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    <language>en-us</language>    <build-info>
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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-7389] Implement heuristic for evaluating most performant operators first inside $and</title>
                <link>https://jira.mongodb.org/browse/SERVER-7389</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The basic idea is that if the doc is &lt;/p&gt;
{ a:0 }
&lt;p&gt; and the query is &lt;/p&gt;
{ a:1, $where:... }
&lt;p&gt; then we should reject on the basis of &apos;a&apos; before evaluating the $where clause (slow).&lt;/p&gt;

&lt;p&gt;In the old Matcher, $and checks:&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;simple operators eg equality, $gt, $in&lt;/li&gt;
	&lt;li&gt;then regular expressions&lt;/li&gt;
	&lt;li&gt;then nested compound expressions (nested $and, $or, etc)&lt;/li&gt;
	&lt;li&gt;then $where&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;We can change the heuristics in the new implementation, but they should stay at least as good as the old ones.&lt;/p&gt;</description>
                <environment></environment>
        <key id="53479">SERVER-7389</key>
            <summary>Implement heuristic for evaluating most performant operators first inside $and</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="10038" iconUrl="https://jira.mongodb.org/images/icons/subtask.gif" description="">Backlog</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-query-execution">Backlog - Query Execution</assignee>
                                    <reporter username="aaron">Aaron Staple</reporter>
                        <labels>
                            <label>query_triage</label>
                    </labels>
                <created>Wed, 17 Oct 2012 19:05:32 +0000</created>
                <updated>Tue, 6 Dec 2022 05:28:25 +0000</updated>
                                                                            <component>Querying</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                        <attachments>
                            <attachment id="33572" name="server7389.js" size="199" author="benety.goh@mongodb.com" created="Thu, 7 Nov 2013 18:30:44 +0000"/>
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