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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-80563] Push $unwind aggregation stage down to SBE</title>
                <link>https://jira.mongodb.org/browse/SERVER-80563</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;b&gt;Planner Updates&lt;/b&gt;&lt;/p&gt;

&lt;p&gt;Update planner to push down $unwinds in eligible prefixes.&lt;br/&gt;
&#160;&lt;/p&gt;

&lt;p&gt;&lt;b&gt;Stage Builder Updates&lt;/b&gt;&lt;/p&gt;

&lt;p&gt;Update stage builder to build pushed-down $unwind stages.&lt;/p&gt;

&lt;p&gt;&#160;&lt;br/&gt;
&lt;b&gt;SBE Plan Cache&lt;/b&gt;&lt;/p&gt;

&lt;p&gt;Encode pushed down $unwind stages in the plan cache key (canonical_query_encoder.cpp encodePipeline()).&apos;&lt;/p&gt;

&lt;p&gt;&#160;&lt;br/&gt;
&lt;b&gt;Update Existing Jstests&lt;/b&gt;&lt;/p&gt;

&lt;p&gt;Many tests examine explain output, some instances of which will change when $unwind is pushed down so will need alternate expected results based on featureFlagSbeFull during development. The old expected results will be removed along with featureFlagSbeFull when the feature is complete.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2430699">SERVER-80563</key>
            <summary>Push $unwind aggregation stage down to SBE</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="kevin.cherkauer@mongodb.com">Kevin Cherkauer</assignee>
                                    <reporter username="kevin.cherkauer@mongodb.com">Kevin Cherkauer</reporter>
                        <labels>
                    </labels>
                <created>Wed, 30 Aug 2023 20:32:08 +0000</created>
                <updated>Mon, 6 Nov 2023 12:56:13 +0000</updated>
                            <resolved>Thu, 2 Nov 2023 15:55:25 +0000</resolved>
                                                    <fixVersion>7.2.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="5848329" author="xgen-internal-githook" created="Thu, 2 Nov 2023 03:43:26 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Kevin Cherkauer&apos;, &apos;email&apos;: &apos;kevin.cherkauer@mongodb.com&apos;, &apos;username&apos;: &apos;kevin-cherkauer&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-80563&quot; title=&quot;Push $unwind aggregation stage down to SBE&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-80563&quot;&gt;&lt;del&gt;SERVER-80563&lt;/del&gt;&lt;/a&gt; Push $unwind aggregation stage down to SBE&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/b31df3d20a1323f48fb03e228cb5b193c77194ea&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/b31df3d20a1323f48fb03e228cb5b193c77194ea&lt;/a&gt;&lt;/p&gt;</comment>
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