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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>[SERVER-58134] Map agg comparison predicates on time-series collections to bucket-level fields</title>
                <link>https://jira.mongodb.org/browse/SERVER-58134</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;As part of the time-series query rewrites, MatchExpression predicates like {&lt;tt&gt;meta.host: {$eq:  &quot;host_0&quot;&lt;/tt&gt;}} are mapped onto bucket-level fields and pushed in front of the _internalUnpackBucket stage so they can potentially utilize an index.&lt;/p&gt;

&lt;p&gt;We should do something similar to aggregation comparison predicates like {&lt;tt&gt;$expr: {$eq: &lt;span class=&quot;error&quot;&gt;&amp;#91;&amp;quot;$meta.host&amp;quot;, &amp;quot;host_0&amp;#93;&lt;/span&gt;&lt;/tt&gt;}} which currently do not participate in this mapping optimization and thus require all the buckets to be unpacked.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1801220">SERVER-58134</key>
            <summary>Map agg comparison predicates on time-series collections to bucket-level fields</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="katherine.wu@mongodb.com">Katherine Wu</assignee>
                                    <reporter username="katherine.wu@mongodb.com">Katherine Wu</reporter>
                        <labels>
                            <label>neweng</label>
                            <label>quick-tech-debt</label>
                    </labels>
                <created>Mon, 28 Jun 2021 20:32:43 +0000</created>
                <updated>Sun, 29 Oct 2023 21:51:32 +0000</updated>
                            <resolved>Thu, 13 Jan 2022 23:11:34 +0000</resolved>
                                                    <fixVersion>5.3.0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="4284573" author="xgen-internal-githook" created="Mon, 10 Jan 2022 23:45:25 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Katherine Wu&apos;, &apos;email&apos;: &apos;katherine.wu@mongodb.com&apos;, &apos;username&apos;: &apos;kaywux&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-58134&quot; title=&quot;Map agg comparison predicates on time-series collections to bucket-level fields&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-58134&quot;&gt;&lt;del&gt;SERVER-58134&lt;/del&gt;&lt;/a&gt; Map agg comparison predicates on time-series colls to bucket-level fields&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/2752424e3ad51243ad8006a64ee32ec2a1223066&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/2752424e3ad51243ad8006a64ee32ec2a1223066&lt;/a&gt;&lt;/p&gt;</comment>
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