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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-65080] Support the SBE pushdown of $lookup when _internalCollation is present.</title>
                <link>https://jira.mongodb.org/browse/SERVER-65080</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;In &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-64482&quot; title=&quot;Make SBE $lookup aware of collation&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-64482&quot;&gt;&lt;del&gt;SERVER-64482&lt;/del&gt;&lt;/a&gt; Make SBE $lookup aware of collation, we found $lookup has an internal parameter _internalCollation and we decided to not push down $lookup to SBE when this parameter is present in PM-2449.&lt;/p&gt;

&lt;p&gt;This ticket is a placeholder/reminder for us to see how do we handle this in SBE when we make more progress deprecating the classic engine.&lt;/p&gt;

&lt;p&gt;This _internalCollation parameter was introduced in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-53637&quot; title=&quot;Allow collation to be specified for a $lookup sub-pipeline&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-53637&quot;&gt;&lt;del&gt;SERVER-53637&lt;/del&gt;&lt;/a&gt; for resharding. As part of the resharding effort we need to run a pipeline with the collection&#8217;s default collation, but then use the simple collation for a specific comparison concerning the chunk boundaries.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2012446">SERVER-65080</key>
            <summary>Support the SBE pushdown of $lookup when _internalCollation is present.</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</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="ethan.zhang@mongodb.com">Ethan Zhang</reporter>
                        <labels>
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                <created>Wed, 30 Mar 2022 18:08:11 +0000</created>
                <updated>Tue, 6 Dec 2022 00:18:51 +0000</updated>
                                                                                                <votes>0</votes>
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