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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-84912] Review MongoDB Manual Page /manual/reference/operator/query/exists/</title>
                <link>https://jira.mongodb.org/browse/SERVER-84912</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Hello,&lt;/p&gt;

&lt;p&gt;To ensure that the documentation remains accurate and up to date, we&apos;re asking a group of engineers and solutions architects to review content from the MongoDB Manual to ensure that the content is accurate, addresses the core consideration of potential users, and presents sensible recommendations.&lt;/p&gt;

&lt;p&gt;This issue addresses the &lt;b&gt;single&lt;/b&gt; page:&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;http://docs.mongodb.org/manual/reference/operator/query/exists/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://docs.mongodb.org/manual/reference/operator/query/exists/&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;As you review the documentation, consider four major dimensions:&lt;/p&gt;

&lt;p&gt;1. The correctness and completeness of the content.&lt;/p&gt;

&lt;p&gt;2. The utility of the content for &lt;b&gt;new users&lt;/b&gt; of MongoDB.&lt;/p&gt;

&lt;p&gt;3. The utility of the content for &lt;b&gt;expert users&lt;/b&gt; of MongoDB.&lt;/p&gt;

&lt;p&gt;4. The organization of the page and its focus on the important aspects of the content.&lt;/p&gt;

&lt;p&gt;When you complete your review of the page please fill out the &lt;a href=&quot;https://www.research.net/s/K9QMJVF?c=1d28a23df2d12b14f182075bbe2234c0&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;documentation audit survey&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;If you have additional questions or would like to make additional changes, please create a &lt;a href=&quot;https://jira.mongodb.org/secure/CreateIssueDetails!init.jspa?pid=10380&amp;amp;issuetype=4&amp;amp;priority=4&amp;amp;summary=Suggestion+for+%2Fmanual%2Freference%2Foperator%2Fquery%2Fexists%2F&amp;amp;reporter=david.storch&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;DOCS ticket&lt;/a&gt; or leave a comment on this ticket.&lt;/p&gt;

&lt;p&gt;Thank you for your time and effort, and for your help in improving the documentation.&lt;/p&gt;

&lt;p&gt;Regards,&lt;/p&gt;

&lt;p&gt;the docs team&lt;/p&gt;</description>
                <environment></environment>
        <key id="108673">SERVER-84912</key>
            <summary>Review MongoDB Manual Page /manual/reference/operator/query/exists/</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</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="kay.kim@mongodb.com">Kay Kim</reporter>
                        <labels>
                            <label>audit-2014</label>
                            <label>audit-content</label>
                            <label>audit-nav</label>
                    </labels>
                <created>Fri, 31 Jan 2014 16:33:43 +0000</created>
                <updated>Fri, 12 Jan 2024 02:54:15 +0000</updated>
                            <resolved>Tue, 25 Feb 2014 15:56:44 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="491701" author="david.storch" created="Fri, 31 Jan 2014 19:49:59 +0000"  >&lt;p&gt;My audit of the page is complete; reassigning to Kay per my comment above.&lt;/p&gt;</comment>
                            <comment id="491697" author="david.storch" created="Fri, 31 Jan 2014 19:47:16 +0000"  >&lt;p&gt;In 2.5.5, an $exists predicate will never use an index. If you have an index over field &apos;x&apos; and only a small percentage of documents in your collection actually have field &apos;x&apos;, then {x: {$exists: true}} will nevertheless be answered with a collection scan. This possibly will change for 2.6.0, but for the meantime users need to restructure their data if they need such $exists queries to be fast. Given that this may change, I&apos;m not sure whether or not we should go about documenting it just yet, but it is still an important point.&lt;/p&gt;

&lt;p&gt;See related ticket &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-12262&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;https://jira.mongodb.org/browse/SERVER-12262&lt;/a&gt;.&lt;/p&gt;</comment>
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