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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-78235] pushdown $group ahead of unpack with $count</title>
                <link>https://jira.mongodb.org/browse/SERVER-78235</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This is a follow-up ticket to &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-78234&quot; title=&quot;extend min/max pushdown for $group for fixed bucketing&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-78234&quot;&gt;&lt;del&gt;SERVER-78234&lt;/del&gt;&lt;/a&gt; to extend the optimization that exists for $group with min/max to $group that uses $count. For v2 buckets we can use control.count, and for v1 buckets we need to compute based on the timeField.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2372607">SERVER-78235</key>
            <summary>pushdown $group ahead of unpack with $count</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="gil.alon@mongodb.com">Gil Alon</assignee>
                                    <reporter username="gil.alon@mongodb.com">Gil Alon</reporter>
                        <labels>
                    </labels>
                <created>Tue, 20 Jun 2023 14:51:29 +0000</created>
                <updated>Sun, 29 Oct 2023 21:19:49 +0000</updated>
                            <resolved>Fri, 11 Aug 2023 17:39:14 +0000</resolved>
                                                    <fixVersion>7.1.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="5669548" author="JIRAUSER1260430" created="Wed, 30 Aug 2023 17:17:26 +0000"  >&lt;p&gt;Based on WRITING-14930 we see 139x in performance when the buckets are compact and 71x improvement in tsbs data with this optimization. Since control.count was added in 5.2, we can implement this rewrite in versions 6.0 and 7.0.&lt;/p&gt;</comment>
                            <comment id="5629397" author="xgen-internal-githook" created="Fri, 11 Aug 2023 17:29:33 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Gil Alon&apos;, &apos;email&apos;: &apos;gil.alon@mongodb.com&apos;, &apos;username&apos;: &apos;galon1&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-78235&quot; title=&quot;pushdown $group ahead of unpack with $count&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-78235&quot;&gt;&lt;del&gt;SERVER-78235&lt;/del&gt;&lt;/a&gt; Rewrite $group with $count accumulator for timeseries collections&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/0c366ea804e60559d82d499ee9e8bdf77753639c&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/0c366ea804e60559d82d499ee9e8bdf77753639c&lt;/a&gt;&lt;/p&gt;</comment>
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