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            <title>[SERVER-68092] [CQF] Allow estimates for individual multikey entries in PartialSchemaRequirements map</title>
                <link>https://jira.mongodb.org/browse/SERVER-68092</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently the estimates are held in PartialSchemaKeyCE which is a regular map.&lt;/p&gt;

&lt;p&gt;For examples if we have 3 entries with the following paths: Get &quot;a&quot; Traverse Id, Get &quot;a&quot; Traverse Id, Get &quot;b&quot; Traverse Id, we will create only two entries in the PartialSchemaKeyCE structure: Get &quot;a&quot; Traverse Id and Get &quot;b&quot; Traverse Id.&lt;/p&gt;

&lt;p&gt;As such during estimation we average the individual estimates on the same path and encode them as a single entry. While in practice there is currently no reason to expect a significant plan difference as a result, in principle we would like to encode, the separate estimates (in the example for Get &quot;a&quot; Traverse Id). To achieve this we would need to change the representation of the interval structures.&lt;/p&gt;

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

&lt;p&gt;One possible way is to transition PartialSchemaKeyCE to map&amp;lt;size_t, CEType&amp;gt; the key being the &quot;index&quot; of the key in the multimap.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2091435">SERVER-68092</key>
            <summary>[CQF] Allow estimates for individual multikey entries in PartialSchemaRequirements map</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="3">Duplicate</resolution>
                                        <assignee username="backlog-query-optimization">Backlog - Query Optimization</assignee>
                                    <reporter username="svilen.mihaylov@mongodb.com">Svilen Mihaylov</reporter>
                        <labels>
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                <created>Fri, 15 Jul 2022 15:47:54 +0000</created>
                <updated>Mon, 5 Dec 2022 23:56:08 +0000</updated>
                            <resolved>Sun, 4 Sep 2022 19:15:56 +0000</resolved>
                                                                                        <votes>0</votes>
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