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    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-80494] [CQF] Adjust CE in cost model to account for RemoveOrphansRequirement</title>
                <link>https://jira.mongodb.org/browse/SERVER-80494</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When we are optimizing a group with RemoveOrphansRequirement = false, the logical CE which doesn&apos;t include orphans differs from the &quot;physical CE&quot; because at execution time, the plan fragment will encounter orphaned documents. To account for this discrepancy, this ticket will adjust the CE of such a group by a small &quot;fudge factor&quot; to account for these extra documents.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2429002">SERVER-80494</key>
            <summary>[CQF] Adjust CE in cost model to account for RemoveOrphansRequirement</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</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="ben.shteinfeld@mongodb.com">Ben Shteinfeld</assignee>
                                    <reporter username="ben.shteinfeld@mongodb.com">Ben Shteinfeld</reporter>
                        <labels>
                    </labels>
                <created>Tue, 29 Aug 2023 14:33:26 +0000</created>
                <updated>Sun, 29 Oct 2023 21:16:58 +0000</updated>
                            <resolved>Tue, 29 Aug 2023 20:47:48 +0000</resolved>
                                                    <fixVersion>7.2.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="5667108" author="xgen-internal-githook" created="Tue, 29 Aug 2023 20:46:46 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Ben Shteinfeld&apos;, &apos;email&apos;: &apos;ben.shteinfeld@mongodb.com&apos;, &apos;username&apos;: &apos;bshteinfeld&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-80494&quot; title=&quot;[CQF] Adjust CE in cost model to account for RemoveOrphansRequirement&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-80494&quot;&gt;&lt;del&gt;SERVER-80494&lt;/del&gt;&lt;/a&gt; Adjust CE in cost model based on RemoveOrphansRequirement&lt;/p&gt;

&lt;p&gt;Logical CE does not contain orphans but subtrees of a plan which haven&apos;t&lt;br/&gt;
filtered orphans will encounter them during execution. To account for&lt;br/&gt;
this discrepancy, this patch adds a small &quot;fudge factor&quot; to the CE which&lt;br/&gt;
the costing module uses to determine the cost of a plan fragment.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/99c0b1b3806f45f081b438731074feed15d15a80&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/99c0b1b3806f45f081b438731074feed15d15a80&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="2407158">SERVER-79608</issuekey>
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