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    <title>MongoDB Jira</title>
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    <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-9366] Expose projection (aggregation) operators in regular find queries </title>
                <link>https://jira.mongodb.org/browse/SERVER-9366</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Operators like: ($)add, divide, multiply, hour, etc&apos; can be very useful in regular &apos;find&apos; queries and not only aggregations.&lt;/p&gt;

&lt;p&gt;Is there any special reason for this lack of consistency between regular &apos;find&apos; queries and the aggregation framework?&lt;/p&gt;

&lt;p&gt;This is possibly linked to: allow referencing fields on the right-hand-side of operators: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-7623&quot; title=&quot;comparison operation right hand side should be expressions&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-7623&quot;&gt;&lt;del&gt;SERVER-7623&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;</description>
                <environment></environment>
        <key id="72067">SERVER-9366</key>
            <summary>Expose projection (aggregation) operators in regular find queries </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="3">Duplicate</resolution>
                                        <assignee username="backlog-server-query">Backlog - Query Team</assignee>
                                    <reporter username="alonho">Alon Horev</reporter>
                        <labels>
                    </labels>
                <created>Wed, 17 Apr 2013 12:13:14 +0000</created>
                <updated>Tue, 6 Dec 2022 05:21:58 +0000</updated>
                            <resolved>Tue, 16 Jan 2018 19:54:02 +0000</resolved>
                                                                    <component>Querying</component>
                                        <votes>4</votes>
                                    <watches>13</watches>
                                                                                                                <comments>
                            <comment id="1775555" author="asya" created="Tue, 16 Jan 2018 19:54:02 +0000"  >&lt;p&gt;This can now be done using $expr, which allows you to use aggregation expressions in the match language:&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.coll.find( { $expr : { $eq: [ &quot;$x&quot;, {$add: [ &quot;$y&quot; , 3 ] } ] } })&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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&lt;p/&gt;

&lt;p&gt;See documentation for the feature here: &lt;a href=&quot;https://docs.mongodb.com/master/reference/operator/query/expr/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://docs.mongodb.com/master/reference/operator/query/expr/&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;The work was done as &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-30731&quot; title=&quot;Add $expr support in MatchExpression outside of aggregation&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-30731&quot;&gt;&lt;del&gt;SERVER-30731&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
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            <issuekey id="11712">SERVER-974</issuekey>
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            <issuekey id="179114">SERVER-16896</issuekey>
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            <issuekey id="93117">SERVER-11072</issuekey>
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            <issuekey id="71051">SERVER-9272</issuekey>
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            <issuekey id="95566">SERVER-11345</issuekey>
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