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    <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-78047] Push $limit stage into $sort pushdown for time-series collection</title>
                <link>https://jira.mongodb.org/browse/SERVER-78047</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Add time-series query rewrite to push $limit into $sort (for sort on the metadata field) so that we don&apos;t sort buckets that are not necessary&lt;/p&gt;

&lt;p&gt;It is safe to assume that every bucket has at least one measurement. We should rewrite &lt;span class=&quot;error&quot;&gt;&amp;#91;\{$_unpack}, \{$sort}, \{$limit: x}&amp;#93;&lt;/span&gt;&#160;pipeline as&#160;&lt;span class=&quot;error&quot;&gt;&amp;#91;\{$sort(with limit)}, \{$_unpack}, \{$limit: x}&amp;#93;&lt;/span&gt;&lt;/p&gt;</description>
                <environment></environment>
        <key id="2367075">SERVER-78047</key>
            <summary>Push $limit stage into $sort pushdown for time-series collection</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="13201">Fixed</resolution>
                                        <assignee username="alice.li@mongodb.com">Alice Li</assignee>
                                    <reporter username="alice.li@mongodb.com">Alice Li</reporter>
                        <labels>
                    </labels>
                <created>Tue, 13 Jun 2023 17:55:46 +0000</created>
                <updated>Sun, 29 Oct 2023 21:20:06 +0000</updated>
                            <resolved>Tue, 11 Jul 2023 18:28:18 +0000</resolved>
                                                    <fixVersion>7.1.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="5544776" author="xgen-internal-githook" created="Wed, 5 Jul 2023 15:40:44 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Alice Li&apos;, &apos;email&apos;: &apos;alice.li@mongodb.com&apos;, &apos;username&apos;: &apos;&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-78047&quot; title=&quot;Push $limit stage into $sort pushdown for time-series collection&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-78047&quot;&gt;&lt;del&gt;SERVER-78047&lt;/del&gt;&lt;/a&gt; Push $limit up into $sort for time-series collection&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/3b29c47e90d2c0f3546ac391b5c05b6244f5549a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/3b29c47e90d2c0f3546ac391b5c05b6244f5549a&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="2344636">SERVER-77276</issuekey>
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