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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-23138] CanonicalQuery::normalizeTree should optimize a $nor with a single child.</title>
                <link>https://jira.mongodb.org/browse/SERVER-23138</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;CanonicalQuery::normalizeTree performs optimizations by looking for logical equivalencies. For example, an AndMatchExpression with one child is equivalent to just that child; nested NotMatchExpressions cancel out. Currently, it does not optimize a NorMatchExpression node with a single child to be a NotMatchExpression with that same child, an optimization that is useful as a result of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-22833&quot; title=&quot;MatchExpression::toBSON does not necessarily produce a valid query object.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-22833&quot;&gt;&lt;del&gt;SERVER-22833&lt;/del&gt;&lt;/a&gt;, which caused NotMatchExpression to serialize to a $nor with one child expression.&lt;/p&gt;</description>
                <environment></environment>
        <key id="272424">SERVER-23138</key>
            <summary>CanonicalQuery::normalizeTree should optimize a $nor with a single child.</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="9">Done</resolution>
                                        <assignee username="david.storch@mongodb.com">David Storch</assignee>
                                    <reporter username="benjamin.murphy">Benjamin Murphy</reporter>
                        <labels>
                            <label>neweng</label>
                    </labels>
                <created>Mon, 14 Mar 2016 22:09:21 +0000</created>
                <updated>Tue, 19 Jul 2016 17:04:24 +0000</updated>
                            <resolved>Wed, 13 Jul 2016 18:48:35 +0000</resolved>
                                                    <fixVersion>3.3.10</fixVersion>
                                    <component>Internal Code</component>
                    <component>Querying</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="1323099" author="xgen-internal-githook" created="Wed, 13 Jul 2016 18:47:32 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;dstorch&apos;, u&apos;name&apos;: u&apos;David Storch&apos;, u&apos;email&apos;: u&apos;david.storch@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23138&quot; title=&quot;CanonicalQuery::normalizeTree should optimize a $nor with a single child.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23138&quot;&gt;&lt;del&gt;SERVER-23138&lt;/del&gt;&lt;/a&gt; make CanonicalQuery normalize $nor with one child to a NOT expression&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/a53d25936a00cce75d7332a4b7e513814773eaf6&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/a53d25936a00cce75d7332a4b7e513814773eaf6&lt;/a&gt;&lt;/p&gt;</comment>
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