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    <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-68934] Audit treatment of Nothing in lowering code</title>
                <link>https://jira.mongodb.org/browse/SERVER-68934</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This ticket is to audit treatment of Nothing in the lowering code to understand where &amp;amp; why we need fillEmpty and to see if handling of Nothing is missing anywhere.&lt;/p&gt;

&lt;p&gt;For example, when &lt;a href=&quot;https://github.com/10gen/mongo/blob/6c381c901f1546d4514d81e17318b12dcb0a264e/src/mongo/db/query/optimizer/rewrites/path_lower.cpp#L361-L375&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;lowering&lt;/a&gt; PathComposeA/M in the Filter context, we use fillEmpty on the first child path, which is the input to an If expression. Is this necessary? Should we have a fillEmpty on the second path as well?&lt;/p&gt;</description>
                <environment></environment>
        <key id="2116853">SERVER-68934</key>
            <summary>Audit treatment of Nothing in lowering code</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="davis.haupt@mongodb.com">Davis Haupt</assignee>
                                    <reporter username="hana.pearlman@mongodb.com">Hana Pearlman</reporter>
                        <labels>
                    </labels>
                <created>Thu, 18 Aug 2022 13:46:42 +0000</created>
                <updated>Sun, 29 Oct 2023 21:34:19 +0000</updated>
                            <resolved>Fri, 20 Jan 2023 18:26:54 +0000</resolved>
                                                    <fixVersion>6.3.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="5127727" author="xgen-internal-githook" created="Fri, 20 Jan 2023 18:25:44 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Davis Haupt&apos;, &apos;email&apos;: &apos;davis.haupt@mongodb.com&apos;, &apos;username&apos;: &apos;davish&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-68934&quot; title=&quot;Audit treatment of Nothing in lowering code&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-68934&quot;&gt;&lt;del&gt;SERVER-68934&lt;/del&gt;&lt;/a&gt; remove fillEmpty from PathComposeM lowering under EvalFilter&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/27e10aee0999b20fd460d2bed4b86c255949f394&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/27e10aee0999b20fd460d2bed4b86c255949f394&lt;/a&gt;&lt;/p&gt;</comment>
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