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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-6144] Aggregation should error out on divide or mod by zero</title>
                <link>https://jira.mongodb.org/browse/SERVER-6144</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Original Title: dividing by zero makes field disappear&lt;/p&gt;

&lt;p&gt;ExpressionDivide returns Undefined on divide by zero, which causes the field to be dropped.  Might be more appropriate to return +/- Infinity or NaN.&lt;/p&gt;

&lt;p/&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&amp;nbsp;&lt;/pre&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;   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;c.save( { a:NumberLong(10) } );&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;printjson( c.aggregate( { $project:{ z:{ $divide:[ &apos;$a&apos;, 0 ] } } } ) );&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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&lt;p/&gt;

&lt;p&gt;Observed behavior: A field is removed on attempt to set its value to the output of a division by zero.&lt;br/&gt;
Expected behavior: The field is set to an appropriate value ( see above ) rather than removed.&lt;/p&gt;

&lt;p&gt;The same occurs when attempting to mod by zero:&lt;/p&gt;

&lt;p/&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;   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;printjson( c.aggregate( { $project:{ z:{ $mod:[ &apos;$a&apos;, 0 ] } } } ) );&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
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&lt;p/&gt;</description>
                <environment></environment>
        <key id="41935">SERVER-6144</key>
            <summary>Aggregation should error out on divide or mod by zero</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="mathias@mongodb.com">Mathias Stearn</assignee>
                                    <reporter username="aaron">Aaron Staple</reporter>
                        <labels>
                    </labels>
                <created>Wed, 20 Jun 2012 20:48:41 +0000</created>
                <updated>Wed, 31 May 2017 21:55:16 +0000</updated>
                            <resolved>Mon, 17 Dec 2012 19:43:01 +0000</resolved>
                                                    <fixVersion>2.3.2</fixVersion>
                                    <component>Aggregation Framework</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="215479" author="auto" created="Sat, 15 Dec 2012 00:24:31 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-12-14T21:02:41Z&apos;, u&apos;email&apos;: u&apos;mathias@10gen.com&apos;, u&apos;name&apos;: u&apos;Mathias Stearn&apos;}
&lt;p&gt;Message: Improve aggregation handling of nullish Values - part 2&lt;/p&gt;

&lt;p&gt;Changes:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;Nullish values in math expressions (but not accumulators) result in NULL.&lt;/li&gt;
	&lt;li&gt;$divide or $mod by 0 now uasserts.&lt;/li&gt;
	&lt;li&gt;uassert in math expressions if inputs are neither nullish nor numeric.&lt;/li&gt;
	&lt;li&gt;$group fills missing accumulators with NULL rather than Undefined.&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;Related Tickets:&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-7932&quot; title=&quot;Change handling of nullish values in math expressions&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-7932&quot;&gt;&lt;del&gt;SERVER-7932&lt;/del&gt;&lt;/a&gt; Fix handling of nullish Values in math expressions&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-6144&quot; title=&quot;Aggregation should error out on divide or mod by zero&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-6144&quot;&gt;&lt;del&gt;SERVER-6144&lt;/del&gt;&lt;/a&gt; $divide by 0 makes field disappear&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/69ceee8d9c8008b974f11937941e7a591124b82c&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/69ceee8d9c8008b974f11937941e7a591124b82c&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="214346" author="redbeard0531" created="Thu, 13 Dec 2012 21:24:04 +0000"  >&lt;p&gt;In 2.4 dividing or moding by zero will cause the pipeline to error out.&lt;/p&gt;</comment>
                            <comment id="211642" author="auto" created="Tue, 11 Dec 2012 00:21:14 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-12-05T23:55:25Z&apos;, u&apos;email&apos;: u&apos;mathias@10gen.com&apos;, u&apos;name&apos;: u&apos;Mathias Stearn&apos;}
&lt;p&gt;Message: Normalize handling of Undefined vs EOO/missing in agg&lt;/p&gt;

&lt;p&gt;Related tickets:&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-6571&quot; title=&quot;Replace use of Undefined as missing with EOO in aggregation&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-6571&quot;&gt;&lt;del&gt;SERVER-6571&lt;/del&gt;&lt;/a&gt; replace use of Undefined as missing with EOO&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-6471&quot; title=&quot;aggregation $min uses Value ordering to compare null and undefined values, does not exclude null and undefined values from consideration&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-6471&quot;&gt;&lt;del&gt;SERVER-6471&lt;/del&gt;&lt;/a&gt; ignore nullish values in $min and $max accumulators&lt;br/&gt;
&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-6144&quot; title=&quot;Aggregation should error out on divide or mod by zero&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-6144&quot;&gt;&lt;del&gt;SERVER-6144&lt;/del&gt;&lt;/a&gt; divide by zero makes field disappear (this solution isn&apos;t final)&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/459467c7cf47b57d8990eeb41c65b4e203e15b65&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/459467c7cf47b57d8990eeb41c65b4e203e15b65&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="388916">SERVER-29410</issuekey>
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