com&quot; class=&quot;user-hover&quot; rel=&quot;adamaharrison@gmail.com&quot;&gt;adamaharrison@gmail.com&lt;/a&gt; Thanks for your suggestion - I&apos;m passing this along to our Query team as a feature request. &lt;/p&gt;

&lt;p&gt;-Nick&lt;/p&gt;</comment>
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