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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-58957] $match stage with $expr does not always need to make a &apos;MatchExpression&apos;</title>
                <link>https://jira.mongodb.org/browse/SERVER-58957</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;If a $match (with $expr) stage isn&apos;t a source stage after the rewrite, we could avoid building a &apos;MatchExpression&apos; for the query inside the $match and directly evaluate the aggregate expression inside DocumentSourceMatch stage itself. The main advantage of doing this is that we avoid unnecessary transformation of Document &lt;a href=&quot;https://github.com/mongodb/mongo/blob/c036bbad40012454725f24414e4cf4e8ab5ba9ac/src/mongo/db/pipeline/document_source_match.cpp#L94-L96&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;-&amp;gt;&lt;/a&gt; BSONObj &lt;a href=&quot;https://github.com/10gen/mongo/blob/c036bbad40012454725f24414e4cf4e8ab5ba9ac/src/mongo/db/matcher/expression_expr.cpp#L71&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;-&amp;gt;&lt;/a&gt; Document, that happens in DocumentSourceMatch stage for each document. &lt;/p&gt;</description>
                <environment></environment>
        <key id="1836012">SERVER-58957</key>
            <summary>$match stage with $expr does not always need to make a &apos;MatchExpression&apos;</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="10038" iconUrl="https://jira.mongodb.org/images/icons/subtask.gif" description="">Backlog</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-query-execution">Backlog - Query Execution</assignee>
                                    <reporter username="arun.banala@mongodb.com">Arun Banala</reporter>
                        <labels>
                            <label>neweng</label>
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                <created>Thu, 29 Jul 2021 20:23:34 +0000</created>
                <updated>Tue, 6 Dec 2022 01:04:20 +0000</updated>
                                                                                                <votes>0</votes>
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