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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-38010] Count command with no predicate and limit of min long returns incorrect result</title>
                <link>https://jira.mongodb.org/browse/SERVER-38010</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;In general, the count command treats a limit of -&lt;tt&gt;n&lt;/tt&gt; as identical to a limit of &lt;tt&gt;n&lt;/tt&gt;:&lt;/p&gt;

&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
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			&lt;/td&gt;
		&lt;/tr&gt;
				&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;n&quot; : 11, &quot;ok&quot; : 1 }&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&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;&amp;gt; db.runCommand({count: &quot;c&quot;, limit: -10})&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;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 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;n&quot; : 10, &quot;ok&quot; : 1 }&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;

&lt;p&gt;This is &lt;a href=&quot;https://github.com/mongodb/mongo/blob/r4.0.4/src/mongo/db/query/count_request.cpp#L75-L78&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;implemented by taking the absolute value of a long long&lt;/a&gt;. Taking the absolute value is incorrect for the smallest negative long long, since its absolute value is too large to be represented with 64 signed bits. Consequently, the count command returns an incorrect result when the limit is -2^63:&lt;/p&gt;

&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&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;&amp;gt; db.runCommand({count: &quot;c&quot;, limit: NumberLong(-9223372036854775808)})&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&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;   margin-bottom: 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;n&quot; : NumberLong(&quot;-9223372036854775808&quot;), &quot;ok&quot; : 1 }&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;This bug affects 4.0, and probably older branches (but I only confirmed on 4.0). It was fixed in 4.1 development by &lt;a href=&quot;https://github.com/mongodb/mongo/commit/f0b39d9184094661fcaa1049531b80b5ad6b3995&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;f0b39d91840&lt;/a&gt; under &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-37446&quot; title=&quot;Make remaining collection access stages check collection UUID on yield recovery&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-37446&quot;&gt;&lt;del&gt;SERVER-37446&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</description>
                <environment></environment>
        <key id="630383">SERVER-38010</key>
            <summary>Count command with no predicate and limit of min long returns incorrect result</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="backlog-server-query">Backlog - Query Team</assignee>
                                    <reporter username="david.storch@mongodb.com">David Storch</reporter>
                        <labels>
                            <label>neweng</label>
                    </labels>
                <created>Wed, 7 Nov 2018 20:31:58 +0000</created>
                <updated>Tue, 6 Dec 2022 03:13:19 +0000</updated>
                            <resolved>Fri, 9 Nov 2018 16:19:45 +0000</resolved>
                                    <version>4.0.4</version>
                                                    <component>Querying</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="2057257" author="ian@10gen.com" created="Fri, 9 Nov 2018 16:19:45 +0000"  >&lt;p&gt;closing as Won&apos;t Fix since this is already fixed in master.&lt;/p&gt;</comment>
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            <issuekey id="613541">SERVER-37446</issuekey>
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