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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-28789] Add a &apos;initial value&apos; parameter to $inc</title>
                <link>https://jira.mongodb.org/browse/SERVER-28789</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;$inc is great to increment an existing field by a given amount, however for a newly created document you should be able to set the initial value for the field, rather than to assume it should be the same as the increment value.&lt;/p&gt;

&lt;p&gt;Change &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;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;{ $inc: { &amp;lt;field1&amp;gt;: &amp;lt;amount1&amp;gt;, &amp;lt;field2&amp;gt;: &amp;lt;amount2&amp;gt;, ... } } &lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;

&lt;p&gt;To&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;{ $inc: { &amp;lt;field1&amp;gt;: {start:&amp;lt;value1&amp;gt;, next:&amp;lt;amount1},&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;   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;lt;field2&amp;gt;:  {start:&amp;lt;value2&amp;gt;, next:&amp;lt;amount2}, ... } } &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 need became apparent when using upsert = true on an update with a field that is normally incremented if it exists, but should have a user defined starting value when it does not. &lt;/p&gt;</description>
                <environment></environment>
        <key id="373749">SERVER-28789</key>
            <summary>Add a &apos;initial value&apos; parameter to $inc</summary>
                <type id="2" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14711&amp;avatarType=issuetype">New Feature</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="12300">Won&apos;t Do</resolution>
                                        <assignee username="backlog-server-query">Backlog - Query Team</assignee>
                                    <reporter username="ensefik">Edem Nsefik</reporter>
                        <labels>
                    </labels>
                <created>Thu, 13 Apr 2017 10:08:37 +0000</created>
                <updated>Tue, 6 Dec 2022 04:03:17 +0000</updated>
                            <resolved>Sat, 29 Jun 2019 08:15:52 +0000</resolved>
                                                                    <component>Write Ops</component>
                                        <votes>1</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="2305660" author="asya" created="Sat, 29 Jun 2019 08:15:52 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-40381&quot; title=&quot;Add the ability to specify a pipeline to an update command&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-40381&quot;&gt;&lt;del&gt;SERVER-40381&lt;/del&gt;&lt;/a&gt; implemented support for aggregation expressions to specify update for 4.2.&#160;&lt;/p&gt;

&lt;p&gt;You can see some examples &lt;a href=&quot;https://docs.mongodb.com/master/reference/command/update/index.html#update-command-example-agg&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here.&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;This can be done by testing if the field that you want to increment/etc exists in the document and take appropriate action based on result.&lt;/p&gt;</comment>
                            <comment id="1571286" author="asya" created="Mon, 15 May 2017 16:00:14 +0000"  >&lt;p&gt;This feature would be useful not just for upserts, but for regular updates as well, since it&apos;s possible for a particular field not to exist when it&apos;s first being updated via $inc.&lt;/p&gt;

&lt;p&gt;In addition it makes sense to have this option for update operators other than &quot;$inc&quot; - for instance it makes sense for $push, $min $max, etc.  Currently some update operators that expect numbers start with initial value of 0 for empty fields($inc,$mul,$bit), others use nothing($min, $max), array operators assume arrays are &lt;tt&gt;[]&lt;/tt&gt;.&lt;/p&gt;

&lt;p&gt;The new feature should be considered in the context of all of these operators accepting optional initial value other than default.  Since that syntax might get complex, it&apos;s possible that instead, the same requirement could be satisfied with ordered conditional updates feature tracked in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-6566&quot; title=&quot;Support conditional updates: $updates&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-6566&quot;&gt;&lt;del&gt;SERVER-6566&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
                            <comment id="1548120" author="david.storch" created="Thu, 13 Apr 2017 13:45:40 +0000"  >&lt;p&gt;Thanks for the feature request &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=ensefik&quot; class=&quot;user-hover&quot; rel=&quot;ensefik&quot;&gt;ensefik&lt;/a&gt;. I am sending this to the MongoDB Query Team for consideration.&lt;/p&gt;</comment>
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            <issuekey id="45148">SERVER-6566</issuekey>
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