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    <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-63690] Implement path handling of localField when lowering $lookup to SBE</title>
                <link>https://jira.mongodb.org/browse/SERVER-63690</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Both, the localField and foreignField, can be paths and we need to generate correct traversal sub-trees for them.&lt;/p&gt;

&lt;p&gt;Notes: &lt;br/&gt;
1. paths with numbers, such as &quot;a.0.b&quot; aren&apos;t lowered for find queries so we should not lower $lookup stages that use them either&lt;br/&gt;
2. the path traversal logic in the classic engine can be found here: &lt;a href=&quot;https://github.com/10gen/mongo/blob/3a0132fcb97a7559b9bfdb0021b25e30f873acb1/src/mongo/db/pipeline/document_source_lookup.cpp#L832-L837&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/10gen/mongo/blob/3a0132fcb97a7559b9bfdb0021b25e30f873acb1/src/mongo/db/pipeline/document_source_lookup.cpp#L832-L837&lt;/a&gt;. We should strive to replicate it unless we &lt;em&gt;explicitly&lt;/em&gt; decide not to (which should be then documented by separate tickets)&lt;/p&gt;</description>
                <environment></environment>
        <key id="1984142">SERVER-63690</key>
            <summary>Implement path handling of localField when lowering $lookup to SBE</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="irina.yatsenko@mongodb.com">Irina Yatsenko</assignee>
                                    <reporter username="irina.yatsenko@mongodb.com">Irina Yatsenko</reporter>
                        <labels>
                    </labels>
                <created>Tue, 15 Feb 2022 20:09:44 +0000</created>
                <updated>Sun, 29 Oct 2023 21:42:26 +0000</updated>
                            <resolved>Mon, 21 Mar 2022 07:13:38 +0000</resolved>
                                                    <fixVersion>6.0.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="4420215" author="xgen-internal-githook" created="Fri, 18 Mar 2022 08:29:42 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Irina Yatsenko&apos;, &apos;email&apos;: &apos;irina.yatsenko@mongodb.com&apos;, &apos;username&apos;: &apos;IrinaYatsenko&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-63690&quot; title=&quot;Implement path handling of localField when lowering $lookup to SBE&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-63690&quot;&gt;&lt;del&gt;SERVER-63690&lt;/del&gt;&lt;/a&gt; Support field paths in localField of lookup when lowering to SBE&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/ebb1f3900176b9df1f3c20646f349c9785914c43&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/ebb1f3900176b9df1f3c20646f349c9785914c43&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4392956" author="xgen-internal-githook" created="Sat, 5 Mar 2022 00:45:37 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Irina Yatsenko&apos;, &apos;email&apos;: &apos;irina.yatsenko@mongodb.com&apos;, &apos;username&apos;: &apos;IrinaYatsenko&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-63690&quot; title=&quot;Implement path handling of localField when lowering $lookup to SBE&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-63690&quot;&gt;&lt;del&gt;SERVER-63690&lt;/del&gt;&lt;/a&gt; Mark lookup stage as sbe-incompatible if local/foreign fields use paths with numerals&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/10ab59b4f648b88d25fa24eb62df34fc2179dbb9&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/10ab59b4f648b88d25fa24eb62df34fc2179dbb9&lt;/a&gt;&lt;/p&gt;</comment>
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                                        <issuelink>
            <issuekey id="1978557">SERVER-63368</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="1991636">SERVER-64060</issuekey>
        </issuelink>
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            <issuekey id="2000669">SERVER-64483</issuekey>
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