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    <title>MongoDB Jira</title>
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    <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-69895] [CQF] Support reverse collscan: hint: {$natural: -1}</title>
                <link>https://jira.mongodb.org/browse/SERVER-69895</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;We currently permit {$natural: 1} hints, but &lt;a href=&quot;https://github.com/10gen/mongo/blob/master/src/mongo/db/query/cqf_get_executor.cpp#L80-L83&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;uassert&lt;/a&gt; on {$natural: -1} hints. Instead of uasserting, we should support both hints.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2143156">SERVER-69895</key>
            <summary>[CQF] Support reverse collscan: hint: {$natural: -1}</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="hana.pearlman@mongodb.com">Hana Pearlman</assignee>
                                    <reporter username="hana.pearlman@mongodb.com">Hana Pearlman</reporter>
                        <labels>
                            <label>cascades-starter</label>
                            <label>hint</label>
                    </labels>
                <created>Thu, 22 Sep 2022 13:39:23 +0000</created>
                <updated>Sun, 29 Oct 2023 21:32:57 +0000</updated>
                            <resolved>Mon, 23 Jan 2023 16:40:27 +0000</resolved>
                                                    <fixVersion>6.3.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="5133523" author="xgen-internal-githook" created="Mon, 23 Jan 2023 16:34:29 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Hana Pearlman&apos;, &apos;email&apos;: &apos;hana.pearlman@mongodb.com&apos;, &apos;username&apos;: &apos;HanaPearlman&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-69895&quot; title=&quot;[CQF] Support reverse collscan: hint: {$natural: -1}&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-69895&quot;&gt;&lt;del&gt;SERVER-69895&lt;/del&gt;&lt;/a&gt;: Support hinting reverse collection scans&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/e7643a84006dddaf997e1a50914afaf54f32abfd&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/e7643a84006dddaf997e1a50914afaf54f32abfd&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5067929" author="david.percy" created="Tue, 20 Dec 2022 17:13:16 +0000"  >&lt;p&gt;It looks like currently Bonsai interprets {$natural: 1} to mean &quot;don&apos;t use indexes&quot;.  To support {$natural: -1} we need to add something like &quot;sort by record ID descending&quot;.  I wonder if we should also be more explicit that {$natural: 1} means &quot;sort by record ID ascending&quot;.&lt;/p&gt;</comment>
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            <issuekey id="1961556">SERVER-62504</issuekey>
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