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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-63259] Fix inaccurate comment relating to SEARCH_META handling in SBE stage builder</title>
                <link>https://jira.mongodb.org/browse/SERVER-63259</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/882ebf1ad73b1c39af8b0cd82de7c648b8a860d2/src/mongo/db/query/sbe_stage_builder.cpp#L378-L379&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;This comment&lt;/a&gt; implies that the value of the &lt;tt&gt;SEARCH_META&lt;/tt&gt; variable in the SBE &lt;tt&gt;RuntimeEnvironment&lt;/tt&gt; can be set later on. That&apos;s not true. There is no downstream code to set the &lt;tt&gt;SEARCH_META&lt;/tt&gt; value. And if there is a value for &lt;tt&gt;SEARCH_META&lt;/tt&gt; inside &lt;tt&gt;ExpressionContext::variables&lt;/tt&gt;, it will already have been set in the &lt;tt&gt;RuntimeEnvironment&lt;/tt&gt; &lt;a href=&quot;https://github.com/mongodb/mongo/blob/882ebf1ad73b1c39af8b0cd82de7c648b8a860d2/src/mongo/db/query/sbe_stage_builder.cpp#L376&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;After discussing with &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=mihai.andrei&quot; class=&quot;user-hover&quot; rel=&quot;mihai.andrei&quot;&gt;mihai.andrei&lt;/a&gt;, he explained that this code is actually a special case to handle non-$search queries which refer to &lt;tt&gt;SEARCH_META&lt;/tt&gt;. We have an example test in the enterprise modules &lt;a href=&quot;https://github.com/mongodb/mongo/blob/882ebf1ad73b1c39af8b0cd82de7c648b8a860d2/jstests/aggregation/variables/search_meta.js#L22&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;. &lt;tt&gt;SEARCH_META&lt;/tt&gt; is supposed to resolve to &quot;missing&quot; for non-$search queries. We currently deal with this in the SBE stage builder by establishing a missing value in the &lt;tt&gt;RuntimeEnvironment&lt;/tt&gt; and then referring to this runtime environment slot later in the SBE plan. We should update the comment to correctly explain why this code exists.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1976809">SERVER-63259</key>
            <summary>Fix inaccurate comment relating to SEARCH_META handling in SBE stage builder</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="mihai.andrei@mongodb.com">Mihai Andrei</assignee>
                                    <reporter username="david.storch@mongodb.com">David Storch</reporter>
                        <labels>
                            <label>neweng</label>
                    </labels>
                <created>Thu, 3 Feb 2022 17:10:10 +0000</created>
                <updated>Sun, 29 Oct 2023 21:43:09 +0000</updated>
                            <resolved>Mon, 28 Feb 2022 16:11:00 +0000</resolved>
                                                    <fixVersion>6.0.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="4380617" author="xgen-internal-githook" created="Mon, 28 Feb 2022 16:02:07 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Mihai Andrei&apos;, &apos;email&apos;: &apos;mihai.andrei@10gen.com&apos;, &apos;username&apos;: &apos;mtandrei&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-63259&quot; title=&quot;Fix inaccurate comment relating to SEARCH_META handling in SBE stage builder&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-63259&quot;&gt;&lt;del&gt;SERVER-63259&lt;/del&gt;&lt;/a&gt; Generate &apos;Nothing&apos; value for SEARCH_META in SBE stage builder&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/599f2e494d98dcf7cf0b619abdd3c8d582e43880&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/599f2e494d98dcf7cf0b619abdd3c8d582e43880&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4377886" author="xgen-internal-githook" created="Fri, 25 Feb 2022 19:26:10 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Mihai Andrei&apos;, &apos;email&apos;: &apos;mihai.andrei@10gen.com&apos;, &apos;username&apos;: &apos;mtandrei&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-63259&quot; title=&quot;Fix inaccurate comment relating to SEARCH_META handling in SBE stage builder&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-63259&quot;&gt;&lt;del&gt;SERVER-63259&lt;/del&gt;&lt;/a&gt; Update SEARCH_META comment in SBE stage builder&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/6d26e96928ddc1e58f875b223612458c2466ca02&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/6d26e96928ddc1e58f875b223612458c2466ca02&lt;/a&gt;&lt;/p&gt;</comment>
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