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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-19676] NumberDecimal(...) + NumberDecimal(...) should not cause string concatentation</title>
                <link>https://jira.mongodb.org/browse/SERVER-19676</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description></description>
                <environment></environment>
        <key id="216464">SERVER-19676</key>
            <summary>NumberDecimal(...) + NumberDecimal(...) should not cause string concatentation</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="mira.carey@mongodb.com">Mira Carey</assignee>
                                    <reporter username="david.hatch">David Hatch</reporter>
                        <labels>
                            <label>decimal-data-type</label>
                    </labels>
                <created>Mon, 13 Jul 2015 18:05:38 +0000</created>
                <updated>Wed, 5 Apr 2017 16:43:56 +0000</updated>
                            <resolved>Mon, 13 Feb 2017 18:04:19 +0000</resolved>
                                                                    <component>Internal Code</component>
                                        <votes>1</votes>
                                    <watches>9</watches>
                                                                                                                <comments>
                            <comment id="1497939" author="jason.carey" created="Mon, 13 Feb 2017 18:04:07 +0000"  >&lt;p&gt;Due to the fundamental problems inherent to doing non-floating point math in javascript, there isn&apos;t any easy system to hook into to provide arithmetic support for our types.  If/when javascript provides operator overloading, or something that looks more live value types, we may revisit the issue.  In the meantime, we aren&apos;t planning on re-implementing arithmetic via methods.&lt;/p&gt;</comment>
                            <comment id="1334954" author="geert.bosch" created="Mon, 25 Jul 2016 22:57:01 +0000"  >&lt;p&gt;JS fundamentally only supports &lt;tt&gt;double&lt;/tt&gt; as numerical type.&lt;br/&gt;
Operations with &lt;tt&gt;NumberLong&lt;/tt&gt; exceeding 2**53 will not always work as expected:&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&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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				&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;1000000000000000000&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; x + 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;NumberLong(&quot;1000000000000000000&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; x &amp;lt; (x + 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;false&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;&amp;gt; &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;Rather providing operators that appear to work on &lt;tt&gt;NumberDecimal&lt;/tt&gt;, but throw away most of the precision and result in inaccurate results, the &lt;tt&gt;mongo&lt;/tt&gt; shell does not support any numerical operations on &lt;tt&gt;NumberDecimal&lt;/tt&gt;. It is possible to compute expressions using &lt;tt&gt;NumberDecimal&lt;/tt&gt; using the MongoDB query and aggregation language though, and these operations are performed accurately using the full precision of the NumberDecimal type.&lt;/p&gt;</comment>
                            <comment id="1003576" author="raymond.jacobson" created="Wed, 12 Aug 2015 19:39:13 +0000"  >&lt;p&gt;var x = {}&lt;br/&gt;
x + {} in JS gives &quot;&lt;span class=&quot;error&quot;&gt;&amp;#91;Object object&amp;#93;&lt;/span&gt;&lt;span class=&quot;error&quot;&gt;&amp;#91;Object object&amp;#93;&lt;/span&gt;&quot;&lt;br/&gt;
typeof(x + {}) in JS gives string.&lt;/p&gt;

&lt;p&gt;.compare has been implemented on NumberLong in the shell. Operations such as .add, .mul, etc. could be implemented on NumberLong &amp;amp; NumberDecimal as well.&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10011">
                    <name>Depends</name>
                                            <outwardlinks description="depends on">
                                        <issuelink>
            <issuekey id="223014">SERVER-19629</issuekey>
        </issuelink>
                            </outwardlinks>
                                                        </issuelinktype>
                            <issuelinktype id="10012">
                    <name>Related</name>
                                            <outwardlinks description="related to">
                                        <issuelink>
            <issuekey id="141254">SERVER-14217</issuekey>
        </issuelink>
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