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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-65465] SBE Group should not use DoubleDoubleSummation for count</title>
                <link>https://jira.mongodb.org/browse/SERVER-65465</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;I was surprised to see the following:&lt;br/&gt;
 &lt;span class=&quot;image-wrap&quot; style=&quot;&quot;&gt;&lt;img src=&quot;https://jira.mongodb.org/secure/attachment/372498/372498_image-2022-04-11-16-44-15-719.png&quot; style=&quot;border: 0px solid black&quot; /&gt;&lt;/span&gt; &lt;/p&gt;

&lt;p&gt;when profiling&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;
		&lt;tbody &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-top: 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;db.products.aggregate([{$group:{_id:&apos;$type&apos;, count: {$sum:1}}}], {hint:{&apos;$natural&apos;: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;Because we just summing the constant 1, there is no need for compensated summation: we should just count using a 64-bit integer. It won&apos;t overflow.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2022589">SERVER-65465</key>
            <summary>SBE Group should not use DoubleDoubleSummation for count</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="yoonsoo.kim@mongodb.com">Yoon Soo Kim</assignee>
                                    <reporter username="geert.bosch@mongodb.com">Geert Bosch</reporter>
                        <labels>
                    </labels>
                <created>Mon, 11 Apr 2022 20:47:18 +0000</created>
                <updated>Sun, 29 Oct 2023 21:39:39 +0000</updated>
                            <resolved>Wed, 4 May 2022 22:23:15 +0000</resolved>
                                                    <fixVersion>6.1.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>8</watches>
                                                                                                                <comments>
                            <comment id="4527246" author="xgen-internal-githook" created="Wed, 4 May 2022 22:18:04 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Yoonsoo Kim&apos;, &apos;email&apos;: &apos;yoonsoo.kim@mongodb.com&apos;, &apos;username&apos;: &apos;yun-soo&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-65465&quot; title=&quot;SBE Group should not use DoubleDoubleSummation for count&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-65465&quot;&gt;&lt;del&gt;SERVER-65465&lt;/del&gt;&lt;/a&gt; Have the SBE $sum use a simple `sum` for a count-like sum&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/25c0fbade9ec93a3c5458fc5c7d2481adad064c7&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/25c0fbade9ec93a3c5458fc5c7d2481adad064c7&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4507809" author="geert.bosch" created="Tue, 26 Apr 2022 19:13:28 +0000"  >&lt;p&gt;This may actually be addressed by &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-65735&quot; title=&quot;$add operator should not use DoubleDoubleSummation in the classic engine&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-65735&quot;&gt;&lt;del&gt;SERVER-65735&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
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            <issuekey id="1995022">SERVER-64227</issuekey>
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            <issuekey id="2068580">SERVER-67282</issuekey>
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            <issuelink>
            <issuekey id="2342855">SERVER-77203</issuekey>
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                            <attachment id="376287" name="Screen Shot 2022-04-28 at 9.29.50 AM.png" size="79992" author="yoonsoo.kim@mongodb.com" created="Thu, 28 Apr 2022 16:33:19 +0000"/>
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