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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <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-83367] [CQF] Include source of cardinality estimates in logical properties</title>
                <link>https://jira.mongodb.org/browse/SERVER-83367</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When we estimate individual predicates, we put the results in a logical property:&lt;/p&gt;
&lt;p/&gt;
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&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;        &quot;|   |   Logical:\n&quot;&lt;/span&gt;&lt;/pre&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;        &quot;|   |       cardinalityEstimate: \n&quot;&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;        &quot;|   |           ce: 189.571\n&quot;&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;        &quot;|   |               refProjection: root, path: &apos;PathGet [a] PathIdentity []&apos;, ce: 330\n&quot;&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
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&lt;p/&gt;
&lt;p&gt;&lt;a href=&quot;https://github.com/10gen/mongo/blob/7ab5c60c1c99ac7ecfbf9e79d5de08dd29fcb37a/src/mongo/db/query/optimizer/physical_rewriter_optimizer_test.cpp#L3299-L3301&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/10gen/mongo/blob/7ab5c60c1c99ac7ecfbf9e79d5de08dd29fcb37a/src/mongo/db/query/optimizer/physical_rewriter_optimizer_test.cpp#L3299-L3301&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Let&apos;s also include a string describing which CE method was used.&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;Change the deriveCE() method to return pair&amp;lt;CEType, std::string&amp;gt;.&lt;/li&gt;
	&lt;li&gt;Each CE implementation should return a short string like &quot;heuristic&quot; or &quot;sampling&quot;.&lt;/li&gt;
	&lt;li&gt;When one CE implementation delegates to another (like when sampling falls back to heuristic) we should report the ultimate source of the CEType (heuristic) and not the wrapper.&lt;/li&gt;
	&lt;li&gt;Update the PartialSchemaKeyCE structure (in CardinalityEstimate) to hold the string for each estimate.&lt;/li&gt;
	&lt;li&gt;Update explain.&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="2502465">SERVER-83367</key>
            <summary>[CQF] Include source of cardinality estimates in logical properties</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="13201">Fixed</resolution>
                                        <assignee username="daniel.segel@mongodb.com">Daniel Segel</assignee>
                                    <reporter username="david.percy@mongodb.com">David Percy</reporter>
                        <labels>
                    </labels>
                <created>Thu, 16 Nov 2023 20:32:33 +0000</created>
                <updated>Mon, 4 Dec 2023 19:11:41 +0000</updated>
                            <resolved>Mon, 4 Dec 2023 19:11:41 +0000</resolved>
                                                    <fixVersion>7.3.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="5919378" author="xgen-internal-githook" created="Fri, 1 Dec 2023 20:37:38 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Daniel Segel&apos;, &apos;email&apos;: &apos;daniel.segel@mongodb.com&apos;, &apos;username&apos;: &apos;dhsegel&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-83367&quot; title=&quot;[CQF] Include source of cardinality estimates in logical properties&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-83367&quot;&gt;&lt;del&gt;SERVER-83367&lt;/del&gt;&lt;/a&gt; Create and use CERecord in Logical Properties&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/19bf481eed2377426769cc25fa447134f82e46e3&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/19bf481eed2377426769cc25fa447134f82e46e3&lt;/a&gt;&lt;/p&gt;</comment>
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