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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-77188] [CQF] Test that Bonsai uses the multikeyness info of all indexes when a persistent hint or index filter is present</title>
                <link>https://jira.mongodb.org/browse/SERVER-77188</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;After &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-73619&quot; title=&quot;[CQF] Keep multikeyness info for disabled indexes&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-73619&quot;&gt;&lt;del&gt;SERVER-73619&lt;/del&gt;&lt;/a&gt;, we should be able to use the multikeyness info of all indexes when a hint is present.&lt;/p&gt;

&lt;p&gt;This ticket is to add tests to make sure this is true for persistent hints and index filters too.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2342592">SERVER-77188</key>
            <summary>[CQF] Test that Bonsai uses the multikeyness info of all indexes when a persistent hint or index filter is present</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="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="hana.pearlman@mongodb.com">Hana Pearlman</reporter>
                        <labels>
                            <label>starter</label>
                            <label>testing</label>
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                <created>Tue, 16 May 2023 17:34:31 +0000</created>
                <updated>Tue, 23 May 2023 12:39:01 +0000</updated>
                                                                                                <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="5443949" author="david.percy" created="Mon, 22 May 2023 23:40:20 +0000"  >&lt;p&gt;Just to clarify, when you say &quot;hidden indexes&quot; I think you mean generally things like hints, persistent hints, &lt;a href=&quot;https://www.mongodb.com/docs/manual/core/query-plans/#std-label-index-filters&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;index filters&lt;/a&gt;?&lt;/p&gt;

&lt;p&gt;Because there is a specific feature called &quot;hidden indexes&quot;: &lt;a href=&quot;https://www.mongodb.com/docs/v6.0/core/index-hidden/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://www.mongodb.com/docs/v6.0/core/index-hidden/&lt;/a&gt;.&#160; And I think we don&apos;t want to use the multikeyness info of indexes hidden this way.&#160; People mark indexes hidden to find out what the consequences of dropping the index would be, while still being able to undo easily.  So as much as possible, the optimizer should pretend these hidden indexes don&apos;t exist.&lt;/p&gt;</comment>
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