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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
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        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-1587] $exists:false not working correctly</title>
                <link>https://jira.mongodb.org/browse/SERVER-1587</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When running a query with an $exists, a value of false causes the query to return 0 results.&lt;/p&gt;

&lt;p&gt;db.foo.find({value:{$exists:false}});&lt;/p&gt;

&lt;p&gt;The only fix I found was using $not with an $exists:true&lt;/p&gt;

&lt;p&gt;db.foo.find({$not:{value:{$exists:true}}})&lt;/p&gt;</description>
                <environment>Ubuntu 10.4 64-bit</environment>
        <key id="12703">SERVER-1587</key>
            <summary>$exists:false not working correctly</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</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="9">Done</resolution>
                                        <assignee username="aaron">Aaron Staple</assignee>
                                    <reporter username="davidma7685">david ash</reporter>
                        <labels>
                    </labels>
                <created>Sat, 7 Aug 2010 07:19:24 +0000</created>
                <updated>Tue, 12 Jul 2016 00:18:11 +0000</updated>
                            <resolved>Wed, 6 Apr 2011 01:27:22 +0000</resolved>
                                    <version>1.6.0</version>
                                    <fixVersion>1.9.0</fixVersion>
                                    <component>Querying</component>
                                        <votes>5</votes>
                                    <watches>8</watches>
                                                                                                                <comments>
                            <comment id="27869" author="aaron" created="Tue, 5 Apr 2011 20:37:26 +0000"  >&lt;p&gt;I believe the examples here were fixed in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-1701&quot; title=&quot;exists doesn&amp;#39;t work correctly when using index&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-1701&quot;&gt;&lt;del&gt;SERVER-1701&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
                            <comment id="27851" author="auto" created="Tue, 5 Apr 2011 20:14:33 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;login&apos;: u&apos;astaple&apos;, u&apos;name&apos;: u&apos;Aaron&apos;, u&apos;email&apos;: u&apos;aaron@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-1587&quot; title=&quot;$exists:false not working correctly&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-1587&quot;&gt;&lt;del&gt;SERVER-1587&lt;/del&gt;&lt;/a&gt; add tests&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/74086c6f40a39a34b3ba034ed82b695cc4758f37&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/74086c6f40a39a34b3ba034ed82b695cc4758f37&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="23015" author="visnup" created="Wed, 2 Feb 2011 23:20:10 +0000"  >&lt;p&gt;another similar bug at &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-2470&quot; title=&quot;sort (using an index + $exists) incorrectly excluding results&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-2470&quot;&gt;&lt;del&gt;SERVER-2470&lt;/del&gt;&lt;/a&gt; (closed as duplicate), but manifesting itself in a specific way, and with a small reproduce case.&lt;/p&gt;</comment>
                            <comment id="18005" author="aspacca" created="Fri, 10 Sep 2010 13:21:48 +0000"  >&lt;p&gt;I opened a similar ticket few days ago: &lt;a href=&quot;http://jira.mongodb.org/browse/SERVER-1735&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;http://jira.mongodb.org/browse/SERVER-1735&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Just to inform people&lt;/p&gt;</comment>
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