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        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[DOCS-5440] Call out compound key case in sparse unique indexes</title>
                <link>https://jira.mongodb.org/browse/DOCS-5440</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;p&gt;&lt;a href=&quot;http://docs.mongodb.org/v2.6/core/index-sparse/#sparse-and-unique-properties&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;The docs&lt;/a&gt; state:&lt;/p&gt;
&lt;blockquote&gt;
&lt;p&gt;sparse and unique Properties&lt;/p&gt;

&lt;p&gt;An index that is both sparse and unique prevents collection from having documents with duplicate values for a field but allows multiple documents that omit the key.&lt;/p&gt;&lt;/blockquote&gt;

&lt;p&gt;The idea of the [entire] key being absent has some nuance that is not immediately apparent; in the case of a &lt;b&gt;compound&lt;/b&gt; key, all elements of the key must be absent in order for this to apply.&lt;/p&gt;

&lt;p&gt;A suggested alternative would be:&lt;/p&gt;

&lt;blockquote&gt;&lt;p&gt;allows multiple documents that omit &lt;b&gt;all fields&lt;/b&gt; in the key&lt;/p&gt;&lt;/blockquote&gt;</description>
                <environment></environment>
        <key id="204387">DOCS-5440</key>
            <summary>Call out compound key case in sparse unique indexes</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="kay.kim@mongodb.com">Kay Kim</assignee>
                                    <reporter username="steffan.mejia@mongodb.com">Steffan Mejia</reporter>
                        <labels>
                            <label>indexes</label>
                            <label>sparse</label>
                            <label>unique</label>
                    </labels>
                <created>Fri, 15 May 2015 03:48:14 +0000</created>
                <updated>Mon, 30 Oct 2023 22:29:08 +0000</updated>
                            <resolved>Tue, 1 Nov 2022 11:02:38 +0000</resolved>
                                    <version>mongodb-2.6</version>
                    <version>mongodb-3.0</version>
                                    <fixVersion>Server_Docs_20231030</fixVersion>
                                    <component>manual</component>
                    <component>Server</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="4943670" author="edu.bot" created="Tue, 1 Nov 2022 11:02:35 +0000"  >&lt;p&gt;Hello! This ticket has been closed due to inactivity. If you believe this ticket is still important, please reopen it and leave a comment to explain why. Thank you!&lt;/p&gt;</comment>
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