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        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-17580] Warn when using only one of $min or $max index bounds</title>
                <link>https://jira.mongodb.org/browse/SERVER-17580</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;In the absence of a fix for &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-15168&quot; title=&quot;Allow intersection of $min/$max bounds with computed query indexBounds&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-15168&quot;&gt;&lt;del&gt;SERVER-15168&lt;/del&gt;&lt;/a&gt; (now tracked as &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-8045&quot; title=&quot;Extend predicate language to support $min/$max use cases&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-8045&quot;&gt;SERVER-8045&lt;/a&gt;), it would be useful to output a warning when a query is issued which uses &lt;tt&gt;$min&lt;/tt&gt; but not &lt;tt&gt;$max&lt;/tt&gt;, or vice-versa.  This is because such usage can often have deleterious performance, and is contrary to the intended usage of &lt;tt&gt;$min&lt;/tt&gt;/&lt;tt&gt;$max&lt;/tt&gt; (see &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-4015&quot; title=&quot;Document performance impacts of $min without $max (and vice-versa)&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-4015&quot;&gt;&lt;del&gt;DOCS-4015&lt;/del&gt;&lt;/a&gt;).&lt;/p&gt;

&lt;p&gt;Since the main in-server usage of &lt;tt&gt;$min&lt;/tt&gt;/&lt;tt&gt;$max&lt;/tt&gt; is for sharding, and always specifies both &lt;tt&gt;$min&lt;/tt&gt; and &lt;tt&gt;$max&lt;/tt&gt;, the warning would only occur with user queries that only specify either &lt;tt&gt;$min&lt;/tt&gt; or &lt;tt&gt;$max&lt;/tt&gt; (but not both).&lt;/p&gt;</description>
                <environment></environment>
        <key id="189336">SERVER-17580</key>
            <summary>Warn when using only one of $min or $max index bounds</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</priority>
                        <status id="1" iconUrl="https://jira.mongodb.org/images/icons/statuses/open.png" description="">Open</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-query-optimization">Backlog - Query Optimization</assignee>
                                    <reporter username="kevin.pulo@mongodb.com">Kevin Pulo</reporter>
                        <labels>
                            <label>diagnostics</label>
                    </labels>
                <created>Fri, 13 Mar 2015 06:32:45 +0000</created>
                <updated>Tue, 6 Dec 2022 04:54:40 +0000</updated>
                                                            <fixVersion>features we&amp;#39;re not sure of</fixVersion>
                                    <component>Querying</component>
                                        <votes>0</votes>
                                    <watches>8</watches>
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            <issuekey id="157305">DOCS-4015</issuekey>
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            <issuekey id="156825">SERVER-15168</issuekey>
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            <issuekey id="746488">SERVER-40873</issuekey>
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