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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-5320] Make $elemMatch support single object</title>
                <link>https://jira.mongodb.org/browse/SERVER-5320</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently $elemMatch only supports array values, so queries such as {foo: {$elemMatch: &lt;/p&gt;
{a:1, b:2}
&lt;p&gt;}} will match {foo:[&lt;/p&gt;
{a:1, b:2, c:3}
&lt;p&gt;]}, but not {foo: {a:1, b:2, c:3}}. I know this can be easily done by query &lt;/p&gt;
{&apos;foo.a&apos;:1, &apos;foo.b&apos;:2}
&lt;p&gt;, but this behavior is inconsistent with other query operations; e.g. &lt;/p&gt;
{a:1}
&lt;p&gt; will match both &lt;/p&gt;
{a:[1]}
&lt;p&gt; and &lt;/p&gt;
{a:1}
&lt;p&gt;.&lt;/p&gt;

&lt;p&gt;I&apos;m currently writing a DSL for mongo, and I find it hard to explain this inconsistency to users. But I don&apos;t know if changing this will affect query optimizer.&lt;/p&gt;</description>
                <environment></environment>
        <key id="33043">SERVER-5320</key>
            <summary>Make $elemMatch support single object</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</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="-1">Unassigned</assignee>
                                    <reporter username="zefei">Zefei Xuan</reporter>
                        <labels>
                            <label>query</label>
                    </labels>
                <created>Thu, 15 Mar 2012 12:16:13 +0000</created>
                <updated>Sat, 9 Jul 2016 21:09:14 +0000</updated>
                            <resolved>Thu, 7 Mar 2013 17:20:44 +0000</resolved>
                                    <version>2.1.0</version>
                                                    <component>Querying</component>
                                        <votes>1</votes>
                                    <watches>3</watches>
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