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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>
    </build-info>


<item>
            <title>[SERVER-19627] Add experimental Decimal128 data type support to the MongoDB shell as NumberDecimal</title>
                <link>https://jira.mongodb.org/browse/SERVER-19627</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Add support for both v8-3.12 and mozjs.&lt;/p&gt;

&lt;p&gt;Note: Do not support shell arithmetic operations for NumberDecimal data type. Currently shell arithmetic on NumberLong functions on a float approx., which is not suitable for precise decimal data types.&lt;/p&gt;</description>
                <environment></environment>
        <key id="223006">SERVER-19627</key>
            <summary>Add experimental Decimal128 data type support to the MongoDB shell as NumberDecimal</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</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="raymond.jacobson">Raymond Jacobson</assignee>
                                    <reporter username="raymond.jacobson">Raymond Jacobson</reporter>
                        <labels>
                            <label>dnsf</label>
                    </labels>
                <created>Tue, 28 Jul 2015 14:11:18 +0000</created>
                <updated>Thu, 3 Nov 2016 22:06:07 +0000</updated>
                            <resolved>Thu, 13 Aug 2015 15:47:28 +0000</resolved>
                                    <version>3.1.7</version>
                                    <fixVersion>3.1.7</fixVersion>
                                    <component>Shell</component>
                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="1425728" author="max.hirschhorn@10gen.com" created="Thu, 3 Nov 2016 22:06:07 +0000"  >&lt;blockquote&gt;
&lt;p&gt;JavaScript, the language, does not make it possible to implement support for numeric types other than double.&lt;/p&gt;&lt;/blockquote&gt;

&lt;p&gt;This isn&apos;t entirely accurate, as it is possible to inject additional C++ functions to add/subtract/etc. &lt;tt&gt;NumberLong&lt;/tt&gt; and &lt;tt&gt;NumberDecimal&lt;/tt&gt; instances. What isn&apos;t possible is to get it to work with the &lt;tt&gt;+&lt;/tt&gt; operator because the &lt;tt&gt;valueOf()&lt;/tt&gt; method will convert to a &lt;tt&gt;Number&lt;/tt&gt; instance. Defining an alternate syntax is what &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-14217&quot; title=&quot;Support NumberLong arithmetic in mongo shell and server JS&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-14217&quot;&gt;SERVER-14217&lt;/a&gt; and &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-19943&quot; title=&quot;Support NumberDecimal arithmetic in mongo shell and server JS&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-19943&quot;&gt;&lt;del&gt;SERVER-19943&lt;/del&gt;&lt;/a&gt; are intended to capture.&lt;/p&gt;</comment>
                            <comment id="1425696" author="geert.bosch" created="Thu, 3 Nov 2016 21:43:35 +0000"  >&lt;p&gt;Indeed, we cannot. JavaScript, the language, does not make it possible to implement support for numeric types other than double.&lt;br/&gt;
So, you might say: &quot;but MongoDB supports addition for NumberLong, right?&quot;&lt;/p&gt;

&lt;p&gt;See:&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;   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; x=NumberLong(&quot;123456789012345678&quot;)&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;NumberLong(&quot;123456789012345678&quot;)&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; y=NumberLong(&quot;1&quot;)&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;NumberLong(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; x + y&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;123456789012345680&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;The arithmetic is performed using double precision floating point, and the result is no longer a NumberLong. This is already confusing and error-prone for NumberLong for people using numbers larger than 2**53. However, for NumberDecimal, we&apos;d get subtly wrong results all the time. This is the reason we don&apos;t silently convert NumberDecimal to double precision in the shell. &lt;/p&gt;</comment>
                            <comment id="1425657" author="buzz.moschetti" created="Thu, 3 Nov 2016 21:17:34 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=geert.bosch&quot; class=&quot;user-hover&quot; rel=&quot;geert.bosch&quot;&gt;geert.bosch&lt;/a&gt;   Do we still not support NumberDecimal math in the shell?&lt;/p&gt;</comment>
                            <comment id="1004478" author="xgen-internal-githook" created="Thu, 13 Aug 2015 15:35:20 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;raymondjacobson&apos;, u&apos;name&apos;: u&apos;Raymond Jacobson&apos;, u&apos;email&apos;: u&apos;raymond.jacobson@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-19627&quot; title=&quot;Add experimental Decimal128 data type support to the MongoDB shell as NumberDecimal&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-19627&quot;&gt;&lt;del&gt;SERVER-19627&lt;/del&gt;&lt;/a&gt; Add Decimal128 type support to mongo shell&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/9a81b7f1a6a8e0773703f2007c5a7268eb182b91&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/9a81b7f1a6a8e0773703f2007c5a7268eb182b91&lt;/a&gt;&lt;/p&gt;</comment>
                    </comments>
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                                            <outwardlinks description="depends on">
                                        <issuelink>
            <issuekey id="223002">SERVER-19624</issuekey>
        </issuelink>
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                                                                <inwardlinks description="is depended on by">
                                        <issuelink>
            <issuekey id="224054">SERVER-19752</issuekey>
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