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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-55295] Short circuit $ifNull expression if the condition always evaluates to a constant or null</title>
                <link>https://jira.mongodb.org/browse/SERVER-55295</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The evaluate() method of ExpressionIfNull short circuits when it finds the first non-nullish value.  So an expression like {$ifNull: &lt;span class=&quot;error&quot;&gt;&amp;#91;null, &amp;quot;$a&amp;quot;&amp;#93;&lt;/span&gt;} could be optimized to &quot;$a&quot;.&lt;/p&gt;

&lt;p&gt;Currently it doesn&apos;t override optimize().  It inherits some optimizations from ExpressionNary, but short circuiting is not one of them.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1652568">SERVER-55295</key>
            <summary>Short circuit $ifNull expression if the condition always evaluates to a constant or null</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="alice.doherty@mongodb.com">Alice Doherty</assignee>
                                    <reporter username="nicholas.zolnierz@mongodb.com">Nicholas Zolnierz</reporter>
                        <labels>
                            <label>neweng</label>
                    </labels>
                <created>Thu, 18 Mar 2021 13:54:37 +0000</created>
                <updated>Sun, 29 Oct 2023 21:56:09 +0000</updated>
                            <resolved>Mon, 5 Jul 2021 09:29:36 +0000</resolved>
                                                    <fixVersion>5.1.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="4107922" author="JIRAUSER1259052" created="Wed, 6 Oct 2021 18:51:37 +0000"  >&lt;p&gt;Updating the fixversion since branching activities occurred yesterday. This ticket will be in rc0 when it&#8217;s been triggered. For more active release information, please keep an eye on #server-release. Thank you!&lt;/p&gt;</comment>
                            <comment id="3910530" author="xgen-internal-githook" created="Wed, 30 Jun 2021 17:33:05 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Alice Doherty&apos;, &apos;email&apos;: &apos;alice.doherty@mongodb.com&apos;, &apos;username&apos;: &apos;alicedoherty&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-55295&quot; title=&quot;Short circuit $ifNull expression if the condition always evaluates to a constant or null&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-55295&quot;&gt;&lt;del&gt;SERVER-55295&lt;/del&gt;&lt;/a&gt; Short circuit $ifNull expression if the condition always evaluates to a constant or null&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/3eb04f477ea08e9cd346a34a5d131db0d05289fb&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/3eb04f477ea08e9cd346a34a5d131db0d05289fb&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3684570" author="david.percy" created="Thu, 25 Mar 2021 18:59:56 +0000"  >&lt;p&gt;This is similar to $cond: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-55297&quot; title=&quot;Short circuit $cond if condition is a constant&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-55297&quot;&gt;&lt;del&gt;SERVER-55297&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="1824421">SERVER-58680</issuekey>
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            <issuekey id="1652594">SERVER-55297</issuekey>
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