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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-50766] [SBE] Identify cases where it&apos;s safe to use LeafArrayTraversalMode::kArrayElementsOnly</title>
                <link>https://jira.mongodb.org/browse/SERVER-50766</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The diff for&#160;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-49819&quot; title=&quot;[SBE] find() should apply most operators to both array field&amp;#39;s elements and array itself&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-49819&quot;&gt;&lt;del&gt;SERVER-49819&lt;/del&gt;&lt;/a&gt; changed &quot;sbe_stage_builder_filter.cpp&quot; so that most operators call generateTraverse() with the mode = LeafArrayTraversalMode::kArrayAndItsElements, which generates a slightly more complex SBE plan tree that will apply the specified predicate to both an array&apos;s elements and the array itself.&lt;/p&gt;

&lt;p&gt;The goal of this task is to see if there are cases where we can safely call generateTraverse() with mode =&#160;LeafArrayTraversalMode::kArrayElementsOnly instead (which would generate a slightly simpler SBE plan tree).&lt;/p&gt;</description>
                <environment></environment>
        <key id="1462537">SERVER-50766</key>
            <summary>[SBE] Identify cases where it&apos;s safe to use LeafArrayTraversalMode::kArrayElementsOnly</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="nikita.lapkov@mongodb.com">Nikita Lapkov</assignee>
                                    <reporter username="andrew.paroski@mongodb.com">Drew Paroski</reporter>
                        <labels>
                            <label>qexec-team</label>
                    </labels>
                <created>Thu, 3 Sep 2020 23:10:58 +0000</created>
                <updated>Sun, 29 Oct 2023 22:03:33 +0000</updated>
                            <resolved>Fri, 19 Mar 2021 10:01:41 +0000</resolved>
                                                    <fixVersion>4.9.0</fixVersion>
                                    <component>Querying</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="3672898" author="xgen-internal-githook" created="Fri, 19 Mar 2021 09:57:17 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Nikita Lapkov&apos;, &apos;email&apos;: &apos;nikita.lapkov@mongodb.com&apos;, &apos;username&apos;: &apos;laplab&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-50766&quot; title=&quot;[SBE] Identify cases where it&amp;#39;s safe to use LeafArrayTraversalMode::kArrayElementsOnly&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-50766&quot;&gt;&lt;del&gt;SERVER-50766&lt;/del&gt;&lt;/a&gt; Use kArrayElementsOnly path traversal mode where possible&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/76d86a901685b7de79cb28df7c52ba91b43d5b75&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/76d86a901685b7de79cb28df7c52ba91b43d5b75&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3657349" author="JIRAUSER1255444" created="Wed, 10 Mar 2021 17:45:18 +0000"  >&lt;p&gt;During the work on &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-51470&quot; title=&quot;[SBE] Decide if we should rewrite generatePathTraversal() to only call &#8220;makePredicate&#8221; callback once&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-51470&quot;&gt;&lt;del&gt;SERVER-51470&lt;/del&gt;&lt;/a&gt;, we have decided that it would be better to conduct this investigation now.&lt;/p&gt;</comment>
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