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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-79451] [CQF] Investigate support for special indexes under $natural hint</title>
                <link>https://jira.mongodb.org/browse/SERVER-79451</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-78994&quot; title=&quot;[CQF] Change fallback to allow eligible queries through CQF when there is a $natural hint&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-78994&quot;&gt;&lt;del&gt;SERVER-78994&lt;/del&gt;&lt;/a&gt; changed the fallback such that we run queries against collections with non-special indexes through CQF if the query has a $natural hint. This ticket tracks the investigation of whether we want to extend this to special indexes. The work would likely include building metadata (IndexDefinition, MultikeynessTrie) for special indexes.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2403782">SERVER-79451</key>
            <summary>[CQF] Investigate support for special indexes under $natural hint</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="13201">Fixed</resolution>
                                        <assignee username="militsa.sotirova@mongodb.com">Militsa Sotirova</assignee>
                                    <reporter username="militsa.sotirova@mongodb.com">Militsa Sotirova</reporter>
                        <labels>
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                <created>Fri, 28 Jul 2023 13:23:59 +0000</created>
                <updated>Sun, 29 Oct 2023 21:18:18 +0000</updated>
                            <resolved>Mon, 14 Aug 2023 14:21:49 +0000</resolved>
                                                    <fixVersion>7.1.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="5632205" author="xgen-internal-githook" created="Mon, 14 Aug 2023 14:15:30 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Militsa Sotirova&apos;, &apos;email&apos;: &apos;militsa.sotirova@mongodb.com&apos;, &apos;username&apos;: &apos;militsasotirova&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-79451&quot; title=&quot;[CQF] Investigate support for special indexes under $natural hint&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-79451&quot;&gt;&lt;del&gt;SERVER-79451&lt;/del&gt;&lt;/a&gt; Support queries against collections with special indexes, except hashed, to go through CQF under natural hint&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/f0d9da7c9a3e112a1dff43d20f2ab046cbc2bfa4&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/f0d9da7c9a3e112a1dff43d20f2ab046cbc2bfa4&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5603103" author="JIRAUSER1260464" created="Mon, 31 Jul 2023 19:34:07 +0000"  >&lt;p&gt;As discussed during standup, changing the metadata structures to support special indexes would require much more design than is in scope for this ticket, so this ticket will capture the work to just allow these special indexes through CQF, but not use their metadata.&lt;/p&gt;</comment>
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