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    <title>MongoDB Jira</title>
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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-22402] Add dependency tracking to the $match stage</title>
                <link>https://jira.mongodb.org/browse/SERVER-22402</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently &lt;tt&gt;DocumentSourceMatch&lt;/tt&gt; does not implement &lt;tt&gt;getDependencies&lt;/tt&gt;, which means that we cannot tell which fields will be needed by the match stage, and hence must ask for all fields. This can limit our ability to project out unneeded fields.&lt;/p&gt;

&lt;p&gt;We should add an implementation of &lt;tt&gt;getDependencies&lt;/tt&gt; that will look at it&apos;s &lt;tt&gt;MatchExpression&lt;/tt&gt; to determine which fields are needed.&lt;/p&gt;</description>
                <environment></environment>
        <key id="262206">SERVER-22402</key>
            <summary>Add dependency tracking to the $match stage</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="9">Done</resolution>
                                        <assignee username="benjamin.murphy">Benjamin Murphy</assignee>
                                    <reporter username="charlie.swanson@mongodb.com">Charlie Swanson</reporter>
                        <labels>
                            <label>optimization</label>
                    </labels>
                <created>Mon, 1 Feb 2016 16:48:24 +0000</created>
                <updated>Tue, 1 Aug 2017 16:32:58 +0000</updated>
                            <resolved>Fri, 26 Feb 2016 15:56:47 +0000</resolved>
                                                    <fixVersion>3.3.3</fixVersion>
                                    <component>Aggregation Framework</component>
                    <component>Internal Code</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="1185926" author="xgen-internal-githook" created="Fri, 26 Feb 2016 15:55:43 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;benjaminmurphy&apos;, u&apos;name&apos;: u&apos;Benjamin Murphy&apos;, u&apos;email&apos;: u&apos;benjamin_murphy@me.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-22402&quot; title=&quot;Add dependency tracking to the $match stage&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-22402&quot;&gt;&lt;del&gt;SERVER-22402&lt;/del&gt;&lt;/a&gt; DocumentSourceMatch now includes dependency tracking.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/dd1fb77f48537e2b02511ef9a0c5ccdea9530a8b&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/dd1fb77f48537e2b02511ef9a0c5ccdea9530a8b&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="408694">SERVER-30342</issuekey>
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            <issuekey id="265731">SERVER-22631</issuekey>
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