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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <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-30399] Add caching for $lookup non-correlated sub-pipeline prefix</title>
                <link>https://jira.mongodb.org/browse/SERVER-30399</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description></description>
                <environment></environment>
        <key id="409600">SERVER-30399</key>
            <summary>Add caching for $lookup non-correlated sub-pipeline prefix</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="bernard.gorman@mongodb.com">Bernard Gorman</assignee>
                                    <reporter username="james.wahlin@mongodb.com">James Wahlin</reporter>
                        <labels>
                    </labels>
                <created>Fri, 28 Jul 2017 14:15:36 +0000</created>
                <updated>Mon, 30 Oct 2023 23:14:48 +0000</updated>
                            <resolved>Sun, 24 Sep 2017 20:05:18 +0000</resolved>
                                                    <fixVersion>3.6.0-rc0</fixVersion>
                                    <component>Aggregation Framework</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="1680410" author="bernard.gorman" created="Sun, 24 Sep 2017 20:11:53 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=justin.seyster&quot; class=&quot;user-hover&quot; rel=&quot;justin.seyster&quot;&gt;justin.seyster&lt;/a&gt;: this patch contains a couple of minor TODO items which the &lt;tt&gt;MatchExpression::optimize()&lt;/tt&gt; patch in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-30991&quot; title=&quot;Introduce MatchExpression::optimize()&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-30991&quot;&gt;&lt;del&gt;SERVER-30991&lt;/del&gt;&lt;/a&gt; will need to include:&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/21f5028d4404ea9584d53bdb81dd63ca8a505d6f/src/mongo/db/pipeline/document_source_match.cpp#L72&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;This line&lt;/a&gt; will need to be uncommented.&lt;/li&gt;
	&lt;li&gt;The &lt;tt&gt;$expr&lt;/tt&gt; in &lt;a href=&quot;https://github.com/mongodb/mongo/blob/21f5028d4404ea9584d53bdb81dd63ca8a505d6f/src/mongo/db/pipeline/document_source_lookup_test.cpp#L681&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;this test&lt;/a&gt; will resolve to a &lt;tt&gt;$const&lt;/tt&gt; rather than a &lt;tt&gt;$$var&lt;/tt&gt; once &lt;tt&gt;optimize()&lt;/tt&gt; is available.&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;I believe those are the only changes that should be needed - let&apos;s sync up in person tomorrow.&lt;/p&gt;</comment>
                            <comment id="1680409" author="xgen-internal-githook" created="Sun, 24 Sep 2017 20:02:16 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;bernard.gorman@gmail.com&apos;, &apos;name&apos;: &apos;Bernard Gorman&apos;, &apos;username&apos;: &apos;gormanb&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-30399&quot; title=&quot;Add caching for $lookup non-correlated sub-pipeline prefix&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-30399&quot;&gt;&lt;del&gt;SERVER-30399&lt;/del&gt;&lt;/a&gt; Add caching for $lookup non-correlated sub-pipeline prefix&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/21f5028d4404ea9584d53bdb81dd63ca8a505d6f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/21f5028d4404ea9584d53bdb81dd63ca8a505d6f&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="1770121">SERVER-57483</issuekey>
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            <issuelink>
            <issuekey id="1774361">SERVER-57579</issuekey>
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