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            <title>[SERVER-62749] Translate $in using EqMember op type</title>
                <link>https://jira.mongodb.org/browse/SERVER-62749</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;During &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-61991&quot; title=&quot;ABT translation for $in match expression&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-61991&quot;&gt;&lt;del&gt;SERVER-61991&lt;/del&gt;&lt;/a&gt;, there was a discussion about how best to handle large &lt;tt&gt;$in&lt;/tt&gt; during ABT translation and optimization. The approach we went with uses a more verbose but generic ABT to represent a &lt;tt&gt;$in&lt;/tt&gt; . Each equality is translated into a &lt;tt&gt;PathCompare&lt;/tt&gt;, which are all composed with nested binary &lt;tt&gt;PathComposeA&lt;/tt&gt; operators under a common sequence of path elements representing the expression path. Through rewrites,  this is condensed into a &lt;tt&gt;SargableNode&lt;/tt&gt; with tight bounds.&lt;/p&gt;

&lt;p&gt;With the introduction of a new op type (EqMember) we can now address some of the concerns with the original approach, namely that the representation involves many extra nodes (compose and compare)&lt;/p&gt;</description>
                <environment></environment>
        <key id="1966710">SERVER-62749</key>
            <summary>Translate $in using EqMember op type</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="emily.wang@mongodb.com">Emily Wang</assignee>
                                    <reporter username="hana.pearlman@mongodb.com">Hana Pearlman</reporter>
                        <labels>
                    </labels>
                <created>Wed, 19 Jan 2022 16:13:16 +0000</created>
                <updated>Sun, 29 Oct 2023 21:43:57 +0000</updated>
                            <resolved>Tue, 2 Aug 2022 14:08:47 +0000</resolved>
                                                    <fixVersion>6.1.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>6</watches>
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