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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-3611] CLONE - query that just returns value in index should get data from index</title>
                <link>https://jira.mongodb.org/browse/SERVER-3611</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>
&lt;p&gt;if you have something like&lt;br/&gt;
db.users.save( &lt;/p&gt;
{ name : &quot;&quot; , address... , etc... }
&lt;p&gt; )&lt;br/&gt;
db.users.ensureIndex( &lt;/p&gt;
{ name : 1 }
&lt;p&gt; )&lt;br/&gt;
and you do&lt;br/&gt;
db.users.find( {} , &lt;/p&gt;
{ name : 1 }
&lt;p&gt; )&lt;br/&gt;
it should only look at the index and never go to object.&lt;/p&gt;</description>
                <environment></environment>
        <key id="21053">SERVER-3611</key>
            <summary>CLONE - query that just returns value in index should get data from index</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="eliot">Eliot Horowitz</assignee>
                                    <reporter username="fightbulc">Tino Ehrich</reporter>
                        <labels>
                    </labels>
                <created>Tue, 16 Aug 2011 14:43:29 +0000</created>
                <updated>Tue, 16 Aug 2011 14:55:32 +0000</updated>
                            <resolved>Tue, 16 Aug 2011 14:52:32 +0000</resolved>
                                                                    <component>Querying</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="48819" author="eliot" created="Tue, 16 Aug 2011 14:52:33 +0000"  >&lt;p&gt;See: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-2109&quot; title=&quot;Query optimizer should pick plans that can use covered indexes&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-2109&quot;&gt;&lt;del&gt;SERVER-2109&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="48817" author="fightbulc" created="Tue, 16 Aug 2011 14:49:53 +0000"  >&lt;p&gt;This issue still exists for 1.8.2&lt;/p&gt;

&lt;p&gt;When adding an index&lt;/p&gt;

&lt;p&gt;    db.contacts.ensureIndex(&lt;/p&gt;
{name:1}
&lt;p&gt;)&lt;/p&gt;

&lt;p&gt;and querying via&lt;/p&gt;

&lt;p&gt;    db.contacts.find({},&lt;/p&gt;
{name:1,_id:0}
&lt;p&gt;)&lt;/p&gt;

&lt;p&gt;no index is touched. Index is only touched when forced via&lt;/p&gt;

&lt;p&gt;    hint(&lt;/p&gt;
{name:1}
&lt;p&gt;) or via sort(&lt;/p&gt;
{name:1}
&lt;p&gt;)&lt;/p&gt;

&lt;p&gt;PS: I am new here so I hope that cloning the old issue is the correct workflow. Cheers&lt;/p&gt;
</comment>
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