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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-70241] [CQF] Implement &quot;auto mode&quot; for cardinality estimation</title>
                <link>https://jira.mongodb.org/browse/SERVER-70241</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This is regarding the flag &quot;kInternalCascadesOptimizerDisableScanDefault&quot;.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;Currently we have 3 options: heuristic, sampling, and histograms. The sampling is currently ignored for small sizes while the histogram is not. The reasoning behind is that it may be too slow given the relative collection size.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;The goal of this ticket is to:&lt;/p&gt;
&lt;ol&gt;
	&lt;li&gt;Add &quot;auto&quot; CE estimator mode which will select the best estimator (contingent on current efforts to implement estimation based on histograms)&lt;/li&gt;
	&lt;li&gt;Allow forcing of estimation strategies (independent on the metadata).&lt;/li&gt;
&lt;/ol&gt;
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        <key id="2152507">SERVER-70241</key>
            <summary>[CQF] Implement &quot;auto mode&quot; for cardinality estimation</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-optimization">Backlog - Query Optimization</assignee>
                                    <reporter username="svilen.mihaylov@mongodb.com">Svilen Mihaylov</reporter>
                        <labels>
                            <label>bonsai-ce</label>
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                <created>Wed, 5 Oct 2022 16:57:52 +0000</created>
                <updated>Wed, 8 Feb 2023 15:47:53 +0000</updated>
                                                                                                <votes>0</votes>
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